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.
出处
《电网技术》
EI
CSCD
北大核心
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)~~
