The invention discloses a series electrified railway in-phase power supply system which is composed of a traction transformer T1 and a voltage compensation converter Vp, three terminals of the input side of the traction transformer T1 are connected to a three-phase power supply end line, four terminals of a secondary winding are a, b, c and d to form two single-phase voltages Uab and Ucd, and a direct supply loop is a terminal a and a terminal b; the voltage compensation converter Vp is composed of an AC-DC-AC converter and an isolation transformer T2, the input end of the voltage compensation converter Vp is connected with the c end and the d end of the traction transformer, after the output side of the voltage compensation converter Vp passes through the isolation transformer T2, the e end of the voltage compensation converter Vp is connected with the b end of the voltage output side of the traction transformer, and the f end of the voltage compensation converter Vp is connected with a steel rail. The voltage and phase of the series in-phase power supply provided by the invention are adjustable, voltage fluctuation can be suppressed, and the tail end network voltage can be improved; negative-sequence current is reduced, reactive compensation and harmonic treatment are realized, and electric energy quality is improved; the active part is small in capacity, so that more investment cost is saved.
本发明公开了一种串联型电气化铁路同相供电系统,由牵引变压器T1和电压补偿变流器Vp构成,牵引变压器T1的输入侧三个端子连接到三相电源端线,次边绕组的四个端子为a、b,c、d构成两个单相电压Uab和Ucd,直供回路为端子a和端子b;电压补偿变流器Vp由AC‑DC‑AC变流器和隔离变压器T2两部分构成,电压补偿变流器Vp输入端接牵引变压器的c和d端,输出侧经过隔离变压器T2后,e端与牵引变压出侧的b端相连,f端与接钢轨地相连。本发明提供的串联型同相供电的电压和相位可调,能抑制电压波动,提升末端网压;降低负序电流、实现无功补偿和谐波治理,提升电能质量;有源部分的容量小,更节约投资成本。
Tandem type electrified railway in-phase power supply system
一种串联型电气化铁路同相供电系统
2023-09-01
Patent
Electronic Resource
Chinese
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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