IEEE Working Group on the Lightning Performance of Distribution Lines

1996 Winter Power Meeting Working Group Minutes

The working group met at the 1996 Winter Power Meeting in Baltimore, MA - Tuesday, Jan. 23, 1996, 8am-10am

Attendance

24 members and guests attended.

Survey Discussions

Tom Short made a short presentation prepared by Ron Ammon of LILCO on the results of the working group survey sent out by EEI (enclosed). The results were interesting, and the consensus seemed to be to publish the information either as an IEEE WG paper or a magazine article. Tom will contact Ron about options for publishing the results.

Design Guide Discussions

We had a very good discussion on Draft #3 of the design guide. Several items are highlighted:

• Induced Voltage Model with Shielding: The induced voltage model when used in a shielded area (Fig. 3 and 4, top curves) gives answers which show much higher flashovers at high CFO than experience shows. Matt Darveniza volunteered to check the model.
• Arrester Energy Section: The arrester energy section is very misleading and will be reworked under the heading Arrester Direct Stroke Capability.
• Definition of a Shield Wire: A definition will be added for a shield wire to be consistent with the transmission working group.
• Shield Wire Results: The results given in Fig. 7 are to be replaced by results from IEEE Flash V1.7.
• Predischarge Current and Shield Wires: Some mention should be made of predischarge currents and shield wire protection, and John Anderson volunteered to write a short paragraph.
• GFD: Several comments were made on the use of lightning detection network ground flash density data. Chris Hickman offered to write a short paragraph on the transition to using this data. Jeff Tuel, GAI offered the use of a GFD map (Fig. 5 of the Byerley paper which is enclosed). Also to be included is a mention of the standard deviation of lightning phenomenon and its effect on the number of years necessary to achieve a certain accuracy.
• Working Group Member Names: A working group member list is enclosed which will be included with the guide. If there are any changes, please contact Tom Short.

Other Working Group Activities

• Panel session at the 96 T&D Expo: We are hoping to be on the schedule for the 96 T&D conference. The topics we have tentatively have so far are:

• Web site: There was interest in setting up an Internet web site for the group use. About 60% of the meeting attendees had access the web. It would be useful for things like meeting minutes, survey results, and other activities.
  
  

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