What is a ThD inverter?
The THD mirrors the inverter’s capability to regulate harmonic distortion and the maximum amount of harmonic distortion it could potentially output. However, beyond the hardware and software/algorithm configurations of the inverter, various external factors can negatively impact the inverter's performance and bring about harmonic distortion.
How to choose a solar inverter with low total harmonic distortion?
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.
What is harmonic distortion in solar inverters?
Simply put, harmonic distortion in solar inverters refers to the deviation from the ideal sinusoidal waveform of the electrical voltage and current output by the inverters.
What is a harmonic distortion (ithd) on an inverter?
Its ITHD is usually small and negligible as compared to a harmonics-producing load such as a variable speed drive (ITHD for a typical 6-pulse drive ranges between 30% – 50%). Typically, one will find a Current Total Harmonic Distortion of 3% stated in the datasheet for a quality-brand inverter, as seen here.
Do solar PV inverters have a power quality problem?
In general, current harmonics contribution from solar PV inverters do not pose much of a power quality problem. Its ITHD is usually small and negligible as compared to a harmonics-producing load such as a variable speed drive (ITHD for a typical 6-pulse drive ranges between 30% – 50%).
Does a low load inverter cause harmonic distortion?
Plus, when the inverter is operating at a low load, it tends to produce more harmonic distortion as the inverter's internal switching circuits are less efficient at low loads. Furthermore, improper installation or maintenance of the inverter might result in increased harmonic distortion.
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