Method and apparatus used for controlling variable frequency drive system

Abstract

The present invention discloses a method used for controlling a variable frequency drive system. The method comprises: obtaining current running status data that contains a status flag and fault status data of the variable frequency drive system; when the current running status data contains a fault status flag, performing reason analysis on a current fault by using a preset fault analysis network, determining a fault event, and obtaining a fault reason category corresponding to the fault event; and generating a fault response and control policy for the fault reason category by using the faultanalysis network according to the fault event and the reason category thereof, and feeding back the fault response and control policy to a controller of the variable frequency drive system, to control the variable frequency drive system. According to the method and the apparatus used for controlling the variable frequency drive system, functions of real-time monitoring, fault determining and instruction maintenance of the drive system are implemented, and when the drive system stably runs, an outage effect on the system caused by a fault is reduced. The present invention has a characteristicof high reliability.

Description

technical field [0001] The invention relates to the technical field of frequency conversion transmission system control, in particular to a method and device for controlling a frequency conversion transmission system. Background technique [0002] At present, users have higher and higher requirements for the reliability of frequency conversion drive system. According to data statistics, in actual operation, more than 60% of the failure protection shutdown of the transmission system is caused by user operations, sudden changes in external conditions, etc., and the unrecoverable faults due to the system itself only account for less than 20% of the failure protection shutdown. . [0003] During the operation of the frequency conversion drive system, the reasons for the fault protection shutdown are mainly divided into the following three types: a. User operation: if the user handles emergency shutdown, the user does not operate according to the start / stop and operation procedu...

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Problems solved by technology

Because the above three types of reasons will lead to system protection downtime, but these three types of reasons have different impacts on the subsequent normal operation of the system. In the prior art, after the fault protection shutdown, on-site maintenance is usually required by product maintenance personnel. And manually reset, the system cannot be put into operation during this period, which brings practical troubles to users

[0004] However, most of the reasons for the above-mentioned fault protection shutdown can be restored to the standby state for the variable frequency drive system. Therefore, for the prior art for the variable frequency drive system, it is less involved in analyzing these types of reasons and starting the corresponding For the deficiencies of the fault-tolerant operation mechanism, the present invention needs to judge and classify the operation state and fault state, and take corresponding protection measures

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