Voltage Stability Improvement using STATCOM and SVC

Abstract

Voltage stability of a system is affected by reactive power limit of the system. FACTs devices improve the reactive power flow in system thereby improving voltage stability. This paper explores the effect of SVC and STATCOM on static voltage stability. IEEE-14 bus system has been used to demonstrate the ability of SVC and STATCOM in improving the voltage stability margin. These FACTs controllers help to increase the load ability margin of the power network.

Voltage Stability Assessments and Their Improvement Using Optimal Placed Static Synchronous Compensator (STATCOM)

“…(11) For each particle, if the personal best of current fitness (P) is better than the P best of previous fitness, then P best � P. (12) Set Pbest and Gbest to their best. (13) Go to step number 7, until the maximum number of iterations is completed. ( 14) Gbest particle coordinates give optimized values of control variables and their fitness gives minimized values of power losses and voltage magnitude within the standard limit.…”

“…In the abnormal condition of the system, STATCOM is the most selective device to overcome the spread of abnormalities throughout the system. In this paper's work, the STAT-COM device is selected as a compensator due to its more extensive and constant compensation current (independent of the system voltage), linear change of absorption and generation of reactive power, and fast action response [13].…”

Simulation of the influence of STATCOM on power system losses

“…With respect to the STATCOM, the authors in [13] show the optimal location of this device for safe loading margin and stability limits in power systems. Additionally, the STATCOM has been used for reducing low-frequency oscillations [14], improving voltage stability margin [15], and identifying sensitive buses [16].…”