Comprehensive and quantitative analysis of protection problems associated with increasing penetration of inverter-interfaced DG

Jennett, Kyle; Coffele, Federico; Booth, Campbell

doi:10.1049/cp.2012.0091

Cited by 28 publications

(22 citation statements)

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“…This will result in the upstream protection device seeing less current, which could lead to reduced tripping times. In severe cases, it could completely blind the upstream protective device from seeing the fault . The test network was modeled with sequence networks for different types of faults and then simulated to provide a clear understanding of the occurrence of protection blinding.…”

Section: Protection Risksmentioning

confidence: 99%

“…Power systems are based on 3‐phase networks, which differ significantly from single phase networks. Many of the identified challenges in distributed generation (DG) power system protection are based on balanced power systems, with balanced faults and single line representations of the power system . During asymmetrical faults, the current and voltage in the 3 phases will not be equal, and sequence network analysis is required.…”

Section: Introductionmentioning

confidence: 99%

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Maintaining overcurrent protection in a PV-based distributed generation power systems

Walt

Bansal

Naidoo

2018

Int Trans Electr Energ Syst

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Summary The addition of photovoltaic (PV)‐based distributed generators introduces several challenges to power system protection and control engineers. In a multi‐source distribution network, power flow becomes bi‐directional, and conventional overcurrent and earth fault protection schemes are threatened. Addition of PV‐based distributed generation could lead to protection blinding, sympathetic tripping, and loss of coordination in conventional overcurrent protection. This paper evaluates the general concerns regarding protection in a PV‐based distributed generation network, by modeling a power system with sequence networks for different types of faults. The power system is simulated with Digsilent PowerFactory. The results show that many of the general concerns can be mitigated by using sequence components to identify faults. A method is presented to adapt conventional overcurrent protection schemes without the need for communication‐assisted protection.

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Section: Protection Risksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maintaining overcurrent protection in a PV-based distributed generation power systems

Walt

Bansal

Naidoo

2018

Int Trans Electr Energ Syst

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“…The fault current of IIDG is largely determined by its controlling and greatly constrained by the inverter. Thus, the impacts of IIDG on the protection system are considered less than that of ACDG [4,5]. In [6], the typical fault behavior of an inverter was represented by modeling a three wire inverter as two controlled current sources.…”

Section: Introductionmentioning

confidence: 99%

“…In [7], some general conclusions about the impacts of IIDG on the overcurrent protection were obtained. In [4], the influence of fault level, fault location, inverter location and inverter capacity on sympathetic tripping of IIDG was analyzed based on a typical UK distribution system. In [5], the impact of increasing amounts of IIDG on the protection of distribution system was analyzed.…”

Section: Introductionmentioning

confidence: 99%

Allowable capacity of ACDG considering inverse time overcurrent protection

Shang

Tai

Liu

2014

Int. Trans. Electr. Energ. Syst.

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SUMMARYThe integration of distributed generation (DG) into distribution system has a lot of impacts on the original current protection. The influences of alternating current (AC)-connected DG on inverse time overcurrent protection are analyzed in this paper. Based on the setting and coordination principles of protection, four constraints for the allowable capacity of AC-connected DG are advised to ensure the reliability of protection. A specific example is given to show the calculation process. In order to increase the allowable capacity, some improvement methods are proposed. Two different integration points are compared, and finally the one requiring less of protection modification is chosen. The effectiveness of the measures is also verified through the example.

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“…While these problems are more evident when the DG considered are synchronous or induction machines, they are less serious when inverter based DG, which have limited contributions to fault currents, are considered [4][5].…”

Section: Introductionmentioning

confidence: 99%

Feeder protection challenges with high penetration of inverter based distributed generation

2013

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Abstract-The increasing proportion of inverter based distributed generation (DG) in the power system may limit the short circuit power available at distribution substations and consequently cause significant troubles for the protection of distribution feeders where DG are connected. In this paper, the current practices of distribution network operators in dealing with higher penetration levels of DG are investigated and evaluated using a realistic 31-node distribution network model with limited short circuit supply. The paper discusses the challenges for the protection system related to the integration of increasingly significant amounts of DG and highlights the need for more sophisticated protection systems.

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Comprehensive and quantitative analysis of protection problems associated with increasing penetration of inverter-interfaced DG

Cited by 28 publications

References 0 publications

Maintaining overcurrent protection in a PV-based distributed generation power systems

Maintaining overcurrent protection in a PV-based distributed generation power systems

Allowable capacity of ACDG considering inverse time overcurrent protection

Feeder protection challenges with high penetration of inverter based distributed generation

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