Web-based Interrogation of a Power Quality Data Acquisition Device

1. Web-based Interrogation of a Power QualityData Acquisition Device

2. DESIGN TEAM: Dr. Mark Halpin Glenn Wilson Team Advisor Debugger Web Page Software Research & Design Jason Koberger True RMS meter Research & Design Hardware Testing & Simulation Melissa Wilson Team Leader True RMS meter Research, Design & Simulation

3. Problem • Signal Information is not Readily Available • Remotely • Nonexistent • On-site • Must have computer available

4. Circuit

5. Squared Integrated over 1 period RMS Output Signal Square Root Flow Diagram Incoming Signal

6. Hardware Design Constraint For voltage readings, the circuitry and display must begin reading at a minimum of 1 Volt and be accurate to ± 1 Volt. Also, the voltmeter must act as a True RMS voltmeter.

7. Accuracy Results Worst deviation from actual value

8. Accuracy Results Worst deviation from actual value

9. Hardware Design Constraint The circuitry should be able to operate correctly within the ranges of 0° C to 50° C (32° F to 122° F).

10. Temperature Constraints Worst deviation from actual value

11. Hardware Design Constraint The cost of hardware additions to the existing power quality device must be kept below $50.00.

12. Cost Comparison Maximum Cost: $50.00 Prototype Cost: $39.59 20% below cost constraint

13. Software Design Constraint The web interface must be compatible with the latest versions of both Microsoft Internet Explorer and Netscape Navigator.

14. Web Browser Compatibility

15. Software Design Constraint The server side web code must be executable via Windows NT Internet Information Server.

16. Hardware/Web Status

17. Future Work • Implement 8-1 Mux to allow switching between 8 ports on the box • Implement Indicator lights for each port • Test the update rate of the RMS circuitry and LCD screen • Package Hardware • Perform Real-Time testing on software

18. Questions?

19. References [1] “Home Power Quality,” http://energyoutlet.com/res/powerqual/index.html, Energy Outlet, Iris Communications, Inc, USA, 1996. [2] R. C. Dugan, M. F. McGranaghan, and H. W. Beaty, Electrical Power Systems Quality, McGraw-Hill, New York, New York, USA, p. 1-3, 1996. [3] W. M. Grady and A. H. Noyola, “End User and Electric Utility Perspectives,” Results of Power Quality Surveys in the United States, University of Texas at Austin, Austin, Texas, USA, 1995. [4] C. Peacock, “Interfacing the PC, ” http://www.beyondlogic.org/serial/serial3.htm, USA, February 28, 2000.

20. References [5] T. Cambra, “Developing a Visual Basic Component for IIS/MTS,” http://msdn.microsoft.com/workshop/server/components/vbmtsiis.asp, Microsoft Development Network, USA, June 19, 1998. [6] D. Adair, J. Ball, and M. Pawlan, “Trail: 2D Graphics,” http://web2.java.sun.com/ docs/books/tutorial/2d/index.html, Sun Microsystems, USA. [7] P. Coleman and M. Halpin, “Long Term Monitoring”, 1999 Southeastern Meter School & Conference, pp. 2-3, Birmingham, Alabama, USA, 1999. [8] W. Berry, “COM Objects and ASP,” http://msdn.microsoft.com/workshop/server/ asp/comtutorial.asp, Microsoft Development Network, USA, January 12, 1998.

21. References [9] “LCD Products,” http://www.eio.com/lcdprodt.htm, Electronics Information Online, USA, August 23, 2000. [10] “Newark Electronics” http://www.newark.com, Newark Electronics, USA, 2000. [11] R. Moffat, “ElectronicsCooling”, http://www.electronics-cooling.com/Resources/ECArticles/JAN97/jan97-01.htm, Stanford University, Stanford, California, USA, January 1997. [12] “California Instruments: Programmable AC Power Sources”, http://www.ixpres.com/calinst/acpower.htm, California Instruments, San Diego, California, USA, September 2000.