风力发电对双电源快速切换的影响  

Influence of wind power generation on fast transfer of double power supply

作　　者：卜繁多 梁志珊[1] 夏鹏程[1] 

机构地区：[1]中国石油大学(北京),北京102249

出　　处：《电力系统保护与控制》2014年第3期1-8,共8页Power System Protection and Control

基　　金：中国石油大学(北京)前瞻导向基金项目(批准号:2010QZ03)资助;中国石油天然气股份有限公司基金项目(KY-11-104)

摘　　要：风力发电的大量接入使配电网成为有源网络,影响了快速切换装置的正确动作。以含有风力发电(永磁同步发电机组和双馈异步发电机组)的某石化厂6 kV终端变电站为例,利用电力系统分析软件包EDSA建立仿真模型,分析风力发电对快速切换装置的影响。仿真结果表明:含有永磁同步发电机组的变电站在发出的无功功率小于负载所需的无功功率时,有利于进行快速切换,而在发出的无功功率大于负荷所需的无功功率时,会出现电压升高的情况,很有可能超过设备的保护定值,需要修改现有的切换判据;含有双馈异步发电机组的变电站无论发电机组发出的有功功率大于或小于负荷所需的有功功率,均不利于进行快速切换。针对含有风力发电的变电站提出了改进的快速切换判据:对于含有永磁同步发电机组的变电站增加了现有判据中对母线电压上限的约束,对于含有双馈异步风力发电机组的变电站扩大了现有判据中对母线电压下限的约束。The large-scale access of wind power generation to the distribution network makes it become the active network and affects the correct action of the fast transfer devices. This paper takes a 6 kV terminal substation of a petrochemical plant with the wind power generation connected for example, builds a simulation model by the EDSA software and analyzes the influence on fast transfer caused by the wind power generation （permanent magnet synchronous generators and double fed induction generator）. The simulation results show that it＇s helpful for fast transfer while the reactive power of permanent magnet synchronous generators is smaller than that of the loads. However, it needs to modify the available transfer criterion because the bus voltage will grow up or may exceed the protection setting value of the device when the reactive power of permanent magnet synchronous generators is larger than that of the loads. The situation that the active power of double fed induction generators is larger or smaller than that of the loads is not helpful for fast transfer. Meanwhile, this paper presents an improved fast transfer criterion for the power system with the wind power generation： adding the upper limit＇s constraint of bus voltage in the available transfer criterion for the power system with the permanent magnet synchronous generators; and enlarging the lower limit＇s constraint of bus voltage in the available transfer criterion for the power system with the double fed induction generator.

关 键 词：风力发电 永磁同步发电机组 双馈异步发电机组 快速切换 切换判据 

分 类 号：TM762.1[电气工程—电力系统及自动化]