Capacitor voltage balancing structure

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 problems should be solved during the capacitor voltage balancing process?

Two typical problems during the capacitor voltage balancing process should be solved, i.e., power fluctuation minimization and determination of the transformer current polarity. Accordingly, this article proposes a balancing control scheme based on the complementary switching-state (CSS) method.

What is capacitor voltage imbalance?

Capacitor voltage imbalance occurs between the HBSMs and FBSMs in hybrid MMCs under a boosted m. The existing voltage balancing method usually requires a large number of computations. In this paper, a simple balancing method based on SVI was proposed. The proposed method was divided into two cases according to m.

Is there a capacitor voltage balance topology?

For the sake of balancing the capacitor voltage of SMs, some researchers have proposed the implementation of the capacitor voltage balance topology in references . Reference marks the first time the diode clamp modular multilevel converter (DCM2C) was put forward.

Can a capacitor voltage balancing method reduce THD?

The Fast Fourier transform (FFT) analysis of the grid voltage has shown that the THD has reduced by 13% by using the proposed method. This paper presents a novel capacitor voltage balancing method in which submodule capacitor voltages can be efficiently balanced without much system complexity and computational effort.

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.