Platform/kVAr calculation

kVAr calculation

A simulation of the reactive compensation your installation needs, computed from your own measurements rather than a rule of thumb.

Size it before you buy it

The kVAr Calculations — Simulations module takes the reactive behaviour measured over the period and computes the compensation required. It is a simulation: you can see what different scenarios would do before committing to a purchase.

Oversizing costs as much as undersizing. An oversized bank produces overcompensation, which is also penalised, and the surplus equipment is never recovered.

Analysis granularity matters: reactive power varies with operation, and a coarse average can recommend a bank that fails in the moments that count.

What it delivers

  • Required reactive compensation derived from measurement
  • Simulated behaviour with the proposed compensation
  • Analysis per measurement point
  • Results at the chosen granularity

How to simulate

Set the target power factor — at the 5th percentile and as a minimum — over the chosen period and point, and the calculation returns the capacitive kVAr required. Changing the target and recomputing takes seconds, which is what makes comparing scenarios practical.

EVA-Smart AI kVAr calculation with current power factor, targets and required compensation
Current power factor — average and 5th percentile — against the targets, and the compensation needed to reach them. Here P5 sits at 0.9680, below the Grid Code limit, and the calculation returns 253.38 capacitive kVAr. The chart marks both boundaries: the 0.97 regulatory limit and overcompensation at 1.0.

Controls

  • Period: the measurement window feeding the calculation.
  • Granularity: the resolution of the analysis.
  • Substation: the point to compensate.

What it avoids

  • Buying a larger bank than needed and paying for overcompensation.
  • Falling short and keeping the penalty you set out to remove.
  • Justifying the investment to finance with a traceable calculation.
  • Comparing scenarios before issuing the purchase order.

Simulate your compensation before buying it

Book an EVA-Smart AI demo and let's run the calculation on your measurements.

Request a demo