Voltage Profile and Sensitivity Analysis for a Grid Connected Solar, Wind and Small Hydro Hybrid System

Noah Serem, Lawrence K. Letting and Josiah Munda
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Noah Serem: African Centre of Excellence in Energy and Sustainable Development, University of Rwanda, Kigali P.O. Box 4285, Rwanda
Lawrence K. Letting: Department of Electrical and communications Engineering, School of Engineering, Moi University, Eldoret P.O. Box 3900-30100, Kenya
Josiah Munda: Department of Electrical Engineering, Tshwane University of Technology, Pretoria X680-0001, South Africa

Energies, 2021, vol. 14, issue 12, 1-26

Abstract: Due to increase in integration of renewable energy into the grid and power quality issues arising from it, there is need for analysis and power improvement of such networks. This paper presents voltage profile, Q-V sensitivity analysis and Q-V curves analysis for a grid that is highly penetrated by renewable energy sources; solar PV, wind power and small hydro systems. Analysis is done on IEEE 39 bus test system with Wind power injection alone, PV power injection alone, with PV and wind power injection and with PV, wind and micro hydro power injection to the grid. The analysis is used to determine the buses where voltage stability improvement is needed. From the results, it was concluded that injection of the modeled wind power alone helped in stabilizing the voltage levels as determined from voltage profiles and reactive power margins. Replacing some of the conventional sources with PV power led to reduction of voltages for weak buses below the required standards. Injection of power from more than one renewable energy source helped in slightly improving the voltage levels. Distribution Static compensators (D-STATCOMs) were used to improve the voltage levels of the buses that were below the required standards.

Keywords: voltage profile; V-Q sensitivity; solar PV; wind power; micro hydro; D-STATCOM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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