Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia Grid inertia

1. Measuring
GridInertia
Accuratelywill
enablemoreefficient
FrequencyManagement

2. What is inertia……
•Electrical inertia is the property of the
system which opposes changes in current. In
the power system, inertia is the term given
to the store of kinetic energy found in by
the rotating mass of traditional turbines
which turn in synchronicity with each other
and are coupled to the power system,
delivering a steady system frequency.

3. •In a 50 Hz system, thermal turbines all
rotate at 3,000 RPM (nuclear turbines turn
at half the rate), and the large mass of the
turbines means that a significant amount
of energy is required to alter the rate of
rotation.

5. •If supply and demand become imbalanced, the
voltage of the system begins to fluctuate –
when the demand exceeds supply, the system
frequency will fall, and vice versa. The rate of
change of frequency fall will depend on the
initial power mismatch and level of system
inertia.

6. •The frequency fluctuations are resisted by the
sources of inertia on the grid – the principle of
conservation of energy requires that power in
must equal power out at all times, so when
there is a power imbalance on the system,
energy is transferred between the kinetic
energy stored in the rotating turbines and the
power system in order to maintain equilibrium
between generation and demand.

8. For example

13. under
review

14. Reactive Technologies Project
SIM

16. Project Samuel

23. In addition, with
the
introduction of
power
electronically
coupled
wind generators,
Ekanayake1 has
suggested that
the
system inertia
constant might
drop
to as low as
3 s in 2020.