The invention discloses a traction power supply method for converting three-phase symmetrical alternating current into single-phase alternating current. The method specifically comprises the followingsteps of: converting 110kV three-phase symmetrical alternating current into 27.5 kV single-phase alternating current and outputting the 27.5 kV single-phase alternating current to an overhead contactsystem by using an alternating current phase-changing motor for converting the three-phase symmetrical alternating current into the single-phase alternating current, which is arranged in a traction substation; no matter how the single-phase traction load changes randomly, the load current of the input side of the alternating-current phase-changing motor for changing the three-phase symmetrical alternating current into the single-phase alternating current is always kept symmetrical, and no negative-sequence current exists in the traction power supply system. The three-phase alternating currentis converted into the single-phase alternating current through the alternating current phase-changing motor for converting the three-phase symmetrical alternating current into the single-phase alternating current, 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, andthe manufacturing cost is low.
本发明公开了一种三相对称交流电变单相交流电的牵引供电方法,具体为:设置在牵引变电所的三相对称交流电变单相交流电的交流变相电机将110kV三相对称交流电变换为27.5kV单相交流电输出接触网,且无论单相牵引负荷如何随机变化,所述三相对称交流电变单相交流电的交流变相电机的输入侧负荷电流始终保持对称,牵引供电系统中不存在负序电流。本发明通过三相对称交流电变单相交流电的交流变相电机将三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。
Traction power supply method for converting three-phase symmetrical alternating current into single-phase alternating current
一种三相对称交流电变单相交流电的牵引供电方法
2020-11-20
Patent
Electronic Resource
Chinese
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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Engineering Index Backfile | 1918
Traction by single-phase alternating current at 15,000 volts
Engineering Index Backfile | 1906
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