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Wave recording device of high-voltage frequency converter

A technology of a high-voltage frequency converter and a wave-recording device, which is applied in the field of high-voltage frequency converters, can solve problems such as inability to analyze in detail the startup of the high-voltage frequency conversion device and the inability to provide a correct basis for processing.

Inactive Publication Date: 2017-09-15
希望森兰科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the general high-voltage frequency conversion device has no wave recording function, it is impossible to analyze the start-up, exit, and failure process of the high-voltage frequency conversion device in detail, and it cannot provide a correct basis for subsequent processing.

Method used

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  • Wave recording device of high-voltage frequency converter

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Experimental program
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Embodiment Construction

[0010] see figure 1 , the wave recording unit 1 collects the input voltage signal U1 from the voltage sensor one 13, the input current signal I1 from the current sensor one 14, the output voltage signal U2 from the voltage sensor two 16, and the output from the current sensor two 15 The current signal I2, and the inverter status signal transmitted from the communication interface 19 of the high-voltage inverter.

[0011] The wave recording device of this high-voltage inverter samples the voltage, current, and frequency of the incoming and outgoing lines of the high-voltage inverter at 64 sampling points every 20 milliseconds, and uses the first-in-first-out principle to save samples of 100 cycles, when the following conditions are met: When the device is put into operation, when the device is out of operation, when the device is faulty, and when the device is tested (to meet some test requirements), immediately lock the following waveforms of the first 40 cycles and the last 6...

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Abstract

The invention discloses a wave recording device of a high-voltage frequency converter. A wave recording unit collects from the high-voltage frequency converter an input voltage signal transmitted by a voltage sensor I, an input current signal transmitted by a current sensor I, an output voltage signal transmitted by a voltage sensor II, an output current signal transmitted by a current sensor II, and a frequency converter status signal transmitted by a communication interface of the high-voltage frequency converter. The device is used for monitoring the running condition of the high-voltage frequency converter, and waveform data of each key point when a fault or stop of the frequency converter occurs facilitate later analysis of the cause for the fault or accidental stop of the frequency converter.

Description

technical field [0001] The invention relates to the technical field of high-voltage frequency converters, in particular to the recording and storage technology of input and output voltages and currents of frequency converters, state parameters of frequency converters, and the like. Background technique [0002] As we all know, the shorter the fault process of the power system, the better, the shorter the fault time, the less damage to the equipment, and the more beneficial to the safe and stable operation of the power grid. To this end, it is necessary to understand the whole process before and after the failure, and judge the nature of the accident. The most effective and direct method is to quickly read the fault waveform diagram to understand the whole process of the failure. That is to understand the current, voltage amplitude and phase during the fault process, the nature of the fault, the duration of the fault, and the protection and action time of the circuit breaker....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张树林何树全吕海波
Owner 希望森兰科技股份有限公司