ABSTRACT
Natural gas is one of the most widely used sources
of energy in Europe. The whole supply chain of nat-
ural gas, from the gas well through several kinds of
elements to final customers, creates an integrated
and closed network system. With the increasing of
gas demand over the world, natural gas pipeline sys-
tems become more and more complex as years pass
by. To ensure safe and reliable gas transmission to
customers, optimal design and efficient operation of
natural gas network is the key factor. Computer si-
mulation tools are state of the art as far as network
develops and efficient operation is concerned consi-
dering the complexity of the network.
