Development of a predictive pole-slip protection function for synchronous generators

Lamont, Lafras; Kock, J.A. de

doi:10.1109/ecce.2015.7309822

Cited by 4 publications

(6 citation statements)

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“…Depending on the seriousness of the disturbance and the relevant response of the system controls, the system may continue to be stable or face a large separation of generators rotor angles, thus causing in most cases a pole slipping of the connected generators and finally synchronism is lost. This pole slipping condition develops strong oscillations and affecting the network and the generators in a negative way (Fischer et al, 2012;Lamont and De Kock, 2015). When the power system is unstable, a group of generators swings with respect to another generators group across the system.…”

Section: Introductionmentioning

confidence: 99%

“…When the power system is unstable, a group of generators swings with respect to another generators group across the system. These swings wouldn't be observed by the network protection; thus, the need for pole slipping protection at the generator is necessary (Lamont and De Kock, 2015;Reimert, 2005). It is therefore important to have a protection system that can detect Out of Step (OOS) conditions and minimize the relevant consequences.…”

Section: Introductionmentioning

confidence: 99%

“…The impact of power system disturbances on the generator protection performance has been reported in (Patel et al, 2004;Tziouvaras, 2007). The development of a predictive pole-slip protection function for synchronous generators has been reported in (Lamont and De Kock, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Generator pole slipping: Pole slipping mode is an issue for synchronous generators operated in parallel with electrical systems (Lamont and De Kock, 2015;Redfern and Checksfield, 1998). it caused by the system disturbances such as severe faults, sudden load variations, long fault clearing time, line switching, etc.…”

Section: Introductionmentioning

confidence: 99%

“…(Redfern and Checksfield, 1998). In such cases, the system may continue to have a stable operation or face large power oscillations that lead to pole slipping mode in one or more generators in the system (Lamont and De Kock, 2015). Generator pole slipping causes high fluctuations of generator's currents which are causes high fluctuations in system voltages.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Novel IEC 61850-Based Protection Scheme to Maintain the Generator Synchronous Operation During Power System Disturbances

Atalah¹,

Mahmoud²,

Mattar³

2019

J. Eng. Appl. Sci.

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This study proposes an IEC 61850 based protection scheme to maintain the generator synchronous operation and prevent its tripping by the pole slipping protection (Relay 78) during system disturbances while the transmission line distance protection (R TL) is blocked from operation. The scheme has been studied during common system disturbances, namely sudden load applications. This scheme could maintain the synchronous operation of the local generator and enable it to support the system during and after such disturbances; therefore, maintaining the system stability. A real recorded incidence of generator tripping by Relay 78 in the Egyptian grid is investigated and a new scheme to prevent such tripping during system disturbances is introduced. The new scheme takes the advantage of using IEC 61850 communication standard in coordinating the tripping role between Relay 78 and R TL. This scheme can be applied based on the current technologies of protection relays. The scheme is modeled and simulated using MATLAB ® Software and Xelas IEC 61850 simulator. The simulated system is configured according to the typical parameters of the Egyptian national grid 220 kV. Satisfactory results have proved the scheme effectiveness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%