Digital substation power quality fault recording monitoring device and monitoring method

Abstract

The invention relates to a digital transformer station electric energy quality fault recording monitoring device and method. The device comprises a signal receiving unit, a message analysis unit, a stable recording unit, an electric energy quality fault recording analysis unit, an information interaction unit, and a power supply unit. The message analysis unit is connected with the signal receiving unit, the stable recording unit, and the electric energy quality fault recording analysis unit. The information interaction unit is connected with the stable recording unit and the electric energy quality fault recording analysis unit and performs data interaction with an external portion. The power supply unit supplies power to each unit. A transformer station fault monitoring device is integrated with electric energy quality fault monitoring and fault recording patented technology so as to provide comprehensive fault monitoring waveforms, trace fault sources, provides valid basis for fault decision, achieve concentrated data management, power system operation data and fault data sharing and synchronization, and synthesis, connection and cause and effect analysis of the overall operation state and defect of the power system.

Description

technical field [0001] The invention relates to the technical field of digital substation fault monitoring in electric power systems, in particular to an integrated monitoring method for digital substation power quality fault recording wave recording. Background technique [0002] The digital substation is the same as the conventional substation. Due to the non-linearity and impact of the load nature, and the influence of factors such as faults in the interconnected lines in the power grid, lightning overvoltage and operating overvoltage invasion, there will also be sudden changes in grid fault waveforms, harmonics, etc. Steady-state waveform faults such as exceeding the standard, flicker exceeding the limit, and three-phase unbalance, as well as unsteady-state waveform faults such as voltage sag, transient overvoltage, and transient overvoltage. In the existing power system, each electrical quantity monitoring equipment is in its own array, such as a fault recorder used to ...

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Problems solved by technology

The hardware equipment of this invention patent does not have the continuous steady-state wave recording function required by the wave recording device, and also cannot meet the 10mins data window wave recording function required by the voltage flicker

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