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SF6 state on-line monitoring method and system for GIL

A state, S16 technology, applied in neural learning methods, measuring devices, character and pattern recognition, etc., can solve problems such as leakage, reduce costs, reduce development cycles and costs, and reduce grid safety accidents

Pending Publication Date: 2021-12-28
SHANDONG ELECTRICAL ENG & EQUIP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the present invention provides an SF6 online monitoring method and system for GIL, which can predict the SF6 gas density one day in advance, and then timely discover the problems of SF6 gas leakage and excessive micro-water content in the GIL gas chamber, thereby reducing the safety of the power grid. The occurrence of accidents improves the reliability and stability of power system operation

Method used

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  • SF6 state on-line monitoring method and system for GIL
  • SF6 state on-line monitoring method and system for GIL
  • SF6 state on-line monitoring method and system for GIL

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Experimental program
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Embodiment 1

[0077] This embodiment discloses an on-line monitoring system for SF6 state for GIL, such as figure 1 As shown, it includes SF6 status sensor, data relay device, intelligent monitoring device, optical fiber ring network switch and monitoring background. There are multiple SF6 state sensors. Different SF6 state sensors collect state information such as temperature, pressure, density and humidity of SF6 gas in their respective GIL gas chambers; data relay device relays, aggregates and forwards SF6 gas state data; intelligent monitoring The device converts the received SF6 gas state data into IEC61850 protocol, and has the functions of local sound and light alarm and fan linkage control; the monitoring background has the function of displaying the SF6 gas state information of each gas chamber, the function of displaying the alarm information, and the function of querying the historical data curve. and parameter configuration. attached figure 1 This is the network diagram of the...

Embodiment 2

[0086] This embodiment discloses an on-line monitoring system for SF6 state for GIL, such as figure 2 As shown, it includes SF6 status sensor, intelligent monitoring device, optical fiber ring network switch and monitoring background. Different SF6 state sensors collect state information such as temperature, pressure, density and humidity of SF6 gas in their respective GIL chambers; the intelligent monitoring device can convert the received SF6 gas state data into IEC61850 protocol, and has local sound and light alarm and fan Linkage control function; the monitoring background has functions such as the display function of SF6 gas status information in each gas chamber, the display function of alarm information, the function of querying historical data curves and parameter configuration. Different from Embodiment 1, the SF6 state sensor in this embodiment is directly connected to the intelligent monitoring device. The SF6 state sensor is connected with the intelligent monitor...

Embodiment 3

[0090] This embodiment discloses an on-line monitoring method of SF6 state for GIL. This method can be implemented in the monitoring background of Embodiment 1 or Embodiment 2. The Elman algorithm is used to predict the density of SF6 gas one day in advance by using database historical data and genetic particle swarm hybrid optimization. Early maintenance can prevent failures from occurring. Specifically include the following steps:

[0091] S01), using the PSO-GA algorithm to optimize the Elman neural network, the optimization process is:

[0092] S11), determine the Elman network structure, determine the Elman connection weight and threshold;

[0093] S12), initialize the genetic particle swarm population, take the Elman neural network training error as the fitness value, and calculate the population fitness value;

[0094] S13), update the speed and position of the particle, and determine the optimal solution of the population;

[0095] S14), carry out selection, crossov...

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Abstract

The invention discloses an SF6 state on-line monitoring method and system for a GIL. The monitoring system comprises SF6 state sensors, a data relay device, an intelligent monitoring device, an optical fiber ring network switch and a monitoring background, different SF6 state sensors collect the temperature, pressure, density and humidity of SF6 gas in respective GIL gas chambers; the SF6 state sensor is connected with the intelligent monitoring device through the data relay device or directly connected with the intelligent monitoring device, and the data relay device relays, gathers and forwards SF6 gas state data; the intelligent monitoring device converts the received SF6 gas state data into an IEC61850 protocol, and is connected with the local sound-light alarm device and the linkage fan; and the monitoring background is connected with the intelligent monitoring device. According to the monitoring method, the Elman neural network is optimized through genetic particle swarm mixing, the SF6 gas density is predicted one day before, then the problems of SF6 gas leakage and too large micro-water content of the GIL gas chamber are found in time, and the reliability and stability of operation of a power system are improved.

Description

technical field [0001] The invention relates to the field of SF6 on-line monitoring, in particular to a method and system for on-line monitoring of SF6 state for GIL. Background technique [0002] GIL is the English abbreviation of gas-insulated metal-enclosed transmission line. The main components of GIL include aluminum alloy casing, aluminum alloy conductor, insulating gas and epoxy support insulator, etc. The epoxy support insulator is used to support the conductor, so that the conductor is fixed in the center of the shell , Fill SF6 (sulfur hexafluoride) or other insulating gas between the conductor and the shell. GIL has the characteristics of strong current carrying capacity, far less loss than cables and overhead lines, flexible and convenient laying, reliable operation, and less maintenance and overhaul. It has matured and applied in many places at home and abroad. System investment and upgrading, GIL projects have a growing trend in China. [0003] SF6 gas has th...

Claims

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Application Information

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IPC IPC(8): G06K9/62G06N3/04G06N3/08G01N33/00
CPCG06N3/04G06N3/086G01N33/0063G06N3/048G06F18/241
Inventor 刘恒涛王坤傅春明李建王培仑李凤民刘旭平李军王新刚张猛刘宗振张栋亓云国
Owner SHANDONG ELECTRICAL ENG & EQUIP GRP