The invention discloses a traction power supply system for converting two-phase symmetrical alternating current into single-phase alternating current. The traction power supply system comprises a Scott transformer and an alternating current phase conversion motor for converting the two-phase symmetrical alternating current into the single-phase alternating current, the output end of the Scott transformer is electrically connected to the input end of the alternating-current phase-change motor for converting the two-phase symmetrical alternating current into the single-phase alternating current,and is used for converting 330kV, 220kV or 110kV three-phase alternating current from a public power grid into 13.75 kV two-phase symmetrical alternating current; the alternating-current phase-changemotor for converting the two-phase symmetrical alternating current into the single-phase alternating current is used for converting the 13.75 kV two-phase symmetrical alternating current into the 27.5 kV single-phase alternating current and outputting the 27.5 kV single-phase alternating current to an overhead contact system. Three-phase electricity is converted into two-phase alternating currentthrough the Scott transformer, then the two-phase alternating current is converted into single-phase alternating current through the phase-changing motor, the problem of three-phase imbalance is solved, the problems of phase splitting, harmonic waves and reactive power are considered, the structure is simple, the reliability is high, and the manufacturing cost is low.

    本发明公开了一种两相对称交流电变单相交流电的牵引供电系统,包括斯科特变压器以及两相对称交流电变单相交流电的交流变相电机;所述斯科特变压器的输出端电性连接于所述两相对称交流电变单相交流电的交流变相电机的输入端,用于来自公用电网的330kV、220kV或110kV三相交流电变换为13.75kV两相对称交流电;所述两相对称交流电变单相交流电的交流变相电机用于将13.75kV两相对称交流电变换为27.5kV单相交流电输出接触网。本发明通过斯科特变压器将三相电变换为两相交流电,再通过变相电机将两相交流电变换为单相交流电,解决了三相不平衡的问题,兼顾分相、谐波和无功问题,结构简单,可靠性高并且造价较低。


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    Title :

    Traction power supply system and method for converting two-phase symmetrical alternating current into single-phase alternating current


    Additional title:

    一种两相对称交流电变单相交流电的牵引供电系统及方法


    Contributors:
    XIAO SHUYIN (author) / LUO YUEBING (author) / WANG JIAN (author) / LI GUODONG (author) / LIN WUBIN (author) / ZHAO ZONGBAO (author) / LIU BO (author) / MENG FANXIN (author) / LI CAN (author) / LI XIAOKUN (author)

    Publication date :

    2020-11-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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 / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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