Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-02-23
Abstract： A smart meter is not just a device used to measure electricity, but has become a core component of the smart grid, enabling efficient monitoring, prediction and management of electricity use. After taking a closer look at the evolution of smart meter technology, I realized that this change did not happen overnight. It has gone through a long journey from the original mechanical meter to the electronic meter and then to today's highly intelligent meter. Technological breakthroughs at each stage laid the foundation for the final form of the smart meter. In the era of mechanical meters, the measurement of electrical mainly relied on the rotation and counting of mechanical structures. The accuracy and stability of this method are affected by mechanical wear, environmental disturbances and other factors, and it is difficult to meet the growing demand for power management. With the rapid development of electronic technology, electronic meters came into being. It uses electronic technology to sample and process current and voltage, which greatly improves the accuracy and stability of measurement. At the same time, the electronic meter also has the functions of remote meter reading and data processing, which brings great convenience to power management. However, electronic meters still have some limitations, such as the complexity of data processing and the limited communication capabilities. It is these challenges that have driven the creation of smart meters. Smart meters combine advanced technologies such as the Internet of Things, big data, and cloud computing to achieve real-time monitoring, analysis, and prediction of power usage. It can not only accurately measure electricity, but also provide personalized electricity consumption suggestions and energy-saving solutions according to users' electricity consumption behaviors and needs. Communication technology plays a crucial role in the evolution of smart meter technology. From the initial wired communication to the integration of various communication methods such as wireless public network, wireless private network, and power line carrier, the smart meter realizes real-time communication and data sharing with the power grid management system. This makes power management more intelligent and efficient, and provides users with a more convenient and personalized electricity experience. However, the development of smart meter technology also faces some challenges. How to ensure data security and privacy protection is an urgent problem to be solved. At the same time, with the continuous development of smart grids, smart meters need to achieve closer connection and coordination with other devices to achieve more efficient and reliable power management. Looking to the future, I believe that smart meter technology will continue to innovate and break through. With the further development of technologies such as the Internet of Things, big data, and artificial intelligence, smart meters will have more powerful functions and performance, providing a more solid foundation for the intelligence and efficiency of the power industry. At the same time, we also need to pay attention to challenges such as data security, technical standards, and costs, and actively seek solutions to promote the continuous development and application of smart meter technology.
Peer Review Status:
Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-02-23
Abstract： During the "13th Five-Year Plan" period, the State Grid smart meter market will usher in major changes, in which the demand for smart meters will drop significantly, but the demand for supporting equipment such as plug-in meter boxes will increase. In the face of this market change, traditional meter companies need to accelerate the diversified development of meter products to meet the new market demand. On the one hand, in addition to the traditional meter, terminal, plug-in meter box market, it is also necessary to pay attention to some promising meter market, such as statistical meter + electricity consumption monitoring + low-voltage power grid maximum load measurement and control system, four-in-one collection, low-voltage metering box and low-voltage cabinet series products. These markets will provide new growth points for meter companies. On the other hand, the demand for mainstream products in the non-centralized procurement market also needs to be taken seriously. The needs of this market include statistical meters, all-in-one card detection sockets, industrial input/output (I/O) modules and various monitoring systems, and integrated energy consumption data management systems for electricity, water, gas, heat and cold meters. These products will help improve the intelligence level of electricity meters and meet the diverse needs of users. In addition, the development of innovative smart meter products is also an important direction in the future. These innovative products will help improve the accuracy, stability and reliability of electricity meters, and improve the intelligence level of the power grid. In general, during the "13th Five-Year Plan" period, meter companies need to keep up with market changes, accelerate the development of product diversification, and improve the intelligent level of products to adapt to new market demand. At the same time, the government and enterprises also need to increase their support for meter technology innovation and promote the technological progress and industrial upgrading of the meter industry.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-02-23
Abstract： In August 2015, the craze of "four-table collection" heated up rapidly due to the notice of the State Grid Marketing Department. This notice has promoted the unified collection of electricity, water, gas and heat meter data, which has aroused widespread attention inside and outside the industry. With the rise of this craze, there are different views and controversies on whether to promote the "four-in-one collection" or to develop the collection of water, gas and heat industries. The development process of this boom began in early 2014, when the marketing department of the State Grid first proposed a technical scheme for the integration of four tables into one. Subsequently, in August 2015, Yangzhou and Jining successively carried out the pilot work of four-in-one collection, and achieved remarkable results. As a result, the State Grid also held a technical exchange meeting in Jining, Shandong Province, to promote this pilot experience. With the heating up of the "four table collection" craze, the reaction inside and outside the industry has become more and more intense. On the one hand, some organizations such as "Global Metering" have organized relevant thematic meetings to discuss the technology and application of four-meter centralized reading; On the other hand, different industries have also begun to organize the formulation of technical standards for the collection of four tables to promote their application in their respective fields. However, there are differences of opinion on the formulation of unified standards, and some people believe that it is difficult to formulate unified national standards and industry standards because the four tables are in different industries. At the same time, China's modern power grid measurement technology has also begun to organize the top-level design research of the four-meter centralized copy. These studies not only discuss the technical framework and architecture design of the four-table collection, but also conduct in-depth research on its relationship with the energy Internet. In addition, the collection of water, gas and heat sub-industries is also quietly upgrading. For example, the Beijing Water Supply Group has proposed a new concept of independent/zoned metering of water supply, which can accurately monitor and manage the water supply by installing independent on/off valves and flow meters. At the same time, the gas industry is also promoting intelligent engineering to improve the safety and efficiency of gas production and operation through intelligent monitoring and control systems. Despite the controversy and disagreement, the initial results of the "Four Tables Collection Copy" have already appeared. According to the 2015 social responsibility report of the State Grid Corporation, the company has made significant progress in accelerating the collection of electricity, water, gas and heat data in 2015. This progress not only improves the efficiency and accuracy of data collection, but also helps to realize intelligent and refined energy management. Overall, the rise of the "four-table collection" boom marks an important change in the field of energy management. Although there are different views and controversies in this process, through continuous technological innovation and standard formulation, the "four-table centralized copying" is expected to become one of the mainstream trends in the field of energy management in the future. At the same time, with the continuous development of the energy Internet, the "four-meter centralized copying" will also be deeply integrated with it to promote the intelligent and sustainable development of energy management.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter Subjects: Engineering and technical science >> Metrology submitted time 2024-02-14
Abstract： mainly describes the functional controversy of the State Grid smart meter and its importance in the construction of ubiquitous power Internet of Things. At present, the State Grid smart meter only has the primary interactive function, and in order to realize the "ubiquitous connection" and "holographic perception" of the ubiquitous power Internet of Things, the smart meter needs to have advanced interactive functions. Therefore, it is time to accelerate the development of the "smart" function of smart meters, which is a necessary choice to promote the construction of ubiquitous power Internet of Things. At the same time, the paper also points out that smart meters, as the only legal measuring instruments used as two-way power flow trade settlement, have the advantages of large volume, wide distribution, and close distance from users and other devices, and are the best nodes for ubiquitous connection and holographic perception. Therefore, accelerating the development of the "smart" function of smart meters is the only option to promote the implementation of the "ubiquitous connection" and "holographic perception" requirements of bidirectional power flow trade settlement metering of the ubiquitous power Internet of Things.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-02-13
Abstract： The general technical specifications and modular design requirements of three-phase smart IoT meters are introduced. The three-phase smart IoT meter consists of a metering module, a management module, and an expansion module, which has a variety of functions and adapts to the needs of the Internet of Things. The specification combines the requirements of the IEC electricity meter standard, the 2013 version of the State Grid smart meter technology, the functional standard and the IR46 standard, and introduces a modular design. The modular design allows the meter to be expanded as needed, improving flexibility and maintainability. Among them, the metering module has the ability to make legal measurement and can work independently, while the management module is responsible for the user interface and communication functions. This paper provides a technical basis and design guidance for the popularization, application and long-term development of three-phase smart IoT meters
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter Subjects: Engineering and technical science >> Metrology submitted time 2024-02-12
Abstract： Since 2021, the meter industry has faced multiple challenges such as slow market growth, reduced technology demand, brain drain and insufficient revenue, and the current recession faced by the meter industry, especially in the lack of technical demand for new products, the loss of development talents, and the inability of operating income to meet the development needs of enterprises. In view of these problems, this paper puts forward the importance of promoting the development and application of new technologies for domestic smart meter metering, especially the need to adapt to the demand for electric energy metering and monitoring caused by the connection of new energy grids and complex power grid loads. To this end, this paper proposes a new project for the development and application of three-phase broadband smart meters that have undergone the actual power grid waveform test and assessment, in order to promote the development of new technologies and markets in the meter industry. At the same time, the article also mentions that the 0.005 three-phase broadband electric energy standard meter is included in the national key research and development plan, which provides a measurement traceability guarantee for the development and application of three-phase broadband electric energy meter. In addition, the paper also analyzes the impact of renewable energy integration on the operation status of traditional power grids, including broadband oscillation, overvoltage and broadband harmonic current, and points out the lack of online metering and monitoring smart meters for these anomalies. Therefore, the development of three-phase broadband watt-hour meters is of great significance to solve these problems.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-02-03
Abstract： This paper mainly introduces the IEEE1901.1 international standard for broadband (intermediate frequency) power line carrier communication and its application in the power consumption information acquisition system of the State Grid. The standard was issued by the China Electric Power Research Institute, which fills the gap in the international standard of medium frequency power line carrier communication in the field of smart grid, and enhances China's international influence and voice in the field of Internet of Things. At the same time, the State Grid attaches great importance to the development of broadband (medium frequency) power line carrier communication technology, mainly because the communication rate of narrowband (low-speed) carrier communication mode is slow, and the success rate of automatic acquisition is low, which has become a technical bottleneck for local communication. This paper also introduces the investment in the construction of the State Grid electricity information collection system, as well as the power consumption information collection requirements that need to be met by the broadband (intermediate frequency) carrier communication rate.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-02-02
Abstract： This article mainly discusses the application and potential of smart meters in the field of power distribution, as well as two different technical solutions for active repair of distribution networks. The article describes the application and potential of smart meters in the field of power distribution. Since 2017, although the demand for smart meters in the basic market is not strong, it has broad application prospects in the large-scale construction and transformation of intelligent distribution networks, including the monitoring and optimization of the operation level of comprehensive indicators of distribution networks, the emergency repair of distribution networks from passive to active, and the monitoring and control of high power quality of distribution networks. This paper discusses two different technical solutions for active repair of distribution networks. The first is the Suzhou Power Supply Company's distribution network active repair system based on new smart meters. The system learns from the "Last Gasp" function concept of Jemena in Australia to realize the function of the smart meter to actively upload power outage information after a power outage. At the level of the emergency repair system, the distribution network unified distribution data model and greedy algorithm are used to quickly respond and analyze the scope of power outages. In the pilot project of Beilian Village, Wujiang District, Suzhou City, the system has greatly improved the quality and efficiency of emergency repair, and it only takes 1 minute from the user's power outage to receiving the power outage fault information, and the emergency repair personnel can restore the user's electricity within 10 minutes. The second is the terminal power grid intelligent perception system developed by Jiangsu Electric Power. By monitoring the changes in the voltage data at the back end of the user's meter, the system can sense the power outage status in advance and accurately reach the household, so as to realize the real-time monitoring of the terminal power grid. When a user loses power, the abnormal data will be transmitted to the branch box and distribution transformer step by step through the topological relationship, and the distribution network staff can know the user who has lost power within 30 seconds, without the need to check from house to house. To sum up, smart meters have a wide range of application prospects and great potential in the field of power distribution. By introducing and exploring new technical solutions, such as the distribution network active repair system based on new smart meters and the terminal power grid intelligent perception system, the operation efficiency and reliability of the distribution network can be greatly improved, and users can be provided with better power supply services.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-31
Abstract： This article mainly introduces the construction process and related technical development of the State Grid electricity information collection system. Firstly, this paper summarizes the construction goals and development process of the State Grid electricity information collection system, and focuses on the construction and application effect of the power consumption information collection system of Jiangsu Power Grid. Then, the key technologies and engineering applications of the power information acquisition system are summarized and described, including the system architecture, the number of terminals and channel types, the master station equipment, data management and application. This paper mentions the key technologies of the power consumption information acquisition system, including low-cost communication mode, safety requirements for large user load control, wireless public network online technology, unified data model and parallel data processing technology. In general, this paper provides a useful reference for the technical exploration of the State Grid electricity information collection system.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter Subjects: Engineering and technical science >> Metrology Subjects: Energy Science >> Survey of Energy Sources submitted time 2024-01-31
Abstract： This text mainly introduces the development and application of the remote online detection system of smart meters using "instrument cloud" high-precision computing. Firstly, the development process of traditional smart meter remote online detection system technology, as well as the limitations and challenges of these systems are introduced. Then, the origin of this topic is introduced, including the proposal of instrument virtualization technology in the "instrument cloud" environment, the research of instrument virtualization technology in the cloud computing environment, and the needs and challenges of the State Grid. This paper focuses on the development project of the remote online detection system of smart meters using "instrument cloud" high-precision computing, including the principle and application of instrument virtualization technology in the cloud computing environment, as well as the advantages and market prospects of the system. The development of this system will help solve the limitations and challenges of the traditional smart meter remote online detection system, improve the accuracy of measurement and intelligent diagnosis, and reduce the cost of the system, which is conducive to the popularization and application of the system.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Metrology Subjects: Engineering and technical science >> Technology of Instrument and Meter Subjects: Energy Science >> Survey of Energy Sources submitted time 2024-01-29
Abstract： This paper mainly introduces the remote automatic meter reading system technology of the State Grid in the early 90s of the 20th century, and with the introduction of electronic meters and smart meters, the local and remote communication technology has been rapidly updated, which has promoted the development of remote automatic meter reading system technology. From 2010 to 2018, the State Grid carried out the large-scale construction of the provincial power grid electricity information collection system, and invested a lot of money in the construction of collection equipment and user projects. By the end of 2018, the number of smart meters operated by the State Grid reached 458 million, and the user coverage rate of the electricity information collection system reached 99.87%. In the area of communication technology, the text refers to the development of local and remote communication methods. The local communication mode has undergone the evolution from narrowband powerline carrier communication technology to broadband powerline carrier communication technology, while the long-distance communication mode has successively adopted GPRS and 4G public network wireless communication. This paper also introduces the origin, development and gradual fading out of the market of narrowband CLC technology, as well as the rise and development of broadband CLC technology.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter Subjects: Engineering and technical science >> Metrology submitted time 2024-01-29
Abstract： This article mainly discusses the new challenges and changes faced by the metering technology and management of the power system under the development of the new power system. With the large-scale access of new energy, the new power system needs to adapt to this change, and the meter, as an important part of the power system, also needs corresponding improvement and transformation. The article mentions the current problems and challenges of the meter, including the sudden increase of grid connection metering points of distributed photovoltaic stations and the deepening research on the grid connection metering scheme of user distributed photovoltaic stations. In response to these problems, the article proposes some solutions, including using intelligent distribution network technology, promoting the performance and function improvement of smart meters. In addition, the article also mentions that there are some loopholes in the metering of distributed photovoltaic power generation systems, such as possible tampering of photovoltaic power generation meters. Therefore, intelligent monitoring and analysis solutions need to be adopted to improve the existing metering system, so as to improve the accuracy and reliability of metering. Overall, with the large-scale access of new energy, the development of the new power system will bring a series of challenges and changes. The meter industry needs to conduct in-depth research and actively respond to these challenges to promote the smooth development of the new power system.
Key words: New power systems Smart meters
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-28
Abstract： This text mainly introduces the differences in performance and functional design between imported 0.2S grid gateway meters and industrial and commercial household meters, and how these differences affect the development of domestic high-end meters. The article mentions the excellent performance and functions of these imported meters, such as high-precision metering, wide range overload range, voltage loop operation design, etc. These imported meters represent the highest level of technology in the design of international energy meters, so they have high application value. The article also discusses how to make domestic 0.2S multi-functional meters fully enter the main meter status of grid gate metering, and export to the international high-end meter market. This requires a comprehensive study of the differentiated design of the imported 0.2S level power grid gateway electric energy meter, evaluation of its technical level and the practicability of the current reference standard, and discussion and formulation of domestic enterprise standards for new multi-functional meters. The article also introduces in detail the technical details of the accuracy of the 0.2S inlet gate energy meter, the current range overload range, the voltage loop operation design, and the time-sharing rate. The de
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-28
Abstract： This paper mainly describes the development status of the State Grid intelligent IoT meter and the problems existing in the design and application of the embedded operating system. The article mentions that the bidding volume of the State Grid intelligent IoT meter has always been a difficulty in the development of the meter industry, and it is analyzed from many aspects. Among them, the smart IoT meter adopts an embedded operating system platform, but there are some problems and controversies, such as high cost, poor reliability, and low efficiency of general operating system architecture. At the same time, the price of smart IoT meters is also high, and the positioning of extended functions is not accurate enough. The article mentions the discussion of industry experts on the design and application of the embedded operating system of the smart IoT meter. Experts believe that there is not much innovation in the embedded operating system of the current smart IoT meter, and the use of a general operating system architecture may lead to problems such as low efficiency, inconvenient application and long-term operation reliability. In addition, the price of smart IoT meters is high, and the positioning of extended functions is not accurate enough, such as the selection of non-intrusive load identification and other functions may not be necessary in practical applications. During the discussion, the experts also put forward their views and suggestions on the embedded operating system of the State Grid Smart IoT Meter. They believe that the design of the operating system should be tailored to the characteristics and needs of the meter, rather than simply adopting a one-size-fits-all operating system. In addition, the reliability and compatibility of the operating system are also important factors to consider. The article also mentions that the discussion on the design and application of the embedded operating system of the State Grid smart IoT meter has continued, and emphasizes the importance of the reliability design of the operating system of the smart IoT meter. At the same time, the paper also mentions the discussion and suggestions of industry experts on the design and application of the embedded operating system of the smart IoT meter, as well as the importance of the reliability design of the operating system of the smart IoT meter.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-28
Abstract： We mainly discussed the demand protrusion and application status of low-voltage power line carrier automatic copying system (low-voltage PLC AMR). First, we analyze the factors driving the growth of the market demand for low-voltage PLC AMRs, including the need for power management, strategies for facing risks, and secure engineering funds. In terms of power management needs, the automatic meter reading system is an important part of modern, standardized and refined management, and the low-voltage PLC AMR is an effective solution to solve the problem of automatic meter reading in the low-voltage power grid. In the face of risks, the supplier already has the key technology research foundation and fault handling capabilities, formulated relevant standards, and has a short-range, wireless, ad hoc network automatic meter reading system as a technical supplement. In terms of project funds, the funds for power grid construction and technical transformation are sufficient, and the capital demand for low-voltage PLC AMR is relatively small. In terms of application status, there are estimated 9 million carrier energy meters in the country, accounting for 85% of the terminals of the local automatic meter reading system of the low-voltage power grid. Among them, some important achievements have been made in the application of low-voltage PLC AMR. Some companies have independently developed carrier communication chips and system solutions, which have improved technical performance and the success rate of one-time meter reading. At the same time, a variety of system solutions are also provided according to the needs of different regions. In addition, some companies have developed intelligent network control (SOC) carrier communication chips that use BPSK modulation and OSI Layer 7 protocol mode, with automatic routing algorithms and private network management functions. However, there are still some problems in low-voltage PLC AMR, such as the unstable success rate of one-time meter reading and the high cost of system construction. In addition, some technical problems need to be solved in the process of system construction and operation, such as carrier communication interference, communication protocol standardization, etc. Therefore, it is necessary to further promote the industrialization of low-voltage PLC AMR, strengthen technology research and development and standardization, improve system performance and stability, and reduce construction and operation costs. In short, low-voltage PLC AMR has advantages in power management, technology, risk response and financial security, and the market demand is gradually emerging. With the continuous improvement of technology and the accumulation of application experience, the application prospect of low-voltage PLC AMR will be broader
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-27
Abstract： This paper mainly introduces the development history, key technologies, industry prospects and related project research of high-voltage meters. The high-voltage meter is characterized by simplified structure, safety and reliability, and complete machine assessment, and has attracted the attention of the power sector and the meter industry as soon as it came out. However, due to the limitations of high-voltage metering standard traceability and certification, high-voltage meters have been in the trial and improvement stage. With the centralized bidding of the State Grid smart meter at a low price, it has triggered the transformation of high-end meter enterprises to change their development mode, and the high-voltage meter has become the topic of new technology metering product development. After 2011, the high-voltage meter has been complete from product design and production, measurement traceability to power grid application scheme, which is an important achievement in the development history of high-voltage meter. At the appraisal meeting of the project of "Sensor-type High-voltage Energy Meter and Its Calibration Technology" of Chongqing Power Grid, the high-voltage meter that passed the provincial scientific and technological achievement review became a metering product and entered the provincial power grid market for the first time for the measurement of the assessment of economic and technical indicators of the power grid. The measurement and traceability technology of high-voltage meter is also the focus of research, including the overall error verification platform of high-voltage metering device of Huazhong University of Science and Technology, the overall verification device of high-voltage electric energy of Zibo Institute of Metering and Protection, and the high-voltage (10KV) measurement standard device and on-site calibration device established by five units including China Metrology Institute. For the key technology and industry prospect of high-voltage meter, it is necessary to solve the problems of product specification limitation, how to standardize the diversification of structural design, performance evaluation method of high-voltage metering and data transmission scheme, product standards and verification procedures of high-quality high-voltage meter, and electromagnetic compatibility test of high-voltage meter. At the same time, it is also necessary to carry out in-depth development of precision, function and intelligence to meet the practical needs of smart grid construction.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-26
Abstract： This text mainly introduces the design and development of the power user power Internet of Things network based on the "ubiquitous connection" smart meter of the State Grid. The network is a two-way electricity flow trade settlement metering network with advanced interactive functions between the new smart distribution grid and users. The author pointed out in the article that the current State Grid smart meter is only named "smart", and it needs to be upgraded and developed by the "smart" function in order to become the State Grid "ubiquitous connection" smart meter, that is, it has two-way communication and gateway functions, and is used for two-way power flow trade settlement and measurement between the distribution network and users, and the advanced interactive function of transmitting water meter and gas meter measurement data. These advanced interactive functions are consistent with the international technical route for the development of smart meters, and it is recommended that State Grid carry out advanced design and development. In order to meet the needs of the construction of the State Grid's "ubiquitous power Internet of Things", the authors suggest that it is necessary to develop a power user power Internet of Things network based on the State Grid's "ubiquitous connection" smart meters. In view of the fact that residential users account for about 86% of the total number of users (470 million) in the State Grid business area, it is necessary to study the power Internet of Things network of residential users based on the "ubiquitous connection" smart meter of the State Grid in advance. It is composed of the State Grid "ubiquitous connection" smart meter, indoor IoT system, collection terminal, network command center and database: two-way power flow trade settlement and metering network. In addition, the text also mentions the framework design of the power Internet of Things network for residential users, the logic design within the Internet of Things network, and the connection with related systems outside the Internet of Things network. Among them, the network command center can be connected with the data platform, power marketing system, and distribution management system of the provincial power grid IoT management center. Overall, this text provides an important reference and guidance for the design and development of the power Internet of Things network for power users of State Grid's "ubiquitously connected" smart meters.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-26
Abstract： This paper introduces the overview of Canada's use of fundamental active power for electric energy metering and the issues raised in expert discussions. The installation of all meters in Canada in 2021 used fundamental power for electric energy metering, which has attracted international attention. Expert discussions involve issues such as the direction of harmonic active power, different views on fundamental power metering, harmonics generated by electronic switches, the reasonableness of fundamental active power metering, and the applicability of harmonic load power algorithms. The author believes that the use of fundamental active power metering is a compromise metering scheme that benefits both the grid and users. The domestic metering industry needs to gradually study and apply Canada's experience, and revise the IEC standard or national standard for active power meters to clearly list fundamental active power metering.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-26
Abstract： The article mainly focuses on the development and application of the operation system for smart meters in State Grid, discussing the key issues and challenges involved. It introduces the design defects of the new generation of smart meters, mainly due to the fact that their operating systems are developed by companies specialized in system development, lacking understanding of products and product reliability, which is not suitable for specialized power products such as smart meters, concentrators, and fusion terminals. The article also reviews the history of early smart meter application operating systems and points out that early operating systems were less suitable for smart meters due to their strong versatility and inability to form independent intellectual property rights. It delves into the origin, characteristics, common versions, and structure of Linux embedded operating systems, especially its kernel, Shell, file system, and applications. The article also quotes the requirements of State Grid's specifications for operating systems and application software, and explains in detail related terms and definitions such as management modules, plug-and-play events, POSIX standard interfaces, applications, and basic applications. It emphasizes that the application of embedded operating systems in smart meters is an innovation in meter design technology, and raises issues that need to be discussed for further development of the current smart meter operating system. Overall, this article provides a comprehensive and in-depth exploration of the development and application of the operation system for smart meters in State Grid, pointing out the key issues and challenges involved. This is of great significance for guiding the further development and application of smart meters.
Peer Review Status:Awaiting Review
Subjects: Engineering and technical science >> Technology of Instrument and Meter submitted time 2024-01-23
Abstract： The article mainly introduces the development of China's reactive power measurement technology, which involves some technical issues about reactive power meters. There are more and more non-fundamental wave components in the sine reactive power, but the reactive power standard should refer to the fundamental wave reactive power. The article also introduces some practical problems of domestic reactive power measurement technology, such as the increase of non-fundamental wave reactive power components caused by the application of power electronic devices, as well as the calibration of reactive power meters and the regulation of power electronic devices entering the grid.
Peer Review Status:Awaiting Review
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