scholarly journals Simple Power Quality Compensation with Bidirectional Battery Charger for Electric Vehicles in Single-Phase Three-Wire Distribution Feeders

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2894
Author(s):  
Fuka Ikeda ◽  
Kei Nishikawa ◽  
Yuki Okamoto ◽  
Hiroaki Yamada ◽  
Toshihiko Tanaka ◽  
...  
Keyword(s):  
Power Quality ◽  
Electric Vehicles ◽  
Power Factor ◽  
Single Phase ◽  
Active Power ◽  
Pwm Rectifier ◽  
Battery Charger ◽  
Unity Power Factor ◽  
Power Simulation ◽  
Source Voltage

This paper deals with power quality compensation in single-phase three-wire distribution feeders using a constant DC-capacitor voltage-control (CDCVC)-based strategy of the previously proposed bidirectional battery charger (BBC) for electric vehicles under the distorted source-voltage and load-current conditions. Instantaneous active power flowing into the three-leg pulse-width-modulated (PWM) rectifier in the BBC is discussed. The instantaneous power flowing into the three-leg PWM rectifier demonstrates that the CDCVC-based strategy obtains balanced and sinusoidal source currents at a unity power factor, where the source-side active power is balanced with the load-side active power. Simulation and experimental results demonstrate that balanced and sinusoidal source currents at a unity power factor are attained in single-phase three-wire distribution feeders with both battery-charging and -discharging operations for electric vehicles even though both source voltage and load currents are distorted.

scholarly journals Control of a battery charger for electric vehicles with unity power factor

2021 ◽  
Vol 2 (1) ◽  
pp. 32-44
Author(s):  
Federico M. Serra ◽  
Cristian H. De Angelo
Keyword(s):  
Electric Vehicles ◽  
Power Factor ◽  
Closed Loop ◽  
Constant Current ◽  
Nonlinear Controller ◽  
Battery Charger ◽  
Unity Power Factor ◽  
Single Model ◽  
Electric Vehicle Battery ◽  
Battery Bank

A nonlinear controller for an electric vehicle battery charger is proposed in this work. The controller allows charging the battery bank with constant current and constant voltage charging profile, while ensuring unity power factor and low distortion in the grid current. A single model is made for the complete system and the controller is designed using interconnection and damping assignment. The proposed controller ensures the closed-loop stability and allows decoupling the system avoiding disturbances in the electric grid and battery bank. The proposal is validated with simulation results.

scholarly journals One Cycle Control of a PWM Rectifier a New Approach

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5523
Author(s):  
Rodrigo De A. Teixeira ◽  
Werbet L. A. Silva ◽  
Guilherme A. P. De C. A. Pessoa ◽  
Joao T. Carvalho Neto ◽  
Elmer R. L. Villarreal ◽  
...  
Keyword(s):  
Power Factor ◽  
Digital Signal Processor ◽  
Digital Signal ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
New Approach ◽  
Phase Current ◽  
Common Mode Voltage ◽  
Power Factor Corrector

This paper analyzes a Digital Signal Processor (DSP) based One Cycle Control (OCC) strategy for a Power Factor Corrector (PFC) rectifier with Common-mode Voltage (CMV) immunity. It is proposed a strategy that utilizes an emulated-resistance-controller in closed-loop configuration to set the dc-link voltage to achieve unity power factor (UPF). It is shown that if the PFC can achieve UPF condition and if the phase voltage is only affected by CMV, then phase current is free from CMV, as well as a lead-lag compensator (LLC) to average phase current.

scholarly journals Voltage Rise Regulation with a Grid Connected Solar Photovoltaic System

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7510
Author(s):  
Akinyemi Ayodeji Stephen ◽  
Kabeya Musasa ◽  
Innocent Ewean Davidson
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Photovoltaic System ◽  
Voltage Amplitude ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
Voltage Rise ◽  
Grid Current

Renewable Distributed Generation (RDG), when connected to a Distribution Network (DN), suffers from power quality issues because of the distorted currents drawn from the loads connected to the network over generation of active power injection at the Point of Common Coupling (PCC). This research paper presents the voltage rise regulation strategy at the PCC to enhance power quality and continuous operation of RDG, such as Photovoltaic Arrays (PVAs) connected to a DN. If the PCC voltage is not regulated, the penetration levels of the renewable energy integration to a DN will be limited or may be ultimately disconnected in the case of a voltage rise issue. The network is maintained in both unity power factor and voltage regulation mode, depending on the condition of the voltage fluctuation occurrences at the PCC. The research investigation shows that variation in the consumer’s loads (reduction) causes an increase in the power generated from the PVA, resulting in an increase in the grid current amplitude, reduction in the voltage of the feeder impedance and an increase in the phase voltage amplitude at the PCC. When the system is undergoing unity power factor mode, PCC voltage amplitude tends to rises with the loads. Its phase voltage amplitude rises above an acceptable range with no-loads which are not in agreement, as specified in the IEEE-1547 and Southern Africa grid code prerequisite. Incremental Conduction with Integral Regulator bases (IC + PI) are employed to access and regulate PVA generation, while the unwanted grid current distortions are attenuated from the network using an in-loop second order integral filtering circuit algorithm. Hence, the voltage rise at the PCC is mitigated through the generation of positive reactive power to the grid from the Distribution Static Compensator (DSTATCOM), thereby regulating the phase voltage. The simulation study is carried out in a MATLAB/Simulink environment for PVA performance.

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