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Redundancy-synchronization-isolation control method for parallel connection or serial connection of power devices

A technology of a power device and a control method, applied in the field of optoelectronic communication, can solve the problems of high power requirements, interference, and asynchrony of the signal source

Inactive Publication Date: 2009-11-11
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a redundancy-synchronization-isolation control method for parallel or series application of power devices, so as to solve the problem of high power requirements for signal sources in the traditional technology, and the problem of asynchronous signal isolation after signal isolation, so as to be interfered

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  • Redundancy-synchronization-isolation control method for parallel connection or serial connection of power devices
  • Redundancy-synchronization-isolation control method for parallel connection or serial connection of power devices
  • Redundancy-synchronization-isolation control method for parallel connection or serial connection of power devices

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Embodiment Construction

[0019] A redundancy-synchronization-isolation control method for power devices connected in parallel or in series, the steps of the method are:

[0020] A redundancy-synchronization-isolation control method for power devices connected in parallel or in series, the steps of the method are:

[0021] (1) The multi-channel electrical pulse signals sent by the control system are respectively transmitted to the corresponding electro-optical conversion units through metal wires, the electro-optic conversion units include light-emitting diodes, and the metal wires are respectively connected to the cathode and anode of the light-emitting diodes, the said The light-emitting diode converts the electrical pulse signal into an optical signal and outputs it through the optical fiber;

[0022] (2) The optical signals output by the plurality of electro-optical conversion units are respectively transmitted to corresponding optical splitters through optical fibers, and the one optical splitter ...

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Abstract

The invention discloses a redundancy-synchronization-isolation control method for the parallel connection or the serial connection of power devices. The characteristics of channels of light signals in an adopted light-way divider are uniform, the length of optical fibers is equal to or close to one another, and the two conditions guarantee the uniformity of the light-transfer characteristics of channels; and the difference of a light receiver and a light coupler lies in the case that voltage isolation does not need to be taken into consideration, and therefore the uniformity and the sensitivity of the light receiver are extremely superior to the light coupler. The uniformity of the transfer channels and the uniformity of parameters of the light receiver guarantee the synchronization of time of a control signal reaching each power device. The method produces the light-way divider into the mode of multiple-input-multiple-output, and a redundancy signal source is additionally arranged in a control system so that N+1 redundancy control can be realized.

Description

technical field [0001] The invention relates to the technical field of optoelectronic communication, in particular to a redundancy-synchronization-isolation control method for parallel or serial connection of power devices. Background technique [0002] High-power devices (including thyristors, IGBTs, MOSFETs, GTOs, and IGCTs) are widely used in the fields of power electronics and electric energy. With the increasing demand for various high-power and high-voltage power electronic devices, it is a very common way to connect multiple high-power devices in parallel or in series. [0003] At present, the application of high-power devices faces the problem that the control signal is susceptible to interference, and it is difficult to achieve safe electrical isolation from the control loop. In the application of high-power devices in parallel, it also faces the problem of how to improve the consistency of the control signal when it reaches each parallel or series power device. . ...

Claims

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Application Information

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IPC IPC(8): G02B6/42H04B10/12H04B10/032
Inventor 黄连生傅鹏
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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