Research And Application Of Photovoltaic Power Grid Technology

As the pressure from global resource and environment protection increases,and the increasingly serious energy crisis. Renewable energy,an a clean energy source.by vigorously enveloping has become a trend. At present, in the distribution network, the number of renewable distributed generation units is increasing,and user’s requirement for good quality power energy is increasing rapidly,building a safe, environment-protecting, economic and smart grid is the common goal for al power energy, industry. Photovoltaic(pv) power generation is renewable,has the advantages of no pollution,and easy for installation, the adaptability of the environment better than other renewable energy. The PV technology is gradually developed and will be the important micro-power source for the smart grid in the future.This paper takes the Hangzhou energy industry park of grid-connected photovoltaic power station as the research object, mainly focuses on likely problems that can easily happen after photovoltaic (pv) integration into grid system, for example, capacity of constantly changing, unusual frequency, island effect, by using PSCAD/EMTDC simulation platform established (pv) power system model, analyzes the actual operation of photovoltaic power station measurement data, and simulates public access points of the fluctuation of voltage and frequency.lt implements the grid photovoltaic power station on the output current harmonic analysis on circuit other load, the influence to identify the different load and power feeder of the harmonic contribution amount. It includes more analysis of photovoltaic power station integration to the electricity grid for distribution network protection and recluses the influence of photovoltaic power station happen when voltage and frequency of the island changes, researches on solution for photovoltaic power station being a lonely island of power network operation micro plan for future grid photovoltaic power station, provides theoretical basis for the construction of the controllable autonomic power grid.