Is there stepless reactive power compensation?

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Personally, I believe that for simple reactive power compensation, stepless regulation is not necessary; the power system in the petrochemical industry has a relatively stable load, so high sensitivity for reactive power compensation is not required (it is sufficient as long as the power factor meets the requirements). In specific load industries where load fluctuations are large and the power factor changes significantly, separate consideration can be given. As is currently known, industries such as machining, the automotive industry, and the metallurgy sector commonly use a combination of filtering and compensation to achieve seamless adjustment of harmonics and power factor; of course, this requires high investment

I want to know about the current technological advancements and their usage. The stepless nature of reactive power compensation requirements is not a matter of precision; it is rather a question of how to achieve automatic and timely compensation in a safe and reliable manner. Currently, for automatic compensation, contactors are used; there is a problem with pulse overvoltage. However, without automatic compensation, severe under-compensation or over-compensation issues may occur. That is why this question is raised.

For conventional power capacitors at present, since the capacitor unit itself is fixed, and although there are differences in capacitance, switching must be done for one or a few units only; it is not possible to supply the exact amount of reactive power required. Additionally, when it comes to switching, there are contactor-based switching and power electronics-based switching. The advantage of contactors is their low cost and minimal maintenance requirements; the disadvantage is operational overvoltage (which can be addressed by increasing the capacitance voltage by one or two levels). Power electronics switching requires a control system to reduce operating overvoltage, but this increases costs and maintenance requirements. As far as I know, the more common technique at present is active filtering (including reactive power compensation), which enables real-time tracking of load conditions and allows for real-time adjustments (keywords: automatic, stepless, rapid, real-time tracking).

For conventional power capacitors at present, since the capacitor unit itself is fixed, and although there are differences in capacitance, switching must be done for one or a few units only; it is not possible to supply the exact amount of reactive power required. Additionally, when it comes to switching, there are contactor-based switching and power electronics-based switching. The advantage of contactors is their low cost and minimal maintenance requirements; the disadvantage is operational overvoltage (which can be addressed by increasing the capacitance voltage by one or two levels). Power electronics switching requires a control system to reduce operating overvoltage, but this increases costs and maintenance requirements. As far as I know, the more common technique at present is active filtering (including reactive power compensation), which enables real-time tracking of load conditions and allows for real-time adjustments (keywords: automatic, stepless, rapid, real-time tracking).