Nonlinear adaptive control of grid-connected three-phase inverters for renewable energy applications

2015 ◽  
Vol 90 (1) ◽  
pp. 53-67 ◽  
Author(s):  
N. Mahdian-Dehkordi ◽  
M. Namvar ◽  
H. Karimi ◽  
P. Piya ◽  
M. Karimi-Ghartemani
Keyword(s):  
Adaptive Control ◽  
Renewable Energy ◽  
Nonlinear Adaptive Control ◽  
Energy Applications ◽  
Three Phase

scholarly journals Impedance-Based Interactions in Grid-Tied Three-Phase Inverters in Renewable Energy Applications

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 464 ◽  
Author(s):  
Teuvo Suntio ◽  
Tuomas Messo ◽  
Matias Berg ◽  
Henrik Alenius ◽  
Tommi Reinikka ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Experimental Measurements ◽  
Stability Assessment ◽  
Transient Performance ◽  
Energy Applications ◽  
Impedance Ratio ◽  
Three Phase ◽  
The Cross ◽  
And Performance ◽  
The Stability

Impedance-ratio-based interaction analyses in terms of stability and performance of DC-DC converters is well established. Similar methods are applied to grid-connected three-phase converters as well, but the multivariable nature of the converters and the grid makes these analyses very complex. This paper surveys the state of the interaction analyses in the grid-connected three-phase converters, which are used in renewable-energy applications. The surveys show clearly that the impedance-ratio-based stability assessment are usually performed neglecting the cross-couplings between the impedance elements for reducing the complexity of the analyses. In addition, the interactions, which affect the transient performance, are not treated usually at all due to the missing of the corresponding analytic formulations. This paper introduces the missing formulations as well as explicitly showing that the cross-couplings of the impedance elements have to be taken into account for the stability assessment to be valid. In addition, this paper shows that the most accurate stability information can be obtained by means of the determinant related to the associated multivariable impedance ratio. The theoretical findings are also validated by extensive experimental measurements.

scholarly journals Three phase modular multilevel inverter-based multi-terminal asymmetrical DC inputs for renewable energy applications

2020 ◽  
Vol 23 (4) ◽  
pp. 831-839 ◽  
Author(s):  
Taiea A. Ahmed ◽  
Essam E.M. Mohamed ◽  
Abdel-Raheem Youssef ◽  
A.A. Ibrahim ◽  
Mahmoud S.R. Saeed ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Multilevel Inverter ◽  
Energy Applications ◽  
Three Phase

scholarly journals Output-Feedback Nonlinear Adaptive Control Strategy of Three-phase AC/DC Boost Power Converter for On-line UPS Systems

2016 ◽  
Vol 49 (13) ◽  
pp. 324-329 ◽  
Author(s):  
M. Kissaoui ◽  
A.A.R. Al Tahir ◽  
A. Abouloifa ◽  
F.Z. Chaoui ◽  
Y. Abouelmahjoub ◽  
...  
Keyword(s):  
Adaptive Control ◽  
Control Strategy ◽  
Output Feedback ◽  
Power Converter ◽  
Nonlinear Adaptive Control ◽  
Three Phase ◽  
On Line ◽  
Adaptive Control Strategy

scholarly journals Three-Phase PWM Inverter for Isolated Grid-Connected Renewable Energy Applications

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3701
Author(s):  
Ahmed Ismail M. Ali ◽  
Takaharu Takeshita ◽  
Mahmoud A. Sayed
Keyword(s):  
Renewable Energy ◽  
Single Stage ◽  
Switching Frequency ◽  
Solar Pv ◽  
Pass Filter ◽  
Pwm Inverter ◽  
Energy Applications ◽  
Harmonic Elimination ◽  
Three Phase ◽  
Harmonic Components

This paper proposes a three-phase isolated flyback inverter (IFBI) for single-stage grid-tied solar PV applications, considering a simple sinusoidal pulse-width modulation (SPWM) scheme. The proposed single-stage inverter employs a reduced passive elements count by considering three input-parallel output-differential (IPOD) flyback converter modules. Additionally, a single small size LC-input low-pass filter is utilized at the input paralleling point for ripple-free input current operation, which is essential in grid-connected renewable energy applications. In addition, a mathematical model of the IFBI is presented to confirm the existence of its low-order harmonic components. A simple PI controller-based control scheme, considering only two loops and five sensors, is used to control the proposed grid-tied IFBI. Continuous modulation scheme (CMS) combined with SPWM is used to diminish the low-frequency harmonic components. Moreover, a simple selective harmonic elimination (SHE) loop is used for second-order harmonic components (SOHC) elimination from grid-injected currents. The SHE has decreased the SOHC from 43% to 0.96%, which improves the grid current THD from 39% to 3.65%, to follow the IEEE harmonic standard limits. Additionally, the harmonic elimination technique decreases the circulating power between the inverter paralleled modules, which enhances the grid currents power factor. The proposed inverter is verified through a grid-connected 200 V, 1.6 kW, 60 Hz experimental prototype, and the switching frequency is 50 kHz. TMS-based DSP controller is used to control the grid-injected power to follow the reference power set-point.

scholarly journals Three phase PUC5 inverter fed induction motor for renewable energy applications

2020 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
V V Nagaraju Goriparthi ◽  
Gudapati Sambasiva Rao
Keyword(s):  
Renewable Energy ◽  
Induction Motor ◽  
Renewable Energy Sources ◽  
Dynamic Performance ◽  
Industrial Applications ◽  
Voltage Balancing ◽  
Energy Applications ◽  
Pv Panel ◽  
Three Phase ◽  
Minimum Number

<p>This paper gives the overview three phase 5 level packed U cell (PUC5) inverter fed Induction Motor feed from renewable energy sources for electric vehicles and water pump set in agriculture applications. PUC5 inverter requires a minimum number of semiconductor devices, one PV panel and only one capacitor in each phase. Maximum all possible switching sequences are analyzed and sensor less voltage balancing technique depending on simple switching modes was integrated as level shifted PWM controller for control the PUC5 inverter switches. Sensor less voltage balancing fixes the capacitor voltage (V<sub>c</sub>) at half of the PV source (V<sub>dc</sub>) magnitude in each phase, which results the symmetric five level wave in phase voltage output and seven level waveform in line voltage with less harmonics. This topology minimizes the complication in the control system which creates the PUC5 inverter most suitable for industrial applications and market requirements.<strong> </strong>It is compared with other popular multilevel inverters In terms of component count, voltage rating, voltage balancing and complexity etc. In order to test the performance proposed PUC inverter it is tested with rated load with Matlab/Simulink. The results obtained have shown good dynamic performance under different conditions.</p>

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