考虑实时气候对于输电线路载流量的影响

Influence of Real-time Climatic Conditions on Ampacity of Power Transmission Line

由于不同国家采用不同的计算标准以及不同的气候条件对输电线路载流量的计算,其结果往往不尽相同。国内与国外多基于GB50545—2010标准与IEEE Std 738TM—2012标准分别对输电导线的载流量进行计算,为此,对2个标准中的载流量计算模型进行对比分析。基于这2种计算模型,利用某500kV送出线的实时气候数据,对该线路在冬、夏2个时刻以及在特定气候条件下的载流量进行计算并对比分析,研究不同气候因素对输电线路载流量的影响程度。结果表明:采用实时的气候条件更能精确地计算出线路的载流量,在保证输电导线安全运行的情况下充分发挥其载流能力,其中,风速对输电线路的载流量影响程度最大,日照强度对输电线路的载流量影响程度最小。

Due to different calculation standards in different countries and influence on ampacity of the transmission line by different climatic conditions, the calculation results are often different. GB 50545-2012 standard and IEEE Std 738 ？- 2012 standard is respectively used for calculating ampacity of the transmission line in domestic and at abroad, therefore, this paper compares and analyzes calculation models for ampacity in these two standards. On these two models, it uses real-time climate data about one 500 kV line to calculate and analyze carrying ampacity in winter and summer as well as in specific cli-matic conditions. It also studies influence of different climatic factors on ampacity of the transmission line. Results indicate real-time climatic conditions are more available in accurately working out ampacity of the line and making full use of carrying capacity of the conductor on the premise of ensuring its safe operation. In addition, wind speed has largest influence on am-pacity of the transmission line while sunlight intensity has smallest influence.