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계통연계형 태양광발전 시스템이 계통의 전력품질에 미치는 영향
권동철(Dong-Chul Kwon),박중신(Joong-Sin Park),이동영(Dong-Young Yi) 한국조명·전기설비학회 2012 조명·전기설비학회논문지 Vol.26 No.7
In this study, we have investigated the effect of the solar power generation facilities on the power quality of interconnected solar power generation system. When the solar power generation facility was connected to the distribution system, whether the solar power generation is under operation or not, Peak factor of current was increased to 0.033[%], Frequency is deviated from 60±0.2[㎐] and also Short term flicker indication(P<SUB>st</SUB>) increased to 0.213[p.u.] compare with the disconnected situation. Harmonic current [%] in orders was 11.42[%] maximum under 11th orders and was 7.861[%] between 11th and 17th orders. These values were about 3 or 4 times compared with “the power system interconnection technique standards” at the same situation above. Therefore, we could confirmed that the solar power generation facility, when it was connected to the existing distribution system, made bad influence on the power qualities such as the peak factor of current, frequency regulation, short term flicker indication(P<SUB>st</SUB>) and harmonic current [%] in orders etc.
권동철(Dong-Chul Kwon),이동영(Dong-Young Yi) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.9
In this study, we have investigated the effect of the wind power generation facilities on the power quality of interconnected wind power generation system. When the wind power generation facility was connected to the distribution system, whether the wind power generation is under operation or not, voltage variation was increased to 0.34%, peak factor of current was increased to 0.145 and phase difference was increased to 0.6° deviation(2.5 times). Harmonic current % in orders was increased to 29.4%, 14.7% and 3.73% at 3rd, 5th and 9th orders respectively. When the wind power generation facilities were not under operation, harmonic current THD(263.7%) was above the technical criteria of domestic power company(5%) and also, harmonic current % in orders(12.4%, 14.2%, 19.4% and 8.06% at 3rd, 5th, 7th and 9th respectively) were above the technical criteria of domestic power company(below 4% under 11th orders). Therefore, it was confirmed that the wind power generation facility, when it was connected to the existing distribution system, made bad influence on the power qualities.