An early warning method for abnormal state of high-speed rail power quality based on dynamic threshold

A power quality and abnormal state technology, applied in the field of power quality monitoring, high-speed rail power quality abnormal state early warning based on dynamic thresholds, can solve problems such as weak research, and achieve high accuracy, reliability, and accuracy. Effect
CN103824129BActive Publication Date: 2017-05-17STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2017-05-17

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Abstract

The invention relates to a high-speed rail power quality abnormal condition prewarning method based on a dynamic threshold. The method includes the following steps of (1) building a high-speed rail power quality prewarning index system, (2) collecting historical power quality data and traction load amount corresponding to the historical power quality data, (3) building a high-speed traction station power quality abnormal state prewarning reference database, (4) detecting a power quality prewarning index abnormal state during online monitoring and prewarning, and (5) prewarning the high-speed rail power quality abnormal state. By means of the historical power quality monitoring data, the high-speed rail traction station power quality abnormal state which is monitored in real time is prewarned, power supply and consumption parties can learn about the high-speed rail traction station power quality abnormal state, power quality potential risks can be found in advance, operation reliability and economical performance of a power grid are improved, and safe operation of the power grid is guaranteed.
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Description

technical field

[0001] The invention relates to the field of power quality analysis, in particular to a power quality monitoring method for power systems and power users, that is, a dynamic threshold-based high-speed rail power quality abnormal state early warning method. Background technique

[0002] Power quality is a description of power supply technical indicators that are related to the safe and economical operation of the power system and can affect the normal production process and product quality of users. It involves three basic elements of voltage and current waveform shape, amplitude and frequency. From this we can see the importance of power quality to the safe and stable operation of power grids and power loads.

[0003] Electrified railway has the advantages of fast speed, strong transportation capacity, long power supply distance, energy saving and cost saving, good traction performance, etc., so it has broad development prospects and is the development direct...

Claims

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