• Title/Summary/Keyword: EMS(energy management system)

Search Result 153, Processing Time 0.034 seconds

Functional Properties of Stand-alone Microgrid EMS Application (에너지 자립섬 EMS 어플리케이션의 기능적 특성)

  • Lee, Ha-Lim;Chun, Yeong-Han;Chae, Wookyu;Park, Jungsung
    • KEPCO Journal on Electric Power and Energy
    • /
    • v.2 no.1
    • /
    • pp.115-119
    • /
    • 2016
  • For many past years, research in the operation of stand-alone Microgrid, which provides electric power generated from renewable energy sources and energy storage system instead of diesel generators, has been a major issue in order to prepare the exhaustion of fossil fuel and to protect environment, in island grids. Samso Island, known as the world's first stand-alone Microgrid in Denmark, is connected to the mainland grid through AC system, which has different technical conditions with Korea's isolated power system. Korea's first stand-alone Microgrid has been built in Ga-sa island, Chun-la-nam-do, based on Energy Management System (EMS) operation, and other islands are under construction to follow the next step. These stand-alone Microgrid's has large capacity of Battery Energy Storage System (BESS) and the proportion of the renewable energy sources are large, which makes it necessary to use a Microgrid-Energy Management System (MG-EMS) to operate the grid effectively and economically. However, since the main subject of MG-EMS is different from EMS, specific characteristics and functions must be different as well. In this paper, the necessary characteristics and functions are explained for a general MG-EMS compared to a large power system EMS.

Functional Requirements Analysis of Energy Management System (에너지 관리 시스템의 기능 요구사항 분석)

  • Han, Kwan-Hee;Hwang, Bo-Ram
    • Journal of Digital Convergence
    • /
    • v.9 no.6
    • /
    • pp.27-37
    • /
    • 2011
  • Presented in this study is a top-down functional modeling procedure and the desired functionalities of energy management system (EMS). For the purpose of top-down modeling for EMS, energy management system is categorized into 7 subsystems based on common functionalities and energy management life cycle. After that, benchmarking analysis of commercially major EMS products is conducted. As a result of this analysis, desired functionalities of each subsystem of EMS are suggested in this study. This study is served as a useful guidance about essential functional requirements of energy management system to the practitioners involved in the development or introduction of EMS.

Development of Industrial Load Control Algorithm for Factory Energy Management System (F-EMS) under Real Time Pricing Environment (실시간요금제하에서 산업용 수용가의 부하제어알고리즘 개발)

  • Jeon, Jeong-Pyo;Jang, Sung-Il;Kim, Kwang-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.63 no.12
    • /
    • pp.1627-1636
    • /
    • 2014
  • In real-time electricity price environment, the energy management system can provide the significant advantage to the residential, commercial and industrial customers since it can reduce the electricity charge by controlling the load operation effectively in response to time-varying price. However, the earlier studies for load management mainly focus on the residential and commercial customers except for the industrial customers because most of load operations in industrial sector are intimately related with production schedule. So, it is possible that the inappropriate control of loads in industrial sector causes huge economic loss. In this paper, therefore, we propose load control algorithm for factory energy management system(F-EMS) to achieve not only minimizing the electricity charges but also maintaining production efficiency by considering characteristics of load operation and production schedule. Considering characteristics of load operation and production schedule, the proposed load control algorithm can reflect the various characteristics of specific industrial customer and control their loads within the range that the production efficiency is maintained. Simulation results show that the proposed load control algorithm for F-EMS leads to significant reduction in the electricity charges and peak power in industrial sector.

Development of Power Energy Management System for Ships including Energy Saving of Separated Load Systems (개별 부하 시스템의 에너지 절감을 포함한 선박 전력 에너지 관리 시스템 개발)

  • Kang, Young-Min;Oh, Jin-Seok
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.22 no.1
    • /
    • pp.131-139
    • /
    • 2018
  • Many ship researches have been carried out in connection with the fourth revolution, one of which focuses on EMS(energy management system). The EMS is referred to as systems for managing the energy of ships and include various systems. In this paper, we analyze the energy saving field in ship and propose a ship power energy management system including individual load control systems that can save energy in the engine room. EMS includes individual load control systems of PCS (Pump Control System), ERFCS (Engine Room Fan Control System), LCS (Load Control System), HVACS (Heating, Ventilation, Air conditioning Control System). Proposed EMS primarily conserves energy in the individual load systems of the engine room. Secondly, the integrated monitoring and control system is used to control the power generation system and the power load system to save energy.

Design and Implementation of the Script-based EMS for Flexible Management of Stand-alone Microgrid (독립형 마이크로그리드의 유연한 운영을 위한 스크립트 기반 EMS 설계 및 구현)

  • Kim, Joon-Hyoung;Jung, Sung-Hwan
    • Journal of Korea Multimedia Society
    • /
    • v.18 no.10
    • /
    • pp.1231-1240
    • /
    • 2015
  • Nowadays, in islands where electricity should be provided autonomously, stand-alone microgrid technologies using renewable energy such as sunlight generation and wind power generation come into wide use. The microgrid electricity generation using renewable energy is greatly affected by the natural environment of a site. In order to maintain stable electricity supply for fluctuating electricity generation due to natural environment, the energy management via EMS is positively necessary. In existing stand-alone microgrid EMS, system operation logic is not changeable flexibly because compiled or builded codes are released into the EMS of a site, respectively. In this paper, we designed a flexible operating script-based microgrid EMS Framework for various sites and applied it to some island sites. We could confirm its usability.

Application of Energy Storage System for Industrial Customer (산업용 수용가의 에너지저장장치 적용)

  • Hong, Jong-seok;Chai, Hui-seok;Kang, Byoung-wook;Kim, Tae-hyeong;Kim, Jae-chul
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.64 no.7
    • /
    • pp.992-998
    • /
    • 2015
  • The ESS is composed of Battery Package, PCS(Power Conditioning System) Package, BCU(BESS Control Unit). In Jeju smart grid test-bed, we have developed a business model by ESS power system, renewable energy, transportation, such as customers, and have demonstrated above things. We have analyzed the EMS(Energy Management System) model of KPX where manages supply and demand of domestic electrical power system. We modified and launched EMS for microgrid but the cost was expensive and the system was large size. For releasing this system from industry as a whole, it is imperative to develop PMS(Power Management System) for microgrid. However, the cost of EMS for microgrid is expensive, some systems because it is a large development of the all of the first fruits in urgent PMS(Power Management System) for microgrid to be used in industry in general. Therefore, in this paper, we propose the ESS model considering the power systems characteristics and extensibility in korea. and also we propose the PMS to manage the ESS systems.

The Study on Micro-Grid Energy Management System(EMS) Integration in Ulleungdo (울릉도 Micro-Grid EMS(Energy Management System) 구축에 관한 연구)

  • Park, Min-Su;Chun, Yeong-Han
    • Proceedings of the KIEE Conference
    • /
    • 2011.07a
    • /
    • pp.304-305
    • /
    • 2011
  • 이산화탄소의 배출로 인한 지구온난화와 화석연료의 고갈로 인한 에너지난은 신재생 에너지원의 필요성을 증가시켰다. 현재 국내에서는 디젤 발전기로 전력을 공급하는 울릉도 시스템을 신재생 에너지원을 계통에 연계시키는 울릉도 녹색 사업이 진행 중에 있다. 하지만 울릉도는 육지와의 거리가 멀어 계통 연계의 어렵고 신재생 에너지원의 출력 변동성으로 인한 계통운영에 어려움이 예상된다. 울릉도의 안정적인 전력 공급을 위해 Micro-Grid EMS 구축이 요구되는 상황이며 본 논문에서는 Micro-Grid EMS 구축을 위한 방안 및 방향성을 제시하고자 한다.

  • PDF

Introduction of Generator Unit Controller and Its Tuning for Automatic Generation Control in Korean Energy Management System (K-EMS)

  • Park, Min-Su;Chun, Yeong-Han
    • Journal of Electrical Engineering and Technology
    • /
    • v.6 no.1
    • /
    • pp.42-47
    • /
    • 2011
  • Automatic generation control (AGC) is an important function for load frequency control, which is being implemented in Energy Management System (EMS). A key feature of AGC is to back up governors to enhance the performance of frequency control. The governor regulates system frequency in several to ten seconds, while the droop control concept results in steady-state control error. AGC is a supplementary tool for compensation of the steady-state error caused by the droop setting of the governors. As the AGC target is delivered to each generator as an open loop control target, the generator output is not guaranteed to follow the AGC target. In this paper, we introduce generating unit controller (GUC) control block, which has the purpose of enabling the generator output to track the AGC target while maintaining the governor performance. We also address the tuning methods of GUC for better performance of AGC in the Korea Energy Management System (K-EMS).

A Case Study on Operation of Energy Management System Connected with Renewable Energy (신재생에너지 연계형 에너지관리장치의 운영 사례 연구)

  • Cho, Jai Young;Ra, In-Ho
    • Smart Media Journal
    • /
    • v.7 no.2
    • /
    • pp.71-77
    • /
    • 2018
  • This paper proposes the components of the energy management system (EMS) for optimum operation of renewable energy and associated energy storage system (ESS), the functions to be considered in designing, the analysis of operational effects, and finally the reduction of electricity costs. To accomplish the objectives, a lithium-ion battery system and an energy management system have installed in a PV system, and it presents the results analyzed with operation data for a year. To increase the system operation efficiency, we propose the effect that EMS is used to replace the demand power at the peak time with the charge power at the light load time, which suggests the influence of contributing to the charge benefit and load leveling according to the ESS tariff.

Preparation of Reliable Measurement Data by Using State Estimation (상태추정을 이용한 고 신뢰도 측정데이터 확보방안 연구)

  • Kim, Hong-Rae
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.8 no.5
    • /
    • pp.1020-1025
    • /
    • 2007
  • EMS(energy management system) and SCADA(supervisory control and data acquisition) systems are used for reliable and efficient operation of electrical power systems. Various functions in EMS such as power flow, contingency analysis, security analysis essentially need accurate data set for reliable operation. State estimation can be a tool for providing these data. In this paper, programs for observability analysis and bad data processing are developed. Fundamental algorithms are introduced and validity of the proposed techniques is inspected with test cases.

  • PDF