Low capacitor reactive compensation plan (No detuning reactor) apply in the low voltage power system of harmonic content is lower, which rated frequency in 400V; 50Hz. Usually, it can be considered using capacitor compensation, when the share load power of system and the system of transformer power within 15%.
It should be considered the low voltage capacitor with no series reactor and transformer will form a series resonance circuit, under the harmonic content is higher in medium voltage system circumstance. When the system harmonic frequency close to the resonance frequency of series resonance circuit, it’s will produce system resonance. In this circumstance, it’s should be considered to use harmonic compensatio n plan.
Selection table
Design scheme