access icon openaccess Impact of photovoltaic systems on voltage stability in islanded distribution networks

This is an open access article published by the IET under the Creative Commons Attribution-NoDerivs License (http://creativecommons.org/licenses/by-nd/3.0/)
Received 06/11/2018, Accepted 10/01/2019, Published 15/03/2019

This work analyses the impact of photovoltaic generation on voltage stability margin in an islanded microgrid. An indicator of voltage collapse proximity, based on the maximum deliverable power, is used to study the contribution of photovoltaic generation to the voltage stability margin. In this context, the well-known power–voltage curves, also known as ‘nose’ curves, are developed, taking into account different levels of photovoltaic penetration. Furthermore, the effect of the power factor at the photovoltaic generators as well as the influence of the adopted model for such generators are also investigated. The results have shown that the photovoltaic generation can significantly affect the voltage stability margin.

Inspec keywords: power system stability; distributed power generation; power distribution faults; distribution networks; photovoltaic power systems; power system dynamic stability

Other keywords: photovoltaic generators; voltage collapse proximity; photovoltaic generation; islanded microgrid; maximum deliverable power; photovoltaic penetration; voltage stability margin; photovoltaic systems; islanded distribution networks; well-known power–voltage curves

Subjects: Distributed power generation; Distribution networks; Power system control; Solar power stations and photovoltaic power systems; Control of electric power systems

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