摘要
近年来,太阳能发电因其清洁环保等优点展现出巨大的发展潜力。但由于自然环境等因素影响,光伏发电的输出功率极不稳定,极大影响了电网稳定性和可靠性。因此,本文提出一种基于多电池组SOC一致性的光伏功率波动平抑策略,通过调节储能输出功率补偿光伏输出功率超出短期波动率的波动分量,并在补偿过程中以各储能电池荷电状态(state of charge,SOC)差异最小为优化目标,以各电池组充放电状态切换情况及功率分配大小为优化变量,在不削弱补偿效果的前提下,逐渐缩小各电池组的SOC差异,并改善电池组充放电状态的频繁切换情况。最后采用Matlab软件搭建平抑策略仿真平台进行实验,结果表明本文所提策略能够实现预期目标。
In recent years,the solar power generation shows great potential for development due to its such advantages as clean and environmental protection. However,the output power of the photovoltaic generation is very unstable due to the influence of factors such as natural environment etc,which affect greatly stability and reliability of the power network. Therefore,a kind of stabilization strategy of photovoltaic power fluctuation based on SOC consistency of multi-battery packs is proposed in this paper. By adjusting the output power of the energy storage system,the fluctuation component of the photovoltaic output power which exceeding the short-term fluctuation rate is compensated. During the compensation period,the minimum difference of state of charge(SOC)of each energy storage battery is taken as the optimization target and the charge and discharge status switching and power distribution of battery pack is as optimization variables.Under the premise of not weakening the compensation effect,the SOC difference of each battery pack is gradually reduced and the frequent switching of charge and discharge status of the battery pack is improved.Finally,the stabilization strategy simulation platform is set up by the use of Matlab software so to perform the experiment. The result shows that the strategy proposed in this paper can be able to achieve desired goals.
作者
王陈园
傅春明
张文赋
史存伟
张栋
刘振雷
李威
WANG Chenyuan;FU Chunming;ZHANG Wenfu;SHI Cunwei;ZHANG Dong;LIU Zhenlei;LI Wei(Shandong Electrical Engineering&Equipment Group Co.,Ltd.,Jinan 250022,China;State Grid Comprehensive Energy Service Group Co.,Ltd.,Beijing 100000,China)
出处
《电力电容器与无功补偿》
2021年第6期237-244,共8页
Power Capacitor & Reactive Power Compensation
关键词
平抑波动
荷电状态
功率分配
光伏发电
power fluctuation smoothing
state of charge(SOC)
power distribution
photovoltaic power
