IGBT-based bi-directional power conversion AC-DC control system and method

A control method and control system technology, applied in the field of IGBT-based bidirectional power conversion AC-DC control system, can solve problems such as harmonic pollution that cannot be overcome

Pending Publication Date: 2019-01-15
GUANGDONG ANHEWEI ELECTRIC POWER CONSTR CO LTD
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  • Application Information

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Problems solved by technology

[0007] The difficulty lies in: the existing technology can

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  • IGBT-based bi-directional power conversion AC-DC control system and method
  • IGBT-based bi-directional power conversion AC-DC control system and method
  • IGBT-based bi-directional power conversion AC-DC control system and method

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Example Embodiment

[0073] In order to further understand the content, features and effects of the present invention, the following embodiments are exemplified and described in detail below with the accompanying drawings.

[0074] The IGBT-based AC-DC control method for bidirectional power conversion provided by the embodiment of the present invention includes:

[0075] The system topology on the first high voltage start switch tube and the second high voltage start switch tube adopts the LCL+IGBT structure. After the current is connected at the access end, it passes through the circuit control end, and the current source adopts direct current control;

[0076] Establish a transformer-based low-frequency equivalent model based on the dq coordinate transformation of the local circuit, and give a steady-state characteristic analysis;

[0077] At the same time, establish a reduced-order small signal mathematical model to control the AC-DC system;

[0078] The control system adopts a voltage outer loop to cont...

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Abstract

The invention belongs to the technical field of AC-DC-AC electric drive, and discloses a bi-directional power conversion AC based on IGBT. DC control system and method, The control system is providedwith an access terminal, a first high-voltage start-up switch tube, a circuit control terminal, a current source, a second high-voltage start-up switch tube, a monitoring device, a terminal, an upperswitch group, an isolator, a control system, a controllable switch, a power supply module, a comparator, a lower switch group, a three-phase inverter, a diode group, a display screen, a voltage sensor, a temperature sensor and a current sensor. The control system of the invention adopts a voltage outer loop and a current inner loop double closed loop system, wherein the voltage outer loop controlsthe output voltage and the current inner loop controls the input current, so as to realize the correction of the unity power factor. The DC system can be reassembled in multiple sets and the controlterminals are reserved, which can be distributed intelligently according to the BMS system and the current load level for the convenience of users.

Description

technical field [0001] The invention belongs to the technical field of AC-DC-AC electric transmission, and in particular relates to an IGBT-based bidirectional power conversion AC-DC control system and method. Background technique [0002] In recent years, with the increase of the country's support for new energy vehicles, the scale of the industry is increasing year by year. In 2017, the production of new energy vehicles accounted for 2.7% of the total production of vehicles, ranking first in the world for three consecutive years. However, the vehicle-to-pile ratio of new energy vehicles in my country is currently less than 3.5:1, and the construction of charging infrastructure has become a major problem restricting the development of new energy vehicles. The development of charging piles will put forward higher requirements on the capacity and performance of the power grid, so it is an inevitable trend for charging stations to develop towards a micro-grid with a decentrali...

Claims

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Application Information

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IPC IPC(8): H02M7/797
CPCH02M7/797
Inventor 叶楚安黄大强刘明军邓文龙张恩泽
Owner GUANGDONG ANHEWEI ELECTRIC POWER CONSTR CO LTD
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