考虑风光荷联合作用下的电力系统经济调度建模

发布时间：2018-11-19 13:54

【摘要】：为了解决风光荷等多种随机因素对系统调度带来的问题,需进行含风力发电、光伏发电的电力系统经济调度研究。通过引入风电与光电功率以及负荷预测偏差的概率分布,并考虑各种随机因素之间的关联性,构建了风光荷的联合概率密度函数。建立了典型运行方式下失负荷风险模型和经济调度模型,该模型采用失负荷损失量约束取代一般调度模型的失负荷概率约束。利用改进的超分位数方法,采用蒙特卡罗模拟和解析法相结合进行仿真计算。算例仿真结果表明:基于实际系统运行方式及随机因素关联性,根据典型运行方式经济调度模型,不仅能得到不同置信水平、随机因素不同关联程度的系统最优调度结果,还可在满足系统可靠性的前提下实现经济性最优。
[Abstract]:In order to solve the problem caused by many random factors such as wind load and other stochastic factors, it is necessary to study the economic dispatch of power system including wind power generation and photovoltaic power generation. By introducing the probability distribution of wind power, photoelectric power and load forecasting deviation, and considering the correlation between various random factors, the joint probability density function of wind load is constructed. The model of loss of load risk and the model of economic dispatch under typical operation mode are established. In this model, the loss of load quantity constraint is used to replace the load loss probability constraint of general dispatching model. The improved over quantile method is used to simulate and calculate with Monte Carlo simulation and analytical method. The simulation results show that according to the economic scheduling model of typical operation mode, the optimal scheduling results of different confidence levels and different correlation degree of random factors can be obtained based on the actual system operation mode and stochastic factor correlation. The economic optimization can also be realized under the premise of satisfying the reliability of the system.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);智能电网运行与控制湖南省重点实验室(长沙理工大学);
【基金】：国家自然科学基金项目(51377068) 国家电网公司2013年科技项目“微电网与配电网的互动模式与协调优化技术研究”~~
【分类号】：TM73

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