A strategy for protection coordination in radial distribution networks with distributed generators

Zamani, Amin; Sidhu, T.S.; Yazdani, Amirmehdi

doi:10.1109/pes.2010.5589655

Cited by 78 publications

(63 citation statements)

References 8 publications

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“…Therefore, directional overcurrent units have been used to determine the faulty feeder when each feeder embeds several DGs [15,70]. 5 shows a simple three-feeder distribution system with directional O/C relays.…”

Section: Directional O/c-based Protectionmentioning

confidence: 99%

Protection of AC and DC distribution systems Embedding distributed energy resources: A comparative review and analysis

Monadi

Zamani

Candela

et al. 2015

Renewable and Sustainable Energy Reviews

124

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Section: Directional O/c-based Protectionmentioning

confidence: 99%

Protection of AC and DC distribution systems Embedding distributed energy resources: A comparative review and analysis

Monadi

Zamani

Candela

et al. 2015

Renewable and Sustainable Energy Reviews

124

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“…An adaptive method based on multiplying the recloser time dial setting (TDS) by the recloser to fuse current ratio is proposed in [13][14][15]. By modifying the TDS of the recloser fast operation using this ratio, the recloser fast characteristic is shifted downwards from its original characteristic.…”

Section: Introductionmentioning

confidence: 99%

Self-Adaptive Relaying Scheme of Reclosers for Fuse Saving in Distribution Networks with DG

Jamali¹,

Borhani-Bahabadi²

2017

IJPER

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Abstract. With growing penetration of distributed generation (DG) in electrical distribution networks (EDNs), miscoordination between fuse and recloser is more likely. This is the result of change of direction, as well as the magnitude of the fault current in the presence of DG where fuse saving cannot be achievd with standard recloser characteristics. This paper proposes a self-adaptive relaying scheme of reclosing operation for fuse saving in EDNs with DG. The recloser is programmed with a new non-standard characteristic using only the local voltage and current magnitude measurements. The proposed relaying scheme is tested for various fault conditions in a 20 kV Iranian radial EDN containing DG units at different locations. It is shown that the proposed scheme is not affected by the presence of DG units whereas the conventional relays fail the protection coordination. The proposed characteristic maintains proper recloser-fuse coordination for all fault types and different DG conditions. Keywords: Fuse saving, distributed generation, electric distribution network, non-communication protection, self-adaptive relaying scheme IntroductionFuse saving is a common protection strategy that prevents nuisance fuse blowing during transient faults by fast operation of the recloser located at the head of a feeder before the blown up of its downstream fuses. After a predefined time, enough for the fault clearance, the recloser reenergises the feeder and restores the power supply. Since 50% to 80% of faults occurring in electrical distribution networks (EDNs) have transient nature [1], the fuse saving strategy can improve the system security and reliability. By incorporation of distributed generation (DG) units in EDNs, the fault current level and direction can change and cause miscoordination between the recloser and its downstream fuses. The fault current passing through the recloser decreases and at the same time the fuse fault current increases because of the DG contribution to the fuse fault current [2]. Therefore, the fuse may blow up before the fast operation of the recloser.Several methods are presented in the literature for fuse-recloser coordination in the presence of DG. In [3, 4] a complete study is carried out on a test EDN to find the best DG locations and also the best recloser setting to minimise the loss of coordination between the fuse and the recloser under different fault conditions. In order to achive the best location and size of DG, different cases must be studied by changing DG size and location for each possible fault location. This method needs to be tailored for each EDN individually. In addition, any change in the number of DG units, can cause a miscoordination between the recloser and fuses. Thus, it may be very time consuming or even infeasible to find the best DG location and related recloser setting for large EDNs.The method of [5] uses power electronic switches to disconnect all DG units after a fault inception and before any fuse blow up. This method does not require any upgrade of the prote...

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“…The distribution system contains protection devices, e.g., fuses, reclosers, relays, and circuit breakers. These protective devices are coordinated in such a way to interrupt the unidirectional flow of the fault current from the source end towards the fault point [1,2].…”

Section: Introductionmentioning

confidence: 99%

Protection coordination for a distribution system in the presence of distributed generation

Yousaf¹,

Mahmood²

2017

Turk J Elec Eng & Comp Sci

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This paper proposes an effective strategy to overcome the impacts on coordination among protection devices due to distributed generator (DG) integration. Increased fault current magnitude and changes in power flow directions are the major impacts imposed by DGs on a typical distribution system. The recloser-fuse coordination is much influenced upon the integration of DGs. The proposed approach presents the rehabilitation of recloser-fuse coordination for post-DG integration effects using the directional properties of a recloser. The simulation results show that coordination among protection devices can be regained using fast operation of the recloser to design a fuse saving scheme in the scenario of temporary fault occurrence. The designed scheme also works satisfactorily for the isolation of a permanently faulted section of the feeder. This technique is verified by simulation results performed on a real 11-kV radial distribution feeder for different fault locations and DG sizes.

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A strategy for protection coordination in radial distribution networks with distributed generators

Cited by 78 publications

References 8 publications

Protection of AC and DC distribution systems Embedding distributed energy resources: A comparative review and analysis

Protection of AC and DC distribution systems Embedding distributed energy resources: A comparative review and analysis

Self-Adaptive Relaying Scheme of Reclosers for Fuse Saving in Distribution Networks with DG

Protection coordination for a distribution system in the presence of distributed generation

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