光伏并网系统稳定性分析及优化分析

Stability Analysis and Optimization Analysis of Photovoltaic Grid-Connected Systems

随着世界工业规模的不断扩大,能源的消耗也越来越高,传统的不可再生的化石能源的大量开采已导致能源危机日益严重,而太阳能作为地球来源最广泛的绿色、无污染可再生能源,正得到越来越多的研究和快速发展,光伏并网在大力推进,相信不久的将来将得到极大的普及。但光伏系统存在一些问题急需解决,否则将给电网造成极大的干扰。由于光伏发电系统中应用到大量的变换器、开关等元器件,给并网系统的运行带来了很大的谐波干扰,而传统并网控制策略有效阻尼区局限问题难以消除该干扰,为了解决此问题,建立了一种新的控制策略模型以提高并网控制效果,提升光伏并网系统的稳定性。

With the continuous expansion of the world's industrial scale,energy consumption is also in-creasing.The extensive exploitation of traditional non renewable fossil fuels has led to an increasingly serious energy crisis.Solar energy,as the most widely used green and pollution-free renewable ener-gysource on Earth,is receiving more and more research and rapid development.Photovoltaic grid-connection is being vigorously promoted,and it is believed that it will be greatly popularized in the near future.However,there are some issues in the photovoltaic system that urgently need to be solved,otherwise it will cause great interference to the power grid.Due to the application of a large number of converters,switches and other components in photovoltaic power generation systems,significant har-monic interference is brought to the operation of grid-connected systems.However,traditional grid-connected control strategies have limited effective damping areas and are dificult to eliminate this interference.To solve this problem,a new control strategy model is established to improve the grid-connected control effect and enhance the stability of photovoltaic grid-connected systems.