• Title/Summary/Keyword: Operating Reserve

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Generating Unit Maintenance Scheduling Considering Regional Reserve Constraints and Transfer Capability Using Hybrid PSO Algorithm (지역별 예비력 제약과 융통전력을 고려한 발전기 예방정비 계획 해법)

  • Park, Young-Soo;Park, June-Ho;Kim, Jin-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.11
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    • pp.1892-1902
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    • 2007
  • This paper presents a new generating unit maintenance scheduling algorithm considering regional reserve margin and transfer capability. Existing researches focused on reliability of the overall power systems have some problems that adequate reliability criteria cannot be guaranteed in supply shortage regions. Therefore specific constraints which can treat regional reserve ratio have to be added to conventional approaches. The objective function considered in this paper is the variance (second-order momentum) of operating reserve margin to levelize reliability during a planning horizon. This paper focuses on significances of considering regional reliability criteria and an advanced hybrid optimization method based on PSO algorithm. The proposed method has been applied to IEEE reliability test system(1996) with 32-generators and a real-world large scale power system with 291 generators. The results are compared with those of the classical central maintenance scheduling approaches and conventional PSO algorithm to verify the effectiveness of the algorithm proposed in this paper.

Optimal Dispatch of Energy and Frequency Regulation Reserve Considering Contingency in a Competitive Electricity Market (경쟁적 전력시장에서 상정사고를 고려한 에너지와 주파수 제어예비력의 최적배분 기법)

  • Lee, Ki-Song;Jeong, Yun-Won;Shin, Joong-Rin;Chun, Yeong-Han;Park, Jong-Bae
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.55 no.5
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    • pp.202-213
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    • 2006
  • This paper presents a new approach for optimal dispatch of energy and frequency regulation reserve considering contingency in a competitive electricity market. It is necessary to introduce the reserve market with the spot energy market for operating efficiently and obtaining the security of the electricity market. However, the reserve market is closely connected with the energy market since the energy and reserve are produced from the same resources. Thus, it is inevitable to co-optimize the energy and ancillary service for efficient operation of energy and ancillary service market. Therefore, this paper proposes a new method for optimal dispatch of energy and frequency regulation reserve considering n-1 contingency of generator and transmission line using constraints and sensitivity based on AC power flow To verify the effectiveness of the proposed method, the numerical studies have been performed for 5-bus sample system and modified IEEE 14-bus system.

A Study on the Establish and Operating Plan of Reserve Components Emergency Response Forces (재난상황 시 예비군 긴급대응부대 창설 및 운용방안에 관한 연구)

  • Seo, SeungBae
    • Journal of the Society of Disaster Information
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    • v.14 no.1
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    • pp.9-16
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    • 2018
  • In the event of a disaster, we need people who specialize in rapid regional disaster recovery. However, in the present disaster response system, disaster relief is carried out at the level of public support, volunteer service, etc. There are various problems such as initial response due to lack of expertise, delays in disaster recovery, and inadequate response to disasters. Therefore, it is necessary to establish a unit with early ability to respond to local governments in the event of a disaster and expertise to enable rapid disaster recovery. Therefore, this study limited the preparation of the reserve forces emergency response units for the direction of local security, disaster relief and disaster relief through emergency disaster recovery under the disaster situation.

Maintenance Scheduling Using PSO Algorithm for Power Plants (PSO알고리즘을 이용한 전력계통의 발전기 예방정비계획 수립)

  • Park, Young-Soo;Jeong, Hee-Myung;Park, Jong-Kook;Kim, Jin-Ho;Park, June-Ho
    • Proceedings of the KIEE Conference
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    • 2007.11b
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    • pp.237-239
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    • 2007
  • This paper focuses on maintenance scheduling using PSO algorithm for power plants from an economic (operating cost) and reliable(variance of operating reserve margin) point of view. We also apply regional reserve margin and transfer capability to maintenance scheduling problem. The proposed method has been applied to IEEE-RTS(1996) with 32-generators and a real -world large scale power system with 291 generators.

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A Study on Supplier's Bidding Strategies including Operating Reserve inan Electricity Market (발전 예비력을 포함한 전력시장에서의 공급자 입찰전략 연구)

  • Shin Jae Hong;Choi Seok Keun;Lee Kwang Ho
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.713-715
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    • 2004
  • In an electricity market with an imperfect competition, participants make plans of biddings and transaction strategies to maximize their own profits. The market price and the quantity are concerned with the operation reserve as well as the bidding system and demand curves in an electricity market. This paper presents a model of the combined market , energy market and operating teserve market. The Nash equilibrium is analyzed by using a hi-level optimization , maximization of Social welfare (SW) and maximization of the producers' profits.

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Reserve distribution to maximize the kinetic energy of a wind power plant (풍력단지의 최대 운동에너지 보유를 위한 예비력 분배)

  • Yoon, Gihwan;Lee, Jinsik;Lee, Hyewon;Kang, Yong Cheol
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.179-180
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    • 2015
  • High wind penetration might cause the frequency stability problem because a wind power plant (WPP) is operating in a maximum power tracking mode to extract the maximal energy from wind and thus does not react to the system frequency variation. Therefore, the system operators encourage a WPP to participate in frequency control, which includes inertia/orl and primary control. The frequency support capability of a WPP depends on the amount of kinetic energy (KE) and reserve. This paper formulates an optimization problem to maximize KE while retaining the required reserve. The proposed optimization problem would allow wind generators (WGs) with a smaller wind speed to retaine more KE. The performance of the proposed optimization problem was investigated in a 100-MW WPP consisting of 20 units of 5-MW permanent magnet synchronous generators using an EMTP-RV simulator. The results show that the proposed optimization problem successfully improves the frequency nadir more than a conventional reserve allocation that distributes WGs proportional to the current output.

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A Study on Requirement of Nuclear Power Plant Load Following Operation Condition Considering Power System Security (계통 안전성을 고려한 원자력발전의 부하추종 요건연구)

  • Lee, Hyun-Chul;Baek, Young-Sik;Lee, Geun-Joon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.11
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    • pp.1565-1570
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    • 2012
  • Nuclear power generation is increasing domestic power supply ratio by lower CO2 emission and fuel prices. Currently, nuclear power generator has been operated with maximum power output. Therefore, nuclear power generator could be no effect to managing the reactive power reserve on power system. The reactive power reserve is calculated to the difference between maximum facility and operation generation capacity of the power system. This paper was proposed that load following of nuclear power is control by using 15-bus power system model. In the simulation result, power system is shown to safety state by operating load following of nuclear power generator. This method has be improved the supplied reliability through economic and efficient operation.

Development of Power System Health Algorithm (전력계통 건전성 지수 알고리즘 개발)

  • Lim, Jin-Taek;Lee, Sung-Hun;Lee, Yeon-Chan;Choi, Jae-Seok;Choi, Hong-Seok;Joo, Joon-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.10
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    • pp.1328-1336
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    • 2014
  • This paper proposes Power System Health Index(PSHI) newly. The paper describes several kind of power system health indices based on two main categories, which are adequacy and security. In adequacy, four kinds of health indices of Frequency, Voltage, Reserve(Operating Reserve Power and Frequency Regulation Reserve Power) and Overload of lines and transformers are proposed. In security, four kinds of health indices of Voltage(154kV, 345kV and 765kV), Overload of lines and transformers, Power flow constraint among areas and SPS are proposed. All indices are mapped with three domains, which are indicated as Health, Margin and Risk, defined with expert interview. While domains of health, margin and risk is defined similar with the conventional well being analysis of power system. The criterion of the domains is proposed using an interview with expert operators and practical reliability codes in Korea. The several kinds of health index functions, which are linear ratio, piecewise linear ration and reverse ratio function etc. are developed in this paper. It will be expected that the developed health indices can help operators to control power system more successfully and also prevent power system from accident as like as black out in future because operator can make a decision immediately based on more easily visual information of system conditions from too much indices acquisition of complex power system.

A Study on Requirement Calculation of MRE Using Wargame Simulation Result (워게임 모의결과를 활용한 전투식량 소요 산정에 관한 연구)

  • Lee, Ki Taek;Choi, Yun Ho;Song, Kyu Hyun
    • Korean Management Science Review
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    • v.30 no.1
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    • pp.125-137
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    • 2013
  • The U.S. Army is capable and ready to deploy full-spectrum armed forces anywhere in the world as we have seen in Iraq and Afghanistan. This commitment is within the realm of logistics support that the readiness to support MRE(Meal Ready to Eat), according to the environment where the operation is on going. ROKA(Republic Of Korea Army) proceeds with the program to develop and reserve various MRE under the assumption of distinctive warfare operating environment. This study investigates to determine the amount of MRE consumption within various operating environment and details are as follows. First we ponder the concept of MRE and identified problems of the existing program. Second we also establish feeding rations by the types of MRE that is the base for calculation. Third we introduce MRE consumption algorithm and formula. Fourth and last we have applied our model to the program and analyzed the results. The present state of the estimation didn't reflect various warfare operating environment. Therefore we simulates theater wargame model to determine the consumption under various warfare operating environment. The result of this study is anticipated to contribute largely to the force enhancement as it mirrors of every circumstances of operating environment.

Source Side Power Factor Correction for Utility Interactive Photovoltaic System (계통연계형 태양광 발전 시스템에서의 전원측 역율 개선)

  • 조영준;김홍성;목형수;최규하;김한성
    • Proceedings of the KIPE Conference
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    • 1997.07a
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    • pp.386-392
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    • 1997
  • Recently, according to developing industry and life style, power consumption have been increased year after year. Currently these much power demand from power consumer is weakening the allowable power reserve margin in summer. As one of the remedies about this problem, the small scale utility interactive photovoltaic system(UIPVS) is considered for auxiliary power source. For this system one of problems to be solved technically, system operating power factor. Generally in case of small scale system, system is operated in unity power factor. But this unity power factor operating mode decrease power factor viewed from utility because UIPVS supply active power to utility. Therefore this paper propose UIPVS with power factor correcting function and this system is analyzed.

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