双馈式风电场多阶段无功电压控制策略  

Multi-stage Reactive Power and Voltage Control Strategy of DFIG Based on Wind Farms

作　　者：盛四清[1] 陈安[1] 杨少波[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《现代电力》2015年第5期89-94,共6页Modern Electric Power

摘　　要：为了应对大规模风电接入电网引起的电压稳定问题,提出了一种新型的多阶段无功电压协调控制策略。该策略首先基于风功率预测数据对电容器组的投切进行提前优化;稳态运行时,通过分析双馈风力机的PQ关系曲线,优先调整风电机组无功出力以实现对风电场的无功调控;电网故障时充分发挥静止无功补偿器的调节能力,并在故障切除后限制其出力以避免电压过冲,从而整体上实现无功电压的协调控制。最后以某一风电场系统的仿真结果验证了上述策略的有效性和可行性。In order to solve the voltage stability issue caused by large-scale wind farm integrated power grid, a new multi- stage coordinated control strategy of reactive power and voltage is proposed. The switching scheme of capacitor bank is pre-per- formed based on the predicted wind .power firstly. Then in steady state, the reactive power of wind farm is regulated to control the reactive power and voltage by analyzing the relation between active power and reactive power of DFIG. In addition, SVC is controlled to make full use of its reactive power capabili- ty in fault state, and the voltage overshoot is avoided by limited power output after fault, which show the effectiveness of coor- dinated control reactive power and voltage overall. In the end, the validity and feasibility of proposed scheme are verified by simulation results of a practical wind farm.

关 键 词：双馈感应发电机 电容器组投切 静止无功补偿器 协调控制 多阶段 

分 类 号：TM614[电气工程—电力系统及自动化]