In the tie lines, the power transfer capability is significantly increased if the series compensation is applied. Beside usage of series capacitors in power distribution systems, they are used in many applications where the load is fluctuating in nature.
It is sometimes desirable to use a series connection of capacitors in order to be able to work with higher voltages. For example, let us assume that a 5kV power supply needs to be filtered using capacitors, and that the only available capacitors are rated at 1kV and are all of identical capacitance values.
The induction coil can be supplied through a series capacitor. The power factor of the induction furnace is always low and can be improved by using shunt capacitors. The series capacitor is used to improve the voltage regulation. A typical voltage range for a high voltage capacitor for induction heating is 2.5–6 kV single-phase or three-phase.
Capacitors in series Like other electrical elements, capacitors serve no purpose when used alone in a circuit. They are connected to other elements in a circuit in one of two ways: either in series…
The two common types of connections are called series and parallel. In this section, we will be discussing the series combination of capacitors. When the capacitors are connected in the form of a series combination, the capacitance in total is less than the individual capacitances of the series capacitors.
The principle of operation behind this protection system involves the instantaneous operation of the spark gap whenever the voltage across the spark gap exceeds the predetermined safe value. Thus, the series capacitor voltages are maintained within acceptable value.