A Two-Stage Three-Phase Integrated Charger for Electric Vehicles With Dual Cascaded Control Strategy

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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Research on Two-Stage Three-Phase Photovoltaic Grid-Connected System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.1247 ◽

2012 ◽

Vol 535-537 ◽

pp. 1247-1251

Author(s):

Xiao Jie Zhou ◽

Yi Ruan

Keyword(s):

Vector Control ◽

Control Strategy ◽

Common Point ◽

Theoretic Analysis ◽

Two Stage ◽

Pv Systems ◽

Current Vector ◽

Three Phase ◽

Pi Controllers ◽

The Common

Nowadays the penetration of PV-generated power energy into the utility grid is increasing exponentially. This paper focuses on two-stage three-phase grid-connected PV systems, which includes modeling of three-phase grid-connected PV systems, grid-connected control strategy of inverter. The inverter based on the grid-voltage oriented vector control used SVPWM-based synchronous current vector PI controllers to control the grid-current of the common point in three-phase grid-connected system. Theoretic analysis and experimental results on a 2.5KW prototype verify the presented algorithm.

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Improved Control Strategy for Three-Phase Microgrid Management with Electric Vehicles Using Multi Objective Optimization Algorithm

Energies ◽

10.3390/en14041146 ◽

2021 ◽

Vol 14 (4) ◽

pp. 1146

Author(s):

Muhammad Shahab ◽

Shaorong Wang ◽

Abdul Khalique Junejo

Keyword(s):

Low Power ◽

Electric Vehicles ◽

Power Factor ◽

Control Strategy ◽

Ancillary Services ◽

Dynamic Programming Method ◽

High Peak Power ◽

Multi Objective Optimization ◽

Multi Objective ◽

Three Phase

The usage of electric vehicles (EV) have been spreading worldwide, not only as an alternative to achieve a low-carbon future but also to provide ancillary services to improve the power system reliability. A common problem encountered in the existing alternating current (AC) grids is low power factor, which cause several power quality problems and has worsened with the growing application of distributed generation (DG). Therefore, considering the spread of EVs usage for ancillary services and the low power factor issue in current electrical grids, this paper proposes an improved control strategy for power factor correction of a three-phase microgrid management composed of a photovoltaic (PV) array, dynamic loads, and an EV parking lot. This control strategy aims to support power factor issues using the EV charging stations, allowing the full PV generation. Different operation modes are proposed to fulfill the microgrid and the EV users’ requirements, characterizing a Multi Objective Optimization (MOO) approach. In order to achieve these optimization requests, a dynamic programming method is used to charge the vehicle while adjusting the microgrid power factor. The proposed control algorithm is verified in different scenarios, and its results indicate a suitable performance for the microgrid even during conditions of overload and high peak power surplus in generation unit. The microgrid power factor remains above the desired reference during the entire analyzed period, in which the error is approximately 4.5 less than the system without vehicles, as well as obtains an energy price reduction.

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A Three-Phase Bidirectional Grid-Connected AC/DC Converter for V2G Applications

Journal of Control Science and Engineering ◽

10.1155/2020/8844073 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Jingang Han ◽

Xiong Zhou ◽

Song Lu ◽

Pinxuan Zhao

Keyword(s):

Electric Vehicles ◽

Control Strategy ◽

Power Flow ◽

Reactive Power ◽

Vehicle To Grid ◽

Experiment Platform ◽

Three Phase ◽

Simulation And Experiment ◽

Bidirectional Power Flow ◽

The Mathematical Model

The smart grid and electric vehicles (EVs) are widely used all over the world. As the key role, the Vehicle-to-Grid (V2G) has been attracting increasing attention. The bidirectional grid-connected AC/DC converter is one of the indispensable parts in the V2G system, which can realize bidirectional power flow and meet the power quality requirements for grid. A three-phase bidirectional grid-connected AC/DC converter is presented in this paper for V2G systems. It can be used to achieve the bidirectional power flow between EVs and grid, supply reactive power compensation, and smooth the power grid fluctuation. Firstly, the configuration of V2G systems is introduced, and the mathematical model of the AC/DC converter is built. Then, for bidirectional AC/DC converters, the grid voltage feedforward decoupling scheme is applied, and the analysis of PI control strategy is proposed and the controller is designed. The system simulation model is established based on MATLAB/Simulink, and the experiment platform of the bidirectional grid-connected converter for V2G is designed in lab. The simulation and experiment results are shown, and the results evaluate the effectiveness of the model and the performance of the applied control strategy.

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