Embed Size (px)
Citation preview
Frankfurt (Germany), 6-9 June 2011
Round Table 2a
Voltage Quality Monitoring, Dip Classification and
Responsibility Sharing
Kevin Niall, ESB Networks
on behalf of Eurelectric
Frankfurt (Germany), 6-9 June 2011
Objectives of Fixed PQ Monitoring Monitor PQ trends over time
Confirm that PQ is within planning limits
Provide information to DSOs to :- Validate customers complaints of PQ disturbances Assist customers with mitigation measures Assist customers with sensitive processes on location choice
Monitoring performance where a PQ contract has been agreed
Frankfurt (Germany), 6-9 June 2011
Extent of Monitoring
Not necessary to monitor all HV/MV substations
Representative sample Urban / Rural Geographic Spread
Strategic Locations Concentration of sensitive/important customers Concentration of embedded generation
Portable Instruments Necessary to investigate customer complaints
Frankfurt (Germany), 6-9 June 2011
Power Quality instruments on MV Busbars in HV/MV Substations
82% DSOs have PQ Monitoring at some HV/MV substations
Approx 50% of DSOs monitor between 0% and 30% of MV Busbars
% MV Busbars with Fixed PQ Instrumnets
0
2
4
6
8
0% 0% - 10% 10% - 30% 30% - 50% 50%-99% 100%
% MV Busbars with Fixed PQ Monitoring
Nu
mb
er o
f R
esp
on
den
ts
Frankfurt (Germany), 6-9 June 2011
VQ Monitoring Challenges
Costs Communication Storage Software
Presentation External access
Harmonized format for storing data Different recorders
Frankfurt (Germany), 6-9 June 2011
VQ Monitoring : New Requirements Developments affecting LV Systems
New Loads Electric Vehicles
Heat Pumps
Distributed Generation
SMART Metering Voltage level Voltage dips & swells
Frankfurt (Germany), 6-9 June 2011
Responsibilities
DSOs Planning the system for adequate VQ
Emission limits for customers installations
Equipment Providers Disturbance Emission limits Immunity of equipment
Customers Protection of sensitive equipment & processes
Frankfurt (Germany), 6-9 June 2011
Voltage Dips
Not possible to eliminate OH Line networks especially challenging
Possible to reduce frequency / severity: Faster Protection Undergrounding of overhead networks
Substantial Investments / Long timescales
Customer willingness to pay ?
Frankfurt (Germany), 6-9 June 2011
Voltage DIPs
Some customers sensitive to voltage dips Economically important customers
Economic solution is often in customers installation
Report of JWG C4.110
Voltage Dip Immunity of Equipment
and Installations
Frankfurt (Germany), 6-9 June 2011
Voltage Dip & Swell Classification in EN 50160
Will assist discussion between customer & DSO
Frankfurt (Germany), 6-9 June 2011
Conclusions
DSOs view VQ Monitoring as important Most DSOs have some monitoring already
New VQ Monitoring Challenges & Opportunities
Responsibility for Equipment is shared DSOs, Equipment providers, Customers
Standardisation continues to make a key contribution
