The Design And Implementation Of Monitoring System For Grid-tied Photovoltaic Energy

With the increasingly serious problem of environmental pollution and dwindling reserves of conventional energy development and utilization of new green energy has become a hot topic of people. As an inexhaustible, the new non-polluting energy inexhaustible, solar energy is gradually replace coal and other fossil fuels as the main energy the next generation. However, most large-scale solar power station built in the more remote areas, harsh ambient conditions, and the site distribution is concentrated,the staff on duty at the power station not long all sites. This situation has become the promotion of photovoltaic technology a bottleneck. Therefore, an urgent need to propose a high feasibility and good stability control system embodiment of photovoltaic power plants, in order to achieve effective monitoring stations running state.This paper analyzes the two photovoltaic power stations to monitor the physical structure, namely local monitoring subnet and remote central monitoring center, the use of DSP digital information processing, GPRS wireless data communications, computer network technology, was proposed for solar power station the remote monitoring system design. Local monitoring end-use sensors to collect important operating parameters of photovoltaic power stations, and then transmitted via the data processing circuit to the DSP microprocessor. DSP chips received information is analyzed, after processing,transmitted to a remote central monitoring center through GPRS wireless communication network. The main contents of this thesis are as following.First, through the analysis of solar photovoltaic power plant monitoring system design objectives, put forward the overall framework of the monitoring system, and analyzes to explain the working principle of the system, the basic structure and main functions.Second, the proposed design ideas based on local monitoring terminal TMS320F2812 micro-processor, complete the terminal minimum system hardware and software design appropriate programs, and focuses on the monitoring terminal data acquisition circuit module.Third, the analysis of existing communications technology, combined with a photovoltaic power plant monitoring system data transmission characteristics, complete GPRS wireless communication technology based remote monitoring data transmissionmodule design.Fourth, the proposed three-tier monitoring system software functional structure,complete monitoring software interface design, data collection information photovoltaic power stations, warning display of information, as well as key equipment for power stations operating state control.