The control of large scale grid-tied photovoltaic rooftop systems to avoid the power factor charge

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

“…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]. Figure 2 shows the statistical status of Hisense PVPS in Foshan, China, with inverters at 0.95 fixed PF running within a week, and the phenomenon that the power station generates electricity with relatively stable PF in PCC PV during the generation period can be seen from the figure.…”

“…With the continuous construction and development of PV industry, as well as the increasing popularity of power substitution and power consumption upgrading, this burden will become more severe in the increasingly high penetration power system. Meanwhile, the continuous bad PF at PCC will cause assessment fines to users [22].…”

“…PV inverter can realize the decoupling control of active power and reactive power [7,11,12]. e control logic of RPC designing with this paper is shown in Figure 3 [22].…”

“…Applying inverters to compensate the reactive power while generating energy can achieve the same effect as SVG and can stabilize the feeder voltage and reduce line losses [20][21][22]. It is a current research hotspot to coordinate and control individual small-capacity inverter groups to achieve the overall superior system performance of PVPS.…”