晶闸管变压式电容无功补偿方法的研究  

A Study about Method for Capacitor Reactive Power Compensation by Adjusting Voltage with Thyristors

作　　者：王建元[1] 马雪珂 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2015年第2期23-27,共5页Journal of Northeast Electric Power University

摘　　要：提出了一种通过晶闸管开关装置直接调节电容器两端电压以调节电容无功功率的方法和相应的原理及接线。同时提出了换级控制方法,分析了故障时产生的断态过电压,采用氧化锌压敏电阻过压保护后,重新对断态过电压进行了仿真。结果表明:补偿装置能多级、大范围调节容性无功,较之于其它快速补偿装置综合工程造价低,有望用于高压电网;装置故障时,会出现严重过电压,若过压保护动作后可使断态电压降低到允许范围内。A method for reactive compensation by using thyristor switching device to change the capacitor volt-age directly and the wiring of the principle are proposed. The tap-changing control method is analysised. State of off-state over-voltage is analyzed under fault. For fault condition,the simulation is redone with ZnO varistor over-voltage protection being adopted. Results show that the device can adjust capacitive reactive power in multi-stages and large scale. The project costs lower than other fast reactive compensation devices,and this e-quipment can be widely used in high voltage power network. When there is fault in the device,serious off-state over-voltage will occur. If the over-voltage protection acted,the off-state over-voltage is not high.

关 键 词：变压式电容无功补偿 晶闸管开关装置 换级调节 断态过电压 压敏电阻 

分 类 号：TM726[电气工程—电力系统及自动化]