Mitigation of Fault in 11-Level Converter STATCOM
K.Priyanka1 and C.Venkatesh2
of electrical and electronics engineering,
S.R. Engineering college, JNTUH,
Warangal, India. email: email@example.com
This paper introduces an approach to detect the existence of thefaulted switch, identify which switch is faulty, and reconfigure the STATCOM.
This approach is illustrated on an eleven-level STATCOM and the effect on the
dynamic performance and the total harmonic distortion (THD) is analyzed Many
static synchronous compensators (STATCOMs) utilize multilevel converters due to
the following: 1) lower har- monic injection into the power system; 2)
decreased stress on the electronic components due to decreased voltages; and 3)
lower switching losses. One disadvantage, however, is the increased like- lihood
of a switch failure due to the increased number of switches in a multilevel
converter. Due to its unique topology, the Modular Multilevel STATCOM has many
advantages but requires a sophisticated controller and puts higher requirements
on simulation tools. A single switch failure, however, does not necessarily
force an (2n + 1)-level STATCOM offline. Even with a reduced number of
switches, a STATCOM can still provide a significant range of control by
removing the module of the faulted switch and continuing with (2n − 1) levels.
Index Terms- Fault detection, multilevel converter, static
synchronous compensator (STATCOM).