Current harmonic reduction for grid-connected photovoltaic
The evaluation of our results obtained is based on the value of the total harmonic distortion obtained (THD ≪ 5 % of the international standard). This control strategy eliminates
This measurement is publicly disclosed by manufacturers and provides users with an overall measure of the signal's distortion level. Now, THD has become an important criterion to assess the quality of solar inverters. The latest IEEE 519-2022 standard provides guidelines for acceptable levels of THD in power systems, including solar inverters.
Choosing a solar inverter with low total harmonic distortion (THD) lays the groundwork for maintaining the overall harmonic distortion at an ideal level. It is wise to be aware that investing in a quality inverter means lower risks of potential damage to connected loads.
The standard dictates that a synchronous inverter should avoid harmonics exceeding 5% while generating electricity from a solar photovoltaic generator, thus establishing this as the maximum value. As solar irradiance increases and reaches noon, THDI tends to zero.
Although there is a harmonic impact, solar PV inverters connected to the grid offer a high conversion efficiency (nearly 98%). In addition, they maintain a power factor higher than 90%, and, at the same time, they maintain a total harmonic distortion lower than 5% .
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