Simulation Playback Method of Fault Recording in HVDC Transmission System

Abstract

The invention relates to a simulation replay method for a fault record of a high-voltage direct current power transmission system. The method comprises the steps of acquiring the amplitude and the phase of a fault waveform voltage source of a rectifier station and an inverter station before and after a fault of the high-voltage direct current power transmission system through a data reading module respectively, and adjusting the amplitude and the phase of an ideal voltage source of the rectifier station and the inverter station according to the amplitude and the phase respectively to be consistent with the amplitude and the phase of the fault waveform voltage source; and controlling the on-off states of a fault waveform voltage source circuit breaker and an ideal voltage source circuit breaker through a handover control switch, thus realizing stable handover between the ideal voltage source and the fault waveform voltage source based on fault recording data, avoiding manually adjusting simulation parameters for multiple times, reducing the number of simulations, realizing automatic simulation replay of the fault record of the high-voltage direct current power transmission system and improving the fault replay accuracy and the simulation efficiency.

Description

technical field [0001] The invention relates to the technical field of power system fault simulation, in particular to a simulation playback method for fault recording of a high-voltage direct current transmission system. Background technique [0002] In the actual high-voltage direct current transmission system, when the AC system fails and the DC system cannot operate normally, the secondary system of the converter station will trigger the fault recording system of the converter station, and the signal waveforms of the converter station before and after the fault Save it; if the real fault data of the actual system can be used to replay the fault in the detailed model of the HVDC transmission system, it will help engineers analyze the mutual influence mechanism of the AC and DC systems, optimize and improve the DC control and protection system, and thus improve DC operation. reliability. [0003] However, since the control of the DC system is much more complicated than th...

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Problems solved by technology

[0003] However, since the control of the DC system is much more complicated than that of the AC system, and its electrical quantity signals and control signals are far more than those of the AC transmission system, the corresponding DC model simulation scale is large, and the single simulation time takes a long time, so its failure Simulation playback also faces some difficulties: for example, how to select appropriate fault recording data so that the DC control and protection model can reflect the actual fault situation as realistically as possible; how to improve the accuracy of DC transmission system fault playback and reduce the number of simulations required, Improve the efficiency of fault simulation playback

[0004] The traditional high-voltage direct current system fault recording simulation method does not solve the above technical problems

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