Sliding mode direct power control strategy of a power quality based on a sliding mode observer

2014 ◽  
Vol 56 ◽  
pp. 325-331 ◽  
Author(s):  
Ali Djerioui ◽  
Kamel Aliouane ◽  
Farid Bouchafaa
Keyword(s):  
Power Control ◽  
Power Quality ◽  
Control Strategy ◽  
Sliding Mode ◽  
Sliding Mode Observer ◽  
Direct Power ◽  
Direct Power Control

scholarly journals Integral Sliding-Mode Control-Based Direct Power Control for Three-Level NPC Converters

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 227 ◽  
Author(s):  
Hao Lin ◽  
Jose I. Leon ◽  
Wensheng Luo ◽  
Abraham Marquez ◽  
Jianxing Liu ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Power Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Harmonic Distortion ◽  
Direct Power ◽  
Direct Power Control ◽  
Integral Sliding Mode Control ◽  
Integral Sliding Mode ◽  
Mode Control

Three-level neutral-point-clamped (NPC) converter is widely used in energy conversion systems due to its good properties for high-power systems presenting output waveforms with reduced harmonic distortion. To obtain better system performance, an integral sliding-mode control (ISMC)-based direct power control (DPC) strategy is proposed for NPC converters. The controller achieves three objectives. First, an extended state observer (ESO)-based ISMC strategy, to enforce the active and reactive power to their reference values, is applied in the power tracking loop. ESO is used to reduce the influence of parameter uncertainties. Next, in the voltage regulation loop, a radial basis function neural network (RBFNN)-based adaptive ISMC strategy is applied to regulate the DC-link voltage. RBFNN is used to estimate the load variation, which is considered as a disturbance, to improve the system disturbance rejection ability. An adaptive law is used in the controller to reduce the chattering of reference active power which can reduce the current harmonic distortion. Finally, a proportional-integral (PI) control strategy is applied in the voltage balancing loop to achieve voltage balance between two DC-link capacitors. Experimental results show the effectiveness and superiority of the proposed control strategy for the NPC power converter compared with PI-based DPC strategy.

Operation of Direct Power Control Scheme in Grid-Connected Mode Using Improved Sliding Mode Observer and Controller

2018 ◽  
Vol 19 (5) ◽  
Author(s):  
A. Elnady ◽  
M. Al-Shabi
Keyword(s):  
Sliding Mode Control ◽  
Power Control ◽  
Sliding Mode ◽  
Sliding Mode Observer ◽  
Superior Performance ◽  
Direct Power ◽  
Direct Power Control ◽  
Distributed Generator ◽  
Mode Control ◽  
Control Scheme

Abstract This paper introduces the direct power control (DPC) scheme controlled by a new version of the 1st order sliding mode control to operate a distributed generator. This distributed generator is a core of the distributed generation system (DGS), which injects active and reactive power to the distribution system in a grid-connected mode. The presented 1st order sliding mode control based direct power scheme is very efficient in terms of chattering at steady-state and its dynamic performance. The superior performance of the presented control scheme results from a novel combination of an integral form for the sliding surface along with an innovative power-rate reaching law. The feedback power of the direct power scheme is estimated using an accurate developed formulation of the sliding mode observer. The distributed generator is based on the 5-level diode clamped inverter to minimize the injected harmonics. To prove the accurate performance of this new combination of the sliding mode control with sliding mode observer, the developed sliding mode observer is compared to Luenberger observer and the traditional virtual-flux based power estimation. Also, the whole control scheme is compared to other schemes for the same application such as conventional direct power control and conventional sliding mode control based direct power control.

Direct power control strategy for an axial flux permanent magnet synchronous machine

2019 ◽  
Vol 102 (1) ◽  
pp. 481-491
Author(s):  
Juan Torres ◽  
Rubén Peña ◽  
Javier Riedemann ◽  
Juan Tapia ◽  
Roberto Moncada ◽  
...  
Keyword(s):  
Power Control ◽  
Permanent Magnet ◽  
Control Strategy ◽  
Synchronous Machine ◽  
Permanent Magnet Synchronous Machine ◽  
Direct Power ◽  
Axial Flux ◽  
Direct Power Control
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