Series Capacitor Application 1

[kartracer087]

Hi,

Say that my system voltage is 13,800Y/7,970V.

If one was to connect a capacitor that is nameplate rated 100kVAR 7,970V in series with a 50kVAR unit with nameplate rating of 7,970V, would these two series capacitors be able to provide me with roughly 33.3kVAR per the series capacitor rule? Will the actual kVAR of the series assembly be reduced from the calculated series rating of 33.33kVAR because the voltage across each individual unit is less than nameplate of 7,970V? Not sure how that works.

In this case would it be required to spec one unit at roughly 5,340V and the second unit at roughly 2,630V (this would be the approximate voltage split across each capacitor)? Or can the capacitors both be specified as 7,970V rated and you'll still get roughly the nameplate kVAR out of the series combined units?

Thanks,

 

[waross]

reactive power is "var

You have a lot of inertia to overcome in the USA to replace KVAR with kvar.

cia.gov Note: At this time, only three countries - Burma, Liberia, and the US - have not adopted the International System of Units (SI, or metric system) as their official system of weights and measures.

 

[crshears]

Fair enough.

Note: in power system operation documentation and station displays, MW is used as the unit for real power flow, and MX for reactive power flow. Perhaps not technically correct, but ubiquitous practice where I come from.