Dynamic process online monitoring device for electric power system and method thereof

Abstract

The present invention provides a dynamic process online monitoring method for an electric power method. The method uses monitoring apparatuses for a multi-channel collecting at high speed, automatically recording, storing, and displaying electric quantity, which can collect each voltage, current, active power, reactive power, frequency, switching value and the like realtimely through multiple channels at high speed. The method comprises circularly collecting 100mS data according to the set parameters, comparing realtimely, recording the data for 10 min if any channel accords with the starting condition, storing the recorded data to the hardware, and then returning the initial part, and continuing the collecting and calculating. The method can calculate transient harmonics (up to 50 orders) of any part of data wave at the same time, give the total harmonic distortion, each harmonic ratio and each harmonic value. The method employs advanced and stable Linux multitask operating system, the whole software uses Web / Brower mode, and professional offline data analysis software is also provided.

Description

technical field [0001] The invention relates to a method for on-line monitoring of the dynamic process of an electric power system, in particular to a method for on-line monitoring of the dynamic process with multiple channels, high acquisition speed and long time. technical background [0002] Faults and disturbances sometimes occur in the power system during operation, causing harm to the power system and users. In order to analyze the phenomena in the transient process of faults and disturbances, it is necessary to conduct online tracking and monitoring of electrical parameters such as current and voltage. The main equipment operating in the power system, including: generators, transformers, transformers, lightning protection and lines, etc., need to collect electrical quantities in real time and record their changing trends. Record the system current, voltage and its derivatives caused by large disturbances, such as the whole process changes of active power, reactive pow...

AI Technical Summary

Problems solved by technology

[0003] The existing on-line monitoring methods of the power system are mainly to monitor the status of the equipment, which can only record the steady-state electrical quantity under the power frequency, but cannot record the monitoring devices for transient processes such as overvoltage and overcurrent.

High-speed fault recording has high acquisition speed and good channel synchronization, but due to the difficulty of acquisition technology and serious signal interference, at the same time, the safety and stability of the equipment are relatively poor, and it is easy to damage equipment components

The microcomputer fault recording device should focus on the positioning of the recorded information, the authenticity and safety of the recorded data, etc., but there are many deficiencies in the transient measurement and start-up methods, mainly due to the restrictions on the direction of national standards. Transient test performance of fault recording

[0004] To sum up, at present, the main deficiency of the online monitoring device for the dynamic process of the power system is that the waveform acquisition part in the sampling time is too short, resulting in incomplete records of fault phenomena; at the same time, the starting method is judged by the amount of faults, so it involves non-fault causes It is often not started, resulting in incomplete recording of the dynamic process; there are not many analysis methods for dynamic data, especially transient waveform analysis methods, which is not conducive to technicians to analyze the cause of accidents

Images