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Carrier synchronization method and system when multiple converters work in parallel

A carrier synchronization and converter technology, applied in the field of converters, can solve the problems of increasing the complexity of the software architecture and increasing the communication pressure, so as to reduce the influence of the software architecture and communication pressure, and improve the anti-interference ability.

Active Publication Date: 2020-04-07
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These mean that the software architecture needs to be adjusted to meet the requirements of carrier synchronization, which increases the complexity of the software architecture and increases the communication pressure

Method used

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  • Carrier synchronization method and system when multiple converters work in parallel
  • Carrier synchronization method and system when multiple converters work in parallel
  • Carrier synchronization method and system when multiple converters work in parallel

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] This embodiment provides a carrier synchronization method when multiple converters work in parallel, see image 3 , the carrier synchronization method comprises the steps of:

[0050] S31: Using the modulated wave signal to modulate the original synchronous signals sent by the main controllers in the multiple converters to obtain a carrier synchronous clock signal.

[0051] The converters include a controller, and the controller of one of the multiple ...

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Abstract

The invention provides a carrier synchronization method and system during parallel operation of multiple converters. The method comprises the following steps: modulating an original synchronization signal sent by a master controller in a plurality of converters by using a modulation wave signal to obtain a carrier synchronization clock signal, and transmitting the carrier synchronization clock signal to each slave controller in the plurality of converters to perform carrier synchronization, wherein the frequency of the modulated wave signal is lower than that of the original synchronous signal, and the modulated carrier synchronous clock signal is consistent with the modulated wave signal in frequency, so that the frequency of the carrier synchronous clock signal is lower than that of theoriginal synchronous signal, and the carrier synchronous clock signal is suitable for long-distance transmission. Compared with the scheme of carrying out carrier synchronization by using the communication conversion module, the scheme of the invention does not need to transmit a synchronization signal while transmitting a conventional signal, so that the influence on a software architecture and communication pressure is reduced.

Description

technical field [0001] The present invention relates to the technical field of converters, more specifically, to a carrier synchronization method and system when multiple converters work in parallel. Background technique [0002] When multiple converters work in parallel, because the carrier frequency of different converters is determined by their respective controllers, and the generation of the carrier frequency is obtained by a series of transformations of oscillator circuits such as crystal oscillators, due to the discreteness of the oscillator circuit It will cause the carrier frequency of each controller to deviate, and this carrier frequency deviation will cause a series of problems in the system. In the inverter application, there are two main influences: one is the sub-harmonic oscillation problem, and the other is the common-mode current circulation problem in the non-isolated system. [0003] In order to solve the problem of carrier frequency inconsistency when m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2657H04L27/2691Y02P90/02
Inventor 赵为庄加才徐君
Owner SUNGROW POWER SUPPLY CO LTD
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