sustainable electric networks and sourcesof energy … flow calculation for all branches n, 2, dso...

1www.sense.tu-berlin.de

Tokyo, 8 June 2017Professor Dr.-Ing. Kai StrunzSmart Community Summit

Chair ofSustainable Electric Networks

and Sources of Energy

Project SuSTAINABLEand Emerging Energy System Topics in Europe

Professor Dr.-Ing. Kai StrunzTU Berlin, Germany

NEDO Smart Community Summit 2017

Tokyo, 8 June 2017



1. Introduction

2. Project e-Highway2050

3. Project SuSTAINABLE

4. Conclusions

Overview



1. Introduction: Energy Union Strategy of European Union

• In 2015, the Energy Union strategy was announced

• It relies on five important pillars set to support the EU’s targets on energy and climate:o Supply security: more diverse sources and better use of energy produced in

the European Union (EU)o Full energy market integration: interconnectors for free cross-EU power flowso Energy efficiency: less energy consumption and less importso Decarbonization: take action on the climate and reduce emission o Supportive research and innovation: breakthrough low-carbon solutions

• For 2050, the EU targets call for 80 % to 95 % reductions of CO2 emissions



2. Project e-Highway2050: Fast Facts

• Full title: Modular Development Plan of the Pan-European Transmission System 2050

• Duration: 40 months(Sep 2012 - Dec 2015)

• Budget: 13 M€



2. Project e-Highway2050: Partners



2. Project e-Highway2050: Project Objectives

• Developing methodology for planning European electricity transmission at very long-term horizon

• Using methodology for first version of transmission network 2050 consistent with EU climate and energy policy

• Creating a consensus-oriented modular pathway of expansion from 2030 to 2050

• Performing technical, socio-economical, and environmental assessments of transmission grid extensions

• Offering wide transparency on grid planning process



2. Project e-Highway2050: European Cluster Model †

• For resource allocation in scenarios, EU was decomposed into cluster of 100 zones

• This gives the geographical dimension

• Transmission grid counts about 8000 nodes

• The 8000 nodes were mapped onto those 100 zones

• For better focus and insight, only inter-zone transmission corridors considered for the long-term planning

• At this large a horizon, uncertainties are too large to account for details at substation level

† Europe’s Future Secure and Sustainable Electricity Infrastructure: e-Highway2050 Project Results; published by RTE, November 2015



ScenarioBig & market

ScenarioFossil & nuclear

ScenarioLarge scale RES

ScenarioSmall & local

Scenario100 % RES

• Specific grid model was obtained for each of the 5 scenarios

• Grid expansion is mainly driven by the deployment of Renewable Energy Systems (RES)

• Grid reinforcements are beneficial in the respective scenarios

• Public acceptance taken into account by considering overhead lines and underground cables

2. Project e-Highway2050: Grid Modeling Results†

† T. Anderski et al.: “Grid Development for Long Term Planning”, e-Highway2050 Final Conference, Brussels, November 4th 2015



00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00June 23rd 2040

Renewable generation in Scenario 100 % RES

2. Project e-Highway2050: Power Flow Results



3. Project SuSTAINABLE: Fast Facts

• Full title:Smart Distribution System Operation for Maximizing the Integration of Renewable Generation

• Duration: 3 years(Jan 2013 - Dec 2015)

• Budget: 6 M€



• 8 partners from 5 different EU countries• 2 distribution system operators

• 1 manufacturer

• 5 universities

• 7 Advisory Board Members from industry, universities and TSOs

3. Project SuSTAINABLE: Partners



3. Project SuSTAINABLE: Demonstration Site Inovgrid

• Located in city of Evora

• 54.000 inhabitants with 30.000 electricity consumers

• 1.307 km2 of urban and rural area



3. Project SuSTAINABLE: Videohttps://www.youtube.com/watch?v=lFcLBjh0RqY&feature=youtu.be



• Making electricity distribution grids more predictable, observable, controllable allowing higher integration of renewables and Distributed Energy Resources (DER):

o Forecasting of renewables and load in networkso Grid monitoring and state estimationo Voltage and power quality control at medium and low voltage levels with

fluctuating renewables

3. Project SuSTAINABLE: Project Objectives

• Designing interactions of stakeholders including aggregators in electricity markets

• Validating and implementing solutions in laboratory and field



3. Project SuSTAINABLE: Service-Centric Aggregator Motivation

• DER cannot directly bid into market due to their relatively small sizes

• In SuSTAINABLE, an aggregator to address these issues through dedicated services was designed

• Aggregator groups and coordinates various DER units

• Furthermore, curtailments of renewable generation in distribution networks have risen dramatically

• Aggregator acts on behalf of this pool of controllable dispersed generators, storage, and loads



• Role 1: Energy market participation service to resources

• Role 2: Congestion relief service to DSO

3. Project SuSTAINABLE: Service-Centric Aggregator Dual Roles

DSO

Energy market

Service-centric aggregator offers two roles on behalf of its pool:



• Day-ahead operation: stochastic optimization with the objective to minimize operational cost for the pool

• Intraday operation: deterministic optimization to minimize operational cost and minimize imbalances from updated forecasts

• In intraday operation, rolling horizon approach is followed:

3. Project SuSTAINABLE: Service-Centric Aggregator Role 1: Access to Day-ahead and Intraday Energy Markets

Send bid

Schedulinghorizon

Market processing

Send bid



3. Project SuSTAINABLE: Service-Centric Aggregator Role 1: Sequence Diagram



Aggregator controls resources on the illustrated network[1] and other locations

[1] CIGRE Task Force C6.04.02, ”Developing Benchmark Models for Integrating Distributed Energy Resources,” 2014

Resources at other

locations

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Accounting for Network Constraints

2

3

4

5

6

7

8

9

10

11

12110/20 kV 110/20 kV

13

14

S2

S3

S1

LoadTransformerBus

1

Switch/CBPV

Wind park

Electrical storage

CHP unit

CHP CHP Th

Thermal storage

Th

CHP

Th



Scheduling

Aggregator

Power flow calculationfor all branches , ,

DSO

Start

End

Yes

No

Reconfiguration

DSO

Calculation of percentage giving how change of generation

impacts change of flow

Calculation of desiredmodification of flow ∆ ,

Aggregator

Rescheduling

New schedules

No, ,

, ,

Yes

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Flowchart of Congestion Relief Service to DSO





3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Technical Validation of Schedules

Scheduling

Aggregator


DSO

Start

End

Yes

No

Reconfiguration

DSOCalculation of desired

modification of flow ∆ ,

Aggregator

Rescheduling

New schedules

No, ,

, ,

Yes



2

3

4

5

6

7

8

9

10

11

12110/20 kV 110/20 kV

13

14

S2

S3

S1

LoadTransformerBus

1

Switch/CBPV

Wind park

Electrical storage

CHP unit

CHP CHP Th

Thermal storage

Th

CHP

Th

• Aggregator calculates schedules and sends them to the DSO

Time Branch Congestion (MW)09:15-09:30 3-2 0,8

DSO

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Technical Validation of Schedules

• Power flow calculation of DSOindicates congestion at 09:15 on branch 3-2





3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Network Reconfiguration Action

Scheduling

Aggregator


DSO

Start

End

Yes

No

Reconfiguration



Aggregator

Rescheduling

New schedules

No, ,

, ,

Yes



2

3

4

5

6

7

8

9

10

11

12110/20 kV 110/20 kV

13

14

S2

S3

S1

LoadTransformerBus

1

Switch/CBPV

Wind park

Electrical storage

CHP unit

CHP CHP Th

Thermal storage

Th

CHP

Th

• DSO attempts to reconfigure the network by switching S1

• Switching creates overload on branches 14-13 and 13-12 due to high wind power generation on bus 14

DSO

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Network Reconfiguration Action



3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Preparing Request for Congestion Relief

Scheduling

Aggregator


DSO

Start

End

Yes

No

Reconfiguration



Aggregator

Rescheduling

New schedules

No, ,

, ,

Yes





2

3

4

5

6

7

8

9

10

11

12110/20 kV 110/20 kV

13

14

S2

S3

S1

LoadTransformerBus

1

Switch/CBPV

Wind park

Electrical storage

CHP unit

CHP CHP Th

Thermal storage

Th

CHP

Th

• Flow on line 3-2 to be reduced by 0,8 MW

∆ , 0,8MW

91%

91%

90%

90%

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Preparing Request for Congestion Relief

DSO

• Changes of generation at buses 4, 5, 8, 10 have a high impact on flowof congested line





3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Aggregator Rescheduling Action

Scheduling

Aggregator


DSO

Start

End

Yes

No

Reconfiguration



Aggregator

Rescheduling

New schedules

No, ,

, ,

Yes



2

3

4

5

6

7

8

9

10

11

12110/20 kV 110/20 kV

13

14

S2

S3

S1

LoadTransformerBus

1

Switch/CBPV

Wind park

Electrical storage

CHP unit

CHP CHP Th

Thermal storage

Th

CHP

Th

• Aggregator adjusts the schedules of its resources and sends the adjusted schedules to the DSO

DSO

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Aggregator Rescheduling Action

• DSO repeats power flow calculation for verification



2

3

4

5

6

7

8

9

10

11

12110/20 kV 110/20 kV

13

14

S2

S3

S1

LoadTransformerBus

1

Switch/CBPV

Wind park

Electrical storage

CHP unit

CHP CHP Th

Thermal storage

Th

CHP

Th

Congestion relieved without curtailment of renewables

DSO

3. Project SuSTAINABLE: Service-Centric AggregatorRole 2: Successful Congestion Relief



3. Project SuSTAINABLE: Laboratory Validation at TU Berlin



3. Project SuSTAINABLE: Field Validation in Evora, Portugal

DTC



• The concept of a service-centric aggregator that cooperates with the distribution system operator shows to:

o Support the market integration of distributed energy resourceso Increase the share of renewable power generationo Contribute to secure system operation through the provision of a

coordinated congestion management service

3. Project SuSTAINABLE: Observations

• With many more functions, SuSTAINABLE laid foundations for shift to new operation paradigm in the operation of distribution networks

• The functionalities were validated and their added value was verified



4. Conclusions• Cooperative projects play an important role in supporting energy transformation

Thank you

• Project SuSTAINABLE is an excellent role model

• The SuSTAINABLE team appreciates the opportunity of the exchange with NEDO

sustainable electric networks and sourcesof energy … flow calculation for all branches n, 2, dso...

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