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DC Bus Second Harmonic LC Filter with Solid-State Tuning Restorer

Mukhopadhyay, A and John, V (2022) DC Bus Second Harmonic LC Filter with Solid-State Tuning Restorer. In: 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022, 20 - 24 March 2022, Houston, pp. 457-463.

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Official URL: https://doi.org/10.1109/APEC43599.2022.9773433


Second harmonic filters are essential for the operation of single-phase converters. The presence of second harmonic ripple not only worsens the converter performance but also causes premature failure of DC bus circuit components. Though LC-tuned filters are well adopted as second harmonic filters due to their cost, reliability, and performance, their efficacy deteriorates when grid frequency or filter parameters deviate. On the other hand, active filters offer consistent and superior filtering performance at the cost of additional switches, usually of rating comparable to those of the main converters. Also, the main converter functions satisfactorily as long as the added switches are functional. The above concerns are addressed by the proposed filter configuration. It employs an auxiliary converter that enhances the performance of LC-tuned filter while using switches of much lower ratings. Moreover, the failure or nonavailability of the auxiliary converter does not completely disrupt the operation of the main converter. The performance of the proposed filter is verified in an experimental prototype which shows effective second harmonic filtering.

Item Type: Conference Paper
Publication: Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords: Harmonic analysis; Passive filters; Power converters, Converter performance; Harmonic filter; LC filter; LC-tuned filter; Performance; Second harmonic ripple; Second harmonics; Single phase converter; Solid state tuning restorer; Tuned filter, Tuning
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 27 Jun 2022 07:12
Last Modified: 27 Jun 2022 07:12
URI: https://eprints.iisc.ac.in/id/eprint/73986

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