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When faults occur in the energy storage system, the PCS stops operation and
immediately disconnects the DC switch to disconnect the main circuit of the device from
the battery, grid, and load.
In this case, the system continuously monitors whether the fault is removed. If the fault
still persists, the system holds the fault state; and if the fault is removed, the system will
automatically recover after a period of time. If the manual fault recovery function is
activated, the fault state will not be removed until the user presses the start/stop button
or the emergency stop button manually.
5.3
State Switching
When the PCS is powered and enters initial stop state, the control system will perform
self-test to check the control and sensor systems. When the DSP normally starts, the
PCS enters key stop state. In this state, the PCS blocks IGBT pulse and disconnect the
AC and DC switches.
In the standby state, the PCS blocks IGBT pulse, but closes AC and DC switches, and
the PCS is in hot standby state.
The PCS can switch among different modes, and switch conditions are shown in
5-1 Working mode switching diagram
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1 Working mode switching diagram
5.4
Working Mode
5.4.1 On-Grid Mode
In the on-grid mode, the PCS can implement the charging and discharging functions.
On-grid constant power (AC), on-grid constant power (DC), on-grid constant voltage,
and on-grid constant current;
All the on-grid modes are available in the charging and discharging state.
Operation Manual
