Modeling and Control of a Multifunctional Three-Phase Converter for Bidirectional Power Flow in Plug-In Electric Vehicles

Reza Sabzehgar,Poria Fajri,Yaser M Roshan

doi:10.3390/en13102591

Abstract

A nonlinear sliding-mode controller for a three-phase converter, utilized in plug-in electric vehicles (PEVs), is proposed in this paper. The proposed controller enables the utilized converter to perform multiple functions during different operating modes of the vehicle, i.e., grid-to-vehicle (G2V) and vehicle-to-grid (V2G) modes. The bidirectional three-phase converter and the proposed controller operate as a power factor correction circuit, bridgeless boost converter, and rectifier during G2V mode (i.e., plug-in charging), and it operates as a conventional single-stage inverter during V2G mode. The stability analysis of the proposed controller is performed by defining a proper Lyapunov function. The functionality of the proposed nonlinear controller is first evaluated through simulation studies. The feasibility and effectiveness of the proposed control strategy is then validated using an industrial control card through a hardware-in-the-loop (HIL) experimental testbed.

Highlights

Plug-in electric vehicles (PEVs) offer a promising solution to the worldwide concerns of rapid depletion of fossil fuel resources, environmental pollution, and the growing price of gasoline.large-scale integration of PEVs provides ancillary services to the grid such as balancing load and generation, supporting the grid frequency and voltage profile, and eliminating transmission congestion [1,2,3,4,5,6]
Our contribution is proposing a proper three-dimensional sliding surface to design a stable, precise, and real-time practical controller that is easier to implement with less computational burden using a simple basic three-phase power electronic circuit to be used as an integrated PEV battery charger
We present the proposed nonlinear sliding-mode control strategy, which is applied to the bidirectional three-phase single-stage converter, whose dynamic model was derived earlier in Section 2, as a PEV battery charger to facilitate both charging and discharging scenarios

Summary

Introduction

Plug-in electric vehicles (PEVs) offer a promising solution to the worldwide concerns of rapid depletion of fossil fuel resources, environmental pollution, and the growing price of gasoline. Our contribution is proposing a proper three-dimensional sliding surface to design a stable, precise, and real-time practical controller that is easier to implement with less computational burden using a simple basic three-phase power electronic circuit to be used as an integrated PEV battery charger. To find the closed form overall dynamic model of the utilized bidirectional three-phase single-stage converter for all modes of operation, (1)–(5) can be combined as. The overall dynamic model of the converter derived in Equation (7) is utilized in the proposed controller to enforce a positive or negative pseudo-resistance at the input terminals of the converter to facilitate charging or discharging modes, respectively

Nonlinear Sliding-Mode Controller

Numerical and Experimental Studies

Conclusions