Implementation of a MOV computation method within a protection system simulation

Gopalakrishnan, A.; MacGregor, D.M.; Thor, T.

doi:10.1049/cp:20010175

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table II [9] vis-a-vis approach in [9]. It shows that the method described in [9] requires an effort that is approximately equal to seven short-circuit analysis runs. In contrast, the effort required by the proposed approach is equivalent to one run of the short-circuit analysis.…”

Section: Resultsmentioning

confidence: 99%

“…5 and 6) is validated with the traditional method of calculating fault current in phase coordinates [9] (Figs. 7 and 8).…”

Section: A Case 1: Mov Action Not Modelledmentioning

confidence: 99%

“…Coursol et al [7] and Mahseredjian et al [8] deal with the iterative approach to fault analysis for systems having series-compensated lines in sequence domain. Gopalakrishnan et al [9] have addressed this problem in three-phase domain wherein, at each iteration of short-circuit analysis, the following sparse threephase system of equations has to be solved: (3) 0885-8977/$25.00 © 2008 IEEE The fault matrix is updated at each iteration. While this approach is straightforward, it does not provide computational efficiency as the coefficient matrix in (3) has to be refactorized at each iteration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Computationally Efficient Methodology for Analysis of Faulted Power Systems With Series-Compensated Transmission Lines: A Phase Coordinate Approach

Gajbhiye

Gopi

Kulkarni

et al. 2008

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

Abstract-A capacitor in series with a transmission line is protected from overvoltage due to a large fault current by a nonlinear metal-oxide varistor (MOV) connected in parallel. Fault analysis, as well as the evaluation of performance of the transmission protection system, in the presence of MOV action becomes complex because 1) v-i characteristics of the MOV are nonlinear; 2) unsymmetrical MOV action for unsymmetrical faults will introduce coupling in sequence networks; and 3) MOV action will influence voltage or current inversion phenomenon. This paper presents a computationally efficient and simple methodology for fault analysis wherein the linear part of the network is modeled by an equivalent multiport Thevenin network. The proposed approach handles nonlinearity in fault analysis efficiently. It also provides an elegant approach to model unbalance in a network due to MOV action. The proposed approach can be used to determine relays prone to voltage or current inversion. Results on a real-life 716-bus Indian system illustrate the efficiency of the proposed approach.Index Terms-Current inversion, fault analysis, metal-oxide varistor (MOV), series capacitor, Thevenin equivalent circuit, voltage inversion.

show abstract

Section: Resultsmentioning

confidence: 99%

“…5 and 6) is validated with the traditional method of calculating fault current in phase coordinates [9] (Figs. 7 and 8).…”

Section: A Case 1: Mov Action Not Modelledmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Computationally Efficient Methodology for Analysis of Faulted Power Systems With Series-Compensated Transmission Lines: A Phase Coordinate Approach

Gajbhiye

Gopi

Kulkarni

et al. 2008

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

show abstract

“…The MOV is a non-linear resistor that limits the voltage across the capacitor during a fault condition. When the fault is cleared, the MOV allows almost instantaneous reinsertion of the capacitor into the transmission line [3].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Distance Relay Performance in Transmission Line Compensated by Series Capacitor Protected by MOV

AL-Kababjie¹,

ALNuaimy²,

AL³

2014

(AREJ)

View full text Add to dashboard Cite

The normal distance relay face many challenges in a series compensated transmission lines the distance relay may give incorrect decision. This paper present a digital distance relay designed by using wavelet transform (WT) to work with this compensated transmission lines. The relay have another features to recognize between fault and disturbance cases , classify fault types and giving the trip signal to circuit breaker in a time less than period quarter. The relay has been tested for both simulation cases and practically cases by simulation transmission lines board in the lab.

show abstract

Implementation of a MOV computation method within a protection system simulation

Cited by 2 publications

References 0 publications

Computationally Efficient Methodology for Analysis of Faulted Power Systems With Series-Compensated Transmission Lines: A Phase Coordinate Approach

Computationally Efficient Methodology for Analysis of Faulted Power Systems With Series-Compensated Transmission Lines: A Phase Coordinate Approach

Enhancement of Distance Relay Performance in Transmission Line Compensated by Series Capacitor Protected by MOV

Contact Info

Product

Resources

About