The Measurement and Verification Guidelines for Eskom DemandSide Management Projects

1
The Measurement and Verification Guidelines for
Eskom Demand-Side Management Projects

• Presenter C.A. van der Merwe (CEM, CMVP)
• Co-Authors Dr. W den Heijer (CEM, CMVP)
• Prof. LJ Grobler (CEM, CMVP)
• Measurement Verification Workshop
• October, 2007

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Presentation Outline

• Introduction on DSM
• Measurement and Verification
• DSM and MV project stages
• MV Rationale
• Determining DSM impacts
• Standardised MV approaches
• Summary
• Discussion

3
Matching Supply and Demand
4
DSM Options
Consumption
5
Opportunities for DSM

• Residential
• Efficient lighting initiative
• Residential hot water load control
• Insulation of houses
• Commercial
• Energy efficiency and load management
• Efficient lighting, air conditioning and water
  heating
• Mining / Industrial
• Process improvements
• Efficient equipment (e.g. Motors, Pumps)
• Load control systems in conjunction with dynamic
  pricing signals

6
MV Requirements

• MV must be able to quantify impacts on a
• Project level
• Regional level
• National level
• Technology level
• The following stakeholders need to know what are
  being achieved
• Eskom (Project, Regional, National, Technology)
• NER (Project, Regional, National, Technology)
• Government (Regional, National, Technology)
• ESCo (Project)
• Client (Project)

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Background on MV

• Based on available International MV protocols
• 2000 International Performance Measurement and
  Verification Protocol (IPMVP)
• Measurement and Verification for Federal Energy
  Project Guideline (FEMP)
• A MV methodology was developed for the South
  African situation
• MV processes streamlined and focused on project
  specific situations
• MV implementation on various levels of
  complexity and effort
• Basis of successful energy efficiency and
  demand-side management projects rest on the fact
  electricity reductions can be determined to a
  degree of accuracy and trust that is acceptable
  to all stakeholders.
• Objectives of MV
• Impartial, Credible, Transparent, Quantify and
  assess project impacts and assess sustainability

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MV Interaction

• MV Stakeholders
• Eskom
• ESCo
• Client
• Task of saving assessment and quantification need
  to be performed by a party outside the group of
  principal project stakeholders.
• MV team is active on all the levels between the
  various project stakeholders.

How much have been saved and are the savings
being sustained?
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The Benefits of Effective MV

• Quantify assess savings and various impacts
• Impartial of stakeholders
• Enable Tracking and Evaluation (TE) of DSM
  project performance and progress
• Help to identify focus areas for DSM activities
• Identify potential problems in DSM implementation
• Evaluate DSM impacts against targets
• Help with proper implementation of DSM
• Encourage investment in projects
• Help to manage risk for stakeholders

10
DSM Project Stages
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MV Project Stages
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Sign-off Procedures

• Applicable to
• MV plan,
• Baseline report, and
• Performance Certificate.
• Acknowledge receipt of a report when sent by MV.
• Feedback period for comments on submitted report
  is two weeks.
• No feedback will be considered as acceptance of
  particular report.
• Both ESCo and Client need to agree on particular
  report.
• An e-mail stating agreement will be treated as
  proof of acceptance of a report and its contents.
• Copy all stakeholders in these communications.

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DSM and MV Project Interaction
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Requirements to Perform MV Successfully

• MV needs access to the site where the DSM
  Project will be / has been implemented as well as
  to places where the effects of the DSM Project
  may be felt.
• Control on calorifier (DSM project) may result in
  cold water at showers (effect).
• MV needs access to all available and relevant
  data and information of the DSM project.
• DSM Proposal, DSM target page in DSM contract,
  Bills, production, of lights, Scada data,
  historian data, operations, planned
  alterations...
• Any project-specific information.
• Each MV Team has entered into a non-disclosure
  agreement with Eskom.

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MV Rationale
Energy savings (Baseline energy use)
(Post-implementation energy use)
Adjustments
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MV Rationale

• Must represent energy demand and consumption for
  system as it was operational and sustained prior
  to the DSM intervention.
• Must be accurate, dynamic, transparent,
  acceptable to stakeholders.

17
MV Boundaries

• The results of the MV activities will only
  consider effects of the DSM Project activity
  within the defined boundaries.
• Boundaries are related to what was agreed upon in
  the DSM Contract.
• Contracted lighting load reduction of X MW. MV
  will therefore exclude any HVAC off-spins due to
  reduce lighting heat load.
• A change in boundaries will necessitate an
  adjustment of the baseline.

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Baseline Adjustments

• Service Level Adjustment

• Baseline Adjustment

• Routine adjustments.
• Normal operational changes.
• Cyclic, seasonal.
• Referenced to facility output such as production
  or raw material input...

• Non-Routine Adjustment.
• Abnormal, once-off operational changes.
• When change occur.
• No reference to cyclic variables.

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Impact of DSM
Pre DSM Baseline
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Daily Electricity Consumption vs. Daily Water
Sales
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What about Load Growth?
22
Baseline Correlation
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Project Performance Responsibilities

• After ESCo implemented DSM measures
• Eskom DSM issue Certificate of Completion
• Project enters Performance Assessment phase
• MV quantifies whether DSM project is delivering
  intended MWs
• ESCo is responsible for performance
• Once project has demonstrated that it can
  deliver, responsibility is transferred to Client
• Client is responsible for maintaining and
  sustaining DSM performance
• Client now carries the responsibility

24
Standardised MV Approaches
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Time intervals (Backward filling vs. Forward
filling)

• Backward filling
• 0730 means the time between 0700 and 0730
• Day start 0030
• Day end 0000
• Non-standardised approach during MV and DSM
  projects!

• Forward filling
• 0730 means the time between 0730 and 0800
• Day start 0000
• Day end 2330
• Standardised approach during MV and DSM projects!

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How kW is measured for MV?
30-min integrated load 60 MW
30-min integrated load 70 MW
Instantaneous load
80 MW
Instantaneous load 70 MW
30-min integrated load (used by MV)
70 MW
60 MW
Demand (MW)
50 MW
Instantaneous load 55 MW
30-min integrated consumption 30 MWh
30-min integrated consumption 35 MWh
40 MW
60-min integrated consumption 65 MWh
30-min interval 1
30-min interval 2
Time (30-min interval)
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Determining impacts per Time-of-use period
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Project Type Commercial Lighting
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Project Type Industrial / Warehouse Lighting
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Project Type Street Lighting
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Project Type Load Shifting
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Project Type Residential Load Management
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Determine Combined Impact
Overall Picture Pre-Implementation
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Determine Combined Impact
Overall Picture Post-Implementation
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Combined Impact
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Combined Results
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MV Performance Tracking
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Impact History
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Reporting MV Impacts (MW MWh) Latest month
Demand (MW)
Consumption (MWh)
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Reporting MV Impacts (MW MWh) Since completion
Demand (MW)
Consumption (MWh)
41
Reporting MV Impacts (MW MWh) Current
financial year
Demand (MW)
Consumption (MWh)
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Projects with Seasonal impacts

• Typically found on industrial fridge plants and
  HVAC systems
• Projects with different contracted targets for
  Winter and Summer
• Single weighted target for year
• Separate targets for winter and summer
• Projects with contracted target only for winter
  or summer
• MV only during applicable period
• No annual results

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Summary

• MV Results reported to Eskom, NER, Government,
  ESCo and Clients
• MV must provide results on Project-, Regional-,
  National- and Technology levels
• Baselines must be developed to provide reference
  points in 30-min intervals for various TOU
  periods
• Impacts must be determined in 30-min intervals
  for each of the various TOU periods
• Impacts integrated per TOU period
• Above must be done for both load management and
  energy efficiency projects

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Discussion
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For More Information
Prof. LJ Grobler Cell 082 452 9279 Tel (018)
299 1328 Fax [phone] Email LJ.Grobler_at_nw
u.ac.za
CA van der Merwe Cell 082 440 8420 Tel (018)
297 5904 Fax [phone] Email VanDerMerwe.Ch
risto_at_nwu.ac.za