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Solar Controller with Automatic Search Technology for the Maximum Power Point with Autonomy Display

Energy and Power Engineering 2022年第9期14卷 509-522页

作者： Mamadou Sall Ousmane Sow Sega Gueye Gora Diop Lemrabott Habiboullah Mamadou Wade Gregoire Sissoko Ecole Polytechnique de Thiè s Thi&egrave s S&eacute né gal Institut Universitaire de Technologie. Université Iba Der THIAM de Thi&egrave s S&eacute né gal Groupe International de Recherche en Energie Renouvelable(GIRER) Dakar S&eacute né gal Ecole Supérieure Multinationale de Té lé communication Dakar S&eacute né gal

In our work, we have been interested in conducting technological research on the use of photovoltaic energy for lighting. In fact, we have produced a stand-alone photovoltaic system with automatic search for the maximum power point, consisting of a photovoltaic module, a solar regulator, a storage battery and a digital control by microcontroller. The solar field is connected to the input of the regulator and the battery to its output. When the battery voltage is lower than the regulation voltage, the controller operates the photovoltaic generator at maximum power Pmpp and transfers this power to the output. In addition to the protection function, this regulator ensures tracking of the maximum power point (MPPT) and allows the photovoltaic generator to deliver its power whatever the variation of climatic conditions (sunshine and temperature). The main role of the solar regulator is the continuous monitoring of the state of charge of the battery to ensure its protection against overcharging and excessive discharging, the coupling and decoupling of the user as well as its maintenance. The principle of operation is based on controlling a DC-DC converter by a rectangular “PWM” signal generated by a PIC16F874 microcontroller which also controls the entire system. The results of simulation after realization were presented to illustrate the operation of the regulator by curves.

关键词： Index Terms-Battery charge/discharge Regulator PIC16FC874

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Design of a 12 MJ Capacitor Bank of the Pulsed High Magnetic Field Facility at HUST,Wuhan,China

Design of a 12 MJ Capacitor Bank of the Pulsed High Magnetic...

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第11届国际电机与系统学术会议

作者： Hongfa Ding Tonghai Ding Liang Li Houxiu Xiao Tao Peng Xianzhong Duan and Yuan Pan The Pulsed High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China

＜正＞A new facility for experiments in pulsed high magnetic fields up to 80 T is under construction at the Huazhong University of Science and Technology（HUST） in Wuhan,China,funded by the National Development and Reformation Committee（NDRC）. The pulsed power supplies are a modular 12 MJ/25 kV capacitor bank and a 100 MW/100 MJ flywheel pulse generator,and most of field coils are energized by the capacitor bank with thyristor *** capacitor bank consists of 11 independent 1 MJ modules with a shortcut current of each 40 kA and 2 independent 0.5 MJ modules with each 50 *** this paper the design of the capacitor bank,including capacitor,protection coil,discharge switch,crowbar circuit and polarity changing circuit,is explained in *** simulation results of the capacitor bank driving pulse magnets with dual polarity fields are presented.

关键词： Pulsed field capacitor bank crowbar thyristor switch charge/discharge

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