for grid-connected and drive applications typically use current control to
regulate the injected active power or the applied electrical torque,
respectively. In recent years stationary frame control has emerged as a
tractable method for implementing current control. Most stationary frame
controllers are based on the continuous resonant controller. Practical
implementation requires that all continuous transfer functions be discretized,
leading to a possible degradation in controller performance. An interesting
alternative for three-phase applications is the one-pole complex resonator. As
a complex transfer function, the complex resonator has single-sided frequency
response rendering different behavior to the continuous resonant controller.
Moreover, the complex resonator is directly implemented in the discrete domain
thereby avoiding a loss of fidelity in a discretization process.
In this project the candidate will
develop a current controller structure based on the complex resonator. The
performance of the complex current controller will be compared to that of a
continuous and discretized resonant controller.
on the student’s ambitions, the project may consist of the following steps:
Literature review of synchronous and
stationary frame current controllers.
Development of simulation model for
benchmarking the continuous and discrete controllers.
Develop an opportune complex resonator
structure for use as a current controller.
Compare the performance of continuous
resonator and complex resonator current controllers.
Implement the complex resonator in a
lab setup (to be decided between the student and supervisor).