快速响应磁控电抗器抑制特高压操作过电压研究  

UHV switching overvoltage suppression by quick response magnetically controlled reactor

作　　者：邢海瀛[1] 陈柏超[1] 张亚迪[1] 田翠华[1] 袁佳歆[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2009年第1期15-18,共4页Electric Power Automation Equipment

摘　　要：针对高电压等级电网的过电压限制与无功补偿存在矛盾的问题,提出了一种大容量并具有快速响应能力的磁控电抗器的设计方案。磁控电抗器的本体采用单相双绕组结构,保证了运行可靠性;接入电网的三相电抗器组的工作绕组以星形联结,中性点接小电抗,控制绕组为三角形联结以减小输出谐波;通过对低压控制回路直流电压的调节实现对电抗器输出容量的控制。提出2种励磁方式实现了磁控电抗器响应速度的大幅提高;也可采用控制绕组短接的方法实现电抗器容量的突增,以限制线路的操作过电压水平。应用一条1000 kV特高压线路模型,对采用常规并联高压电抗器和磁控高压电抗器时对三相对称合闸过电压的限制效果进行了计算分析,结果表明应用快速响应磁控电抗器可以对特高压线路操作过电压进行有效限制。For both over-voltage suppression and reactive power compensation in high voltage power grid, MCR（Magnetieally Controlled Reactor） with big capacity and quick response is developed, which has single -phase dual-winding structure to ensure its stable operation. The work windings of the three-phase MCR group are connected in star type with small central reactor, and its control windings are connected in triangle type to reduce harmonics. Its capacity is controlled by adjusting the I）（2 voltage of control windings. Two different excitation ways are used to improve its response speed and the short-circuit of control winding is used to greatly increase its capacity and effectively suppress over-voltage. The effect of MCR on three -phase symmetric close-switch over-voltage is compared with that of conventional shunt reactor for a typical 1 000 kV UHV line model, result shows the UHV switching over-voltage is effectively suppressed by the quick response MCR.

关 键 词：磁控电抗器 特高压 操作过电压 过电压抑制 快速响应 

分 类 号：TM47[电气工程—电器]