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MMC-based large-scale electric vehicle cluster system and its control method

A technology of electric vehicles and cluster systems, applied in the direction of electric vehicles, electric vehicle charging technology, power network operating system integration, etc., can solve problems such as reducing system auxiliary service capabilities

Active Publication Date: 2018-02-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When electric vehicles are assembled on a large scale, users in the cluster system may reduce the auxiliary service capability of the system in order to meet their own needs, and even lead to the phenomenon of "peak on top"

Method used

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  • MMC-based large-scale electric vehicle cluster system and its control method
  • MMC-based large-scale electric vehicle cluster system and its control method
  • MMC-based large-scale electric vehicle cluster system and its control method

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Experimental program
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Embodiment Construction

[0057] see figure 1 , the structural form of the large-scale electric vehicle cluster system based on MMC in this embodiment is: three phase units are respectively connected to the AC side power grid through the LC filter, the phase unit is composed of two upper and lower bridge arm units, and the bridge arm unit is composed of a A reactor La, an H-bridge module and n identical sub-modules are connected in series; see Figure 1a In this embodiment, the H-bridge module is composed of four fully-controlled power devices SH1, SH2, SH3, SH4 with anti-parallel diodes and a capacitor C, wherein the collector phases of the fully-controlled power device SH1 and the fully-controlled power device SH2 Connected to the positive pole of the DC power supply, the emitters of the fully controlled power device SH3 and the fully controlled power device SH4 are connected to the negative pole of the DC power supply, the emitter of the fully controlled power device SH1 is connected to the collecto...

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Abstract

The invention discloses a large-scale electric vehicle cluster system based on MMC and its control method. The topology structure of the large-scale electric vehicle cluster system, calculate the virtual state of charge through the initial state of charge of each electric vehicle, the user-set dwell time and the expected state of charge, and determine the driving signal drive generated by each carrier signal according to the virtual state of charge sorting The sub-module where the corresponding electric vehicle is located realizes the differential control of the charging and discharging power of the electric vehicle connected to the sub-module according to user needs, and realizes three-phase power balance and unit power factor control on the grid side. The invention has high integration degree, high modularization degree, high efficiency, small harmonic distortion, low switching loss, strong fault tolerance capability, and independent control of the sub-modules in each phase bridge arm.

Description

technical field [0001] The present invention relates to the field of electric vehicle clusters, and is applied to large-scale electric vehicle charging stations, realization of electric vehicle to grid (Vehicle-to-grid, V2G), etc., and specifically relates to a large-scale electric vehicle cluster based on MMC system and its control method. Background technique [0002] Due to the zero-pollution characteristics of electric vehicles (Electric Vehicle, EV), it is predicted that electric vehicles will develop on a large scale in the next ten years. The large-scale connection of electric vehicles to the power grid will bring a series of negative impacts on the traditional power grid, such as increasing the peak load of the distributed network, increasing the uncertainty of the power flow of the power grid, increasing the harmonic pollution of the power grid, and affecting the dispatching plan of distributed power generation. Therefore, it is of great practical significance to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/14H02J3/26H02J7/00B60L11/18
CPCH02J7/0027H02J3/14H02J3/26B60L53/63B60L55/00Y02E40/50Y04S20/222Y04S30/12Y04S30/14Y02B70/3225Y02T10/70Y02T90/167Y02T90/12Y02T10/7072
Inventor 茆美琴陶庭欢张榴晨
Owner HEFEI UNIV OF TECH
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