Optimal switching of dynamic braking resistor, reactor or capacitor for transient stability of power systems

Rahim, M. A.; Al-Sammak, A.-I.

doi:10.1049/ip-c.1991.0011

Cited by 15 publications

(6 citation statements)

References 5 publications

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“…Therefore, the impact of the switching operation becomes more effective with the size of the shunt reactors. The application of a switching strategy on shunt devices such as capacitors and reactors as improvement of the stability is a known technique in literature, but basically it is conceived as switching-on operation performed on capacitor banks [11][12][13][14]. However, the switching-on operation of a capacitor is equivalent to the switching-off of a reactor, and vice versa: switching large shunt reactors is expected to have a similar positive impact on the stability of the power system.…”

Section: Theoretical Analysis Of the Switching Strategymentioning

confidence: 99%

Improving Angle Stability by Switching Shunt Reactors in Mixed Overhead Cable Lines. An Italian 400 kV Case Study

2019

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Stringent environmental constraints make the construction of new transmission overhead lines more and more difficult. Alternatively, today it is possible to use cable lines for high (HV) and extra-high (EHV) voltage systems. The configuration of the so-called mixed lines can create some problems in the operation of the electrical system, both during steady-state and transient conditions. In particular, the system stability is one of the main concerns when analyzing the dynamic response of power systems. In this paper, the study of angular stability of a system containing a mixed line is presented: a specific control logic applied to the shunt reactors of the mixed line is proposed as improvement of the overall system stability. The proposed switching logic is first discussed from a theoretical point of view and validated with two different testing systems. Then, the existing overhead-cable lines connecting Sicily to the rest of continental Europe 400 kV power system are taken as case study for the application of the proposed switching strategy. Several simulations are performed in the power system analysis software NEPLAN360: the results show the fundamental role of the timing of the control actions applied on the shunt reactors in helping the system to keep the stability. The proposed control proves to be an effective support to the system subjected to critical contingencies, contributing decisively to avoid the angular separation between areas and therefore to preserve the stability of the system.

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Section: Theoretical Analysis Of the Switching Strategymentioning

confidence: 99%

Improving Angle Stability by Switching Shunt Reactors in Mixed Overhead Cable Lines. An Italian 400 kV Case Study

2019

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“…Weakest generators are those that are operating close to the stability limits. Many researchers have worked to sort out the suitable switching strategy for the Braking resistors [38]. Reference [39] shows three strategies in which resistors resistor reactor, and reisistor capacitor are used for the enhancement of transient stability.…”

Section: Braking Resistorsmentioning

confidence: 99%

“…There are two ways of applying fast valving; Sustained Fast Valving (SFV) and Momentary Fast Valving (MFV). In MFV the valve is closed for a very short movement after the occurrence of fault and reopens and restores the driving power of the turbine while in SFV the steam is passed through the bypass system [43]. For small variation the governor control is enough however in case of large variation the governor control is not sufficient to adjust the variation.…”

Section: Fast Valvingmentioning

confidence: 99%

Analysis Stduy of Different Control Schemes Used For The Improvement Of Transient Stability: A Review

Ullah¹

2019

IJEW

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In this paper various control schemes used for the enhancement of tranisent have been studied. There are two main control schemes used for transient stability enhancement: Prevntive controle scheme and Emergency control scheme. In this paper the main focus is on emergency control scheme. Further various emergency schemes have been presented in this paper like fast valving, braking resistors, fast valving in coordination with braking resistor, HVDC link for the improvement of transient stability. At the end of this paper a new control scheme has also been proposed in which PMU's are used in coordination with HVDC link for the improvement of transient stability. PMU's are used for the continuous monitoring of the system parameters.

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“…In case of a fault in the power system, the braking resistor is temporarily inserted in parallel at the nearest end of the generator to absorb the excessive energy produced by the generator acceleration. There are studies examining the use of braking resistors jointly with other devices to increase its efficiency [4][5][6], and we think that there are possibilities of their use for achieving an even better transient stability. Some examples of practical applications of braking resistors can be found in the Bonneville Power Plant (Oregon) [1], Four Corner Power Plant of Public Service Company (Arizona) [1][2][3], and in Owase Mita and Atsumi power plants of Chubu Electric Power Co. (Japan).…”

Section: Introductionmentioning

confidence: 97%

“…Most of the proposed methods were based on the use of the so-called FACTS (flexible AC transmission system) devices [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on improvement of transient stability with braking resistor

Iida

Imamura

Shirai

et al. 2008

Elect Comm in Japan

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SUMMARYThe electric power industry has undergone considerable changes in the past decade throughout the world. The essential feature of these changes is to promote competition among utilities and to form active power market with reliable and less expensive electricity. Under these circumstances, stabilization and voltage stability problems of power systems are very important. Power systems engineers are examining the effect of the resistance value of braking resistors and the timing of their insertion on the improvement of the stability level.In this paper, we report on experiments carried out on the optimal size and switching of braking resistors, shunt capacitors, and other auxiliary devices. The experimental system model consists of a single synchronous generator connected through two parallel transmission lines to an infinite bus.

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Optimal switching of dynamic braking resistor, reactor or capacitor for transient stability of power systems

Cited by 15 publications

References 5 publications

Improving Angle Stability by Switching Shunt Reactors in Mixed Overhead Cable Lines. An Italian 400 kV Case Study

Improving Angle Stability by Switching Shunt Reactors in Mixed Overhead Cable Lines. An Italian 400 kV Case Study

Analysis Stduy of Different Control Schemes Used For The Improvement Of Transient Stability: A Review

Experimental study on improvement of transient stability with braking resistor

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