Design of portable intelligent photovoltaic system

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Yuansi, Zhang^1,2 ; Nianrong, Zhou^1 ; Lei, Zhou^1,3 ; Lijun, Tang^1,2 ; Shaoquan, Zhang^1

Graduate Workstations of Yunnan Power Grid Corporate, Kunming

650217, China^1

College of Science, Kunming University of Science and Technology, Kunming

650504, China^2

Department of Automation, North China Electric Power University, Baoding

071003, China^3

关键词: Constant current charging;    Fitting parameters;    Mathematical modeling and simulation;    Photovoltaic devices;    Photovoltaic panels;    Photovoltaic systems;    Power conversion efficiencies;    Training parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/5/052025/pdf
DOI  :  10.1088/1757-899X/439/5/052025

来源: IOP

【 摘 要 】

For current photovoltaic devices, the portability is poor, the intelligence of device is low, and the stability of the system and the power conversion efficiency are not high. This design uses the photovoltaic panel as the input. By setting up the battery mathematical model and simulation, the maximum power MPPT is tracked to extend the service life of the photovoltaic cell system. The constant current charging and constant voltage discharge of the battery should be as high as possible to achieve efficient conversion control. The output of the battery is boosted to a stable value through the BOOST circuit, and the DC-DC and DC-AC systems are built separately. DC-DC and DC-AC perform linear regression using the SVM training parameters for the voltage and set values of the BUCK circuit and the inverter. By adjusting the fitting parameters offline, the PWM and SPWM of the BUCK circuit and the inverter circuit are respectively adjusted to meet the use of low-power AC-DC devices. The design of the control section is based on the MSP430F149. When the CPU is idle, it enters a low-power mode to meet the low-power requirements of the PV system. The device realizes the portability of the photovoltaic system and the intelligent voltage output, and the system has a stable conversion efficiency.