Automatic detection system and method of secondary virtual loop of intelligent transformer station

Abstract

The invention provides an automatic detection system and method of a secondary virtual loop of an intelligent transformer station. The automatic detection system comprises an automatic test system and virtual terminal simulated output subsystems, wherein the virtual terminal simulated output subsystems are disposed in secondary intelligent electronic devices. According to communication links and virtual terminal loop information in an SCD file, the automatic test system sends a test control command to spacing-layer and process-layer devices via the GOOSE internet to drive virtual terminal simulated output of the devices, response to test excitation of the devices is obtained from the MMS internet and the GOOSE internet to automatically determine a test result, and the correctness of the virtual loop is verified. According to the system and method of the invention, whether virtual terminals of point-to-point and networking ports of the devices are correctly connected can be determined needless of dismounting fibers among the devices, changing configuration of the virtual terminals or adding external testers, the debugging-verifying efficiency and correctness of the secondary virtual loop are improved, and stable and reliable operation of the secondary system of the intelligent transformer station is ensured.

Description

technical field [0001] The invention provides an automatic detection system and method for a secondary virtual circuit of an intelligent substation, which belongs to the technical field of the intelligent substation of a power system. Background technique [0002] Smart substation is one of the major technical issues in building a strong smart grid, and it is also an important supporting node for smart grid construction. Under the IEC61850 standard system, smart substations replace the hard cable connections of traditional substations with digital virtual secondary circuits. Become the main carrier of information exchange between IEDs (Intelligent Electronic Devices). Virtual terminal is a general term for describing the logic connection points of IED’s GOOSE and SV input and output signals. It is used to identify the process layer, interval layer and the secondary circuit signal connected between them. There is a corresponding relationship with the screen terminal of the t...

AI Technical Summary

Problems solved by technology

[0004] (1) A typical 220kV smart substation has thousands of virtual loop connections, thousands of optical fibers, and a large number of virtual loops. It is inevitable that there will be a long debugging time

Moreover, during the debugging process, the SCD file is constantly being modified and verified, which increases the debugging time of the secondary circuit of the entire substation

In addition, due to the difference of personal experience, manual detection may have the problem of omission

[0005] (2) The merging unit and smart terminal of the smart substation are installed in the primary equipment field, and the implementation of the virtual circuit is difficult to verify by applying the test stimulus through the tester

But at the same time, it also brings several problems: firstly, the loop test is incomplete, and after the test is completed and the fiber is restored, the problem of poor signal occurs frequently; thirdly, frequent plugging and unplugging of the fiber may cause damage to the fiber connector, which is likely to shorten the life of the equipment. Bring equipment security risks

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