สมรรถนะของระบบผลิตไฟฟ้าแบบผสมผสานโซล่าเซลล์-เครื่องกำเนิดไฟฟ้า ณ ศูนย์วิจัยสัตว์ป่าฉะเชิงเทรา

Performance of a PV - Generator Hybrid System at Chachoeng - Sau Wild Life Research Station

Name: อุสาห์ บุญบำรุง

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Usa Boonbumroong

keyword: ระบบผลิตไฟฟ้าจากโซล่าเซลล์

Abstract: The PV - generator hybrid system installed at Chachoeng - Sau Wild LifeResearch Station is the only stand alone hybrid system in the country that has beenmonitored and reported. Initial assessment of renewable energy sources at the siteindicates a possibility of using solar, wind and hydraulic energy for electricitygeneration. Solar energy was the first renewable energy source selected.In mid 1995, prior to this research work, a PV - generator hybrid systemwas installed. The PV panels utilized had been previously used for about 5 year.The system was designed to provide a daily electricity load of 21 kWh at thedaily insolation of 2.84 kWh / m*.day. It would have consisted of a 6.3 kWp PV array,a 85.6 kWh battery bank and a 3 kW diesel generator. Due to limited budgets theactual system installed had a 1.1 kWp PV array, a 30 kWh battery - bank and a 3 kWdiesel generator. The system incorporated 2 inverters (2 kW and 6 kW) and 2transformers (2 kW and 3 kW). For operation it was designed such that the PV arraywould provide electricity to the load until the battery voltage was lower than theinverter operating voltage, then the diesel generator would be manually started.At the beginning of the research in mid 1996 it was decided that suchoperation was not appropriate. As the battery bank was undersized, energy was drawnout of the battery to levels lower than the threshold value and then was no adequaterecharging of battery. This resulted in deterioration of some batteries. During thisresearch work two different system operation methods were adopted. First, thegenerator would provide electricity during the peak time ( 18.00 - 22.00 hrs.)while thePV array took care of the remaining time. Later on, a battery charging unit was addedto the diesel generator so that the generator simultaneously provided electricity to loadas well as charging battery.However, the PV system could not provide adequate electricity for the load.Some PV panels were damaged and most batteries had severely deteriorated. The PVarray could not effectively charge the battery bank even when there was enough solarradiation.It is founded that1 . the efficiency of the PV array was about 6 %. This figure is lowcomparing with reports on other PV systems in Thailand. This can be attributed todamaged PV panels, mismatching between panels, non optimum operating point of thePV array with respect to the battery bank, and deteriorated batteries,2 . the utilization factor of the PV array was 2.35 kWh / kWp. This value islow due to the reasons given above.3. The battery life was shortened. This resulted from a daily depth ofdischarge larger than 50 % and inadequate recharging of batteries, and4. the efficiencies of inverters and transformers were less than normalcircumstances owing to their operation below ratings and high harmonics generatedby inverters.In conclusions, the PV and the battery subsystems of this hybrid systemwere undersized. Operation of the system prior to this research had shortened batterylife. This coupled with damaged PV panel resulted in low stability and reliability of thePV subsystem in the hybrid system. We conclude that batteries are a very importantsubsystem that could significantly effect the reliability of a hybrid system operation.Operation and maintenance of batteries should be adequately supervised.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

Email: info.lib@mail.kmutt.ac.th

Name: กฤษณพงศ์ กีรติกร

Role: อาจารย์ที่ปรึกษา

Name: ศิริชัย เทพา

Role: อาจารย์ที่ปรึกษา

Name: ธวัชชัย สุวรรณคำ

Role: อาจารย์ที่ปรึกษา

Created: 2540

Issued: 2005-04-18

Modified: 2560-07-17

วิทยานิพนธ์/Thesis

ISBN: 9746241966

CallNumber: ET340

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: เทคโนโลยีพลังงาน

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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1	ET340.pdf	16.49 MB	913	2025-11-12 12:23:16
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3	ET340ab.smi	3.68 KB	133	2025-09-09 09:04:40

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