A Novel Mechanical Hardware in the Loop Platform for Distributed Generation Systems
DOI:
https://doi.org/10.13052/dgaej2156-3306.2831Keywords:
Hardware in the loop; distributed generation; low voltage, power quality, real time test bench.Abstract
The growing number of distributed generation (DG) plants has em-
phasized the need to perform tests before the plants begin to operate. DG
systems are complex enough that setting up of an experimental phase
requires high costs and efforts. Moreover, renewable energy sources are
intrinsically intermittent as they vary randomly with the time of day, the
season and the weather. Consequently, the possibility of emulating the
behavior of the whole renewable generation system in a real time envi-
ronment, where a part of the real system, the natural energy source, is
replaced by a real time computer simulation allows one to test the actual
system in all the operating conditions, optimizing the control strategy be-
fore its service entrance, overcoming the randomness of renewable en-
ergy sources. This article proposes a mechanical hardware in the loop ap-
proach applied to a renewable energy generating system, where the whole
drive (control, power electronics and electric machine) is tested and the
mechanical part is simulated in real time environment. The problem of
emulating the inertial torque, which can have a significant high value, is
solved through an approach that relaxes the high dynamic requirements
of the electrical drive that emulates the mechanical part. The hardware in
the loop test bench emulates two energy sources (hydro and wind). In ad-
dition, a control strategy that emulates the inertial torque is implemented.
An experimental phase in which different energy sources are modeled
and emulated in a real time environment is presented as well. The under-
lying hardware-in-the-loop energy source emulation and experimentation
scheme is shown to accurately represent real systems performance, under
various control strategies and varying operating conditions
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