Technique for contingency monitoring and voltage collapse prediction

Moghavvemi, Mahmoud; Omar, F.M.

doi:10.1049/ip-gtd:19982355

Cited by 252 publications

(123 citation statements)

References 5 publications

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“…Step 3: Calculate Gravitational force, gravitational constant and resultant forces among agents using (19), (20), and (21) respectively:…”

Section: Proposed Methods Hybrid Pso-gsa Techniquementioning

confidence: 99%

“…The LQP was proposed by A. Mohamed et al [20]. It was used in the comparison since this factor is more sensitive to a reactive power change.…”

Section: Line Stability Factor (Lpq)mentioning

confidence: 99%

“…For this purpose, three different stability indexes namely Fast Voltage Stability Index (FVSI) [18], Line stability index (Lmn 19] and Line Stability Factor(LPQ) [20] are used.…”

Section: Introductionmentioning

confidence: 99%

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Voltage stability analysis based on multi - objective optimal reactive power dispatch under various contingency

Amrane¹,

Elmaouhab²,

Boudour³

et al. 2017

ijeei

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An effective allocation of the reactive power in an electrical network aims generally to improve the voltage profile and to control transmission power losses. The present paper proposes the application of an efficient hybrid method combining two evolutionary search techniques. The technique is based on Particle Swarm Optimization (PSO) algorithm and Gravitational Search Algorithm (GSA) to solve the Optimal Reactive Power Planning (ORPP) problem for energy losses cost minimization of Algerian electric power system using the static Var Compensator devices (SVC). To ensure viability of the power system in contingency cases, various critical situations are simulated in order to prevent and prepare the power system to face such situations. The proposed program handles most changes that can occur in to the power system (heavy load, losing a large generator, losing a critical line …etc.). The proposed method is applied to solve the ORPP problem on the equivalent Algerian electric power system 114-bus. Moreover, the obtained results are compared, with PSO and GSA, separately. The results obtained by the proposed method show it's effectiveness for improving the reactive power planning problem. Index Terms: Optimal reactive power planning, Hybrid PSO-GSA, Stability Index, Equivalent Algerian electric power system. IntroductionThrough adjusting voltage generator, reactive power generator, transformer taps, and reactive power sources (capacitive or inductive banks, FACTS devices, etc.), the reactive power planning can reduce voltage deviations and active power losses. And in the same time maximizing voltage stability margin [1][2]. Since the generator reactive power, generator voltages, the transformer ratios and reactive power sources are continuous, the optimization problem is a nonconvex nonlinear programming problem (NLP). To solve such problem many conventional methods [3][4][5], like stochastic search methods [5][6][7][8][9][10][11] and hybrid conventional-stochastic methods [1], have been proposed.To insure the power system security, the OPRPP problem is associated with the contingency analysis problem. The contingency analysis, which is a well-known function in power system planning and operation [11][12][13][14][15], is used later to predict the contingencies which make system violated and rank the contingencies according to their relative severity. An outage of a transmission line, capacitor bank or transformer may lead to over loads in other branches and sudden system voltage rise or drop. This may lead to complete blackout. In this paper, three critical contingency cases are studied, these are: 1) Heavy load, 2) Lose a large Generator, 3) Lose a critical line. These cases are studied in a way to guarantee: i) The system stability after the increase of the power system load (voltage level, active and reactive power and load tap changer value are in the secure range), ii) The stability system maintainability after the outage of a large generator and a critical line, iii) a better location choice of the S...

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“…Step 3: Calculate Gravitational force, gravitational constant and resultant forces among agents using (19), (20), and (21) respectively:…”

Section: Proposed Methods Hybrid Pso-gsa Techniquementioning

confidence: 99%

“…The LQP was proposed by A. Mohamed et al [20]. It was used in the comparison since this factor is more sensitive to a reactive power change.…”

Section: Line Stability Factor (Lpq)mentioning

confidence: 99%

See 1 more Smart Citation

Voltage stability analysis based on multi - objective optimal reactive power dispatch under various contingency

Amrane¹,

Elmaouhab²,

Boudour³

et al. 2017

ijeei

View full text Add to dashboard Cite

show abstract

“…There are several approaches to estimate voltage security margin in a typical power system. Using different voltage security indices is a useful and conventional method for voltage security margin assessment (Moghavvemi, & Omar, 1998). Various indices for determination of the distance to the voltage collapse or instability has been proposed; active power margin based on P-V curves, reactive power margin based on Q-V curves and L mn index are some good examples of these indices (Kundur, 1994;Moghavvemi, & Omar, 1998).…”

Section: Voltage Stability Assessmentmentioning

confidence: 99%

“…Various indices for determination of the distance to the voltage collapse or instability has been proposed; active power margin based on P-V curves, reactive power margin based on Q-V curves and L mn index are some good examples of these indices (Kundur, 1994;Moghavvemi, & Omar, 1998). Moghavvemi et al in (Moghavvemi, & Omar, 1998) developed the L mn index based on the solution of the power flow equations. The L mn index is a quantitative measure to estimate the distance between actual state of the system and the stability limit.…”

Section: Voltage Stability Assessmentmentioning

confidence: 99%

An Economic Based Approach for Optimal and Secure Reactive Power Provision in Deregulated Environments

Kargarian¹,

Ebrahimi²,

Sarikhani³

2011

MAS

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In deregulated electricity markets, reactive power provision is one of the most important ancillary services which is vital for reliable and secure operation of the system. In all electricity markets, economic issues play an important role in market scheduling. This paper presents an algorithm to find optimal reactive power market schedule. The proposed algorithm seeks to minimize a novel three-component payment function which precisely considers economic issues in the market. Two first parts of this function are reactive power provision cost and transmission loss payment. Moreover, another important part of this payment function, which has not considered in the time of reactive power market clearing in literature, is transmission charge payment. As it is shown in simulation results, this term of the function can importantly impact on final reactive power market schedule and consequently on total market payment and final market schedule. Furthermore, due to significant impact of reactive power on system voltage stability, the algorithm tries to schedule reactive power market with an adequate voltage security margin. Sequential quadratic programming is employed to clear the algorithm which is a nonlinear constrained optimization problem. The proposed algorithm is applied on IEEE-24 bus test system with satisfactory results.

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Voltage instability detection using synchrophasor measurements: A review

Chappa¹,

Thakur

2020

Int Trans Electr Energ Syst

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Summary This article presents the concept of voltage instability and a critical review of the literature available for detecting voltage instability in the power system. Initially, the problem of voltage instability, the signification of P‐V, Q‐V curves, the effect of load models, on‐load tap changer (OLTC), and over‐excitation limits of generators on voltage instability are lucidly explained. A very brief description of conventional methodologies for voltage instability detection is also presented. This literature review mainly focuses on methodologies based on synchrophasor measurements including both local and global measurements. These methodologies' feasibility for real‐time application has been investigated. The indices that are compared for instability detection may serve as an introduction to measurement‐based voltage instability detection methodologies. The measurement‐based indices that are analyzed and compared are mainly based on the concept of Thevenin parameters estimation, generator equivalent models, nodal reactive power loss concept, and apparent power difference criteria. Thus, this paper attempted to compile all the work reported so far for voltage instability detection using synchrophasor measurements and for each methodology merits and demerits are lucidly discussed and are tabulated.

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Technique for contingency monitoring and voltage collapse prediction

Cited by 252 publications

References 5 publications

Voltage stability analysis based on multi - objective optimal reactive power dispatch under various contingency

Voltage stability analysis based on multi - objective optimal reactive power dispatch under various contingency

An Economic Based Approach for Optimal and Secure Reactive Power Provision in Deregulated Environments

Voltage instability detection using synchrophasor measurements: A review

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