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Long Horizon Linear MPC of Grid-Connected VSIs: Regulation Problems and a Plug-In Solution

Long Horizon Linear MPC of Grid-Connected VSIs: Regulation Problems and a Plug-In Solution
Long Horizon Linear MPC of Grid-Connected VSIs: Regulation Problems and a Plug-In Solution
This work investigates a linear model predictive control (MPC) in conjunction with a voltage source inverter with a grid-interfacing passive filter. In an ideal grid, standard linear MPC demonstrates fast transient and excellent steady-state performance while respecting the imposed constraints. Nevertheless, its direct application onto the grid-connected converters operating with a distorted grid (e.g. islanded microgrid and marine vessel grid) or with applications that require harmonic current injection would encounter steady-state tracking error [1, 2], leading to unfulfilled application objectives. This shortfall is first demonstrated here using simulation, and then a solution based on plug-in repetitive control (RC) is proposed and investigated. With some assumptions simplifying this investigation, the resulted linear MPC with RC plug-in successfully mitigates the steady-state tracking errors while preserving the applicability of the multi-parametric quadratic-programming - the explicit implementation method that makes the linear MPC feasible in fast sampling applications. It is worth noting here that the notable features of MPC such as simple tuning, fast current response close to the physical limits of the system, and constraints consideration are retained and this makes the proposed control method a powerful alternative to the established grid-converter control techniques.
IEEE
Lim, Chee
616d0697-a5d5-4079-adaa-6686e5a758fe
Lee, Sze Sing
47f36964-db27-4f5e-a4d3-4b0ba78ce29e
Xin, Kong
420fe9af-bd5a-4826-a9cb-f179843a42a4
Ullah Nutkani, Inam
5dfb8081-41a2-46c6-9666-75a9a658a682
Lim, Chee
616d0697-a5d5-4079-adaa-6686e5a758fe
Lee, Sze Sing
47f36964-db27-4f5e-a4d3-4b0ba78ce29e
Xin, Kong
420fe9af-bd5a-4826-a9cb-f179843a42a4
Ullah Nutkani, Inam
5dfb8081-41a2-46c6-9666-75a9a658a682

Lim, Chee, Lee, Sze Sing, Xin, Kong and Ullah Nutkani, Inam (2017) Long Horizon Linear MPC of Grid-Connected VSIs: Regulation Problems and a Plug-In Solution. In IEEE Energy Conversion & Expo. IEEE.. (doi:10.1109/ECCE.2017.8096838).

Record type: Conference or Workshop Item (Paper)

Abstract

This work investigates a linear model predictive control (MPC) in conjunction with a voltage source inverter with a grid-interfacing passive filter. In an ideal grid, standard linear MPC demonstrates fast transient and excellent steady-state performance while respecting the imposed constraints. Nevertheless, its direct application onto the grid-connected converters operating with a distorted grid (e.g. islanded microgrid and marine vessel grid) or with applications that require harmonic current injection would encounter steady-state tracking error [1, 2], leading to unfulfilled application objectives. This shortfall is first demonstrated here using simulation, and then a solution based on plug-in repetitive control (RC) is proposed and investigated. With some assumptions simplifying this investigation, the resulted linear MPC with RC plug-in successfully mitigates the steady-state tracking errors while preserving the applicability of the multi-parametric quadratic-programming - the explicit implementation method that makes the linear MPC feasible in fast sampling applications. It is worth noting here that the notable features of MPC such as simple tuning, fast current response close to the physical limits of the system, and constraints consideration are retained and this makes the proposed control method a powerful alternative to the established grid-converter control techniques.

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Published date: 2017

Identifiers

Local EPrints ID: 434668
URI: https://eprints.soton.ac.uk/id/eprint/434668
PURE UUID: fbbdc721-5c90-4e67-874a-e705d03899c9
ORCID for Sze Sing Lee: ORCID iD orcid.org/0000-0003-2455-5783

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Date deposited: 04 Oct 2019 16:30
Last modified: 10 Dec 2019 01:22

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Contributors

Author: Chee Lim
Author: Sze Sing Lee ORCID iD
Author: Kong Xin
Author: Inam Ullah Nutkani

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