At this point, the power-on operation of the energy storage system is completed, and then the
subsequent control logic will be collaborated by CSU, CMU, BCU, BMU, fire protection system,
liquid cooling unit and other modules.
Figure 6.4 PCS AC side switch QA0 of energy storage cabinet
6.3 Power-down operation under normal conditions
During power-down operation, the PCS AC side module case circuit breaker QA0, the battery
disconnect switch QB in the high voltage box, and the battery cluster positive and negative bus plugs
should be avoided to be switched on and off or plugged in with load. Insulation protection measures
are required for the personnel performing the power-down operation.
The procedure for normal power-down operation is as follows:
1) It is necessary to carry out the power-down operation on the WEB interface first. After the
power down command is issued, if there is a PCS connected, the PCS should stop charging and
discharging first, and then the battery cluster will automatically carry out the power down operation,
and at the same time, the two positive and negative main relays (KF1 and KF2) and auxiliary relay
(KF4) inside the corresponding high-voltage box should be able to be disconnected.
2) Manually disconnect all high-voltage box battery disconnect switches QB in the energy storage
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