Coupling capacitors are only used for coupling high frequency communication signals, making them equivalent to the capacitive part of a CVT. For voltages up to 820 KV. Typical connection schematics are shown in Figure 2: Secondary phase-and-ground voltage with three coupling capacitor voltage transformers (CCVTs) connected phase-to-ground.
itive Voltage Transformers / Coupling Capacitor Voltage TransformersCapacitive Voltage Transformers (CVTs) have been widely used within transmission power sys ems for applications ranging from high-voltage to ultra high-voltage. CVTs are primarily used for voltage measurement, providing voltage signals to me
There are several types of instrument transformers, but one of the most common on higher voltage transmission systems is the coupling capacitor voltage transformer (CCVT). CCVTs are devices capable of dual function.
The uniqueness of this scenario lies in the decision to install the capacitor bank at the 11 KV voltage level, even though the factory receives power from the grid at a higher voltage level of 132kV, with an approved connection capacity of 12 megawatts.
In this section, we delve into a practical case study involving the selection and calculation of a capacitor bank situated within a 132 by 11 KV substation. The primary objective of this capacitor bank is to enhance the power factor of a factory.
For a given group of coupling-capacitor potential devices, the product of the capacitance of the main capacitor C1 and the rated circuit-voltage value of VS is practically constant; in other words, the number of series capacitor units that comprise C1 is approximately directly proportional to the rated circuit voltage.