|
Eberhard Waffenschmidt,
“Virtual inertia grid control with LED lamp driver”,
5th International Energy and Sustainability Conference 2016 (IESC 2016),
Cologne, Germany, 30. Jun. – 1. Jul. 2016
Soon, rotating inertia of generators use for grid control must be replaced
due to the growth of distributed renewable energies. Here, we propose
to let also electronic loads contribute to future virtual inertia. It
is suggested to use DC link capacitors of power supplies for this task.
This requires 5 W, 50 J and a capacitor size of about 200 cm³ per installed
kW, corresponding to the size of single phase DC link capacitors. It
is shown that the additional power ripple (and thus current ripple)
is in the order of 0.1% and the voltage ripple of the intermediate voltage
will typically remain between +/-3.6%.
The related control can be easily extended by adding a voltage signal
to the control voltage, which is proportional to the frequency deviation.
Then, the existing power factor correction controller inherently sets
the required additional power fluctuation required for the virtual inertia
function.
> Pre-print version: PDF-document
(0.49 MB)
|
General control concept. Top: general block diagram of
a power factor correction (PFC) converter. Bottom: details of the control
circuit. Red: Additions for the virtual inertia control. |