Power Factor Correction

Wherever it is both economic and appropriate, determined by the campus' power factor and the utility company's tariff structure.

check this,

Power Factor Correction

You're the consultant, why don't you tell us your views and we will comment on them, after all you're getting paid we're not. If you're not willing to present your plans then go with PWS's response.

On the load side!!

But tt is not as easy as u think. It depends on the load of the feeder, size and type of cable and generation (solar/wind type) if any etc. You have to do the proper analysis for capacitor size and location with the help of any powerdesign software.

I hope this helps!!

I would suggest downstream from where the supply company has meters on which he charges you for reactive power. The voltage level will depend on where you have the reactive loads which need compensating and the cost of doing it at one voltage compared to another. There is no magic answer which substitutes for gathering detailed information on the system to enable evaluation of options

The cheapest way is to do it in bulk, but then it must be variable and changible for power factor shifts. It must be after the metering point. It is more costly to do it at the loads, but that way it can come in when the load is switched on. That eliminates the need for a variable bulk reactive power and the automation to drive it.

Hi, It is economical to provide the compensation at 433 volts level. Are you planning for automatic scheme or fixed compensation scheme. If only APFC systems are provided, you may face problem of low power factor reading at 33 KV utility billing meter, particularly at night / low load times. This will lead to penalties by some local utility boards. If you are facing this problem, you will have to additionally provide required rating of fixed capacitors suitable to provide compensation for transformer losses, blind zone loads of APFC etc. An other option is to make use of the 33 KV load current and voltages for measurement and use these for providing compensation at 433 volts level. In this case, the APFC relay measurement inputs have to be suitable for 110 volts and 1/5 amps CT secondary. Both options have been personally used by me in installations with good results. Of course selection of KVAR rating of each switching stages is critical. Pattabhiraman

Judicious compensation would be:

Partially individual (for steady loads)

Partially Group (with APFC Scheme)

Partially Central

And, not to forget, the compensation required for the transformer no load reactive power consumption