变电站用蓄电池在线有源逆变核容放电研究

Online Active Inverter Check Discharge of Substation Batteries

利用在线方式控制阀控式密封铅酸蓄电池进行核容放电,蓄电池始终不脱离直流母线,无需后备电池。当母线电压正常,蓄电池直流电经有源逆变放电单元回馈至电网,实现节能环保;当母线电压过低或交流电停电,在线控制器控制蓄电池立即向母线供电,实现母线供电的无缝投切。能通过变电站计算机管理系统,在远方控制核容放电,实现蓄电池管理无人值守。

The valve-regulated sealed lead-acid battery can be controlled online to conduct check discharge.Batteries are always connected with DC bus,so no backup batteries are demanded.When the bus voltage is normal,DC current of the battery returns to power grid via active inverter,realizing energy saving and environmental protection.When the bus voltage is too low or an AC power fails,on-line controller immediately controls the batteries to supply power to DC bus,achieving seamless switching of bus power supply.Using the computer management system of substation,the remote control over check discharge can be implemented for the purpose of unattended battery management.