1. IEC Measurement and assessment of power quality characteristics of grid connected wind turbines
Convener John Tande, SINTEF (NO)
Presented by group member Poul Sørensen, Risø DTU (DK)

2. Outline of this presentation
Scope
Participants and meetings
Status
Timeline
TC88 meeting Boulder
March 2010

3. Wind Power Plants and Grid Integration
Power system issues
fault ride through
power balancing
reactive power
voltage control
frequency control
short circuit power
inertia
Local voltage quality
voltage intervals
inrush currents
flicker
harmonics
Mechanical
design
Simple and robust
fixed speed(s)
fixed pitch
passive (stall) control
Advanced
variable speed
pitch control
generator torque control
reactive power control
millennium
TC88 meeting Boulder
March 2010

4. Scope of IEC Ed 2.0
To prepare a revision of the standard IEC (ed 1, 2001) Measurement and assessment of power quality characteristics of grid connected wind turbines, taking into account recent experiences and technical needs, much related to the development of utility “grid codes” setting specific requirements to the characteristics of large wind farms:
New items
Response to voltage drops
Active power control
Reactive power control
Grid protection
Reconnection time
Adjustments on Ed.1 power quality issues
max power
flicker,
harmonics
TC88 meeting Boulder
March 2010

5. Participants and meetings
The maintenance team counts about 28 members from 11 countries (DE, DK, ES, FI, FR, JP, NL, NO, PT, SE and US). The team includes a sound mixture of participants from industry, test stations, utility, research and consultancy.
For preparing Ed.2 the maintenance team has held seven meetings, thereof the last in San Francisco, CA, USA, September The meeting was for dealing with comments on the CDV and preparing issuing the document as FDIS.
TC88 meeting Boulder
March 2010

6. Status Ed 2 was published in 2008-8 according to scope of revision.
TC88 meeting Boulder
March 2010

7. Timeline Future possible new items for revision: Past timeline
Stage
  Document
  Decision date
  Target date
AMW
  88/201/MCR  
1CD
  88/261/CD    
ACDV
  88/293/CC    
CCDV
  88/299/CDV    
ADIS
  88/313/RVC    
DEC    
RDIS    
CDIS
  88/317/FDIS    
APUB
  88/326/RVD  
BPUB    
PPUB    
No short term plan for NWIP
On a little longer term, some issues are likely to be relevant:
Wind farm tests and measurements
Wind farm connection to HVDC grids
Industrial need for more accurate harmonic test and assessment procedures (pres. ref to IEC , but wind power is leading large scale power converter employment)
TC88 meeting Boulder
March 2010