Loading [a11y]/accessibility-menu.js
Sliding Mode Controller in a Multiloop Framework for a Grid-Connected VSI With LCL Filter | IEEE Journals & Magazine | IEEE Xplore

Sliding Mode Controller in a Multiloop Framework for a Grid-Connected VSI With LCL Filter


Abstract:

This paper proposes a multiloop framework for current control of grid-connected voltage source inverters (VSIs) with LCL output filter. The discrete-time model is of thir...Show More

Abstract:

This paper proposes a multiloop framework for current control of grid-connected voltage source inverters (VSIs) with LCL output filter. The discrete-time model is of third-order with a nonminimum phase zero when controlling the grid side current. This poses some difficulties on the design of most types of controllers. Motivated by this problem, the inner loop is implemented by a discrete-time sliding mode control law to ensure the tracking of the converter side current. This can be achieved regardless the grid impedance and voltage, making the converter to behave like a current source inverter with a capacitive+inductive (CL) filter. Thus, the problem of current control falls from a third-order system to a second-order system. Several types of controllers can be designed to implement the outer loop based on the equivalent CL circuit. In this work, a resonant controller with a virtual resistor was applied. Simulations and experimental results are presented to validate the proposal.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 65, Issue: 6, June 2018)
Page(s): 4714 - 4723
Date of Publication: 13 November 2017

ISSN Information:

Funding Agency:


References

References is not available for this document.