大型光伏电站能量管理系统研究

发布时间：2018-05-25 17:28

本文选题：大型光伏电站 + 能量管理　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：能源是经济发展的动力之源,中国一直以来就是能源消耗大国,为了减缓化石能源的消耗,太阳能、风能等新能源的开发得到了越来越多的重视。光伏发电作为一种高效清洁的可再生能源发电技术,成为近年来发展速度最快的新型发电产业之一。随着光伏发电技术的不断提高和建设成本的逐渐降低,各地出现诸多大型光伏电站。光伏发电的输出功率受环境因素影响具有间歇性、波动性和随机性等特点,这使得光伏电站的控制稳定性和快速调节能力差,大规模光伏发电接入电网会造成电网功率不平衡和并网点电压波动等危害。光伏电站的功率控制技术即能量管理系统对于大型光伏电站起着非常重要的作用,是目前提高大型光伏电站的并网电能质量,增强大型光伏电站并网可靠性,实现并网友好型电站,促进光伏发电真正成为未来城市电网优质电源亟待解决的问题。本文首先在分析光伏电池基本工作原理的基础上利用MATLAB/Simulink平台搭建光伏组件仿真模型,得到光伏组件的输出特性曲线,并采用扰动观察法通过控制Boost电路的占空比实现光伏阵列的最大功率追踪。然后根据三相并网逆变器的电路结构推导出其数学模型,按电网电压定向的矢量控制方法设计并网逆变器的有功功率和无功功率的解耦控制并进行仿真验证。最后以大型光伏电站为研究背景,详细分析大型光伏电站的实际模型,对光伏并网逆变器的无功输出能力以及并网点电压影响因素进行研究,分析光伏电站内部电压分布不平衡的原因,提出一种并网逆变器与光伏电站其他无功补偿装置协调控制策略,通过求解多目标优化模型得到大型光伏电站的无功分配优化控制方案
[Abstract]:Energy is the driving force of economic development. China has always been a big energy consuming country. In order to slow down the consumption of fossil energy, the development of new energy, such as solar energy, wind energy and so on, has been paid more and more attention. Photovoltaic power generation, as an efficient and clean renewable energy generation technology, has become one of the fastest growing new generation industries in recent years. With the continuous improvement of photovoltaic power generation technology and the gradual reduction of construction costs, there are many large photovoltaic power stations. The output power of photovoltaic power generation is affected by environmental factors, which has the characteristics of intermittent, volatility and randomness, which makes the control stability and fast regulation ability of photovoltaic power station poor. Large-scale photovoltaic power generation will cause power imbalance and voltage fluctuation. The power control technology of photovoltaic power station, that is, energy management system, plays a very important role in large-scale photovoltaic power station, which is to improve the grid-connected power quality of large-scale photovoltaic power station and enhance the reliability of grid-connected photovoltaic power station. The realization of grid-friendly power station and the promotion of photovoltaic power generation really become the problem of high quality power supply in future urban power grid. Firstly, based on the analysis of the basic working principle of photovoltaic cell, the simulation model of photovoltaic module is built by using MATLAB/Simulink platform, and the output characteristic curve of photovoltaic module is obtained. The maximum power tracking of photovoltaic array is realized by controlling the duty cycle of Boost circuit by perturbation observation method. Then, according to the circuit structure of three-phase grid-connected inverter, the mathematical model is deduced, and the decoupling control of active and reactive power of grid-connected inverter is designed and verified by simulation. Finally, taking the large-scale photovoltaic power station as the research background, the actual model of the large-scale photovoltaic power station is analyzed in detail, and the reactive power output ability of the photovoltaic grid-connected inverter and the influence factors of the parallel dot voltage are studied. Based on the analysis of the unbalanced voltage distribution in photovoltaic power plants, a coordinated control strategy between grid-connected inverters and other reactive power compensators in photovoltaic power plants is proposed. Optimal reactive power distribution control scheme for large photovoltaic power plants by solving multi-objective optimization model
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM615

【参考文献】