Prototype models of FACTS Controllers and its Optimal Sizing and Placements in Large Scale Power Systems using Voltage Stability Indices

  • Venu Yarlagadda, D.Ravi Kumar, E.Shiva prasad,
Keywords: prototype models, SVC, TCSC, Generator Stability, Voltage Stability, Coordination Control of SVC and TCSC, large scale power systems, Stability Improvement.

Abstract

This article focuses on the physical realization of SVC, TCSC, combined SVC and TCSC prototype models. The FC-TCR and TSC-TCR models, TCSC model, combined TCSC and SVC models have been implemented and tested in the laboratory. An SMLB system is implemented with synchronous generator connected to induction machine through a short and t-line models. These prototype models of SVC and TCSC have been tested with open loop and closed loop modes. The coordination control of SVC and TCSC also tested and presented the results, which shows the ultimate improvement in system performance. The voltage stability indices can either reveal the critical bus or line of a power system. The said indices plays vital role in identifying the most critical n-1 and n-2 contingencies. This article focuses on optimal sizing and placement of TCSC and SVC. Outage priority ranking is found with Line Stability Index Lmn and FVSI.

The general criterion of identification of optimal placement is maximum value of line indices, which is used for identifying the severe most contingency. The optimal capacity is obtained in two different ways, one is converting ill bus to voltage controlled bus and the other one is reactive power loss and stability indices based iterative technique for optimization. Voltage stability of the system has been enhanced with optimal placed compensators. The critical buses have been identified for the practical combined A.P and Telangana state 124 bus test system for n-2 contingency, and placed the compensators at appropriate location and the performance of the system has been improved  considerably. The voltage profile of interconnected power systems is heavily dependent on reactive power variations. The power system loads are continually variable which leads to continuous variations in voltage. In general, most of the electric loads consume reactive power which lowers the voltages all over the network. The voltage variations can be maintained within the tolerable limit by providing necessary reactive power.

Published
2021-08-25
How to Cite
E.Shiva prasad, V. Y. D. K. (2021). Prototype models of FACTS Controllers and its Optimal Sizing and Placements in Large Scale Power Systems using Voltage Stability Indices. Design Engineering, 3636-3659. Retrieved from http://www.thedesignengineering.com/index.php/DE/article/view/3727
Section
Articles