PV Powered PVP260kW Informações Técnicas descarregar pdf (Página 80)

Fault

The inverter enters this state when any fault condition occurs. The inverter can enter this

state from any other state except initialize. Unless the fault is latching, the inverter clears

the fault when the fault condition subsides. The inverter displays the fault codes and

messages indicating the current fault conditions.

If the fault is latching, the inverter switches to the latched fault state. The inverter enters

this state when a latching fault condition occurs. The inverter displays the fault codes and

messages indicating the current fault conditions. When the fault is cleared, the inverter

switches to the sleep state.

Sleep

In this state, the inverter is enabled but the DC voltage is below the minimum operating

window. When the PV input voltage rises above the “starting” voltage, the inverter

switches to the startup delay state.

Startup Delay

In this state, the inverter delays a specied time and then enters the DC precharge state.

The delay depends on the conditions prior to the sleep state and the time taken to reach

this state from the previous shutdown. If a grid interactive fault occurred on the previous

shutdown, the inverter will remain in this state for 5 minutes.

DC Precharge

In this state, the inverter closes the DC precharge-contactor, which limits inrush current

into the DC bus capacitors. When the DC bus voltage reaches the PV input voltage and is

greater than the DC start voltage, the inverter switches to the AC precharge state.

AC Precharge

In this state, the inverter closes the main DC contactor and the AC precharge-contactor,

which limits inrush current into the transformer. Once the transformer is magnetized, the

main AC contactor is closed and the AC pre-charge contactor is opened. After a short

delay the inverter switches to the idle state.

Idle

In this state, the inverter disables the drive PWM and displays a message indicating that

the inverter is idle. The inverter switches to the power tracking state when the DC voltage

is above the DC start voltage. If a fault condition occurs, the inverter switches to the

fault state. If the DC voltage drops below the minimum, the inverter switches to the sleep

state.

Power Track

In this state, the inverter operates in voltage control mode using the maximum power

point tracking (MPPT) function. If a fault occurs, the inverter switches to the fault state.

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