1077-2618/10/$26.00©2010 IEEE
BY PETER E. SUTHERLAND,
VINICIUS ROUBACH,&
LEANDRO MATOS RIANI
Large
self-generators
for controlled
load shedding
T
HIS ARTICLE PROVIDES AN ANALYSIS OF THE SEPARA-
tion philosophy for a large steel mill with internal generation,
which is transitioning from net power import to net power export
after the addition of two new steam turbine generators. Separation
from the utility in the case of a fault is determined by the operation of a protective
relay system at the point of separation. The plant has a programmable logic con-
troller (PLC)-controlled load shedding, which drops blocks of load, based upon
measurement of the amount of load and generation in service. With the addition
of new generation, alternatives such as generation rejection and fast turbine valv-
ing must be evaluated. Digital Object Identifier 10.1109/MIAS.2010.937439
© M.O. STEVENS FROM WIKIMEDIA COMMONS
20
IEEE INDUSTRY APPLICATIONS MAGAZINE
SEPT j OCT 2010
WWW.IEEE.ORG/IAS