电工技术学报2024，Vol.39Issue(9)：2784-2796,13.DOI:10.19595/j.cnki.1000-6753.tces.230196
基于可行域投影理论的新能源电力系统协同运行方法
Coordinated Operation Method of Renewable Energy Power Systems Based on Feasible Region Projection Theory
摘要
Abstract
Vigorously developing the new-type power system dominated by renewable energy to build a clean,low-carbon,safe and efficient energy system is the path for China to achieve the"3060 carbon dioxide emission and carbon neutrality target".With the gradual increase of the penetration of renewable energy,the deep defects of the traditional energy system have gradually emerged.The imperfect energy coordination system,such as difficulty in optimal allocation of resources across provinces and low utilization of distributed energy,has become a bottleneck restricting the construction of new-type power systems.Therefore,the development of the new power system urgently needs to break the barriers of the traditional operation system,realize the efficient cooperation across regions and levels,and optimize the allocation of resources in a larger scope. Firstly,a new cooperative operation mode of power system based on feasible region projection theory is proposed.Each subsystem in the power system forms a high-dimensional feasible space by aggregating the internal operation constraints and projecting to the common connection points to form its equivalent feasible region.The superior system implements the power balance dispatching of the whole network according to the feasible region of the subsystem to realize the efficient cooperation among all levels of the dispatching system. Subsequently,the definition of feasible region and its mathematical expression of polyhedron are proposed.It is necessary to find all vertices of the dual space to describe the feasible region.However,the redundancy constraint in power system leads to numerous variables in the dual problem.Even all vertices in the high-dimensional space of regional power grid with simple structure are difficult to be retrieved by traversal.Therefore,combined with umbrella constraint identification method,a feasible region characterization method based on external approximation method is proposed in this paper.The redundant constraints of the original problem are eliminated by umbrella constraint identification,and the feasible region is quickly segmented by external approximation algorithm. Three application scenarios are proposed:(1)Feasible regions aggregation of distribution network/virtual power plants.(2)Inter-provincial multiline available transmission capacity calculation.(3)Multi-period transmission and distribution network coordinated operation.Case studies show that the algorithm and model proposed in this paper can effectively reduce the scale of the regional power grid,thereby reducing the information interaction between the regional power grid and the system operator,and improving the operation optimization efficiency of the renewable energy power system.关键词
新能源电力系统/可行域/投影等值/协同调度Key words
Renewable energy power system/feasible region/equivalent projection/coordination scheduling分类
信息技术与安全科学引用本文复制引用
张天策,李庚银,王剑晓,魏韡,周明..基于可行域投影理论的新能源电力系统协同运行方法[J].电工技术学报,2024,39(9):2784-2796,13.基金项目
国家自然科学基金资助项目(52277092). （52277092）
