Abstract:

In response to problem single battery open circuit in traditional series DC power supply to lead to decrease the reliability of the entire battery power supply and require the battery to detach from the bus core capacity.A new DC power supply system based on the battery guard component is proposed.The system improves the reliability of the DC power supply system through battery protection components,and has functions such as online battery capacity verification.According to relevant regulations,a scheme for a 110 kV substation is implemented.The system test results and operating conditions meet the design expectations,which can prove that the proposed scheme has application and promotion value.

Key words: battery guard, DC power supply, online battery capacity detect, substation