Analysis of Power Grid Voltage Stability With High Penetration of Solar PV Systems

• Published in: IEEE transactions on industry applications Vol. 57; no. 3; pp. 2245 - 2257
• Main Authors: Rahman, S., Saha, S., Islam, S. N., Arif, M. T., Mosadeghy, M., Haque, M. E., Oo, A. M. T.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-05-2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Critical eigenvalue; Demand; Eigenvalues; Electric power grids; Energy costs; Energy resources; Energy sources; Greenhouse gases; Inverters; modal analysis; Monte Carlo simulation; Penetration; photovoltaic (PV) penetration; Photovoltaic cells; Power grids; Power system stability; QV curve method; Reactive power; reactive power reserve/margin; Stability analysis; Stability criteria; static voltage stability; stochastic loads; Thermal stability; total line losses; Uncertainty; Voltage control; Voltage stability
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/TIA.2021.3066326

Grid integration of solar photovoltaic (PV) systems has been escalating in recent years, with two main motivations: reducing greenhouse gas (GHG) emission and minimizing energy cost. However, the intermittent nature of solar PV generated power can significantly affect the grid voltage stability. Therefore, intermittent solar PV power generation and uncertainties associated with load demand are required to be accounted for to gain a holistic understanding on power grid voltage stability with the high penetration of PV energy sources. This article presents a framework for power grid voltage stability analysis considering uncertainties associated with PV power generation and load demand using Monte Carlo simulation. Commonly used voltage stability indicators such as critical eigenvalue, line loss, reactive power margin have been considered in the proposed framework. The proposed methodology has been verified by analyzing the voltage stability of the IEEE 14 bus test system, with the high penetration of PV energy sources and considering uncertainties associated with load demand. The results provide a clear insight into the voltage stability of power grid with different penetration levels of PV energy sources into the power grid.