基于变量降维的大电网经济调度优化方法

发布时间：2018-01-19 22:42

本文关键词： 经济调度发电计划大电网降维 Benders分解　出处：《电力系统自动化》2017年18期 　论文类型：期刊论文

【摘要】：随着电网规模扩大,经济调度问题因变量增多,维度巨大,造成求解困难。文中利用Benders分解法,将大电网安全约束经济调度问题分解为无安全约束的优化主问题和网络潮流安全约束子问题,将子问题安全约束返回主问题进行模型重构,通过主子问题协调最终实现问题求解。优化问题求解过程中,根据当前运行信息,对机组调整价值进行甄别,将其中对安全和经济贡献小的机组进行集中处理,同时根据重要断面潮流负荷变化的物理特征对研究时段进行检验,将非重点关注的相邻时段进行简化合并,实现压缩机组变量和时段数量、降低求解维度的目的。最后,算例验证表明基于变量降维的优化方法可以减少大电网优化时间,同时保持较高的求解精度,满足工程化计算要求。
[Abstract]:With the expansion of power network scale, the dependent variables of economic dispatch problem increase and the dimension is huge, which makes the solution difficult. In this paper, Benders decomposition method is used. The security constraint economic dispatch problem of large power network is decomposed into the optimization main problem without security constraints and the network power flow security constraint sub-problem, and the security constraints of the sub-problem are returned to the main problem for model reconstruction. In the process of solving the optimization problem, according to the current operation information, the adjustment value of the unit is screened, and the units with small contribution to safety and economy are centralized processed. At the same time, according to the physical characteristics of the load change of the important section, the study period is tested, and the adjacent periods of non-key concern are simplified and combined to realize the compressor unit variables and the number of time periods. Finally, the example shows that the optimization method based on variable dimension reduction can reduce the optimization time of large power grid, while maintaining high accuracy to meet the requirements of engineering calculation.
【作者单位】：中国电力科学研究院;国家电网华中电力调控分中心;国家电力调度控制中心;国网四川电力调度控制中心;
【基金】：国家电网公司科技项目“大电网调度计划并行协同策略及关键技术研究”~~
【分类号】：TM73
【正文快照】： 上网日期:2017-05-09。0引言随着电网互联互通建设,特大电网的安全经济运行对调度控制业务提出了新的要求[1],数量庞大的变量及其约束条件给经济调度问题的求解带来挑战,大电网安全约束经济调度(security constrainedeconomic dispatch,SCED)成为一个大规模多目标复杂约束的数

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