Application of linear programming for optimal coordination of directional over-current relays

Niyomphant, Supawatchara; Leeton, Uthen; Kulworawanichpong, Thanatchai; Chomnawang, Nimit

doi:10.1109/ecticon.2012.6254294

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…The constraint shown in (9) refers to the T relay needed to ensure the selectivity between BP and PP. The constraint shown in (10) prevents that the relay takes a long time to operate, avoiding the equipment damage and the instability of the power system.…”

Section: Constraintsmentioning

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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Section: Constraintsmentioning

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%

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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“…In [16] the basis for the effective application of linear programming to solve the coordination of directional overcurrent relays problem in large-scale transmission systems, only in terms of the time dial setting, is presented. In [9] the authors present an application example of the linear programming approach to solve the same problem. In [4], the coordination problem with additional constraints, when applied to a ring fed distribution system is presented.…”

Section: Introductionmentioning

confidence: 99%

An alternative method for obtaining the optimal directional characteristic angle of directional overcurrent relays in transmission networks

Serna¹,

López-Lezama²

2018

ces

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Directional overcurrent elements, both phase and ground, are widely used as backup protection for transmission lines in interconnected power systems around the world. Traditionally, the specialized literature has focused on the determination of the time dial settings of such elements for improving selectivity, as well as the polarization method to be used, for improving security; leaving the directional characteristic settings, and more specifically, the determination of the directional characteristic angle, to the application of the so-called typical settings. This setting, most commonly known as Maximum Torque Angle (MTA) or Relay Characteristic Angle (RCA), is the basis for the direction determination algorithm. Therefore, it is of paramount importance to establish a methodology for its proper calculation. The main contribution of this paper is an alternative methodology to stablish the MTA/RCA settings of directional overcurrent relays, by using a detailed shortcircuit sensitivity analysis and a non-linear optimization technique. The application of this novel approach on real complex transmission systems increases the reliability of directional overcurrent protection elements, and has shown that the values required by the actual fault conditions of the transmission system could present a large deviation from the so-called typical settings.

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“…The conventional methods can be characterized as trial and error, topological analysis and optimization methods. Linear programming methodologies [8][9][10], nonlinear programming [11][12][13], mixed integer programing [11], sequential quadratic programming [14], simplex and dual simplex [15,16], and analytical technique [17] require large number of iterations to solve the PC settings. The over-all optimal solution cannot be obtained when the conventional methods are…”

Section: Introductionmentioning

confidence: 99%

Protection Coordination Optimization for FREEDM (Future Renewable Electric Energy Delivery and Management) System

Kotb¹,

El‐Saadawi²,

El-Desouky³

2018

JEE

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The FREEDM (future renewable electric energy delivery and management) system is a smart distribution system that facilitates seamless integration of high-penetration DRER (distributed renewable energy resources) and DESD (distributed energy storage devices) with the existing distribution system. Protection schemes have been proposed to detect the overcurrent faults throughout the FREEDM system, according to its requirements. In this paper the time inverse directional over current protection coordination scheme is developed as a backup protection when the primary protection communication failed. The proposed scheme is applied to FREEDM network using conventional mathematical model. To speed up the fault clearing time without coordination loss, the settings of the proposed relays in the two directions are minimized using genetic algorithm. The developed methods are validated using ETAP software. The results ensure that the faults throughout the FREEDM system sections are detected and the relays tripping time are minimized.

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Application of linear programming for optimal coordination of directional over-current relays

Cited by 9 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

An alternative method for obtaining the optimal directional characteristic angle of directional overcurrent relays in transmission networks

Protection Coordination Optimization for FREEDM (Future Renewable Electric Energy Delivery and Management) System

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