摘要
在含TCSC型故障限流器(thyristor-controlled series capacitor-based fault current limiter,TCSC-FCL)线路距离保护的整定中,通常将TCSC-FCL作为电抗器处理,忽略其动态阻抗特性,可能导致保护拒动/误动或速动性不足。针对上述问题,建立TCSC-FCL动态阻抗分析模型,对TCSC-FCL独有的首周波旁路模式下的阻抗时变特性进行分析,研究其从串补模式切换到限流模式的动态阻抗变化过程,提出TCSC-FCL动态阻抗特性函数表示方法,并提出基于动态偏移阻抗圆的距离保护整定策略,以消除TCSC-FCL动态阻抗特性对距离保护动作性能的影响。建立含TCSC-FCL的典型输电网模型,验证上述动态特性函数表示方法以及距离保护整定策略的正确性。
In the line distance protection setting, the thyristor-controlled series capacitor type fault current limiter （TCSC-FCL） is usually treated as a reactor, ignoring the dynamic impedance characteristics, which may lead to operation failure/maloperation or slow response. To solving the problem above, TCSC-FCL dynamic impedance analysis model was established. Accounting for the bypass mode of TCSC-FCL in the first cycle, the time-varying characteristics of TCSC-FCL during the process from series compensation mode to limit dynamic mode was analyzed. Then the paper proposed the function expression of dynamic impedance characteristics of TCSC-FCL, and put forward distance protection setting strategy based on dynamic offset impedance circle, in order to eliminate the influence of TCSC-FCL dynamic impedance characteristics to the distance protection action. By establishing typical grid model including TCSC-FCL, the correctness of dynamic feature’s function expression and the distance protection setting strategy are proved.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第8期2279-2289,共11页
Proceedings of the CSEE
基金
国家自然科学基金项目(51577077)
国家电网公司科技项目(SGTYHT/15-JS-191)~~
