考虑条件断面限额自动匹配的一体化发电计划优化

断面限额是电网安全可靠运行的重要边界条件。随着电网规模的扩大，互联电网运行方式复杂多变，很多断面限额仅在一定的机组开机方式或者相关支路潮流水平等条件下适用，甚至这些条件断面之间也会存在相互关联。传统基于人工经验的起效条件判定需反复尝试断面限额进行发电计划优化，使得发电计划优化决策过程非常复杂。文中在传统考虑固定断面限额的发电计划优化模型的基础上，针对条件断面限额依据相关变量所属区间进行判定的特点，提出一种发电计划和条件断面限额一体化优化建模技术。该模型可实现条件断面限额与发电计划自动匹配，在保障电网安全的同时进一步挖掘电网输送潜力。最后，基于所提模型对断面潮流区间、开停机台数等典型的条件断面限额场景进行算例分析，验证了该模型的有效性。

Integrated Power Generation Plan Optimization Considering Automatic Matching of Conditional Transmission Section Limits

Transmission section limit (TSL) is an important boundary condition for the safe and reliable operation of power grid. As the scale of the power grid expands, the operation mode of the interconnected power grids is more and more complicated and variable, and many TSLs are only applicable under such conditions as certain unit start-up mode or related branch power flow level, and even these conditional transmission sections are interrelated. The traditional determination of the onset condition based on human experience requires repeated attempts of TSLs to optimize the power generation plan, which makes the optimization and decision-making process of power generation plan very complicated. Based on the traditional optimization model of power generation plan that considers fixed TSLs, and aiming at the characteristics of the conditional transmission section limits (C-TSLs) determined by the intervals which the relevant variables belong to, this paper proposes an optimization modeling technique by integrating power generation plans and C-TSLs. This model can achieve the automatic matching of C-TSL and power generation plan, and further tap the transmission potential of the power grid while ensuring the safety of the power grid. Finally, based on the proposed model, an example analysis is made on typical C-TSL scenarios such as cross section power flow ranges and the number of running and shut down units to verify the effectiveness of the model.