逆变器与SVC共同参与的光伏电站无功协调控制研究

Research on Coordinated Control of Reactive Power in Photovoltaic Power Station with Participation of Inverfers and SVC

摘要:

光伏电站无功配置方案不考虑逆变器的无功输出能力，存在投资成本偏大、补偿特性不理想等问题。针对目 前光伏电站无功补偿方面存在的问题，研究逆变器的无功输出能力，论证了其参与无功调节的可行性，提出适用于电 压时变特性的逆变器与 SVC 共同参与下的光伏电站无功控制策略，以提高光伏系统的暂态稳定性，实现光伏电站无 功补偿实用性与经济性的统一。

Abstract:

The reactive power output capacity of reactive power allocation scheme for photovoltaic power station without considering the problems of inverters has a large investment cost and unsatisfactory compensation performance． So aiming at the problems of reactive power compensation in current photovoltaic power stations，the reactive power output capacity of the inverters is studied，its feasibility in reactive power regulation is demonstrated，and the reactive power control strategy is proposed for photovoltaic power station with the participation of inverters and SVC which has the voltage time － varying characteristics so as to improve the transient stability of photovoltaic system and realize the unification of reactive power compensation in applicability and economy for photovoltaic power station．