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고재석(J.S. Gho),조준석(J.S. Cho),강병희(B.H. Kang),최규하(G.H. Choe),곽철훈(C.H. Kwak),정석언(S.E. Chung) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
Compare with diode or thyristor bridge AC/DC converter, the 3 phase PWM converter has some merits of low THD and unit power factor. So, in many critical application like as UPS, using PWM converter is the trends. 3 phase PWM converter had been studied widely already. But analytical design procedure can not found from publication for hardware design and controller design. So, in this paper, 3 phase PWM converter analysis review was given. And from the DC analysis result, parameter design was done. From the AC model, the voltage controller and current controller was designed. The gain of controllers was calculated by analytical method.
조준석(J.S. Cho),강병희(B.H. Kang),고재석(J.S. Gho),최규하(G.H Choe),김진흥(J.H. Kim),정석언(S.E. Chung) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
The parallel operation system of UPS is used to increase reliability of power source at critical load. But parallel UPS system has a few defects, impedance is different from each other and circulating current occurs between UPSs, due to line impedance and parameter variation, though controlled by the same synchronization signal. According to such characteristic of parallel UPS, balanced load-sharing control is the most important technique in parallel UPS operation. In this paper, a novel power deviation compensation algorithm is proposed, it is composed of voltage controller to compensate power deviation that be calculated by using active and reactive current deviation between inverters on synchronous d-q reference frame.
고재석,조준석,강병희,최규하,곽철훈,정석언 건국대학교 산업기술연구원 2001 건국기술연구논문지 Vol.26 No.-
Comparing with diode or thyristor bridge AC/DC converter, It is known that the 3 phase PWM converter has some merits of low THD and unit power factor. In many application such as UPS, it has been a trend to use PWM converter The study on 3 phase PWM converter has already been widely made. However analytical design can not be found from the publications on hardware and controller design. In this paper, the review on analysis of 3 phase PWM converter was made. Through the DC analysis the design of system parameter was made . Through the AC model the voltage and current controller was designed. The gain of controllers was also calculated by analytical method.