Circulating Current Reduction in Common DC-Link Power-HIL for Drives using SVM with Zero-Sequence Compensation
Paper in proceeding, 2020

A new zero-sequence control technique is presented in this paper in order to eliminate the circulating current flowing in power hardware-in-the-loop test benches for electrical machine emulators. The machine emulator studied in this paper is made up of two three-phase inverters with an inductor connecting their ac-side. Both inverters share the same dc-link allowing circulating flow of the electric energy within this loop in order to emulate the operation of high power machine drives. Unfortunately, common-mode voltage is also freely developed within the loop and creates high circulating currents that act as a disturbance for the control of the inverters. Available control techniques have not managed to completely eliminate this current and common-mode filters are used additionally in order to solve the problem. The proposed zero-sequence control utilizes a modified version of the space vector modulation and reduces the circulating current amplitude up to 2.1% of the phase current, eliminating the need for hardware filters. Simulation results from Matlab/PLECS verify the effectiveness of the developed controller.

Zero-sequence voltage

Circulating current

Power hardware-in-the-loop (P-HIL)

Variable speed drives

Zero-sequence current

Space vector pulse width modulation


Georgios Mademlis

Chalmers, Electrical Engineering, Electric Power Engineering

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering

Nimananda Sharma

Chalmers, Electrical Engineering, Electric Power Engineering

Xiaoliang Huang

Chalmers, Electrical Engineering, Electric Power Engineering

IECON Proceedings (Industrial Electronics Conference)

9781728154145 (ISBN)

IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society
Singapore, Singapore,

iTEM - Integrated Transmission and Electric Motor

Swedish Energy Agency (45622-1), 2018-02-09 -- 2020-09-30.

Subject Categories

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering



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