Power Flow-Based Voltage Stability Analysis with Renewable Integration and Compensation

A. E. Airoboman, Ozioko Ugochukwu Jerald, Titilayo Oyedele, Ani Christian Osita

Abstract


Voltage stability is increasingly critical in modern power systems due to rising load demand and the integration of renewable energy, a challenge exacerbated by the limitations of conventional power flow methods near the voltage collapse point. This study implements a Continuation Power Flow (CPF) algorithm in MATLAB to accurately trace P–V curves and determine the maximum loadability limit of the IEEE 14-bus system. The analysis covers five scenarios: base case, renewable integration using Grid-Following (PQ) and Grid-Forming (PV) models, shunt compensation, and a combined strategy. Results show that PQ-controlled renewable sources reduce the stability margin by 14.8%, while PV-controlled sources improve the margin by 4.4%. Dedicated shunt compensation provides a 19.8% improvement. The combined strategy achieves a 26.4% enhancement, shifting the weakest bus from Bus 14 to Bus 12. The study demonstrates CPF as a crucial tool for identifying weak buses and planning reactive power in renewable-integrated grids. 


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References


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