Sectoral Models for Energy and Climate Policies - World...
Transcript of Sectoral Models for Energy and Climate Policies - World...
Govinda R. Timilsina The World Bank, Washington, DC
Skopje, Macedonia
March 1, 2011
Sectoral Models for Energy and Climate Policies
Presentation Outline
► Introduction
► Typology of models
► Energy Demand Models
► Energy supply models
► Energy system models
Introduction
Energy modelling has a long history (Since the early 1970s, a wide variety of models became available for analysing
energy systems or sub-systems, such as the power system)
Energy modelling has multiple purposes (Better understanding of current and future markets – supply, demand, prices;
facilitating a better design of energy supply systems in short, medium and long term; ensuring sustainable exploitation of scarce energy resources; understanding of the present and future interactions energy and the rest of the economy; understanding of the potential implications to environmental quality)
Based on different theoretical foundations (Engineering, economics, operations research, and management science)
Apply different techniques (Linear programming, econometrics, scenario analysis)
Classifying Energy Models
Energy Model
Model for energy market forecast
Energy demand model
End-use accounting model
Econometric model
Energy supply model
Optimization model
Simulation model
Energy system model
Model for energy – economic interaction
Input-Output model
General equilibrium model
Methodologies
for Energy Demand
Forecasting
Methodologies for Energy Demand Forecasting
End-use Approach
Bottom-up or engineering approach
Use physical or engineering
relationship between energy and
energy utilizing devices and
processes (e.g., capacity, efficiency,
utilization rate)
Follows growth of driving variables
(i.e., devices and processes), which
are derived often scenario analysis
or economic models
Could produce more disaggregated
(i.e., end-use and sector) and the
forecasts are relatively precise
Complex and data consuming;
more appropriate for long-term
Econometric Approach
Econometric approach
Use historically established
relationships between energy
demand and economic variables
(e.g., GDP, population, household
income)
Follows growth of driving variables
(i.e., economic variables)
Estimation are made at more
aggregated level or at sectoral level
but not at end-use level
Simple but relatively less accurate;
more appropriate for short-term
Methodologies for Energy Demand Forecasting
End-use Approach
Normally do not account pricing
effect on demand, which is very
critical when demand for a fuel is
highly elastic
Econometric Approach
This approach normally considers
single fuel or aggregate energy
(gasoline, electricity) and does not
account substitution possibilities
between fuels
Use of flexible functional forms (e.g.,
translog, normalized quadratic ) is
growing
They are unable to account
technology specific features which
are key determinants of fuel
consumption
Comparison of some energy demand
forecasting models
Criteria DTI NEMS MAED/ MEDEE
LEAP POLES
Type Top-Down Hybrid Bottom-up Bottom-up Hybrid
Approach Econometric Accounting
Geography National Flexible Global
Level of disaggregation
Domestic, transport, service, industry Agriculture is also included
Technology coverage
Renewable and conventional
Both conventional and renewable
Data need Time series and survey
Energy Supply
Models
Energy Supply Models
These models either stand alone (e.g., MARKAL,
WASP) or serve as a module of a energy system model
(e.g., electricity market module, coal market module in
US NEMS model)
Demand forecasts, energy resources and technologies
characteristics, costs are the key driving variables
Can accommodate any policy instruments or constraints
such as emission constraints
Methodologies for Energy Supply Planning
Optimization
Ensure cost minimization meeting
all constraints such as resource
availability, system reliability,
environmental quality (if desired)
More appropriate when a large
number of supply alternatives are
available
Example: MARKAL, EFOM, WASP
Simulation
Simulates behavior of energy
consumers and producers under
various signals (e.g. price, income
levels)
Forecasts can be sensitive to
starting conditions and behavioral
parameters
Example: ENPEP/BALANCE,
Energy 20/20
Energy Supply Model: MARKAL
MARKAL is a “bottom-up” model with detailed representation of
energy resources and production technologies
It follows the principal of reference energy system and finds a
least cost set of technologies to satisfy end-use energy service
demands and user-specified constraints
MARKAL is found extensively used for both academic and
consulting studies
The MARKAL Energy PerspectiveThe MARKAL Energy Perspective
Industry, e.g.
-Process steam
-Motive power
Services, e.g.
-Cooling
-Lighting
Households, e.g.
-Space heat
-Refrigeration
Agriculture, e.g.
-Water supply
Transport, e.g.
-Person-km
Demand for
Energy Service
Industry, e.g.
-Steam boilers
-Machinery
Services, e.g.
-Air conditioners
-Light bulbs
Households, e.g.
-Space heaters
-Refrigerators
Agriculture, e.g.
-Irrigation pumps
Transport, e.g.
-Gasoline Car
-Fuel Cell Bus
End-Use
Technologies
Conversion
Technologies
Primary Energy
Supply
Fuel processing
Plants e.g.
-Oil refineries
-Hydrogen prod.
-Ethanol prod.
Power plants e.g.
-Conventional
Fossil Fueled
-Solar
-Wind
-Nuclear
-CCGT
-Fuel Cells
-Combined Heat
and Power
Renewables e.g.
-Biomass
-Hydro
Mining e.g.
-Crude oil
-Natural gas
-Coal
Imports e.g.
-crude oil
-oil products
Exports e.g.
-oil products
-coal
Stock changes
(Final Energy) (Useful Energy)
MARKAL: MARKet
ALlocation)
Developed under the
Energy Technology
Systems Analysis
Program of IEA
Linear programming
type optimization ;
based on Reference
Energy System
Detailed modeling of
energy resources and
supply chains
Includes electricity
generation and
transmission planning
Energy Supply Model: MARKAL
Energy Supply Model: MARKAL
Total OECD Countries = 21
Total Developing Countries = 23
Total Other Countries = 13
Electricity Supply Model: WASP
WASP stands for Wien Automatic System Planning
It was originally developed by the Tennessee Valley Authority
and Oak Ridge National Laboratory of the US for International
Association of Atomic Energy
It is the most well-known and widely used optimization model
for examining medium- to long-term expansion options for
electrical generating systems
The software is distributed for use by electric utilities and
regulation agencies in over 90 countries, as well as to 12
international organizations including The World Bank
Electricity Supply Model: WASP
Countries Using WASP
Energy System Models
Energy System Modeling
Energy system models combine both demand and supply, they can be
also used for:
Energy market projections
Energy policy analysis
Projections of environmental pollution (e.g., GHG, SOx, NOx)
from the energy system and policies for their mitigation
They can employ different methodologies for the demand and supply
blocks (e.g., end-use or econometric for demand and optimization or
simulation for supply)
ENPEP – Optimization for supply; econometric for demand
LEAP uses end-use accounting approach for demand and
simulation approach for supply
NEMS uses optimization modules for the electricity sector and
simulation approaches for each demand sector
Name Developer
NEMS US DOE
ENPEP Argonne National Laboratory
LEAP Stockholm Environmental Institute
TIMES Energy Technology Systems Analysis
Program (ETSAP) of the International Energy
Agency (IEA),
MESSAGE International Institute for Applied Systems
Analysis, Austria
POLES LEPII (formerly IEPE - Institute of Energy
Policy and Economics), Grenoble, France
ENERGY 2020 Systematic Inc. (a US private company)
Energy System Models - Examples
MAED
LOAD
WASP IV
BALANCE
WASP IV
MACRO-E
Capacity
Expansion Plan
Load Dispatching
Electricity
Generation
Fuel
Consumption
Emissions
Emissions
Energy Demand
(excluding
electricity)
- Detailed evaluation of
energy demands by
sector, sub-sector, fuels
and useful energy
- Representation of
resource availability and
costs
-Detailed evaluation of
the power system
configurations
Energy System Model - ENPEP
Energy System Model – US NEMS
The National Energy Modeling System (NEMS) is the tool the Energy
Information Administration (EIA) of the United States has been using since
1994 to project US energy market and to analyze various energy-economic,
environmental and energy security policies
NEMS projects the production, imports, conversion, consumption, and prices
of energy, subject to assumptions on macroeconomic and financial factors,
world energy markets, resource availability and costs, behavioral and
technological choice criteria, cost and performance characteristics of energy
technologies, and demographics
Based on NEMS results the EIA publishes its Annual Energy Outlook every
year; it has also been used for a number of special analyses at the request of
the Administration, U.S. Congress, other offices of DOE and other government
agencies: Energy Market and Economic Impacts of H.R. 2454, the American Clean Energy
and Security Act of 2009, requested by Chairman Henry Waxman and Chairman
Edward Markey
Impacts of a 25-Percent Renewable Electricity Standard as Proposed in the
American Clean Energy and Security Act, requested by Senator Markey
Source: EIA, USDOE (http://www.eia.doe.gov/oiaf/aeo/overview/figure_2.html)
Energy System Model – US NEMS
(Model Structure)
Long Range Energy Alternatives Planning System
Developed by Stockholm Environmental Institute
Scenario-based energy accounting model
It accommodates a Technology and Environmental Database
Energy demands by sectors, sub-sectors end-uses and equipment
Energy transformation sectors included (e.g., electricity, refinery, charcoal)
Energy System Model – LEAP
Energy System Model – LEAP
(Overall Model Structure)
D e m o g r a p h i c sM a c r o -
E c o n o m i c s
D e m a n d
A n a l y s i s
T r a n s f o r m a t i o n
A n a l y s i s
S t a t i s t i c a l
D i f f e r e n c e s
S t o c k
C h a n g e s
R e s o u r c e
A n a l y s i s
In
te
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d C
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A
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nv
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(P
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N o n - E n e r g y S e c t o r
E m i s s i o n s A n a l y s i s
E n v i r o n m e n t a l
E x t e r n a l i t i e s
Energy System Model – LEAP
(Global Application)
MESSAGE stands for Model for Energy Supply Strategy Alternatives and their General Environmental Impact; it is the International Institute for Applied Systems Analysis, Austria
It is a systems engineering optimization model used for medium- to long-term energy system planning, energy policy analysis, and scenario development
It is a scenario-based energy system model; scenarios are developed through minimizing the total systems costs under the constraints imposed on the energy system; this information and other scenario features such as the demand for energy services, the model configures the evolution of the energy system from the base year to the end of the time horizon
Energy System Model – MESSAGE
Energy System Model – MESSAGE
(Overall Model Structure)
Comparison of Selected Energy System Models
Criteria RESGEN EFOM MARKAL TIMES MESAP LEAP
Approach Optimisation Accounting
Geographica
l coverage
Country Local -
national
Country - multi-
country
National Local -
global
Activity
coverage
Energy Energy &
trading
Energy
Sector Pre-defined User defined Pre-defined
Technology Good Extensive
Data need Variable Extensive Variable
Skill
requirement
Limited High Limited
Documentati
on
Limited Good Extensive Good Extensive
Thank You
Govinda R. Timilsina
Sr. Research Economist
Environment & Energy Unit
Development Research Group
The World Bank
1818 H Street, NW
Washington, DC 20433, USA
Tel: 1 202 473 2767
Fax: 1 202 522 1151
E-mail: [email protected]