Security aspects of flexible AC transmission system controller applications

摘要

The AC transmission system is emerging as a key recourse for the electric utilities. It is increasingly being stressed by wheeling demands for which it may not have been built. However, the power flows in a network are not easily controlled because line parameters, which determine the distribution of power in the system, are not easily changed. Power electronics based systems which can provide the operators the needed flexibility in controlling the system power flows have been in use for some time and more such systems are being developed. These systems are broadly referred to as FACTS which stands for flexible AC transmission system. This paper discusses the implications of FACTS technologies for the security and reliability of the AC transmission system and discusses how the new systems fits into the existing systems for control of the power system as a whole.