电网安全和调度公平性的新能源发电计划研究

Research on New Energy Generation Scheduling for Grid Security and Scheduling Fairness

[目的]随着风电场、光伏电站不断并网,地区电网网架结构发展跟不上新能源机组容量的增长速度,多能源混合的特点以及断面分层的特征给日前发电计划制定带来困难,为此提出一种考虑断面安全约束和调度公平性的多层次多能源日前发电计划方法。[方法]一是深度优先搜索越限断面,二是提出基于信息熵的出力受限分配策略,利用经济学领域中信息熵的概念指导评价调度公平性的量化指标,构造一种公平性计算方法。[结果]在保证断面潮流接近稳定极限的情况下,合理公平进行各个电厂的有功功率分配,实现电网安全稳定运行条件下的风光资源充分利用。[结论]通过某地区电网实际算例进行验证,该方法可以解决目前新能源发电计划制定存在的问题,具有很好的实际应用价值。

[Introduction]With incessant grid-connection of wind farms and photovoltaic power stations,the development of regional power grid structure cannot keep pace with the growth rate of new energy unit capacity,characteristics of multi-energy mix and hierarchical features of section bring difficulties to the formulation of day-ahead generation scheduling,for this reason,a method for multi-level and multi-energy day-ahead generation scheduling considering the safety constraint of the section and the fairness of dispatch was proposed.[Method]This paper presented a depth-first search for the restricted section,and proposed an output limitation allocation strategy based on information entropy.A fairness calculation method was constructed by using the concept of information entropy in economics to guide the quantitative indicators for evaluating scheduling fairness.[Result]Under the circumstances of ensuring that the cross-sectional current is close to the stability limit,the active power of each power plant is distributed reasonably and equitably,thereby realizes the full utilization of wind and solar resources.[Conclusion]Through a practical example of a regional power grid,it is proved that this method can solve the existing problems in new energy day-ahead generation scheduling and has good practical application value.