Study on Single-Phase Grid-Connected Inverter Based on PI Control

One of the most important parts in the energy feedback electronic loads is the grid-connected inverter, and its function is to feed the detected electrical energy back to the grid for saving energy. In this paper, the principe of the grid-connected inverter is elaborated, then the PI control and the LCL filter are selected, the mathematical model was set up and the feed forward control voltage was added that suppressing the influence on the system produced by the grid disturbance. The simulation was conducted with the help of Matlab/Simulink, from the simulation waveforms it can be seen that the system dynamic and static performance was good, meanwhile electrical energy can be fed to the grid in the way of unit power factor, eventually the feasibility and superiority of the designing scheme is confirmed.

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Applying Kalman filter on sensor noise cancelation in grid – connected inverter

Science and Technology Development Journal ◽

10.32508/stdj.v18i3.901 ◽

2015 ◽

Vol 18 (3) ◽

pp. 192-198

Author(s):

Huy Minh Nguyen ◽

Phuong Minh Le ◽

Phuong Thanh Ho

Keyword(s):

Kalman Filter ◽

Control Strategy ◽

Electrical Power ◽

Control Model ◽

Two Stage ◽

Three Phase ◽

Grid Connected Inverter ◽

Set Up ◽

The Mathematical Model

This paper presents the control model of three phase grid- connected photovoltaic inverter based on the analysis of operating principle of two-stage conventional gridconnected inverter. The mathematical model of inverter under dq frame is set up and the overall control strategy of two-stage photovoltaic grid-connected inverter is proposed in this paper. To overcome the distortion general caused by switching effect on sensors, a Kalman filter is introduced. The control strategy was simulated on Matlab – Simulink to verify the steady and dynamic of model, improving the quality of electrical power to consumers.

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New feed-forward control strategy of single-phase grid-connected inverter

Journal of Physics Conference Series ◽

10.1088/1742-6596/1871/1/012029 ◽

2021 ◽

Vol 1871 (1) ◽

pp. 012029

Author(s):

Ziheng Cao ◽

Shaoping Zhou ◽

Di Wu

Keyword(s):

Control Strategy ◽

Single Phase ◽

Feed Forward ◽

Feed Forward Control ◽

Grid Connected Inverter

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Harmonic Suppression Strategy of Photovoltaic Grid Connected Inverter Based on Repetitive and PI Control

Journal of Physics Conference Series ◽

10.1088/1742-6596/2136/1/012032 ◽

2021 ◽

Vol 2136 (1) ◽

pp. 012032

Author(s):

Shengqing Li ◽

Wang Han ◽

Xiaobao Li ◽

Zhijian Wang

Keyword(s):

Dynamic Performance ◽

Pi Control ◽

Harmonic Suppression ◽

Current Feedback ◽

Current Harmonics ◽

Current Controller ◽

Grid Connected Inverter ◽

The Mathematical Model ◽

Suppression Strategy ◽

Harmonic Problem

Abstract To address the serious harmonic problem of grid connected current in photovoltaic grid-connected inverter, a harmonic suppression strategy based on Repetitive and PI control is proposed in this thesis. According to this strategy, the mathematical model of LCL photovoltaic grid-connected inverter is established with the harmonic mechanism analyzed, the repetitive and PI control is added into the current controller, and the capacitive-current feedback is added to enhance the system damping. Furthermore, it puts PI control on the inner loop and the repetitive control on the outer loop to improve the dynamic performance and achieve the harmonic suppression of the system. Moreover, the simulation results show that this method improves the dynamic response ability of the system, and effectively suppress the grid-connected current harmonics as THD of grid-connected current is 19.65% lower than that of PI controller.

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EXPERIMENTAL STUDIES OF CAR PROPERTIES ON A PHYSICAL MODEL

Avtoshliakhovyk Ukrayiny ◽

10.33868/0365-8392-2019-4-260-10-16 ◽

2019 ◽

pp. 10-16

Author(s):

Oleksii Timkov ◽

Dmytro Yashchenko ◽

Volodymyr Bosenko

Keyword(s):

Mathematical Model ◽

Remote Control ◽

Physical Model ◽

Model Experiment ◽

Experimental Studies ◽

Electrical Energy ◽

Short Term ◽

Motor Current ◽

Memory Card ◽

The Mathematical Model

The article deals with the development of a physical model of a car equipped with measuring, recording and remote control equipment for experimental study of car properties. A detailed description of the design of the physical model and of the electronic modules used is given, links to application libraries and the code of the first part of the program for remote control of the model are given. Atmega microcontroller on the Arduino Uno platform was used to manage the model and register the parameters. When moving the car on the memory card saved such parameters as speed, voltage on the motor, current on the motor, the angle of the steered wheel, acceleration along three coordinate axes are recorded. Use of more powerful microcontrollers will allow to expand the list of the registered parameters of movement of the car. It is possible to measure the forces acting on the elements of the car and other parameters. In the future, it is planned to develop a mathematical model of motion of the car and check its adequacy in conducting experimental studies on maneuverability on the physical model. In addition, it is possible to conduct studies of stability and consumption of electrical energy. The physical model allows to quickly change geometric dimensions and mass parameters. In the study of highway trains, this approach will allow to investigate the various layout schemes of highway trains in the short term. It is possible to make two-axle road trains and saddle towed trains, three-way hitched trains of different layout. The results obtained will allow us to improve not only the mathematical model, but also the experimental physical model, and move on to further study the properties of hybrid road trains with an active trailer link. This approach allows to reduce material and time costs when researching the properties of cars and road trains. Keywords: car, physical model, experiment, road trains, sensor, remote control, maneuverability, stability.

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DC to Single-Phase AC Grid Connected Inverter with Boost Type Active Buffer Circuit Operated in Discontinuous Current Mode

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.138.453 ◽

2018 ◽

Vol 138 (5) ◽

pp. 453-462

Author(s):

Jun-ichi Itoh ◽

Tomokazu Sakuraba ◽

Hoai Nam Le ◽

Hiroki Watanabe ◽

Keisuke Kusaka

Keyword(s):

Single Phase ◽

Current Mode ◽

Grid Connected Inverter

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Research on Dynamic Balance Method of Precision Centrifuge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.945-949.777 ◽

2014 ◽

Vol 945-949 ◽

pp. 777-780

Author(s):

Tao Liu ◽

Yong Xu ◽

Bo Yuan Mao

Keyword(s):

Mathematical Model ◽

Balance Control ◽

Dynamic Balance ◽

Dynamic Balancing ◽

Structure Characteristics ◽

Balance System ◽

Simulation Results ◽

Set Up ◽

System Controller ◽

The Mathematical Model

Firstly, according to the structure characteristics of precision centrifuge, the mathematical model of its dynamic balancing system was set up, and the dynamic balancing scheme of double test surfaces, double emendation surfaces were established. Then the dynamic balance system controller of precision centrifuge was designed. Simulation results show that the controller designed can completely meet the requirements of precision centrifuge dynamic balance control system.

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