网省两级调度多电源短期联合调峰方法

Coordination Method of Regional and Provincial Grids for Short-term Peak Shaving Operation Among Hybrid Energy Sources

在大电网平台下,利用各个省级电网负荷互补特性、以及常规水电、抽水蓄能、火电等电源调节性能的差异,协调多个电网间的电力分配,对于缓解中国电网普遍存在的调峰压力尤为重要。以华东电网网省两级调度平台为依托,提出网省两级调度多电源联合调峰方法。该方法根据电源类型将原问题分解为抽蓄、常规水电、火电、核电等4个独立子问题,并对应提出抽蓄启发式搜索算法、水电混合降维算法、火电切负荷调峰算法进行子问题求解;在此基础上,以系统负荷为关联因子,耦合前述算法和提出的网间电力分配二次规划方法建立多个子问题的协调求解框架,实现多种电源多个电网协调运行。实际应用结果表明,所提方法能够有效协调多个省级电网峰值负荷需求,比实际调度更好地发挥了华东网调电源的调峰作用。

Coordination is essential for alleviating the common peaking pressure of most of China＇s power grids by fully using load differences among multiple provincial power grids, and regulation capability differences among conventional hydropower plants, pumped-storage plants and thermal power plants. The East China Grid （ECG）, one of China＇s regional power grids, was taken as the example~ A coordination method Was developed to solve short-term peak shaving operation problems of hybrid energy sources between regional and provincial power grids. The method decomposes the original problem into four independent subproblems according to the energy source types. A heuristic search algorithm, a successive search algorithm, and improved load shedding algorithm were proposed to respectively solve the pumped-storage subproblem, conventional hydropower subproblem, and thermal subproblem. Moreover, a solution framework incorporated these algorithms, where the quadratic programming algorithm is repeatedly used to allocate electric power among provincial grids after obtaining the generation schedule of each plant. The proposed method was applied to the dispatching center of ECG for scheduling its own plants. The results show that the method can effectively coordinate different peak load demands among provincial power grids and produces better generation schedules than the actual operation.