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Optical fiber connecting method for cascade type medium-high voltage frequency convertor

A medium and high voltage frequency converter and optical fiber connection technology, applied in the direction of irreversible DC power input conversion to AC power output, instruments, output power conversion devices, etc., can solve the problem of large number of optical fibers and optical fiber transceivers, complex connections, etc. problem, achieve the effect of reducing the number, reducing system cost and improving reliability

Active Publication Date: 2012-05-02
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large number of power modules, the number of optical fibers and optical fiber transceivers is huge, and the connection is complicated

Method used

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  • Optical fiber connecting method for cascade type medium-high voltage frequency convertor
  • Optical fiber connecting method for cascade type medium-high voltage frequency convertor
  • Optical fiber connecting method for cascade type medium-high voltage frequency convertor

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Embodiment Construction

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] figure 1 Shown is a traditional topology diagram of a 5-level high-voltage inverter composed of 9 power units. The 9 power modules are divided into groups of three to form U group power module group, V group power module group and W group power module group respectively, and constitute the three-phase output voltage (U, V, W), U group power module group The outputs of the modules, the V group power modules and the W group power modules are respectively electrically connected to the three-phase inlets of the motor. The power modules are directly controlled by the main controller. There are two fibers between each power module and the main controller. One of them is used to send the control command of the main controller to the power module, and the other one is used to transmit the status information of the power module to the main controller. T...

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Abstract

The invention relates to an optical fiber connection method for a cascade middle and high voltage transducer, wherein, a power unit in a group is controlled by adopting a serial communication way; the output optical fiber of a main controller is connected with a first power unit in each group; the first power unit is connected with a second power unit in each group by optical fiber in series; thesecond power unit is connected with a third power unit in each group by optical fiber in series; according to the connection way, the former power unit is connected with the next power unit in each group by optical fiber in series until the output optical fiber of the last power unit is connected with the main controller; the power units in each group are connected with each other in series from beginning to end by using optical fiber.

Description

technical field [0001] The invention relates to a transmission mode and device for medium and high voltage frequency converters, in particular to an optical fiber connection mode for cascaded medium and high voltage frequency converters, which is mainly used for frequency conversion and speed regulation technology of motors. Background technique [0002] At present, only about 70% of the electric energy is supplied to the motor. As an effective means of motor energy saving, the motor's frequency conversion speed regulation technology has been widely used in the industrial field and gradually spread to other fields. [0003] High-voltage inverter is the main way to realize high-power motor frequency conversion speed regulation technology. Because the power unit is connected in series with a multi-level type, it has obvious advantages in system stability, control mode, debugging range and harmonic pollution to the power grid. Therefore, it has become the mainstream implement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00H02M5/00H02M7/48G08C23/06
Inventor 罗仁俊蓝德劭曹洋王小方李军
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS