Design and Implementation of a Photovoltaic Power System with Bi-Directional Inverter

A PV power system with bi-directional inverter is proposed in this paper. The system is divided into two stages, one is power stage, which contains DC/DC converter and bi-directional inverter, the other is control stage. Both stages control schemes are by a micro-controller dsPIC30F4011. For preventing from high current harmonic caused by the two stages, a predictive current control and modulation principle are designed and operated in high frequency to reduce the current harmonic. The bi-directional inverter can operate in grid-connection (GC) mode or power factor correction (PFC) mode. But the core material of inductance will result in violent current ripple change when the inductor current promoted. So, a gain modulation is used to compensate various inductances used to reduce grid-connection current ripple. Finally, the system is implemented to verify the feasibility and performance of the proposed system.

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Design and Analysis of a Photovoltaic Power System with Bi-Directional Inverter

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.9 ◽

2013 ◽

Vol 291-294 ◽

pp. 9-13

Author(s):

De Han Luo ◽

Yu En Wu ◽

Qiang Li

Keyword(s):

Power System ◽

High Frequency ◽

Current Control ◽

High Current ◽

Single Chip ◽

Current Harmonic ◽

Grid Connection ◽

Photovoltaic Power ◽

Buffer Power ◽

Analysis Design

This paper presents the analysis, design, and simulation of a photovoltaic power system with bi-directional inverter, which can be controlled with a single-chip microcontroller, such as dsPIC30F4011. The bi-directional inverter can fulfill grid connection and rectification with power factor correction to regulate the dc bus to a certain range of voltages. So, it will no need energy storage elements to buffer power. But the two stage series can cause high current harmonic, so a predictive current control and modulation principle for the bi-directional inverter is designed and operated in high frequency to reduce the current harmonic. Simulation and experimental results have illustrated the discussed features and significantly demonstrated its feasibility, reliability, and stability.

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Analysis, Modeling, and Control of Half-Bridge Current-Source Converter for Energy Management of Supercapacitor Modules in Traction Applications

Energies ◽

10.3390/en11092239 ◽

2018 ◽

Vol 11 (9) ◽

pp. 2239 ◽

Cited By ~ 5

Author(s):

Jorge Garcia ◽

Pablo Garcia ◽

Fabio Giulii Capponi ◽

Giulio De Donato

Keyword(s):

Storage System ◽

Current Source ◽

Modulation Scheme ◽

Modeling And Control ◽

Leakage Inductance ◽

Control Stage ◽

Power Stage ◽

Stage Performance ◽

And Performance ◽

And Control

In this work, an in-depth investigation was performed on the properties of the half-bridge current-source (HBCS) bidirectional direct current (DC)-to-DC converter, used to interface two DC-link voltage sources with a high-voltage-rating mismatch. The intended implementation is particularly suitable for the interfacing of a supercapacitor (SC) module and a battery stack in a hybrid storage system (HSS) for automotive applications. It is demonstrated that the use of a synchronous rectification (SR) modulation scheme benefits both the power-stage performance (in terms of efficiency and reliability) and the control-stage performance (in terms of simplicity and versatility). Furthermore, an average model of the converter, valid for every operating condition, is derived and utilized as a tool for the design of the control system. This model includes the effects of parasitic elements (mainly the leakage inductance of the transformer) and of the converter snubbers. A 3 kW prototype of the converter was used for experimental validation of the converter modeling, design, and performance. Finally, a discussion on the control strategy of the converter operation is included.

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A Novel Dynamic Three-Level Tracking Controller for Mobile Robots Considering Actuators and Power Stage Subsystems: Experimental Assessment

Sensors ◽

10.3390/s20174959 ◽

2020 ◽

Vol 20 (17) ◽

pp. 4959

Author(s):

José Rafael García-Sánchez ◽

Salvador Tavera-Mosqueda ◽

Ramón Silva-Ortigoza ◽

Victor Manuel Hernández-Guzmán ◽

Magdalena Marciano-Melchor ◽

...

Keyword(s):

Dynamic Control ◽

Current Control ◽

Mechanical Structure ◽

Dc Motors ◽

Tracking Controller ◽

Medium Level ◽

Power Stage ◽

Feasibility Robustness ◽

And Performance ◽

High Level

In order to solve the trajectory tracking task in a wheeled mobile robot (WMR), a dynamic three-level controller is presented in this paper. The controller considers the mechanical structure, actuators, and power stage subsystems. Such a controller is designed as follows: At the high level is a dynamic control for the WMR (differential drive type). At the medium level is a PI current control for the actuators (DC motors). Lastly, at the low level is a differential flatness-based control for the power stage (DC/DC Buck power converters). The feasibility, robustness, and performance in closed-loop of the proposed controller are validated on a DDWMR prototype through Matlab-Simulink, the real-time interface ControlDesk, and a DS1104 board. The obtained results are experimentally assessed with a hierarchical tracking controller, recently reported in literature, that was also designed on the basis of the mechanical structure, actuators, and power stage subsystems. Although both controllers are robust when parametric disturbances are taken into account, the dynamic three-level tracking controller presented in this paper is better than the hierarchical tracking controller reported in literature.

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Research of the Structure and Control Strategy for Wind-Solar Hybrid Power System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.385-386.911 ◽

2013 ◽

Vol 385-386 ◽

pp. 911-914

Author(s):

Ju Yuan Jiang ◽

Wei Da Yang ◽

Nai Tan Lin

Keyword(s):

Control System ◽

Power System ◽

Control Strategy ◽

Hybrid Power System ◽

Hybrid Power ◽

Grid Connection ◽

Remote Terminal ◽

World Energy ◽

Remote Terminal Unit ◽

Two Stages

Under the background of growing world energy shortage people start to realize the potentiality of renewable resources. Wind-solar hybrid power system as its stability and economy is with widespread use now. This paper according to the character of wind power and photovoltaic power generation, briefly introduces the wind-solar hybrid power system, shows the design of a remote control system based on the remote terminal unit (RTU). The control strategy of battery charging and grid-connection is carried out. There are two stages of control system which include sensors RTU communication network and terminal pc. The result of the study can be used to guide the research of this type of wind-solar hybrid power system.

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