• Title/Summary/Keyword: Power management system

Search Result 97, Processing Time 0.12 seconds

Design of a hybrid power management system and cold start simulation in a fuel cell ship with PLECS

  • Oh, Jin-Seok;Kang, Young-Min
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.40 no.5
    • /
    • pp.429-436
    • /
    • 2016
  • Currently, many studies on green ships are under way. Fuel cell (FC) ships are of interest as future low-emission, fuel-efficient vessels. In this paper, a hybrid power management system for an FC ship was designed. The system consists of an FC, a battery, a unidirectional DC/DC converter, a bidirectional DC/DC converter, a filter, an inverter, and a propulsion component. To design the system, we analyze electric sources and converters, and create PLECS models of hybrid power management system. Then, we check the cold start sequence and perform a simulation to understand the characteristics of the hybrid power management system in an FC ship.

The heavy load control of ship's battery connected power management system (배터리 연계형 선박 전력관리시스템의 중부하 제어)

  • Kang, Young-Min;Jang, Jae-Hee;Oh, Jin-Seok
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.21 no.7
    • /
    • pp.1455-1463
    • /
    • 2017
  • Global economy has recorded low growth, low consumption, high unemployment rate, high risk, short boom and long recession. As a result, maritime economy declines and the reduction of maintenance costs is inevitable. Thus, Studies such as green ship, eco ship, and smart ship are being actively conducted to save energy of ship. Power management system that use batteries in green ship is an important research area. In this paper, we analyze the heavy load control of a power management system of a general ship using only a generator, and study a heavy load control algorithm for a battery connected power management system. To study this, a structure of battery connected power management system is proposed and a battery connected power simulator was constructed based on the proposed system. Through the simulator, the operation of the battery according to the heavy load control is defined and confirmed in the battery connected power management system.

Smart Power Management System for Leisure-ship

  • Park, Do-Young;Oh, Jin-Seok
    • Journal of Navigation and Port Research
    • /
    • v.35 no.9
    • /
    • pp.749-753
    • /
    • 2011
  • A leisure ship has a stand-alone type power system, and a generator is in use on this condition. But the generator cannot be operated in condition of leisure activity, ocean measurement and etc, because of environment and noise. Recently, renewable energy system is connected with power system of the leisure-ship for saving energy. The renewable energy system can not supply the stable power to leisure-ship because power generation changes according to weather condition. And most of the leisure ship is operated without methodical power management system. This study's purpose is to develop SPMS(Smart Power Management System) algorithm using the renewable energy (photovoltaic, wind power and etc.). The proposed algorithm is able to supply stable the power according to operation mode. Furthermore, the SPMS manages electric load (sailing and communication equipment, TV, fan, etc.) and reduces operating times of the generator. In this paper, the proposed algorithm is realized and executed by using LabVIEW. As a result, the hour for operating the generator is minimized.

Implementation of Electricity Power Management System for Industries based on USN (USN 기반의 산업용 전력관리시스템 구현)

  • Kim, Min-Ho;Lee, Nam-Gil
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.12 no.4
    • /
    • pp.103-109
    • /
    • 2012
  • In this paper, We suggest electricity power management system which makes a good efficient and minimize wasteness of electricity power. We made electricity power management system based USN(Ubiquitous Sensor Network) for industries, factories, public offices and so on, with optimized system. Simply, we can measure and control electricity power as we plug it outlets. This system can monitor and control electricity power, organizing network of PLC(Power Line Communication) and TCP/IP with the sensor for electricity power. Through the acquisition data, this proposed system can manage and save the electricity power efficiently and also we can connect this system to server, anytime, anywhere with Android phone.

Study for Power Management System using Regenerative Energy in Electric Railway Systems (회생에너지를 이용한 도시철도 전력관리시스템 구축에 관한 연구)

  • Lee, Hansang;Cho, Yoonsung;Kim, Hyungchul;Jung, Hosung
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.63 no.1
    • /
    • pp.191-196
    • /
    • 2014
  • For the large scale of electricity consumer, since the price for the electricity consumption depends on the peak power, the issue for peak power reduction have been being studied widely. Electric railway systems, which is one of the most representative large scale of loads, also has assignment to reduce the peak power since they have high peak power and low energy consumption load characteristics. In the aspect of the economic operation through reduction of peak power, this paper proposes a novel algorithm for power management system in electric railway systems using energy storage.

Variable Priority Number Control of SPMS for Leisure Ship

  • Oh, Jin-Seok;Park, Do-Young
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.36 no.1
    • /
    • pp.141-148
    • /
    • 2012
  • The power system of leisure ship has a character of stand-alone type, so it continuously checks the usable power. Especially, the leisure ship using renewable energy needs to adjust the power consumption of loads according to the usable power. Also, the important loads of leisure ship are different by operation mode. However, current power management system doesnot consider such character. This paper studied load management system of the SPMS(Smart Power Management System) and composed using the smart plug. The SPMS controls the loads depending on a user's pattern and character through variable priority number control. This control algorithm was verified through simulation of assumed user and situation using LabVIEW.

A Study on Development of Internet Based Power Management System Using a Microprocessor (마이크로프로세서를 이용한 인터넷기반 전력관리시스템 개발에 관한 연구)

  • 천행춘
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.28 no.5
    • /
    • pp.746-753
    • /
    • 2004
  • In this paper, the Power Management System(PMS) which based on a decision making system according to power strategy is proposed and implemented. PMS is designed to have functions of power monitoring. controlling, synchronizing load sharing and monitoring of driving engine, etc. PMS consists of the internet communication system(ICS). Remote Management System(RMS) and Sensor Driver System (SDS) ICS transmits the monitoring and supervisory data via Internet to Remote Management System(RMS) in real-time SDS detects various power system data on local generator and utility via I/O interface system. I/O interface system receives various status data and outputs control signals. Implemented PMS is tested with dummy signal to verify proposed functions and shows good results. For future study implemented PMS will be tested under real load condition to merchandize.

Power Management System Simulator Modeling and Characteristics Analysis for Electric Propulsion Ship (LNGC용 Power Management System 시뮬레이터 모델링 및 특성분석)

  • Kim, Youngmin;Jeon, Kyung-Won;Jung, Sang-Yong
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.64 no.6
    • /
    • pp.878-884
    • /
    • 2015
  • In this paper, Power Management System(PMS) simulator for Liquid Nature Gas Carrier(LNGC) is developed. Major components of power system for LNGC, such as generator, diesel engine and governor, transformer, circuit breaker, and 3 phase loads models are built based on MATLAB/SIMULINK. With these designed major parts, PMS simulator modeling is carried out. Based on MATLAB/Graphical User Interface, PMS simulator control for LNGC, and Human Machine Interface for monitoring is designed. PMS simulator for LNGC carries out simulation according to sequence of characteristics analysis. By comparing results of predicted simulation for each sequence to that of characteristics analysis, the reliability of PMS simulator for LNGC will be verified.

Test Platform Development of Vessel's Power Management System Using Hardware-in-the-Loop Simulation Technique

  • Lee, Sang-Jung;Kwak, Sang-Kyu;Kim, Sang-Hyun;Jeon, Hyung-Jun;Jung, Jee-Hoon
    • Journal of Electrical Engineering and Technology
    • /
    • v.12 no.6
    • /
    • pp.2298-2306
    • /
    • 2017
  • A PMS (Power Management System) controls vessel's power systems to improve the system efficiency and to protect a blackout condition. The PMS should be developed with considering the type and the capacity of the vessel's power system. It is necessary to test the PMS functions developed for vessel's safe operations under various sailing situations. Therefore, the function tests in cooperation with practical power systems are required in the PMS development. In this paper, a hardware-in-the-loop (HIL) simulator is developed for the purposes of the PMS function tests. The HIL simulator can be more cost-effective, more time-saved, easier to reproduce, and safer beyond the normal operating range than conventional off-line simulators, especially at early stages in development processes or during fault tests. Vessel's power system model is developed by using a MATLAB/SIMULINK software and by communicating between an OPAL-RT's OP5600 simulator. The PMS uses a Modbus communication protocol implemented using LabVIEW software. Representative tests of the PMS functions are performed to verify the validity of the proposed HIL-based test platform.

A Photovoltaic Power Management System using a Luminance-Controlled Oscillator for USN Applications

  • Jeong, Ji-Eun;Bae, Jun-Han;Lee, Jinwoong;Lee, Caroline Sunyong;Chun, Jung-Hoon;Kwon, Kee-Won
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • v.13 no.1
    • /
    • pp.48-57
    • /
    • 2013
  • This paper presents a power management system of the dye-sensitized solar cell (DSSC) for ubiquitous sensor network (USN) applications. The charge pump with a luminance-controlled oscillator regulates the load impedance of the DSSC to track the maximum power point (MPP) under various light intensities. The low drop-out regulator with a hysteresis comparator supplies intermittent power pulses that are wide enough for USN to communicate with a host transponder even under dim light conditions. With MPP tracking, approximately 50% more power is harvested over a wide range of light intensity. The power management system fabricated using $0.13{\mu}m$ CMOS technology works with DSSC to provide power pulses of $36{\mu}A$. The duration of pulses is almost constant around $80{\mu}s$ (6.5 nJ/pulse), while the pulse spacing is inversely proportional to the light intensity.