Feeder terminal device and signal acquisition calculation and line selection method thereof

A technology of feeder terminal device and line selection method, which is applied in the direction of measurement device, fault location, circuit breaker test, etc., can solve problems such as inability to meet, achieve high accuracy and reliability, accurately collect signal quantity, and reduce misoperation Effect

Pending Publication Date: 2021-03-26
SHANDONG ELECTRICAL ENG & EQUIP GRP XINNENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing feeder terminal devices have been unable to meet the a

Method used

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  • Feeder terminal device and signal acquisition calculation and line selection method thereof
  • Feeder terminal device and signal acquisition calculation and line selection method thereof
  • Feeder terminal device and signal acquisition calculation and line selection method thereof

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Embodiment Construction

[0019] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 Shown is a schematic diagram of the circuit principle of the front-end signal acquisition module of the embodiment of the present invention. Front-end signal acquisition module, including: electromagnetic voltage and current transformer T7 with wide voltage output range, magnetic bead L7 for absorbing high-frequency noise and spike interference; bidirectional TVS tube D8 can absorb input transient high voltage and protect the subsequent circuit ; R28, R29, R73, C23 and C24 are resistance-capacitance components; V1 and V1GND are electrical connection network labels.

[0021] Magnetic beads L7 and resistor R28 are connected in series on the first branch of the output of the transformer T7, and a resistor R73 is connected in series on the second branch of the output of the transformer T7; the first branch before the magnetic bead ...

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PUM

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Abstract

The invention relates to a feeder terminal device, which comprises a front-end signal acquisition module, an analog-to-digital conversion module and a data reading module, which are connected in sequence; the front-end signal acquisition module converts acquired low-voltage and low-current signals into small-voltage signals; the analog-to-digital conversion module is provided with eight channels,a 16-bit parallel data reading mode is adopted, the signal acquisition frequency is more than 6 kHZ, and the data reading module is configured with a 16-bit wide data bus. The invention also relates to a signal acquisition and line selection method based on the feeder terminal. On the basis of a traditional acquisition circuit, a front-end acquisition circuit is optimized, an AD chip with higher performance is selected, and a 16-bit parallel bus is adopted to read data, so that the acquisition precision and rate are improved, the quantization error is reduced, the semaphore is accurately acquired, and the sampling rate is increased. According to the method, the defects of limitation of application to specific working conditions and easy maloperation are avoided, and the wavelet line selection method with higher accuracy and reliability is selected.

Description

technical field [0001] The invention belongs to the technical field of feeder terminal equipment, and in particular relates to a feeder terminal device with high-precision and high-speed signal acquisition and a method for signal acquisition calculation and line selection thereof. Background technique [0002] The feeder terminal device is a distribution network automation terminal product developed for pole-mounted switches, and is the preferred supporting model for various types of pole-mounted switch automation. The feeder terminal device is responsible for the collection of switching and measuring quantities of switchgear such as switches on the pole. After processing, it realizes fault identification, fault location, and fault isolation of the feeder line; it reports to the superior master station or sub-station according to the communication protocol, and Accept orders issued by the superior master station or sub-station. [0003] With the development of the power mar...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R31/327
CPCG01R31/088G01R31/085G01R31/327
Inventor 袁有扩刘树通宋春雷张豪林麟王书宁曹文华
Owner SHANDONG ELECTRICAL ENG & EQUIP GRP XINNENG TECH CO LTD
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