Abstract:
Due to the disparity between supplied and demanded reactive power, the bus voltages deviate from their
nominal voltage levels, leading to voltage instability. An effective
reactive power compensation can prevent the voltage instability
issues in power systems, and ensures a reliable and resilient
transmission system. Static Var Compensators (SVCs) are widely
used as reactive power compensators to prevent voltage stability
issues. Owing to their higher cost, SVCs are placed in the
large power system networks after meticulous planning to reap
maximum benefit with limited number of devices. In this work,
a methodology is proposed to quantify the effectiveness of a
potential SVC location using four voltage stability criteria, i.e.,
least electrical distance, higher line flow, maximum angular
difference and higher modal participation. Candidate SVC locations are evaluated using these four criteria via means of an
integrated Fuzzy Analytic Hierarchy Process (FAHP) and Fuzzy
Technique for Order of Preference by Similarity to Ideal Solution
(FTOPSIS) methodology. The critical locations obtained using
this methodology form the potential locations for SVC placement.
The effectiveness of SVCs in enhancing the static voltage stability
margins is then assessed for IEEE 14-bus and Reduced NRPG
246-bus systems.
