NDLI: A Sensorless Implementation of the Parabolic Current Control for Single-Phase Stand-Alone Inverters

Content Provider	IEEE Xplore Digital Library
Author	Lanhua Zhang Born, R. Bin Gu Baifeng Chen Cong Zheng Xiaonan Zhao Jih-Sheng Lai
Copyright Year	1986
Abstract	Parabolic current control is an attractive current control method with fast transient response and constant switching frequency. Due to the good dynamics of the parabolic current control, it can be employed in voltage source inverters to improve the system performance such as minimizing the distortion of current waveforms or voltage waveforms. To implement the parabolic current control, a current sensor is required, associated with the current conditioning circuit and parabolic carrier generators. Since the parabolic current control is based on the real-time information of the inductor current, any phase delay or propagation delay of the sensor itself and the conditioning circuitry, or limited resolution of parabolic carrier generators, could impact the current control performance. Since the parabolic current control compares analog signals to generate the required control signals, noise from the control board impacts the control precision as well. This paper will explore solutions to these problems. First, the inductor current of the voltage source inverter is analyzed and the parabolic current control strategy is studied, then a sensorless parabolic current control method is proposed. The new sensorless parabolic control method utilizes a current emulator to rebuild the inductor current on a microcontroller. To avoid a dc offset on the ac-side output voltage caused by the current emulator, an additional control loop in the current emulator is added. The effectiveness of the proposed methods is experimentally verified by the use of an H-bridge voltage source inverter.
Sponsorship	IEEE Power Electronics Society
Starting Page	3913
Ending Page	3921
Page Count	9
File Size	1031679
File Format	PDF
ISSN	08858993
Volume Number	31
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current control Inverters Voltage control Inductors Switching frequency Hysteresis Switches non-linear current control Parabolic current control sensorless current control current tracking error voltage source inverters hysteresis current control voltage source inverters (VSIs) Current tracking error nonlinear current control parabolic current control (PCC)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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