CAJ | 학술논문

接地网支路电阻的可测性是由网络的拓扑结构和可及节点分布决定的,与支路的电阻值无关。由此提出了一种适用于接地网腐蚀诊断的可测性分析方法,利用网络变换先消去不可及节点,然后反向推导,逐步确定各条支路的可测性。在此基础上提出了诊断可信度指标,指示各条支路诊断结果的可信程度,并构造了可信度计算公式。诊断结果验证了这个方法的有效性,并且可信度指标能够较好地反映诊断结果的误差情况。可测性分析和可信度指标可以给工程人员的实际诊断工作提供有价值的信息。
접지망지로전조적가측성시유망락적탁복결구화가급절점분포결정적,여지로적전조치무관。유차제출료일충괄용우접지망부식진단적가측성분석방법,이용망락변환선소거불가급절점,연후반향추도,축보학정각조지로적가측성。재차기출상제출료진단가신도지표,지시각조지로진단결과적가신정도,병구조료가신도계산공식。진단결과험증료저개방법적유효성,병차가신도지표능구교호지반영진단결과적오차정황。가측성분석화가신도지표가이급공정인원적실제진단공작제공유개치적신식。
Testability of grounding grids is decided by network topology and reachable nodes’ location rather than resistance. In order to research the testability, a new method which applied to corrosion diagnosis is presented. In this method, unreachable nodes are eliminated by network transformation, and then the testability is confirmed gradually in reverse direction. Creditability index is firstly proposed to indicate the credibility of diagnosis result, and the calculating formula is also established. Simulation results show the validity of this approach, and the creditability index can well reflect the errors of diagnosis results. Testability results and creditability index provide valuable information for the actual diagnosis work.