Research On Intelligent Test Of Device Data Model For Digital Protection Equipment

The SCD file includes information on all devices in the substation,and the monitoring system of substation uses the SCD file to connect devices.The actual configuration of the device is split from the SCD file and the project-related instantiated device configuration file.However,on one hand,some manufacturers may have changed the device configuration file due to changes in device functionality,On the other hand,there are multiple versions of the SCD file for monitoring system.These conditions may result in inconsistencies between the device configuration file and the SCD file used by the monitoring system.When the monitoring system operates through the gateway to each IED device of the interlayer,once the monitoring system issues an operation command to a device,the corresponding response may be incorrect,which will make the entire substation system disorder.In this thesis,the intelligent test platform for data model of digital protection device is studied,which has certain theoretical significance and engineering application value.The main contents of this thesis are as follows:Firstly,the source of the device data model file and the reason for the discrepancy between device data model and the SCD file or the "six unified" file are described,which present the concept of intelligent test of device data model.According to the characteristics of string in device data model,a string comparison algorithm is proposed,and the effectiveness of the application in the test of device data model is verified with a data example.Secondly,a key word matching algorithm between data of device data model is presented in this thesis.The method of establishing key font file is introduced,on the basis of RMM algorithm,a method of string word segmentation is proposed,and on the basis of the word segmentation algorithm,combined with the string comparison algorithm of device data model,the matching degree between data is calculated,then match the data according to the matching degree and complete the keyword matching between the data.Then,the composition of the equipment data model file established according to IEC 61850 standard is introduced in this thesis.According to the structural characteristics of the file and based on the string comparison algorithm,the keyword matching algorithm,a device data model matching algorithm is proposed.The concrete realization process of the algorithm is described,also the software implementation of the algorithm and the calling process between the algorithms are introduced.Finally,the design process and test interface of the intelligent test system of device data model are introduced.Moreover,a method of keypad maintenance is proposed,and the software development process of the device data model intelligent test is introduced,including the graphical design,interaction between interface and background program and the method of interface calling device data model intelligent matching algorithm.Lastly,the test system is verified by taking the PL5802A device of 500kV Hexiang substation in Liaoning Province as an example.The intelligent test is realized,which reduces the workload and improves the accuracy of the test.