The invention relates to a direct-current voltage control method of a rail transit bidirectional converter device, and belongs to the technical field of rail transit power supply systems. The method comprises the steps that a bidirectional converter device and a diode rectifier unit operate in parallel, and when there is no load in a line, the bidirectional converter device operates in a standby mode and outputs no power to the outside; when a train is braked, the voltage of a direct-current bus rises, the bidirectional converter device is converted from a standby state to inversion voltage stabilization operation, the diode rectifier unit is cut off at the moment, and the bidirectional converter device feeds back the braking energy to an alternating-current power grid; and when the train is dragged to run, the voltage of the direct-current bus of a substation is reduced, and the bidirectional converter device is converted into traction rectification operation from a standby state and supplies traction energy to the train together with the diode rectifier unit. The method has the advantages that constant-voltage control is adopted in the double-inverter mode, and the network voltage of a train is prevented from being too high; and in the rectification mode, droop control is adopted, the bidirectional converter device and the rectifier unit jointly output power to provide traction power required by the train, and the network voltage of the train is prevented from being too low.
本发明涉及一种轨道交通双向变流装置的直流电压控制方法,属于轨道交通供电系统技术领域。包括双向变流装置和二极管整流机组并联运行,当线路无负荷时,双向变流装置待机运行,对外无功率输出;当车辆制动时,直流母线电压升高,双向变流装置从待机转为逆变稳压运行,此时二极管整流机组截止,双向变流装置将制动能量回馈到交流电网;当车辆牵引运行时,变电所直流母线电压降低,双向变流装置由待机转为牵引整流运行,与二极管整流机组共同向列车提供牵引能量。本发明的有益效果是:双逆变模式下采用恒压控制,避免列车网压过高;整流模式下采用下垂控制,双向变流装置与整流机组共同出力提供列车所需牵引功率,避免列车网压过低。
Direct-current voltage control method of rail transit bidirectional converter device
一种轨道交通双向变流装置的直流电压控制方法
2021-04-16
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES |
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