Multi-criteria contingency ranking method for voltage stability

Dester, Mauricio; Castro, Carlos A.

doi:10.1016/j.epsr.2008.05.023

Cited by 19 publications

(4 citation statements)

References 14 publications

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“…Therefore from sin(δ i -δ j ) >0 we can conclude that (δ i -δ j ) >0 or δ i >δ j which means that in a lossless transmission system, active power always flows from the point with larger phase angle to the point with smaller phase angle [6]. Let consider the example of two bus system [7]in Fig. 1 From the load flow calculation, if the load on bus increase continuously up to the maximum value for active power transfer before unstable point, phasor angle difference also will increase on the bus 2 (bus 1 as reference) as shown in the Fig.…”

Section: Proposed Methodsmentioning

confidence: 99%

“…For Case 2 (Security Assessment/Contingencies) as a important tasks to analyze static voltage stability of power systems is the contingency analysis. To select which line to be outage, first the most severe outage of line from contingency ranking (connecting bus 1 to bus 2) was chosen [7]. The scenario of contingency done by removed the line when the load at bus 4 reached 35 MW.…”

Section: Case Studiesmentioning

confidence: 99%

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A New Method for Online Assessment of Voltage Stability

Innah

Hiyama

2012

AMR

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In this paper we proposed a new technique for identifying system stress due to the loading in wide area of power system based on the phasor angle difference behavior. The difference of voltage phasor angle between busses can be transferred in to a simple conversion and trigonometric wave signal during load increasing. Using Discrete Fourier Transform (DFT), the signal will be transformed into the spectral frequency. The proposed technique will analyzed current condition by visualized the level of stress and proximity to voltage stability limit in the system based on the change of spectral frequency . This method also can be used to monitor such loss of generators or transmission line outages. The result shown that the proposed technique is simple, fast and reliable, requiring minimum data measurement and be suitable for Wide Area Monitoring System.

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Section: Proposed Methodsmentioning

confidence: 99%

Section: Case Studiesmentioning

confidence: 99%

A New Method for Online Assessment of Voltage Stability

Innah

Hiyama

2012

AMR

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“…Where:V g = Nearest generator voltage, V l = Analyzed load voltage, ∆V n is a simplification of the actual approach defined in [17]. Most of the indices of voltage stability are somewhat inaccurate due to the different approximation [18]. But to improve its reliability, SVSI relies on other physical parameters (amplitude and voltage or power phase).…”

Section: [ ] [mentioning

confidence: 99%

Enhancement of Voltage Stability using SVC in PSCAD Software

Shabir¹,

Nawaz²,

Vijayvargiya³

2020

SKIT Research Journal

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In the power system network, the constant increase in demand for active and reactive power has restricted the possibility for network expansion which many times cause serious problems. The power system must be capable to keep acceptable voltage at all nodes in the network in a normal operating situation and during times of disturbance. Voltage instability is a severe concern in the system due to an increasing and unpredictable voltage drop. The research provided in this paper deals with many facts about the issue of voltage stability.The major emphasis of this paper is to connect the FACTS device (Static VAR Compensator) at the system's sensitive location to rectify the voltage instability issue. The SVC enables the transmission lines to be loaded near to their thermal limits, pushing the power to travel through the optimal paths. The SVSI is used to identify the optimal location of SVC. IEEE 14 bus system is used as test system to check the efficacy of proposed technique, Different cases (like base, 5% increment in load, 5% decrement in load) are considered here also. In each case voltage deviation (VD) is calculated and found superior as compared to other techniques. It has been observed that SVSI give better location of SVC rather than other indexes.

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“…The first stage is usually referred to as contingency ranking, and contingencies from a predefined list are analyzed and ranked by using a simple, computationally fast method. A method for ranking contingencies based on information from the base case and post-contingency operating states using Voltage Stability Margin (VSM) was proposed [23]. A new index based on P_Q_V curve of a specified bus, area, or overall system has been proposed to provide useful information about the ranking of voltage weak nodes, classification of areas susceptible to voltage stability and also extended to contingency analysis and load shedding schemes [24].…”

Section: Contingency Rankingmentioning

confidence: 99%

A Novel Line Stability Index for Voltage Stability Analysis and Contingency Ranking in Power System Using Fuzzy Based Load Flow

Kanimozhi¹,

Selvi²

2013

Journal of Electrical Engineering and Technology

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-In electric power system, the line stability indices adopted in most of the instances laid stress on variation of reactive power than real power variation of the transmission line. In this paper, a proposal is made with the formulation of a New Voltage Stability Index (NVSI) which originates from the equation of a two bus network, neglecting the resistance of transmission line, resulting in appreciable variations in both real and reactive loading. The efficacy of the index and fuzzy based load flow are validated with IEEE 30 bus and Tamil Nadu Electricity Board (TNEB) 69 bus system, a practical system in India. The results could prove that the identification of weak bus and critical line in both systems is effectively done. The weak area of the practical system and the contingency ranking with overloading either line or generator outages are found by conducting contingency analysis using NVSI.

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Multi-criteria contingency ranking method for voltage stability

Cited by 19 publications

References 14 publications

A New Method for Online Assessment of Voltage Stability

A New Method for Online Assessment of Voltage Stability

Enhancement of Voltage Stability using SVC in PSCAD Software

A Novel Line Stability Index for Voltage Stability Analysis and Contingency Ranking in Power System Using Fuzzy Based Load Flow

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