A WAMS/PMU-based fault location technique

An effective fault location technique for transmission grids using phasor measurement units

“…The result of (15) and (19) will be a complex number because D ik1 is a complex number. The real part of D ik1 is very small and the imaginary part of x ik is approximately equal to zero, therefore, the real part of x ik can be identified as the fault location.…”

“…For a DLG fault and a three-phase fault, the fault location function can be also solved as (19). The result of (15) and (19) will be a complex number because D ik1 is a complex number.…”

“…The phase voltages U u and currents I u are then decoupled into sequence components using symmetrical transformation, and then the symmetrical components are used as the input data for further computations. According to (15), (19), (A.12), and (A.16), the fault locations x ik and x kj is calculated.…”

“…With the development of phasor measurement units (PMUs) techniques and mature applications in the power system, significant literature already exists which deals with application of phasor measurements to system monitoring, protection, and control [10][11][12][13][14][15][16]. Simultaneously, several adaptive fault detection/location technique based on PMUs for an EHV/ UHV transmission line have been presented [17][18][19]. However, in order to achieve high accuracy in fault location, PMUs installed on every bus were required in these PMUs-based algorithms.…”

Research Progress of Complex Electric Power Systems: Graph Theory Approach

“…may change significantly. In our researches, after some accidents, utilizing real-time measurements of phasor measurement unit (PMU) (Phadke & Thorp, 2008;Wang et al, 2007;Rakpenthai et al, 2005;Peng et al, 2006), basing on graph theory and multivariate statistical analysis theory, we are using mainly Breadthfirst search (BFS), Depth-first search (DFS) and cluster analysis technology (Arifin & Asano, 2006;Otazu & Pujol, 2006;Park & Baik, 2006;Tola et al, 2008;Zhao et al, 2008;Templ et al, 2008), and seeking after for the uniform laws of electrical quantities' marked changes. Then we can carry out fast and exact analysis of fault component.…”