Single-phase bidirectional unit cascade type hybrid two-level rectifier

By adopting a single-phase bidirectional unit cascade hybrid two-level rectifier in the power converter, using a combination design of uncontrolled diodes and bidirectional switch units, the improvement of power quality and energy efficiency is achieved, and the efficiency and adaptation of traditional converters are solved. The lack of characteristics provides a more efficient and stable power conversion solution.

CN119134949AActive Publication Date: 2024-12-13CHINA THREE GORGES UNIV
View PDF 4 Cites 0 Cited by

Patent Information

Application Number
CN202411168126.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-23
Publication Date
2024-12-13
Estimated Expiration
2044-08-23

AI Technical Summary

Technical Problem

In the case of diversified load types and improved power quality requirements, traditional power converters show low efficiency, high control complexity and insufficient harmonic management, making it difficult to deal with different load conditions within a wide range, resulting in power. Inefficient conversion efficiency and unstable system.

Method used

Using a single-phase bidirectional unit cascade hybrid two-level rectifier, four working modes are designed through the combination of uncontrolled diode rectifier bridge arm and bidirectional switching unit, which can dynamically adjust the working mode according to load requirements and grid conditions to achieve more Excellent power quality and energy efficiency, and reduce component quantity and control difficulty through cascading design.

Benefits of technology

Significantly improves the flexibility and adaptability of the system, enhances the efficiency of power conversion, reduces harmonic distortion, can achieve higher energy conversion efficiency within a wide load range, simplifies control and implementation difficulty, and provides more reliable and Efficient power conversion solution.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119134949A_ABST
    Figure CN119134949A_ABST
Patent Text Reader

Abstract

A single-phase bidirectional unit cascaded hybrid two-level rectifier comprises an alternating current power supply vin, uncontrolled diode rectifier bridge arms D1-D4, diodes D5-D14, an inductor L, an inductor L1, an inductor L2, a switch tube S1, a switch tube Sa, a capacitor C and a resistor R. And the diodes D7, D8, D9 and D10 and the switch tube S1 form a bidirectional switch unit. The working mode of the hybrid rectifier can be dynamically adjusted according to load requirements and power grid conditions, so that better electric energy quality and energy efficiency are realized. According to the single-phase bidirectional unit cascaded hybrid two-level rectifier provided by the invention, higher energy conversion efficiency can be realized in a wider load range, and compared with a traditional two-level converter, energy loss can be remarkably reduced.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Controller used for three-phase three-wire Vienna rectifier

    CN103187887A

  • Novel single-phase hybrid three-level rectifier

    CN107896069A

  • Single-phase three-level rectifier with double-tube T-shaped bridge

    CN112865587A

  • Two-level three-phase rectification corrector and control method therefor

    WO2023098217A1