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Intelligent body protection device and protection method thereof

A body protection and intelligent technology, applied in the electrical field, can solve the problems of inability to quickly isolate faulty equipment, reduce the speed of transformer body protection action, etc., to achieve the effect of improving accuracy and rapidity, improving flexibility and improving rapidity

Active Publication Date: 2012-04-18
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this method will reduce the action speed of the transformer body protection and cannot quickly isolate the faulty equipment

Method used

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  • Intelligent body protection device and protection method thereof
  • Intelligent body protection device and protection method thereof
  • Intelligent body protection device and protection method thereof

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Such as figure 1 As shown, the solid line part is the working principle diagram of the original body protection device. On the basis of retaining the circuit and function of the original body protection, the present invention adds the information judgment part of DGA. The added DGA discriminative part is indicated by dashed lines.

[0031] The added part includes that the external DGA device inputs DGA information and the DGA control word determined by the user to the CPU. This information includes the early warning information sent by DGA and the information of the seven component gases in the transformer oil, which are sent in the form of GOOSE / MMS , output tripping signal TZ1 and signal XH1 after being judged by CPU.

[0032] The control word allows the user to choose whether to use the DGA information to participate in the trip control, and...

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Abstract

The invention relates to an intelligent body protection device and a protection method thereof. Due to the adoption of the intelligent body protection device and the method thereof, the reliability and the rapidness of the tripping operation are improved. The intelligent body protection device comprises a CPU (central processing unit) and a relay. One path of non-electricity protection signal outputs a tripping signal TZ by utilizing the relay; the other path of non-electricity protection signal is sent to the CPU and the CPU sends a signal record XH; the CPU is also additionally provided with two paths of inputs; one path of input is a DGA (Dissolved Gas Analysis) control word determined by a user; the other path of input is DGA information; the DGA information comprises early warning information sent out by a DGA unit and information of various component gases dissolved in transformer oil; the DGA information is sent out by a GOOSE (Generic Object Oriented Substation Event) / MMS (Multimedia Messaging Service) form; after the DGA information is judged by the CPU, a tripping signal TZ1 and a signal record XH1 are output; and the tripping signals TZ and TZ1 are connected in parallel to a tripping circuit and are both used for realizing tripping of a transformer. In the scheme, DGA (Dissolved Gas Analysis) on-line monitoring information is introduced to improve the reliability and the rapidness of protection of a transformer body and the intelligent body protection device and the protection method thereof are convenient to analyze the condition of the body protection operation later.

Description

technical field [0001] The invention belongs to the field of electricity, and in particular relates to an intelligent body protection device suitable for a digital station and a method thereof. Background technique [0002] At present, transformers are equipped with special non-electrical protection devices, which mainly monitor transformer oil temperature, gas, oil level and other information. When the corresponding digital signal is input, the body protection will trip directly through the cable, which has strong real-time performance. DGA is a dissolved gas analysis device in oil, which is used to reflect various faults such as heat generation and discharge inside the transformer, and has a high maturity. In the operation of the power grid, 220kV and above and important 110kV transformers generally or will use DGA devices, which reflect the abnormal conditions such as overheating, discharge, and moisture inside the transformer through the various component information an...

Claims

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Application Information

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IPC IPC(8): H02J13/00G01N33/00
CPCY02E60/723Y04S10/16Y02E60/00
Inventor 郭志红逯怀东路光辉尹东陈玉峰易永辉宋小会梁经宛
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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