Evaluation of Inverter Control Strategies for Overvoltage Mitigation in Low-Voltage Networks
Online First: 10/09/2026
Corressponding author's email:
duybc26.ncs@hcmute.edu.vnDOI:
https://doi.org/10.54644/jte.2026.2513Keywords:
Overvoltage, Low-voltage distribution network, Reverse power flow, Power curtailment, Photovoltaic systemsAbstract
The rapid penetration of distributed photovoltaic (PV) systems into low-voltage distribution networks (LVDNs) poses significant challenges regarding nodal overvoltage caused by reverse power flow, particularly during periods of high solar irradiance and low load demand. To address this issue without compromising economic efficiency, this paper proposes a flexible coordinated active and reactive power control (FCAR) method. The primary advantage of FCAR lies in its ability to maximize the reactive power compensation capability of PV inverters prior to initiating active power curtailment. Through simulations conducted on the MATPOWER platform, the effectiveness of the FCAR algorithm is evaluated and compared with conventional control strategies, namely Active Power Curtailment () and Scheduled Power Factor Control (SPFC). The results confirm the efficacy of the FCAR method, which not only successfully restores and maintains the grid voltage within safe operating limits but also minimizes the required active power curtailment to a mere 1.19%. This study demonstrates the capability of the FCAR approach in achieving an optimal trade-off between ensuring the operational reliability of the distribution grid and maximizing the economic benefits of PV systems.
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