Optimum Coordination of Overcurrent Relays in Distribution System Using Dual Simplex Method

Bedekar, Prashant P.; Bhide, Sudhir R.; Kale, Vijay

doi:10.1109/icetet.2009.164

Cited by 65 publications

(43 citation statements)

References 5 publications

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“…The faster the fault is isolated, the lower is the thermal and mechanical efforts in the system. In the optimal coordination of OCRs, the objective is to obtain the settings (Ip, TDS, curve types and relay types) that minimize the operational time of the primary protection OCRs [3,[31][32][33]. The optimal settings are directly related to the speed criteria.…”

Section: Objective Functionmentioning

confidence: 99%

“…The most common devices in this category are the overcurrent relays (OCR), fuses and circuit breakers. The OCR are typically used as backup protection, but in some cases, they may be the only type of protection available [3]. As most of the distribution systems are radial, the protection using non-directional OCR is suitable and is widely used because it is simple, effective and cheap.…”

Section: Introductionmentioning

confidence: 99%

“…To solve the OCR coordination problem, classical optimization techniques are used, such as linear programming (LP) [2,3,9] and nonlinear programming (NLP) [10][11][12]. As well as, metaheuristics algorithms (MHAs) have been used.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A high-performance hybrid algorithm to solve the optimal coordination of overcurrent relays in radial distribution networks considering several curve shapes

Kida

Pareja

2016

Electric Power Systems Research

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Section: Objective Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A high-performance hybrid algorithm to solve the optimal coordination of overcurrent relays in radial distribution networks considering several curve shapes

Kida

Pareja

2016

Electric Power Systems Research

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“…Some approaches proposed topology-based approaches like linear graph theory and loop break-point relay locating [4]- [5]. Optimization methods became the tool of choice for researchers, with the problem being formulated as a linear programming problem and solved using the simplex method and its variants [6]. More recently, heuristic techniques have been proposed, with particle swarm optimization (PSO) [7], the genetic algorithm (GA) [8]- [9], evolutionary methods [10] and the harmony search algorithm [11] all being implemented, where the problem was formulated as a non-linear programming (NLP) problem.…”

Section: Introductionmentioning

confidence: 99%

Optimal Protection Coordination for Microgrids With Grid-Connected and Islanded Capability

Najy¹,

Zeineldin²,

Woon³

2013

IEEE Trans. Ind. Electron.

376

192

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Microgrids can be operated either grid-connected to reduce system losses and for peak shaving or islanded to increase reliability and provide backup power during utility outage. Such dual configuration capability imposes challenges on the design of the protection system. Fault current magnitudes will vary depending on the microgrid operating mode. In this paper, a microgrid protection scheme that relies on optimally sizing fault current limiters (FCL) and optimally setting directional overcurrent relays is proposed. The protection scheme is optimally designed taking into account both modes of operation (gridconnected and islanded). The problem has been formulated as a constrained non-linear programming (NLP) problem and is solved using the genetic algorithm (GA) with the static penalty constraint-handling technique. The proposed approach is tested on two medium-voltage networks: a typical radial distribution system and on the IEEE 30-bus looped power distribution system equipped with directly-connected conventional synchronous generators (CSG).

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“…[6]'da enterkonekte güç sistemlerinde optimum yönlü aşırı akım röle koordinasyonu, 8 baralı 14 röleli bir sistemde GA ile yapılmış, ancak çözüm iterasyon sayısının oldukça fazla olduğu dikkati çekmiştir. [7]'de dağıtım sisteminde aşırı akım rölelerinin optimum koordinasyonu için penaltı (Büyük-M) metodu kullanılmış radyal ve ring şebeke uygulamaları yapılmıştır. [8][9][10][11][12]'de aşırı akım rölelerinin koordinasyonunda parçacık sürü optimizasyon algoritmaları (PSO) kullanılmıştır.…”

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Ceza Fonksi̇yonuyla Durdurmali Geneti̇k Algori̇tmalar İle Transformatör Merkezleri̇nde Opti̇mum Aşiri Akim Röle Koordi̇nasyonu

Gürsu¹

2014

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu çalışmada 154 kV transformatör merkezlerinde, güç transformatörü giriş ve çıkış fiderleriyle orta gerilim dağıtım fiderlerinin optimum ters zamanlı aşırı akım röle koordinasyonu, ceza fonksiyonuyla durdurmalı Genetik Algoritmalar (CFD-GA) yöntemiyle yapılmıştır. Yeni bir yöntem olan CFD-GA yönteminin, aşırı akım röle koordinasyonundaki performansına vurgu yapılmıştır. Bu yöntem, selektivite bölgeleri arasındaki zaman farkı esnekliğiyle her çeşit aşırı akım röle koordinasyonu yapabilen bir yöntemdir. CFD-GA ile hem geleneksel ani ayar mecburiyetli hem de ani ayarsız aşırı akım röle koordinasyonu uygulamaları yapılmıştır. Ayrıca, çaprazlama ve mutasyonda yalnız 2 tabanı, yalnız 10 tabanı ve her generasyonda rasgele olarak belirlenen 2 ya da 10 tabanından birini kullanan karışık tabanlı CFD-GA, röle koordinasyonu uygulamalarında karşılaştırılarak, taban performansı belirlenmiştir.Anahtar Kelimeler: Transformatör Merkezi, Koruma, Aşırı Akım, Anisiz Koordinasyon, Genetik Algoritma. OPTIMUM OVERCURRENT RELAY COORDINATION VIA GENETIC ALGORITHM METHOD STOPPED BY PENALTY FUNCTION IN SUBSTATIONS ABSTRACTIn this study, in 154 kV substations, optimum inverse time overcurrent relay coordination of power transformer input and output feeders and of distribution feeders are formed. A new GA method stopped by penalty function (CFD-GA) is utilized at the design stage. The performance of the method is emphasized. This method is able to do all kind of overcurrent relay coordination owing to time difference flexibility between selectivity zones. Overcurrent relay coordinations with both compulsory instant setting and without instant setting are made via CFD-GA. Three kinds of applications are made; Only 2 base, Only 10 base, randomly chosen 2 or 10 base are used in crossover and mutation in each generation. The results of these applications are compared with each other and the base performance is determined.

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Optimum Coordination of Overcurrent Relays in Distribution System Using Dual Simplex Method

Cited by 65 publications

References 5 publications

A high-performance hybrid algorithm to solve the optimal coordination of overcurrent relays in radial distribution networks considering several curve shapes

A high-performance hybrid algorithm to solve the optimal coordination of overcurrent relays in radial distribution networks considering several curve shapes

Optimal Protection Coordination for Microgrids With Grid-Connected and Islanded Capability

Ceza Fonksi̇yonuyla Durdurmali Geneti̇k Algori̇tmalar İle Transformatör Merkezleri̇nde Opti̇mum Aşiri Akim Röle Koordi̇nasyonu

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