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Delay measuring method of merging unit and system thereof

A measurement method and technology of measurement system, applied in measurement devices, measurement of electrical variables, instruments, etc., can solve the problems of lack of strictness in merging unit links and lack of measurement delay.

Inactive Publication Date: 2010-12-29
EAST CHINA ELECTRIC POWER TEST & RES INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Usually, there are strict regulations on the angular difference of the transformer itself to match the application of related secondary equipment, but there are no strict product regulations for the additional merging unit link, and its delay is often much larger than that of the transformer itself, so , in practical applications, it is necessary to accurately measure its delay
However, there is currently no way to measure the delay

Method used

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  • Delay measuring method of merging unit and system thereof
  • Delay measuring method of merging unit and system thereof
  • Delay measuring method of merging unit and system thereof

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Embodiment Construction

[0032] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] see image 3 , the present invention discloses a merging unit delay measuring system 10 for measuring the merging unit delay. The delay measurement system 10 includes a signal source output device 11, a collector 12, a recording device 13, and a delay measurement unit (not shown).

[0034] Wherein, the signal source output device 11 is used to synchronously output the analog signal and the switch signal; the switch signal is connected to the recording device 13; after the analog signal is converted into a digital signal by the collector 12, it is connected to The merging unit 20 is connected to the recording device 13 after passing through the merging unit 20 . In this embodiment, the signal source output device 11 is a relay protection tester; of course, other signal source output devices can also be selected.

[0035] The collecto...

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Abstract

The invention discloses a delay measuring method of a merging unit and a system thereof. The delay measuring system comprises a signal source output device, a recording device and a delay measuring unit, wherein, the signal source output device is used for outputting an analog value signal and a switching value signal, the switching value signal is switched in the recording device, and the analog value signal is converted into a digital signal, then switched in the merging unit and switched in the recording device through the merging unit; the recording device is used for recording wave forms of the received analog value signal and the switching value signal; and the delay measuring unit is used for acquiring delay data of the merging unit according to wave form information recorded by the recording device. The delay measuring method of the merging unit and the system thereof can help measure signal conversion delay of the merging units of different models and different manufacturers accurately and solve the problem that different merging units generate phase errors on differential protection and other relevant secondary equipment during the use process to cause abnormal operation or protection misoperation.

Description

technical field [0001] The invention relates to a combination unit of an electronic current transformer, in particular to a method for measuring the time delay of the combination unit; in addition, the invention also relates to a system for measuring the time delay of the combination unit. Background technique [0002] The electronic transformer converts the primary large current and voltage signals into secondary small analog quantities, and realizes on-site collection, and transmits the digital current and voltage signals into the combiner, which are packaged at the combiner and then sent to the protection, measurement and control, etc. device for data transmission. [0003] Electronic current transformers use the basic principles of Rogowski coils and light-load coils. Because the Rogowski coil adopts a non-magnetic skeleton, there is no magnetic saturation phenomenon. The primary current passes through the Rogowski coil to obtain a secondary voltage proportional to the...

Claims

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Application Information

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IPC IPC(8): G01R35/00
Inventor 吴建坤陈建民韩学军陆志浩
Owner EAST CHINA ELECTRIC POWER TEST & RES INST
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