Article,
A Robust Capacitance Control Method for Variable Active Capacitor
Affiliations
- [1] Aalborg University [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD]
Abstract
The active capacitor with variable capacitance control is able to actively and variably mimic the voltage-current characteristics of a physical passive capacitor; however, existing capacitance control methods cannot achieve accurate capacitance control due to parameter and model errors. This paper proposes a capacitance control method for variable active capacitor with improved accuracy and robustness. It applies an iterative learning controller to realize equivalent capacitances according to given reference values. An 800 V/20 A active capacitor prototype is developed and tested under various dynamic operation conditions and circuit parameter shifts to verify the accuracy and robustness of capacitance control.
Keywords
accuracy,
active capacitor,
capacitance,
capacitance control,
capacitor,
characteristics,
circuit,
circuit parameters,
conditions,
control,
control method,
dynamic operating conditions,
error,
improved accuracy,
iterative learning control,
learning control,
method,
model,
model error,
operating conditions,
parameters,
passive capacitors,
prototype,
reference,
reference values,
robustness,
values,
voltage-current characteristics