High-reliability HDLC communication information verification method applied to flexible DC valve base control system

Abstract

The invention provides a high-reliability HDLC communication information verification method and device applied to a flexible DC valve base control system, and the method comprises the steps: adding checksum check, word check, and connection judgment at an application layer; performing CRC check of received data, wherein the data includes a frame header, user data R0 to R6, a checksum check code R7, and a CRC check code; performing the checksum check of the data after the CRC check is passed; performing the word check of the data after the checksum check is passed; performing the connection judgment of the data after the word check is passed. According to the technical solution provided by the invention, the method enables the HDLC communication of a flexible DC transmission system VBC tohave high stability and reliability. In the case of a correct packet, the method can guarantee that the message passes the check; in the case of a packet error, the method can screen out an error packet quickly and reliably, and reports the error packet.

Description

technical field [0001] The invention belongs to the technical field of data communication, and in particular relates to a high-reliability HDLC communication information verification method and device applied to a flexible straight valve base control system. Background technique [0002] The converter valve is responsible for DC-AC conversion and AC-DC conversion in the DC transmission project, and is the core equipment of the DC transmission project. When flexible DC transmission modular multilevel (MMC) converter valve technology is applied in the field of HVDC transmission, hundreds or even thousands of sub-modules need to be connected in series, and each sub-module must be independently controlled, protected and monitored. As the interface device between the control protection system and the converter valve, the valve base control system VBC is responsible for the operation control and safety protection of all sub-modules, the entire bridge arm and even the whole system ...

AI Technical Summary

Problems solved by technology

At present, the VBC communication method mostly adopts a single verification method, which only performs a single verification at the link layer or application layer, and there is no clear fault location method after the verification

As a result, it is impossible to quickly and effectively locate the type of data transmission error, resulting in abnormal data communication failures that occur from time to time, but it is difficult to locate and solve them

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