AEP (American Electric Power) has
installed 138 kV, 150 MVA phase-shifting
transformers (PSTs) on the ERCOT (Electric
Reliability Council of Texas) transmission
grid. Three units went into service in 2006,
one in 2007, and at least one installation is
planned for 2008. These transformers were
selected to help optimize power flow from
existing transmission system assets until future
345 kV line construction projects can be
completed. The delta/hex PSTs deployed in
South Texas are a new, single-tank design
that promises to be much more economical
than previous designs.
Abstract:
AEP (American Electric Power) has
installed 138 kV, 150 MVA phase-shifting
transformers (PSTs) on the ERCOT (Electric
Reliability Council of Texas) transmission
grid. Three units went into service in 2006,
one in 2007, and at least one installation is
planned for 2008. These transformers were
selected to help optimize power flow from
existing transmission system assets until future
345 kV line construction projects can be
completed. The delta/hex PSTs deployed in
South Texas are a new, single-tank design
that promises to be much more economical
than previous designs.
Published By:
Schweitzer Engineering Laboratories, Inc. (SEL)
