Title:
SINGLE-PHASE ADAPTIVE PHASE-LOCKED APPARATUS AND METHOD
Document Type and Number:
WIPO Patent Application WO/2021/016740
Kind Code:
A1
Abstract:
Disclosed are a single-phase adaptive phase-locked apparatus and method. The single-phase adaptive phase-locked apparatus comprises: a phase detector, a proportional-integral controller, a dynamic wave trap, and a voltage-controlled oscillator, wherein the phase detector is used to obtain a phase error signal according to a single-phase grid voltage signal, and a first output voltage signal from the voltage-controlled oscillator; the proportional-integral controller is used to perform proportional-integral adjustment on the phase error signal, so as to filter out a noise component and a high-frequency component in the phase error signal to generate a first phase deviation signal; the dynamic wave trap is used to perform wave trap processing on the first phase deviation signal, so as to filter out a high-frequency component of a first phase deviation to obtain a second phase deviation signal; and the voltage-controlled oscillator is used to adjust the first output voltage signal to a second output voltage signal according to the second phase deviation signal. The embodiments of the present application can effectively eliminate a high-frequency component in an output signal from a single-phase phase-locked loop, and also take into account the dynamic response and steady-state performance of the single-phase phase-locked loop.
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Inventors:
DENG JIAYONG (CN)
LIU PENGFEI (CN)
WU RENHUA (CN)
LIU PENGFEI (CN)
WU RENHUA (CN)
Application Number:
PCT/CN2019/097888
Publication Date:
February 04, 2021
Filing Date:
July 26, 2019
Export Citation:
Assignee:
SHINRY TECH CO LTD (CN)
International Classes:
H03L7/08
Foreign References:
| CN104901685A | 2015-09-09 | |||
| US20080308141A1 | 2008-12-18 |
Other References:
MAO, PENG: "Research on Key Technologies of Low Power Photovoltaic System", ENGINEERING SCIENCE AND TECHNOLOGY II, CHINA PHD THESIS DATABASE, 15 July 2016 (2016-07-15), XP009525706, ISSN: 1674-022X
MAO, PENG: "Research on Key Techniques of Low-power Photovoltaic Generation System", CHINESE DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, 15 July 2016 (2016-07-15), XP009525706, ISSN: 1674-022X
WANG NA; MU YUANPENG: "Research on Harmonic Restraint Algorithm based on N Trap Filter and Proportional-ResonanT Control", ELECTRIC DRIVE FOR LOCOMOTIVES, no. 2, 10 March 2015 (2015-03-10), pages 61 - 66, XP009525704, ISSN: 1000-128X
PEI, YUJIE ET AL.: "Implementation of Single Phase Locked Loop Based on FPGA and its Application in SVC", ELECTROTECHNICAL APPLICATION, 31 December 2013 (2013-12-31), pages 6 - 9,23, XP009525703, ISSN: 1672-9560
LI, JIN-GE ET AL.: "Single Phase Locked Loop Design Based on Virtual Average Reactive Phase", SCIENCE & TECHNOLOGY VISION, vol. 29, 31 December 2015 (2015-12-31), pages 272 - 273, XP055776555, ISSN: 2095-2457
MANISH BHARDWAJ: "Software Phase Locked Loop Design Using C2000™ Microcontrollers for Single Phase Grid Connected Inverter", TEXAS INSTRUMENTS, 31 July 2017 (2017-07-31), pages 1 - 26, XP055776560, Retrieved from the Internet
MAO, PENG: "Research on Key Techniques of Low-power Photovoltaic Generation System", CHINESE DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, 15 July 2016 (2016-07-15), XP009525706, ISSN: 1674-022X
WANG NA; MU YUANPENG: "Research on Harmonic Restraint Algorithm based on N Trap Filter and Proportional-ResonanT Control", ELECTRIC DRIVE FOR LOCOMOTIVES, no. 2, 10 March 2015 (2015-03-10), pages 61 - 66, XP009525704, ISSN: 1000-128X
PEI, YUJIE ET AL.: "Implementation of Single Phase Locked Loop Based on FPGA and its Application in SVC", ELECTROTECHNICAL APPLICATION, 31 December 2013 (2013-12-31), pages 6 - 9,23, XP009525703, ISSN: 1672-9560
LI, JIN-GE ET AL.: "Single Phase Locked Loop Design Based on Virtual Average Reactive Phase", SCIENCE & TECHNOLOGY VISION, vol. 29, 31 December 2015 (2015-12-31), pages 272 - 273, XP055776555, ISSN: 2095-2457
MANISH BHARDWAJ: "Software Phase Locked Loop Design Using C2000™ Microcontrollers for Single Phase Grid Connected Inverter", TEXAS INSTRUMENTS, 31 July 2017 (2017-07-31), pages 1 - 26, XP055776560, Retrieved from the Internet
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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