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Author: search.filters.author.Kularbphettong, K.Subject: search.filters.subject.dc microgrid

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    Analysis of Control System to Prevent Collapse of Mixed-Source DC Microgrid for Industry
    (2020-07-01)
    Boonseng, C.
    ;
    Kularbphettong, K.
    ;
    Boonseng, R.
    This paper presents the control of power sources by lookup table controller to maintain the voltage of critical load and to prevent the collapse of a mixed-source DC microgrid which consists of grid, diesel generators, batteries and solar cells that connect to DC bus. MATLAB is used to a simulation of the microgrid system. The experiment presents the time comparison of four types of switches including magnetic contactor, relay, solid-state relay and power MOSFET which can maintain DC bus voltage in a specified range which least effects to critical load operation. Finally, applied in the data center system of a small factory which has satisfactory results.
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    Design and control of DC microgrids (DCMG) systems for improving reliability and stability of data centers
    (2019-07-01)
    Boonseng, C.
    ;
    Suksawat, D.
    ;
    Kularbphettong, K.
    Distribution systems that depended on de voltages which do not have reactive power loading the lines do not need to synchronize the grid frequency and the equivalent resistance in the conductor tends to be slightly smaller. Therefore, the systems intrinsically tend to become simpler and more efficient. Microgrids and dc distribution systems applied to data centers bring a potentially higher efficiency improvement, due to the penetration of dc-based loads. The paper also examines the ability of a DC microgrid to facilitate provide high degrees of critical load availability. Relation and transfer power between grid, diesel generator and battery are presented. Using PLC and HMI helps to control the switching conditions. In order to be able to maintain the constant voltage at the DC bus at all times, without stopping to disappear or collapse.