Combined voltage
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This post was last edited by zhaohh3211 on 2010-6-8 07:54. The bus voltage in the DC system of the 110kV substation is shown to be 275V. Is this normal? What is the normal range for bus voltage?
It’s abnormal; generally, the voltage of the combined system is 220V as per the theoretical design. With 18 12V batteries, the maximum voltage reaches 248V, and any higher voltage will damage the control circuit. If the voltage reaches 275V, the voltage-reducing thyristor on the control bus can only reduce it to around 235V; as a result, the components in the secondary circuit are often damaged.
It’s already significantly high! The voltage of the closing busbar is the voltage of the battery, which ranges up to 248V.
The voltage on the closing busbars is usually 110 or 220 volts DC, right? Could there be an issue with the display?