Transcript Title Page — max 32pt, min 28pt, max wrap to 2 lines

Electricity Service Delivery - “The Challenge”
Key Principles and Practical
Considerations for NRS 048-6
A Distributor Licensee Perspective
AMEU Technical Convention
16-18 October 2006
Gallagher Estate, Midrand
Presented by Baden Chatterton
Industry Association Resource
Centre (IARC), Eskom Holdings
1
Personal Introduction
2
 Employed at Industry Association Resource Centre (IARC),
previously Distribution Technology, R&S Division in Eskom Holdings
 Distribution Wires Incentive Based Regulation (IBR)

Implementation Committee Chairman responsible for the national
strategy and co-ordination of :
• Technical and financial aspects of the Distribution network
performance component of the Eskom Multi Year Price
Determination (MYPD) for 2006-2009
Distribution Network Performance and Quality of Supply Study
Committee (SC) Chairman responsible for the data,
systems, measuring, reporting and management of :
• Network Interruption Performance
• Quality of Supply (QOS)
• Equipment Reliability
Personal Introduction Cont.
 Member of the South African industry NRS 048 working
group (WG) responsible for the “NRS 048 - Quality of Supply”
basket of standards
 Author of NRS 048-6 standard on behalf of the NRS 048 WG
under the auspices of the Electricity Liaison Suppliers
Committee (ELSC)
3
Presentation Overview




1. Setting the scene…….
2. Introduction and overview of NRS 048-6
3. Key aspects of NRS 048-6 unpacked
4. Way forward
NRS 048-6 : Medium Voltage
Network Interruption Performance
Measuring and Reporting Standard
For NRS 048 reporting purposes,
MV is defined as the set of nominal
voltage levels 1 kV ≤ Un < 44 kV
4
5
1. Setting the Scene……
Power Quality Unpacked
Network
Interruption
Performance
6
Quality of
Supply
Power Quality
Reliability and Availability
of Supply : NRS 048-6 and 8
- Frequency of interruptions
- Duration of interruptions
Sustained interruptions
Momentary interruptions
Quality of the Voltage
Waveform : NRS 048-2
-
Voltage dips
Voltage regulation
Harmonics
Flicker
Unbalance
Electricity System in South Africa
7
GENERATION
Coal
Gas Turbine
Hydro Electric
Pump Storage
Nuclear
TRANSMISSION
765 to 220 kV Lines
Transmission
Substations
DISTRIBUTION
Distribution Lines
132kV 88kV
66kV 44kV
Distribution Substations
MV Lines
(11, 22 and 33kV)
MV/LV
transformer
LV Line
(380/220V)
Customer
Customer Expectations and Experiences
Versus Actual Power Quality Provided
Expectations,
Perceptions and
Experiences
Customers
Residential
Traction
Agriculture
Key Customers
Commercial
Redistributors
Prepaid
Mining & Industrial
Power Quality
provided
by licensees
8
Why Measure……and Report ?
NRS 048-6 provides a standard and consistent
framework of MV network interruption performance
measurement and reporting by distributor licensees
in South Africa
“To measure is to know.”
“If you cannot measure it, you cannot improve it……..”
Lord Kelvin, IEC's first President (1906)
9
Network Interruption Performance is much
more than just SAIFI and SAIDI……..
Planning and Design
Asset Management
System Automation
Network interconnectivity
Universal Access Program
Protection and telecontrol
Performance
Measurement
How and what is
measured ?
Inclusions/exclusions
of events
Skills, behaviour
and resources
Staff skills and training
Manpower optimisation
Work/Build
Management
Quality and accuracy
of build
10
External
Environment
Lightning Winds
Theft Storms
Vegetation
Planned Work
Network Performance
Systems and Data
Outage management system
Data accuracy and completeness
SCADA penetration
SAIDI : System Average Interruption Duration Index
SAIFI : System Average Interruption Frequency Index
Maintenance
Refurbishment
Live work
Staff training
Network Operation
Switching/operating
Fault finding
Supply restoration
11
2. Introduction and Overview of NRS 048-6
Overview of the NRS 048 Standards
NRS 048 Standard
NRS 048 Part
Current Status
Voltage charateristics, compatibility levels,
limits and assessment methods
NRS 048-2
Approved by ELSC
Application practices for licensees
NRS 048-4
Draft and work in progress
MV network interruption performance
measurement and reporting
NRS 048-6
Draft 4.2 (version 9 !) sent for
WG voting and ELSC voting
Application practices for end customers
NRS 048-7
Draft and work in progress
HV and EHV network and large customer
interruption performance measurement
and reporting standard
NRS 048-8
Draft and work in progress
NRS 048 : Quality of supply standard for Engineering or Wires
NRS 047 : Quality of service standard for Customer Services or Retail
12
Acknowledgements for NRS 048-6
 Tony Dold, NRS 048 WG

Chairman, eThekewni Electricity
Francisa Mabuza, Project
Leader, IARC, Eskom Holdings
Nelson Mandela Metro

 Eskom Holdings (Dx, Tx,



KSACS, Corporate and R&S)
SABS
Ekurhuleni Municipality
City Power










13
EIUG
Tshwane Electricity
Glass Industry
Chamber of Mines
City of Cape Town
Mondi Paper
Mangaung Municipality
DPE
NERSA
IST OTOKOV
Key Objectives of NRS 048-6
14
 Provide standard, accurate and reliable network
interruption performance measures for South Africa
 Minimum future system and data requirements for
interruption capturing and recording for licensees
 Framework for local and international network
performance (reliability) benchmarking and best practices
 Assist NERSA and licensees with the implementation of
Incentive Based Regulation (IBR)
 Common industry high level interruption cause
code hierarchy : identifying problem areas
 Provide annual regulatory reporting
guidelines
Foundation for NRS 048-6
 International standards, work and developments
• IEEE P1366 standard (USA)
• IEEE Task force on reporting practices
• CIGRE : Technical report TB261
• UK regulator (ofgem) : “QOS” related standards
 Local work, lessons learnt and experiences
• Eskom Distribution standards
• Distributor licensees
• AMEU role-players
• Customer and industry role-players input
15
16
3. Key Aspects of NRS 048-6 Unpacked
Refer to the final draft standard
(version 4.2) or to the published
paper for the technical details and
additional information
Scope of NRS 048-6
7. Performance
reporting
requirements
6. Data and
change
management
5. Interruption
cause code
categories
17
8. Implementation
1. Interruption
performance
requirements
NRS 048-6
standard
2. Interruption
categories for
reporting
4. Event data
auditing and
validation
3. Definition for
performance
indices
It is recognised that NRS 048-6 may not be practically and financially possible
currently for some licensees and is a long term objective for the effective
management of MV network interruption performance in South Africa
Key Concepts Introduced
 Interruption categories for reporting
• Unplanned (“U”)
• Planned (“P”)
• Customer related (“C”)
• Intake supply (“S’)
 Customer network link (CNL) and end state levels
• Data connectivity model (HV, MV and LV)
• % data accuracy and completeness levels
 Re-interruptions and criteria for counting
• Definition and strict application criteria
• Comprehensive explanatory notes
18
Key Concepts Introduced Cont.
19
 Pre-arranged events for planned interruptions
• Treatment and counting of planned and co-ordinated
interruptions for reporting
 Generic customer categories
• Broad and generic customer category descriptions
• Long term (forward looking) regulatory requirements
 Classification and reporting of major events
• Criteria A : national comparison of licensees
• Criteria B : year-on-year licensee
performance comparison and tracking
• Criteria C : internal licensee reporting
Key Concepts Introduced Cont..
 Accuracy reporting estimation methodology
• Method to audit and estimate the accuracy of the


reported performance measures by licensees
• “Gatekeeper” to ensure the accuracy and integrity
Data and change management (software)
• Requirements for data archiving
• Requirements for tracking any system changes
Different types of licensee reporting
• Annual power quality reporting
• Future incentive based (IBR) reporting
• Reporting for benchmarking purposes
20
21
4. The Way Forward
Implementation
 Solid future framework for EDI
 4 to 7 years business plan, in order
to be completely implemented by
the licensees
 Some licensees may not meet the
current requirements and may
require selective exemptions
 Resource and financial constraints
that need to be managed
 Open invitation for any assistance
(011) 871 2355
[email protected]
22
Electricity Service Delivery - “The Challenge”
The challenge is now for the distributor licensees
to implement the NRS 048-6 standard and start
improving their electricity service delivery –
reliability and availability of electricity supply.
23
24