大功率并网变流器不平衡控制策略对比  

Comparison of Control Strategies for High-power Converter under Unbalanced Grid Voltage Conditions

作　　者：张平[1] 洪丹[1] 孙素娟[1] 陶婧娴 朱玲[1] 张侃[1] 

机构地区：[1]国电南瑞科技股份有限公司,江苏南京210061

出　　处：《工业控制计算机》2014年第4期10-12,15,共4页Industrial Control Computer

摘　　要：正负序双坐标系下双比例积分(PI)控制和正序旋转坐标下比例积分谐振(PIR)控制方法是当前最受关注的风电并网变流器不平衡控制方法。基于上述两种电流内环控制方法,以实际大功率并网变流器需求为出发点,结合电流平衡、有功平衡和消除直流电压波动等3种功率控制目标,仿真对比了不同控制组合下并网变流器不平衡控制运行效果,最后给出实际工程试验中大功率变流器不平衡运行实测波形加以验证。Two of the most concerned current control methods for converters under unbalanced voltage conditions are dual pro- portional integral （PI） control in positive ＆ negative sequences rotating coordinates and proportional integral resonant （PIR） control in positive-sequence rotating coordinate.Based on these two current control methods,combined with 3 different control objectives for practical application,balanced currents,smooth active power and smooth DC-link voltage,6 control strategies are studied in this paper,whose performances are compared on simulation results.

关 键 词：电网电压不平衡 并网变流器 正负序双坐标系双PI控制 PIR控制 

分 类 号：TM46[电气工程—电器]