1. Unlocking Demand Contribution to Distribution Network Management
Dr Chris Horne, CEng, MIEEE, FIET
Head of Energy Infrastructure and End Use
E.ON New Build and Technology

2. Impact on Distribution
TODAY
2020+
Decarbonisation
Smart grids
Electric vehicles
Electric heating
Demand led
Generation led
Unabated fossil fuel
Ageing plant
Small nuclear
LCPD
Renewable generation
CCS
Large nuclear
Distributed generation
Impact on Distribution
Policy support
Concern over climate change is prompting a major policy change
We are moving from demand led to generation led
“We currently flex generation to meet demand; we now need to also flex demand to meet generation.“ (National Grid, 2009)

3. Demand Side Management
energy efficiency
Demand Side Management
energy conservation
Demand Response
Flexible Demand
DSM comprises 3 elements:
energy efficiency: using less energy to achieve the same objective (e.g. efficient appliances, insulation)
energy conservation: reducing energy consumption by electing not to perform some energy consuming tasks (e.g. behavioural change)
demand response: shifting energy time-of-use to increase system efficiency
FD is a subset of DR
DR does not affect the absolute load level
It affects load shape and only over the short term (mins to hours)
DR does not require smart grids or smart homes, BUT it does complement them
FD is a complement to other technologies

4. E.ON - Networks of the Future
Significant installation of PV in LV/MV distribution network
E.ON Bayern>3500MW peak on a sunny day
Continued future growth of PV and mCHP
Issues with reverse power flows and voltage profiles
R&D Focus on Demand Response
Distributed battery energy storage
Active load management
Part of a “tool box” of smart grid activities

5. Demonstrating Flexible Demand
UK Government Funded
Investigating complexities of distributed / aggregated demand response
Systems with inherent energy storage – GSHP / HVAC
Delivering response with no discernible impact on end user
Significant potential flexible response – focus on short term response
Challenge is delivering value across different parts of the value chain and finding market mechanisms to reward participation

6. Conclusions
Demand contribution has a significant role to play in future distribution networks
Issues are already being experienced by DNO’s
There is a difference between load shifting and ancillary service response
Market mechanisms need to be developed to deliver full potential of demand side participation