考虑小水电接入的微电网中风机电压频率协调控制研究

Study on voltage frequency coordinated control of micro grid wind turbine considering small hydropower access

分布式电源输出功率的波动性以及间歇性会给微电网的电压频率稳定带来挑战,尤其是当微电网以孤岛模式运行时影响更加明显。构建了小型水利发电的同步发电机模型,并在双馈风机的有功和无功控制的基础上提出了双馈风机的电压频率协调控制策略,通过引入f环节和d环节来抑制风机端电压的波动。基于PSCAD软件构建了微电网实际算例模型,对比分析了协调控制与传统控制下的微电网电压频率特性,验证了所提出控制策略的有效性。

The fuctuation and intermittence of the output power of distributed generation will bring challenges to the voltage and frequency stability of microgrid,especially when the microgrid operates in island mode.Based on the active and reactive power control of the doubly fed wind turbine,the voltage frequency coordinated control strategy of the doubly fed wind turbine is proposed,and the voltage fuctuation at the end of the wind turbine is restrained by introducing f links and d links.Based on PSCAD software,a practical example model of microgrid is built.The voltage frequency characteristics of microgrid under coordinated control and traditional control are compared and analyzed,which verifes the effectiveness of the control strategy.