牵引变压器容量的合理选择

目前我国对电力设备容量大于315kVA的用户均采用两部制电价计费,电价由基本电价和电量电价2部分组成。铁路牵引负荷特点在于负荷波动性大,经常出现负荷陡变,而正常运行时牵引变压器大多处于欠负载状态,只有在短时紧密运行时会出现过负载现象。根据电气化铁道负荷特点和牵引变压器的过负载特性,通过对牵引变压器容量合理性的探讨,考虑在保证安全供电的前提下减小牵引变电所主变压器安装容量是降低铁路运输成本的可行办法之一。

Rational selection of traction transformer capacity

The two-part power price composed by basic price and energy price has been used to measure user electrical supply equipment with installed capacity over 315 kVA. Since the great fluctuation and abrupt changes of load of the electrified railways, the traction transformers remain under-loaded in most cases in normal operation and remain over-loaded in a short period during the intensive operation of trains. By consideration of rational capacitance of the traction transformers, and in accordance with load characteristics of the electrified railways and over-load characteristics of the traction transformers, with safety power supply as a premise, to reduce the installed capacitance of the main transformers in traction substation is an accessible way in reducing the cost of railway transportation.