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A fuzzy comprehensive evaluation of COGAG
power plant performance is given by using a method of fuzzy mathematics, and
multilevel fuzzy evaluation model is set up. Taking a naval ship as an example,
the major parameters related to COGAG power plant performance are obtained by
computer simulation, and a set of synthetic performance evaluation index system
is established. The result shows that the strong fuzzy propulsion system
performance indexes can be quantified by this fuzzy evaluation model in order
to provide the reference for choosing the optimal design of ship propulsion system.
Besides pumped hydropower, Compressed Air
Energy Storage (CAES) is the other solution for large energy storage capacity.
It can balance fluctuations in supply and demand of electricity. CAES is
essential part of smart power grids. Linked with the flow structure and dynamic
characteristic of electricity generation subsystem and its components, a
simulation model is proposed. Thermo-dynamical performance on off-design conditions
have been analyzed with constant air mass flux and constant gas combustion
temperature. Some simulation diagrams of curve are plotted too. The contrast of
varied operation mode thermal performance is made between CAES power plant and
simple gas turbine power plant.