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Wireless Data Acquisition System for Electrical Emission Measurement in Substations

This study presents a Wireless Data Acquisition System designed for measuring electrical emissions in substations. The goal is to capture EMI signals generated by switching actions using advanced sensors and digital storage oscilloscopes. By replacing traditional fiber optic links, this wireless system enhances mobility and ease of deployment while utilizing digital communication technologies to improve signal processing. The new architecture includes a Remote Acquisition Unit (RAU) and employs bi-directional wireless networking to ensure efficient data transmission and control.

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Wireless Data Acquisition System for Electrical Emission Measurement in Substations

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  1. Wireless Data Acquisition System and its application for electrical emission measurement in Substations Supervised by Dr. W.H.Siew Presented by Yu Wang

  2. Introduction of electrical emission measurement in substations • Purpose: To capture and record EMI signal caused by the switching actions in substation • Equipment: Sensors, Optical Fibber Links, Digital Storage Oscilloscopes(DSO), and Computers • Fibre Analog System

  3. Proposal of Wireless Digital System • Fiber optical link is Difficult to layout and easy to be broken • Main promotion: For most convenience and mobility (why wireless) • To carry an analog signal with 20MHz bandwidth, it needs too large bandwidth for carrier wave (why digital) • To take the advantage of modern digital communication technology to overcome EMI in the field (why digital)

  4. The structure of new system • Make up of RAU (Remote Acquisition Unit), wireless network and application software in PC side Wireless modem Sensor-1 RAU-1 Sensor-n RAU-n

  5. Remote Acquisition Unit (RAU) • 100M A/D Sampling rate • 500K bytes buffer • UART Interface to wireless modem • Trigger control functions and all the main function of a DSO ( Digital Storage Oscilloscope)

  6. Block Diagram of Acquisition RS-232 Trigger function Interface to A/D CPLD XC95288-LV-144 Interface to CPU TTL A/D CPU Interface to MEM RS-485 Memory

  7. Wireless network • Point-To-Multipoint Bi-Directional network • ARQ for concentrative interruption • FEC for random distributive interruption • Speed, Distance and license free

  8. Control platform in PC side • HCI (Human Control Interface) to RAU • Collection data and save them in local disc • Separated DSO Removed Wireless modem Wireless modem

  9. Current stage of development • PC Platform (finished) • Cable network link (finished) • Acquisition (finished) • Replacing Cable link with wireless modem

  10. Information wanted • Any suggestion for selection of wireless modem and all the information about such product are welcomed. • Contact me by E-mail: y.wang@eee.strath.ac.uk Ext. No: 2108 for James 

  11. . Thank you ! .

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