| Abstract |
In last decade, greater changes were introduced into
the structure of electrical power utilities e.g. to raise the efficiency
in the operation of the power system by means of deregulating
the industry and/or opening it to private competition. This
trend and similar structural changes have also occurred in other
industries, like the telecommunication, airline and transportation
industries. The net effect of these changes necessitates that
the transmission, generation and distribution systems must now
adapt to a new set of rules dictated by open markets. Additionally
the development of new power semiconductors has opened
up novel possibilities in the field of high-power applications.
The power industry has responded to these challenges in different
ways. One tendency of the recent years is the development of
the new power semiconductor based devices to control e.g. the
active and reactive power flow. The so-called FACTS (flexible
ac transmission systems) together with different structural
changes in the production and transmission of electrical energy
reinforce the necessity to develop new simulation and computation
methods. One of the possible solutions is the state-space
approach suggested in this paper. |
