Optimal controller gains for inner current controllers in VSC inverters

A.D. Giles, L. Reguera, A.J. Roscoe

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

The standard method for controlling an IGBT inverter (or any VSC inverter for that matter) is by vector current control. This control system consists of two cascaded control loops. One possible realisation of the outer controller is to control the DC bus voltage such that no more power is taken off the DC bus than is available. This creates a current reference, which is fed into the inner current controller. The inner current controller then regulates the current passing through the IGBT such that the desired power is dispatched onto the grid. Whilst most research treats the grid connection as a simple RL circuit, there is little consistency on the method by which the gains of the inner current controller are selected. Internal model control, modulus optimum and root locus methods are just a few of the methods used to find the gains. However, it is not clear which of these methods yields the best performance of the inner current controller. This work suggests that tuning on phase margin or manually tuning may not achieve the best results.
LanguageEnglish
Title of host publicationInternational Conference on Renewable Power Generation (RPG 2015), 2015
Number of pages6
DOIs
Publication statusPublished - 18 Oct 2015
EventIET Renewable Power Generation (RPG) - Beijing, China
Duration: 17 Oct 201518 Oct 2015

Conference

ConferenceIET Renewable Power Generation (RPG)
CountryChina
CityBeijing
Period17/10/1518/10/15

Fingerprint

Controllers
Insulated gate bipolar transistors (IGBT)
Tuning
Root loci
Electric current control
Control systems
Networks (circuits)
Electric potential

Keywords

  • vector control
  • tuning
  • inverters

Cite this

Giles, A. D., Reguera, L., & Roscoe, A. J. (2015). Optimal controller gains for inner current controllers in VSC inverters. In International Conference on Renewable Power Generation (RPG 2015), 2015 https://doi.org/10.1049/cp.2015.0391
Giles, A.D. ; Reguera, L. ; Roscoe, A.J. / Optimal controller gains for inner current controllers in VSC inverters. International Conference on Renewable Power Generation (RPG 2015), 2015. 2015.
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Giles, AD, Reguera, L & Roscoe, AJ 2015, Optimal controller gains for inner current controllers in VSC inverters. in International Conference on Renewable Power Generation (RPG 2015), 2015. IET Renewable Power Generation (RPG), Beijing, China, 17/10/15. https://doi.org/10.1049/cp.2015.0391

Optimal controller gains for inner current controllers in VSC inverters. / Giles, A.D.; Reguera, L.; Roscoe, A.J.

International Conference on Renewable Power Generation (RPG 2015), 2015. 2015.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Giles AD, Reguera L, Roscoe AJ. Optimal controller gains for inner current controllers in VSC inverters. In International Conference on Renewable Power Generation (RPG 2015), 2015. 2015 https://doi.org/10.1049/cp.2015.0391