The invention discloses a protection scheme and system for a segmented power supply full parallel AT traction network, and belongs to the technical field of railway traction network relay protection. The method specifically comprises the following steps: after the full-parallel AT traction network is divided into a plurality of sections, firstly, monitoring the head end current of each section in real time, calculating the effective value of the current, and judging whether a fault occurs or a locomotive passes according to the magnitude of the current; secondly, constructing a current criterion, and judging a fault or a section through which a locomotive passes; and finally, calculating the variable quantity of the current at the head end of the section, judging whether the locomotive passes by or fails according to the variable quantity of the current at the head end, and if the fault is judged, disconnecting circuit breakers at the two sides of the failed section, isolating the fault and protecting the full parallel AT power supply traction network. According to the method, the fault section of the segmented power supply full parallel AT traction network can be rapidly cut off, normal power supply of the traction network in the non-fault section is ensured, the power failure range is narrowed, and the power supply reliability of the full parallel AT traction network is improved.
本发明公开了一种分段供电全并联AT牵引网的保护方案及系统,属于铁路牵引网继电保护技术领域。具体包括:全并联AT牵引网分为若干区段后,首先,实时监测各区段首端电流并计算电流有效值,根据电流大小判断是否出现故障或者机车经过;其次,构造电流判据,判断故障或机车经过的区段;最后,计算区段首端电流的变化量,根据首端电流变化量的大小判断出是机车经过还是故障,若判断为故障,则断开故障区段两侧的断路器,隔离故障,保护全并联AT供电牵引网。本发明能够快速切除分段供电全并联AT牵引网的故障区段,保证非故障区段牵引网正常供电,缩小了停电范围,提高了全并联AT牵引网的供电可靠性。
Protection scheme and system for segmented power supply full parallel AT traction network
一种分段供电全并联AT牵引网的保护方案及系统
28.03.2025
Patent
Elektronische Ressource
Chinesisch
IPC: | B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES |
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