Optimal location of voltage sags monitors by determining the vulnerable area of network buses

However, to analyze power quality parameters, it is necessary to record information through network buses but in order to save money, a limited number of buses are selected for this purpose. This paper presents the method of determining monitoring buses to observe the voltage sags in all parts of the network for the occurrence of any type of short circuit faults in the network. In this method, the number and location of monitoring buses are selected so that for the minimum number of monitoring buses, all network points are covered due to short circuit faults. For this purpose, first, by determining the vulnerable areas of network buses and then forming a monitor reach matrix for the network, the location and the minimum number of monitoring buses can be determined. The IEEE 14-bus system and 57 bus system are used to implement the proposed method.