Diagram of voltage balancing line of parallel capacitor bank

What is a high-voltage capacitor bank?

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.

What is bank stability for a fuseless capacitor bank?

Bank stability for a fuseless capacitor bank is similar to that of an externally fused capacitor bank and defined by shorted series sections, internal to individual capacitors. The voltage on the remaining series sections in the string should not exceed 110% of its rated voltage.

Which balancing resistors should be connected in parallel to a capacitor?

2(i.e. U C1’ U C2’ U D/2), the manufacturers usually strictly recommend the application of balancing resistors R Bconnected in parallel to each capacitor [4, 5]. As will be discussed in Section 2 these resistors cause high dissipative losses, especially if they are dimensioned to cover full-range capacitor worst-case leakage.

Is active balancing a suitable method for series-connected electrolytic capacitors?

6 Conclusion The active concept introduced in this paper is a very attractive method for the voltage balancing of series- connected electrolytic capacitors. The proposed circuit advantageously substitutes the commonly used passive balancing resistors of DC voltage link converters.

What is capacitor balancing?

Also known by literature are systems where the capacitor balancing is based on a specific topology or arrangement of a switch-mode power supply (SMPS), for example, for providing the housekeeping power of the drive inverter. In [7–9], modified fly-back SPMS have been proposed which inherently balance their input voltage.

What factors should be considered when designing a capacitor bank?

When designing a capacitor bank, many factors must be taken into consideration: rated voltage, kvar needs, system protection and communications, footprint and more. These factors govern the selection of the capacitor units to be used, along with proper grouping of these units.