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

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  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