GE AC Instalation and operation manual V10.docx
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2.
PRESENTATION
Introduction
As a grid emulator, the GE is an AC programmable power supply specially designed to emulate
grid disturbances. Its programmable parameters will allow the generation of different type of
grids and its common faults and disturbances. The main functionalities of the GE are the
following:
-
It converts the AC input, of the main grid, in a controlled programmable AC (optionally
also DC) output by using an IGBT-based switching topology and DSP-based state-of-the-
art digital control.
-
It can generate different types of grids:
o
Three phase power grid (3F+N) from 0 to 480 Vac (270Vrms f-n)
o
One phase power grid (1F+N) from 0 to 270 Vrms f-n
o
Power grid with variable frequency from 10 to 400 Hz
o
DC voltage source from 20 to 750 Vdc (optional)
o
HF Voltage Source from 360 to 880Hz (optional)
-
Faults that GE can generate are:
o
Power grid with voltage harmonics control up to 15th (13th if f0=60Hz)
o
Flickers (programmable amplitude and frequency) and overvoltage
o
Interruptions and voltage dips (types A, B,C,D)
o
Three phase power grids with programmable variations in frequency
o
Variable Z impedance of grid
-
As a bidirectional power supply, energy can flow from the grid to the equipment under
test (EUT) or viceversa. It allows energy saving during the tests by returning energy to
the power grid.
-
The AC current consumed from the grid is sinusoidal (THDi < 2%).
-
The user can define the reactive power to be injected by the GE and also choose
between capacitive or inductive.
The power range covered by the GE grid emulators goes from 7.5 to 200kVA (6.75-160kW). The
parallelization of GEs is possible to increase power.
