IEEE Power Engineering Society

Task Force on Light Flicker

Meeting Minutes

IEEE PES Winter Meeting, New York, NY

Tuesday February 4, 1997

1. The meeting was opened by Larry Conrad, approximately 36 were in attendance, list attached attendance list.

2. Minutes from the Denver, PES and San Diego, IAS meetings were reviewed and approved after adding one additional action item, number 10 on the attached action item list.

3. Larry Conrad reviewed the scope and strategy of the working group to not invent a new standard unless it was absolutely necessary. A better approach might be to contribute to and positively influence UIE and IEC efforts so one standard can serve the world. Then the IEEE could embrace the IEC/UIE standards. IEEE could not support IEC flicker standards until the IEC specifically cover 120 volt incandescent lamps. Also some clarification is needed in certain areas.

4. Liaison Reports

  1. IEC Standards, Tom Key reported that 120-V limits have been submitted to the IEC TC 77 group on IEC 1000-4-15 (was IEC 868), flickermeter. Also a new technical report has been developed on processes for connection of fluctuating loads, this report will become IEC-1000-3-7, which is one of the series of standards setting limits on both sides of the meter.
  2. IEEE Standard 141 (Red Book) Larry Conrad reported the Red Book is in revision. There will be another effort to make sure the curve is correct and coordinates with what has been published in IEEE 519. Larry will also introduce the UIE/IEC flickermeter in chapter 3.
  3. Illumination Society, no report, Warren Anderson notified us that Pekka Hakkarainen of Lutron Electronics has been appointed as liaison, we will add to mailing list.
  4. UIE Working Group, Roger Burgeron report that the UIE PQ WG meet in Barcelona, Spain in Nov 97. Main activity in flicker area is a new guide and a translation of a French guide for connection of fluctuating loads. This group also developed the proposed changes to IEC flicker standards to add the 120-V lamps. Included were special case considerations on 33 Hz perturbations and addressing motor starting. Minutes are available, the next meeting will be held in Knoxville, TN March 7 and 8, 1997.
  5. CIGRE 36-5, PQ working group activities were reported by Erich Gunther.
  6. IEEE Human Factors committee requested coordination. Chairman will send a copy of the request to the Secretary to be sure we have proper coordination.

5. Old Business

  1. Larry Conrad reviewed progress on par assignments. There has not been as much action as desired. The assignments were reorganized with a new action item list. Larry urged participants to complete their assignments for the next Winter Power Meeting.
  2. Tom Key discussed the need for frequency-related limits in the new IEEE standards. The point was that after many years of using the IEEE flicker limit curve, and trying to measure voltage changes at different frequencies, it will be difficult to instantly move to a single weighted number method as in the Pst and the Plt. In some cases utilities have contracts and have enforced contracts that use a frequency-specific measurement to limit customer emissions. Our standards development work should take this into account. One step to this end can be the upcoming UIE survey of international flicker meters. The survey can identify what percent of available meters have individual frequency measurement capability. These results will be requested from UIE.

6. New Business

  1. A flicker session is desired for the PES Winter meeting in 1998. A lot of discussion went on about whether it should be a panel session, a paper session or a tutorial. Two results came out of this discussion.
    1. Tutorials at IAS and PES
    2. Regarding PES winter meeting it was agreed that a hybrid session with both papers and panel would be planned. Mark Halpin is session organizer. Roughly the session will included: a description of IEC Standards (IEC-3-7 McGranaghan, IEC 1000-4-15 Burgeron, IEC 1000-3-3/5 and lamp limits, Key) IEEE Standards, Conrad, Flicker Cases (Blooming, Wilkinson, Burch, Morinec). A keynote paper is also planned, involving all of the presenters.
  2. A presentation on testing of flicker performance of various lamps sensitivity was provided by Tom Key.

7. Summary of Action Items

a. Eight new action items were assigned, see separate action item list attached.

8. Next Meeting, IEEE IAS meeting in New Orleans, LA on October 6, 1997.

9. The meeting was adjourned at about 11:00 AM

Submitted by

T. Key, February 4, 1997