Article

Application of Six-Sequence Fault Components in Fault Location for Joint Parallel Transmission Line

Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
Tsinghua Science & Technology 04/2005; 10(2):247-253. DOI: 10.1016/S1007-0214(05)70062-6

ABSTRACT A new fault location method based on six-sequence fault components was developed for parallel lines based on the fault analysis of a joint parallel transmission line. In the six-sequence fault network, the ratio of the root-mean square value of the fault current from two terminals is the function of the line impedance, the system impedance, and the fault distance away from the buses. A fault location equation is given to relate these factors. For extremely long transmission lines, the distributed capacitance is divided by the fault point and allocated to the two terminals of the transmission line in a lumped parameter to eliminate the influence of the distributed capacitance on the location accuracy. There is no limit on fault type and synchronization of the sampling data. Simulation results show that the location accuracy is high with an average error about 2%, and it is not influenced by factors such as the load current, the operating mode of the power system, or the fault resistance.

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    • "A fault detection/location algorithm that considers arcing faults is proposed in [14] [15]. Fault location schemes for aged power cables [7], two-and three-terminal transmission lines [13], double-circuit transmission lines [16] [17], overhead line combined with an underground power cable [9] and transposed/untransposed transmission lines [10] are also reported. To determine the fault location, these classical algorithms need the line impedance parameters and the system TEs at the line terminals to be known. "
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    ABSTRACT: This paper presents an adaptive fault location algorithm for power system networks based on synchronized phasor measurements obtained by Phasor Measurement Units (PMUs). To enhance its accuracy, the proposed algorithm is made to be independent of any data that shall be provided by the electric utility. The proposed algorithm requires three different sets of pre-fault voltage and current phasor measurements at both terminals of the faulty line to be obtained through PMUs. The three sets of local PMU measurements at each terminal are used for online calculation of the respective Thevenin's equivalent (TE). Using the method of multiple measurements with linear regression (MMLR), the three sets of PMU measurements are also employed for online calculation of the transmission line parameters. Online determination of the TEs and line parameters ensures avoiding any possible mismatch with the actual parameters due to system loading and other environmental conditions. The proposed method is applied to a 115 kV system selected from the Saudi Electricity Company (SEC) network. The simulation results obtained using PSCAD/EMTDC and MATLABreveal that the proposed algorithm is highly accurate and independent of fault type, fault location, fault resistance, fault inception angle and pre-fault loading.
    Electric Power Systems Research 03/2014; 108:153–163. DOI:10.1016/j.epsr.2013.10.013 · 1.60 Impact Factor
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    • "The algorithm models the line with its distributed parameters and uses the theory of mode transformation. In [40], a fault location algorithm in joint parallel lines is proposed using six-sequence fault components in fault location. Although the algorithm is not influenced by factors such as the load current, the operating mode of the power system, or the fault resistance, the associated percentage error can reach up to 2%. "
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    • "The algorithm models the line with its distributed parameters and uses the theory of mode transformation. In [40], a fault location algorithm in joint parallel lines is proposed using six-sequence fault components in fault location. Although the algorithm is not influenced by factors such as the load current, the operating mode of the power system, or the fault resistance, the associated percentage error can reach up to 2%. "
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    ABSTRACT: This paper presents a comprehensive survey on transmission and distribution fault location algorithms that utilize synchronized measurements. Algorithms based on two-end synchronized measurements and fault location algorithms on three-terminal and multiterminal lines are reviewed. Series capacitors equipped with metal oxide varistors (MOVs), when set on a transmission line, create certain problems for line fault locators and, therefore, fault location on series-compensated lines is discussed. The paper reports the work carried out on adaptive fault location algorithms aiming at achieving better fault location accuracy. Work associated with fault location on power system networks, although limited, is also summarized. Additionally, the nonstandard high-frequency-related fault location techniques based on wavelet transform are discussed. Finally, the paper highlights the area for future research.
    The Scientific World Journal 02/2014; 2014:845307. DOI:10.1155/2014/845307 · 1.73 Impact Factor
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