TYPE 75: ELECTRIC CONVERTER
This subroutine models a DC/AC inverter and a DC/DC converter after /1/.
The power loss for both modes is calculated with this equation:
The inverter/converter can have either output or input power as input for the calculations (output if the system is connected to a load or input if the system is connected to the electric power net).
The converter/inverter is disconnected when the input voltage, output voltage or power is zero.
TRNSYS Component Configuration
PARAMETER NO. DESCRIPTION
1: mode - 1 = Connected to the electric power net 2 = Connected to a load
2: Pn - Characteristic output power for one module
3: P0pn - Idling constant for a converter or inverter module (P0pn = P0/Pn, P0 [W] power loss when there is a voltage over the inverter or converter)
4: Us - Set voltage for a module
5: Ripn - Inner resistance constant for a Module of converter or inverter (Ripn = Ri*pn, Ri [Ohm] Inner resistance for a module)
INPUT NO. DESCRIPTION
1: Uin - Voltage in to the converter or inverter
2: Uout - Voltage out of the converter or inverter
3: P - Power ; mode = 1 : Input power known, mode = 2 : Output power known
4: mp - Number of parallel connected modules
OUTPUT NO. DESCRIPTION
1: Uout - Voltage out of the converter or inverter
2: Iout - Current out of the converter or inverter
3: Pout - Power out of the converter or inverter
4: Z - Power efficiency of the converter or inverter
5: Uin - Voltage in to the converter or inverter
6: Iin - Current in to the converter or inverter
7: Pin - Power in to the converter or inverter
8: Ploss - The power loss in the converter or inverter
Informational Flow Diagrams
/1/ Hermann Laukamp, Wechselrichter f9r Photovoltaik-Anlagen, FhG-ISE Freiburg, 1988.