Accurate fault location algorithm for double-circuit series compensated lines using a limited number of two-end synchronized measurements

Apostolopoulos, CA; Korres, GN

dc.contributor.author	Apostolopoulos, CA	en
dc.contributor.author	Korres, GN	en
dc.date.accessioned	2014-03-01T02:07:35Z
dc.date.available	2014-03-01T02:07:35Z
dc.date.issued	2012	en
dc.identifier.issn	01420615	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29582
dc.subject	ATP-EMTP	en
dc.subject	Distributed parameter line model	en
dc.subject	Double-circuit series compensated lines	en
dc.subject	Fault location	en
dc.subject	Synchronized phasor measurements	en
dc.subject.other	ATP-EMTP	en
dc.subject.other	Distributed parameter line model	en
dc.subject.other	Fault location algorithms	en
dc.subject.other	Fault point	en
dc.subject.other	Fault resistances	en
dc.subject.other	Fault types	en
dc.subject.other	Long line	en
dc.subject.other	Modal transformation	en
dc.subject.other	Mutual coupling	en
dc.subject.other	Sequence current	en
dc.subject.other	Series compensated lines	en
dc.subject.other	Series compensation	en
dc.subject.other	Shunt capacitance	en
dc.subject.other	Source impedance	en
dc.subject.other	Synchronized measurement	en
dc.subject.other	Synchronized phasor measurements	en
dc.subject.other	Voltage phasors	en
dc.subject.other	Zero sequence voltage	en
dc.subject.other	Zero sequences	en
dc.subject.other	Electric fault location	en
dc.subject.other	Iterative methods	en
dc.subject.other	Linear transformations	en
dc.subject.other	MATLAB	en
dc.subject.other	Phase measurement	en
dc.subject.other	Subroutines	en
dc.subject.other	Synchronization	en
dc.subject.other	Algorithms	en
dc.title	Accurate fault location algorithm for double-circuit series compensated lines using a limited number of two-end synchronized measurements	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijepes.2012.03.042	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijepes.2012.03.042	en
heal.publicationDate	2012	en
heal.abstract	This paper presents a new fault location algorithm for double-circuit series compensated lines based on synchronized phasor measurements. Only the sequence current phasors from both ends of the line and the sequence voltage phasors from one local end are taken as input, limiting thus the amount of data needed to be exchanged between the line terminals. In addition, the proposed algorithm does not utilize the model of the series compensation device, eliminating thus the errors resulting from modeling such devices. The new algorithm consists of three steps. In the first step, the fault type and the circuit(s) involved in the fault are determined using a synchrophasor-based fault type selection method. In the next step, the algorithm applies two subroutines designating for locating faults on particular line sections which are defined according to the series compensation placement along the line. In these subroutines, the sequence voltages and currents at the fault point are expressed with respect to the known sequence voltages and currents at the two measuring ends and the distance to fault. Then, using the fault boundary conditions that exist for a given fault type, the fault location is solved by an iterative method. Finally, in the last step a procedure for selecting the valid subroutine is applied. Due to zero sequence mutual coupling, it is not straightforward to express the zero sequence voltage and current at the fault point as a function of the zero sequence voltages and currents at the measuring ends and the distance to fault. To overcome this problem, a modal transformation matrix is introduced to obtain the modal networks, which are decoupled and can be analyzed independently. Based on distributed parameter line model, the proposed algorithm fully considers the effects of shunt capacitances and thus achieves superior locating accuracy, especially for long lines. Mutual coupling between circuits, source impedances and fault resistance does not influence the locating accuracy of the algorithm. Simulation results using ATP-EMTP and MATLAB demonstrate the effectiveness and accuracy of the proposed algorithm. © 2012 Elsevier Ltd. All rights reserved.	en
heal.journalName	International Journal of Electrical Power and Energy Systems	en
dc.identifier.doi	10.1016/j.ijepes.2012.03.042	en
dc.identifier.volume	42	en
dc.identifier.issue	1	en
dc.identifier.spage	495	en
dc.identifier.epage	507	en