Alarming device and method for detecting harmonic waves of vehicle-mounted converter

A technology of alarm devices and converters, applied to measuring devices, measuring electrical variables, instruments, etc., can solve the problems of low detection accuracy, low flexibility and usability, and low reliability

Active Publication Date: 2013-11-20
HUNAN CRRC TIMES SIGNAL & COMM CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] In view of this, the object of the present invention is to provide an alarm device and method for detecting harmonics of vehicle-mounted converters, wh

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  • Alarming device and method for detecting harmonic waves of vehicle-mounted converter
  • Alarming device and method for detecting harmonic waves of vehicle-mounted converter
  • Alarming device and method for detecting harmonic waves of vehicle-mounted converter

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Embodiment approach

[0094] The digital signal processing unit 5 further adopts a floating-point DSP chip TMS320C6713B of TI Company, of course, other types of processors can be used instead of the DSP chip TMS320C6713B in the specific embodiment of the present invention. The chip is a 32-bit high-speed floating-point DSP with a maximum clock frequency of 300MHz and a very long instruction word (VLIW) architecture. Its maximum processing capacity can reach 2400MIPS, the primary memory size is 8KByte, the secondary memory size is 256KByte, and the 32-bit external memory interface can seamlessly connect SRAM, EPROM, Flash, SBSRAM and SDRAM. as attached Image 6 Shown is a minimum system composition block diagram of the digital signal processing unit 5 , the minimum system also includes a memory 8 and a clock and reset unit 9 , and both the memory 8 and the clock and reset unit 9 are connected to the digital signal processing unit 5 . as attached Figure 7 As shown, the digital signal processing un...

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Abstract

The invention discloses an alarming device and an alarming method for detecting harmonic waves of a vehicle-mounted converter. A hollow transformer is used for converting a sensed current signal into a voltage signal, and outputting the voltage signal to an isolation unit. The isolation unit is used for performing isolation amplification on the signal, and outputting the processed signal to a filtering unit. The filtering unit is used for performing low-pass filtering processing on the signal, and outputting the signal to an A/D (analogue/digital) sampling unit. The A/D sampling unit is used for performing sampling and A/D conversion on the signal output by the filtering unit, and outputting the converted signal to a digital signal processing unit. The digital signal processing unit is used for performing processing on the converted digital signal to judge whether an interference signal of which the frequency is the same as that of a track relay driving signal representative of a track occupation condition in the digital signal exceeds a threshold value or not, and outputting an alarming signal to a converter master control unit through an alarming output unit. According to the device and the method, the technical problems of low detection accuracy, high false alarm rate, low flexibility and availability and low reliability of the prior art are solved.

Description

technical field [0001] The invention relates to a track electrical alarm device and a method thereof, in particular to an alarm device and a method for detecting harmonics of a vehicle-mounted converter. Background technique [0002] A converter is an electrical device that changes the voltage, frequency, phase number, and other quantities or characteristics of a power system. Including AC to DC (AC / DC) rectifier, DC to AC (DC / AC) inverter, AC frequency conversion (AC / AC) AC converter and DC chopper (DC Chopper) DC converter . Vehicle-mounted converters include traction converters, auxiliary power converters, etc. These converters will generate current harmonics of conduction interference during operation, and the magnitude and duration of current harmonics will affect the performance of other equipment. To work normally, it is necessary to detect the interference of current harmonics in real time. [0003] When the vehicle-mounted converter is working, it is easy to gene...

Claims

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Application Information

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IPC IPC(8): G01R23/165
Inventor 文玮焦玮琦陈李根罗永升袁科申竹林王业流张艳何谢振
Owner HUNAN CRRC TIMES SIGNAL & COMM CO LTD
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