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Network type protection method for hybrid networking based on closed-loop model operation

A hybrid networking, closed-loop technology, applied in emergency protection circuit devices, electrical components, information technology support systems, etc., can solve the problems of long processing time and slow response time, saving time, small line impact, and fast speed Effect

Active Publication Date: 2014-06-18
BEIJING CREATIVE DISTRIBUTION AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each feeding terminal needs to send information to all feeding terminals, and each feeding terminal needs to establish an information table of all feeding terminals, which takes a long time to process and slow response time

Method used

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  • Network type protection method for hybrid networking based on closed-loop model operation
  • Network type protection method for hybrid networking based on closed-loop model operation
  • Network type protection method for hybrid networking based on closed-loop model operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Embodiment 1, when the communication is normal, a fault occurs between the terminal unit adjacent to the substation and the substation, that is, in figure 1 In the fault point F1, the protection action is as follows:

[0126] A. After the outlet circuit breaker CB1 in the substation ES1 detects the fault current, it starts the quick-break protection function or the over-current protection function;

[0127] B. The intelligent controller in the terminal unit adjacent to the substation ES1 activates the quick-break protection function or the over-current protection function, and the circuit breaker S1 trips.

[0128] At the fault point between circuit breakers in the present invention, the protection action is the same as the invention patent of the network protection method based on the network closed-loop mode operation applied by the applicant, and the present invention will not repeat them.

Embodiment 2

[0129]Embodiment 2, when the communication is normal, the fault point is located between the two terminal units, one of the terminal units controls a circuit breaker; the other terminal unit controls a load switch, that is, in figure 1 For the fault point F2 in , the protection action is as follows:

[0130] A. After the terminal unit of the control circuit breaker at the fault point detects the fault current, it starts the quick-break protection function or the overcurrent protection function, and the circuit breaker S1 trips;

[0131] B. After the terminal unit of the control circuit breaker located on the other side of the fault point and closest to the terminal unit of the control load switch detects the fault current, it starts the quick-break protection function or the overcurrent protection function, and the circuit breaker S4 trips;

[0132] C. The terminal unit controlling the load switch located on the other side of the fault point starts the fault current pulse dete...

Embodiment 3

[0135] Embodiment 3, when the communication is normal, the fault point is located between the two terminal units controlling the load switch, that is, at figure 1 In the fault point F3, the protection action is as follows:

[0136] A. After the terminal unit of the control circuit breaker S1 on one side of the fault point detects the fault current, it starts the quick-break protection function or the overcurrent protection function, and the circuit breaker S1 trips;

[0137] B. After the terminal unit of the control circuit breaker S4 on the other side of the fault point detects the fault current, it starts the quick-break protection function or the overcurrent protection function, and the circuit breaker S4 trips;

[0138] C. The terminal unit controlling the load switch T2 at the fault point starts the fault current pulse detection function and the load switch fault isolation function, and the load switch T2 is opened;

[0139] D. The terminal unit that controls the load sw...

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PUM

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Abstract

A network type protection method for hybrid networking based closed-loop model operation is used in a circuit breaker and load switch hybrid networking system operated in a closed-loop mode. The networking system comprises multiple substations and terminal units connected with the substations. The networking system is characterized in that each terminal unit comprises an intelligent controller and a communication module, each intelligent controller controls the corresponding circuit breaker and the corresponding load switch, each terminal unit only communicates with the adjacent terminal unit, the intelligent controller in each terminal unit collects fault current, fault current direction, fault current relation direction, state and after-fault information of the circuit breakers and the load switches of the terminal unit and the adjacent terminal unit. The peer-to-peer communication network is adopted by the method, the terminal units on a circuit are communicated with one another, the fault information of adjacent switches are collected, arbitration is performed, and fast fault positioning and isolation are realized.

Description

technical field [0001] The invention relates to a protection method for an intelligent power network, in particular to a network protection method suitable for the operation of a multi-power supply ring network structure and a mixed network of circuit breakers and load switches. Background technique [0002] Distribution automation is an important part of the smart grid, which is of great significance for improving the reliability of power supply, expanding the power supply capacity and realizing the efficient and economical operation of the power grid. Power grid fault handling is the core content of distribution automation. However, according to the types of section switches and tie switches selected, the automation schemes adopted are also different. Closed-loop operation has high requirements for traditional relay protection settings, complicated setting, and high quality requirements for operating personnel. [0003] In actual operation, a load switch is generally used...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02J13/00
CPCY02E60/00Y04S10/16Y04S10/20
Inventor 袁钦成袁启洪李春光王娟娟董良董旭柱黄小耘于力彭飞进黄红远
Owner BEIJING CREATIVE DISTRIBUTION AUTOMATION
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