基于阻塞分析的输电线路动态增容

为了确保输电线路动态增容后电网的安全稳定运行，基于超短期预测数据确定输电能力的受限原因，通过计及动态安全的阻塞管理分析识别阻塞关联输电线路。针对增容的线路和增容时段，根据气象预测数据计算未来一段时间内的允许载流量。对阻塞时间在一定范围内的待增容线路，考虑导线温升暂态过程，进行事故后导线允许载流量分析。并在此基础上确定满足安全稳定约束的增容容量。基于上述方案开发了一种基于阻塞分析的输电线路动态增容系统。

Transmission line dynamic capacity-increase based on congestion analysis

To ensure the security and stability of the power grid after implementing dynamic capacity-increase for overhead transmission line, a new dynamic capacity-increase method based on congestion management analysis is proposed. The reasons for transmission capability restriction are clarified based on ultra-short-term forecasting data, and the key transmission lines are identified by congestion management analysis considering dynamic security constraints. According to the congested transmission lines and capacity-increase periods, the permissive current-carrying capacity in a future period is calculated based on weather forecasting data. The transient process of temperature rising is considered in the post-fault permissive current-carrying capacity calculation for the lines whose congestion time is within certain range. On this basis, the amount of capacity-increase is determined to meet the stability and security constraints. Based on the above scheme, a dynamic capacity-increase system for overhead transmission line is developed.