Preventing of transient voltage instability due to induction motor loads by static condenser

Liu, Haijun; Wen-ying, Huang; Renzhen,

doi:10.1109/icit.1994.467211

Cited by 9 publications

(8 citation statements)

References 9 publications

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“…The issue of load modeling and the effects of dynamic loads on voltage phenomena have been studied to a significant extent in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In [1] the issues of voltage dips in 3-phase systems after symmetric or asymmetric faults and the accurate modeling of voltage recovery are addressed.…”

Section: Introductionmentioning

confidence: 99%

“…It is well-known that in both phenomena, the voltage recovery may be delayed by load dynamics (such as the dynamics of induction motors, etc. ), especially when not enough fast reacting reactive resources (dynamic VAR sources) exist [1][2][3][4][5][6][7][8][9]. At the same time, the slow voltage recovery may trigger the operation of protective relays disconnecting electric loads and subsequent creation of overvoltages.…”

Section: Introductionmentioning

confidence: 99%

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Voltage stability and voltage recovery: load dynamics and dynamic VAr sources

Meliopoulos

Cokkinides

Stefopoulos

2006

2006 IEEE Power Engineering Society General Meeting

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Voltage instability may occur from a variety of phenomena. Two of the most frequent are: (a) voltage recovery following typical faults on a power system and (b) voltage collapse during transient swings of the power system. We propose approaches to deal with these phenomena consisting of identifying the phenomena involved and proper response of control devices in the system such as dynamic VAR sources to mitigate the problem. Most of the times the phenomena are tolerable assuming that there are no secondary responses such as tripping of motors, switching of reactors etc. that tend to aggravate the problem. We also propose tools for reliable simulation of the phenomena involved. Specifically, a modeling approach is proposed, coined the time continuation method, that combines the efficiency of power flow techniques and capabilities of transient stability models. The proposed methodology is based on a quadratic model of the electric power system, including generators, voltage regulators and dynamic loads consisting mainly of induction motors. It is shown that the proposed method and model explains recent observed voltage stability and voltage recovery phenomena. Numerical experiments with visualizations are presented for the purpose of quantifying the phenomena and identifying the major parameters affecting these phenomena. It is shown that proper combinations of static and dynamic reactive power sources can alleviate the risk of voltage instability. Finally, the paper proposes a methodology for selecting the location and size of a mix of static and dynamic VAR resources for the purpose of alleviating the risk of voltage instability and slow voltage recovery.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Voltage stability and voltage recovery: load dynamics and dynamic VAr sources

Meliopoulos

Cokkinides

Stefopoulos

2006

2006 IEEE Power Engineering Society General Meeting

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“…References [4,5] study the voltage recovery of wind turbines after shortcircuits. The issue of mitigating the delayed voltage recovery using fast VAR resources is addressed in [6][7][8]. The impact of induction motor loads on voltage phenomena has also been studied on a more general research basis.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the voltage recovery after a disturbance in a power system is delayed by load dynamics (such as the dynamics of induction motors, etc. ), especially when not enough fast reacting reactive resources (dynamic VAR sources) exist [1][2][3][4][5][6][7][8][9]. The phenomenon is well known to utilities and it is typically studied either using static load flow techniques or with full scale dynamic simulations.…”

Section: Introductionmentioning

confidence: 99%

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Induction Motor Load Dynamics: Impact on Voltage Recovery Phenomena

Stefopoulos

Meliopoulos

2005/2006 Pes Td

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Abstract-This paper addresses the impact of load dynamics, and in particular induction motor loads, on voltage recovery after disturbances. The paper proposes a methodology that is based on load flow techniques with advanced modeling capabilities, augmented by a simplified induction motor dynamic model. The objective is to realistically capture the dynamic characteristics of voltage recovery phenomena, avoiding, however, the full scale transient simulation. The approach uses the quadratized power flow model with explicit induction motor representation. The paper describes the modeling approach and the overall methodology for evaluating the load dynamics on voltage recovery. Preliminary results of the application of the method on a simple power system with load dynamics are also included in the paper.

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