CAJ | 학술논문

针对分布式电源多点接入的配电系统，提出了一种基于暂态极性保护原理的集成保护新方案。暂态极性比较保护是运用小波变换提取故障暂态高频信号的某一频段信息作为故障判断的依据，通过比较暂态高频信号的极性，迅速准确判断出故障位置。将暂态极性比较保护原理应用于配电网集成保护方案中，以母线作为载体构建集成保护单元，利用本地故障信息和相邻保护单元故障信息对母线各出线以及线路两端信号的极性进行比较，从而对母线故障和线路故障进行判断。与此同时，集成网络保护单元提取多点信息，对整体区域暂态信号极性进行综合比较，实现对故障的快速定位与隔离，为本地保护提供后备保护。最后，利用 MATLAB 软件对其进行了仿真分析，仿真结果验证了此保护方案的正确性和可行性。
침대분포식전원다점접입적배전계통，제출료일충기우잠태겁성보호원리적집성보호신방안。잠태겁성비교보호시운용소파변환제취고장잠태고빈신호적모일빈단신식작위고장판단적의거，통과비교잠태고빈신호적겁성，신속준학판단출고장위치。장잠태겁성비교보호원리응용우배전망집성보호방안중，이모선작위재체구건집성보호단원，이용본지고장신식화상린보호단원고장신식대모선각출선이급선로량단신호적겁성진행비교，종이대모선고장화선로고장진행판단。여차동시，집성망락보호단원제취다점신식，대정체구역잠태신호겁성진행종합비교，실현대고장적쾌속정위여격리，위본지보호제공후비보호。최후，이용 MATLAB 연건대기진행료방진분석，방진결과험증료차보호방안적정학성화가행성。
A new integrated protection scheme based on transient polarity comparison principle is proposed for the distribution system with multi distributed generators integrated.The transient polarity comparison consists in extracting the information in a certain frequency band of fault transient high frequency signals with wavelet transform as the basis of fault judgement to quickly and accurately judge the position of fault.The transient polarity comparison protection is applied to the integrated protection,in which the integrated protection unit is built based on the busbar.The local fault information and the fault information of adjacent protective units is used to compare the polarity of the lines out of the busbar to judge the busbar fault as well as the polarity at both ends of the line.Meanwhile the integrated network protection unit extracts multi-point information and makes a comprehensive comparison between the transient signal polarities of the whole area to realize fault isolation,rapid positioning and to provide backup protection for local protection.Finally,MATLAB is used to simulate the analysis,with the correctness and feasibility of the protection scheme verified by simulation results.