산업기술연구 (Journal of Industrial Technology)
- 제31권B호
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- Pages.75-79
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- 2011
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- 1229-9588(pISSN)
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- 1598-1371(eISSN)
3상 모듈형 UPS용 PFC 제어기 설계
A PFC Controller Design for 3-Phase Modular UPS
초록
In this paper a new PFC Controller for 3-Phase Modular UPS(Uninterruptible Power Supplies) is proposed. The PFC circuit for 3-Phase Modular UPS is implemented using three 1-phase 3-level boost PFC circuits. To control DC output voltage, single voltage controller considering imbalance of two capacitor voltages and to regulate AC input current three independent current controllers are used in proposed PFC controller. By the proposed method, without additional hardware, THD(Total Harmonic Distortion) of input currents can be readily limited below 5% which is the harmonic current requirements by IEEE std. 519. Its validity is verified by simulations and experiments.