Nuku alofa compensation cabinet capacitor

What is a shunt capacitor bank?

Prior to 1950s the shunt capacitor banks (SCB) were placed nearer to the main substation for capacitive reactive power compensation, it helps in improving the power factor, reduces I 2 R power losses and improving the voltage profile.

How is a capacitor bank calculated?

For the bus having the lowest value of SI, the SCB will be placed at that bus. Once the SCB location has been identified, the size of capacitor bank is calculated based on minimization of active I2R power losses (PL), given by Eq.

Why do large power consumers install shunt capacitors?

In literature it has also been concluded that the maximum loading of the distribution system is limited by the voltage limit rather than the thermal limit . Large power consumers also installed shunt capacitor to improve the overall power factor and thus save the cost of poor power factor penalty.

How do you calculate a capacitor's life span?

The capacitors' life span is calculated by extrapolating the results of an ageing test. The IEC 61049 standard serves as the reference. The following calculation method is used: The ageing test involves submitting the capacitor to a test voltage greater than the rated voltage for a given period of time at the maximum operating temperature.

What is a detuned capacitor system?

A detuned capacitor system works out the function of power factor correction while preventing any amplification of harmonic currents and voltages caused by resonance between the capacitor and inductive impedances of the electrical system.

What is the minimum number of capacitor units connected in parallel?

As a general rule, the minimum number of units connected in parallel is such that isolation of one capacitor unit in a group should not cause a voltage unbalance more than 110% of rated voltage on the remaining capacitors of the group.