A Contemporary Novel Classification of Voltage Stability Indices

Abstract

Within the framework of this study, the inductive analysis of voltage stability indices’ theoretical formulation, functionality, and overall performances are introduced. The prominence is given to investigate and compare the original indices from three main dimensions (formulation, assessment, and application) standpoints, which have been frequently used and recently attracted. The generalizability of an exhaustive investigation on comparison of voltage stability indices seems problematic due to the multiplicity of the indices, and more importantly, their variety in theoretical foundation and performances. This study purports the first-ever framework for voltage stability indices classification for power system analysis. The test results found that indices in the same category are coherent to their theoretical foundation. The paper highlights the fact that each category of the indices is functional for a particular application irrespective of the drawback ranking, and negated the application of the Jacobian matrix-based indices for online application. Finally, the research efforts put forward a novel classification of voltage stability indices within the main three aspects of formulation, assessment, and behavior analysis in a synergistic manner as an exhaustive reference for students, researchers, scholars, and practitioners related to voltage stability analysis. The simulation tools used were MATLAB® and PowerWorld®.

Static Voltage Stability Assessment of the Kenyan Power Network

“…Some of the VSIs include Voltage Collapse Point Indicator (VCPI) and Line Stability Index, L mn [55], Voltage Stability Index, L [56], Fast Voltage Stability Index (FVSI)) [57], Voltage Reactive Power Index (VQI), and Line Stability Factor (LQP) in [58], and respectively [59]. e authors in [60][61][62][63] present a review of the voltage stability indices that have been proposed over the years.…”

A Comprehensive Review on Optimal Location and Sizing of Reactive Power Compensation Using Hybrid-Based Approaches for Power Loss Reduction, Voltage Stability Improvement, Voltage Profile Enhancement and Loadability Enhancement

“…VSIs are capable to identify the weak lines and buses in the network under both offline and online mode via static analysis or phasor measurement units, provide the information on the stability of line connected between two buses at various loading conditions, determine the optimal placement and sizing of RPC and DG, and as a real-time indicator for voltage instability via Phasor Measurement Unit-Wide Area Measurement system (PMU-WAMS) [76][77][78][79]. Analyzing the voltage stability for a given power system involves two aspects; proximity which indicates how close is the system to approach voltage instability and mechanism that contributed to voltage instability such as the key factors of contributing the voltage instability, voltage weak points and areas involved [80]. Proximity provides an indicator of voltage security while mechanism produces useful information on how to prevent voltage instability occurrence for system modifications or operating strategies.…”

“…System variables-based indices which includes line VSIs, bus VSIs and overall VSIs are extracted based on two bus system model. They are less time consuming, preferable in identifying the weak or stress line bus in one area and react to the overall system load change [79][80]. Jacobian matrix based indices are not recommended for online application due to the nonlinearity characteristic at a collapse point and require high computation time.…”

“…Jacobian matrix based indices are not recommended for online application due to the nonlinearity characteristic at a collapse point and require high computation time. They do not accurately measured the collapse point due to the nonlinearity behavior whenever near to the collapse point [80]. PMU-based indices are more on monitoring voltage stability state which offers completely different application from the two mentioned indices [80].…”

Voltage instability identification with modified L-index using synchrophasor data

“…Voltage stability margin can be calculated in less time and these indices are more suitable for online monitoring applications [23]. Review and comparison of various VSIs proposed by the researchers [24], [25] in the last thee decades clearly shows the scope for investigation for the present study.…”