Fault moment real-time recording method and system of modular UPS

Abstract

The invention relates to a fault moment real-time recording method and system of a modular UPS. The method includes steps: 1) the system is powered on, and a monitoring device acquires operation waveform data of the modular UPS in real time; 2) whether there is remaining storage space in a fault waveform memory is checked, if not, new acquired waveform data covers original data in the fault waveform memory, and if yes, new obtained waveform data is stored; 3) according to the operation waveform data of the modular UPS, whether a fault occurs is determined; if yes, the waveform data before and after a fault point in the fault waveform memory is stored in an EEPROM, and step 4) is executed; and if not, step 2) is returned to; and 4) the waveform data before and after the fault point is converted to digital waveforms, the state during occurrence of the fault is restored, and the reason of fault occurrence is analyzed. Compared with the prior art, the method and system is advantaged by visuality and accuracy, data acquisition diversity, and real-time monitoring.

Description

technical field [0001] The invention relates to a wave recording method, in particular to a real-time wave recording method and system for a modularized UPS at fault time. Background technique [0002] In the modular UPS, in order to facilitate the analysis of the cause of the failure after the failure of the module, the way of event recording is generally used at present, which can record the set events before and after the failure. However, some faults occur in a very short time. This event recording method cannot restore the external and internal conditions before and after the fault, and cannot perform accurate fault cause analysis. [0003] Chinese patent CN202916412U discloses a fault recording device for a generator transformer set, including a data acquisition unit, a data analysis unit, a data recording unit, a data output unit and a software part. The data acquisition unit includes an AC voltage channel and an AC current channel, It also includes a DC voltage chan...

AI Technical Summary

Problems solved by technology

However, some faults occur in a very short time. This event recording method cannot restore the external and internal conditions before and after the fault, and cannot perform accurate fault cause analysis.

[0003] Chinese patent CN202916412U discloses a fault recording device for a generator transformer set, including a data acquisition unit, a data analysis unit, a data recording unit, a data output unit and a software part. The data acquisition unit includes an AC voltage channel and an AC current channel, It also includes a DC voltage channel with a suitable voltage level. This device can realize long-term real-time monitoring of the AC voltage, synchronous voltage and DC system voltage of the UPS, but the device cannot handle short-term fault conditions, resulting in the inability to accurately analyze the cause of the fault.

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