LabVIEW Based Transient Stability Analysis of A Multi-Machine System When Equipped With Hybrid Power Flow Controller

The high cost of the Voltage Source Converters (VSC) based FACTS controllers such as STATCOM, SSSC and UPFC is found to be the major hindrance to their widespread use. The classical controllers such as SVC and TCSC are important because of their simple construction, ease of use and low installation cost. Over the years, environmental, right-of-way and cost problems have delayed construction of generation facilities as well as new transmission lines. Better utilization of existing power systems and control equipment has thus become imperative. Novel and cost effective FACTS topologies therefore, need to be built upon existing equipment which makes use of static converters. The control performance of such topologies therefore, needs to be analyzed. Such controllers have been envisaged to be Hybrid Power Flow Controllers (HPFC). In the present work, the authors have made an attempt to simulate HPFC in terms of transfer function models. This simulated model has been tested by incorporating it in a MultiMachine system. LabVIEW software has been employed for this purpose. Results obtained are encouraging and indicate that the dynamic performance of the power system has quite a bit improved with the HPFC.