Jörg Heuer | Siemens AG | München | 04/21/23

Renewable Model Region Harz:Climate Protection and Energy Efficiency by Modern ICT and

Innovative Operation Strategies

Kurt Rohrig, Florian SchlöglEnergy Economy and Grid OperationISET e.V.

Jörg HeuerEmbedded NetworksCorporate TechnologySIEMENS AG

RegModHarz@IEEE_PES09 | Jörg Heuer | Siemens AG | 04/21/23 Seite 2 von 12

Regulation targets stimulation of open Energy Markets

Reduction of carbon footprint requires significant integration of RES

Energy Systems under Change – The Drivers

Unbundling in Energy Systems

Dynamic coordination of volatile RES and DER

ICT for loose coupling and integration of DER

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The German E-Energy Initiative

Main goals of the E-Energy Initiatives● Coordination of DER● Based on ICT for● Extensive use of renewables● System stability and● Market liberalisation

E-Energy Initiative in a nut shell● Funded by the Ministries of economics and ecology● Six Model Regions have been selected● Various, region specific approaches are studied● A launch pad also for E-Mobility

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The Region Harz – An Introduction

„The“ renewable region in Germany● Already today the regions is penetrated by DER (***)● Significant pump storage is available (***)● DER is seen as a significant industry in the region by

the local population and the politicians

System limits are evident ● Power fluctuations is a challenge

for the system stability ● In peak situations the transmission

networks are not capable to transport the generated energy

Quantity PN [MW]

PV 118 (500) 2 (10)

Wind 135 (185) 250 (350)

BHKW 52 (100) 12 (25)

Storage 1 (2) 80 (180)

Household 100 (1000) 0,5 (5)

Industry 20 (40) 100 (200)

Electro vehicles

3 (100) 0,03 (1)

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• Include RES, Loads and Storage

• Coupling by means of market mechanisms and control

• Interface with Grid Operation• Support by massively

distributed ICT systems

RenewableVirtual Power Plant

RESControllable

Loads Storage

Control CommunicationMarket Communication

Approach studied – A Regional Virtual Power Plant

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Operation of RES – Wind Farm Cluster Management

• Coordination of distributed wind farms

• Coordination with the transmission network

• Taking weather information under account

• Already demonstrated by ISET

© by ISET

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Electro Mobility – A Multipurpose Storage System

Integration of eMobility● Manageable load● Manageable storage● Potential: 89% Rush Hour

Integration of Domains● Electrical Grid● Varying Communication NW● Logistics and Driver Info

Practicability in the Project● RegModHerz will be complemented by HarzEE-Mobility● A mobility management system interfacing with the VPP● Integration of eMobility to maximise

use of RES

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System Coupling by Incentives – The Market Place

Market Places● Separation of a regional and a whole sale

market place● Introduction of dynamic pricing on the regional

market place to couple consumption to generation● Raises awareness of fluctuating energy resources● A slow control loop by pricing signals is expected

Bidirectional Energy Management Interface (BEMI)● Price driven automation of device control (e.g. climate control)● External interface based on CIM data models● Internal interface is installation dependent (e.g. KNX)

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System Coupling by Control – The Technical VPP

The ICT Gateway for Energy Management● Enables status monitoring and control of

massively distributed energy systems● External Interface based on IEC61850 and

web services● Unified modelling of DER● Internal interfaces are installation dependent

(e.g. Profibus)

Massively distributed ICT Systems● Have to cope with a statistical loss of control● Not engineerable systems● Support of automatic administration● Have to ensure system stability in stress situations

e.g. by congestion control

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Technical Grid Operation – The VPP Backbone

Status monitoring based on PMUs● Increased precision of balancing● Supports coordination of loads and

generation● Identifies the demand of aux services● Strong requirements on the

communication infrastructure

Joint communication NW and electrical Grid simulations● Based on Netomac and NS2● Enables large scale evaluation● Demonstrates interdependencies

between the networks

PMU

PM

U

PCC 1

PCC 2

PCC 3

PM

U

U, I, f, t

U, I, f, tU, I, f, t

t

P

t

P

Measurments:Measurments:- f global

parameter- U, I local

parameters- t global

time stamp

P,Q

RKWH

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Conclusion and Outlook

Conclusion● ICT to loosely couple DER and RES aiming strategic triple● For coupling market and control communication is deployed● Fundamental challenge is the complexity

of a massively distributed VPP

Outlook ● Lab Tests by Q2/2010● Field trials are scheduled

for Q4/2010● Complementation by HarzEE-Mobility

project including eCar fleets

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www.regmodharz.de