An electromagnetic anti-interference device for a sub-module controller of a flexible DC transmission valve

A flexible direct current transmission, electromagnetic anti-interference technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problem of large space occupation, and achieve the effect of reasonable matching, small size and reliable heat dissipation

Active Publication Date: 2015-09-23
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electromagnetic anti-interference measures at the controller board level generally use various independent devices to solve the relevant electromagnetic anti-interference tests, and various independent devices occupy a large space, and the parameter selection of the device should also be considered in many aspects

Method used

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  • An electromagnetic anti-interference device for a sub-module controller of a flexible DC transmission valve
  • An electromagnetic anti-interference device for a sub-module controller of a flexible DC transmission valve
  • An electromagnetic anti-interference device for a sub-module controller of a flexible DC transmission valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1: Electromagnetic anti-interference device selection

[0057] Surge immunity test, the purpose of which is to use 1.2 / 50us (voltage)-8 / 20us (current) combined wave surge to test the equipment's response to switching phenomena in the power grid, faults in the power grid and lightning strikes (direct or indirect lightning strikes) ) immunity to unidirectional transients.

[0058] The method and wiring diagram of the surge immunity test are as follows: image 3 Shown:

[0059] The technical parameters selected for the test of the surge pulse module PNW2050:

[0060]

[0061]

[0062] During the experiment, the output port of the DC15V DC switching power supply (or the output port of the 220V through the isolation transformer) is connected to the interference signal generator, and the same voltage is coupled through the external coupling network CDN131 / 133, and connected to the power input port of the equipment under test (EUT) , the wiring diagram is as ...

Embodiment 2

[0069] Embodiment 2: Parameter matching of electromagnetic anti-interference device

[0070] For various electromagnetic anti-interference test standards, the parameter matching of main components needs to consider the following:

[0071] The working voltage of the varistor and the transient voltage suppression diode should be determined according to the voltage of the subsequent stage, and the capacity should be determined according to the energy in the test. The TVS chooses 1500W SMBJ18CA. The surge current of the varistor is 220KD20 of 3000A. .

[0072] The selection of common-mode inductors mainly considers the flow capacity and suppression of common-mode interference. Determine the wire diameter of the common mode inductor according to the principle of 5A per square millimeter. And choose a high-frequency core to filter out high-frequency interference.

[0073] For electrolytic capacitors and X capacitors, the voltage level selection is determined according to the act...

Embodiment 3

[0074] Embodiment 3: structure encapsulation design

[0075] According to the selected electromagnetic anti-interference device, it is packaged in a module, and finally there are only two input ports and two output ports. Minimize volume and improve integration. Finally, it is plastic-packed into a separate module, which is applied to the power input port of the circuit board of the controller, and can be directly welded on the circuit board. The structure diagram of the device is as figure 2 . Its placement must be in accordance with the principle figure 1 To place in order, first place a safety capacitor CX1, varistor RV, TVS, common mode inductor L, electrolytic capacitor CE, and safety capacitor CX2 at the input end.

[0076] The invention introduces the parameter requirements, type selection method and structural design of each device in the electromagnetic anti-jamming module. The design is novel and practical, and can guide other designers to complete similar elect...

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Abstract

The invention provides an electromagnetic anti-interference device for a sub-module controller of a flexible DC transmission valve, belonging to the field of electromagnetic anti-interference design of a flexible DC transmission system. The device improves the electromagnetic anti-interference ability of each sub-module of the flexible direct current transmission system, and has good versatility, so that all control boards of the whole system can use the device, reducing the cost of the whole system. The anti-interference device conducts targeted selection of varistors, transient voltage suppression diodes (TVS), electrolytic capacitors, X capacitors, common mode inductors and other devices to match the parameters, and then concentrates them in one module for packaging. The module has two input ports and two output ports. The device of the invention centrally encapsulates various devices in one module, with reasonable parameter matching, small overall volume, high integration, and reliable performance; it can be applied to the power input ports of various circuit boards, directly welded, and very easy to install. convenient.

Description

technical field [0001] The invention belongs to the field of electromagnetic anti-interference design of a flexible direct current transmission system, and in particular relates to an electromagnetic anti-interference device for a sub-module controller of a flexible direct current transmission valve. Background technique [0002] Different from traditional HVDC transmission based on natural commutation technology of current source converter, flexible HVDC technology is a new type based on voltage source converter, controllable turn-off device and pulse width modulation (PWM technology). DC transmission technology, the voltage source converter (VSC for short) is the core equipment of the flexible DC transmission system. This power transmission technology can instantaneously realize independent decoupling control of active power and reactive power, can supply power to passive networks, does not require communication between converter stations, and is easy to form a multi-termi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/44
Inventor 杨卫刚杨岳峰吕铮贺之渊国彬
Owner CHINA ELECTRIC POWER RES INST
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