城市轨道交通主变电所负荷过程实测分析

Measurement and analysis of load process in main substation of urban rail transit

主变电所在城市轨道交通供电系统中占据着举足轻重的地位,为了掌握其负荷特征,评估其供电能力及可靠性,指导主变压器容量设计,本文以已运营线路主变电所的负荷过程测试数据进行统计。统计显示高峰小时主变电所主变压器的负荷率大多在37%~53%之间,负载率在11%~48%之间;同时通过模拟主变电所仅有一段进线供电的负荷情况,表明单段供电时主变压器负荷率在41%~48%之间,负载率在50%~95%之间,主变电所两台变压器的同时系数约等于1。测试结果表明,被测试主变电所供电可靠性较高,且部分主变电所因为运营时期较短,其仍有较大裕量供电能力。

The high voltage substation of urban rail transit occupies a decisive position in city rail power supply system,in order to grasp its load characteristics,evaluate its power supply capability and reliability,and guide the design of the high voltage transformer capacity,this paper carries out statistics on load test data of the high voltage substation of existing operation line.The statistics show that the high voltage transformer's load factor of the main transformer in peak hours is mostly between 37%~53%and the load rate is between 11%~48%.At the same time,supposing the main transformer substation only uses one incoming line of power supply system,the load factor of the high voltage substation is between 41%~48%,the load rate of the high voltage substation is between 50%~95%,and the simultaneous coefficient of the two transformers in the high voltage substation is about 1.The test results show that the power supply reliability of the high voltage substation tested is high,and the power supply capacity of the high voltage substation is still relatively large due to the short operation time of the high voltage substation.