摘要
研究了三相四线统一电能质量调节器(UPQC)系统的串联变流器控制策略,该策略将串联变流器控制为正弦电流源,通过在静止ABC坐标系下对串联变流器三相输入电流分别进行独立控制,实现了电网输入电压非正弦、不平衡条件下的三相输入电流的基本平衡与正弦,且直流母线2组电容电压稳定平衡。实验结果表明该控制策略是有效的,为三相四线UPQC系统对电网侧电能质量的改善及其并联变流器的正常运行提供了可靠的保障。
The control strategies for series converter of three-phase four-wire unified power quality conditioner （UPQC） are investigated. With the help of the individual control of the input currents of the series converter in the ABC coordinates to transfer the series converter into a sinusoidal PWM current source, the three-phase currents under the non-sinusoidal and unbalanced supply voltages can he sinusoidal and balanced waveform. The voltage unbalance between the two group capacitors connected into the direct current bus is also eliminated. Experimental results verify the validity of the control strategies in governing the power quality and in improving the operation performances of parallel converter.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第6期57-60,共4页
Automation of Electric Power Systems
