Control Research on Multi-Functional EV Module Charging/Discharging System

doi:10.3969/j.issn.1000-7229.2015.07.024

Abstract

Abstract:

In view of the increased demand of EV batteries as well as the performance requirement of charging device， a multi-functional modular （dis）charging system for EV batteries was proposed. On this basis， the control technology of the module which consisted of a three-phase AC/DC converter and an isolated dual-active-bridge DC/DC converter was studied. A coordinated optimization control was proposed for two-stages converters to improve the energy transfer efficiency and power density of （dis）charging module. Then， a detailed analysis was presented to discuss the condition of eliminating back-flow power of DC/DC converter under double phase-shift control， and the conclusion was verified through the simulation of power battery’s charging and discharging process. Furthermore， a new power feed-forward compensation of charging/discharging motor load was introduced in DC bus voltage control to improve both the dynamic and static performance. Finally， the superiority of the proposed control strategy was verified through the simulation.

Key words: modular （dis）charging system, double phase-shift control, back-flow power, power feed-forward compensation

CLC Number:

TM 910.6

HUANG Shuai， JIANG Daozhuo， GU Hongjie， LIANG Yiqiao， YING Qunmin. Control Research on Multi-Functional EV Module Charging/Discharging System[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(7): 167-174.

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