Household Solar Power Connected-Grid Generation And Monitoring System

As energy crisis and the environmental pollution getting serious increasingly, different governments around the world pay more attention to the development and utilization of clean and renewable energies and they have been the research focus of different countries. Solar energy which is clean, popular and its quantity many become an important member of clean and renewable energies. As more and more families installing solar panels, it is imperative to make it parallel operated. And the appearance of digital signal processor (DSP) makes the control method of parallel operation for household solar power connected-grid generation further developed and improved. This paper, taking this as the background, researches the core content of household solar power connected-grid generation and monitoring system with the careful study of the previous results. More importantly, it studies on the maximum power point tracking of solar panels and the control methods inverter system and the ways of islanding detection which have the important and practical significance.Firstly, this paper introduces the research and application situation of household solar power connected-grid generation in domestic and international countries, then analysis the gap between our country and the developed countries of the world and introduces several types of solar energy utilization. It combines previous studies and puts forward several solve key points of the household solar power connected-grid generation and monitoring system.Secondly, this paper particularly introduces the work principle of solar cells and gives the equivalent circuit and establishes the mathematical model, and states the influence of external and internal factors on output on the basis of the mathematical model. It gives the P-U, I-U characteristic curve on different conditions and analysis maximum power point tracking principle of solar cell and introduces some common method of maximum power point tracking,?and through the MATLAB simulation results prove the feasibility of the method of the proposed the maximum power point tracking.Then, the classification on inverter system main circuit and control methods will be shown and this paper puts forward the control targets of inverter system and introduces some common control method. Combining with characteristics of this paper, it puts forward the control strategy dominating double-loop control and PWM and the calculation method of PWM adjuster parameters. The results which conducting the simulation experiment with MATLAB system prove the feasibility of the control strategy which is put forward in this paper.At last, the paper introduces the harm of the island effect on grid equipment the maintenance staff and analyzes the causes of the island effect and introduces the general international inspection standard of the islanding detection and analysis its basic principle. Some common passive method of the islanding detection will be involved and according to the shortcomings of the methods and some active islanding detection methods will be put forward.