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The Regulatory Assistance Project 50 State Street, Suite 3Montpelier, VT 05602
Phone: 802-223-8199www.raponline.org
Smart Rate Designfor a Smart Future
August 4, 2015
Jim Lazar, Senior Advisor, RAPWilson Gonzalez, Treehouse Energy and Economic Consulting
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Housekeeping
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Please submit questions through the Questions pane.
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Our Rate Design Experts
Jim Lazar RAP Senior Advisor
Wilson Gonzalez, TreehouseEnergy and Economic Consulting
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Three Guiding Principles
• A customer should be able to connect to the grid for no more than the cost of connecting to the grid.
• Customers should pay for power supply and grid services based on how much they use and when they use it.
• Customers supplying power to the grid should receive full and fair compensation – no more and no less.
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Principle #1
A customer should be allowed to connect to the grid for no more than the cost of connecting to the grid.
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Principle #2
Customers should pay for the grid in proportion to how much they use the grid, and when they use the grid.
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Principle #2
Customers should pay for power supply in proportion to how much they use and when they use it.
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Principle #3
Customers delivering power to the grid should receive full and fair value –- no more and no less.
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Boiling It Down To Rate Design
Rate Element Amount
Billing and Collection $4.00/month
Transformer Demand Charge $1.00/kVA/month
Power Supply and Distribution (both directions)
Off-Peak $.07/kWh
Mid-Peak $.10/kWh
On-Peak $.15/kWh
Critical Periods $.75/kWh
Costs to Connect to the Grid
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Where Did The Idea that High
Fixed Charges are Appropriate Come
From?
Pro Forma Results of Operations by Customer Group
ELECTRIC COST OF SERVICE STUDY FLOWCHART
TransmissionProductionCommon
Energy /
Commodity
Related
Customer
Related
Demand /
Capacity Related
Residential Small General Large General Extra Large
General
Pumping Street & Area
Lights
Allocation
Pro Forma
Results of
Operations
Functionalization
Distribution and
Customer
Relations
Classification
Direct Assignment
Number of Customers
Weighted Number of
Customers
Direct Assignment
Coincident Peak
Non-Coincident Peak
Direct Assignment
Generation Level mWh's
Customer Level mWh's
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Straight Fixed / Variable:
100% ofDistribution
System Classified as Customer-
related
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Minimum System
Method:
~50% ofDistribution
System Classified as Customer-
related
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Basic Customer Method
ONLY customer-
specific facilities
classified as customer-
related
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Comparing Methods
Cost Category
Straight
Fixed /
Variable
Minimum
System
Method
Basic
Customer
Method
Poles $10 $5 -$
Wires $20 $10 -$
Transformers $10 $5 -$
Services $1 $1 $1
Meters $1 $1 $1
Billing $2 $2 $1
Customer Service $2 $2 $1
Total $46 $26 $4
$/month/customer
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What About Other Industries?
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Paying On The Basis of Usage
Off-PeakBaseload Generation,
Transmission, Distribution
Mid-PeakIntermediate Generation,
Transmission, Distribution
On-PeakPeaking Generation,
Distribution
Critical Peak Demand Response
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Issues With Home-Grown Electricity
Source: Crossborder Energy / VoteSolar
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All Kilowatt-Hours Are Not Equal
Local Organic
Tomatoes $3.00/lb.
California Tomatoes
$2.00lb.
We Buy Local Organic Tomatoes: $2.00lb.
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Utility Average Cost
of Service Retail Rates
Traditional Ratemaking View
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Lost Revenues from
Net Metering
Short-run Fuel and Purchased Power
Costs Avoided By Net Metering
Critical View of Net Metering
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Solar Advocate View of Net Metering
Lost Revenues From Net Metering
Long-Run Avoided Cost for Generation, Trans, Dist+ Reduced Emissions+ Avoided Fuel Cost Risk+ Avoided Fuel Supply Risk+ Local Economic Development+ Future Carbon Costs+ Shading Benefits on AC Load+ Much, much more
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Utility Average Cost of Service
Long-Run Avoided Cost for Generation, Trans, Dist+ Avoided Emission Cost+ Avoided RPS Obligation+ Avoided Fuel Cost Risk+ Avoided Fuel Supply Risk
Balanced Net Metering View
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$0.090
$0.138 $0.135
$0.107$0.115
$0.00
$0.04
$0.08
$0.12
$0.16
MaineShort-Run
MaineLong-Run
Minnesota Austin Averageper-kWh
Rate
Value of Solar Studies: Utility Economic Values Only
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Clarifying Questions?
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Please submit questions through the Questions pane.
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Empowering Smart Technology
New technologies can minimize total system costs and increase system reliability
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Electric Vehicles
• Source of on-peak power (V2G)
• Market for off-peak power
• Provide multiple ancillary services
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Path to Smart Electric Future
1. Need Cost-Effective Deployment of Smart Meters/Smart Grid
2. Need development of smart rate designs
3. Need adoption of enabling technology to facilitate transition
28Warner Brothers, 1939
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1. Smart Meters/Smart Grid
Enable granular data acquisition, equipment control and communications between the
customer and the grid
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Smart Meters/Distributed Generation
Track power flows of DG (PV’s) in both directions on interval basis to determine accurate billing (and value transactions)
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2. Implementing Smart Rates
Need smart rates to unleash this technology
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Types of RatesRate Type Description Customer
Risk/Reward
Smart Meter
Single Average Traditional rate where all hours consumed are
charged the same rate.None Not needed
Seasonal Traditional rate that varies depending on the
season, usually summer rates are higher for a
summer peaking utility.
Low Not needed
Inverted Rates vary depending on the level of
consumption blocks. Usually the first 500 kWh
are cheaper with additional consumption leading
to higher rates.
Low to medium
depending on
consumption
level
Not needed
Peak Time Rebate (PTR) Traditional rate with the customer option of
curtailing use when utility signals a “peak event
day.”
No Risk,
opportunity for
reward
Yes
Time of Use (TOU) Rates vary by the time of day, with the lowest
rate being off-peak, and shoulder and peak
blocks being charged higher.
Medium risk and
reward
Yes
Critical Peak Pricing (CPP) Rates are significantly higher during the period
when a utility calls a “peak event.”Higher risks and
reward
Yes
Variable Peak Pricing
(VPP)
Hybrid of time-of-use and real-time pricing
where different periods for pricing are defined in
advance, but peak pricing based on utility and
market conditions.
Very High Yes
Real Time Pricing (RTP) Rate can vary on an hourly basis. Highest Yes32
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Smart Rates Can Reduce Total System Costs & Customer Bills
Smart rates can produce significant peak load reductions and shift energy consumption
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3. Enabling Technology
Rates work best with enabling technology
– “Set and Forget”
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Enabling Technology
A recent US DOE study reports that “average peak demand reductions for customers taking service on critical peak pricing (CPP) rates were almost twice the size (21 percent) than they were for customers participating in critical peak rebate (CPR) programs (11 percent).”
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Enabling Technology
“However, when automated controls were provided, peak demand reductions were about the same (30 percent for CPP and 29 percent for CPR).”
• See: US DOE. (2015). Interim Report on Customer Acceptance Retention, and Response to Time-Based Rates from the Consumer Behavior Studies.
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Smart Rates and Consumer Protections
• Incorporating Consumer Protections important during roll-out of smart rates
– Customer education
– Shadow billing
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Smart Rate & Consumer Protections
– “Hold harmless”& bill forgiveness provisions (1 yr.)
– Customers placed on tariffs that usage history determine will lead to lowest bills
– Continue low income programs (Rate discounts, PIPP, usage based discounts, etc.) for “at risk” populations
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Integrated Distribution Grid Planning
Identify least-cost solutions to system upgrades
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-Ancillary
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Rate Design Recommendations: DG
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State Average
Residential Retail
Electricity Rate
Conventional
Compensation
Method
Level of
Compensation
Based on
Range of Value
of Solar
Studies (VOSS)
Recommended Rate Design Should
Externalities Be
Added to VOSS
for PV
Compensation?
Low Cost Utilities
(<10 cents/kWh)
Net-Metering
(power supply
plus
distribution)
Under
Compensation
Zero Customer Charge and Inclining
Rate Design (or time varying rate) to
Conventional net-metering
State by State
Determination
Average Cost State
(10-20 cents/kWh)
Net-Metering
(power supply
plus
distribution)
Fair
Compensation
Low Customer Charge and
Conventional net-metering
State by State
Determination
High Cost State
(>20 cents/kWh)
Net-Metering
(power supply
only)
Over
Compensation
Time varying prices for power supply
& distribution services. Pays full retail
rate when taking power from the grid.
Receives just power supply cost (no
distribution) when supplying power to
grid. Bi-directional Meter needed.
State by State
Determination
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Perspective on DG Cross-subsidy Issue
• PV cost recovery responsibility to other customers unfairly characterized as a cross-subsidy– Cost-allocations among customers and customer
classes dynamic and reflect changing circumstances
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Utility Revenue Deficiency Options
• Revenue Decoupling Mechanisms
• Performance Based Ratemaking
• Rate of Return adjustment for increased risk
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Policies to Complement Smart Future
• Adopt time-varying and dynamic rate designs
• Revenue regulation to ensure that utilities have a reasonable opportunity to earn a fair return
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Policies to Complement Smart Future
• State building codes upgraded to require residential EMS
• DG to install smart inverters
• Federal Appliance Standards to require control technologies to adjust for changing prices
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“Not So Smart” Future
• Flat Rate
• SFV
• Discriminatory charges to PV customers
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Q & A
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Summary
• Three guiding principles
• High fixed charges are improper
• Time-varying pricing is desirable
• Technology enhancement is important
• Value of Solar may exceed retail rates
• DG customers can provide grid services
• Customer protections are important
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About RAP
The Regulatory Assistance Project (RAP) is a global, non-profit team of experts that focuses on the long-term economic and environmental sustainability of the power and natural gas sectors. RAP has deep expertise in regulatory and market policies that:
Promote economic efficiency Protect the environment Ensure system reliability Allocate system benefits fairly among all consumers
Learn more about RAP at www.raponline.org
Jim Lazar [email protected]
Wilson Gonzalez [email protected]