摘要
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。
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.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2016年第6期15-22,共8页
Power System Protection and Control
基金
国家电网公司资助项目“输电线路在线动态增容技术研究与应用”及“计及电网安全稳定性的输变电设备风险评估与运维管理决策技术研究与应用”
关键词
输电线路
动态增容
动态安全
阻塞管理
数值天气预报
transmission line
dynamic capacity-increase
dynamic security
congestion management
numerical weather forecasting
