The purpose of the capacitor bank is to mitigate droop in the HV supply caused by our load, which acts like a pulsed current source. The current pulses drain charge from the circuit, and the power supply can't react fast enough, leading to considerable droop over time. This all occurs on the nanosecond scale.
Abstract: High-voltage (HV) capacitor banks are constructed using combinations of series and parallel capacitor units to meet the required voltage and kilovar requirements. These capacitor banks utilize protective relays, which will trip the bank when problems are detected.
Capacitors banks may have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. Capacitors banks shall be stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.
To define the location of the capacitor bank it must be taken into account that three methods are used for power factor correction, which depends of the location of the inductive loads and their requested reactive power: Centralized correction: one capacitor bank is installed near the main incoming switchboard (see Figure 7).
The chapter presents typical configurations and constructional aspects of capacitor banks. The two most common implementations of capacitor/switch assemblies are common. One is to have a module make up of one or two capacitors with switch mounted directly over the capacitor terminals so that each module has its individual switch.
Figure 3 – HV Capacitor bank Figure 4 – LV Capacitor bank During electrical switching of capacitor banks, transient disturbances (during a short time) occur in power systems that may damage key equipment, potentially having a great impact on system reliability.