Synchronous generator stator protection using a fuzzy logic-based voltage-controlled overcurrent protection scheme

Vahdati, Pouya Mahdavipour; Seyedi, Heresh; Arjmandi, Arash; Moradi, Soheil

doi:10.1002/etep.1844

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Today, there are various types of relay protection (RP) for generators [4] (electromechanical, microelectronic, and microprocessor). Demands are high for all types of protection.…”

Section: Introductionmentioning

confidence: 99%

Research of the surge voltage protection by means of Hybrid Real-Time Power System Simulator

2017

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“…Today, there are various types of relay protection (RP) for generators [4] (electromechanical, microelectronic, and microprocessor). Demands are high for all types of protection.…”

Section: Introductionmentioning

confidence: 99%

Research of the surge voltage protection by means of Hybrid Real-Time Power System Simulator

2017

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“…There are several methods for detection of the various types of fault in synchronous generators . The second faults at the excitation system of synchronous generators can be detected by analyzing the certain electrical variables such as stator no‐load voltage or air gap flux .…”

Section: Introductionmentioning

confidence: 99%

A new technique for determining the location of ground fault in the rotor of synchronous generators with various types of excitation system

Rahimi‐Taghanaki

Seifossadat

Razzaz

et al. 2016

Int. Trans. Electr. Energ. Syst.

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SUMMARYGround fault in the rotor winding of generators can cause serious damage to the generators and consequently, to the power plant. This paper proposes a practical online technique to determine the ground fault location in the rotor winding of a synchronous generator. The proposed technique is based on the analysis of the measured voltage and input/output currents of the rotor winding. The main distinguishing feature of the proposed technique is that, contrary to the existing technique, it is applicable to various types of excitation system. The accuracy and applicability of the proposed technique is demonstrated through both computer simulations and experimental tests. The experimental tests have been carried out using a new device which works based on the proposed technique. The results show that the proposed technique can determine ground fault locations with a higher accuracy compared with the existing techniques.

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Experimental investigations using quadratic‐tripping characteristics based on alienation/coherence coefficients of voltage and current signals for synchronous generators protection

Mahmoud

Elwakil

2021

IET Generation Trans & Dist

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A protection scheme is proposed using alienation method derived from coherence model which is a backup protection method for the differential overcurrent protection of synchronous generators. This scheme which is realized by the computational technique based on the alienation coefficients estimated for generator voltage and current signals is considered to be mounted beside the main differential protection system, which operates in the cases that differential protection is unable to detect the internal faults. This novel protection algorithm operates by adjusting the alienation settings of the suggested relay that sends the trip signal to the three-phase circuit breaker of the protected generator. In the proposed method, fault occurrences can be determined regardless of variations of terminal voltage and current in different working states of synchronous generator. This is done by designing new quadratic-tripping characteristics based on alienation limits for the electrical signals. To demonstrate the proposed method, a motor-synchronous generator set with built instrument transformers, for measuring voltage and current data at the generator terminals, are used. Extensive experimental investigations validate the functionality of this novel protection scheme under different abnormal, unbalance and operating conditions for the generator under test. How to cite this article: Mahmoud, R.A., Elwakil, E.S.: Experimental investigations using quadratic-tripping characteristics based on alienation/coherence coefficients of voltage and current signals for synchronous generators protection. IET Gener. Transm. Distrib. 1-23 (2021).

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Synchronous generator stator protection using a fuzzy logic-based voltage-controlled overcurrent protection scheme

Cited by 6 publications

References 27 publications

Research of the surge voltage protection by means of Hybrid Real-Time Power System Simulator

Research of the surge voltage protection by means of Hybrid Real-Time Power System Simulator

A new technique for determining the location of ground fault in the rotor of synchronous generators with various types of excitation system

Experimental investigations using quadratic‐tripping characteristics based on alienation/coherence coefficients of voltage and current signals for synchronous generators protection

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