电力系统自动化
電力繫統自動化
전력계통자동화
Automation of Electric Power Systems
2015年
20期
124-129
,共6页
广域后备保护%相量测量单元%故障搜索%故障点位置%最小二乘估计
廣域後備保護%相量測量單元%故障搜索%故障點位置%最小二乘估計
엄역후비보호%상량측량단원%고장수색%고장점위치%최소이승고계
wide-area backup protection%phasor measurement unit%fault searching%fault location%least squares estimation
提出了一种基于有限相量测量单元(PMU)的广域后备保护算法。它采用最小二乘法得到一个区域内各节点的电压估计值,利用这些电压估计值计算出本区域内每条线路的电流估计值,获得各线路电流实际值与估计值的残差值,进行排序,将电流残差值最大的两条线路列为疑似故障线路。利用多组 PMU 的电压故障分量,计算出疑似故障线路的多组线路故障点位置。利用故障点位置位于[0,1]之间等特性,给出了线路故障的判据。在 IEEE 14节点系统上的仿真实验结果表明,所提出的算法能够准确判断出故障线路,不受故障点位置、故障类型的影响。
提齣瞭一種基于有限相量測量單元(PMU)的廣域後備保護算法。它採用最小二乘法得到一箇區域內各節點的電壓估計值,利用這些電壓估計值計算齣本區域內每條線路的電流估計值,穫得各線路電流實際值與估計值的殘差值,進行排序,將電流殘差值最大的兩條線路列為疑似故障線路。利用多組 PMU 的電壓故障分量,計算齣疑似故障線路的多組線路故障點位置。利用故障點位置位于[0,1]之間等特性,給齣瞭線路故障的判據。在 IEEE 14節點繫統上的倣真實驗結果錶明,所提齣的算法能夠準確判斷齣故障線路,不受故障點位置、故障類型的影響。
제출료일충기우유한상량측량단원(PMU)적엄역후비보호산법。타채용최소이승법득도일개구역내각절점적전압고계치,이용저사전압고계치계산출본구역내매조선로적전류고계치,획득각선로전류실제치여고계치적잔차치,진행배서,장전류잔차치최대적량조선로렬위의사고장선로。이용다조 PMU 적전압고장분량,계산출의사고장선로적다조선로고장점위치。이용고장점위치위우[0,1]지간등특성,급출료선로고장적판거。재 IEEE 14절점계통상적방진실험결과표명,소제출적산법능구준학판단출고장선로,불수고장점위치、고장류형적영향。
A wide-area backup protection algorithm based on the limited phasor measurement units (PMUs) is studied.With one-bus spaced placement strategy for distributed PMUs,the bus voltage values of regional nodes are estimated by the least squares estimation method,and then the estimated line current values are calculated by estimated voltage values.After sorting the residuals of measured and estimated current values,the two lines with largest estimated values are taken as the suspected fault lines.The fault lines are determined by calculating multiple fault locations of suspected fault lines with the multiple groups of voltage fault components.Using the characteristics of fault locations lying between [0,1],the three kinds of line fault criterions are given.The simulation results on an IEEE 14-bus testing system illustrate that the proposed algorithm can accurately determine the fault lines and is not influenced by fault location and fault types.
