The invention relates to a subway medium-voltage power supply system based on DC +/-10kV, which comprises a plurality of rectifier units, the input end of each rectifier unit is connected with an urban public alternating current power grid through an alternating current cable provided with a three-phase alternating current circuit breaker, and the positive electrode and the negative electrode of the output end of each rectifier unit are respectively connected with a DC +/-10kV direct current bus through a direct current cable provided with a direct current circuit breaker; the rectifier unit is internally provided with a converter module, the subway substation is internally provided with a DC-DC converter, the input end of the DC-DC converter is connected with a DC +/-10kV DC bus, and the two output ends of the DC-DC converter are respectively connected with a DC 1500V voltage level contact network cable and a DC 750V voltage level load cable; a direct current (DC) 1500V voltage level contact network cable and a DC +/-10kV DC bus form a loop connection mode through a DC-DC converter; the construction cost can be greatly reduced, the architecture of the subway power supply system is optimized, and the reliability and the power supply quality are greatly improved.
本发明涉及一种基于DC±10kV的地铁中压供电系统,包括多个整流机组,整流机组的输入端通过设置有三相交流断路器的交流电缆与城市公共交流电网相连接,输出端的正极和负极分别通过设置有直流断路器的直流电缆与DC±10kV直流母线相连接;整流机组内设置变换器模块,地铁变电所内部设置DC‑DC变换器,DC‑DC变换器的输入端与DC±10kV直流母线相连接,其两个输出端分别与DC1500V电压等级的接触网电缆和DC750V电压等级的负荷电缆相连接;DC1500V电压等级的接触网电缆通过DC‑DC变换器与DC±10kV直流母线形成环路连接方式;本发明能够大大减少建设成本,同时优化地铁供电系统架构,大为提高可靠性和供电质量。
Metro medium-voltage power supply system based on DC +/-10kV
一种基于DC±10kV的地铁中压供电系统
2023-10-24
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / 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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