含大规模新能源的电力系统短期优化运行研究

发布时间：2018-07-10 02:50

本文选题：短期优化运行 + 机会约束规划　；参考：《华中科技大学》2014年硕士论文

【摘要】：近些年，受国家政策补贴以及成本下降的双重激励，我国风电、光伏发电的装机规模迅速增长。由于风本身具有波动和间歇的特性，光伏也由于太阳辐照度受天气、气候等条件的影响具有明显的波动特性，使得风电和光伏发电不能够按照传统的方法进行调度。随着大规模风电、光伏接入电网，其不可控的出力特性使得电网调度运行更加复杂多变，并伴随产生强迫切负荷、弃风弃光等一系列影响，不仅影响了电力系统的经济可靠运行，也影响了可再生能源的消纳规模。所以大规模新能源发电并网给电力系统的经济调度问题提出了更高的要求。本文在对现有文献和研究成果进行回顾整理的基础上，首先对风电以及光伏的出力特性以及短期出力建模方法进行了分析。针对风电和光伏发电的随机性、预测精度低的特点，，提出一种基于机会约束规划的电力系统短期经济调度模型。并针对风电、光伏发电在出力特性方面的不同，分别从大规模风电接入电力系统和大规模光伏接入电力系统两方面提出了相应的经济调度模型。基于风电和光伏发电逐时的概率分布函数，引入基于置信度的风险备用，采用概率的形式考虑系统的备用约束，以适应风电和光伏发电的随机性。在目标函数中，采用相应的惩罚成本对风电、光伏出力波动引发的强迫切负荷与弃风、弃光损失加以考虑，且综合考虑了系统的可靠性、经济性以及新能源利用。应用本文模型对IEEE RTS-96系统进行了多方案的仿真分析。算例分析的结果表明，本文所提出的基于机会约束规划的电力系统短期经济调度模型能够较好地解决可靠性和经济性的矛盾，更好的适应市场环境下电网公司追求自身良好的经济效益的要求。结果证明了本文方法的有效性。
[Abstract]:In recent years, the scale of wind power generation and photovoltaic power generation in China has increased rapidly. Because of the fluctuating and intermittent characteristics of wind and the obvious fluctuation of photovoltaic due to the influence of weather, climate and other conditions on solar irradiance, wind power and photovoltaic power generation can not be scheduled according to the traditional methods. With the large-scale wind power, photovoltaic connected to the grid, its uncontrollable output characteristics make the power grid dispatching more complex and changeable, and accompanied by a series of effects, such as forced load cutting, abandonment of wind and light, and so on. It not only affects the economic and reliable operation of power system, but also affects the scale of renewable energy consumption. Therefore, large scale new energy generation and grid connection put forward higher requirements for the economic dispatch of power system. Based on the review of the existing literatures and research results, this paper first analyzes the characteristics of wind power generation and photovoltaic power generation, as well as the modeling method of short-term output force. In view of the randomness of wind power and photovoltaic power generation and the low prediction accuracy, a short-term economic dispatching model of power system based on opportunity-constrained programming is proposed. According to the difference of wind power and photovoltaic power generation, the corresponding economic dispatching models are put forward from two aspects of large-scale wind power access power system and large-scale photovoltaic power system. Based on the hourly probability distribution function of wind power and photovoltaic power generation, the risk reserve based on confidence is introduced, and the standby constraints of the system are considered in the form of probability in order to adapt to the randomness of wind power and photovoltaic power generation. In the objective function, the corresponding penalty cost is used to consider the forced shedding and abandonment of wind load and light loss caused by wind power and photovoltaic force fluctuation, and the reliability, economy and new energy utilization of the system are considered synthetically. The simulation of IEEE RTS-96 system is carried out by using this model. The results of an example show that the proposed short-term economic dispatch model based on chance constrained programming can solve the contradiction between reliability and economy. Better adapt to the market environment grid companies to pursue their own good economic requirements. The results show that the proposed method is effective.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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