The invention provides a voltage equilibrium control method and system which are applied to an energy storing device composed of a plurality of unit modules. Each unit module comprises at least two single supercapacitors, the first current working voltage of each single supercapacitor and the second current working voltage of each unit module are monitored and compared with corresponding standard working voltages, so that when it is determined that the first current working voltage is smaller than the first standard working voltage, a charging circuit of a one-way DC/DC module connected with the corresponding single supercapacitor in parallel is controlled to work so as to charge the corresponding single supercapacitor; otherwise, a discharging circuit connected with the corresponding single supercapacitor in parallel is controlled to work so as to discharge the corresponding single supercapacitor; operation is convenient, flexible and high in reliability, the single supercapacitors in the energy storing device are prevented from being permanently damaged due to overcharge and over discharge, and safe and reliable operation of an energy storing type urban rail transit vehicle is guaranteed.
Voltage equilibrium control method and system
2015-04-22
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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