IEEE Power & Energy Magazine - March/April 2014 - 58

Impact on
Impact on
Network
Overall Energy Costs (Losses
Excluded)

Possible Effects on Load

Tariff Type

Flat Volumetric
(€/kWh)

Low

Capacity Based
(€/kW)

Medium

Time-of-Use
Volumetric
* High €/kWh
(Peak Hours)
* Low €/kWh
(Off-Peak Hours)

High

Two-Part Tariff
* Power Component
(€/kW)
* Energy Component
(€/kWh)

The TSO-DSO
Interface and the
Coming European
Network Codes

Medium to High

figure 3. The impact of major tariff options on energy consumption and network
costs.
✔ Improving the evaluation of operational expendi-

Achievability of Regulated RoR

tures (opex): expenses for r&d and for smart grid
pilots should be excluded from the benchmarking
since the efficiency of innovation cannot be easily
evaluated.
✔ Incentivizing innovation and R&D funding: in the
last 20 years, innovation has been mainly about how
to reduce opex. Today, new technologies-in particular, communication technologies-will need to be
tested to determine what works in practice.
✔ Clarifying roles and responsibilities: clear mandates
and responsibilities are important for driving smart grid

Regulatory RoR
Is Achievable
Achievable RoR
Below Regulatory RoR
Achievable RoR
Significantly Below
Regulatory RoR

IT

CZ

PL

AT

PT

DE

DK

FR

SK

NO

Low

Redefining the
TSO-DSO Interface

on top of improving the regulatory framework for dsos,
adequate network codes should be approved at the european
level. Tsos are in charge of overall system stability; there is
a long tradition of cross-border cooperation, and Tsos are
closely involved in market design. They are accustomed to
managing a system in which a mass of highly predictable
and reliable, fully observable, nearly fully controllable generation is provided by a limited number of large facilities
operated by industrial experts and directly connected to the
transmission network.
but times are changing. Today, a large amount of new
generation capacity is being connected to the distribution

SE

ES

investments forward (including smart metering). national
regulators should assist in
clarifying roles and responsibilities in a smart grid
environment.
✔ Safeguarding regulatory
stability: besides a stable
regulatory system, a regulatory roadmap (perhaps
to 2020, as exists in Finland)
may be a suitable instrument
for the enhancement of regulatory stability (see Figure 4).

Moderate

FI

GB

SL

NL

High

Regulatory Stability

figure 4. The achievability of regulated rate of return (RoR) and regulatory stability for various European countries
(source: EURELECTRIC).
58

ieee power & energy magazine

march/april 2014



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