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Comparison of current control strategies based on FCS-MPC and D-PI-PWM control for actively damped VSCs with LCL-filters

Comparison of current control strategies based on FCS-MPC and D-PI-PWM control for actively damped VSCs with LCL-filters
Comparison of current control strategies based on FCS-MPC and D-PI-PWM control for actively damped VSCs with LCL-filters
This paper presents a comparative study of the proportional-integral-based (PI-based) synchronous current control strategy with derivative-feedback-based active damping and the finite-control-set model-predictive-control-based (FCS-MPC-based) synchronous current control strategy with cost-function-based active damping. For a fair comparison, the sensor requirement and the average switching frequency of FCS-MPC are made equivalent to that of the pulse-width-modulation-based counterpart through internal model estimation and control sampling frequency adjustment. The comparative study considers gain/weighting-factor tuning, delay compensation, switching harmonics, and active damping performance at the critical frequency operating point. The overall performance of both schemes is validated through the same experimental setup and test scenarios. The results conclude that the emerging FCS-MPC has the potential to produce similar results as the classical PI-based counterpart while carrying some practical features. These include being intuitive in active damping design and tuning, guaranteeing fast dynamics, and being sufficiently robust to grid impedance shifting. These findings essentially justify the potential of model predictive control being a viable alternative for this area of application.
2169-3536
112410
Lim, Chee Shen
616d0697-a5d5-4079-adaa-6686e5a758fe
Lee, Sze Sing
bd57e2af-031e-4ff1-aa50-9c0189a813bc
Wong, Yi Chyn Cassandra
1588a283-b610-4dd6-86d1-a3f960e7362b
Ullah Nutkani, Inam
5dfb8081-41a2-46c6-9666-75a9a658a682
Goh, Hui Hwang
ebfacf54-f171-4cca-a64e-e9d9a7d4ae53
Lim, Chee Shen
616d0697-a5d5-4079-adaa-6686e5a758fe
Lee, Sze Sing
bd57e2af-031e-4ff1-aa50-9c0189a813bc
Wong, Yi Chyn Cassandra
1588a283-b610-4dd6-86d1-a3f960e7362b
Ullah Nutkani, Inam
5dfb8081-41a2-46c6-9666-75a9a658a682
Goh, Hui Hwang
ebfacf54-f171-4cca-a64e-e9d9a7d4ae53

Lim, Chee Shen, Lee, Sze Sing, Wong, Yi Chyn Cassandra, Ullah Nutkani, Inam and Goh, Hui Hwang (2019) Comparison of current control strategies based on FCS-MPC and D-PI-PWM control for actively damped VSCs with LCL-filters. IEEE Access, 7, 112410. (doi:10.1109/ACCESS.2019.2934185).

Record type: Article

Abstract

This paper presents a comparative study of the proportional-integral-based (PI-based) synchronous current control strategy with derivative-feedback-based active damping and the finite-control-set model-predictive-control-based (FCS-MPC-based) synchronous current control strategy with cost-function-based active damping. For a fair comparison, the sensor requirement and the average switching frequency of FCS-MPC are made equivalent to that of the pulse-width-modulation-based counterpart through internal model estimation and control sampling frequency adjustment. The comparative study considers gain/weighting-factor tuning, delay compensation, switching harmonics, and active damping performance at the critical frequency operating point. The overall performance of both schemes is validated through the same experimental setup and test scenarios. The results conclude that the emerging FCS-MPC has the potential to produce similar results as the classical PI-based counterpart while carrying some practical features. These include being intuitive in active damping design and tuning, guaranteeing fast dynamics, and being sufficiently robust to grid impedance shifting. These findings essentially justify the potential of model predictive control being a viable alternative for this area of application.

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Accepted/In Press date: 29 July 2019
e-pub ahead of print date: 9 August 2019
Published date: 26 August 2019

Identifiers

Local EPrints ID: 434553
URI: https://eprints.soton.ac.uk/id/eprint/434553
ISSN: 2169-3536
PURE UUID: 44e2cba9-4a29-49af-a899-47653b1f4fd5

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Date deposited: 01 Oct 2019 16:30
Last modified: 01 Oct 2019 16:30

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Contributors

Author: Chee Shen Lim
Author: Sze Sing Lee
Author: Yi Chyn Cassandra Wong
Author: Inam Ullah Nutkani
Author: Hui Hwang Goh

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