偏远地区交直流供电经济性比较

Economic Comparison of AC and DC Power Supply in Remote Areas

提出一种适合偏远地区输电的配电侧使用直流变压器的直流供电拓扑结构,并与传统交流供电拓扑进行比较。基于线路压降等技术指标进行计算与线路选型,根据造价估算及线路损耗折现进行经济性比较。研究计算表明,多数情况下偏远地区采用直流供电方案经济性更好;直流供电线路损耗更低,最大传输功率和输电距离更大;在工程改建扩容方面更具优势。

A DC power supply topology with DC transformers in distribution side is proposed for power supply in remote areas. Compare between the proposed DC power supply topology and the traditional AC power supply topology has been made. Based on technical indicators such as line voltage drop, calculation and type selection of line have been done. Economic comparison has been made between AC and DC power supply scheme according to cost estimation and discount calculation of line loss. Results show that in most condition, DC supply is more economic effective, with lower line loss, larger transmission power, larger transmission distance, and more advantages in reconstruction and expansion of engineering.