Polmai, Sompob

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Polmai, Sompob
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Polmai, S.
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sompob.po@kmitl.ac.th

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    Item type:Publication,
    Experiment on Hierarchical Control Based Power Quality Enhancement for Standalone Microgrid
    (2018-10-22)
    Leng, Darith
    ;
    Polmai, Sompob
    ;
    Soontorntaweesub, Kittichot
    A microgrid is a new paradigm of power grid which has triggered advancement toward a green, intelligent and power efficiency. Due to the intermittent nature of microgrid's resources and the unpredictable power demand, the microgrid's voltage and frequency may experience deviation. Therefore, the decentralized control which could provide a faster response is a must. In this paper, the decentralized hierarchical control is implemented to handle the microgrid issues and enhance the power quality. The first level deals with power sharing between parallel generator. The frequency restoration and energy storage control are implemented in the second level to handle the frequency deviation which results from the high integration of PV. The third level is based on the multiagent system to ensure supply-demand balancing, autonomous decision-making and real-time energy monitoring. A laboratory scale microgrid is build up to verify the proposed control. The experimental results prove the effectiveness of the proposed control throughout various operating condition.
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    Item type:Publication,
    Multi-agent system based real-time control for standalone microgrid
    (2017-11-28)
    Leng, Darith
    ;
    Soontorntaweesub, Kittichot
    ;
    Polmai, Sompob
    The energy crisis and environmental concern lead to widely use of renewable energy sources in form of microgrid. The intermittent nature of the microgrid's sources and the altering behaviors of loads result to unstable of the system's voltage and frequency as well as the system reliability. The purpose of this paper is to develop real-time control based decentralizing technique for handling the challenging issues of the microgrid. Two levels distributed control is proposed. A modify droop control and frequency restoration is implemented as low-level control. The upperlevel, a multiagent system is developed and it is the main control method in the research. The agents are implemented using Boris based on C#.NET language. The multiagent system consists of four main agents such as CONTROL agent, DER Agent, RENEW agent and LOAD agent. To evaluate the control performance, the microgrid testbed has been built. The results prove the effectiveness of real-time control to stabilize, monitor, improve system reliability and provide the microgrid intelligent operation.