Method and system for improving reliability of valve-controlled serial communication

Abstract

The invention discloses a method and a system for improving reliability of valve-controlled serial communication. The method comprises the following steps: sampling data of a plurality of points of different phases; and analyzing a sampling value, and outputting analysis data by any data frame which is verified to be correct. The system comprises a sampling device which is used for sampling multi-point data of different phases; and an analysis device which is used for analyzing a sampling value and outputting analysis data by any data frame which is verified to be correct. The invention provides a method and a system for improving reliability of valve-controlled serial communication, and provides a method for preventing and correcting errors in a single communication period, which adopts a three-point sampling and parallel analysis mode during Bit value sampling in a serial data frame to more reliably collect single-Bit data so as to avoid single-Bit data collection interference of the data frame, and avoid data packet loss. Therefore, the communication reliability of a communication link layer is improved.

Description

technical field [0001] The invention relates to the technical field of ultra-high voltage direct current transmission, in particular to a valve-controlled serial communication reliability improvement method and system. Background technique [0002] In recent years, UHVDC transmission has become an important transmission method for west-to-east power transmission and clean energy transmission; and its proportion in the field of power transmission has increased year by year; HVDC transmission has become an important part of the main grid of my country's power grid. Converter valves and valve control systems are the core equipment of UHVDC converter stations, carrying the conversion function between AC and DC. [0003] At present, the update and replacement of valve-controlled products will inevitably become an important link in the development of UHV DC; the replacement of domestically-made valve-controlled products will also become an important guarantee for UHV DC transmissi...

AI Technical Summary

Problems solved by technology

[0004] At present, in the serial communication mode of the valve control system, the underlying data transmission adopts the single-point sampling mode, and in the routine value processing (such as figure 2 As shown), the data of single-point sampling Bit_cnt=5 (the middle position, the most stable moment in theory) is used as the effective Bit data for analysis, assuming that the existing "disturbance" happens to occur at Bit_cnt=5, it will lead to the analysis of the frame data Error; causing data packet loss

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