• Title, Summary, Keyword: BESS

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Modeling of Battery Energy Storage System at Substation for Load Leveling and Its Economic Evaluation (부하 평준화를 위한 변전소 설치 배터리 에너지 저장장치의 모델 및 경제성 평가에 관한 연구)

  • Cho, Sung-Min;Shin, Hee-Sang;Kim, Jae-Chul
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.7
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    • pp.950-956
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    • 2012
  • As development of battery technologies, the installation of Battery Energy Storage System (BESS) increased. The BESS can be used for various purposes such like frequency response, load leveling, and fluctuation mitigation of renewable energy generators. In this paper, three state BESS model is proposed. the BESS model considering charge, discharge and keeping efficiency, and life cycle according to depth of discharge (DOD). Then, the benefit and cost of BESS installed at substation for load leveling are summarized. The economic evaluation of BESS is analyzed using net present values (NPV) analysis. In case study, the NPV analysis of NaS battery system is carried out using the proposed BESS model. Because the result of economic evaluation of BESS using nowadays cost data is not positive, the sensitivity analysis of BESS is conducted by changing the capital cost and energy cost.

Integrated Control Strategy of Multiple BESS for providing Primary Frequency Control (주파수추종서비스 제공을 위한 다수 배터리전기저장장치(BESS)의 통합제어 전략)

  • Yu, Ga Ram;Choi, Woo Yeong;Kook, Kyung Soo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.7
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    • pp.1169-1175
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    • 2016
  • As an Increased penetration level of renewable resources has caused concerns about primary frequency response, an increase in BESS(Battery Energy Storage System) capacity has been expected because of its fast response to the disturbances in the power system. This paper proposes the Integrated Control Strategy of multiple BESS for effectively providing the primary frequency control in the bulk power systems by coordinating the response, SOC and its recovery of BESS. The proposed strategy prevents multiple BESS from providing exceeding response and keeps the balance between SOC of multiple BESS. In addition, It would recover the SOC of BESS efficiently. The effectiveness of the proposed strategy is verified through various case studies employing Korean power system.

Economic Evaluation for the Domestic Application of the Battery Energy Storage System(BESS) (전지전력저장시스템의 국내적용을 위한 경계성 검토에 관한 연구)

  • Kim, Eung-Sang;Kim, Ho-Yong;Kim, Jae-Chul;Rim, Seong-Jeong
    • Proceedings of the KIEE Conference
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    • pp.610-612
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    • 1995
  • This paper presents the economic evaluation of battery energy storage system(BESS). Application target of the BESS was decided to both the distribution substation and single customer. 1MW/4MWh BESS under research and development in KERI was used for example. We analyzed and compared BESS with conventional combind cycle. The result shows that BESS is more economic than conventional combind cycle.

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Economic Assessment and Introduction Prospect of BESS (전력저장전지시스템(BESS)의 도입전망과 경제성 분석)

  • Eom, Y.C.;Kim, H.Y.;Kim, J.E.;Rho, D.S.;Kim, E.S.
    • Proceedings of the KIEE Conference
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    • pp.393-396
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    • 1991
  • The load factor is continuously decreasing with the increase of the daytime power demand so that the load levelling is required. Since the pumped storage power plant for the load levelling has some problems, new storage techniques such as the battery energy storage system (BESS) had been developed in the early 1980s. The MW BESS had been already interconnected to power system in the developed countries, while the 20KW BESS was developed and is being operated by KERI and KEPCO in our country, the development project of MW BESS is being persued now. Then, it is important to evaluate the economics and prospect of BESS. This paper presents the economic target and introduction prospect of BESS in korea.

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Operation of Battery Energy Storage System for Governor Free and its Effect (주파수추종 운전 적용을 위한 BESS의 운용 방법 및 효과)

  • Cho, Sung-Min;Jang, Byung-Hoon;Yoon, Yong-Bum;Jeon, Woong-Jae;Kim, Chulwoo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.1
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    • pp.16-22
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    • 2015
  • As the development of Battery Energy Storage System(BESS) and the increasing of intermittent energy sources like wind power and photovoltaic, the application of BESS in load frequency control is considered as an effective method. To evaluate the effectiveness of BESS application in frequency control, we defined a governor free model of BESS to conduct dynamic simulation. Using the BESS dynamic model, we implemented the power system dynamic model including steam, gas and hydro turbine generators. In this paper we study the control performance of BESS in primary frequency control. The effect of BESS speed regulation rate and response time on governor free operation is investigated. In addition, we compared BESS from steam turbine generator in view point of frequency regulation.

A Study on the Optimal Operation According to Appropriate PCS and Battery Capacity Estimation of PV-BESS System (PV-BESS 시스템의 적정 PCS, 배터리용량 산정에 따른 최적 운영에 관한 연구)

  • Choi, Yun Suk;Na, Seung You
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.9
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    • pp.1174-1180
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    • 2018
  • In December 2017, the government announced plans to increase the current proportion of renewable energy from 7% to 20% by 2030 through a plan called the Renewable Energy 3020 Implementation Plan. Therefore, the demand for installation of photovoltaic(PV), wind turbine(WT) and battery energy storage system(BESS) is expected to increase. In particular, the system combined with energy storage system(ESS) is expected to take up a large portion since PV and WT can receive high renewable energy certificates(REC) weights when combined with ESS. In this study, we calculate the optimal capacity of the power conditioning system(PCS) and the BESS by comparing the economical efficiency and maximize the efficiency of the PV-BESS system in which the PV and the BESS are connected. By analyzing the system marginal price(SMP) and REC, it maximize profits through application of REC weight 5.0 and optimal charge-discharge scheduling according to the SMP changes.

100kW BESS System using Battery Balancing Circuit (배터리모듈 밸런싱 회로를 적용한 100kW BESS 시스템)

  • Lee, Kyoung-Jun;Lee, Jongpil;Shin, Dongsul;Park, Sungjae;Yoo, Dongwook;Yoo, Jiyoon
    • Proceedings of the KIPE Conference
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    • pp.89-90
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    • 2011
  • 본 논문에서는 스마트그리드 시스템의 안정적인 운전을 위한 핵심적인 요소인 고압의 에너지저장장치를 충방전 할 수 있는 BESS 시스템을 제안한다. 제안한 BESS 시스템용 전력변환장치는 배터리 밸런싱 회로를 적용하여 저압의 배터리 모듈을 직렬로 구성하여 양방향 DC/DC 컨버터 없이 양방향 DC/AC 인버터만으로 BESS 시스템을 구성할 수 있다. 제안한 BESS 시스템의 충방전 시 특성을 살펴보고 50kW급 BESS 시스템을 통해 유용성을 확인한다.

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Development of 50kW PCU for Battery Energy Storage System(BESS) (50kW Battery Energy Storage System(BESS) PCU 개발)

  • Kim, Sung-Hwan;Park, Ju-Hyun;Kim, Ho-Yeol;Kim, Hee-Jung
    • Proceedings of the KIPE Conference
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    • pp.300-301
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    • 2011
  • 전 세계적으로 대체용 예비 전력, 신재생 에너지의 효율 향상, 그리고 가정용 및 충전소용 BESS(Battery Energy Storage System) 시장이 확대되고 있다. 이에 자사에서는 그 동안 축적해 온 인버터 제어 기술과 Know-how를 이용하여 50kW BESS PCU를 개발하였고, 개발된 BESS PCU에 대한 Spec.과 주요 기능에 대해 소개하고자 한다.

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A Study on the Feasibility Analysis and Capacity Estimation of BESS for Self-Starting Generators (자체기동발전원으로서 BESS의 활용가능성 분석 및 용량 산정에 관한 연구)

  • Kim, Cha-Nyeon;Yu, Won-Kun;kim, Heon-Tae;Lee, Heung-Jae
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.9
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    • pp.1119-1124
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    • 2018
  • So far BESS(Battery Energy storage system) has been widely applied to power systems rapidly. Usually it has been used to regulate the renewable energy output and to adjust the power system frequency. In 2013, EPRI has reported a study of utilizing BESS to replace two black start generators of American Electric Power(AEP) that will be demolished. If the BESS can be used as a self-starting generator, it is possible to shorten the long-distance primary transmission line and shorten the restoration time because BESS is capable of the high-speed start and there is no restriction on the installation position. This paper presents a possibility of using BESS as a self-starting generator by using PSCAD/EMTDC in Korean power systems. Herein, the process to estimated the required capacity of BESS is also presented.

Active and Reactive Power Control of the Battery Energy Storage System interconnected with Power Distribution System (배전계통에 연계된 전지전력저장시스템의 유.무효전력 제어)

  • 김재철;문선호;최준호;김응상
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.13 no.4
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    • pp.127-133
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    • 1999
  • Ths paper deals with the active and reactive power control of Battery Energy Storage System (BESS) during its interconnection operation to power distribution system When an interconnection operation of BESS to power distribution system, it is well suited for peak load shaving and distribution voltage compensation by controlling the real and reactive power. Equivalent mxiel of the distribution system and the BESS is derived and power flow equations are presented to control the real and reactive power of BESS. In this paper, to control the active and reactive power of BESS, $P-\delta$ and Q-V control method and ntJIrerical description is presented. To verify the proposed control method, using PSCAD/EMTDC program simulates the active and reactive power control of BESS.f BESS.

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