摘要
低压配电网的电源电压常存在三相不平衡和谐波现象,通过脉宽调制(PWM)导致静止无功发生器(SVG)的直流侧电压出现波动,进而影响SVG的输出电流质量。采用预测电流与电源电压前馈相结合的控制方法,预测电流控制实现SVG无功电流的直接控制,电源电压前馈使SVG逆变电压中包含与电源电压相同的负序和谐波分量,通过扰动抵消保证了SVG输出电流波形的对称和正弦。实验结果表明了复合控制方法的有效性。
The power of the low voltage distribution network often exist unbalanced three-phase voltage and harmonicphenomenon, it will result in DC voltage fluctuations of static var generator（SVG） through the pulse width modulation（PWM） ,then affect the quality of the output current of SVG.The control method is based on the predictive currentand the power voltage feed-forward.Predictive current control achieve direct control of reactive current of SVG.Thepower vohage feed-forward control made the inverter voltage of SVG contains the same as the negative sequence andharmonics of power voltage.The symmetry and sinusoidal of the output current waveform of SVG is ensured by distur-bance offset.The experimental results show that the compound control method is valid.
出处
《电力电子技术》
CSCD
北大核心
2015年第7期33-35,共3页
Power Electronics
基金
陕西省重点学科建设专项基金(5X1301)
高等学校博士学科点专项科研基金(20126118110009)~~
关键词
静止无功发生器
预测电流
电源电压前馈
static var generator
predictive current
power voltage feed-forward
