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Independent photovoltaic power generation system control strategy and its application

Author: LiMingYang
Tutor: CaoWeiHuaï¼›XuFuCang
School: Central South University
Course: Control Science and Engineering
Keywords: Photovoltaic cell array Lead-acid batteries Based on the three-stage charging method Maximum Power Point Tracking Charging coordinated control strategy
CLC: TM615
Type: Master's thesis
Year: 2010
Downloads: 682
Quote: 8
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Abstract


Due to the shortage of conventional energy , people are starting to focus on the development and application of new energy , especially clean, pollution-free solar photovoltaic technology , which independent photovoltaic power generation system has been widely used . Independent photovoltaic power generation system of traditional charging control strategy to lead to inefficiencies in the system , lead-acid battery aging defects . The research independent photovoltaic power generation system control strategy to solve the above problems is the main content of the paper , the development and utilization of solar energy has an important significance . Firstly, for lead-acid batteries is difficult to completely absorb the photovoltaic cell array output energy issue, the use of lead-acid batteries self-discharge , increasing the acceptable battery charging current discharge pulse - based three-stage charging method , the lead-acid battery is completely absorbed PV cell array to convert electrical energy. Secondly, the array of photovoltaic cells for independent photovoltaic power generation system with lead-acid batteries matching the problem of irrational coordinated control strategy proposed charging and discharging . Charging, discharge pulse - based three-stage charging method to enhance the energy absorption capacity of lead-acid batteries ; maximum power point tracking algorithm , the array of photovoltaic cells , increasing the output of the photovoltaic cell array ; lead-acid battery is nearly full small constant current charging lead-acid battery terminal voltage up to the voltage of the charging point , to determine its state of charge . Discharge , based on the detection of lead-acid battery terminal voltage and estimate the state of charge of lead-acid batteries for dual protection , extending its life . Finally, the proposed control strategy is applied to the design and development of independent photovoltaic power generation experimental system , verified by experiment charging coordinated control strategy can improve the efficiency of the system of independent photovoltaic power generation experiment . In this paper , the charge control strategy is effective , simple , practical, and provides a way for the efficient use of solar energy .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Variety of power generation > Solar power
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