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Title:
NO-COMMUNICATION GLOBAL MODULATION SIGNAL SYNCHRONIZATION CONTROL METHOD AND SYSTEM BASED ON PHASE-LOCKED LOOP
Document Type and Number:
WIPO Patent Application WO/2020/048001
Kind Code:
A1
Abstract:
A no-communication global modulation signal synchronization control method and system based on a phase-locked loop. Several grid-connected inverters have the same structure. A modulation signal synchronization control method for each grid-connected inverter is the same, and comprises: acquiring a grid voltage phase signal and generating, by means of signal processing, a triangular carrier phase signal required for pulse width modulation of the grid-connected inverter, wherein the grid voltage phase signal and the triangular carrier phase signal are synchronization signals; and the grid voltage phase signal in each grid-connected inverter is the same, thereby realizing the synchronization of pulse width modulation signals between multiple grid-connected inverters. The system and method do not require communication signals, and can effectively realize the synchronization of modulation signals between multiple inverters.

Inventors:
GAO FENG (CN)
XU TAO (CN)
HAO TIANQU (CN)
MENG XIANGJIAN (CN)
HAO QUANRUI (CN)
ZHANG ZHENBIN (CN)
WU QIANG (CN)
ZHANG CHENGHUI (CN)
Application Number:
PCT/CN2018/115559
Publication Date:
March 12, 2020
Filing Date:
November 15, 2018
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Assignee:
UNIV SHANDONG (CN)
International Classes:
H02J3/40; H02M1/088
Foreign References:
CN107112921A2017-08-29
CN104953878A2015-09-30
CN103746582A2014-04-23
CN104868769A2015-08-26
CN105337313A2016-02-17
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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