兼顾接入地区无功需求的风电场无功控制策略  

Wind Farm Reactive Power Control Strategy Considering Local Networks Demand

作　　者：朱凌志[1] 陈宁[1] 王伟[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《电力系统自动化》2009年第5期80-85,共6页Automation of Electric Power Systems

基　　金：国家"十一五"科技支撑计划资助项目(2008BAA14B04);国家电网公司重点项目(风电场控制系统关键技术研究与装置开发)~~

摘　　要：越来越多的风电并入电网后,对接入地区的电压影响也越来越大,为此,系统要求风电场能够对接入地区提供电压/无功支撑。文中提出了一种兼顾风电接入地区电压/无功需求的风电场无功控制方法。该方法以接入变电站低压侧电压作为控制电压,将风电场无功控制区分为正常控制区、异常控制区、紧急控制区和脱网控制区,并给出3种控制模式,即异常控制模式、紧急控制模式和故障控制模式。利用某一时段的控制电压平均值作为选择无功控制区的依据,并综合相邻2个时段的平均控制电压差值和接入变电站与风电场之间的通信情况选择无功控制模式。实际系统算例分析结果表明:所提出的方法能够合理调整风电场的输出无功功率,在很少的控制周期内将控制电压调整到合格范围,使一个测量周期内的平均电压合格,有效地为风电接入地区提供无功支持。With more wind power integrated into power grid, its impacts on the main system voltage are more significant. Grid companies require wind farm to provide supports to the main system voltage and reactive power control. Based on this, a reactive power compensation control method of wind farm is proposed considering the voltage and reactive power demand in the main system. The low voltage side of wind farm substation is chosen as controlled point. The reactive power control is divided into four sections, namely, normal control, abnormal control, urgent control and off-grid control. Accordingly, three control modes are given, including abnormal control mode, urgent control mode and fault control mode. In implementation, the average voltage in a specific period is used to classify the reactive power control sections. Further, the control mode selected according to the average voltage difference between two different periods and the communication between the substation and wind farm. An actual system is analyzed. The results show that the reactive power of wind farm can be quickly regulated to support the main system, maintaining the controlled voltage within limits in a measurement cycle.

关 键 词：风电接入地区 电压/无功需求 风电场 无功控制 灵敏度 

分 类 号：TM614[电气工程—电力系统及自动化] TM761