ABSTRACT
IEEE Standard 519 clearly states the requirements for harmonic control in transformers connected to grids which may contribute to the quality of the signal. This is connected to several nth harmonics that may cause a change in the nominal value of the voltage at the terminals of the distributed photovoltaic grid transformer (DPV-GT). Fluctuations in frequency that range from 1 to 20 Hz can cause light flicker that may affect electronic equipment that relies on constant power. Voltage fluctuations are due to fluctuations in load current. Examples of load that lead to voltage fluctuations are furnaces, copy machines, and refrigerators. Renewable sources of energy that show a fast fluctuation in output power are also potential sources of voltage fluctuation. Voltage flicker can be resolved by the use of high-speed insulated-gate bipolar transistor inverter-based voltage regulators that are always connected as shunt voltage regulators.
