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Safety control method, equipment and system for photovoltaic system

A photovoltaic and photovoltaic panel technology, applied in the field of communication systems, can solve problems affecting normal business inquiries, poor channel quality, and affecting communication speeds

Active Publication Date: 2018-07-06
HUAWEI DIGITAL POWER TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, under this security mechanism, the heartbeat frame will occupy a part of the bus bandwidth and affect the communication rate. In severe cases, it may affect the normal business query
At the same time, the bus occupation may lead to poor channel quality and abnormal heartbeat, thus falsely triggering the safety protection measures of the heartbeat mechanism
Therefore, the bus bandwidth occupation of the heartbeat protection mechanism has become an urgent problem to be solved

Method used

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  • Safety control method, equipment and system for photovoltaic system
  • Safety control method, equipment and system for photovoltaic system
  • Safety control method, equipment and system for photovoltaic system

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Embodiment Construction

[0027] In order to facilitate the understanding of the embodiments of the present application, the elements involved in the description of the embodiments of the application are explained below to help understand the description of the embodiments, but this does not limit the scope of protection of the present application.

[0028] Photovoltaic system: Solar photovoltaic system, also known as photovoltaic system, referred to as photovoltaic system, refers to a power generation system that converts solar energy into DC power by using the photovoltaic effect of photovoltaic semiconductor materials.

[0029] PLC: Power line communication (power line communication), also called carrier communication, refers to a communication method that uses existing power lines to transmit data or information by digital signal processing methods.

[0030] MAC layer: Media Access Control (MAC) sublayer, which is the lower part of the data link layer in the local area network, provides addressing a...

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Abstract

The application provides a safety control method, equipment and system in a power line communication (PLC) system. The method includes the following steps: a communication slave receives a query framefrom a communication host, wherein the query frame includes a query command or a control command, and communication address information of a target communication slave; when the communication slave does not receive the query frame within a given time interval, the communication slave determines that the communication between the local machine and the communication host is abnormal and adopts a power-off protection operation on a photovoltaic panel that is controlled by the communication slave; and if the query frame is received after the communication slave performs the power-off protection operation on the photovoltaic panel, the communication slave determines that the communication between the communication slave and the communication host returns to a normal state, and the communication slave cancels the power-off protection operation.

Description

technical field [0001] The present application relates to the field of communication systems, and in particular to a method, device and system for heartbeat protection safety control in a power line communication (PLC) communication system. Background technique [0002] A solar power system includes components such as inverters, photovoltaic panels, and optimizers. Each or two photovoltaic panels are controlled by an optimizer, and the output of each optimizer is connected in series to form a DC high-voltage string, which is connected to the inverter. The inverter and the optimizer transmit information through power line communication (PLC) communication, wherein the inverter is a PLC communication master, and the optimizer is a PLC communication slave. The inverter and the optimizer will perform information interaction operations such as business query and command control through PLC communication. [0003] The DC output of each optimizer will receive an inverter to contr...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04L12/26
CPCH04B3/546H04L43/10
Inventor 水伟沈衍柏
Owner HUAWEI DIGITAL POWER TECH CO LTD
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