含风光电场的电力系统经济调度研究

发布时间：2018-03-12 16:00

本文选题：经济调度　切入点：风光电场　出处：《广西大学》2015年硕士论文　论文类型：学位论文

【摘要】：大规模的风电场、光伏电站的建设大大提高了清洁环保能源的利用率,但两者的随机性、波动性在并网运行的同时也给电网系统带来了诸多问题。因此我们需要降低风电场和光伏电站并网后输出功率波动所造成的影响。所以对含有大规模风光电场的电力系统经济调度研究,就是在确保系统安全稳定运行的时候,综合考虑系统风光电并网所带来的多种约束条件,使系统达到所要求的最佳经济环保效益,是目前的热点研究内容。本文首先在分析风能和太阳能资源的间歇性、波动性等特点的基础上,采用机会约束规划理论,建立了含风电场、风光电场的电力系统经济调度模型。把系统的总购电成本最小作为模型求解目标,目标函数由火电机组的运营成本、环境惩罚成本、风电和光伏发电的购电成本三个部分组成。另外目标函数还包括煤耗量、污染排放量等。然后,重新考虑因风电场和太阳能光伏电站输出功率的间歇波动特性对系统旋转备用容量、爬坡能力等约束的影响,同时考虑了电力系统供需平衡关系。综合考虑各种约束条件,得到不同置信水平下的调度方案,讨论模型的环保经济效益关系。由于建立的模型含有多个随机变量,本文采用基于蒙特卡洛模拟技术的遗传算法直接求解含风光电场的电力系统经济调度模型。该方法能够较好的描述模型中的随机变量,处理目标函数和约束条件。通过实验仿真结果分析表明所建模型能够较好的兼顾各种效益,实现资源的优化配置。
[Abstract]:Large scale wind farms and photovoltaic power plants have greatly improved the utilization rate of clean and environmentally friendly energy, but both are random. Therefore, we need to reduce the influence caused by the fluctuation of output power after wind farm and photovoltaic power station connected to grid. Research on Economic Dispatch of Power system, That is, in order to ensure the safe and stable operation of the system, we should take into account the various constraints brought about by the wind and optoelectronic connection of the system, so that the system can achieve the best economic and environmental benefits required. Firstly, based on the analysis of the intermittent and fluctuating characteristics of wind and solar energy resources, a wind-farm containing wind farm is established by using the theory of opportunity-constrained programming. The economic dispatching model of electric power system with solar electric field. The minimum total power purchase cost of the system is taken as the goal of the model, and the objective function is derived from the operating cost of thermal power unit and the cost of environmental punishment. The cost of purchasing electricity for wind power and photovoltaic power generation is composed of three parts. In addition, the objective function also includes coal consumption, pollution emissions, etc. Then, This paper reconsiders the effect of intermittent fluctuation of output power of wind farm and solar photovoltaic power station on system rotation reserve capacity and slope climbing capacity, and considers the balance between supply and demand of power system. The scheduling schemes at different confidence levels are obtained, and the relationship between environmental protection and economic benefits of the model is discussed. In this paper, a genetic algorithm based on Monte Carlo simulation technique is used to solve the economic dispatching model of power system with solar electric field. This method can describe the random variables in the model. The simulation results show that the model can realize the optimal allocation of resources by taking all kinds of benefits into account.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM614;TM73

【参考文献】