대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1999년도 추계학술대회 논문집 전문대학교육위원 P
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- Pages.56-60
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- 1999
무정전 전원공급장치 적용을 위한 PWM 인버터의 Digital 실시간 제어
Real Time Digital Control of PWM Inverter for Uninterruptible Power Supply(UPS) application
- Min, Wan-Ki (Choson College of Science & Technology) ;
- Lee, Sang-Hun (ChungBuk National University) ;
- Choi, Jae-Ho (ChungBuk National University)
- 발행 : 1999.11.20
초록
This paper presents the high performance real time control system of PWM inverter for uninterruptible power supply(UPS). This system is based on a digital control scheme which calculates the pulse widths of the inverter switches for the next sampling time in digital signal processor(DSP). A PI compensator is used to eliminate the voltage error caused by the difference between the actual values of LC filter and those designed. Double regulation loops which are the inner current loop and the outer voltage loop are used to make the transient response time reduce in load disturbance and nonlinear load. This method makes it possible to obtain better response in comparison to conventional digital control system. The proposed scheme provides good performance such as stable operation, low THD of the output voltage, and good dynamic response for load variations and nonlinear load.
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