renewables and the distribution grid...1st training course: fundamentals of energy regulation may 23...

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Renewables and the distribution

grid

Prepared by

Jenny Winkler

2 1st Training Course: Fundamentals of Energy Regulation

May 23 – May 25, 2018 • Nicosia, Cyprus

Agenda

1. Challenges of renewables on distribution grid levels

2. Regulatory intervention for avoiding negative effects on distribution

grid level

3. JRC results for distribution grids in Cyprus



The grid of the past and the future



Challenges for distribution grids in the

“new” world

Distribution grid traditionally designed to

accomodate for peak demand

Now generation, storage and additional

demand connected to the distribution grid

potentially higher capacity needed

potential feed-in from DG to TG

potential high ramp rates



Effects of generation on DG level

Distribution grid traditionally designed to accomodate for peak

demand

Now generation, storage and additional demand connected to the

distribution grid

potentially higher capacity needed

potential reversed power flow from DG to TG

potential high ramp rates



Effects of RES on DG level

Capacity exension requirements:

In areas with low population density peak generation can be

higher than peak demand

Net effect of distributed generation depends on alternative

generation (technology, grid level)

General analysis shows that generation at higher grid level

usually leads to lower grid extension requirements because

fewer grid levels are involved



Lower requirements with

batteries/EVs/changes in demand?

Batteries: without smart management, batteries with typical size do

not help.

Battery loading

genera

tion/

loadin

g

time

peak generation





changes in demand: potentially higher peak demand if people do

not adjust in totally correct way.

genera

tion/

loadin

g

time

Original peak

demand

D1

New peak

demand





Electric vehicles: potentially higher peak demand if no smart

charging is applied

genera

tion/

loadin

g

time

Original peak

demand

D1

New peak

demand



Possible measures for regulators

Peak shaving: plants only allowed to feed-in a certain percentage of the

electricity generated (e.g. Germany: 70% of installed capacity for small

PV plants)

Requirements for batteries/electric vehicles to apply grid-friendly

charging

Vehicle-to-grid obligations

Time-variable electricity tariffs to incentivise „wise“ consumption

Avoidance of building power plants in congested distribution grids



Avoidance of building power plants in

congested distribution grids

„Distribution grid component“ in auctions:

identification of areas with high RES capacity compared to demand

calculation of specific additional costs of both wind and PV installations in these

areas

Distribution grid component is applied when chosing the offers but not for the

support payments

time Source: BNetzA 2018



Ramp rates

Source: SHINES Program Review 2017



Capacity for RES integration in Cyprian

distribution grids

Total capacity estimated between 1178 and 2263 MW

Source: JRC 2017

W

THANK YOU

FOR YOUR ATTENTION!

1st Training Course: Fundamentals of Energy Regulation


E-mail: [email protected]

Web: www.isi.fraunhofer.de

renewables and the distribution grid...1st training course: fundamentals of energy regulation may 23...

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