An Innovative Loss-of-Excitation Protection Based on the Fuzzy Inference Mechanism

Morais, Adriano Peres de; Cardoso, J.R.; Mariotto, L.

doi:10.1109/tpwrd.2010.2051462

Cited by 80 publications

(77 citation statements)

References 20 publications

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“…Majority of LOE protection studies seek a proficient way to increase the speed of relay response. In a paper [17], the operation time of relay is reduced to 0.5 s, using fuzzy logic. Investigations in Reference 18 showed the LOE protection in isolated systems with induction motor.…”

Section: Loss Of Excitation (Loe) Relaymentioning

confidence: 99%

Performance comparison of LOE protection of synchronous generator in the presence of UPFC

Ebrahimi

Ghorbani

2016

Engineering Science and Technology, an International Journal

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Available online Keywords: Generator loss of excitation (LOE) protection Unified power flow controller (UPFC) Phasor measurement units (PMUs) Flexible AC transmission system (FACTS) A B S T R A C TGenerator loss of excitation (LOE) protection is a principal protection of power system which operate based on impedance measurement. This relay calculates impedance by measuring voltage and current at the generator terminal. On the other hand, the presence of unified power flow controller (UPFC) in transmission lines changes measured voltage and current signals during loss of excitation. In this paper, the impact of UPFC on the performance of LOE protection has been analytically investigated. Afterwards, using modeling results, it has been attained that the presence of UPFC leads to the drastic delay on the performance of LOE relay. This delay results to the overloading and damaging of armature winding of generator. It is also shown that in partial LOE presence of UPFC causes under-reach of the relay. Finally, the phasor measurement units (PMUs) based method has been proposed to reduce the effect of UPFC on the LOE protection. The results indicate that using this new method, the delay of LOE relay has been reduced. In the surveys conducted, various conditions of the power system have been considered.

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Section: Loss Of Excitation (Loe) Relaymentioning

confidence: 99%

Performance comparison of LOE protection of synchronous generator in the presence of UPFC

Ebrahimi

Ghorbani

2016

Engineering Science and Technology, an International Journal

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“…In view of this continuing concern over relay performance, a general study was launched to review the performance of the offset mho Loss of Excitation (LOE) relay different system conditions. Subsequently, many approaches and algorithms have been addressed to solve the generators Loss of Excitation (LOE) problem such as: a) Fuzzy inference mechanism based technique [16]. b) ANN based technique [17].…”

Section: Loss Of Excitation Faults Detection In Hydro-generators Usinmentioning

confidence: 99%

Loss of Excitation Faults Detection in Hydro-Generators Using an Adaptive Neuro Fuzzy Inference System

Aziz¹,

Elsamahy²,

Moustafa³

et al. 2016

IJEECS

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“…Hence, most of the LOE articles are based on enhancing the safety of offset Mho distance protection and evaluating the impacts of the power network disturbances on these protections. These researches used different approaches, such as fuzzy inference, artificial neural networks and a support vector machine (SVM) to improve LOE protection [11][12][13]. For instance, Pajuelo et al [13] presented an SVM-based method for detection of LOE situations from other transient disturbances, which will not harm the generator.…”

Section: Literature Reviewmentioning

confidence: 99%

Impact of static synchronous compensator on flux‐based synchronous generator loss of excitation protection

Yaghobi

2015

IET Generation, Transmission & Distribution

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In order to increase the power transfer and providing the optimum utilisation of the power system capability, application of flexible alternating current transmission system (FACTS) devices technology, such as static synchronous compensator (STATCOM), has been attracted, in recent years. However, the STATCOM changes the voltage and current of the power system that disturb the operation of the impedance-based synchronous generator loss of excitation (LOE) protection. Then, this study proposes a new flux-based LOE protection method, in the presence of STATCOM, that is based on the local variation of the flux linkage of the generator available at the location of relay. The mentioned relay is independent of other generator protection relays without any coordination. In order to show the satisfying operation of the proposed method, some simulations have been carried out in the Matlab/Simulink software. A single-machine infinite bus and a three-machine infinite bus systems have been used in simulations. The results show that the presence of STATCOM has no important effect on the performance of proposed relay opposite to a negative offset relay with two protective zones (the widely used impedance method) which is affected by STATCOM operation.

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An Innovative Loss-of-Excitation Protection Based on the Fuzzy Inference Mechanism

Cited by 80 publications

References 20 publications

Performance comparison of LOE protection of synchronous generator in the presence of UPFC

Performance comparison of LOE protection of synchronous generator in the presence of UPFC

Loss of Excitation Faults Detection in Hydro-Generators Using an Adaptive Neuro Fuzzy Inference System

Impact of static synchronous compensator on flux‐based synchronous generator loss of excitation protection

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