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TRANSCRIPT
TEPCO Initiatives to Integrate
Renewable Energy Resources
into the Electricity Market
Hiroshi Okamoto, Ph.D.
Managing Executive Officer
Tokyo Electric Power Company
Outline
1. Electricity Market Reform in Japan and
TEPCO’s Activities
2. Challenges for Integrating Renewable
Energy into the Electricity Market
3. Subjects to be Addressed and Our
Perspective
Electric Power System : Platform of the Electricity Market
Wholesale Transmission & Distribution Retail
Generation Transmission DistributionCustomers’
Facility
Electric power system is a market place platform which matches consumptions and generations of electricity via electric power network.
TEPCO Holdings
TEPCO
Fuel and Power Co.
TEPCO
Power Grid Co.
TEPCO
Energy Partner Co.
Restructuring of Corporate Structure of TEPCO
As of April 1st 2016
Balancing Mechanism after the Market Reform
Generation
Retail
Energy
Transaction
every 30 min
Bilateral /
Spot Market
Adjustment
Adjustment
Power Pool of TEPCO Control
Area
Operator of Power Pool Responsible for
Balancing and Congestion Management
TEPCO Power Grid
Generation
5
Strengthening the Energy Value Chain
T&DDistributedGeneration
Customer
Streamlining and Optimizationof the Assets and Operation
Growth in LowCarbon Assets
Consolidation of Upstream
OverseasBusiness
Energy Efficiency,Energy Management
O&M and Finance
Innovative Servicesfor Productivity
Combined with IoT
Flexibility for Balancing and Optimization
IntegratedGrid
Platform
Three Issues of Renewables Integration into the Market
1. Flexibility Resource to Accommodate
Variable Renewables
2. T&D Network Capacity Enhancement and
Congestion Management
3. Economy of Renewables
可変速揚水発電設備の外観
Pumped hydro can store/generate the electricity
to minimize the gap between renewable energy
output and demand.
Pumped hydro is one of the major flexibility
resources to integrate more renewables in
Japan.
Pumped Hydro Power Storage for Flexibility Enhancement 7
Flexibility Provided by Pumped Hydro Storage
Operation
ベースロード電源
風力
太陽光
火力電源(最低出力)
揚水の活用による調整
再エネの出力抑制
火力の下げ代
(揚水発電)
需要
(揚水動力)
(揚水動力)
再エネ導入量
抑制時間
揚水なし当社揚水全台活用
揚水発電の活用により再エネ統合拡大
Renewables
Curtailment
Without Pumped
With Pumped
RES CurtailmentStorage Operation
Minimum Output of Fossil Power
and Baseload Generation
Wind
PV
Overview of Pumped
Hydro Facility
De
ma
nd Flexibility
provided by
fossil power
8
Advanced Technologies Needed for Flexibility Enhancement
(National Project funded by NEDO)
Variable
Output
RES
(Renewable Energy Sources)
Wide-Area coordination
Forecast & Estimation
Reduction
Control
Generation Resources
Central Load Dispatching Office Control
On-line and Real-time Control
Control Area B
DR Resources
Battery・EV
・HP, etc
Smart Meter
Online Telemetries,Regulation Signals
Control
Control
Forecast &Estimation
Control
OCCTO*
Control Area A
-utilization of the pumping storages
-enhancing the flexibility of control
of thermal power generators
generation side
demand side
・RES energy output (MWh)
・fluctuation characteristics(long/short time horizon)
D-1, 15~30min ahead, or real-time reduction
*Organization for Cross-area Coordination of Transmission Operators
Multi-area Coordination of Flexibility Resources
Multilateral TSO-TSO coordination will maximize flexibility of the grid to accommodate further variable RES.
Inter-area ancillary service market is needed to procure and provide flexibility
ΔPT
Thermal
Thermal
Hydro
Thermal
0
MAX
(i)RES increase
(ii) distribute
RES increase
in each area
Central dispatch center
(TSO B)
Area A
Inter regional tie line
Area B
regulate0
MAX
(iii) regulate
(decrease output)
OCCTO
Hydro
Wind
0
MAX
(iii) regulate
(decrease output)
regulate
Central dispatch center
(TSO A)Provide the flexibility
Procure and pay for the flexibility
Sustainability of Flexible Resources
Installed Capacity (MW)
Pric
e($
/MW
h)
Pric
e($
/MW
h)
Without the RES integration
With the RES integration
(Ref) IEA GIVAR Report Fig 2.1
RES
It will be difficult to maintain GTCC providing flexibility because of decrease
in market clearing price and capacity factor of the unit. Capacity mechanism
will be needed to recover the fixed cost of the flexibility resources.
Concluding Remarks and Our Perspective
Flexibility enhancement and transmission/distribution capacity
enhancement or allocation will be needed to integrate the further
renewable resources.
The market-based and cost-effective measures will be desired.
1. Inter-regional flexibility procurement/provision through ancillary
service market.
2. Market-based allocation of the transmission capacity
The following issues should be addressed.
1. Cost allocation mechanism given the desired future energy mix.
2. Demand side measures for decreasing CO2 and increasing
flexibility (e.g. Electric Vehicle, Heat Pump Hot Water Server)
3. Sustainability of the enterprise providing the flexibility resources
12Towards a Digital Utility through Three Layers of Value Chain