断面安全约束下发电可行域实用分析方法

针对市场环境下调度计划月度安全校核存在时间跨度大、负荷以及新能源出力预测精度差、交易电量的不确定程度高等问题，提出构建发电可行域的工程实用方法。首先，基于各发电机出力相对于关键断面的有功灵敏度，结合机组的地理位置，对全网机组进行分群；然后，提出构建发电可行域的基态潮流确定方法；在此基础上，以主导发电机群的总出力为横坐标，以系统总负荷为纵坐标，构建系统在不同负荷水平下的主导发电机群发电可行域；最后，根据系统运行方式对发电可行域进行在线修正。以某省级电网为例，验证所提方法的可行性。

A Practical Method for Analyzing Feasible Generation Region under Security Constraint of Key Transmission Line Section

Under power market circumstances, the monthly safety check of dispatch schedule faces many problems, such as long time span, poor forecast accuracy of power load and new energy power, and high uncertainty of trading energy. Therefore, a practical constructing method for feasible generation region is proposed in this paper. Firstly, the generator units in the whole grid are clustered based on the active power sensitivity of each generator unit relative to the key transmission line, and combined with the unit's geographic location. Secondly, the base power flow determination method for building feasible generation region is proposed. Furthermore, the feasible generation region of leading generator cluster under different load levels is built with the total active power output of leading cluster and the total load set as the horizontal coordinates and vertical coordinates, respectively. Finally, the feasible generation region is revised on-line according the power system’s real operation condition. A provincial power system is used to validate the feasibility of the proposed method in this paper.