Optimal location of SVC for improvement in voltage stability of a power system under normal and contingency condition

Choudekar, Pallavi; Sinha, Samarth; Siddiqui, Anwar Shahzad

doi:10.1007/s13198-017-0601-0

Cited by 16 publications

(13 citation statements)

References 7 publications

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“…However, in real systems, P and Q may flow in opposite directions. In such conditions, the above‐mentioned indicators may not properly evaluate the stability status, which has not considered in research works . To clarify this problem, in the network shown in Figure , the L index is calculated in the following operating points: Case P Load = 600 MW, Q Load = 200 MVAr. In this case, since P and Q are flowing from bus 1 to the other one, bus 1 is considered as the SB.…”

Section: Assessment Of Line Indices Against Different Directions Of Pmentioning

confidence: 99%

“…In this regard, these indicators may seem to be a proper tool for voltage stability assessment. Nevertheless, in the sequel, it will be shown that these indices have a major drawback, which is not considered in the literature . To explain this drawback, consider the simple network shown in Figure A, which includes three transmission lines connected in series.…”

Section: Improved Lsz Indicatorsmentioning

confidence: 99%

“…In such conditions, the abovementioned indicators may not properly evaluate the stability status, which has not considered in research works. 35,[48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] To clarify this problem, in the network shown in Figure 2, the L index is calculated in the following operating points: In this case, since P and Q are flowing from bus 1 to the other one, bus 1 is considered as the SB. Also, the value of L index is 0.51, which is shown in Table 4.…”

Section: Assessment Of Line Indices Against Different Directions Ofmentioning

confidence: 99%

“…Nevertheless, in the sequel, it will be shown that these indices have a major drawback, which is not considered in the literature. 35,[48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84] To explain this drawback, consider the simple network shown in Figure 13A, which includes three transmission lines connected in series. In this network, the maximum transferable power is 67 as follows: When P max passes through the transmission corridor, it is expected that the line indices calculated for line 2 (or two other ones) reach to their critical threshold to show the proximity of the operating point to stability boundary.…”

Section: Figure 12mentioning

confidence: 99%

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A comprehensive assessment to propose an improved line stability index

Yari

Khoshkhoo

2019

Int Trans Electr Energ Syst

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Summary So far, several line stability indices have been introduced and used for evaluating voltage stability status of power systems. The objective of this paper is to propose a comprehensive assessment of these indices and also to propose a modified line stability index to accurately assess the stability status of networks in different situations. To this purpose, the performance of several line indices at different conditions is analyzed. Also, to categorize system states to normal, alert, and emergency, proper thresholds are proposed for these indices. It will be shown that although line indices are able to properly assess the stability of a two‐bus system, they cannot detect the stability status in real networks. Therefore, a modified index has been proposed, which can accurately assess the stability status of power systems. The static and dynamic simulation results performed in the Institute of Electrical and Electronics Engineer (IEEE) 39‐ and 118‐bus test systems verify the performance of the proposed index.

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Section: Assessment Of Line Indices Against Different Directions Of Pmentioning

confidence: 99%

Section: Improved Lsz Indicatorsmentioning

confidence: 99%

Section: Assessment Of Line Indices Against Different Directions Ofmentioning

confidence: 99%

Section: Figure 12mentioning

confidence: 99%

See 2 more Smart Citations

A comprehensive assessment to propose an improved line stability index

Yari

Khoshkhoo

2019

Int Trans Electr Energ Syst

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“…Intelligent algorithm like GA based fuzzy are used for multi-objective optimization for placement of TCSC and SVC for controlling congestion in transmission network [11].Optimal power flow using differential evolution and hybrid PSO is carried out and placement of TCSC, TCPS(Thyristor Controlled Phase Shifter) has been done to improve power flow [12] [13] Authors used Non dominated Sorting Particle Swarm Optimization (NSPSO) is used for optimal location of TCSC and SVC under N-1 contingency state for multi-objective optimization [14]. Placement of SVC in normal and contingency for improving voltage stability is discussed [15].…”

Section: Literature Reviewmentioning

confidence: 99%

Transmission Congestion Management and Techno Economical Analysis using Placement of TCSC

2019

IJITEE

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Congestion management is a major problem in deregulated power system. Congestion leads to increase in transmission line loading, increases losses and reducing transmission efficiency. It also leads to increase in congestion cost and thus affects technical as well as economical parameters. Research work is carried out under single line critical contingency condition. Critical contingency is found out by overall performance index (OPI). Optimal Power Flow (OPF) is carried out and objective is to maximize social welfare. Thyristor controlled series compensator is used to improve power flow, thus it reduces congestion and improves techno-economical parameters. Optimal location of Thyristor controlled series compensator (TCSC) is found out by LMP difference method.

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