Methods for assessing the protection impacts of distributed generation in network planning activities

Mäki, Kari; Repo, Sami; Järventausta, Pertti

doi:10.1049/cp:20080085

Cited by 14 publications

(12 citation statements)

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“…Faults at an adjacent feeder may cause the DG feeder protection to trip when DG unit feeds the fault. In [8] it is said that false tripping can be avoided by coordinating the operation times of feeder relays. Faulted feeder is tripped faster than the DG feeder.…”

Section: Traditional Network Protectionmentioning

confidence: 99%

Benefits of using telecommunication based protection with DG

Voima

Kauhaniemi

2012

CIRED 2012 Workshop: Integration of Renewables Into the Distribution Grid

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As the number of distributed generation (DG) units connected to medium voltage (MV) networks increases the structure of networks is changing and getting more complex. As a result the requirements for protection are getting more and more complicated and are playing an increasingly important role. Protection of DG units with traditional protection schemes causes performance degradation and in some cases sufficient protection levels may become unattainable. In this paper the issues with traditional protection are addressed. The benefits of using of using telecommunication based protection schemes with DG are presented from which the most important advantages are improved selectivity and decreased fault clearing times.

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Section: Traditional Network Protectionmentioning

confidence: 99%

Benefits of using telecommunication based protection with DG

Voima

Kauhaniemi

2012

CIRED 2012 Workshop: Integration of Renewables Into the Distribution Grid

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“…When a real DG interconnection is planned also other voltage quality issues (flicker, harmonics, adverse interactions between voltage regulating devices) and protection issues need to be considered. A planning procedure for protection planning is presented in [12].…”

Section: The Proposed Planning Proceduresmentioning

confidence: 99%

“…If the planning procedures regarding voltage issues (proposed in this paper) and protection issues (defined in [12]) would be both implemented in NIS, almost all DG interconnection studies could be conducted by the DNO using the currently used planning tool (NIS). The procedure regarding protection issues will be implemented in NIS in project ADINE [15].…”

Section: G Further Developmentmentioning

confidence: 99%

Including active voltage level management in planning of distribution networks with distributed generation

Kulmala

Mäki

Repo

et al. 2009

2009 IEEE Bucharest PowerTech

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The existing distribution networks are designed based on the assumption of unidirectional power flows. The amount of distributed generation (DG) is, however, constantly increasing which creates a need to revise the current network operation and planning principles. This paper focuses on voltage level management issues related to DG. The effect of different kinds of voltage level management strategies on distribution network planning is discussed and a planning procedure regarding voltage issues when a new DG unit is interconnected to an existing distribution network is proposed. Index Terms--Active voltage level management, distributed generation, network information system (NIS), network planning

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“…The majority of protection schemes used in modern power system are based upon the short circuit current sensing capability [4] [5]. The main protection issues associated with the introduction of DERs to the distribution network include the blinding of protection, false sympathetic tripping, reclosure-fuse mis-coordination, lapse of inter fuse coordination and failed auto-reclosing [6] [7]. The most widely used form of protection in power system is overcurrent protection.…”

Section: Introductionmentioning

confidence: 99%

Coordination of Overcurrent Relay in Distributed System for Different Network Configuration

Choudhary¹,

Mohanty²,

Singh³

2015

JPEE

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This paper presents a study on protection coordination of overcurrent relays (OCRs) in a distributed system by considering its different operating modes. Two different case studies which are considered in present work for protection coordination include: (i) DG interfaced distribution system in grid connected mode and (ii) DG interfaced distribution system in islanded mode of operation. The proposed approach is tested on the Canadian urban benchmark distribution system consisting of 9 buses. On the occurrence of fault, level of fault current changes which in turn changes the operating time of various OCRs. Therefore, it is important to calculate and suggest method of the relay setting in order to minimize the operating time of relays and also to avoid its mal-operation. In this paper, the protection scheme is optimally designed by taking into account the above mentioned conditions. The operating time of relays can be decreased and, at the same time, coordination can be maintained by considering the optimum values of time dial setting (TDS). Genetic Algorithm (GA) has been used for determining the optimum values of TDS and hence operating time.

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Methods for assessing the protection impacts of distributed generation in network planning activities

Cited by 14 publications

References 0 publications

Benefits of using telecommunication based protection with DG

Benefits of using telecommunication based protection with DG

Including active voltage level management in planning of distribution networks with distributed generation

Coordination of Overcurrent Relay in Distributed System for Different Network Configuration

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