Activities of Joint Cigr

1
Activities of Joint Cigré/CIRED/UIE Power
Quality Working GroupGeneral Aspects

• Erich W. Gunther
• Electrotek Concepts, Inc USA
• Convener Cigré C4.05/CIRED 2/UIE - CCU2

2
History Scope of CCU2

• In existence since 1977 as a permanent Cigré
  working group
• Study of the low-frequency disturbances
  (harmonics, flicker, unbalance and voltage dips)
  caused either by the loads or, sometimes, by the
  transmission and distribution systems themselves.
• Study methods of prediction and measurement of
  the corresponding parameters of these
  disturbances.
• Assessment of limit values of these parameters
  and corresponding values of probability.
• Maintain liaisons with other organizations
  concerned with similar studies technology
  transfer is sometimes considered our most
  beneficial product. More than 2000 documents
  distributed within the working group since 1977.
• Despite the voltage quality designation in the
  official name, we handle current also

3
Cigré C4.05, CIRED 2, UIEPQ - CCU2

• The CIRED power quality working group is a joint
  working group. Originally with Cigré 36.05
  (recently renamed C4.05) and was designated CC02.
  Three years ago, UIE PQ formally joined the
  group to create CCU2
• Three groups with common interest in power
  quality have joined forces with common members,
  meetings, and publications to maximize results
  and minimize overhead
• Meet 1 or more times per year
• Last meetings in Düsseldorf and Brussels
• Meet next week in Madrid. Next meeting at the
  joint Cigré/IEEE symposium in October 2003

4
Diverse disciplines and expertise

• Voltage quality issues require expertise in many
  different technical areas.
• Consequently, CCU2 membership is large (52
  members from gt 20 countries) but with a core
  group of 10 or so who regularly attend meetings.
• Same members of CCU2 are also members of other
  power quality related organizations. Reality of
  limited travel budgets necessitates cooperation
  between groups and common meetings where possible.

5
Work in progress

• Flicker meter test/certification protocol
• Extend UIE/IEC flicker meter specification to
  cover 100 volt lamps (Japan)
• Paper on worldwide flicker compatibility levels,
  contract levels, practical levels, measured
  values, and actual experiences
• Paper on impact of utility deregulation on power
  quality
• UIE Guide Part 3 Harmonics

6
Coordination with other groups

• CCU2 maintains a list of coordinating groups,
  their conveners, and work underway to keep
  everyone informed
• Close coordination with IEC, IEEE and other
  groups via common membership
• IEC often requests CCU2 perform specific tasks
• New IEEE Power Quality Subcommittee formed under
  TD Committee most power quality related
  working groups moved there
• IEEE Power Quality Standards Coordinating
  Committee SCC-22 new agreement between IEEE and
  IEC to appoint IEEE representative to each PQ
  related working group

7
Coordination Accomplishments

• Interharmonics in Power Systems paper
  co-developed and published with IEEE
  interharmonic task force
• RMS variation indices and tabulation methods
  co-developed with EPRI and various IEEE working
  groups
• RMS variation indices work turned over to new
  Cigré working group (C4.07) for additional work
• IEC and IEEE SCC-22 have formal agreement to
  share working documents between power quality
  groups and appoint IEEE representatives to IEC
  WGs
• IEEE flicker task force has adopted IEC
  61000-4-15 as flicker meter standard details
  being finalized
• IEEE 1159.1 (PQ measurements) and 1159.2
  (characterization) being harmonized with
  61000-4-30

8
Future work

• Review flicker requirements specified in wind
  power standards, identify conflicts, make
  recommendations for resolution
• Request from IEC TC77A WG9 - Dip (sag) / swell /
  momentary interruption meter test protocol based
  on 61000-4-30 requirements
• Harmonic meter test protocol based on 61000-4-7
  2nd Edition and 61000-4-30 requirements
• Request from IEC TC 77A to review harmonic
  compatibility levels

9
Conclusion

• There are still many power quality issues to
  understand and solve
• Pooling of technical resources necessary to
  maximize progress due to companies limited
  budgets for standards participation
• Distributed generation and utility deregulation
  creating new challenges for managing power
  quality and reliability
• CCU2 Web Site http//www.ccu2.org/