不对称电压条件下光伏逆变器的控制策略  

A Control Strategy of Photovoltaic Inverter Under Unbalanced Grid Voltage

作　　者：黄浩 徐永海 杨琳 何国庆[2] 郝木凯[2] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2014年第5期1277-1282,共6页Power System Technology

基　　金：国家自然科学基金项目(51277069);国家863高技术基金项目(2011AA05A301)~~

摘　　要：针对不对称电压条件下光伏逆变器的控制,在瞬时有功无功控制(instantaneous active–reactive control,IARC)和平均有功无功控制(average active reactive control,AARC)算法的基础上,提出一种有功无功灵活控制方法。该方法在电流参考值表达式中引入一个变量,通过对该变量的调节来抑制有功、无功功率波动和输出电流谐波。为获得较好的动态性能,仿真中采用静止坐标系下的比例谐振(proportional-resonant,PR)控制器实现正负序同时控制。仿真结果验证了所提策略的有效性。To implement the control of photovoltaic inverters under asymmetric grid voltage, based on the algorithms of instantaneous active- reactive control （IARC） and average active-reactive control （AARC） a flexible active and reactive power control strategy is proposed. In the proposed control strategy, a variable is led into the expression of current reference value, and through adjusting this variable the active and reactive power fluctuation as well as harmonics in the output current are suppressed. To attain a better dynamic performance, in the simulation of the proposed control strategy a proportional-resonant （PR） controller under rest frame is used to implement simultaneous control of positive and negative current components. The effectiveness of the proposed control strategy is validated by simulation results.

关 键 词：输出电流参考值 瞬时有功无功控制 平均有功无功控制 功率波动 比例谐振控制器 

分 类 号：TM721[电气工程—电力系统及自动化]