A virtual secondary device in the process layer of a smart substation and its implementation method

Abstract

The invention relates to a virtual secondary device of the process layer of an intelligent substation and an implementation method thereof. The device includes: a CPU board, which simulates sending process layer SV sampling message data; simulates sending and receiving GOOSE message data of the process layer, and realizes IRIG‑B time synchronization; bus backplane for bus communication between all boards; power supply board for supplying power to the device. The technical solution provided by the present invention can replace real merging units and intelligent terminals to participate in detection and debugging, and can set analog data values ​​according to debugging requirements, so as to realize the construction of a simulation debugging environment for the entire substation.

Description

Technical field: [0001] The invention relates to the field of electric power automation, and more specifically relates to a model-driven intelligent substation process layer virtual secondary device and an implementation method thereof. Background technique: [0002] The application of the IEC61850 standard has promoted the transformation of substations from analog quantity acquisition to digital acquisition, and gradually developed from digital substations to smart substations. Now it has become an important basic technology for the development and construction of smart substations. One of the typical characteristics of the IEC61850 standard is that it adopts a standard information model to realize the modeling of all data, and realizes the interoperability between devices of different manufacturers through typical transmission methods such as SV, GOOSE, and MMS. [0003] Since all data in the smart substation is transmitted based on the network, the detection and debugging...

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Problems solved by technology

However, some current digital testers mostly use manual configuration for the structure, parameters and data of the analog message, and the configuration workload is relatively large during simulation.

[0005] There is also an improved digital tester that can simulate the sending of messages by obtaining the model of the device, but it can only simulate the data of a single device, or only realize the simulation of a single device. When there are merging units and smart terminals at intervals, it is difficult to meet the test requirements with only one tester. Due to the actual testing and debugging environment, it is impossible to purchase a large number of real merging units and smart terminals for debugging. The real equipment is all private equipment of each manufacturer, which is not universal, and it is difficult to meet the ever-changing debugging needs of different substations in the future

[0006] Although there are related software tools that can simulate and send SV sampling messages and GOOSE messages, since such software mostly runs on WINDOWS systems, it is difficult to meet the real-time requirements of the project. The discrete requirements for sending text messages are less than lOus, and the delay for network transmission of GOOSE messages is less than 3ms. The software running on notebooks or desktops is all WINDOWS systems, and the task scheduling time is tens or even hundreds of milliseconds. Unable to meet the application requirements of industrialization

[0007] As of the beginning of 2014, the State Grid Corporation of China has built more than 840 smart substations, and thousands of smart substations are planned to be built in the future. Especially with the large-scale construction of smart substations in the future, the number of new smart substations is also increasing. The detection and debugging workload will also increase

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