智能电网三相H桥级联SVG的矢量控制及仿真
Vector Control and Simulation of Three-Phase Cascade H Bridge SVG in Smart Grid
摘要:
为发挥智能电网的巨大优势，简便有效的动态无功功率补偿至关重要。无辅助电源的三相H桥级联SVG以其优越的性能成为无功补偿的首选装置。本文对其控制原理做了详细解析，设计了较为实用的直流侧电压和交流侧电流双闭环的矢量控制系统，并深入浅出地描述无功电流的动态补偿过程。仿真结果证明：此系统可根据电网的无功补偿需求，对输出无功电流实现无静差调节，其稳态和动态性能均能符合要求。
Abstract:
Simple and effective dynamic var power compensation is very important to the smart grid. Cascade H bridge SVG without auxiliary power supply has become the preferred device in var compensation because of its good performance. So this thesis analyzes its control theory in detail. Then a vector control system with double closed loop of DC side voltage and AC side current is designed. Based on it, the dynamic compensation process of var current is also described. The simulation results verify that this system can adjust output var current without static difference according to the grid’s requirement of compensating var power. Both its stable and dynamic performance can meet the requirements.
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