Design Of Monitoring System For Dust Accumulation Of Photovoltaic Panel

Although the photovoltaic power generation technology has already achieved a leapfrog,there are still many difficulties to be solved,especially the impact of photovoltaic panel dust on photovoltaic power generation.In order to reduce the impact of dust accumulation and improve the efficiency of power generation,a real-time monitoring system for photovoltaic panel dust accumulation is designed in this paper,the main work is as follows.Dust collection monitoring system hardware design:The hardware design of the wireless sensor network node mainly completes the design of the dust collection information collection circuit,and uses the light reflection method and the characteristics of the silicon photovoltaic cell to realize the dust collection information collection.,the information collection circuit includes a photoelectric conversion circuit and a signal processing circuit.The 4G and ZigBee gateway micro-controlcircuit includes the use of STM32103F single-chip microcomputer to control the signal transmission of the coordinator.The CC2530is used to form the Zigbee module to complete the RF transceiver.Monitoring system software program design:Using C language programming to complete the CC2530 chipset network and network access program design,various sensor network access and information acquisition program design.CC2530 chip and gateway communication program design,the gateway 4G module uploads information to the PC-side hostcomputer programvia the Internet.Using Visual Studio 2019 and database SQL Server2014 development environment to compile the monitoring interface of the host computer.Based on the design of dust collection sensor information acquisition software,an adaptive weighted fusion estimation algorithm is added to the compilation to achieve accurate monitoring of dust collection information.Dust monitoring system test:The photovoltaic power generation device,photovoltaic power supply system,inverter and load system in the experimental device V-SUN-S4000wind and solar hybrid power generation training platform were applied,and the remote monitoring system for the dust accumulation of photovoltaic panels designed in this paper was constructed A physical platform for dust monitoring.Relying on a physical platform for a month of system testing,the test results show that the error rate of the dust monitoring system is less than 1%.Impact analysis of dust accumulation on output power:Experiments on the influence of different dust accumulation densities on panel output power in the laboratory and outdoors were conducted.The experimental results show that the output power of the panel is the largest under clean conditions,and the output power decreases as the dust density increases.Under natural light,the dust accumulation density of the panel increased by 3g/m~2 output power and the power generation efficiency decreased by 8W and 1%,but when the dust accumulation density reached 12g/m~2,the output power decreased sharply and decreased by23.16W.The experimental results determined that the upper limit of the alarm of the dust monitoring system was 12g/m~2.