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Field bus type alternating voltage sensor and working method thereof

A technology of AC voltage and field bus, applied in the direction of measuring current/voltage, voltage divider, instrument, etc., can solve the complexity of the field bus system, hinder the standardization of intelligent AC voltage sensors, and unfavorable the development of 25kV power distribution and electrical device technology, etc. problems, to achieve the effect of promoting intelligence

Pending Publication Date: 2017-08-29
武汉黎赛科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the fieldbus system complex and requires the distribution network to have an adaptive function, which requires the direct participation of the fieldbus AC voltage sensor to achieve
At the same time, the rated output voltage of the secondary side of the existing voltage sensor is various, which hinders the standardization of intelligent AC voltage sensors and is not conducive to the technical development of 25kV power distribution and power consumption devices

Method used

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  • Field bus type alternating voltage sensor and working method thereof
  • Field bus type alternating voltage sensor and working method thereof
  • Field bus type alternating voltage sensor and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Figure 1a It is a structural schematic diagram of the field bus type AC voltage sensor in Embodiment 1 of the present invention, Figure 1b It is a schematic structural diagram of a voltage sensor provided in Embodiment 1 of the present invention, Figure 1c It is a schematic diagram of the structure of the high-voltage arm resistance in Embodiment 1 of the present invention. This embodiment can be applied to detect the working conditions of the external equipment connected to the voltage transformer.

[0033] Such as Figure 1a As shown, the field bus type AC voltage sensor includes: high-voltage arm series resistor 120, low-voltage arm series resistor 130, signal conditioning module 140, analog-to-digital conversion module 150, digital signal processing module 160, communication interface module 170 and power supply module 190 , also includes: a field bus communication interface 1119, connected to the communication interface module 170, used to receive the signal pro...

Embodiment 2

[0058] figure 2 It is a flow chart of generating voltage control codes in the working method of the AC voltage sensor provided in Embodiment 2 of the present invention. This embodiment is applicable to judging the working conditions of external equipment circuits. This method can be implemented by an analog-to-digital conversion module and a digital processing module. Execute, specifically include the following steps:

[0059] Step 210, the voltage sampling digital signal is provided by the analog-to-digital conversion module, and the effective value of the AC voltage is calculated;

[0060] Wherein, the digital signal processing module 160 calculates the extracted voltage digital signal to obtain the effective value of the AC voltage. When the analog-to-digital conversion module 150 samples and quantizes the analog signal to obtain the sampled digital signal, the sampling rate of each wave is 80 points.

[0061] Wherein, the digital processing unit of the digital signal pr...

Embodiment 3

[0069] image 3 The flow chart of generating control codes in the working method of the AC voltage sensor provided by Embodiment 3 of the present invention specifically includes the following steps:

[0070] Step 310, providing a voltage sampling digital signal by the analog-to-digital conversion module;

[0071] Wherein, when the analog-to-digital conversion module 150 samples and quantizes the analog signal to obtain the sampled digital signal, the sampling rate per cycle is 80 points.

[0072] Wherein, the digital processing unit of the digital signal processing module 160 extracts the sampling digital signal of the secondary voltage of the resistor divider from its storage unit under the control of the instruction program, and then performs related calculations according to the specific instruction program.

[0073] Preferably, when extracting the sampled digital signal, a digital signal of one continuous cycle of the secondary voltage can be extracted.

[0074] Exemplar...

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Abstract

The present invention discloses a field bus type alternating voltage sensor. The sensor comprises a high-voltage arm series resistor, a low-voltage arm series resistor, a signal conditioning module, an analog-to-digital conversion module, a digital signal processing module, a communication interface module and a power module, and the sensor also comprises a field bus communication interface connected with the communication interface module and configured to receive signals after processing through the digital signal processing module from the communication interface module and transmit the signals after processing to a connected field bus. In the alternating voltage sensor, the digital information is sent to the field bus, users extract required data on the field bus according to their own requirements, and data is transmitted to the users through the field bus mode so as to solve the field data transmission problem, promote the intelligence of voltage sensing and integration and digitalization between control devices, and reach the effect of intelligence of the voltage sensor.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electrical equipment, and in particular to a field bus type AC voltage sensor and a working method thereof. Background technique [0002] In the fields of rail transit, power equipment and distribution network, sensors play an important role. In the whole system, sensors are responsible for voltage conversion, line protection and alarm. [0003] At present, most of the AC voltage sensors used are 25kV electromagnetic voltage transformers, electronic voltage transformers and non-traditional voltage transformers. The secondary AC voltage proportional to the number of winding turns, the working principle of the electronic voltage transformer is the same as that of the transformer, and the basic structure is also the iron core and the primary and secondary windings. [0004] In rail transit and distribution network, the application of fieldbus to improve related technologies has become ...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R15/04
CPCG01R15/04G01R19/2503
Inventor 黎莎刘江锋
Owner 武汉黎赛科技有限责任公司