Intelligent electrical device of master-slave modular structure

Abstract

The invention relates to an intelligent electrical device of a master-slave modular structure, and belongs to the technical field of intelligent power distribution stations. According to the intelligent electrical device, programmable logic controllers are introduced into slave modules, so that operation pressure of a programmable logic controller in a master module is relieved greatly, and system expansibility is remarkably enhanced; the programmable logic controller in the master module does not participate in early-stage data processing, so that system resources are reduced; in occasions with large external extension demands, a low-level processor can be considered so as to reduce system cost moderately; a time comparison module is added to compare time of each module in the device to enable each slave module to have a time mark reference the same as that of the master module during submitting of module information, so that the problem of device protection misjudgment caused by time difference of operation of each device module due to the fact that a conventional electrical device is not configured with uniform time references is solved.

Description

technical field [0001] The invention relates to an intelligent power device with a master-slave module structure, belonging to the technical field of intelligent distribution stations. Background technique [0002] The current intelligent power device has many connections with the backplane, and the distance of the data bus is long. Due to hardware differences, the sampling plug-in often needs to cooperate with the programmable control chip in the main module to perform A / D calibration. When replacing a new sampling plug-in The A / D calibration needs to be re-calibrated from time to time, which is especially inconvenient in on-site maintenance, and the operation and data processing depend on the main PLC. Programmable logic controllers, computing memory chips, etc., are expensive. Moreover, each module of the device has an independent clock system, and there is no internal synchronization clock signal inside, nor is there a time synchronization module that can receive extern...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an intelligent power device with a master-slave module structure to solve the problem that the calculation and data processing of the current intelligent power device rely on the master programmable logic controller, which leads to high cost and lack of time synchronization, which leads to the time reference of each module in the power device. inconsistency problem

Images