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.
References
More filters
TL;DR: In this paper, the effect of high DG penetration on protective device coordination is explored and an adaptive protection scheme is proposed as a solution to the problems identified, which is implemented on a simulated actual distribution feeder.
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.
590 citations
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.
396 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]....
[...]
...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)....
[...]
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.
112 citations
"Wind Farm Connected Distribution Sy..." refers background in this paper
...Protection schemes, fault identification techniques are discussed in [12-18]....
[...]
TL;DR: In this paper, the authors analyzed all papers related to the topics of Smart Grids and distribution and validated the expectation of an empirical approach in papers using case studies to simulate or conduct pilot runs of the technologies before their massive implementations.
76 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]....
[...]
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.
75 citations
"Wind Farm Connected Distribution Sy..." refers background in this paper
...Protection schemes, fault identification techniques are discussed in [12-18]....
[...]