微网中投切并联电容器的过电压  

Overvoltage of a switching shunt capacitor in a microgrid

作　　者：陈水明[1] 余宏桥[1] 杨鹏程[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《清华大学学报（自然科学版）》2012年第3期351-355,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家重点实验室专项基金资助项目(50823001)

摘　　要：为研究微电网中投切电容器所引起的过电压,基于电磁暂态计算软件PSCAD/EMTDC搭建了微电网投切电容器仿真模型。模型主要包括3种不同类型的微电源(小型同步发电机、风力发电机及基于逆变设备的电源)以及并联电容器组。仿真研究了不同微电源运行情况下,电容器投切过程中不重燃、单相重燃和两相重燃3种情况下的过电压。仿真结果表明:不同类型的微电源所引起的过电压相差不大,电容器发生重燃时会产生较严重的过电压,最大过电压标幺值超过4.0。The overvoltage caused by a switching shunt capacitor in a mierngrid was analyzed using a simulation model based on PSCAD/EMTDC, including shunt capacitors and three different types of micro-sources （the small synchronous generator, a wind turbine generator based on an asynchronous generator, and a micro-source based on an inverter）. This study analyzes the effects of different micro-source types on the switching shunt capacitor overvohage and the overvohage level for no re-ignition, single-phase re ignition, and two-phase re ignition. The simulations show that the overvoltages caused by the different micro-sources are quite similar. The per-unit overvoltages for single-phase re-ignition and two-phase re ignition are likely to exceed 4.0.

关 键 词：微电网 微电源 投切电容器 过电压 

分 类 号：TM864[电气工程—高电压与绝缘技术]