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Large-scale electric vehicle trunking system based on MMC and control method thereof

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

Active Publication Date: 2016-03-30
HEFEI UNIV OF TECH
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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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  • Large-scale electric vehicle trunking system based on MMC and control method thereof
  • Large-scale electric vehicle trunking system based on MMC and control method thereof
  • Large-scale electric vehicle trunking system based on MMC and control method thereof

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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 trunking system based on MMC and a control method thereof. The large-scale electric vehicle trunking system is characterized in that three phase elements composed of an electric reactor, an H-bridge module and a sub-module are connected to an alternating current power grid through an LC filter to form a topological structure of the large-scale electric vehicle trunking system based on MMC, virtual electrical charge states are calculated through the initial electrical charge state, user set standing time and expected electrical charge state of each electric vehicle, the sub-module of the electric vehicle corresponding to a driving signal generated by each carrier signal is determined according to the ranking of the virtual electrical charge states, the differentiation control for electric vehicle charging and discharging power connected to the sub-modules according to user requirements is realized, and the control for three-phase power balance and unit power factors on a power grid side is realized. The system is high in integration degree, high in modularization degree, high in efficiency, little in harmonic distortion, low in switching loss and high in fault-tolerant capacity, and independent control for the sub-modules in each-phase bridge arms can be realized.

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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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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