考虑线路操作时限和恢复概率的机组启动路径优化

Optimization of unit restoration sequence considering line start-up time and restoration probability

研究了考虑线路投运时限、投运失败和机组投运时限的发电机启动路径优化问题。首先考虑线路远程操作和投运成功概率,建立了线路投运时限模型,求取了线路投运的时间期望作为线路的权值。然后研究了机组的启动时限、出力特点和进相运行能力,提出了机组在黑启动过程中的限制因素。接着以迪克拉斯算法计算最短路径,定义了机组综合优先级指标。算法实时考虑线路投运状况以贪心思想为指导提出了以迅速投运发电机组为目标的机组投运优化算法求取最优启动路径。最后应用IEEE39节点算例对所提出方法进行了分析验证。所得的研究成果对电力系统黑启动预案的制定和在线决策系统的开发具备参考价值和积极意义。

Optimization of unit start-up sequence is studied considering line start-up time, switch line failure and unit start-up time. Firstly, line start-up time model is built based on line remote operation and probability of success operation, and line start-up time expectation is calculated as line weights. Secondly, unit start-up time, output characteristic and phase operation capability are studied to propose unit limit factor in the restoration. Then, Dijkstra algorithm is used to calculate the shortest path, unit comprehensive priority index is defined. Aiming at units rapidly start up, the units restoration optimization algorithm is put forward guiding by greedy thought to calculate the best restoration sequence, considering real-time line operation condition. At last, the proposed method is validated on the IEEE 39-bus power system. The achievements obtained in this paper have reference value and active meaning to the preplan formulation of black start and its online decision-making system development.