Optimal Voltage Regulation Scheme for PV-Rich Distribution Systems Interconnected with D-STATCOM

Karar Mahmoud*, Mohamed Abdel-Nasser, Matti Lehtonen, Mahmoud Hussein

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


This paper proposes an optimal voltage regulation scheme (OVRS) for distribution systems with rich photovoltaic (PV). Various regulation devices are optimally controlled in a coordinated manner: PV inverter, D-STATCOM, step voltage regulator (SVR), and on-load-tap-changer (OLTC). A data structure algorithm is proposed to split the distribution system into layered zones considering the radial structure of the system. The solution process of the proposed scheme is accomplished by a meta-heuristic optimizer. OVRS addresses the voltage violations while yielding a coordinated operation of the various control devices. The proposed OVRS involves three control levels to completely prevent voltage violations. In the first control level, the PV inverter and D-STATCOM mitigate rapidly the local voltage deviation through injecting/absorbing optimized reactive power. The second control level is a decentralized-based control scheme that utilizes the voltage control devices in each zone to handle the voltage violations if any. For each zone, the control devices in the upper-stream zones (parent zones) are managed by the third control level to ensure cooperative control actions. The simulation results on the 119-bus distribution system, with clear, low fluctuation, and high fluctuation of solar radiation profiles, demonstrate the effectiveness of the proposed OVRS.
Original languageEnglish
Pages (from-to)2130-2143
Number of pages14
Issue number19-20
Early online date24 May 2021
Publication statusPublished - 15 Jun 2021
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Optimal Voltage Regulation Scheme for PV-Rich Distribution Systems Interconnected with D-STATCOM'. Together they form a unique fingerprint.

Cite this