Analysis of Power Flow Reversion in Distribution Transformers Due to Medium-Voltage Fault and Distributed Generation in Secondary Networks

Neiva, Leonardo J. R.; Coelho, Francisco C. R.; Peres, Wesley; Flávio, Silvan A.; Dias, Leandro

doi:10.1007/s40313-021-00763-4

Cited by 7 publications

(5 citation statements)

References 28 publications

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“…Neiva et al proposed a fault segment location method based on xOR operation of matrix, which multiplied the network description matrix and fault information matrix to obtain the fault discrimination matrix; then, xOR operation was performed on the elements of the fault discrimination matrix and the corresponding criteria were used to obtain the fault segment. However, this method requires matrix mathematical operation, which takes a long time when the distribution network is large in scale [3]. Almeida and Muniz improved the zero-sequence power method and used the zero-sequence active power component to determine the fault segment, which was suitable for the arc suppression coil grounding system.…”

Section: Literature Reviewmentioning

confidence: 99%

Realization of Single-Phase Grounding Fault Location and Recovery Technology in Distribution Network

Zhang

Tang

Zhu

et al. 2022

International Transactions on Electrical Energy Systems

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In order to locate the single-phase-to-ground fault in distribution network, a research method of single-phase-to-ground fault location and recovery technology in distribution network is proposed. According to the characteristics of single-phase-to-ground fault in distribution network, the fault characteristics of zero-sequence current and three-phase current transient records are extracted by generalized S transform of correlation coefficient, and multi-source redundant information is formed. Fuzzy C-means clustering analysis method is used to fuse multiple fault features online location strategy. The simulation results show that the fuzzy clustering based on FCM changes continuously with the accumulation of samples, and the sample center changes with the enrichment of the samples. When the arc suppression coil is grounded with different initial phase angle transition resistance and intermittent fault, the state of each measuring point can be correctly identified, and the accurate energization rate is 97%. The test results show that the system can achieve accurate positioning for all sections.

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Section: Literature Reviewmentioning

confidence: 99%

Realization of Single-Phase Grounding Fault Location and Recovery Technology in Distribution Network

Zhang

Tang

Zhu

et al. 2022

International Transactions on Electrical Energy Systems

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“…These curves enable the determination of the generation value of photovoltaic systems, using equations ( 13) -( 15) available in the OpenDSS software. Many distribution companies worldwide run this software, and in Brazil, it is recommended by the regulatory agency in studies of distribution systems [47].…”

Section: Tests and Resultsmentioning

confidence: 99%

A Novel Methodology for Reducing Excessive Reactive Power Consumption Penalties for Photovoltaic Prosumers

Vargas,

Gabriel Borges,

Vicentini

et al. 2024

IEEE Access

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The present paper proposes a new methodology to solve a problem in the literature in which a consumer becomes eligible for reactive power excess charging (RPEC) after installing a photovoltaic (PV) system, even if its reactive demand has not changed. This problem mainly affects this kind of consumer, which is known as PV prosumers, in countries where the power factor at the point of common coupling (PCC) is used as the main parameter in calculating reactive power excess charges instead of directly pricing the surplus reactive energy delivered from the distribution network. The classical approaches to reducing or eliminating RPEC are based on providing reactive power within the consumer's installations from their PV inverters and their capacitor banks. However, the solutions presented require optimization studies since the costs of producing reactive energy can be even higher than the penalties involved. In this context, we developed a new hourly-based optimization model for the RPEC problem based on the variable neighborhood search meta-heuristic and the Fibonacci search method. In addition, we apply the proposed methodology to two medium voltage prosumers in Santo André, Brazil. The results showed the proposal's effectiveness, mitigating RPEC and minimizing the prosumers' electricity bills without installing new equipment to supply their reactive demand. The best results were found when reactive power was delivered by the capacitor bank and PV inverters simultaneously rather than applying these solutions separately. The proposed hourly-based correction method can help in day-ahead energy management, avoiding premature wear from switching the consumer's reactive power compensation equipment switches. Also, the methodology proposal improved the power factor at the utility substation, which benefits the power distribution systems.

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“…The authors reported issues related to DER backfeed-induced NP trip and proposed a generalized current differential protection method to protect sections of the primary feeder selectively. In [4], the authors illustrated the DER backfeed-induced NP trip issue using the OpenDSS simulation study of a Brazilian 81-bus test system and the IEEE LVNTS. With respect to prior works, the key contributions of this Part 2 paper are summarized as the following: (1) One commonly used NP relay hardware is interfaced with RTDS to perform HIL protection studies.…”

Section: Introductionmentioning

confidence: 99%

Protection and Control Challenges of Low-Voltage Networks with High Distributed Energy Resources Penetration - Part 2: Impact Assessment and Mitigation Strategy

Cheng¹,

Udren²,

Holbach³

et al. 2023

Preprint

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<p>This is the second part of a two-part paper series. In the Part 1 paper, the authors summarize the utility workshop outcomes and low-voltage network modeling approaches. In this Part 2 paper, we developed and validated an accurate network protector relay model and interfaced a commonly used network protector relay hardware with our real-time simulation system. Hardware-in-the-loop protection studies are performed to assess the impact of distributed energy resources and benchmark a mitigation strategy. Simulation results suggest that the network protector reverse trip and auto-reclose functions are negatively impacted by the high distributed energy resource penetration. To accommodate DER backfeed while remaining secure and reliable for faults on primary feeders, we recommend options for a rate-of-change-based blocking scheme and a protection setting change. Finally, future mitigation ideas and standard revisions are discussed.</p>

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Analysis of Power Flow Reversion in Distribution Transformers Due to Medium-Voltage Fault and Distributed Generation in Secondary Networks

Cited by 7 publications

References 28 publications

Realization of Single-Phase Grounding Fault Location and Recovery Technology in Distribution Network

Realization of Single-Phase Grounding Fault Location and Recovery Technology in Distribution Network

A Novel Methodology for Reducing Excessive Reactive Power Consumption Penalties for Photovoltaic Prosumers

Protection and Control Challenges of Low-Voltage Networks with High Distributed Energy Resources Penetration - Part 2: Impact Assessment and Mitigation Strategy

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