CAJ | 학술논문

随着分布式电源在配电网中渗透率的提高，现有的一些故障定位算法可能失效，对此，提出了一种基于最小电压偏差向量2-范数的故障定位算法。首先，根据配电网各节点注入的等效故障电流计算各电源处电压变化值，并比较各电源处电压变化测量值与电压变化计算值之差，搜索差值向量最小2-范数对应的故障电流注入节点从而确定故障区段的第一个节点，其次，通过该节点两侧电压差值变化确定故障区段的另一节点，实现故障区段定位。最后，利用 IEEE 34节点三相不平衡系统进行了故障定位分析，结果表明算法物理意义明确、计算过程简单且具有良好的故障定位准确度。
수착분포식전원재배전망중삼투솔적제고，현유적일사고장정위산법가능실효，대차，제출료일충기우최소전압편차향량2-범수적고장정위산법。수선，근거배전망각절점주입적등효고장전류계산각전원처전압변화치，병비교각전원처전압변화측량치여전압변화계산치지차，수색차치향량최소2-범수대응적고장전류주입절점종이학정고장구단적제일개절점，기차，통과해절점량측전압차치변화학정고장구단적령일절점，실현고장구단정위。최후，이용 IEEE 34절점삼상불평형계통진행료고장정위분석，결과표명산법물리의의명학、계산과정간단차구유량호적고장정위준학도。
With the increasing interconnection of distributed generators in distribution networks,some of the existing fault location algorithms may fail.A fault location method based on the minimum 2-norm of voltage deviation vectors is proposed. Firstly,the fault current is injected into each bus of the distribution network model to calculate the voltage variation of the power source.Secondly,the difference between measured voltage variation and calculated voltage variation is analyzed,and the fault current injected bus corresponding to the minimum difference is searched and determined as the first bus of the fault section.Finally,the other bus of the fault section is determined according to the variation trend.An IEEE 34-bus system is chosen to verify the algorithm,the results showing that the algorithm has clear physical meaning,simple calculation process and good fault location accuracy.The more distributed generation is connected,the better fault location accuracy will be.