The invention discloses an electrified railway power supply system, and belongs to the technical field of power supply and power control. The system comprises a three-phase power supply module, an AC-AC frequency conversion module, a frequency multiplication module and a single-phase traction load which are connected in sequence. Wherein the three-phase power supply module is used for providing three-phase power frequency alternating current. The AC-AC frequency conversion module is used for converting the three-phase power frequency alternating current into three-phase low-frequency alternating current and outputting the three-phase low-frequency alternating current. The frequency of the three-phase low-frequency alternating current is one third of the frequency of the three-phase power-frequency alternating current. And the frequency doubling module is used for performing frequency conversion processing on the three-phase low-frequency alternating current and outputting single-phase power-frequency alternating current to a single-phase traction load. And the frequency of the single-phase power frequency alternating current is the same as that of the three-phase power frequency alternating current. The problem that a large number of negative-sequence and zero-sequence components are generated in power grid voltage due to the fact that a three-phase power system is not matched with a single-phase traction load is solved.
本申请公开了一种电气化铁路供电系统,属于供电及电力控制技术领域。本申请系统包括依次连接的三相供电模块、交交变频模块、倍频模块和单相牵引负荷。其中,三相供电模块用于提供三相工频交流电。交交变频模块用于将三相工频交流电转换为三相低频交流电,并输出三相低频交流电。三相低频交流电的频率为三相工频交流电的频率的三分之一。倍频模块用于对三相低频交流电进行变频处理,输出单相工频交流电至单相牵引负荷。单相工频交流电的频率与三相工频交流电的频率相同。解决了三相电力系统与单相牵引负荷不匹配,导致电网电压中产生大量负序和零序分量的问题。
Electrified railway power supply system
电气化铁路供电系统
2024-07-16
Patent
Electronic Resource
Chinese
IPC: | B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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