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Control method and system for inverter

A control method and technology for a control system, which are applied in the field of auxiliary inverter control methods and systems of two-stage topology, can solve problems such as large command value and current shock, and achieve stable rise of output voltage, reduction of current shock, and improvement of the system. The effect of reliability

Active Publication Date: 2021-06-25
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides an inverter control method and system to at least solve the problem of current impact caused by a large command value

Method used

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  • Control method and system for inverter
  • Control method and system for inverter
  • Control method and system for inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] This example discloses the specific implementation of the inverter control method (hereinafter referred to as the "method").

[0091] The present invention is aimed at Figure 6 In the two-stage inverter structure shown, the front stage is a DCDC module, and the rear stage is a DCAC module. The soft start and transition to steady state control ideas of the DCDC module and DCAC module are described in detail. Using the present invention, no need The additional hardware circuit and the flexible and controllable start-up time greatly reduce the current impact, protect the system components, avoid false triggering of faults, and improve the reliability of the system.

[0092] The implementation process of the technical solution adopted in the present invention is as follows:

[0093] 1) System control parameter initialization, cyclic detection of DCDC and DCAC start commands, the initial state is standby start, the initialized control parameters include the PID variable pa...

Embodiment 2

[0116] Please refer to Figure 4 , Figure 4 It is a structural schematic diagram of the inverter control system of the present invention. Such as image 3 An inverter control system of the present invention is shown, which includes:

[0117] A system control parameter initialization module, the system control parameter initialization module cyclically detects the startup commands of the DCDC module and the DCAC module;

[0118] DCDC module soft start module, after the DCDC module soft start module detects the start command of the DCDC module, soft start the DCDC module according to the DCDC module start process;

[0119] A DCAC module soft start module, the DCAC module soft start module soft starts the DCAC module according to the DCAC module start process after detecting the start command of the DCAC module.

[0120] Wherein, the control parameters of the initialization include:

[0121] The PID variable parameters of the DCDC module and the DCAC module, the soft start ...

Embodiment 3

[0138] combine Figure 5 As shown, this embodiment discloses a specific implementation manner of a computer device. The computer device may comprise a processor 81 and a memory 82 storing computer program instructions.

[0139] Specifically, the processor 81 may include a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC for short), or may be configured to implement one or more integrated circuits in the embodiments of the present application.

[0140] Among them, the memory 82 may include mass storage for data or instructions. For example without limitation, the memory 82 may include a hard disk drive (Hard Disk Drive, referred to as HDD), a floppy disk drive, a solid state drive (SolidState Drive, referred to as SSD), flash memory, optical disk, magneto-optical disk, magnetic tape or universal serial bus (Universal Serial Bus, referred to as USB) drive or a combination of two or more of the above. Storage 82 may comprise removable or non-r...

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Abstract

The invention discloses a control method and system for an inverter. The inverter comprises a DCDC module and a DCAC module which are electrically connected. The control method for the inverter comprises the following steps: a system control parameter initialization step: cyclically detecting starting commands of the DCDC module and the DCAC module; a DCDC module soft starting step: after a starting command of the DCDC module is detected, carrying out soft starting on the DCDC module according to a DCDC module starting process; and a DCAC module soft starting step: after the system detects the starting command of the DCAC module, carrying out soft starting on the DCAC module according to a DCAC module starting process. According to the invention, an additional hardware soft start circuit is not needed, and soft start can be respectively carried out on the front-stage DCDC and the rear-stage DCAC of the inverter with a two-stage topological structure.

Description

technical field [0001] The invention belongs to the field of inverter control methods, and in particular relates to a two-stage topology auxiliary inverter control method and system. Background technique [0002] Among the existing auxiliary inverters, in order to improve the power density of the equipment, a high-frequency isolation transformer solution is widely used. The front stage uses a high-frequency DC-DC converter, and the rear stage uses a three-phase inverter. This is a typical two-stage auxiliary inverter. Inverter structure. [0003] In the existing literature or inventions, the research on the soft start of the two-stage inverter is less and not comprehensive enough. The literature "Soft Start Control of Three-phase SVPWM Controlled Grid-connected Inverter" only focuses on the grid-connected operation of the inverter The soft start is explained; in the document "A Soft Start Circuit for DCDC", an additional hardware circuit is needed to realize the soft start ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/36H02M7/5387H02M7/5375
CPCH02M3/33569H02M1/36H02M7/5387H02M7/5375
Inventor 白旭峰朱洪庆李世霖陈敬东王海瑞
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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