A Novel Reclosing Scheme for Mitigation of Distributed Generation Effects on Overcurrent Protection

Wheeler, Keaton A.; Elsamahy, Mohamed; Faried, S.O.

doi:10.1109/tpwrd.2017.2743693

Cited by 37 publications

(27 citation statements)

References 10 publications

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“…Inclusion of a DER will causes bidirectional power flows in the distribution system. It reduces the possible upper and lower limits of fault current along with reduction in the fault current through protective devices posing serious threat to the conventional protection coordination [10].…”

Section: Need Of Renewable Energy Sources (Res)mentioning

confidence: 99%

Microgrid Protection Systems

Ramamoorty¹,

Lalitha²

2019

Micro-Grids - Applications, Operation, Control and Protection

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Micro grids are miniature version of conventional large power grids functioning either autonomously or with inter connection to the main grid. Primary function of micro grid is to serve power at distribution level. Distributed energy resources (DERs) connected to the micro grid enables reliable and efficient operation of micro grid. Protection of micro grids assumed importance due to increased penetration of distributed energy resources. Most of the distribution systems in earlier days are radial in nature and protection systems are designed for that. These protection systems pose serious challenges when applied to present day distribution systems which are mesh connected and fed by the distributed energy resources. Limitation of the conventional protection scheme demands new insights and methodologies for micro grid protection. Due to intermediate current injection from DERs the conventional coordination of over current (O/C) relays is not possible. Further in meshed systems the fault current flow is bidirectional. Hence the protection of micro grid systems with DERs require different approach to ensure faults are cleared in less time and minimal number of consumers connected to the system are affected. A comprehensive analysis of the suitable techniques applicable for micro grid protection is presented in this chapter.

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Section: Need Of Renewable Energy Sources (Res)mentioning

confidence: 99%

Microgrid Protection Systems

Ramamoorty¹,

Lalitha²

2019

Micro-Grids - Applications, Operation, Control and Protection

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“…However, extra protection needs to be considered to avoid from permanent faults from damaging the equipment [119]. e.…”

Section: Other Protection Strategiesmentioning

confidence: 99%

Progress on Protection Strategies to Mitigate the Impact of Renewable Distributed Generation on Distribution Systems

et al. 2017

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Abstract:The benefits of distributed generation (DG) based on renewable energy sources leads to its high integration in the distribution network (DN). Despite its well-known benefits, mainly in improving the distribution system reliability and security, there are challenges encountered from a protection system perspective. Traditionally, the design and operation of the protection system are based on a unidirectional power flow in the distribution network. However, the integration of distributed generation causes multidirectional power flows in the system. Therefore, the existing protection systems require some improvement or modification to address this new feature. Various protection strategies for distribution system have been proposed so that the benefits of distributed generation can be fully utilized. This paper reviews the current progress in protection strategies to mitigate the impact of distributed generation in the distribution network. In general, the reviewed strategies in this paper are divided into: (1) conventional protection systems and (2) modifications of the protection systems. A comparative study is presented in terms of the respective benefits, shortcomings and implementation cost. Future directions for research in this area are also presented.

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“…Reference [18] suggests closing the tie-switch 15 ms before circuit breakers trip to isolate the fault segments, to make sure DGs can maintain grid-connected power generation during and after faults, but, closing the tie-switch at the presence of faults may result in overvoltage or overcurrent, and the coordination between protection devices for actions in a ms places high requirements on the communication system and the circuit breakers. Reference [19] proposed a strategy of output matching of DGs through the local controllable load bank when they are disconnected, in order to maintain their status before the fault without immediate stopping, and realize fast reconnection by reclosing as the power is recovered. Instead of changing the structures and settings of existing DN-side protection system, this strategy further expands the application level of DGs, and directly reduces the costs of DG stopping and restart.…”

Section: Introductionmentioning

confidence: 99%

A Doubly-Fed Induction Generator Adaptive Control Strategy and Coordination Technology Compatible with Feeder Automation

Tian

Hao

2019

Energies

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The extensive connection of distributed generation (DG) with the distribution network (DN) is one of the core features of a smart grid, but in case of a large number, it may result in problems concerning the DN-DG compatibility during fault isolation and service restoration, for which no efficient and economic solutions have been developed. This paper proposes a doubly-fed induction generator (DFIG) adaptive control strategy (ACS) and a coordination technology to be compatible with the typical feeder automation (FA) protection logics in the ring distribution system. First of all, an ACS simulating the inertia/damping characteristics and excitation principles of synchronous generators is developed to achieve seamless switching between DFIG grid-connection/island modes, and make distant synchronization possible. Next, a technology coordinating the DFIG islands controlled by ACS and the remote tie-switches based on local inspection of synchronization conditions for closing is developed to achieve the safety grid-connection of DFIG islands in the absence of DN-DG communication. At the last, a detailed simulation scenario with a ring DN accessed by five DFIGs is used to validate the effectiveness of ACS and coordination technology compatible with FA in various faults scenes.

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A Novel Reclosing Scheme for Mitigation of Distributed Generation Effects on Overcurrent Protection

Cited by 37 publications

References 10 publications

Microgrid Protection Systems

Microgrid Protection Systems

Progress on Protection Strategies to Mitigate the Impact of Renewable Distributed Generation on Distribution Systems

A Doubly-Fed Induction Generator Adaptive Control Strategy and Coordination Technology Compatible with Feeder Automation

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