Research on Reactive Power and Voltage Equalization Control Strategy of Photovoltaic Inverter Cluster

A Novel Coordinated Control System to Reactive Power Compensation of Photovoltaic Inverter Clusters

“…Each PV matrix is composed of different numbers of inverters and PV arrays. us, the PVPS is a multigeneration node grouping and hierarchical converging system [32]. PV inverter usually operates at a constant PF (usually 1) to improve power generation, which leads to uncontrollable reactive power with the change of light and temperature [12,22].…”

“…According to the comprehensive status of power quality obtained at PCC, the reactive power ΔQ needing to be regulated is calculated, and then, the reactive power execution of the inverter is obtained through the feeder distribution algorithm and the inverter group distribution algorithm, as well as the power iteration between groups [32]. e scheme in Figure 3 is a dynamic real-time tracking control [28], so the oscillation amplitude of the control effect is related to the interval period between two commands.…”

“…However, as shown in Table 1, the existing applications mostly consider how to ensure the compensation effect and PVPS revenue, while ignoring the equilibrium problem of DG nodes [30,31]. And algorithms are mostly based on simulation analysis, ignoring the interference to the environment and sampling data, as well as experimental verification and engineering applications sometimes [32]. Based on this, this paper proposes an algorithm for reactive power equilibrium distribution of parallel devices, which can provide a solution to the existing problems.…”