分布式光伏并网电压和功率因数协调控制策略  

Voltage and Power Factor Coordination Control for Distributed Photovoltaic Integration

作　　者：赵伟然 汪海蛟[1] 李光辉[1] 何国庆[1] 孙健[2] ZHAO Weiran;WANG Haijiao;LI Guanghui;HE Guoqing;SUN Jian(State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems (China Electric Power Research Institute), Beijing 100192, China;State Grid Beijing Electric Power Company, Beijing 100031, China)

机构地区：[1]新能源与储能运行控制国家重点实验室(中国电力科学研究院),北京100192 [2]国网北京市电力公司,北京100031

出　　处：《电力工程技术》2017年第6期20-26,共7页Electric Power Engineering Technology

基　　金：国家重点研发计划(2017YFB0903300);国家电网公司科技项目(分布式光伏发电集群运行调控关键技术研究)

摘　　要：为应对分布式光伏并网引起的电压越限和功率因数超标问题,提出了一种改进的分布式光伏并网电压和功率因数协调控制策略。该策略包括电压控制策略和功率因数控制策略,电压控制策略采用优先控制光伏发出的无功功率,当无功容量不足时降低有功功率的方法调节并网点电压;功率因数控制策略控制光伏发出的无功功率以调节用户考核点功率因数。针对2种控制策略分别设计了比例积分控制器,最后通过算例,在RT-LAB仿真环境中验证了所提控制策略的有效性。To deal with the problem of voltage and power factor exceeding limits caused by distributed PV integration,an improved voltage and power factor coordination control strategy of distributed PV is proposed.The strategy includes voltage control strategy and power factor control strategy,voltage control strategy regulates the voltage of integration by controlling PV reactive power firstly and reducing PV reactive power when PV reactive power reach lower limit,power factor control strategy regulates reactive power of PV and power factor of the point of common coupling,proportional integral controller is designed for two control strategies.Finally,an example is given to demonstrate the effectiveness of the proposed control strategy in a RT-LAB simulation environment.

关 键 词：分布式光伏 电压控制 功率因数控制 比例积分控制 

分 类 号：TM615[电气工程—电力系统及自动化] TM712