基于交换卷积的含高比例新能源电力系统运行评估方法

Operation Evaluation Method of High Proportion Renewable Energy Power System Based on Exchange Convolution

随着新能源的大规模建设,评估确定含高比例新能源电力系统的运行方式成为亟待解决的问题针对目前的评估方法没有充分考虑机组调峰潜能的问题,提出了交换卷积的方法。该方法以目前广泛采用的基于等效电量函数法和等效电量频率法的随机生产模拟为基础,首先建立持续负荷曲线和等效负荷频率曲线进行预随机生产模拟;然后根据预随机生产模拟结果确定髙频率启动机组;最后以交换卷积方法进行交换卷积。采用某省实际电网算例对所提方法进行计算,验证了所提方法的有效性。与传统方法相比,所提方法可以更加充分发挥系统的调峰潜能,增进评估的有效性。

With the large-scale constmction of renewable energy, it is urgent to assess the power system energy and determine its operation mode. It is of great significance to study the operation evaluation of power system with high proportion of new energy. In view of the present evaluation methods that have not fully considered the peak shaving potential of generator units, the method of exchange convolution is proposed. On the basis of the probability production simulation that is based on presently widely used equivalent electricity function method and equivalent electricity frequency method, the load duration curve and equivalent load frequency curve are firstly established, and the pre-probability production simulation is carried out;and then, the high-frequency starting units are determined according to the pre- probability production simulation results;finally the convolution is exchanged based on the exchange convolution method. A case study is made on a practical power system, which verifies the effectiveness of the proposed method. Compared with the traditional method, the method proposed in this paper can give full play to the peak potential of the system and improve the effectiveness of the evaluation.