HVDC Data Processing Device TDM Synchronization
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Solution Overview
Problem
High voltage direct current (HVDC) transmission systems using time division multiplexing (TDM) are sensitive to transmission synchronization, which limits their efficiency and requires multiple cable lines and a complex system structure.
Innovation Solution
A data processing device for HVDC transmission systems that generates measurement data units using TDM, incorporating a measurement module, data unit generation parts, and a control unit to manage synchronization signals and error checking, reducing sensitivity to transmission synchronization and simplifying the system structure by minimizing cable lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If TDM is used to transmit measurement data in HVDC systems, then the number of cable lines is minimized, but the system becomes sensitive to transmission synchronization
Solution Approach 1:
The patent segments the transmission process into multiple data units, each with independent synchronization information. This allows each segment to be processed independently, reducing the overall sensitivity to synchronization errors while maintaining the use of minimal cable lines through TDM.
Solution Approach 2:
The patent implements feedback mechanisms where the receiving end detects synchronization status and sends correction signals back to the transmitting end. This feedback loop continuously adjusts timing deviations, maintaining reliable data transmission through TDM without requiring additional cable lines.
2Quantity of substance
If TDM is used for serial transmission of measurement data, then cable line usage is reduced, but system structure becomes complex
Solution Approach 1:
The patent designs a universal data unit structure that can carry multiple types of information (measurement data, synchronization signals, error detection codes) within a single standardized format. This multi-functionality reduces the need for separate transmission channels and simplifies the overall system structure while maintaining minimal cable line usage.
Solution Approach 2:
The patent employs parameter changes in the data encoding scheme, dynamically adjusting certain parameters based on transmission conditions. This allows the system to maintain simplicity in structure while adapting to different operational requirements, reducing the need for complex hardware configurations.
3Loss of information
If multiple data units are transmitted through TDM, then measurement data coverage is improved, but synchronization sensitivity increases
Solution Approach 1:
The patent incorporates preliminary synchronization information within each data unit before transmission. This preliminary action ensures that each data unit can be independently synchronized upon reception, improving measurement data coverage while preventing the accumulation of synchronization errors that would otherwise increase with multiple transmitted units.
Data Source
AI summary
A data processing device is provided. The data processing device in a high voltage direct current (HVDC) transmission system includes a measurement module measuring a voltage or current for one or more points in the HVDC system; and a data processing and control unit generating measurement data units using measurement values measured at the measurement module and performing serial transmission on the generated measurement data units through time division multiplexing (TDM), wherein the data processing and control unit includes a plurality of data unit generation parts, and each of the plurality of data unit generation parts outputs a transmission completion signal representing that the transmission of a measurement data unit is completed.