A data modulation method suitable for SRG DC microgrid power line data communication

Abstract

The invention discloses a data modulation method suitable for SRG DC micro-grid power line data communication. The steps are as follows: S1: setting the phase current chopping limit of SRG; S2: determining the value range of the upper and lower thresholds of current chopping; S3: Set different current chopping upper thresholds and current chopping lower thresholds for each signal data that needs to be sent; S4: Set the phase of the selected phase in the DC microgrid system containing SRG corresponding to each signal data that needs to be sent The current magnitude is compared with the corresponding upper and lower thresholds of current chopping, and according to the comparison result, a voltage ripple with a fixed frequency is obtained; S5: Acquire the current chopping frequency corresponding to each signal data to be sent. The invention forms phase current waveforms with different chopping frequencies by selecting different chopping limit values, thereby generating voltage ripples with different frequencies on the output voltage, realizing modulation of different signals, and realizing current limiting protection for the system at the same time Synchronous transmission of signals and electrical energy.

Description

technical field [0001] The invention relates to the technical field of signal and energy synchronous transmission, in particular to a data modulation method suitable for SRG DC microgrid power line data communication. Background technique [0002] Traditional data transmission requires dedicated communication channels and is independent of power transmission lines, such as optical fiber communication and wireless communication. For optical fiber communication, data is transmitted through an independent optical cable, which has the advantages of high reliability, strong anti-interference ability and long transmission distance. However, optical fiber communication has strict requirements on modulation devices and transmission cables, which is inconvenient to move, and the cost of installation and maintenance is relatively high. Wireless communication can transmit data without physical connection, and has the advantages of easy installation, strong adaptability, and good scala...

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Problems solved by technology

[0004] Purpose of the invention: Aiming at the problem that during the synchronous transmission of data and electric energy, the voltage amplitude of the data signal is too large, the power quality is easily affected, and the adjustable range of the data transmission rate is small, the present invention proposes a SRG DC micro Data Modulation Method for Network Power Line Data Communication

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