Backstepping Controller With Dual Self-Tuning Filter for Single-Phase Shunt Active Power Filters Under Distorted Grid Voltage Condition

This article presents the design and hardware implementation of an adaptive nonlinear controller for fast, robust, and stable control of single-phase shunt active power filter. The proposed control system consists of two control loops: an inner harmonic current compensation loop and an outer dc-volt...

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Bibliographic Details
Published in:IEEE transactions on industry applications Vol. 56; no. 6; pp. 7176 - 7184
Main Authors: Jayasankar, V. N., Vinatha, U.
Format: Journal Article
Language:English
Published: New York IEEE 01.11.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Active control
Adaptive control
Algorithms
Backstepping control
Capacitors
Compensation
Control algorithms
Control stability
Control theory
Controllers
dc-link voltage control
Field programmable gate arrays
FPGA implementation
grid connecting inverter
Harmonic analysis
harmonic compensation
Harmonic control
Inverters
Low pass filters
Nonlinear control
power quality
Power system harmonics
Power system stability
Programmable controllers
Robust control
Self tuning
shunt active power filter
Stability analysis
Steady state
Voltage control
Voltage controllers
ISSN:0093-9994, 1939-9367
Online Access:Get full text
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Summary:This article presents the design and hardware implementation of an adaptive nonlinear controller for fast, robust, and stable control of single-phase shunt active power filter. The proposed control system consists of two control loops: an inner harmonic current compensation loop and an outer dc-voltage control loop. The inner loop is realized using self tuning filter based instantaneous power theory (pq theory). The limitations of conventional low-pass filter based fundamental component extraction methods are overcome using self-tuning filter. The outer loop is realized backstepping controller (BSC). The limitations observed in existing dc-link voltage controllers like poor stability margin, steady state error, chattering problem, etc., are overcome by the proposed BSC. The switching loss estimation is introduced in BSC using design estimation rules to enhance the dc-link loss compensation capability. The stability of the system with the proposed controller is studied using Barbalat lemma. A laboratory prototype of BSC based shunt active power filter is implemented. The control algorithm is implemented in a single all on chip field programmable gate array (FPGA). To ensure the effectiveness of the controller in mitigating the harmonic currents and controlling dc-link voltage, the control algorithm is tested under steady state and dynamic conditions.
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ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2020.3025520