Voltage stability preventive and emergency preventive control using VIPIt sensitivities

Esaka, T.; Kataoka, Y.; Ohtaka, Toshiya; Iwamoto, Satoshi

doi:10.1109/psce.2004.1397490

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…For precise evaluation of both methods (Modified Ward-PV and Linearization), it is assumed that the OCVC problem is solved by two methods and the control variables are applied on unreduced system (complete model of the system). A good comparison between answers of Modified Ward-PV and Linearization method with unreduced model is given in the Table (5). It is resulted that the Modified Ward-PV is twice more precise than linearization, but the speed of method is lower than linearization method.…”

Section: Scenario Imentioning

confidence: 96%

“…The time needed for search in the unreduced system is about 16 seconds, but as is seen in Table (5), the same time will be reduced to 8.5 and 11.4 seconds in linearization and modified Ward-PV methods respectively. This is because of number of equations, as can be seen in Table (6).…”

Section: Scenario Imentioning

confidence: 99%

“…The most important factor in investigating the problem of emergency voltage control is the time shortage. Because if the required control actions are not applied on the power system at the right time, the power system will be out of its absorption area and subsequently voltage collapse will definitely occur [5][6][7][8].…”

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confidence: 99%

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A quick solution to optimal coordinated voltage-control, based on dimension-reduction of power system via Modified Ward-PV

2021

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Voltage control and Voltage stability are the most important issues in the power system. The purpose of this paper is to investigate the emergency voltage control in power systems. One of the most important proposed methods to solve this issue is optimal coordinated voltage control (OCVC), which is based on the model predictive control (MPC). Time limitations for preventing voltage collapse is the most critical constraint to solve an OCVC problem. In this paper, the Modified Ward-PV will be proposed to reduce the dimension of the power system and consequently, the speed of solving problem is increased. In this method, immediately after occurrence a fault, the power system is partitioned to into three subsystems by spectral graph partitioning method. Partitioning is based on reactive power flow through the lines. The subsystems, which are far from fault, will be replaced by the reduced model. This method will drastically reduce the number of system equations and will boost the speed of solving problem. The simulations results obtained on New England IEEE 39-Bus System reveals that the proposed method acts more precise than dimension reduction of power system based on linearization of external subsystems, but the speed of solving problem decrease.

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Section: Scenario Imentioning

confidence: 96%

Section: Scenario Imentioning

confidence: 99%

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A quick solution to optimal coordinated voltage-control, based on dimension-reduction of power system via Modified Ward-PV

2021

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“…En 1988 se definió un índice basado en la diferencia angular de los voltajes entre dos nodos y un índice de proximidad a la inestabilidad de voltaje VIPI, el cual calculaba la diferencia de ángulos entre dos nodos (Tamura et al, 1988). También se ha definido el índice de proximidad a la inestabilidad de voltaje VIPIt para la prevención y el control de emergencias (Esaka et al, 2004). En el 2004 se presentó el índice de margen de estabilidad de voltaje (VSMI), basado en las diferencias angulares máximas de los voltajes y la del estado normal de operación (He et al, 2004).…”

Section: ) Técnicas Basadas En Fasores Y Vectores De Voltajeunclassified

Métodos para el Estudio de la Estabilidad de Voltaje en Sistemas de Potencia

2008

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ResumenEste artículo presenta una revisión crítica actualizada de los métodos de estudio de la estabilidad de voltaje en sistemas de potencia. Se realiza la descripción y clasificación en orden cronológico de cada una de las técnicas de estudio, para la detección y predicción de la estabilidad de voltaje, desde la identificación del problema en los años 60's. También se presentan las modificaciones a las técnicas originales y la utilización en la solución a problemas comunes de estabilidad de voltaje presentados en los sistemas de potencia. La comparación de las técnicas se realiza de acuerdo a la información de la literatura y se discuten las ventajas y desventajas de cada técnica de estudio en la solución de los problemas de estabilidad de voltaje. Palabras clave: estabilidad de voltaje, sistemas de potencia, detección de estabilidad, revisión de la literatura Methods for studying Voltage Stability in Power Systems AbstractThis paper presents the state of the art of methods for studying voltage stability in power systems. Description and chronological classification of each technique for detection and prediction of voltage stability, since the identification of the problem in the 60's, are done. Also, modifications to the original techniques and their utilization to solve common problems of voltage-stability in the power system are presented. Comparisons of the different techniques were done according to literature information and the advantages and disadvantages of each technique in the solution of voltage stability problems are discussed.

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“…In general, these indices aim at defining a scalar magnitude that can be monitored as system parameters change, with fast computation speed. They include the sensitivity factors [5], second order performance index [6], voltage instability proximity index (VIPI) [7], singular values and eigen values [8], and so on.…”

Section: Introductionmentioning

confidence: 99%

Power system security enhancement using fuzzy logic composite criteria and particle swarm optimization algorithm

Vaisakh

Raju

2010

HIS

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The network contingencies in power system often contribute to over-loading of network branches, unsatisfactory voltages and also to voltage collapse. To maintain security against voltage collapse, it is desirable to estimate the effect of contingencies. For security enhancement, remedial action against possible network overloads in the system following the occurrence of contingencies is required. Line overloads can be removed by means of generation re-dispatching and by adjustment of reactive power control variables such as tap-changing transformers, generator excitations, and shunt reactive power compensating devices. This paper presents fuzzy logic composite criteria to evaluate the degree of severity of the network contingency. A Particle Swarm Optimization (PSO) based algorithm was also proposed for solving the Optimal Power Flow (OPF) problem to alleviate line overloads. The proposed PSO algorithm identifies the optimal values of generator active-power output and the adjustment of reactive power control devices. Simulation results on IEEE 14, 30, and 118-bus test systems are presented and compared with the results of other approaches reported in the literature.

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Voltage stability preventive and emergency preventive control using VIPIt sensitivities

Cited by 4 publications

References 7 publications

A quick solution to optimal coordinated voltage-control, based on dimension-reduction of power system via Modified Ward-PV

A quick solution to optimal coordinated voltage-control, based on dimension-reduction of power system via Modified Ward-PV

Métodos para el Estudio de la Estabilidad de Voltaje en Sistemas de Potencia

Power system security enhancement using fuzzy logic composite criteria and particle swarm optimization algorithm

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