scholarly journals Adaptive hysteresis band current control‐based power conditioner to improve the power quality of V/V railway supply system

2019 ◽  
Vol 47 (9) ◽  
pp. 1554-1554
Author(s):  
Amin Beirami ◽  
Hassan Feshki Farahani
Keyword(s):  
Power Quality ◽  
Supply System ◽  
Current Control ◽  
Power Conditioner

State Feedback Current Control of the Three-Phase Grid Connected Power Inverter for the Regenerative Loads

2013 ◽  
Vol 647 ◽  
pp. 935-938
Author(s):  
Marian Gaiceanu ◽  
Adriana Burlibasa ◽  
Cristian Eni ◽  
Mihaita Coman
Keyword(s):  
Steady State ◽  
Power Quality ◽  
State Feedback ◽  
Power Converters ◽  
Power Converter ◽  
Current Control ◽  
Current Loop ◽  
Three Phase ◽  
Simulation Results

Grid-connected power converters are controlled by the current loop, the voltage being delivered by the grid. The proposed state feedback current control has three components: the state feedback, the forcing component to achieve the desired state x1 and the compensating feed forward of the perturbation. Moreover, the control of the power converter, through the external DC-link voltage loop, and internal current loop, assures zero steady state error, and power quality performances. In order to prove the quality of the proposed control, a regenerative load has been used, and the corresponding simulation results are provided.

scholarly journals Optimal Voltage and Frequency Control of an Islanded Microgrid using Grasshopper Optimization Algorithm

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3191 ◽  
Author(s):  
Touqeer Ahmed Jumani ◽  
Mohd Wazir Mustafa ◽  
Madihah Md Rasid ◽  
Nayyar Hussain Mirjat ◽  
Zohaib Hussain Leghari ◽  
...  
Keyword(s):  
Power Quality ◽  
Optimization Algorithm ◽  
Pi Controller ◽  
Parameter Selection ◽  
Current Control ◽  
Control Architecture ◽  
Frequency Regulation ◽  
Grasshopper Optimization Algorithm ◽  
Grasshopper Optimization

Due to the lack of inertia and uncertainty in the selection of optimal Proportional Integral (PI) controller gains, the voltage and frequency variations are higher in the islanded mode of the operation of a Microgrid (MG) compared to the grid-connected mode. This study, as such, develops an optimal control strategy for the voltage and frequency regulation of Photovoltaic (PV) based MG systems operating in islanding mode using Grasshopper Optimization Algorithm (GOA). The intelligence of the GOA is utilized to optimize the PI controller parameters. This ensures an enhanced dynamic response and power quality of the studied MG system during Distributed Generators (DG) insertion and load change conditions. A droop control is also employed within the control architecture, alongside the voltage and current control loops, as a power-sharing controller. In order to validate the performance of the proposed control architecture, its effectiveness in regulating MG voltage, frequency, and power quality is compared with the precedent Artificial Intelligence (AI) based control architectures for the same control objectives. The effectiveness of the proposed GOA based parameter selection method is also validated by analyzing its performance with respect to the improved transient response and power quality of the studied MG system in comparison with that of the Particle Swarm Optimization (PSO) and Whales Optimization Algorithm (WOA) based parameter selection methods. The simulation results establish that the GOA provides a faster and better solution than PSO and WOA which resulted in a minimum voltage and frequency overshoot with minimum output current and Total Harmonic Distortion (THD).

scholarly journals Design of a Measuring System for Electricity Quality Monitoring within the SMART Street Lighting Test Polygon: Pilot Study on Adaptive Current Control Strategy for Three-Phase Shunt Active Power Filters

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1718 ◽  
Author(s):  
Radek Martinek ◽  
Petr Bilik ◽  
Jan Baros ◽  
Jindrich Brablik ◽  
Radana Kahankova ◽  
...  
Keyword(s):  
Power Quality ◽  
Control Strategy ◽  
Active Power ◽  
Current Control ◽  
Measuring System ◽  
Street Lighting ◽  
Active Power Filters ◽  
Power Filters ◽  
Three Phase

This study focuses on the design of a measuring system for monitoring the power quality within the SMART street lighting test polygon at university campuses with relation to testing an adaptive current control strategy for three-phase shunt active power filters. Unlike conventional street lighting, SMART elements are powered 24/7. Due to the electronic character of the power part of such mass appliances, there are increased problems with the power quality of the electric energy. Compared to the current concept of street lighting, there is a significant increase in the content of higher current harmonic components, which cause several problems in the distribution system. The test polygon contains 16 luminaires made by various manufacturers and mounted with various SMART components. Using the polygon control and monitoring system, dynamic load scenarios were selected. These scenarios tested the possibilities of different adaptive current control strategies for three-phase shunt active power filters to improve the power quality of electricity. This study focuses on three adaptive algorithms that respond to dynamic changes of current harmonics level in real-time. The possibility of active filter control was tested using FPGA, mainly due to the low latency of the filter control part.

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