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In this paper, the overvoltage problems that might arise from the integration of photovoltaic (PV) panels into low-voltage (LV) distribution networks is addressed. A distributed scheme is proposed that adjusts the reactive and active power output of inverters to prevent or alleviate such problems. The proposed scheme is model-free and makes use of limited communication between the controllers in the...
Fault ride through (FRT) capability is one of the challenges faced in the medium to high voltage large-scale grid-tied photovoltaic power plants (PVPPs). Besides that, due to the high penetration of installed distributed generation (DG) units, the grid voltage enhancement under unbalanced faults is a requirement of several standards and grid codes. The controller of the grid-connected inverter consists...
Solar photovoltaic systems continue to expand across the United States due to cost competitiveness, Federal and state incentives, and Renewable Portfolio Standards (RPSs). Transmission Planners and Operators must ensure high levels of grid reliability as increasing penetration levels further affect system variability and generation intermittency. A Time Step Simulation (TSS) is developed to study...
Photovoltaic power connected the distribution network has changed the power flow, resulting in voltage rise at PCC. Various methods have been proposed to limit the voltage within standard. Different methods were compared in this paper to identify their advantages and disadvantages. First, pure active power was injected in order to study the influence on voltage of each node; then every active voltage-control...
Drop in prices of PV panels and increased awareness of environmental concerns is resulting in high number of rooftop solar PV installations. Rapid irradiance changes on partly cloudy days causes severe fluctuations in PV power output resulting in rapid fluctuations in voltage, which makes large-scale integration of rooftop solar PV into the grid a major challenge. This paper presents an inverter-based...
A decentralized control method for photovoltaic (PV) inverters in low-voltage feeders with domestic loads and PV systems is proposed, with which the voltage profile along the feeder is kept within the limits specified by the EN 50160 standard and the branch currents in the feeder are kept below the thermal limit at all possible operating conditions of the load, the PV generation or the voltage fluctuations...
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