Single-Phase MPP-Tracking of a PV Generator on a Resistor

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Essential data of the PV generator with 4 modules in series, all at STC:

• $U_{PV,oc} = 86.4 V$
• $U_{PV,MPP} = 70.4 V$
• $I_{PV,sc} = 6.14 A$
• $I_{PV,MPP} = 5.68 A$
• $P_{PV,MPP} = 400 W$

Steps

1. Modelling a PV generator depending on irradiation and temperature in PLECS
   • Lookup-table using PLECS block
2. Setting up a simulation environment: Refining template and extending it with MPP algorithm
   • Maximize power, voltage not important
   • Measure average power over up to 3 periods via effective capacitor current, $\rightarrow$ sensor can also be used for load drop detection
   • Transformer ratio?
   • Operating points for different modulation degrees m from 0 (idle) to 1 (short circuit) (ramp m with PV generator connected should return characteristic curve)
3. Load drop detection: Smart shutdown and start-up routine with detection if load is present.
   • System can oscillate (LC undamped)
   • only with sensor for capacitor voltage and current
4. Getting acquainted with code generation for STM32
5. Research for a platform / concept for Auxiliaury Power
   • H-bridge, which can be easily connected to sensors and STM

Todo

• [ ] move steps to project board

PLECS

1. Install PLECS Standalone.
2. Get a Student License. Use your smail address (...@smail.th-koeln.de).