The invention discloses an MMC-based electrified railway energy storage type traction power supply system and a control method, the system comprises a power flow controller, an energy storage system and a single-phase main traction transformer, and the power flow controller comprises a high-voltage matching transformer, a power grid side AC-DC converter and a traction side AC-DC converter; the energy storage system comprises a converter and an energy storage element; acquiring voltage and current data of a load at an outlet of a substation, judging operation conditions of the system, and calculating compensation power of ports of a power flow controller and an energy storage device under each condition; redistributing the reference power of the energy storage device according to the charge state data of each energy storage unit; the reference power of each port is subjected to double-loop control of a power outer loop and a current inner loop to obtain a modulation signal; and a switching signal for controlling the device is generated through nearest level modulation. Recovery and reutilization of regenerative braking energy of the train are achieved, the reliability and the capacity utilization rate of the energy storage system are improved, and negative sequence electric energy quality treatment and compensation device capacity optimization are achieved.
本发明公开了一种基于MMC的电气化铁路储能式牵引供电系统及控制方法,系统包括潮流控制器、储能系统和单相主牵引变压器,潮流控制器包括高压匹配变压器、电网侧交直变流器及牵引侧交直变流器;储能系统包括变换器和储能元件;采集变电所出口处负荷电压和电流数据,对系统运行工况进行判断,计算各工况下潮流控制器和储能装置端口的补偿功率;根据各储能单元的荷电状态数据对储能装置参考功率进行再分配;各端口参考功率经由功率外环和电流内环的双环控制得到调制信号;再经最近电平调制产生控制装置的开关信号。本发明实现了列车再生制动能量的回收与再利用,提高了储能系统的可靠性与容量利用率,实现了负序电能质量治理和补偿装置容量优化。
MMC-based electrified railway energy storage type traction power supply system and control method
基于MMC的电气化铁路储能式牵引供电系统及控制方法
2023-01-13
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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / 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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