• Title, Summary, Keyword: Energy storage system (ESS)

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Development of Operation Scenarios by HILS for the Energy Storage System Operated with Renewable Energy Source (HILS를 이용한 신재생 에너지원이 포함된 에너지 저장시스템의 운영 시나리오 개발)

  • Shin, Dong-Cheol;Jeon, Jee-Hwan;Park, Sung-Jin;Lee, Dong-Myung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.2
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    • pp.224-232
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    • 2018
  • According to government policy, renewable energy facility such as solar power generation is being implemented for newly constructed buildings. In recent years, the introduction of Energy Storage System (ESS) served as an emergency power for replacing an existing diesel generator has been increasing. Furthermore, in order to expand the efficacy of the ESS operation, operation in combination with renewable energy sources such as solar and wind power generation is increasing. Hence, development of the ESS operation algorithms for emergency mode as well as the peak power cut mode, which is the essential feature of ESS, are necessary. The operational scenarios of ESS need to consider load power requirement and the amount of the power generation by renewable energy sources. For the verification of the developed scenarios, tests under the actual situation are demanded, but there is a difficulty in simulating the emergency operation situation such as system failure in the actual site. Therefore, this paper proposes simulation models for the HILS(Hardware In the Loop Simulation) and operation modes developed through HILS for the ESS operated with renewable energy source under peak power reduction and emergency modes. The paper shows that the ESS operation scenarios developed through HILS work properly at the actual site, and it verifies the effectiveness of the control logic developed by the HILS.

A Study on the Economic Analysis Method of Energy Storage System (에너지 저장 시스템(ESS)의 경제성 분석 기법에 관한 연구)

  • Yoon, Young-Sang;Choi, Jae-Hyun;Choi, Yong-Lak;Shin, Yongtae;Kim, Jong-Bae
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.3
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    • pp.596-606
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    • 2015
  • Recently, the government is promoting the new renewable energy spread and expansion policy. To this end, the investment and the research is ongoing on the core of the ESS (Energy Storage System) for the Smart Grid that is being spread around the industrialized countries. US and European countries have also conducted a variety of ESS related systems maintenance and improvement in order to induce the activation of the ESS industry. On the other hand, our country has no law and institutional foundation for the introduction of activation ESS, and there is no objective basis for the economic impact of the introduction of the ESS. Therefore, spread and activation of the ESS is not properly conducted. In this paper, the economics of the ESS based on the Korea electric pricing system for the spread and activation of the ESS effectively proposes a technique for analysis. To do this, define the ESS operating model, and propose the best economic analysis method economic analysis comparing each operating model.

Analysis of Electricity Cost Saving Effect by the Optimal load shifting Operation with 1MWh Redox Flow Battery (1MWh급 레독스흐름전지의 부하이전용 최적운전에 따른 전기요금 절감효과 분석)

  • Baek, Ja-Hyun;Ko, Eun-Young;Kang, Tae-Hyuk;Lee, Han-Sang;Cho, Soo-Hwan
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.7
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    • pp.1151-1160
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    • 2016
  • In recent years, the energy storage systems such as LiB, NaS, RFB(Redox-Flow Battery), Super- capacitor, pumped hydro storage, flywheel, CAES(Compressed Air Energy Storage) and so on have received great attention as practical solutions for the power supply problems. They can be used for various purpose of peak shaving, load leveling and frequency regulation, according to the characteristics of each ESS(energy storage system). This paper will focus at 1 MWh RFB system, which is being developed through the original technology project of energy material. The output of ESS is mainly characterized by C-rate, which means that the total rated capacity of battery will be delivered in 1 hour. And it is a very important factor in the ESS operation scheduling. There can be several options according to the operation intervals 15, 30 and 60minutes. The operation scheduling is based on the optimization to minimize the daily electricity cost. This paper analyzes the cost-saving effects by the each operating time-interval in case that the RFB ESS is optimally scheduled for peak shaving and load leveling.

Design of Smart Plug based Media Platform interlocking with ESS (ESS 연동형 스마트 플러그 기반의 미디어 플랫폼 설계)

  • Kang, Mingoo
    • Smart Media Journal
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    • v.3 no.2
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    • pp.37-42
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    • 2014
  • In this paper, the function design of smart media platform control with smart monitoring, and displaying modules which have the priorities of smart plug based smart outlet, is proposed for electrical suppliance of essential information appliance in emergency power consumption situation(blackout, peaktime etc). The effect of power management will be maximized by this smart gateway interlocking with ESS(energy storage system) which has bi-directional power transmission control modules, and smart outlet based on the priority control actions.

The Study on the Technical Trends of ESS(Energy Storage System) (ESS(Energy Storage System) 기술동향에 관한 연구)

  • Bae, Jin-Yong;Kim, Yong;Kwon, Soon-Do;Lee, Eun-Young;Cho, Kyu-Man;Eom, Tae-Min;Hong, Sung-Jin
    • Proceedings of the KIEE Conference
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    • pp.637-638
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    • 2015
  • This paper review the technical trends of ESS(Energy Storage System). The ESS has been displaced by cathode, anode, electrolyte, and separator. The lithium-ion battery is getting the most attention in the ESS. In this paper, we especially want to review a look at technology trends of the cathode and the separator for lithium-ion battery.

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A Study on the Estimation of Optimal ESS Capacity Considering REC Weighting Scheme (REC 가중치를 고려한 최적 ESS 용량 산정에 관한 연구)

  • Lee, Sungwoo;Kim, Hyoungtae;Shin, Hansol;Kim, Tae Hyun;Kim, Wook
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.8
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    • pp.1009-1018
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    • 2018
  • As the generation of renewable energy increases rapidly, the stability of the grid due to its intermittency becomes a problem. The most appropriate way to solve this problem is to combine and operate the renewable generators with the ESS(Energy Storage System). However, since the revenues of operating the ESS are less than the investment cost, many countries are implementing various incentive policies for encouraging investment of the ESS. In this paper we estimated optimal capacity of the ESS to maximize profits of renewable energy generation businesses under the incentive policy of Korea and analyzed the impact of the incentive policy on the future electric power system of Jeju island. The simulation results show that the incentive policy has significantly improved the profitability of the renewable energy businesses generation business. But the volatility of the net demand has increased as the energy stored in the ESS is discharged intensively at the time of the incentive application.

A Study on System Structure and GUI Implement for Secure ESS use (안전한 ESS 사용을 위한 System 구조와 GUI 구현에 관한 연구)

  • Kim, Wantae;Kim, Hyunsik;Park, Byungjoon
    • Journal of the Korea Society of Digital Industry and Information Management
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    • v.15 no.2
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    • pp.11-17
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    • 2019
  • As interest in the efficiency use of energy has been recently rising, studies have been performed in utilizing various types of eco-friendly green energy and natural energy. Especially there has been rapidly increase in the fields using ESS (Energy Storage System), which is the technology for storing the energy from nature. The application fields of ESS is continuously growing and expanding to various types of technologies. However, in recent years there have been continuing problems with the safety of ESS. And related researches are going on. In this paper, we has proposed a system structure to utilize more secure ESS and has monitored the system status of ESS in real time by using smart phone app. This paper has also proposed a new method to configure secure ESS by implementing GUI (Graphical User Interface) to control the system. And then explain experimental results to investigate the efficiency of the proposed ESS.

Development of a Novel Charging Algorithm for On-board ESS in DC Train through Weight Modification

  • Jung, Byungdoo;Kim, Hyun;Kang, Heechan;Lee, Hansang
    • Journal of Electrical Engineering and Technology
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    • v.9 no.6
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    • pp.1795-1804
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    • 2014
  • Owing to the reduction in the peak power of a DC railway subsystem, many studies on energy storage system (ESS) applications have received attention. Each application focuses on improving the efficiency and addressing regulation issues by utilizing the huge regenerative energy generated by braking-phase vehicles. The ESS applications are widely divided into installation on a vehicle or in a substation, depending on the target system characteristics. As the main purpose of the ESS application is to reduce the peak power of starting-phase vehicles, an optimized ESS utilization can be achieved by the operating at the highest peak power section. However, the weight of an entire vehicle, including those of the passengers, continuously changes during operation; thus, considering the total power consumption and the discharging point is difficult. As a contribution to the various storage device algorithms, this study deals with ESS on board vehicles and introduces an ESS operating plan for peak-power reduction by investigating the weight of a train on a real-time basis. This process is performed using a train-performance simulator, and the simulation accuracy can be increased because the weight in each phase can be adopted in the simulation.

Ride-Through Technique for PMSG Wind Turbines using Energy Storage Systems

  • Nguyen, Thanh Hai;Lee, Dong-Choon
    • Journal of Power Electronics
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    • v.10 no.6
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    • pp.733-738
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    • 2010
  • This paper deals with a ride-through technique for permanent-magnet synchronous generator (PMSG) wind turbine systems using energy storage systems (ESS). A control strategy which consists of current and power control loops for the energy storage systems is proposed. By increasing the generator speed, some portion of the turbine power can be stored in the system inertia. Therefore, the required energy capacity of the ESS can be decreased, which results in a low-cost system. In addition, the power fluctuations due to wind speed variations can be smoothened by controlling the ESS appropriately. The effectiveness of the proposed method is verified not only by the simulation results for a 2[MW] PMSG wind turbine system, but also by the experiment results for a reduced-scale turbine simulator.

A study on the topology and control method of Solar Hybrid Energy Storage System (태양광-ESS 하이브리드시스템의 토폴로지 및 제어방법에 대한 연구)

  • Kim, JongHoe;Lee, KyungSoo
    • Proceedings of the KIPE Conference
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    • pp.168-170
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    • 2018
  • 소규모 신재생에너지 시스템의 보급 확산과 자가발전 시스템 시장이 확대됨에 따라 친환경 에너지저장시스템(ESS, Energy Storage System)에 대한 기술 요구가 증대되고 있다. 특히 전력변환장치인 컨버터와 인버터에서 발생하는 손실은 무시할 수 없다. 본 논문에서는 태양광-ESS 하이브리드시스템 토폴로지와 제어방법의 특징 및 차이점에 대하여 시뮬레이션을 통한 분석을 진행 하였다.

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