A study on simulator or solar generation and MPPT to improve generation efficiency-태양광 발전시스템 모의를 위한 장치 및 발전 효율을 높일 수 있는 MPPT 연구-KWANGWOON UNIVERSITY

A study on simulator or solar generation and MPPT to improve generation efficiency 태양광 발전시스템 모의를 위한 장치 및 발전 효율을 높일 수 있는 MPPT 연구

 Abstract

 Photovoltaic Generation Simulators and MPPT Strategy to Improve Photovoltaic Power Generation Efficiency in Partial Shadows In this paper, the study is performed to supplement MPPT efficiency in partial solar irradiation and can be simulated with solar power plant power. In order to produce photovoltaic inverter and research of photovoltaic module, a simulation device capable of outputting power of photovoltaic power generation is needed. The characteristic curve differs for each photovoltaic cell and the characteristic curve has a nonlinear characteristic. A power device capable of outputting a curve corresponding to the characteristic curve is needed. We have studied about the characteristic curves of these photovoltaic cells and studied mathematical techniques for expressing curves that can be output according to the module characteristics. In order to use this system effectively, we have implemented a simulation and a device to convert a system AC power to a DC power output from a solar cell using a single phase inverter. In order to maximize the power generation efficiency of the solar photovoltaic system, it is necessary to control the output power at the maximum power point in nonlinear output characteristics. This is called maximum power follow-up control (MPPT). Various MPPT algorithms have been used in the past, but the mismatching phenomenon occurs due to shadow due to the installation location of the PV power plant and surrounding environment. If a mismatching phenomenon occurs, it fails to output at the maximum power point, thereby deteriorating the solar power generation efficiency. In order to increase this, several inverters are used in one inverter to control the solar array partly, and the necessary algorithms are proposed. The power conversion is performed to compare the efficiency of the multiple - boost converter in the mismatching. The validity of the proposed algorithm is verified through simulations and instruments.

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