Software for Power Grid Fault Location with Traveling-wave

Power grid fault location system using voltage traveling wave has been developed successfully by the authors. It includes traveling wave sensor, fault locator, and fault calculation center. Outputs of the sensors are applied to record the fault traveling wave arrived time with global position system (GPS) receiver in fault locator that is installed in every power station. The recorded times are then sent to fault calculation center. And the fault calculation center calculates the fault position. The fault calculation center communicates with fault locators in star model. Software for the calculation center and fault locator are designed in Delphi Language and presented in the paper, including display, human machine interface (HMI), communication, fault calculation, fault reporting, data base. The software is applied in a real power system for fault location. Test results show that the software has good performance and high reliability.