A comparison of the effectiveness of voltage stability indices in an optimal power flow

Khunkitti, Sirote; Premrudeepreechacharn, S.; Chatthaworn, Rongrit; Thasnas, Natakorn; Khunkitti, Pirat; Siritaratiwat, Apirat; Watson, N.R.

doi:10.1002/tee.22836

Cited by 11 publications

(16 citation statements)

References 37 publications

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“…(i) Case 1: the minimization of the generation cost is the objective function as shown in equation (6). e coefficients of generation cost are defined as in [33]. is study uses the results of this case as the base case to compare the performance with proposed approaches.…”

Section: Resultsmentioning

confidence: 99%

“…Line voltage stability index (LVSI), operating cost, and emission effects were proposed as the objective function of stochastic optimal power flow problem with the presence of uncertain wind power generations [32]. Five voltage stability indices (VSIs), i.e., L-index, fast voltage stability index (FVSI), line stability index (L mn ), online voltage stability index (LVSI), and voltage collapse proximity indicator (VCPI), were employed in VSC-OPF to compare their performances [33].…”

Section: Introductionmentioning

confidence: 99%

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Implementation of Static Line Voltage Stability Indices for Improved Static Voltage Stability Margin

Thasnas

Siritaratiwat

2019

Journal of Electrical and Computer Engineering

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Nowadays, the changes of economic, environment, and regulations are forcing the electric utilities to operate systems at maximum capacity. Therefore, the operation and control of power system to improve the system stability has been receiving a great deal of attention. This paper presents an approach for enhancing the static voltage stability margin and reducing the power losses of the system with voltage security-constrained optimal power flow (VSC-OPF) that is based on static line voltage stability indices. The control approaches incorporate the voltage stability criteria into the conventional OPF. The minimization of the summation of fast voltage stability index (FVSI), line stability index (Lmn), and line voltage stability index (LVSI) is used as the objective functions. The performance and effectiveness of the proposed control approaches are evaluated on the standard IEEE 30-bus, 57-bus, and 118-bus test systems under normal and contingency conditions. The comparison analysis is carried out with different cases including minimization of generation cost. The proposed control approaches indicate the promising results and offer efficient countermeasures against the voltage instability of the system.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Implementation of Static Line Voltage Stability Indices for Improved Static Voltage Stability Margin

Thasnas

Siritaratiwat

2019

Journal of Electrical and Computer Engineering

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“…However, only VCPI was investigated in this work although there are many successfully proposed VSIs in the literature, and only small systems were tested which could not verify the performance of the VSI for large practical systems. In [33], several VSIs were selected as the objective function to compare the effectiveness of the VSIs. This work investigated the enhancement of the voltage stability by observing the maximum loadability before the voltage collapse point; however, the line outage contingency condition where the systems mostly require voltage stability enhancement have not been investigated.…”

Section: Many Techniques and Methods In The Literature Have Beenmentioning

confidence: 99%

Power System Voltage Stability Enhancement Based on Line Voltage Stability Indices in Heavily Loaded and Line Outage Contingency Situations

Khunkitti¹,

Premrudeepreechacharn²,

Siritaratiwat³

et al. 2020

International Journal of Engineering Research and Technology

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This paper presents power system voltage stability enhancement using line voltage stability indices based on an optimal power flow (OPF) problem in heavily loaded and line outage contingency situations. Voltage stability indices (VSIs) are widespread indicators determining the proximity of a system to voltage collapse, and operators can protect the voltage collapse before it happens. The values of VSIs are generally between 0 (no load condition) and 1 (voltage collapse). By limiting the threshold value of VSIs, operators can move a system to a secure point when the system tends to collapse. Moreover, the values of VSIs can also be minimized in order to improve voltage stability of a system. Therefore, in the OPF problem, the VSIs are proposed as part of the constraint to restrict the threshold of the VSIs and as the objective function to improve the voltage stability. Three line VSIs consisting of Lmn, VCPI and FVSI are compared in terms of transmission line loss reduction and voltage stability improvement in the heavily loaded and line outage contingency situations. Salp swarm algorithm (SSA) is employed to solve the OPF problem. The performance of the VSIs are investigated in the IEEE 30-bus and 118-bus systems. The simulation results show the enhancement of the voltage stability and reduction of loss, especially when using VSIs as the objective function.

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“…Moreover, due to the ever-increasing power demand, the modern power system has been operating close to its power transfer capability limit that leads to stressed conditions of the system. Occasionally, a small change in the operating conditions results in system instability due to a dip in the voltage level that may cause blackouts or brownouts of the system as similar events have been witnessed in North America, Canada, India, Pakistan, and so on over the last few decades [ 7 , 8 ] Therefore, solving the OPF problem is most important to assess the voltage stability of the system.…”

Section: Introductionmentioning

confidence: 99%

Marine predators algorithm for solving single-objective optimal power flow

et al. 2021

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This study presents a nature-inspired, and metaheuristic-based Marine predator algorithm (MPA) for solving the optimal power flow (OPF) problem. The significant insight of MPA is the widespread foraging strategy called the Levy walk and Brownian movements in ocean predators, including the optimal encounter rate policy in biological interaction among predators and prey which make the method to solve the real-world engineering problems of OPF. The OPF problem has been extensively used in power system operation, planning, and management over a long time. In this work, the MPA is analyzed to solve the single-objective OPF problem considering the fuel cost, real and reactive power loss, voltage deviation, and voltage stability enhancement index as objective functions. The proposed method is tested on IEEE 30-bus test system and the obtained results by the proposed method are compared with recent literature studies. The acquired results demonstrate that the proposed method is quite competitive among the nature-inspired optimization techniques reported in the literature.

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A comparison of the effectiveness of voltage stability indices in an optimal power flow

Cited by 11 publications

References 37 publications

Implementation of Static Line Voltage Stability Indices for Improved Static Voltage Stability Margin

Implementation of Static Line Voltage Stability Indices for Improved Static Voltage Stability Margin

Power System Voltage Stability Enhancement Based on Line Voltage Stability Indices in Heavily Loaded and Line Outage Contingency Situations

Marine predators algorithm for solving single-objective optimal power flow

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