Preprint Article Version 1 NOT YET PEER-REVIEWED

A Multi-Slope Sliding-Mode Control Approach for Single-Phase Inverters under Different Loads

  1. Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran
Version 1 : Received: 18 July 2016 / Approved: 19 July 2016 / Online: 19 July 2016 (04:54:06 CEST)

A peer-reviewed article of this Preprint also exists.

Khajeh-Shalaly, B.; Shahgholian, G. A Multi-Slope Sliding-Mode Control Approach for Single-Phase Inverters under Different Loads. Electronics 2016, 5, 68. Khajeh-Shalaly, B.; Shahgholian, G. A Multi-Slope Sliding-Mode Control Approach for Single-Phase Inverters under Different Loads. Electronics 2016, 5, 68.

Journal reference: Electronics 2016, 5, 68
DOI: 10.3390/electronics5040068

Abstract

In this paper, a new approach to the sliding-mode control of single-phase inverters under linear and non-linear loads is introduced. The main idea behind this approach is to utilize a non-linear, flexible and multi-slope function in controller structure. This non-linear function makes the controller possible to control the inverter by a non-linear multi-slope sliding surface. In general, this sliding surface has two parts with different slopes in each part and the flexibility of the sliding surface makes the multi-slope sliding-mode controller (MSSMC) possible to reduce the total harmonic distortion, to improve the tracking accuracy, and to prevent overshoots leading to undesirable transient-states in output voltage which are occurred when the load current sharply rises. In order to improve the tracking accuracy and to reduce the steady-state error, an integral term of the multi-slope function is also added to the sliding surface. The improved performance of the proposed controller is confirmed by simulations and finally, the results of the proposed approach are compared with a conventional SMC and a SRFPI controller.

Subject Areas

multi-slope sliding-mode control (MSSMC); single-phase inverter; multi-slope function (MS)

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