Automatic test system and test method for intelligent substation protection device
An automatic test system and smart substation technology, applied in transmission systems, measuring devices, digital transmission systems, etc., can solve the problems of unable to achieve synchronous output and affect the normal operation of other operating equipment, so as to reduce power consumption and ensure synchronization Effect
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Embodiment 1
[0076] Such as Figure 5 As shown, the present invention provides an automatic test system for an intelligent substation protection device. The automatic test system for the intelligent substation protection device includes a digital-analog integrated tester, a protection device, an intelligent terminal, and an interval merging unit. The digital-analog integrated The chemical tester collects the tripping and exit information of the intelligent terminal through the input volume collection plug-in. The intelligent terminal is connected to the protection device through GOOSE optical fiber, and bidirectionally transmits digital signals. The interval merging unit is connected to the protection device through the SV optical fiber, and the sampling values of the analog current and voltage of the interval merging unit are transmitted to the protection device. The digital-analog integrated tester is connected to the interval merging unit through the SV optical fiber based on FT3, an...
Embodiment 2
[0149] For the bay merging unit, under real operating conditions, its current and line extraction voltage come from the current transformer and voltage transformer of this bay, which are analog input. The bus voltage collection comes from the cascaded voltage output by the bus merging unit, and the cascaded voltage output by the bus merging unit to the interval merging unit is in the form of a digital message.
[0150] According to the functions of the existing relay protection tester, it can only choose to output the analog quantity or the digital quantity message separately. If it is necessary to inject test quantity into the bay merging unit through the relay protection tester, it is necessary to inject analog current into the bay merging unit and inject analog voltage into the bus merging unit. However, the bay merging unit and the bus merging unit are generally far apart, which is inconvenient for cable connection, and the bus merging unit still needs to output voltage to...
Embodiment 3
[0175] The difference between Embodiment 3 of the present invention and Embodiment 1 is that: the PC upper computer adopts a wired interaction scheme, the specific protection device is connected to the photoelectric converter through a network cable, and the digital-analog integrated tester is connected to the photoelectric converter through an SV optical fiber. Connection, the photoelectric converter is connected to the PC host computer through the RJ45 interface. A photoelectric converter is used to convert the optical fiber interface into an RJ45 interface, and the RJ45 interface is used as a communication port to realize the wired communication connection between the PC host computer and the digital-analog integrated tester.
[0176] The working process and working principle of Embodiment 3 of the present invention are as follows: due to the long distance between the protection device and the digital-analog integrated tester, if the method of laying wired communication cabl...
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