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Energies 2016, 9(11), 974; doi:10.3390/en9110974

Improving the Stability and Accuracy of Power Hardware-in-the-Loop Simulation Using Virtual Impedance Method

School of Electrical Engineering, Wuhan University, Wuhan 430072, China
State Grid Henan Electric Power Research Institute, Zhengzhou 450000, China
Author to whom correspondence should be addressed.
Academic Editor: Paul Stewart
Received: 13 September 2016 / Revised: 17 October 2016 / Accepted: 17 November 2016 / Published: 22 November 2016
(This article belongs to the Special Issue Next-Generation Low-Carbon Power and Energy Systems)


Power hardware-in-the-loop (PHIL) systems are advanced, real-time platforms for combined software and hardware testing. Two paramount issues in PHIL simulations are the closed-loop stability and simulation accuracy. This paper presents a virtual impedance (VI) method for PHIL simulations that improves the simulation’s stability and accuracy. Through the establishment of an impedance model for a PHIL simulation circuit, which is composed of a voltage-source converter and a simple network, the stability and accuracy of the PHIL system are analyzed. Then, the proposed VI method is implemented in a digital real-time simulator and used to correct the combined impedance in the impedance model, achieving higher stability and accuracy of the results. The validity of the VI method is verified through the PHIL simulation of two typical PHIL examples. View Full-Text
Keywords: power hardware-in-the-loop; impedance model; stability; accuracy; virtual impedance power hardware-in-the-loop; impedance model; stability; accuracy; virtual impedance

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zha, X.; Yin, C.; Sun, J.; Huang, M.; Li, Q. Improving the Stability and Accuracy of Power Hardware-in-the-Loop Simulation Using Virtual Impedance Method. Energies 2016, 9, 974.

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