scholarly journals Resonance Instability of Photovoltaic E-Bike Charging Stations: Control Parameters Analysis, Modeling and Experiment

2019 ◽  
Vol 9 (2) ◽  
pp. 252 ◽  
Author(s):  
Ziqian Zhang ◽  
Cihan Gercek ◽  
Herwig Renner ◽  
Angèle Reinders ◽  
Lothar Fickert
Keyword(s):  
Major Effect ◽  
Current Control ◽  
Current Loop ◽  
Control Methods ◽  
Control Parameters ◽  
Charging System ◽  
Grid Connected Inverter ◽  
The Time Domain ◽  
Charging Stations ◽  
And Control

This article presents an in-situ comparative analysis and power quality tests of a newly developed photovoltaic charging system for e-bikes. The various control methods of the inverter are modeled and a single-phase grid-connected inverter is tested under different conditions. Models are constituted for two current control methods; the proportional resonance and the synchronous rotating frames. In order to determine the influence of the control parameters, the system is analyzed analytically in the time domain as well as in the frequency domain by simulation. The tests indicated the resonance instability of the photovoltaic inverter. The passivity impedance-based stability criterion is applied in order to analyze the phenomenon of resonance instability. In conclusion, the phase-locked loop (PLL) bandwidth and control parameters of the current loop have a major effect on the output admittance of the inverter, which should be adjusted to make the system stable.

Operation of Microgrid and Control Strategies

2019 ◽  
pp. 434-449
Author(s):  
Suma Deepthi Veeraganti ◽  
Ramchandra Nittala
Keyword(s):  
Electric Power ◽  
Rural Areas ◽  
Control Strategies ◽  
Electric Power Industry ◽  
Power Industry ◽  
Current Control ◽  
Frequency Regulation ◽  
Control Methods ◽  
Islanded Mode ◽  
And Control

Microgrids are the most innovative area in the electric power industry today. A microgrid can operate in grid-connected or islanded mode. In islanded mode, microgrids can provide electricity to the rural areas with lower cost and minimum power losses. Several methods have been proposed in the literature for the successful operation of a microgrid. This chapter presents an overview of the major challenges and their possible solutions for planning, operation, and control of islanded operation of a microgrid. Microgrids are the most innovative area in the electric power industry today. Moreover, microgrids provide local voltage and frequency regulation support and improve reliability and power capacity of the grid. The most popular among the control strategies based on droop characteristics, in addition a central controller is described within a hierarchical control scheme to optimize the operation of the microgrid during interconnected operation. Microgrid control methods, including PQ control, droop control, voltage/frequency control, and current control methods are formulated.

Operation of Microgrid and Control Strategies

2022 ◽  
pp. 111-126
Author(s):  
Suma Deepthi Veeraganti ◽  
Ramchandra Nittala
Keyword(s):  
Electric Power ◽  
Rural Areas ◽  
Control Strategies ◽  
Electric Power Industry ◽  
Power Industry ◽  
Current Control ◽  
Frequency Regulation ◽  
Control Methods ◽  
Islanded Mode ◽  
And Control

Microgrids are the most innovative area in the electric power industry today. A microgrid can operate in grid-connected or islanded mode. In islanded mode, microgrids can provide electricity to the rural areas with lower cost and minimum power losses. Several methods have been proposed in the literature for the successful operation of a microgrid. This chapter presents an overview of the major challenges and their possible solutions for planning, operation, and control of islanded operation of a microgrid. Microgrids are the most innovative area in the electric power industry today. Moreover, microgrids provide local voltage and frequency regulation support and improve reliability and power capacity of the grid. The most popular among the control strategies based on droop characteristics, in addition a central controller is described within a hierarchical control scheme to optimize the operation of the microgrid during interconnected operation. Microgrid control methods, including PQ control, droop control, voltage/frequency control, and current control methods are formulated.

Analysis on Single Photovoltaic Grid-Connected Inverter Control System

2013 ◽  
Vol 416-417 ◽  
pp. 461-467
Author(s):  
Hong Fei Liao ◽  
Qi Feng Liang
Keyword(s):  
Control System ◽  
Transfer Functions ◽  
Power Grid ◽  
Current Control ◽  
Control Mode ◽  
Current Loop ◽  
Pi Regulator ◽  
Photovoltaic Array ◽  
High Power Factor ◽  
Grid Connected Inverter

nverter can operate with power grid in parallel and can return the electricity generated by photovoltaic array with high power factor to power grid. The paper analyzes and compares several grid-connected current control methods, determines that the current control mode used in the design is improved SPWM current virtual value tracking control technology. And the paper analyzes and studies the transfer functions of key links of the inverter, and gives the derivation process of transfer functions. The control system uses dual-loop structure of inner current loop and outer voltage loop, and proposes the design methods of voltage loop and current loop PI regulator.

The Research of Two Staged Non-Isolated Photovoltaic Grid Connected Inverter Control Method

2013 ◽  
Vol 773 ◽  
pp. 139-142
Author(s):  
Jia Guo ◽  
Zhi Gang Li ◽  
Ya Ping Cheng ◽  
Chun Yan Cui
Keyword(s):  
Control Method ◽  
Current Control ◽  
Power Devices ◽  
Grid Current ◽  
Pv Systems ◽  
Sampled Signal ◽  
Bus Voltage ◽  
Grid Connected Inverter ◽  
And Control ◽  
Pv Grid

Grid-connected inverter topologies and control methods are analyzed and compared on the basis of two non-isolated PV grid-connected inverter circuit topology as 3kVA grid connected PV systems. In this paper, the current control method, the DC bus voltage outer grid current inner loop of the dual closed-loop PI control method. Sampled signal through the system circuit for processing, resulting in a SPWM drive signal to control the conduction of the power devices off the grid current control.

scholarly journals ANALYSIS OF HEXAPOD ROBOT LOCOMOTION

2010 ◽  
Vol 2 (1) ◽  
pp. 36-39 ◽  
Author(s):  
Tomas Luneckas
Keyword(s):  
Inverse Kinematics ◽  
Robot Control ◽  
Control Method ◽  
Servo Control ◽  
Control Methods ◽  
Control Parameters ◽  
Hexapod Robot ◽  
Robot Locomotion ◽  
Tripod Gait ◽  
And Control

Hexapod robot locomotion is analyzed. Trajectory forming method for one leg is introduced. Servo angles are expressed using geometric inverse kinematics method. Forming of tripod gait is described and a diagram representing it is presented. Servo control parameters are defined to ensure fluent and versatile robot control. Several servo control methods are presented. After testing robot movement using different servo control methods, gait generation is corrected and control method that meets servo control parameters is chosen.

scholarly journals Modeling and Control Parameters Design for Grid-Connected Inverter System Considering the Effect of PLL and Grid Impedance

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 40474-40484 ◽  
Author(s):  
Zhiwei Xie ◽  
Yandong Chen ◽  
Wenhua Wu ◽  
Yuancan Xu ◽  
Haining Wang ◽  
...  
Keyword(s):  
Control Parameters ◽  
Modeling And Control ◽  
Grid Impedance ◽  
Grid Connected Inverter ◽  
And Control

Probability model for control parameters in the aircraft's information and control systems

2018 ◽  
Vol 2 ◽  
pp. 9-16
Author(s):  
A. Al-Ammouri ◽  
◽  
H.A. Al-Ammori ◽  
A.E. Klochan ◽  
A.M. Al-Akhmad ◽  
...  
Keyword(s):  
Control Systems ◽  
Probability Model ◽  
Control Parameters ◽  
And Control
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