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Proceedings ArticleDOI

Wind Farm Connected Distribution System Protection Using Wavelet-Alienation Coefficient Technique

06 Apr 2018-pp 1-6
TL;DR: This paper deals with an algorithm, based on wavelet-Alienation coefficients for protection of wind farm connected distribution network, which takes the differential current signal of grid node and wind farm coupling node and uses it to identify and categorize the various faults.
Abstract: This paper deals with an algorithm, based on wavelet-Alienation coefficients for protection of wind farm connected distribution network. The proposed algorithm takes the differential current signal of grid node and wind farm coupling node. The Wavelet transform used to extract the approximation coefficients of all the three-phase current signals. Alienation coefficients of each differential phase current obtained over a half cycle is used to identify and categorize the various faults. A modified IEEE13 bus test feeder system used for simulation in MATLAB. Proposed technique tested for detection of all shunt faults at each bus of the distribution system.
Topics: Wavelet transform (56%), Wavelet (54%), Electric power transmission (50%)
References
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Journal ArticleDOI
Abstract: Conventional power distribution system is radial in nature, characterized by a single source feeding a network of downstream feeders. Protection scheme for distribution system, primarily consisting of fuses and reclosers and, in some cases, relays, has traditionally been designed assuming the system to be radial. After connecting distributed generation (DG), part of the system may no longer be radial, which means the coordination might not hold. The effect of DG on coordination will depend on size, type, and placement of DG. This paper explores the effect of high DG penetration on protective device coordination and suggests an adaptive protection scheme as a solution to the problems identified. Results of implementation of this scheme on a simulated actual distribution feeder are reported.

558 citations


Proceedings ArticleDOI
11 Jul 2001-
TL;DR: The effect of DG on protective device coordination such as fuse-fuse, fuse-recloser and relay-relay is explored, finding some margins in which the coordination may hold and certain cases, where no margin is available.
Abstract: Protection of a power system is an extremely important aspect as the duality and scheme of protection decides system reliability, controllability and stability. This paper concentrates on the protection of a distribution system in the light of developments in distributed generation (DG). The conventional distribution system is radial in nature, characterized by a single source feeding a network of down-stream feeders. The protection system has traditionally been designed assuming the system to be radial. After connecting DG, part of the system may no longer be radial, which means the coordination might not hold. The effect of DG on coordination will depend on size, type and placement of DG. This paper explores the effect of DG on protective device coordination such as fuse-fuse, fuse-recloser and relay-relay. In each case, depending on size and placement of DG, there are some margins in which the coordination may hold and certain cases, where no margin is available. These conditions are identified for each case through coordination graphs.

373 citations


"Wind Farm Connected Distribution Sy..." refers background in this paper

  • ...However, the presence of DG, especially in distribution systems, has some disadvantages [2,3]....

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  • ...In the literature, several studies [3,11] indicated that presence of DG effects the selectivity, sensitivity and operational times of the over-current relays (OCRs)....

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Journal ArticleDOI
TL;DR: A new approach of digital relays for transmission line protection is presented, consisting of a preprocessing module based on discrete wavelet transforms in combination with an artificial neural network for detecting and classifying fault events.
Abstract: A new approach of digital relays for transmission line protection is presented. The proposed technique consists of a preprocessing module based on discrete wavelet transforms (DWTs) in combination with an artificial neural network (ANN) for detecting and classifying fault events. The DWT acts as an extractor of distinctive features in the input signals at the relay location. This information is then fed into an ANN for classifying fault conditions. A DWT with quasioptimal performance for the preprocessing stage is also presented.

98 citations


"Wind Farm Connected Distribution Sy..." refers background in this paper

  • ...Protection schemes, fault identification techniques are discussed in [12-18]....

    [...]


Journal ArticleDOI
Abstract: Many different technologies have been growing under the umbrella of Smart Grids, which can be split into three major blocks: generation, transmission, and distribution. Generation and transmission have been evolving and improving as they have been under the control of utility companies, but distribution has been lagging behind on some of these improvements, due to the number of stakeholders involved in the process. With the integration of information and communication technology into the electricity distribution, there has been a spike in research and other studies to prepare for the future. In this paper, we analyzed all papers related to the topics of Smart Grids and Distribution. Because of the novelty of the concept, the results validate the expectation of an empirical approach in papers using case studies to simulate or conduct pilot runs of the technologies before their massive implementations. Strategies are mostly driven by the USA, while other countries are focusing on quality improvements of the already strategized initiatives with an efficiency-related goal in mind. Consumer participation is going to play a key role in the near future as it requires developing a new business model with the inclusion of self-generation and selling-back of excess capacity to the utility company.

73 citations


"Wind Farm Connected Distribution Sy..." refers background in this paper

  • ...Recent technologies in machine design and advanced control strategies leads further improvement in power generation by wind energy [1]....

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Journal ArticleDOI
TL;DR: Both continuous as well as discrete version of informative differential evolution algorithm are used for optimization of relay setting and results are compared with hybrid of genetic algorithm – nonlinear programming and sequential quadratic programming.
Abstract: Growing interconnection in distribution system creates new problem for protection engineers. Particularly the design of overcurrent relay coordination in such system is an independent area of research. With the availability of new artificial based optimization algorithm relay coordination research gain a new momentum. Well established artificial based optimization algorithm such as genetic and particle swam optimization are successfully applied for such applications. This paper discusses the application of informative differential evolution algorithm with self adaptive re-clustering technique for selection of TDS and PSM for optimal coordination of directional overcurrent relays. Both continuous as well as discrete version of informative differential evolution algorithm are used for optimization of relay setting. Proper combination of backup relays for each primary relay are identified by using LINKNET graph theory approach. Coordination of directional overcurrent is developed for 9 bus and IEEE 30 bus distribution systems. The aim of problem is to minimize the total operating time of primary relays and eliminate the miscoordination among the primary and backup relay pairs. Discrete types of settings for electromechanical types of relay are also discussed in this paper. Moreover, the relay coordination problem is modified for providing optimal coordination time interval between 0.2 and 0.8 s among all primary and backup relays pairs. The results are compared with hybrid of genetic algorithm – nonlinear programming and sequential quadratic programming. Digsilient power factory software is used for verification of result.

65 citations


"Wind Farm Connected Distribution Sy..." refers background in this paper

  • ...Protection schemes, fault identification techniques are discussed in [12-18]....

    [...]