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태양광발전과 계통연계를 위한 Buck-Boost전류원형PWM인버터에 관한 연구
양근령(Geun-Ryoung Yang),강필순(Feel-Soon Kang),김철우(Cheul-U Kim) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
In a utility interactive photovoltaic generation system, a PWM inverter is used for the connection between the photovoltaic arrays and the utility, The dc current becomes pulsated when the conventional inverter system operates m the continuous current mode and dc current pulsation causes the distortion of the ac current waveform, To reduce pulsation of dc input current, This paper presents a Buck-Boost PWM power inverter and its application for residential photovoltaic system, The PWM power inverter is realized by combining two sets of a high frequency Buck-Boost chopper and by making It operate in the discontinuous conduction mode, In this paper, we show the Buck-Boost PWM power inverter circuit, its equivalent circuit and basic differential equations and the power flow characteristics are clarified when the proposed inverter is interconnected with the utility lines, In conclusion, the proposed inverter system provides a sinusoidal ac current for domestic loads and the utility line with unity power factor
선박 보조전원을 위한 저가형 하이브리드 연료전지 시스템 적용 타당성 연구
양근령(Yang, Geun Ryoung),안상용(An, Sang Yong),추진훈(Choo, Jin Hoon) 한국신재생에너지학회 2013 신재생에너지 Vol.9 No.4
This paper proposes the hybrid fuel cell system that can solve disadvantages of existing fuel cell system and ensure high reliability and high stability. The system consists of PEM fuel cell, Ni-MH battery and power management system. In this system, when the power provided from the fuel cell is higher than the load power, the extra energy may be used to charge the Ni-MH battery. When the fuel cell can not provide enough energy to the load, the shortage of energy will be supplied by the Ni-MH battery. Experimental results show that the output voltage is regulated well during load variations. Also, high system efficiency is achieved.