CAJ | 학술논문

为实现环网方向保护整定配合起始点的合理选择,给出一种基于保护协调配合性能的最小断点集选取方法.该方法基于继电保护整定配合的阶梯原则,定义了评价环网各级阶段式方向保护整体协调配合性能的测度指标,通过测度指标定量评价最小断点集问题各组可行解的优劣性,进而实现最小断点集问题多组可行解的合理选取;同时给出了基于图论中最长基本路径概念的测度指标计算方法.算例仿真表明,所提方法能够避免最小断点集选取不当引起的保护配合级数过多和动作时限过长问题.
위실현배망방향보호정정배합기시점적합리선택,급출일충기우보호협조배합성능적최소단점집선취방법.해방법기우계전보호정정배합적계제원칙,정의료평개배망각급계단식방향보호정체협조배합성능적측도지표,통과측도지표정량평개최소단점집문제각조가행해적우렬성,진이실현최소단점집문제다조가행해적합리선취;동시급출료기우도론중최장기본로경개념적측도지표계산방법.산례방진표명,소제방법능구피면최소단점집선취불당인기적보호배합급수과다화동작시한과장문제.
To obtain the reasonable starting points for setting directional protections in loop grid, the method for selecting minimum break point set is studied based on the coordination performance of protections. According to the step principle for setting protection relay, the measurement index is defined to evaluate the coordination performance of directional protections of transmission lines in loop grid, and the effectiveness of each feasible solution of minimum break point set problem can be described by its measurement index value, and the feasible solution with the best measurement index can be further selected as the minimum break point set. Based on the concept of the longest path in graph theory, the method for calculating measurement index is also given. Simulation results show that the proposed method can avoid the inappropriate coordination of protections caused by the unreasonable selection of minimum break point set.