提高广东架空送电线路输送容量研究

阐述架空导线载流控制条件，分析广东架空送电线路实际运行条件和广东地区多年实测气象参数，制定广东架空线路正常运行允许电流I0，通过风险分析证实现有线路正常载流能力可安全地提高7％以上。在正常允许电流I0的基础上，挖掘运行线路跨越距离裕度，提出架空线路在检修、应急两种特殊运行条件下的允许电流I1、I2及其确定原则，通过对实际线路开展测量和验算，确认电网特殊情况下存在安全增容的可能性，特定线路可以多输送容量30％～50％。

Study on Raising Transmission Capacity of Overhead Transmission Line in Guangdong Power Grid

The control condition of carrying capability of overhead transmission line is introduced, and a deep analysis is given on operation terms of transmission lines and weather parameters survey in decades in Guangdong, and allowable current I0 on transmission line under normal operation for Guangdong Power Grid is established. It is approved by risk analysis that the transmission capacity can be raised 7% safely. Based on the normal allowable current Io, the paper studies the residual span distance of overhead transmission line, puts forward two allowable current I1, I2 under overhauling and emergency conditions respectively, and their setup principle. The possibility of raising line transmission capacity 30%-50% is confirmed by surveying and checking computation of several operating lines.