Double-Circuit Transmission-Line Fault Location With the Availability of Limited Voltage Measurements

Abstract

This paper presents a new approach for locating short-circuit faults on a double-circuit transmission line. Various algorithms have been proposed previously that usually require measurements recorded from one or two buses of the faulted line. However, such measurements may not always be available in some scenarios, rendering inapplicability of existing methods. To complement existing methods, this paper proposes a novel, general fault-location method by harnessing voltage measurements at one or more buses, which may not be taken from the faulted line. The bus impedance matrix of each sequence network with the addition of a fictitious bus at the fault point can be derived as a function of the fault location. The fault location can then be obtained based on the bus impedance matrix and voltage measurements. The distributed parameter line model is utilized. The network data are assumed to be available so that the bus impedance matrix can be constructed. When multiple voltage measurements are available, an optimal estimator capable of identifying bad measurement data is also proposed for enhanced fault location. Since field data are not available at this time, simulated data are utilized for evaluation studies, and quite accurate results have been achieved.Index Terms-Bus impedance matrix, distributed parameter line model, double-circuit transmission line, fault location, optimal estimator.

Locating Faults on Untransposed, Meshed Transmission Networks Using a Limited Number of Synchrophasor Measurements

“…Considering all the possible fault locations, resistances and fault types, it is not feasible to create such a huge database for relatively large-scale power systems. For some other methods [27] and [28], not more than two measurements can be used at the same time, unless a nonlinear optimization problem is solved [29]. A major disadvantage of the mentioned wide-area fault location methods is that bad data detection techniques cannot be readily incorporated in them.…”

Traveling‐wave‐based protection of parallel transmission lines using Teager energy operator and fuzzy systems

“…In addition to (10), the polarity of the first and the second current TWs should be considered. If the first and the second TWs have opposite polarities, then the second TW is reflected from the remote bus and has then arrived at the relay location.…”

“…If the first and the second TWs have opposite polarities, then the second TW is reflected from the remote bus and has then arrived at the relay location. Therefore, the fault has occurred in the second half of the transmission line and the fault location is 'l-x', where 'l' is the length of the protected transmission line and 'x' is the value which is calculated by (10). Otherwise, if they have the same polarities, the second TW is reflected from the fault point and has then arrived at the relay location, resulting in the occurrence of the fault in the first half of the transmission line.…”

Transmission line relay mis-operation detection based on time-synchronized field data

“…Different fault analysis methods have been proposed in the literature either as a separate fault detection, classification, and location functions or as a complete fault analysis tool [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. A group of methods are developed, considering line impedance calculation [8][9][10][11][12][13][14][15][16][17], while several others are based on high-frequency transients, traveling waves, and wavelet-based methods [18][19][20][21].…”

“…A group of methods are developed, considering line impedance calculation [8][9][10][11][12][13][14][15][16][17], while several others are based on high-frequency transients, traveling waves, and wavelet-based methods [18][19][20][21]. Regardless of different schemes presented in these works, the advantages of high-frequency based methods are the high accuracy and fast decision making.…”