CAJ | 학술논문

以降低广域保护范围的系统通信量为目的,提出了广域继电保护的故障区域自适应识别原则及实现方法。结合电力系统故障时序电压的分布特点,讨论了序电压分布受短线路、复故障和高阻接地等因素的影响。同时,实时监视电网广域范围内各母线的序电压,并进行排序计算,由专家系统根据排序结果进行疑似故障区域的分析,实现自适应识别故障区域。故障元件识别算法仅与故障区域内的智能电子设备通信,大幅降低了网络通信量。区别于以往广域继电保护的固定分区方法,系统通过监视故障启动母线的序电压识别故障区域,不受电网结构变化的影响,更易获得电网灵敏度较高的故障信息。仿真实验验证了该方法的有效性。
이강저엄역보호범위적계통통신량위목적,제출료엄역계전보호적고장구역자괄응식별원칙급실현방법。결합전력계통고장시서전압적분포특점,토론료서전압분포수단선로、복고장화고조접지등인소적영향。동시,실시감시전망엄역범위내각모선적서전압,병진행배서계산,유전가계통근거배서결과진행의사고장구역적분석,실현자괄응식별고장구역。고장원건식별산법부여고장구역내적지능전자설비통신,대폭강저료망락통신량。구별우이왕엄역계전보호적고정분구방법,계통통과감시고장계동모선적서전압식별고장구역,불수전망결구변화적영향,경역획득전망령민도교고적고장신식。방진실험험증료해방법적유효성。
In order to reduce communication traffic of wide area protection（WAP）,adaptive identification rule and its realization method for WAP are proposed.The effects of short line circuit,complex faults and high resistance grounding on sequence voltage distribution are discussed,combining sequence voltage distribution characteristics when fault occurs.Various bus sequence voltages in the wide power grid area are real-time monitored and ranking calculated by expert system,and fault region is analyzed on the basis of ranking results so as to realize the adaptive identification fault region.Communication traffic is dramatically reduced when system only communicates with intelligent electronic devices（IEDs） in the fault region.Different from the past WAP fixed partition,the method of adaptive identification of fault region for WAP is easier to get high sensitivity fault signal by monitoring the sequence voltage identification fault region of startup buses,meanwhile,the method is immune to structure change of power system.The simulation experiment verifies the validity of this method.