How is capacitance determined in a PV control circuit?

The control circuit compares the total generated PV power and load voltage with the rated value. Now, capacitance magnitude is decided using eq. (28) as per the voltage fluctuations. Further, special capacitors from the bank (C1…C5) are selected, which provide the required capacitance.

How accurate is a capacitance selection?

The accuracy of a capacitance selection is equal to ~3.1%. Also, it is mentioned that the voltage control can be ~3% with the bank of 5 capacitors (binary dispersed). More precise results can be obtained with a capacitor bank having more capacitors.

How many capacitors are in a capacitance bank?

The capacitance bank has five capacitors with capacitances of 4.4 μF, 9.9 μF, 17.1 μF, 35.4 μF, and 64.8 μF. It is important to note here that the capacitance values are arranged approximately in binary order. All of them have individual switches allowing a total of 32 combinations of different capacitances.

How do you calculate the accuracy of a capacitor bank?

More precise results can be obtained with a capacitor bank having more capacitors. The accuracy can be estimated as follows: (33) δ % = 1 2 N 100 % where N is the total number of binary dispersed capacitors.

What is the analytical solution for capacitance connection at load?

Initially, a strict analytical solution is developed to study the outcome of capacitance connection at load. The capacitance is selected based on the analytical solution of non-linear equations describing voltage deviations in the distribution line connected with photovoltaic systems.

How is capacitance selected in a photovoltaic system?

The capacitance is selected based on the analytical solution of non-linear equations describing voltage deviations in the distribution line connected with photovoltaic systems. The control system is developed for fast and appropriate capacitance selection and a smooth transient process.