利用光伏发电优化功率控制提高电网暂态稳定  

Improvement of grid transient stability by optimizing power regulation of photovoltaic power generation

作　　者：付文雯[1] 曾成碧[1] 张嘉琪 刘耀远 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]国家电网四川成都供电公司,四川成都610065

出　　处：《电源技术》2017年第5期786-789,共4页Chinese Journal of Power Sources

基　　金：四川省教育厅自然科学项目(13ZA0096);四川省科技支撑项目(2014GZ0069)

摘　　要：随着光伏发电装机容量的逐步提高,光伏高渗透率的区域电网的稳定性面临挑战。因此进行了光伏电站的功率控制研究,在故障暂态过程中,合理减少光伏系统有功输出,保证光伏直流侧稳定,提高光伏逆变器的无功输出能力,以实现电网电压稳定和网内机组功角特性的改善。以美国西部联合电力系统(WSCC)3机9节点系统接入光伏电站为例,验证了所提控制策略能有效提高电网内机组的暂态稳定能力,有利于光伏发电的安全并网,并改善了输出性能。As photovoltaic installed capacity increases, the stability of regional grid with high permeability photovoltaic faces challenge. The power control strategy of photovoltaic power plants was studied. In the transient course of fault, the active power output of photovoltaic systems was reasonably reduced; the stability of PV DC side was ensured; the reactive power output capability of photovoltaic inverter was improved, achieving the grid voltage stability and improvement of power angle characteristics of the power generator unit. Taking WSCC 3 machine 9-bus system access PV power plant as example, the proposed control strategy can effectively improve the transient stability of power unit, the safety of PV connected to the grid and the output performance.

关 键 词：光伏并网 暂态稳定 MPPT控制 PQ控制 无功支撑 

分 类 号：TM464[电气工程—电器]