A new single end wideband impedance based fault location scheme for distribution systems

Abstract

This paper proposes an improved impedance based fault location scheme based on system analysis at non-fundamental frequencies. The fault is treated as a voltage source that injects high frequency components into the system and the analysis is carried out using these injected components. The proposed method only requires local measurements at the substation and therefore is classified as a single end method. The new contribution is that the proposed method uses the distributed parameter line model to account for inductive and capacitive effects of the line. It has been evaluated on the IEEE 34-bus feeder which is based on an actual distribution system which has the typical features such as non-homogeneous feeder sections, asymmetrical line configurations, unbalanced loads and single and three-phase laterals. The fault point, fault resistance and fault inception angle have been varied to check their influence on the accuracy of the method. The simulation results demonstrate the accuracy of the proposed method where for most cases, the error in fault location is less than 50 m.

New Fault-Location Algorithm for Series-Compensated Double-Circuit Transmission Line

“…The derivation process is similar to subroutine Ⅰ, and the fault distance estimation equation is given in (27). 6 6 6…”

“…To determine the faulted location of transmission lines, several fault-location algorithms are proposed [2][3][4][5][6][7][8][9][10][11][12]. These algorithms can be divided into two categories.…”

“…These algorithms can be divided into two categories. In the first category, single-terminal voltage and current are used in fault-location algorithm [2][3][4][5][6]. In these algorithms, it may be difficult to accurately determine the locations of the faults, since these algorithms are usually valid under approximate assumptions, in the absence of data from the other terminal, existing algorithms generally have accuracy problems.…”

Traveling wave based fault location for power transmission lines using morphological filters and clarke modal components

“…Therefore, a rapid and precise fault location would be of great interest to power utility companies that would be able to restore quickly and accurately the well-functioning of transmission lines by fixing the problems identified at the fault points [1]. Among the most used methods in fault localization, there is the one based on the fault impedance and it uses essentially the RMS values of voltages and currents at the fundamental frequency [2][3][4][5][6]. This method is simple, but its precision depends on the assumptions made about the relationship between the RMS values of voltages and currents at the fault point and those at the end of the transmission line.…”

Localização de Faltas em Redes Elétricas Radiais Utilizando Algoritmo De Seleção Clonal

“…Incrementa-se a maior dificuldade de inspecioná-las quando comparada com as linhas dos sistemas de subtransmissão e distribuição. No entanto, com a redução de custos de equipamentos de proteção e medição, a localização de faltas nestes dois últimos sistemas também tem sido alvo de estudos (Aboshady et al, 2019;Nunes et al, 2019), uma vez que muitas concessionárias operam em um ambiente desregulamentado e de elevada concorrência, razão pela qual a satisfação dos clientes quanto à qualidade e continuidade do fornecimento de energia elétrica é uma necessidade do mercado (Saha et al, 2009). Frente à complexidade das redes elétricas de distribuição de energia elétrica, que pode variar de acordo com o número de linhas, equipamentos conectados (relés, transformadores, medidores, chaves seccionadoras, etc.)…”