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v2g bidirectional AC-DC conversion converter

A technology of AC-DC conversion and converter, which is applied in the direction of converting AC power input into DC power output, output power conversion devices, electrical components, etc., and can solve the problem of affecting the working efficiency of V2G AC-DC hybrid microgrid, and cannot switch back and forth, etc. problem, to achieve the effect of overload and overcurrent protection, small start-up impact and high reliability

Active Publication Date: 2019-06-25
BEIJING BEIBIAN MICRO GRID TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The traditional AC-DC conversion converter cannot switch back and forth between the two working modes of isolated grid operation and grid-connected operation, and can only realize the setting of active power or reactive power, so the traditional AC-DC conversion converter is used Will affect the working efficiency of V2G AC-DC hybrid microgrid

Method used

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Embodiment Construction

[0034] see Figure 1 to Figure 2 , the invention discloses a V2G bidirectional AC-DC conversion converter, including a working circuit, a signal acquisition circuit and a control circuit for controlling the working state of the working circuit, the control circuit is connected to the signal acquisition circuit in communication, and the A microprocessor is provided in the control circuit, and the microprocessor is connected to the three-phase bridge inverter circuit through a PWM driving circuit.

[0035] The working circuit includes a three-phase bridge inverter circuit 5 connected to the DC bus, an isolation transformer 7 connected to the AC bus, and a filter circuit 6 arranged between the three-phase bridge inverter circuit and the isolation transformer .

[0036] The three-phase bridge inverter circuit is the core of the working circuit, and its modulation ratio is exactly the modulation ratio of the three-phase bridge inverter circuit. When it is in the inverter state, th...

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Abstract

The invention relates to a V2G two-way alternating-current and direct-current switching converter which comprises a work circuit, a signal acquisition circuit and a control circuit. The work circuit comprises a three-phase bridge inverter circuit connected with a direct-current bus, an isolation transformer connected with an alternating-current bus and a filter circuit arranged between the three-phase bridge inverter circuit and the isolation transformer. A microprocessor is connected with the inverter circuit through a PWM drive circuit. The control circuit is connected with the signal acquisition circuit, different control modes are set according to different running modes of an alternating-current and direct-current hybrid microgrid, and the control modes include a V-f control mode and a P-Q decoupling control mode. Two-way alternating-current and direct-current energy conversion in the microgrid is achieved through a reasonable structural design and the control modes, voltage of the alternating-current bus and the direct-current bus is maintained, and work efficiency of the V2G alternating-current and direct-current hybrid microgrid is improved.

Description

technical field [0001] The invention relates to a V2G bidirectional AC-DC conversion converter, which is mainly used in the conversion control of electric energy between an AC bus and a DC bus in an AC-DC hybrid micro-grid adopting V2G technology. Background technique [0002] V2G (vehicle-to-electricity interconnection mode) refers to the control technology of two-way energy flow between passenger vehicles and the grid. Electric vehicles not only receive energy from the grid in one direction, but can also provide energy support to the grid when necessary, which is the strong backing of the future smart grid. . V2G technology is the direction of new energy vehicles. Through V2G technology, the impact of electric vehicle charging on the power grid can be smoothed, not only can the charging time and charging power be controlled, but also reversely discharge to the power grid when necessary, thereby alleviating the peak pressure on the power grid . [0003] The development of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J5/00H02M7/797
CPCH02J3/38H02J5/00H02M7/797
Inventor 孔启翔彭以光庞先标王建强杜宏
Owner BEIJING BEIBIAN MICRO GRID TECH
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