Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：固态变压器作为能源互联网的核心设备具有电压等级转换和隔离的功能， 可以有效地整合分布式可再生能源，但模块级联 H 桥型固态变压器也存在各个 H 桥模 块之间的均压问题。本文首先研究了单相任意单元数级联 H 桥固态变压器的 SVPWM 及其电压平衡控制原理，提出一种固态变压器电压环控制一个 H 桥直流母线电压，然 后通过在 SVPWM 中增加一个新控制环控制其他 H 桥的矢量脉冲宽度，从而使其他 H 桥电压跟随的控制策略来实现各个 H 桥均压的目的。最后通过仿真验证了所提控制策 略的正确性。
Subjects: Mechanical Engineering >> Other Disciplines of Mechanical Engineering submitted time 2018-06-15 Cooperative journals: 《电气工程学报》
Abstract： Solid-state transformer has the function of conversion and isolation in different voltage grade as the important equipment of energy internet, and it can integrate distributed renewable energy effectively, but also has some imbalance problem in voltage. At first，the SVPWM of single-phase solid-state transformer cascaded by arbitrary number of H bridge and the principle of voltage balance control are studied in the paper. Then, a control strategy which control one of H bridge's voltage through solid-state transformer voltage control loop is proposed, and this strategy control other H bridge's voltage to follow master H bridge by adding a new control loop in the SVPWM which control the vector pulse width of each slave H bridge. Finally, the simulation verifies the correctness of strategy proposed.
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