scholarly journals Investigations on Hysteresis-Based Current Control Techniques for Grid Connected Photovoltaic Systems

2014 ◽  
Vol 12 (1) ◽  
pp. 32
Author(s):  
V. Rajini
Keyword(s):  
Control Strategy ◽  
Power Grid ◽  
Line Length ◽  
Current Control ◽  
Pv System ◽  
Control Techniques ◽  
Hysteresis Current Control ◽  
Performance Qualification ◽  
Effective Performance ◽  
Hysteresis Control

This paper focuses on delivering an effective performance qualification (PQ) control strategy for a grid connected photovoltaic (PV) system. A PV-based distributed generation system with a capacity of 10 kilo volt amps (kVA) was connected to the utility side of a power grid operating at 415 V. The power grid was modelled with a capacity of 100 kVA, 11 kV, and 100 km transmission line length. The PQ control strategy was implemented with three hysteresis-based current control techniques. To overcome the drawbacks of conventional hysteresis-control techniques, adaptive tuning of the hysteresis band was carried out, and a vector-based hysteresis current control is proposed to improve the results. 

Implementation of a New Hysteresis Control Strategy for Autonomous Parallel Active Filter

2005 ◽  
Vol 4 (1) ◽  
Author(s):  
Tarak Benslimane ◽  
Kamel Aliouane ◽  
Boukhmis Chetate
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Active Filter ◽  
Current Control ◽  
Dc Voltage ◽  
Hysteresis Current Control ◽  
Harmonic Currents ◽  
Data Acquisition Board ◽  
Hysteresis Control

The goal of this paper is to evaluate performances of a new hysteresis current control strategy for autonomous three phase parallel active filter in harmonic currents elimination (by simulation an experiment) as well as the reactive power compensation (by simulation). This strategy, called the Optimized Hysteresis Control Strategy, is based on currents errors and their derivatives calculation each time the zero voltage vector is set at the AC side of the inverter of the active filter. The harmonic currents are identified using the method of the instantaneous real and imaginary powers. A voltage regulation loop is used to regulate the condenser DC voltage which ensure a constant DC voltage to the inverter. A digital software C++ simulation program was developed and implemented via the data acquisition board (AT-MIO-16X DAQ from National Instruments). Simulation and experimental results are presented.

The Simulation Study of Permanent Magnet Synchronous Motor and its Hysteresis Current Control Based on AMESim

2014 ◽  
Vol 700 ◽  
pp. 678-681
Author(s):  
Yu Lan Li ◽  
Tie Zhu Zhang ◽  
Hong Zhao ◽  
Ji Zhang
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Current Control ◽  
Impedance Matrix ◽  
Hysteresis Current Control ◽  
Advantages And Disadvantages ◽  
The Mathematical Model ◽  
Motor Model

The paper gives a brief introduction of the permanent magnet synchronous motor (PMSM). The author gives the mathematical model under the simplified conditions and the PMSM rotor and stator impedance matrix. Besides, the author used AMESim to build a synchronous motor model on the basic of hysteresis current control strategy and set the parameters. A simulation was carried out and advantages and disadvantages of hysteresis current control strategy were analyzed.

Performance Evaluation of Current Control Techniques for Grid Connected PV System under Unbalanced Grid Faults

2021 ◽  
Author(s):  
Jyoti Joshi ◽  
Anurag Kumar Swami ◽  
Somesh Bhattacharya ◽  
Vibhu Jately ◽  
Brian Azzopardi
Keyword(s):  
Performance Evaluation ◽  
Current Control ◽  
Pv System ◽  
Control Techniques ◽  
Unbalanced Grid

Study of a Current Control Strategy Based on Multisampling for High-Power Grid-Connected Inverters With an LCL filter

2017 ◽  
Vol 32 (7) ◽  
pp. 5023-5034 ◽  
Author(s):  
Xing Zhang ◽  
Peng Chen ◽  
Changzhou Yu ◽  
Fei Li ◽  
Hieu Thanh Do ◽  
...  
Keyword(s):  
High Power ◽  
Control Strategy ◽  
Power Grid ◽  
Current Control ◽  
Lcl Filter ◽  
A Current

scholarly journals Power Quality Enhancement in Grid Connected PV Systems using High Step Up DC-DC Converter

2017 ◽  
Vol 7 (2) ◽  
pp. 720
Author(s):  
V S Prasadarao K ◽  
K V Krishna Rao ◽  
P Bala Koteswara Rao ◽  
T. Abishai
Keyword(s):  
Power Quality ◽  
Fossil Fuels ◽  
Reactive Power ◽  
Neutral Current ◽  
Renewable Energy Sources ◽  
Current Control ◽  
Control Technique ◽  
Pv System ◽  
Hysteresis Current Control ◽  
Switching Losses

Renewable energy sources (RES) are gaining more importance in the present scenario due to the depletion of fossil fuels and increasing power demand. Solar energy is the one of the most promising as it is clean and easily available source. The voltage obtained from the PV system is low. This voltage is increased by high step up dc-dc converter which uses only one switch leads to low switching losses and hence the efficiency of this converter is high. To get the good response this converter is operated in closed loop manner. Integration of PV system with existing grid has so many issues like distorted voltage, current and reactive power control etc. This paper presents a four leg inverter which works on hysteresis current control technique to address the power quality issues like reactive power compensation, balanced load currents and compensation of neutral current. The switching to the inverter is designed in such a way that it supplies the extra current to stabilise the current of the grid that is being supplied to the loads. Finally, the proposed technique is validated by using mat lab/Simulink software and corresponding results are presented in this paper.

Dynamic Simulation of a Microgrid with Renewable Microsources Based on DIgSILENT/PowerFactory

2013 ◽  
Vol 805-806 ◽  
pp. 1176-1180 ◽  
Author(s):  
Min Wang ◽  
Yong Qing Li ◽  
Cheng Fei Zhang ◽  
Dong Yang Cai ◽  
Yue Yuan
Keyword(s):  
Control Strategy ◽  
Power Grid ◽  
Storage System ◽  
Energy Storage System ◽  
Operating Characteristics ◽  
Pv System ◽  
Distributed Generations ◽  
Speed Fluctuation ◽  
Dynamic Operating ◽  
Mode 3

According to characteristics of the power grid in China, a framework of microgrid for distributed generations (DGs) integration is proposed. To ensure the reliability of power supply, the framework access distribution network by single-bus section. The DGs consist of photovoltaic (PV) system, wind power system and energy storage system. Based on the proposed framework and control strategy, the models of distributed generations were built in DIgSILENT/PowerFactory. According to the control strategy, three cases were analyzed: 1) the dynamic operating characteristics of the microgrid from grid-connected mode to isolated mode; 2) the dynamic operating characteristics of the microgrid with wind speed fluctuation disturbance in grid-connected mode and islanded mode; 3) the influence to microgrid operation in different fault types and locations. The simulation results show that the proposed framework of microgrid conforms to Chinas power grid feature and the control strategy can ensure safety and reliable operation under different situation.

A Mathematical Model and Performance Evaluation for a Single-Stage Grid-Connected Photovoltaic (PV) System

2008 ◽  
Vol 9 (6) ◽  
Author(s):  
Prajna Paramita Dash ◽  
Amirnaser Yazdani
Keyword(s):  
Mathematical Model ◽  
Control Strategy ◽  
Voltage Control ◽  
Current Control ◽  
Operating Conditions ◽  
Single Stage ◽  
Control Loop ◽  
Pv System ◽  
Wide Range ◽  
The Impact

This paper proposes a control strategy for important transients of a single-stage, three-phase, PV system that is connected to a distribution network. The proposed control strategy adopts an inner current-control loop and an outer DC-link voltage control loop. The current-control mechanism renders the PV system protected against external faults, enables control of the DC-link voltage and, therefore, controls/maximizes the PV system power output. The paper also proposes a feed-forward compensation strategy for the DC-link voltage control loop to mitigate the impact of the nonlinear characteristic of the PV array on the closed-loop stability, and to permit design and optimization of the DC-link voltage controller for a wide range of operating conditions. A mathematical model and a control design methodology are presented for the PV system, and it is shown that under the proposed control, the PV system fulfills the operational requirements of a grid-connected PV system. The effectiveness of the proposed control strategy and the most important transients of the PV system are evaluated through simulation studies conducted on a detailed switched model of the PV system in the PSCAD/EMTDC software environment.

scholarly journals Hysteresis control for a grid connected dual-buck inverter

2020 ◽  
Vol 20 (1) ◽  
pp. 1-10
Author(s):  
Mario Andrés Bolaños-Navarrete ◽  
Juan David Bastidas-Rodríguez ◽  
Gustavo Adolfo Osorio
Keyword(s):  
Single Phase ◽  
Current Control ◽  
State Variables ◽  
Dead Band ◽  
Hysteresis Current Control ◽  
Energy Applications ◽  
Power Injection ◽  
The Dead ◽  
Error Dynamics ◽  
Hysteresis Control

Single-phase inverters are widely used in different renewable energy applications. Although the full-bridge inverter istypically used, dual-buck inverters provide an important advantage, since they eliminate the shoot-through problems. However, solutions proposed in the literature require additional inductors, use linear controllersdesigned around an operation point, or cannot be used in grid-connected applications. This paper presents a hysteresis current control of a single-phase dual-buck full-bridge inverter for grid-connected active power injection. Includes the dynamical modelin state variables, as well as analytical conditions to guarantee the evolution of the error dynamics in a set with boundaries defined by the designer. Moreover, the paper provides guidelines for the design of the dead band required for the transitions between the positive and negative semi-cycles (and vice-versa) of the grid voltage. Finally, simulation results validate the main features of the controller as well as the design of the dead band

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