The Application on Active Noise Cancellation - Research on the Series-Parallel Compensated UPS Converter

Xiong, Rui; Liu, Jing; Fuzhong, Li; Wang, Zhi

doi:10.1109/elmagc.2007.4413450

Cited by 5 publications

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“…For a proper SAPF operation it is important that a specific phenomenon, which usually occurs in multi-channel converters, does not occur in the case of the HCT-based system. This phenomenon depends on the possibility of an unbalanced current flow in particular converter channels [24,26]. In the case of the presented solution, due to both current paths in the HCT being controlled independently and considering the typical conditions of a SAPF operation, such an undesirable interaction between the converters is negligible.…”

Section: Basics Of Operation Of the Sapf Based On Hctmentioning

confidence: 97%

“…The concept of cooperation of several interconnected converters is widely used in systems related to electrical drives [20][21][22], converters for renewable energy sources [23] and power supply devices [24][25][26]. In particular, this applies to the use of two (or more) converters connected in parallel, where the output power of one of them is a fraction of the power of the second one.…”

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Bulletin of the Polish Academy of Sciences: Technical Sciences

Gwóźdź

Ciepliński

2021

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This paper presents a concept of a shunt active power filter, which is able to provide more precise mapping of its input current drawn from a power line in a reference signal, as compared to a typical filter solution. It can be achieved by means of an interconnection of two separate power electronics converters making, as a whole, a controlled current source, which mainly determines the quality of the shunt active filter operation. One of these power devices, the "auxiliary converter", corrects the total output current, being a sum of output currents of both converters, toward the reference signal. The rated output power of the auxiliary converter is much lower than the output power of the main one, while its frequency response is extended. Thanks to both these properties and the operation of the auxiliary converter in a continuous mode, pulse modulation components in the filter input current are minimized. Benefits of the filter are paid for by a relatively small increase in the complexity and cost of the system. The proposed solution can be especially attractive for devices with higher output power, where, due to dynamic power loss in power switches, a pulse modulation carrier frequency must be lowered, leading to the limitation of the "frequency response" of the converter. The concept of such a system was called the "hybrid converter topology". In the first part of the paper, the rules of operation of the active filter based on this topology are presented. Also, the results of comparative studies of filter simulation models based on both typical, i.e. single converter, and hybrid converter topologies, are discussed.

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Section: Basics Of Operation Of the Sapf Based On Hctmentioning

confidence: 97%

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confidence: 99%