An intelligent protection scheme to mitigate the impact of integrating large share wind energy resources in a weak distribution network

Although integration of wind distributed generation directly into the distribution level has considerable advantages, increased penetration of wind distributed generation (renewable distributed generation) alters the network configuration and jeopardizes the protection system operation and system stability; for this reason, necessary changes in power system protection philosophy must be achieved. Modern numerical relays offer extraordinary features and fast and accurate methods for spotting and detecting different unbalanced operating conditions and can be used to mitigate the influence of integrating wind distributed generation into distribution network. In this study, an adaptive directional negative protective scheme was implemented in the medium-level distribution network to investigate and evaluate the performance of protection system and introduce new adaptive protective scheme based on negative overcurrent protection to increase the selectivity and sensitivity of the protection system in case of unbalanced faulty conditions. The medium-level distribution network of Libya Eastern electric network had been implemented in ETAP software to address and evaluate the efficiency of the proposed approach.

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Protection Scheme for Distribution Network with Distributed Generation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.960-961.1376 ◽

2014 ◽

Vol 960-961 ◽

pp. 1376-1380

Author(s):

Chong Xin Xu ◽

Yan Jun Jiao

Keyword(s):

Power Generation ◽

Distributed Generation ◽

Distribution System ◽

Distribution Network ◽

Protection System ◽

Protection Scheme ◽

Network Protection ◽

New Energy ◽

Comprehensive Judgment

Power generation becomes a main way of using new energy. However, the access of distributed generation(DG) causes the ordinary protection system develop a series of problems. In this paper, the structure of distribution network with DG is introduced firstly.Secondly,it is analysed that the effect that DG brings to distribution network protection, and then a new protection scheme of distribution network with DG is put forward. The segment I, II of direction three-current protection on the line which is at the upstream of DG, and the next line’s segment I, II consists of a simple communication unit. Through the comprehensive judgment of two protections’ action results, fault can be isolated in minimum range quickly and accurately. Finally, the correctness and feasibility of the new protection principle are verified by simulating a 10KV distribution system.

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Analysis of the Impact of Distributed Generation on Distribution Network Protection

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.433-440.5924 ◽

2012 ◽

Vol 433-440 ◽

pp. 5924-5929 ◽

Cited By ~ 1

Author(s):

Jie Dong ◽

Ya Jun Rong ◽

Chun Jiang Zhang

Keyword(s):

Distributed Generation ◽

Theoretical Basis ◽

Short Circuit ◽

Distribution Network ◽

Relay Protection ◽

Fault Current ◽

Protection Scheme ◽

Network Protection ◽

The Impact ◽

Short Circuit Condition

With the connection of distributed generation (DG), structure of traditional distribution network changes and original relay protection scheme should be adjusted. On the basis of introducing the concept and advantages of distributed generation, this paper discusses the influence of distributed generation with different position or different capacity on current protection. The paper analyzes magnitude and distribution of fault current under short-circuit condition and change curves of fault current are given, which provides some theoretical basis for new relay protection scheme.

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Integration and Evaluation of the Impact of Distributed Generation on the Protection System of Distribution Network with DG Using Etap

Engineering and Applied Sciences ◽

10.11648/j.eas.20190402.13 ◽

2019 ◽

Vol 4 (2) ◽

pp. 44

Author(s):

Modu Abba Gana

Keyword(s):

Distributed Generation ◽

Distribution Network ◽

Protection System ◽

The Impact

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Optimal placement of distributed generation based on DISCO’s additional benefit using self adaptive levy flight based black widow optimization

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2020-0280 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Naga Lakshmi Gubbala Venkata ◽

Jaya Laxmi Askani ◽

Venkataramana Veeramsetty

Keyword(s):

Distributed Generation ◽

Distribution Network ◽

Additional Benefit ◽

Operating Conditions ◽

Optimal Placement ◽

Lévy Flight ◽

Black Widow ◽

Levy Flight ◽

Simulation Performance ◽

Self Adaptive

Abstract Optimal placement of Distributed Generation (DG) is a crucial challenge for Distribution Companies (DISCO’s) to run the distribution network in good operating conditions. Optimal positioning of DG units is an optimization issue where maximization of DISCO’s additional benefit due to the installation of DG units in the network is considered to be an objective function. In this article, the self adaptive levy flight based black widow optimization algorithm is used as an optimization strategy to find the optimum position and size of the DG units. The proposed algorithm is implemented in the IEEE 15 and PG & E 69 bus management systems in the MATLAB environment. Based on the simulation performance, it has been found that with the correct location and size of the DG modules, the distribution network can be run with maximum DISCO’s additional benefit.

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