• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.321-322
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• 2008

Co-optimization of Gen. Speed Governor & AGC are essential to control proper Frequency control & Economic Dispatch. Improper AGC Control result in the decrease of Electricity frequency quality & Generator Life cycle by over-regulating each Generator. This paper presents a number of AGC Area/PLC parameter tuning technique & better performance results. This optimal tuning was studied & implemented by System Operation Dept Korea Power Exchange in 2007.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.648-649
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• 2011

This Paper presents an efficient approach for solving the economic dispatch (ED) problems with valve-point effects using an combination of particle swarm optimization and harmony search. To reduce a premature convergence effect of PSO algorithm, We proposed PSO-HS algorithm considering evolutionary using harmony search algorithm. To prove the ability of the PSO-HS in solving nonlinear optimization problems, ED problems with non-convex solution spaces are solved with three different approach(PSO, HS, combination of PSO and HS)

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.610-611
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• 2011

전력 계통의 운용 계획을 최적화하기 위해서 연간 최대전력수요와 시간별 전력수요에 대한 장단기간의 수요 예측에 관한 연구가 활발하게 진행 중이다. 특히, 단기 수요 예측은 발전비용과 신뢰도에 크게 영향을 주며, 전력계통의 제어 및 단기계획, 경제급전, 전력조류계산 등의 입력 자료로 활용된다. 많은 예측 문제에 폭넓게 사용되고 있는 인공신경회로망은 전력수요 예측에도 자주 쓰이는 기법이다. 본 논문에서는 이를 보다 정확히 하기 위해 기존의 인공신경회로망 기법을 개선하여 보다 정확한 예측을 보였다.

• Proceedings of the KIEE Conference
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• 2007.10c
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• pp.192-194
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• 2007

교토의정서 발효 후 유럽을 중심으로 한 선진국에서는 온실가스 배출권거래제를 국제사회에 보급함으로서 경제적 이익을 창출하고자 한다. 우리나라의 이산화탄소배출량은 세계 상위권 수준이며 이에 대한 대책이 절실히 필요한 시점이다. 철도선진국은 전 세계적으로 대두되고 있는 지구온난화문제를 신속하고 적극적으로 대처하고 있으나 국내 철도부분에서의 온실가스배출저감에 대한 대응은 미흡하다. 본 논문은 현재 철도분야의 대응방안, 철도급전시스템에서 신재생에너지를 이용한 에너지 대체방안과 에너지절약 방안 등을 다룬다.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.53 no.1
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• pp.1-6
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• 2004

This paper suggests an extended power flow analysis algorithm based on a modified economic load dispatch concept. Meaningfully, the proposed method makes it possible to perform the power flow analysis without a slack bus. And the 'equal incremental cost' rule which is obtained by economic load dispatch prior to power flow is maintained even during the proposed power flow analysis. In this paper, both 5 - bus and 14 - bus power systems are used to offer the theoretical accuracy and practical applications of this algorithm.

• Proceedings of the KIEE Conference
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• 2000.07a
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• pp.344-346
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• 2000

The Paper describes the implementation of a quadratic interior point method for optimal power flow involves the determination of the optimal of a given objectives function subject to given constraints. The scheme developed solves the quadratic or linear optimization problem subject to linear constraints. The algorithm has been evaluated on a 14-bus system, and its accuracy and speed are demonstrated.

• Proceedings of the KIEE Conference
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• 2000.07a
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• pp.341-343
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• 2000

Traditionally electric power system are operated in such a way that the total fuel cost is minimized regardless of accounting for tie-lines transmission constraint and emissions produced. But tie-lines transmission and emissions constraint are very important issues in the operation and planning of electric power system. This paper presents the Two-Phase Neural Network(TPNN) to solve the Economic Load Dispatch (ELD) problem with tie-lines transmission and emissions constraint considering transmission losses. The transmission losses are obtained from the B-coefficient which approximate the system losses as s quadratic function of the real power generation. By applying the proposed algorithm to the test system, the usefulness of this algorithm is verified.

• Proceedings of the KIEE Conference
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• summer
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• pp.3-6
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• 2004

전력시장에서 예비력, 송전망 설비 유한성, 열병합발전소 열공급, 수요예측 오차, LNG, 국내무연탄의 우선소비 정책 둥에 의해 경제급전 원칙을 완벽하게 지킬 수 없다. 이로 인하여 고연료비 발전기가 제약에 의해 운전될 수밖에 없고 이 제약발전에 의해 시장가격이 상승하고 소비자 입장에서 보면 전력구입비용이 증가하게 된다. 이 논문에서는 2002, 2003년도 국내전력계통에서 발생한 계통제약 발생현황을 지역별, 월별로 분석하고 2002년 대비 2003계통제약 증가원인을 분석하였다.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.51 no.12
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• pp.603-610
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• 2002

In this paper, a new economic dispatch algorithm for unit commitment is proposed to improve both the accuracy of the final solution and the calculation speed of economic dispatch. By using the inverse incremental cost functions, economic dispatch can be transformed into a simple optimization problem associated with an n-th order polynomial equation. The proposed method remarkably reduces the computation time with adaptability to any higher order generation cost functions. The proposed method is tested with sample system, which shows that the proposed algorithm yields more accurate and economical generation scheduling results with high computation speed.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.366-368
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• 2002

This paper presents a technique that can obtain an optimal solution for the Security-Constrained Economic Dispatch (SCED) problems using the Interior Point Method (IPM) while taking into account of the power flow constraints. The SCED equations are formulated by using only the real power flow equations from the optimal power flow. Then an algorithm is presented that can linearize the SCED equations based on the relationships among generation real power outputs, loads, and transmission losses to obtain the optimal solutions by applying the linear programming (LP) technique. Finally, the application of the Primal Interior Point Method (PIPM) for solving the optimization problem based on the proposed linearized objective function is presented. The results are compared with the Simplex Method and the Promising results ard obtained.