CAJ | 학술논문

基于电流原理的继电保护是电力系统应用最广泛的保护设备。对于母线保护、站域保护以及广域电流保护而言，当电流测量回路异常时容易引发保护误动或拒动，其后果将造成区域性大面积停电，是电力系统应极力预防的高风险事件。有必要采取在线监测措施对电流测量回路本身的完好性进行检测以确保此类保护的正确动作。为此定义了广义变比，提出通过广义变比在线辨识监测保护电流测量回路的异常或故障的新方法。该法根据基尔霍夫电流定律建立广义变比的辨识矩阵，并采用奇异值分解法进行求解，将计算结果与该回路标准变比进行比较，即可及时发现电流测量回路是否出现异常。仿真分析验证了所提方法的有效性。
기우전류원리적계전보호시전력계통응용최엄범적보호설비。대우모선보호、참역보호이급엄역전류보호이언，당전류측량회로이상시용역인발보호오동혹거동，기후과장조성구역성대면적정전，시전력계통응겁력예방적고풍험사건。유필요채취재선감측조시대전류측량회로본신적완호성진행검측이학보차류보호적정학동작。위차정의료엄의변비，제출통과엄의변비재선변식감측보호전류측량회로적이상혹고장적신방법。해법근거기이곽부전류정률건립엄의변비적변식구진，병채용기이치분해법진행구해，장계산결과여해회로표준변비진행비교，즉가급시발현전류측량회로시부출현이상。방진분석험증료소제방법적유효성。
The relay protection devices that based on the current principle are the most widely used in power system. For bus protection, substation-area protection and wide area protection, it is easy to cause protection false-operation or fail-operation when current measurement circuit is abnormal. The operations can result in regional blackout, which is the high-risk incident that power system should be vigorously prevented. Online monitoring measures are necessary to be taken to detect the own integrity of current measurement circuit to ensure correct operation of such protection. So this paper defined the current measurement circuit generalized ratio, and proposed a new way to monitor the fault or abnormity of current measurement circuit though the online identification of generalized ratio. The method established an identification matrix of generalized ratio according to Kirchhoff Current Law, and solved the generalized ratio by the singular value decomposition. Compared generalized ratio with standard ratio can timely discover the abnormity of current measurement circuit. Simulation analysis demonstrates the effectiveness of the proposed method.