Performance analysis of static network reduction methods commonly used in power systems

Network reduction techniques are useful means of analyzing large, interconnected power systems. The most desirable property of a reduced network is that it should represent the original network as accurately as possible. This paper explores some of the commonly used static network reduction techniques, such as Ward reduction, Kron reduction, Dimo's method, and Zhukov's method. The performances of the reduced networks are evaluated in terms of their ability to follow the bus voltages of the original network, with changes in operating conditions. The IEEE 14-bus and 118-bus systems are taken as the test beds.