태양전지 및 연료전지용 소용량 하이브리드 인버터 설계 및 구현 Design and Implementation of Hybrid Small-Sized Power Inverter for PV and Fuel Cell

태양전지 및 연료전지용 소용량 하이브리드 인버터 설계 및 구현 Design and Implementation of Hybrid Small-Sized Power Inverter for PV and Fuel Cell 指導敎授崔宙燁 이 論文을 工學博士學位請求論文으로 提出함 

 Design and implementation of small-capacity hybrid inverters for solar cells and fuel cells

 Author Jo Sang-yoon 

http://www.riss.kr/link?id=T15112929

Seoul: Kwangwoon University Graduate School, 2019 

 Dissertation Thesis (Doctoral)-- Kwangwoon University Graduate School: Department of Electrical Engineering 2019.2 Year of issue 2019 2018年12月7日

 ABSTRACT

 Design and Implementation of Hybrid Small-Sized Power Inverter for PV and Fuel Cell As a major source of power for robots and drones that emerged as key elements of the Fourth Industrial Revolution era, solar cells, fuel cells, and lithium-ion batteries are receiving spotlight as batteries that can produce high power for long periods of time. Especially, the global market for solar cells and fuel cells is expanding as new and renewable energy sources. While inverter demand is essential for efficient operation of batteries and studies of high-quality inverter technologies such as solar energy, energy storage devices such as robots, drones, etc. As hybrid technologies that supplement solar energy and fuel cells in battery power are commercialized in the U.S., including Japan, it is imperative to study new power converters and control technologies that add green power to secondary batteries. The purpose of this paper is to design and implement a small-capacity hybrid inverter system for solar cells and fuel cells that efficiently operate robots and controllers, communications and various mission equipment by merging solar cells, fuel cells and lithium-ion batteries. To this end, the electrical model for solar cells, fuel cells and lithium-ion batteries is first established and the architecture of the hybrid inverter system is proposed based on these models. After each component has been designed and verified, the entire system is verified and finally the proposed smallcapacity hybrid inverter system is demonstrated by mounting the actual robot's power system. This paper proposes the structure and function of hybrid inverter systems by establishing an electrical equivalent linear model, understanding the power characteristics of solar cells, fuel cells and lithium-ion batteries with different principles of energy generation. Each module proposes a new method of impedance matching maximum power point tracking control technology that is essential to the design of the buck converter for solar cells and fuel cells. It also designs an interleaved, bidirectional DC-DC converter with a high-passing ratio for optimal charging of lithium-ion batteries and proposes an efficiency analysis method in the multiplier mode. In addition, it proposes a two-way DC-DC converter that simultaneously takes into account efficiency and stability. The proposed hybrid inverter system is implemented as a small-capacity hybrid interver system for solar cells and fuel-cells by proving its effectiveness through simulation and practical experiments at the module and system level and by applying it to actual mobile robots. In conclusion, the research proposed a small hybrid inverter system for solar cells and fuel cells provides power conversion solutions suitable for robots, drones, wearable devices, and mobile electronics. Futhermore, Combined with other energy storage devices other than lithium-ion batteries, it is also able to be applied as a power converter for large capacity ESS. Therefore, it presents the possibility of independent products as modules and system technologies for low-cost, long-term, and high-power inverter technologies in the future renewable energy sector.

LINK: http://www.riss.kr/search/detail/DetailView.do?p_mat_type=be54d9b8bc7cdb09&control_no=513893263f37c12effe0bdc3ef48d419&keyword=HYBRID%20INVERTER