Bus protection system and method based on voltage phase locking networked sampling

A busbar protection and phase-locking technology, applied in information technology support systems, emergency protection circuit devices, electrical components, etc., can solve the problems of small detection range and unsuitable for multi-regional promotion, and achieve low cost, which is conducive to fault analysis and quantity Set flexible effects

Inactive Publication Date: 2014-08-13
GUANGXI POWER GRID CORP
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Problems solved by technology

However, this application is still protecting the digital quantity and switching quantity transmitted between the main station and the protection substation or the digital quantity output by the electronic transformer, the detection range is small, and it is not suitable for promotion in multiple regions. Synchronization problem of busbar protection

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  • Bus protection system and method based on voltage phase locking networked sampling
  • Bus protection system and method based on voltage phase locking networked sampling
  • Bus protection system and method based on voltage phase locking networked sampling

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Embodiment Construction

[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] refer to figure 1 , a busbar protection system based on voltage phase-locked networked sampling, characterized in that it includes a PT merging unit, several bay merging units (bay merging unit 1, bay merging unit 2... bay merging unit n), a switch and a bus protection device, The PT merging unit is connected to the interval merging unit, the PT merging unit and the interval merging unit are connected to the switch, and the switch is connected to the bus protection device; the PT merging unit can distribute voltage for the interval merging unit, and can also sample value message.

[0041] ...

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Abstract

The invention discloses a bus protection system and method based on voltage phase locking networked sampling. The system comprises a PT merging unit, a plurality of spaced merging units, an interchanger and a bus protection device, the bus protection device comprises a FPGA, a message processor and a protection processor, and the method comprises the following steps of recording the arrival time of each frame of a sampling value message in real time, analyzing the sampling value messages, tracking the sending frequency of sampling values of the merging units, measuring network transmission extra delay errors, synchronizing the interpolation of the sampling values and performing relay protection on a bus. The bus is protected based on voltage phase locking networked sampling, the sampling values are output by the interchanger, the sampling value messages are output in a unified mode, failure analysis of a power system is facilitated, the number of the spaced merging units is set according to the requirement of a protected bus, the number is set flexibly, the engineering implementation is flexible, the synchronization logic and bus protection logic are relatively independent, and the system and method are suitable for being popularized and used in multiple areas.

Description

technical field [0001] The invention belongs to the field of relay protection of intelligent substations and digital substations in electric power systems, and relates to busbar protection for networked transmission of sampling values ​​of intelligent substations and digital substations. Background technique [0002] Busbar protection is one of the main protections in power systems. The safe and reliable operation of the bus directly affects the reliability of power supply in power plants and substations. With the extensive application of digitalization, the traditional busbar protection connected with current and voltage analog quantities can no longer meet the technical requirements of relay protection in smart substations. In order to solve the urgent needs of engineering applications, some busbar protections suitable for digital transmission of sampled values ​​have been developed at home and abroad. According to the synchronization method of sampled values, they can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22H02J13/00
CPCY04S10/20Y02E60/725Y02E60/7838Y04S40/124Y02E60/00
Inventor 韩冰汤汉松郑发林周东顶刘斌黄东山武建卫
Owner GUANGXI POWER GRID CORP
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