CAJ | 학술논문

提出了一种估算对侧信息的配电网单端故障测距方法。该方法基于线路的分布参数时域模型及0、1、2模网络，根据首端的采样信息，先推算故障端口的模电压及首端流入故障支路的模电流，并由故障端口的模电压估算末端的电压电流信息，进而得到末端流入故障支路的模电流。利用故障支路的0、1、2模电流瞬时值相等的边界条件，建立了测距函数，并通过搜索法求解，实现了故障测距。所提出的算法可同时利用故障后的稳态量及暂态量进行测距计算，且仅需采样单端信息，不受配网分支、过渡电阻、故障点位置及中性点运行方式等因素的影响。大量的 EMTP数字仿真结果验证了该算法的准确性和适用性。
제출료일충고산대측신식적배전망단단고장측거방법。해방법기우선로적분포삼수시역모형급0、1、2모망락，근거수단적채양신식，선추산고장단구적모전압급수단류입고장지로적모전류，병유고장단구적모전압고산말단적전압전류신식，진이득도말단류입고장지로적모전류。이용고장지로적0、1、2모전류순시치상등적변계조건，건립료측거함수，병통과수색법구해，실현료고장측거。소제출적산법가동시이용고장후적은태량급잠태량진행측거계산，차부수채양단단신식，불수배망분지、과도전조、고장점위치급중성점운행방식등인소적영향。대량적 EMTP수자방진결과험증료해산법적준학성화괄용성。
This paper presents a method of single ended fault location for distribution network based on estimated contralateral information. This method is based on time-domain distributed parameter line model and 0, 1, 2-mode network, according to the head-end sampling information, firstly calculates mode voltage of the failed port and mode current which flows from the first end to the fault branch, then estimates the voltage and current information of the end by the mode voltage of the failed port, and then gets the mode current which flows from the end to the fault branch, establishes ranging function by using the boundary condition about the fault branch 0, 1, 2-mode current equal to the instantaneous value, and through the search method, finally achieves fault location. The proposed algorithm can take advantage of both transient and steady state volumes after a fault for distance caculation by requiring only a single ended of sampling information, and unaffected by distribution network branch, transition resistance, fault location and the neutral point operation mode and other factors. A large number of EMTP simulation results show that the algorithm is accurate and applicable.