• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.100-102
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• 1992

Optimal generation dispatch algorithm is developed using L.P and load dispatch method. The algorithm is composed with three steps. Fist phase, analytical algorithm is adopted to solve to minimize quadratic cost functions which fits well for planning purpose. Second phase uses L.P method for obtain economic redispatch that satisfies line constraints. When there is no solution whitch satisfy line constraints load shedding algorithm solves the problem.

• Proceedings of the KIEE Conference
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• 1997.07c
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• pp.1106-1108
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• 1997

This paper presents a new approach on genetic algorithms to economic dispatch problem for valve point discontinuities. Proposed approach in this paper on genetic algorithms improves the performance to solve economic dispatch problem for valve point discontinuities through combination in penalty function with death penalty, generation-apart elitism, atavism and heuristic crossover. Numerical results on an actual utility system consisted of 13 thermal units show that the proposed approach is faster and robuster than classical genetic algorithm.

• Journal of Electrical Engineering and Technology
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• v.4 no.3
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• pp.301-309
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• 2009

A simple and efficient Lambda logic (${\lambda}-logic$) based algorithm is proposed for the solution of the generator constrained economic dispatch problem when the generating units having prohibited zones. The proposed method solves the economic dispatch (ED) problem that takes into account ramprate limits, transmission losses and prohibited operating zones in the power system operation. The proposed method uses a simple heuristic rule based on average power of prohibited operating zones which produces the feasibility of solution for the restricted operating units. The effectiveness of the algorithm is tested on five different test systems and the performance compared with other relevant methods reported in the literature. In all the cases, the proposed algorithm performs better than the previous existing algorithms with a less computational burden.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.405-406
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• 2008

To maintain reliable and stable power grid the Power Dispatch Center consists of two sections, primary and backup centers. It is necessary that the Backup Dispatch Center stay away from the primary center in case of emergency like terror and natural disaster. The Backup Dispatch Center operates transmission lines outside of Seoul metropolitan area and could perform main center's role when primary center lose control Without building a duplex Power IT system, it would be doubtful to operate both centers efficiently. This paper deals with primary and backup Power IT systems which run two Dispatch Centers and focuses on expectation effects of its duplex system and transferring the Backup system.

• Journal of Electrical Engineering and Technology
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• v.10 no.4
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• pp.1441-1452
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• 2015

This paper proposes a new Hybrid Particle Swarm Optimization (HPSO) method that integrates the Evolutionary Programming (EP) and Particle Swarm Optimization (PSO) techniques. The proposed method is applied to solve Economic Dispatch(ED) problems considering prohibited operating zones, ramp rate limits, capacity limits and power balance constraints. In the proposed HPSO method, the best features of both EP and PSO are exploited, and it is capable of finding the most optimal solution for the non-linear optimization problems. For validating the proposed method, it has been tested on the standard three, six, fifteen and twenty unit test systems. The numerical results show that the proposed HPSO method is well suitable for solving non-linear economic dispatch problems, and it outperforms the EP, PSO and other modern metaheuristic optimization methods reported in the recent literatures.

• Journal of Electrical Engineering and Technology
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• v.10 no.4
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• pp.1415-1421
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• 2015

This paper presents a new algorithm called Quantum-behaved Electromagnetism-like Mechanism Algorithm which is used to solve economic load dispatch of power system. Electromagnetism-like mechanism algorithm simulates attraction and repulsion mechanism for particles in the electromagnetic field. Every solution is a charged particle, and it move to optimum solution according to certain criteria. Quantum-behaved electromagnetism-like mechanism algorithm merges quantum computing theory with electromagnetism-like mechanism algorithm. Superposition characteristic of quantum methodology can make a single particle present several states, and the characteristic potentially increases population diversity. Probability representation of quantum methodology is to make particle state be presented according to a certain probability. And the quantum rotation gates are used to realize update operation of particles. The algorithm is tested for 13-generator system and 40-generator system, which validates it can effectively solve economic load dispatch problem. Through performance comparison, it is obvious the solution is superior to other optimization algorithm.

• Proceedings of the KIEE Conference
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• 1999.07b
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• pp.734-736
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• 1999

The electricity demand has been in the trend of increase for the past 30 years except last year due to economic crisis. The central electrical power dispatch center anticipates each and every hour's electricity demand and dispatch every power plant's output(MW) taking into account of the costs, frequency regulation abilities, locations, reliabilities and so on. to meet the demand as quickly as possible. The large portion of the power plants' output is contolled automatically by the AGC(Automatic Generation Control) function which is a part of the EMS(Energy Manage System) computer in the dispatch center. To receive the electrical power dispatch signal from the EMS, a power plant should have a remote MW control feature in the turbine control system or unit master control system. We investigated the AGC function and a power plant's remote MW control configuration.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.11
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• pp.1748-1751
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• 2012

This paper describes the background of the electrical safety emergency dispatch system and analyzes the operational status of the system. This system is to provide the enhanced electrical safety service to general-purpose electrical equipment users. Annual average of about 6 million cases have been implemented since 2005. In order to enhance electrical safety service and more effectively prevent electrical disasters in future, institutional expansion of the electrical safety emergency dispatch system with keeping budget is necessary. If periodic inspections with a remote monitoring system is applied, the effect of electrical safety will be improved.

• Proceedings of the KIEE Conference
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• 2001.11b
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• pp.173-175
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• 2001

This paper describes the dispatch rules prepared for Korean Wholesale Electricity Market. The dispatch rules set out the procedure for the scheduling and dispatch in the operational timescale. It details the process whereby the KPX produces an operatinal schedule taking into account system and operational limitations-the constrained schedule.

• Proceedings of the KIEE Conference
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• 1998.07c
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• pp.1111-1113
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• 1998

A robust economic dispatch algorithm involving transmission losses is proposed and investigated for a possibility of on-line applications. In this paper, the penalty factors are calculated directly from transposed Jacobian of load flow analysis with advantages of superiority to B-coefficients method based on its computation time and suitability for real time application since the approach is based on a current system condition. The proposed algorithm is systematically handling the generation capacity constraints with transmission losses. Implementation of the algorithm for IEEE systems and EPRI Scenario systems shows that computation time is enough to apply on-line economic dispatch to large power system and production cost is saved compared with the crude classical economic dispatch algorithm without considering transmission losses.