Transformer Reactive Power Compensation – Fixed Capacitor Bank Calculation 1 Abstract — This letter derives simple and compact expression for power of fixed capacitor bank intended for reactive power compensation absorbed by the transformer.
Fixed capacitor banks are an economical choice for individual inductive loads or a group of loads that has a relatively constant demand for reactive power. Examples of such loads are induction motors and transformers. This paper derives simple and compact expression for power of fixed capacitor bank for reactive power compensation
Compensation can be provided by a bank of capacitors. In transformers, reactive power is absorbed by both shunt (magnetizing) and series (leakage flux) reactances. Complete compensation can be provided by a bank of shunt-connected LV capacitors A simple illustration of this phenomenon is given by the vector diagram of Figure L21.
capacitor bank) shows that almost there are no changes in voltage in comparison with uncompensated transformer. Input current from primary, HV side, will go to capacitive regime and is higher than no-load current without compensation (2.12∠88.12 0
Fixed capacitor banks are an economical choice for individual inductive loads or a group of loads that has a relatively constant demand for reactive power. Examples of such loads are induction motors and transformers.
Fig. L23 – Overcompensation of load to completely compensate transformer reactive-power losses In practical terms, therefore, compensation for transformer-absorbed kvar is included in the capacitors primarily intended for power factor correction of the load, either globally, partially, or in the individual mode.
Individual compensation can be performed with direct connection to the capacitor bank (figure 1.a) or by using an operation element (figure 1.b.) In the case of direct compensation, it is of vital …