Overcurrent protection against multi-phase faults in MV networks based on negative and zero sequence criteria

Andruszkiewicz, Jerzy; Lorenc, Józef; Staszak, Bogdan; Weychan, Agnieszka; Zięba, Beata

doi:10.1016/j.ijepes.2021.107449

Cited by 14 publications

(10 citation statements)

References 27 publications

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“…Therefore, there is a need to develop different protection approaches and modify the traditional overcurrent criteria to improve the selectivity and sensitivity of the protection system. To overcome this problem, network operators need to add an EF protection system at all voltage levels in the network and coordination with existing OCR and directional OCR [4][5][6][7]. However, this process is highly costs which can limit of having additional DGs in the grid.…”

Section: A Motivation and Literature Reviewmentioning

confidence: 99%

“…Similarly, Polajžer et al [4] used a self-adaptive DE method to achieve the optimal settings of ground-fault relays in microgrid system. Furthermore, Andruszkiewicz et al [6] presented a multi-criteria scheme for solving the OCRs coordination problem with EF in medium voltage networks. However, the pervious literature [4][5][6][7] developed optimal coordination or adaptive strategies based on using the traditional inverse time characteristic, which will limit the performance at low fault current.…”

Section: A Motivation and Literature Reviewmentioning

confidence: 99%

“…Furthermore, Andruszkiewicz et al [6] presented a multi-criteria scheme for solving the OCRs coordination problem with EF in medium voltage networks. However, the pervious literature [4][5][6][7] developed optimal coordination or adaptive strategies based on using the traditional inverse time characteristic, which will limit the performance at low fault current. Table 1 provides a critical review and summarizes the main literature of OCR and EF relay protection strategies and schemes.…”

Section: A Motivation and Literature Reviewmentioning

confidence: 99%

“…Table 1 provides a critical review and summarizes the main literature of OCR and EF relay protection strategies and schemes. Several researchers [1][2][3][4][5][6][7][8][9][10] have not taken into account the earth relay, while [5] has not included the directional OCR. Furthermore, the authors in [11] investigated their proposed system using three phase fault (LLL) and line-to-ground (LG).…”

Section: A Motivation and Literature Reviewmentioning

confidence: 99%

“…As result, when the neutral voltage increases to a level higher than the gap breakdown voltage, the traditional protection system will trip and disconnect the PV transformers from the rest of the network. Disconnection and isolating many DGs from the network can cause serious stability problems [3][4][5][6]. Therefore, the neutral voltage must be accurately estimated and considered to ensure that current gap protection does not operate inappropriately and cause network stability issues.…”

Section: B Ground Fault and Overvoltage For A Power Network With Ibdgmentioning

confidence: 99%

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Advanced Coordination Method for Overcurrent Protection Relays Using New Hybrid and Dynamic Tripping Characteristics for Microgrid

et al. 2022

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Nowadays, the Overcurrent (OC) and Earth Fault (EF) relays coordination problem is one of the most complex and challenging concerns of power protection and network operators due to the high and volatile generation capacity of renewable energy sources in the grid. In this article, a new and dynamic optimal coordination scheme based on a novel hybrid tripping characteristic has been designed and developed for Over Current Relays (OCRs). Considering the impact of renewable energy sources such as the photovoltaic (PV) system on fault characteristic, this work presents and verifies a novel dynamic and hybrid tripping to achieve minimum tripping time and improve the OCR and EF relays coordination performance in terms of security, sensitivity, and selectivity. The proposed dynamic and hybrid scheme will help the OCRs to cover the EF events, and it has been tested under different fault scenarios compared to the literature. The IEEE-9 and IEEE-33 bus systems are implemented in the ETAP package to validate the effectiveness of the proposed hybrid characteristics against traditionally well-established IEC characteristics. Furthermore, the performance of the proposed advance and dynamic protection approach which doesn't require a communication infrastructure is investigated for a power network with PV plants under different grid operation modes and topology to provide more robustness protection system. The results, as presented using Industrial software (ETAP), showed that the novel dynamic and hybrid tripping scheme improved the speed of the total time tripping different fault scenarios and location by more than 50% and covers all EF events compared to traditional OCR schemes from the literature. The proposed novel dynamic approach has superior performance in detecting high-impedance faults and significantly reducing the tripping time on the IEEE 33 bus network by 47%.INDEX TERMS Over current relays, Earth fault relay, Dynamic coordination scheme, Renewable energy sources, PV.

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Section: A Motivation and Literature Reviewmentioning

confidence: 99%