According to the bidirectional converter parallel operation circulation suppression self-adaptive control method, firstly, according to the situation that a rail transit traction power supply system represented by the magnitude of the voltage on a direct current traction power grid that the voltage is lower than the normal working minimum voltage, the load is large, the load is small, no load exists, the braking energy is small, and the braking energy is large and is higher than the normal working maximum voltage, dividing the direct current voltage into seven intervals, and controlling the bidirectional converters in the seven interval states to respectively work in a cut-off state, a maximum constant power rectification state, a rectification voltage stabilization state, a cut-off state,a linear inversion state, a maximum constant power inversion state and a medium state. According to the bidirectional converter control method, the corresponding no-load voltage interval when the direct-current traction power grid is in the no-load state is set, so that the bidirectional converter with low or high direct-current voltage detection does not work in the inversion feedback working state and the rectification state in the same time period, and the circulation phenomenon of the bidirectional converter is avoided.
本发明的双向变流器并联运行环流抑制自适应控制方法,首先根据直流牵引电网上的电压大小所表征的轨道交通牵引供电系统所处的低于正常工作最低电压、负载较大、负载较小、空载、制动能量较小、制动能量较大、高于正常工作最高电压,将直流电压划分为7个区间,控制这7个区间状态下的双向变流器分别工作于截止、最大恒功率整流、整流稳压、截止、线性逆变、最大恒功率逆变、介质状态。本发明的双向变流器控制方法,通过设置直流牵引电网空载时对应的空载电压区间,使得直流电压检测偏低或偏高的双向变流器不会在同一时间段内分别工作于逆变回馈工作状态和整流状态,避免了双向变流器环流现象的发生。
Bidirectional converter parallel operation circulation suppression self-adaptive control method
双向变流器并联运行环流抑制自适应控制方法
2021-01-01
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 / 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 |
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