designing the grid of the future by stefan kuppers

RWE Rhein-Ruhr Netzservice 8th of June 2012

Influence of Increasing Renewable Generation on German Distribution Grids

First experiences

Toronto, June 8th 2012Future of Energy Summit – Track 2: Grid of the future

Dr. Stefan KüppersRWE Rhein-Ruhr Netzservice GmbH

RWE Rhein-Ruhr Netzservice 8th of June 2012 PAGE 2

Ambitious, achievable German targets concerning renewable generation and energy efficiency

nuclearlignitecoalgasothersrenewable

18 %

25 %

19 %

14 %

4 %

20 %

Generation mix 2011 (energy)

conventionalrenewable

20 %

80 %

Generation mix 2050German policy target

(energy)

Source: AGEB

Basic points of the German energy transition

> Reduction of greenhouse-gas emissions by 40% in 2020 and by 80-95% in 2050 compared to 1990

> 80% renewable generation in 2050; 35% in 2020

> Reduction of primary energy consumption by 20% until 2020 and by 50% until 2050 compared to 2008

> Reduction of emissions caused by traffic until 2020 by 10% and until 2050 by 40%. 6 Million electrical vehicles in 2030.


Increase of renewable generation: Almost half of the consumed power is generated by renewables

> On the last weekend of May 2012 almost half of the consumed energy in Germany was generated by photovoltaic

photovoltaic wind conventional generation

MW

5/25/2012 5/26/2012 5/27/2012 5/28/2012 5/29/2012

Gen

erati

on


Local, renewable generation is mostly connected to distribution network

> Political driven extension of renewable generation reduces the number of conventional power plants

> Large amount of generation is directly fed into distribution grids

> Renewable generation produces high grid loads especially within distribution grids

> Strong regionalization of renewable generation due to dependency on primary energy sources (sun, wind …)

> Feedback from lower to higher grid levels is already occurring today (especially in low load situations)

M G

M G M G

M G

Dis

trib

utio

n G

ridT

rans

mis

sion

G

rid

> Distribution grids are mainly effected by today´s energy transition in GermanyIn 2010 and 2011 there were 250.000/a new PV plants connected!

Future structure of German supply system

Foreign country


Smart meter field trialProject: “Mülheim zählt“

erweiterbarGas Wasser Wärme

Inhouse communication

Meter

MUC

PLC

Monthly data online customer access

PC-Software

Digital Pictureframe

Data Concentrator

Targets

>Transparency of energy consumption>Detection of optimization potentials>Standardization of the tested technology>Field trial of new products (e.g. tariffs)

„Mülheim zählt“

>Installation and operation of 100.000 Smart Meter

>Automatic readout of meter data over distance

>Usage of PLC* as a cost-efficient communication technology

>Visualization of customer energy consumption

Idea

>Testing a sustainable, modular, standardized technology concept

Option

>Influence load and generation

*PLC = Powerline communication


Combine local load and generation with market signalsProject „E-DeMa“

Test laboratory Duisburg: Use of E-DeMa components „GW2-customer“ with micro-cogeneration in Mülheim

Test laboratory Essen-Kettwig: Inhouse communication


Smart Solutions

Smart Grid solutions to face future challengesProject: “Smart Country”

1. Demonstration and validation 2. Adoption of efficient solutions for planning

and operation purposes

bio gas storage

Voltage Controller

observability

Strong cable connection

> Observability optimization of network control

> Bio Gas Storage decoupling of generation and consumption

> Middle-/Low Voltage ControllerMaximization of asset capacity

utilization

> Strong cable connection Increase of connection capacity for renewable generation


Extreme flexibility of the system is necessary to balance the future renewable generation

-30

-20

-10

0

10

20

30

40

Th Fr Sa

37 GW

GW

4h0

10

20

30

40

50

60

70

80

90

Th Fr Sa

solarwind - onshorewind - offshorecogenerationbiomassgeothermalwaterload

GW

Examplary characteristics of not-assessable generation and load (left side) as well as resulting residual load (right side) of a week in april 2030* - Scenario: Energy concept Germany and BMU study

residual loadnot-assessable generation and load

> Renewable generation causes high and fast fluctuations of residual load

> Concept for control of renewable generation necessary (partly already existing today)

> Flexible and controllable power plants (central and local) and storages needed to follow residual load and to stabilize the system

*Source: BDEW-study„Bewertung der Flexibilitäten von Stromerzeugungs- und KWK-Anlagen“;

Authors: CONSENTEC and IAEW der RWTH Aachen; October 2011

RWE Rhein-Ruhr Netzservice 8th of June 2012

Thank you very much for your attention!

Dr. Stefan Küppers

RWE Rhein-Ruhr Netzservice GmbH

Email: [email protected]

designing the grid of the future by stefan kuppers

Technology