一种新型静止无功补偿装置

New type static var compensator

针对在高压和超高压电网的静止无功补偿中,晶闸管投切电容器(TSC)受晶闸管自身参数的影响,使设备复杂、造价高等的弊端,研制一种新型静止无功补偿装置。该装置由高压可控电抗器和控制系统2部分组成,采用磁阀式结构设计和低压直流控制技术。通过对装置伏安特性、控制特性、过渡过程波形试验,结果表明:可控电抗器的伏安特性近似线性,能有效地消除可控电抗器运行时的谐波,克服了饱和时可控电抗器铁心损耗大的弊端。装置可随着高压输电线路传输功率的变化自动平滑地调节自身容量,规避了TSC高压控制的风险,扩大了电流的调整范围。

In HV ＆ EHV power grid,TSC（Thyristor Switched Capacitor）,affected by own parameters,makes the device complex and expensive. A new type SVC（Static Var Compensator） is designed,which consists of the high voltage controllable shunt reactors and control system,and applies the magnetic valve structure and low voltage DC control technology. The volt- ampere characteristic,control characteristic and transient waveforms are tested. Results show that the volt-ampere characteristic of adjustable shunt reactors is approximately linear,which eliminates the harmonics during operation and the large iron-core loss during saturation. Its capacity adapts to the variation of transmission power,which helps to avoid risk of TSC HV control and enlarge the adjustment range of current.