An intranet-based transmission grid fault location platform using synchronized IED data for the Taiwan power system

In this paper, we propose an application of a developed fault location platform to the Taiwan transmission grid using transmitted synchronized IED (Intelligent Electronic Device) data as inputs to the platform via Ethernet. The proposed fault location platform can also be applied to utilities with IEDs around the world. IED measurements are synchronized with embedded phasor measurement unit (PMU) function in IEDs or with unsynchronized measurements correction method in the platform. The functions of the fault location platform consist of COMTRADE file converter, faulted waveform display function, digital filter, two-terminal and three-terminal transmission line fault location algorithms, unsynchronized measurements correction method, and graphical display of fault location. Due to the high accuracy and fast analysis features of the platform, utilities can reduce large amount of manpower cost and power interruption cost during a fault searching period. Field event results of the platform over the Taiwan power system are provided to demonstrate the claimed features.