Partial discharge electro-acoustic signals synchronous monitoring device for CPLD (complex programmable logic device)-based transformer

A partial discharge and monitoring device technology, which is applied in the direction of measuring devices, instruments, and testing dielectric strength, etc., can solve problems such as low accuracy and low reliability, achieve high working stability, improve accuracy and real-time performance , Improve the effect of reliability and flexibility

Inactive Publication Date: 2013-09-18
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the literature consulted by the inventor, there is no relevant literature report on the application of CPLD in the on-line monitoring equipment for partial discharge signals of transformers.
Therefore, the inventor feels that

Method used

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  • Partial discharge electro-acoustic signals synchronous monitoring device for CPLD (complex programmable logic device)-based transformer
  • Partial discharge electro-acoustic signals synchronous monitoring device for CPLD (complex programmable logic device)-based transformer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1:

[0030] A CPLD-based transformer partial discharge electro-acoustic signal synchronous monitoring device, including a sensor module 1, a signal conditioning module 3, a four-channel synchronous sampling ADC 4 and an upper computer 8. It is characterized in that the device also includes a CPLD control module 2, The deserializer module 5, the FIFO memory 6 and the PCI bus interface circuit 7; according to the transmission flow of the signal, the sensor module 1, the signal conditioning module 3, the four-channel synchronous sampling ADC 4, the deserializer module 5, and the FIFO memory 6 , The PCI bus interface circuit 7 and the upper computer 8 are connected in sequence, specifically:

[0031] The sensor module 1 is provided with four sensors, which are Rogowski coil sensor A 11, Rogowski coil sensor B 12, ultrasonic sensor A 13, and ultrasonic sensor B 14, respectively. The coil sensor A 11 and the Rogowski coil sensor B 12 are respectively installed at the neut...

Example Embodiment

[0035] Example 2:

[0036] The difference between this embodiment and embodiment 1 is that the CPLD control module 2 is composed of a CPLD chip 21 and a high-frequency active crystal oscillator 22, a low-frequency active crystal oscillator 23, a human-computer interaction interface 24, and RS232 respectively connected to the CPLD chip 21. The interface circuit 25 consists of the I / O port of the CPLD chip 21 and the signal conditioning module 3, the four-channel synchronous sampling ADC 4, the deserializer module 5, the FIFO memory 6, the control end of the PCI bus interface circuit 7 and the RS232 interface respectively The data terminal of the circuit 25 is bidirectionally connected, the RS232 interface circuit 25 is bidirectionally connected to the host computer 8 through the RS232 bus, and the high frequency active crystal oscillator 22 and the low frequency active crystal oscillator 23 are respectively connected to the global clock port of the CPLD chip 21.

Example Embodiment

[0037] Example 3:

[0038] As attached figure 1 As shown, a CPLD-based transformer partial discharge electro-acoustic signal synchronous monitoring device includes a sensor module 1, a CPLD control module 2, a signal conditioning module 3, a four-channel synchronous sampling ADC 4, a deserializer module 5, and a FIFO memory 6. , PCI bus interface circuit 7 and host computer 8. The sensor module 1 is equipped with four sensors, namely Rogowski coil sensor A 11, Rogowski coil sensor B 12, ultrasonic sensor A 13 and ultrasonic Sensor B 14, where Rogowski coil sensor A 11 and Rogowski coil sensor B 12 are respectively installed at the neutral point of the high and low voltage sides of the transformer, and the frequency bandwidth is set to 10kHz~10MHz. To convert the pulse current at the high and low voltage side ground points of the transformer into a voltage signal that can be used for A / D conversion; ultrasonic sensor A 13 and ultrasonic sensor B 14 are respectively pasted on the h...

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Abstract

The invention discloses a partial discharge electro-acoustic signals synchronous monitoring device for a CPLD (complex programmable logic device)-based transformer. The device comprises a CPLD control module, as well as a sensor module, a signal conditioning module, a four-channel synchronous sampling ADC (analog to digital converter), a deserializer module, an FIFO (first in first out) storer, a PCI (peripheral component interconnect) bus interface circuit and a host computer which are respectively connected with the CPLD control module. After the device is used, the signal conditioning, the synchronous A/D (analog to digital) sampling and the data placement are carried out on a plurality of electro-acoustic signals generated by the partial discharge of the transformer by the CPLD control signal conditioning module, the four-channel synchronous sampling ADC and the FIFO storer, and the electro-acoustic signals are uploaded to the host computer through a PCI bus to be comprehensively analyzed and processed, so that the wideband electro-acoustic signals can be synchronously monitored on the line, the integrated partial discharge signal characteristic can be timely obtained, the monitoring veracity can be improved, and the device is high in reliability, high in anti-jamming capability, and stable to run.

Description

technical field [0001] The invention belongs to monitoring equipment for synchronous sampling of electro-acoustic signals generated by partial discharge of transformers, in particular to a monitoring device based on CPLD for synchronous sampling of electro-acoustic signals of transformer partial discharges. Background technique [0002] Real-time online monitoring of the partial discharge signal of the transformer can detect the insulation aging of the transformer and predict the development trend of the fault in time, so as to prevent the occurrence of malignant accidents; therefore, some online monitoring devices have been developed, such as the Chinese patent application number 201210279848.3 Disclosed is a dry-type transformer partial discharge on-line monitoring and its positioning method. The first ultrasonic sensor, the second ultrasonic sensor, the third ultrasonic sensor, and the fourth ultrasonic sensor respectively collect the ultrasonic signals in the partial disc...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01H17/00
Inventor 韦善革李雪吴杰康
Owner GUANGXI UNIV
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