S. Wall et D. Mcshane, A STRATEGY FOR LOW-COST UTILITY CONNECTION OF BATTERY ENERGY-STORAGE SYSTEMS, Journal of power sources, 67(1-2), 1997, pp. 193-200
Battery energy storage is a well-known concept that has applications w
ithin the electricity supply industry. In a battery energy storage sys
tem (BESS), the d.c. energy in the batteries is exchanged with the d.c
. utility using a power conversion system (PCS). The development of a
generic low-cost PCS is identified as being critical to commercial via
bility of battery energy storage. The paper presents commercial and fu
nctional advantages of using a modular approach to power conversion in
a BESS. Dynamic models are developed for both single and networked po
wer converters. These are used to demonstrate the technical feasibilit
y of the modular approach. The Wavedriver PCS is presented. This uses
a modular network of generic power converters to provide higher functi
onality. Each power converter incorporates a higher level of systems i
ntegration than is usually. present in a traditional PCS. This approac
h changes the balance on the commercial viability of energy storage sy
stems. (C) 1997 Published by Elsevier Science S.A.