Exercise 3 Flashcards
Explain the concept of nested loop control of grid connected converters
Name the three possible control modes of converters
≡ Grid-forming converters
≡ Grid-feeding converters
≡ Grid-supporting converters
Describe how an equivalent circuit with ideal components can represent
each of them?
≡ Grid-forming converters: represented as an ideal voltage source with a lowoutput impedance.
≡ Grid-feeding converters: represented as an ideal current source connected to
the grid in parallel with high impedance.
≡ Grid-supporting converters: represented either as an ideal current source in
parallel with a shunt impedance, or as an ideal voltage source in series with a
link impedance.
Control structure
Grid-forming converters
no real need to answer
Control structure
Grid-feeding converters
no real need to answer
Control structure
Grid-Supporting Converter in AC Microgrid (Voltage Source)
no real need to answer
Do Task 1b (DC-link Control loop)
Formeln von:
PI Controller
Delay
Filter (plant)
Design Parameters of the PI Controller:
Simplification
Second order system to compare
Values for optimally damped system
J_id = K_pd/T_id
Design the DC-link voltage controller
Very important formulas to remember regarding the Design of the DC-link voltage controller
