Second Harmonic Current Reduction Techniques for Single-Phase Power Electronics Converter Systems

Two-stage single-phase converters are used for dc-ac and ac-dc power conversion, but second harmonic current (SHC) can flow into the dc-dc converter, the dc voltage source, and the dc load. This book proposes SHC reduction control schemes for the dc-dc converter, with different topologies and/or different operating modes, and the second harmonic current compensator (SHCC) to compensate the SHC, leading to extended system lifetime and enhanced system stability.

Format: Hardback
Length: 288 pages
Publication date: 25 May 2022
Publisher: Springer Verlag, Singapore

Two-stage single-phase converters, such as two-stage single-phase DC-AC inverters and two-stage single-phase PFC converters, play a crucial role in interfacing power converters between DC and AC voltage/current sources. These converters have gained widespread application in DC-AC and AC-DC power conversion processes. In the case of two-stage single-phase converters, the AC-side power pulsates at twice the AC voltage frequency, leading to the generation of second harmonic current (SHC). This SHC can flow into the DC-DC converter, the DC voltage source, and the DC load, causing potential issues.

This book aims to clarify the generation, propagation, and side-effects of SHC in two-stage single-phase converters. It proposes SHC reduction control schemes for DC-DC converters, considering different topologies and operating modes. The second harmonic current compensator (SHCC) is then introduced to compensate for SHC, significantly reducing the DC bus capacitance. By removing electrolytic capacitors from the two-stage single-phase converter, the system lifetime is extended, and system stability is enhanced.

To achieve flawless SHC compensation performance, port-current control schemes are proposed for the SHCC. Furthermore, stability analysis is conducted for the two-stage single-phase converter with the addition of SHCC. This book serves as a comprehensive resource, combining theoretical analysis and engineering design. It caters to master students, Ph.D. students, and teachers specializing in power electronics, as well as electrical engineers engaged in research and development of LED drivers, EV on-board chargers, railway auxiliary power supplies, aviation power supplies, and renewable energy generation systems.

In conclusion, two-stage single-phase converters with SHC compensation have become essential in power conversion applications. This book provides valuable insights into the generation, propagation, and control of SHC, offering practical solutions for DC-DC converters. By integrating SHCC, the system lifetime is extended, stability is improved, and the overall performance of power conversion systems is enhanced.

Weight: 635g
Dimension: 235 x 155 (mm)
ISBN-13: 9789811915468
Edition number: 1st ed. 2022