A digital distance relay using negative sequence current

Ohura, Y.; Matsuda, Takayuki; Suzuki, Mamoru; Andow, F.; Kurosawa, Y.; Takeuchi, Akihiro

doi:10.1109/61.107259

Cited by 12 publications

(3 citation statements)

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“…There are of course other factors that could influence relay operation, for example faulted phase selection. Detailed explanations are beyond the scope of this paper [6].…”

Section: B Measurement Error When One Phase Is Open In the Parallel mentioning

confidence: 98%

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Problems associated with zero sequence compensation applied to distance protection

Kase

Kurosawa²,

Beaumont³

2006

2006 IEEE Power Engineering Society General Meeting

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Zero sequence compensation is one of the essential functions found within distance protection and is widely used all over the world. However, the application of this function can be problematic as it can cause complex and subtle effects. Often investigations into problems found with zero sequence compensation have not clarified whether or not a problem would have caused unwanted operation under very severe conditions. In this paper the undesirable effect of zero sequence compensation on the measurement of resistance and on the performance of Mho elements is investigated and described. These undesirable effects are explained using vector diagrams and equations in order that a general tendency of the effect can be understood. The explanation is confirmed by simulation using ATP. Finally, the problems are summarised and possible solutions are suggested.

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“…There are of course other factors that could influence relay operation, for example faulted phase selection. Detailed explanations are beyond the scope of this paper [6].…”

Section: B Measurement Error When One Phase Is Open In the Parallel mentioning

confidence: 98%

“…By substituting (10) to (6), resistance measurement with zero sequence compensation for this example is given as follows. Table II.…”

Section: A Measurement Error For An Earth Fault With Resistancementioning

confidence: 99%

Problems associated with zero sequence compensation applied to distance protection

Kase

Kurosawa²,

Beaumont³

2006

2006 IEEE Power Engineering Society General Meeting

Self Cite

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“…The 50Q element operates when the amplitude of the negative-sequence current exceeds a certain threshold and is used to detect unbalanced faults. This element is typically used in transmission line ground fault detection and in conjunction with other protective elements, e.g., in a fault detector scheme supervising directional negative-sequence elements [32], time overcurrent relays, and distance relays which use negativesequence current for remote backup protection [33].…”

Section: A 50q Malfunctionmentioning

confidence: 99%

Impact of Inverter-Based Resources on Negative Sequence Quantities-Based Protection Elements

Haddadi

Zhao

Koçar

et al. 2021

IEEE Trans. Power Delivery

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Inverter-Based Resources (IBRs), including Wind turbine generators (WTGs), exhibit substantially different negative-sequence fault current characteristics compared to synchronous generators (SGs). These differences may cause misoperation of customary negative-sequence-based protective elements set under the assumption of a conventional SG dominated power system. The amplitude of the negative-sequence fault current of a WTG is smaller than that of an SG. This may lead to misoperation of the negative-sequence overcurrent elements 50Q/51Q. Moreover, the angular relation of the negativesequence current and voltage is different under WTGs, which may result in the misoperation of directional negative-sequence overcurrent element 67Q. This paper first studies the key differences between the WTGs and SG by comparing their equivalent negative-sequence impedances with SG's. Then, simulation case studies are presented showing the misoperation of 50Q and 67Q due to wind generation and the corresponding impact on communication-assisted protection and fault identification scheme (FID). The impact on directional element is also experimentally validated in a hardware-in-the-loop real-time simulation set up using a physical relay. Finally, the paper studies the impact of various factors such as WTG type (Type-III/Type-IV) and Type-IV WTG control scheme (coupled/decoupled sequence) to determine the key features that need to be considered in practical protection studies. The objective is to show potential protection misoperation issues, identify the cause, and propose potential solutions.

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A novel fuzzy-logic-based phase selection technique for power system relaying

Youssef

2004

Electric Power Systems Research

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A digital distance relay using negative sequence current

Cited by 12 publications

References 1 publication

Problems associated with zero sequence compensation applied to distance protection

Problems associated with zero sequence compensation applied to distance protection

Impact of Inverter-Based Resources on Negative Sequence Quantities-Based Protection Elements

A novel fuzzy-logic-based phase selection technique for power system relaying

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