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UM1561 датащи(PDF) 36 Page - STMicroelectronics

номер детали UM1561
подробное описание детали  This document describes how the firmware to manage the 250 W micro-inverter demo
PDF  39 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM1561 датащи(HTML) 36 Page - STMicroelectronics

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Input/output protection
UM1561
36/39
Doc ID 023556 Rev 1
11
Input/output protection
The power board is also controlled by the microcontroller for the input/output protection.
During normal operation it is possible that the cables (input or output side) are accidentally
disconnected from the panel or from the grid. In this case, overcurrent or overvoltage may
appear at the power stage. To avoid damaging the electronic parts, a procedure is
implemented in the 250WControl.c file, as follows:
if (BusFiltered > 13000)
{
Fault = BUS_OVERVOLTAGE;
GPIO_ResetBits(GPIOA, GPIO_Pin_1);
State_Control = STOP_WITH_DELAY;
Diagnostic_Control=BUS_OVERVOLTAGE;
}
if (BusFiltered < 9880 && MPPT_EN==TRUE)
{
Fault = BUS_UNDERVOLTAGE;
GPIO_ResetBits(GPIOA, GPIO_Pin_1);
State_Control = STOP_WITH_DELAY;
Diagnostic_Control=BUS_UNDERVOLTAGE;
}
where:
●
Fault = BUS_OVERVOLTAGE;
is (Bus overvoltage detected)
●
Fault = BUS_UNDERVOLTAGE;
is (Bus undervoltage detected).
if((qIalpha_Inverter > 19667 || qIalpha_Inverter <-19667) &&
State_Control==GRID_INSERTION && MPPT_EN==TRUE) //1.6 max output peak
current
{
Fault = OUT_CURRENT_LIMIT;
GPIO_ResetBits(GPIOA, GPIO_Pin_1);
State_Control = STOP_WITH_DELAY;
Diagnostic_Control=OUT_CURRENT_LIMIT;
}
where:
●
GPIO_ResetBits(GPIOA, GPIO_Pin_1);
is (AC line overcurrent detected)
●
State_Control = STOP_WITH_DELAY;
is (PV_module Vmin detected).
if(PV_Voltage<=11000 && State_Control==GRID_INSERTION) //22V min
{
GPIO_ResetBits(GPIOA, GPIO_Pin_1);
State_Control = STOP_WITH_DELAY;
Diagnostic_Control=PV_VOLTAGE_MIN;
}



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