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Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit

A feeder automation and network feeder technology, applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc., can solve the problems of power grid impact, long recovery time of power supply, failure selectivity and poor protection of power supply recovery ability, etc. To achieve the effect of improving the security of the system

Inactive Publication Date: 2012-10-03
南京软核科技有限公司
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AI Technical Summary

Problems solved by technology

Both need to cooperate with the master station of distribution network automation to recover. The distribution network automation system has the problem of dispatching authority and complicated installation to control the switch at the head end of the substation; the communication dependence on the FTU of the feeder automation terminal is very strong. When the communication is interrupted, the feeder The work of the automation terminal FTU is affected, and there are problems with system security; fault selectivity and power supply restoration capabilities are not well guaranteed
The local type will cause multiple impacts on the power grid when the power supply is restored, and the restoration of power supply takes a long time

Method used

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  • Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit
  • Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit
  • Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit

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Embodiment Construction

[0021] control figure 1 , in the normal working state of the line, the feeder automation terminal completes the collection and transmission of real-time data of the line; the feeder automation device, through the underlying TCP / IP communication protocol, realizes the real-time communication between the feeder automation devices, ensuring that each feeder automation terminal FTU It can obtain the status information of several other feeder automation terminal FTUs, so as to realize the judgment of power supply direction, the calculation of front and rear nodes, and provide corresponding data support for protection strategies;

[0022] The feeder automation terminal includes the main control feeder automation terminal FTU1, the second feeder automation terminal FTU2, the third feeder automation terminal FTU3, the fourth feeder automation terminal FTU4 and the fifth feeder automation terminal FTU5; the main control feeder automation terminal FTU1 connection control The first circu...

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Abstract

The invention relates to a power distribution network feeder protection and reconfiguration scheme based on an intelligent feeder terminal unit (FTU). The power distribution network feeder protection and reconfiguration scheme based on the intelligent FTU comprises the following processing methods: 1, acquisition and transmission of line real-time data by the FTU under the normal work state of the line; 2, selection of the FTU; 3, concrete strategy when short circuit fault occurs at the transient fault point; and 4, strategy when short circuit fault occurs at the permanent fault point. The power distribution network feeder protection and reconfiguration scheme based on the intelligent FTU has the advantages of realizing functions of effectively transmitting the feeder real-time data, monitoring the distribution network structure, quickly isolating fault and reconfiguring and realizing the corresponding functions of the original system configured with a master station and a secondary station by configuring the relatively simple background management machine, so that the independence of the FTU, the rapidity of fault clearing and the safety of the system are improved. The operation mode of the intelligent FTU is set, so that the intelligent FTU is based on a high-speed communication platform and does not completely depend on communication.

Description

technical field [0001] The invention relates to a protection and reconfiguration scheme for a medium-voltage (6kV, 10kV, 20kV) distribution network feeder in a power system based on an intelligent feeder automation terminal, and belongs to the technical field of distribution network feeder protection and reconfiguration. Background technique [0002] Reliability of power supply is an important technical indicator for power companies to strive for excellence, and high reliability and high-quality power supply is the basic condition for power companies to do a good job in electricity sales services. As an important technical means to improve the reliability of power supply, grid automation has been paid more and more attention by the power sector. At present, while the country is investing a lot of money in the construction and transformation of urban power grids, the distribution network automation pilot project is also included in the urban network transformation plan. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00H02H7/28
CPCY04S10/20Y02E60/725Y02E60/00
Inventor 王朝明马春生
Owner 南京软核科技有限公司
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