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

Thasnas, Natakorn; Siritaratiwat, Apirat

doi:10.1155/2019/2609235

Cited by 19 publications

(31 citation statements)

References 37 publications

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“…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. In [34], four line VSIs were introduced as the objective function in the line outage contingency condition. The maximum loadability values at the voltage collapse point were also demonstrated.…”

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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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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“…Kessel [12] developed L-index which is a simple method and has been used as the indicator of the voltage stability of the transmission line. It will give online monitoring of voltage sensitivity at all load buses with sufficient accuracy.…”

Section: Methodology To Identify Weak Busmentioning

confidence: 99%

Machine Learning Algorithm Based Static VAR Compensator to Enhance Voltage Stability of Multi-machine Power System

Machavarapu¹,

Rao²,

Rao³

2019

MMEP

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A novel Extreme learning Machine (ELM) algorithm based tuning of the parameters of the SVC FACTS controller was implemented in order to control voltage at various buses over a wide range. The ELM algorithm is a non-iterative method which forecasts the parameters of SVC FACTS controller quickly and effectively while Back Propagation Neural Network (BPNN) algorithm is an iterative method which takes a long time for training as well prediction of parameters. The load perturbation is one of the nonlinear disturbances which is considered to investigate the operational capability of the control methodology. Standard IEEE 5 and 30 bus systems are considered as test systems and operation of two models of SVC observed with the BPNN and ELM controllers. The weakest bus is identified using L-Index method which is the optimal location of the SVC FACTS. Results show that the novel ELM method expeditiously and efficiently tunes the parameters of the SVC FACTS controller online such that the voltage regulated to desired value when there is a perturbation in load.

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“…The P-Vcurve, as indicated in Figure 2, represents a non-linear relationship between the active power and voltage. It is used to locate the maximum allowable safe loading margin (in MW) from the operating point to the critical voltage for a specific load bus(es) in a power network [45][46][47]. The PV-curve can be calculated by using a series of power-flow solutions for different load levels.…”

Section: Drawing Of the P-vcurvementioning

confidence: 99%

A Systematic PVQV-Curves Approach for Investigating the Impact of Solar Photovoltaic-Generator in Power System Using PowerWorld Simulator

Muhammed

Rawa

2020

Energies

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With the recent growing interest in renewable energy integrated power systems across the globe for the various economic and environmental benefits, it is also significant to consider their influence on voltage stability in power systems. Therefore, this paper reports the static voltage stability impact of solar photovoltaic generation on power networks using PowerWorld simulator power-voltage (P–V)- and voltage-reactive power (V–Q)-curves to investigate the renewable energy generator model performance suitability. The impact of varying power factor control and static voltage droop control of a photovoltaic plant on the maximum generated power, threshold voltage profile and reactive power marginal loading has been examined. Besides, the concept of percentage change in voltage-power sensitivity has been systematically utilized to determine the optimal location for the solar photovoltaic generator on the power grid and the feasible penetrations have been defined for selected system buses. From the simulation results it can be concluded that in a steady-state analysis of the grid integrated power system the effects of power factor (pf) control and voltage droop control should be considered by power grid engineers for effective system operation and, equally, the application of percentage change in voltage-power sensitivity should be extended to real networks to determine the best positions for multiple installations of renewable energy resources.

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

Cited by 19 publications

References 37 publications

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

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

Machine Learning Algorithm Based Static VAR Compensator to Enhance Voltage Stability of Multi-machine Power System

A Systematic PVQV-Curves Approach for Investigating the Impact of Solar Photovoltaic-Generator in Power System Using PowerWorld Simulator

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