Boonkhun, Churirat

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Preferred name
Boonkhun, Churirat
Alternative Name
Boonkhun, Churirut
Main Affiliation
Email
churirat.bo@kmitl.ac.th

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    Item type:Publication,
    The Impact Study of Electrical Vehicle Charging Stations Loading to Thailand’s Northeast Power System and DRG Integration Planning to Reduce Power Congestion
    (2023-01-01)
    Wannoi, Narumon
    ;
    Wannoi, Chaisit
    ;
    Chompooin-inwai, Chai
    ;
    Jirasuwankul, Nirudh
    ;
    Boonkhun, Churirat
    This article presents the impact study of electrical vehicle charging stations (EVCS) loading to the Thailand’s North eastern power system. Main purposes of this paper are to find the maximum number of EVCS that can be loaded to power system and to rank the critical areas under EVCS load changing by using the repeated power flow calculation technique. Results from the calculation are for the integration planning of distributed renewable generators (DRG) to reduce system congestion. Typically, the critical areas are buses or devices that violate of system control limits. The system control limits are consisting voltage limit and load percentage limit of power transfer devices. All critical areas are needed to improve system stability and reduce system congestion for support the EVCS growing. In this study, The EVCS have been installed on main roads in Thailand’s North-eastern area from Bangkok to Nong-Khai province with a length of 624 km. The EVCS were installed every 50 km, totally 11 stations, and connected to 115 kV substations in the system. The impact study results found that the system experienced with congestion problem on following elements: a) 11 critical buses at 115kV network, b) one critical bus at 230kV network and c) one transmission line is overload to 100 percent at 115kV network when each of EVCS station load increase to 30 MW. In addition, study results reveal that when installed DRG at the right and proper locations, these can reduce congestions situation, reduce system losses and enhance system stability
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    Performance Analysis and Fault Classification in a Large Electric Motor Using Vibration Assessment Technique
    (2021-01-01)
    Suechoey, Boonlert
    ;
    Siriporananon, Somsak
    ;
    Chupun, Pana
    ;
    Boonkhun, Churirat
    ;
    Chompooinwai, Chai
    This research paper presents an analysis of electric motors performance by the assessment of vibration characteristics caused by bearing faults, housing bearing looseness and rotor unbalance. In this study, an analysis of fault that occurred in electric motor has followed ISO 10816-3 Standard. Bring the used electric motors for testing and measuring the vibration of the electric motors by using the Spectrum Analysis & Field Balancing Analyzer model ADASH A440-VA4 Pro. The vibration results of 22kW, 55kW and 75kW motor imply the malfunction of bearing faults, housing bearing looseness, and rotor unbalance. The results obtained from the analysis will be used as references and guidelines for predictions of faults in the electric motors, including maintenance scheduling of electric motors.
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    A novel transmission line's atc assessment method by considering the Generation Dispatch limit (GDL) and renewable generation capacity with power flow sensitivity analysis
    (2019-01-01)
    Wannoi, Chaisit
    ;
    Wannoi, Narumon
    ;
    Boonkhun, Churirut
    ;
    Temiyasathit, Chivalai
    ;
    Chompoo-Inwai, Chai
    This paper presents a novel transmission line's Availability Transfer Capability (ATC) assessment method by considering the Generation Dispatch Limit (GDL) and renewable generation capacity. This method has calculated the power remaining from the Total Transfer Capability (TTC). The TTC in this study is the total generation available declaration of all maximum Generation Shift Factor (GSF) generations to transfer power on transmission line depended on the Power Purchase Agreement of each power generation and of each renewable generation integrated in the system. The maximum GSF generations are defined by using the power sensitivity analysis. Results of this novel method are compared with the traditional transmission line's thermal limit method. Main findings showed that newly proposed method for ATC calculation can be used for the ATC assessment of transmission line and can be a good predictive index to protect power system's voltage stability issue. Moreover, it can be applied to the congestion management scheme with the optimal primary respond generation to control the stability of power transfer on the transmission line.