Abstract:
Installation of fault current limiter (FCL) in transmission lines can effectively suppress the short-circuit current level and thus reduce the breaking capacity requirement from HV circuit breakers. However, it may also result in more severe breaking conditions for circuit breakers, because of changing lines parameter. For different running mode of comprehensive FCL and for its different location in transmission line, a expression has been presented for describing the relationship between the rate of rise of recovery voltage (RRRV) of circuit breakers and current limit factor, series compensation degree, and short-line fault distance. Based on the presented expression, the systematical calculations and analyses have been carried out to reveal the influence of every principal parameter on RRRV, and the corresponding results are compared with those from previous publications available, showing effectivity of the analyzing methodology presented in this work. The results given in this work provide the basical and theoretical reference for the parameter optimization of comprehensive FCL and for reliable selection of the breaking characteristics of HV circuit breakers.