一种考虑设备可载性的输电线路动态应急增容方法

摘要

充分利用输电线路动态应急增容能力,对于避免设备因过载而损坏,保证系统可靠性和为调度调整预留时间意义重大.在现有研究工作的基础上,提出了一种考虑设备可载性的输电线路动态增容方法,在应急场景下,采用通道阻塞分析选取增容线路,并分析增容线路在线温、故障概率、失效贡献、个体损失等约束下设备可载性,并结合微气象信息针对不同应用场景进行应急增容方案的差异化分析.算例分析定量展现了可载性约束下线路应急增容策略的计算分析过程及设备可载性对应急增容策略的影响.该方法能充分响应设备状态、气象环境、系统工况对设备可载性的影响,并基于设备可载性实现线路的差异化应急增容,进而指导调度人员进行增容、限容操作.%It is of great significance to fully utilize dynamic emergency capacity-increase capability of transmission lines, which can help avoiding equipment damage due to overload, ensuring power system reliability and reserving time for dispatch adjustment.On the basis of current research, this paper proposes a dynamic capacity-increase method for transmission lines with considering the load capacity of equipment.In an emergency scene, lines are picked by congestion analysis and their load capacities under the constraints of line temperature, failure probability, failure contribution and individual loss are analyzed.In combination with micro-meteorological information we could acquire tailored emergency capacity-increase plans under different application scenes.The case study quantitatively shows the calculation procedure of emergency capacity-increase plan under the constraint of load capacity, as well as the effect of load capacity on capacity-increase strategy.This method can fully consider the effects on load capacity from equipment status, meteorological environment and operating condition, provide tailored capacity-increase strategy according to the load capacity of equipment and instruct dispatchers to increase or limit capacity.