CN201277937Y

CN201277937Y - SF6 gas small water density synthetic on-line monitoring system

Info

Publication number: CN201277937Y
Application number: CNU2008201746391U
Authority: CN
Inventors: 郝朝阳; 张鸿博
Original assignee: SHANDONG TAIKAI ELECTRIC AUTOMATION CO Ltd
Current assignee: SHANDONG TAIKAI ELECTRIC AUTOMATION CO Ltd
Priority date: 2008-10-28
Filing date: 2008-10-28
Publication date: 2009-07-22
Anticipated expiration: 2018-10-28

Abstract

The utility model discloses an on-line synthesized micro-water and density monitoring system for SF 6 gas. The system comprises a sampler, a micro-water sensor, a density sensor and a monitoring plant, wherein the sampler comprises a sampler conduction and cutting-off switch, a sampler interface valve, a sampler air chamber, a charge self-sealing interface valve, a density meter interface valve and a micro-water sensor interface; the monitoring plant comprises a CPU module as well as an analog quantity acquisition module, a warning module and a display module which are respectively connected with the CPU module. The system can accurately collect relative data, monitors the micro-water and the density of the SF6 gas inside a GIS gas chamber, and has the characteristics of high monitoring precision, reliable measurement, stability, and the like.

Description

The comprehensive on-line monitoring system of the little water-mass density of SF6 gas

Technical field

The utility model relates to the on-line monitoring system of SF6 gas, especially relates to the system that parameters such as a kind of humidity of SF6 gas and density are monitored.

Background technology

Moisture in the GIS equipment is produced by underlying cause: GIS equipment all may contact wetting in manufacturing, transportation, installation, maintenance process, moisture is immersed in each element of equipment to go; The insulating part of GIS equipment has the moisture of 0.1%--0.5%ppmv, release that can be very long in operational process; Itself just contains moisture adsorbent in the GIS equipment; SF6 gas contains moisture in the air chamber; Though GIS equipment has reliable sealing system, the hydrone diameter is less than SF6 gas, and water still can dig into.

Gas in the GIS equipment contains moisture, can cause serious adverse consequences, harmfulness has following two aspects: 1, moisture can cause the equipment chemical corrosion, during than juicy, SF6 gas generates hydrofluorite and sulphurous acid in hydrolysis more than 200 ℃, has stronger corrosive attack; 2, moisture can work the mischief to the electric equipment insulating part, and moisture can produce condensate water on the surface of insulating part and metal parts in electric equipment, cause edge flashing.

Moisture surpasses certain content in the sulfur hexafluoride can influence equipment safety operation, therefore wants period sampling measuring, if when finding the examination criteria of overshoot, should adopt gas concentration unit to carry out dried, until qualified.

Summary of the invention

For the indexs such as the real-time humidity of SF6 gas, real-time pressure, relative humidity, density and humidity in the GIS equipment are carried out on-line monitoring, the utility model provides the little water-mass density of a kind of SF6 gas comprehensive on-line monitoring system, this system is particularly useful for SF6 gas insulated metal enclosed swit chgear GIS equipment, to satisfy the needs of electric power automation of distributive net and equipment state overhauling.

For realizing above purpose, technical solution adopted in the utility model is: this system comprises sampling thief, little water sensor, density sensor and monitoring device, sampling thief comprises sampling thief conducting cutoff switch, sampling thief interface valve, the sampling thief air cavity, inflate self-styled interface valve, density meter interface valve and little water sensor interface, wherein the centre position of sampling thief air cavity is fixed and is communicated with little water sensor interface, fixing respectively density meter interface valve and the self-styled interface valve of inflation of being communicated with of one end of sampling thief air cavity, its other end is fixedly connected sampling thief conducting cutoff switch and sampling thief interface valve respectively, the fixing density sensor that is communicated with of density meter interface valve, the little water sensor of the fixing connection of little water sensor interface, when sampling thief conducting cutoff switch rotates, can make sampling thief interface valve and the conducting of sampling thief air cavity or end; Monitoring device comprises CPU module and the analogue collection module, alarm module and the display module that are connected with the CPU module respectively, analogue collection module receives little water signal that transmits from little water sensor and the density signal that transmits from density sensor, the CPU module is handled to little water signal with from density signal, and control warning module is reported to the police and display module shows.

Density sensor connects analogue collection module by the density meter signal wire, and little water sensor connects analogue collection module by little water signal wire simultaneously.

This system adopts the high volume sampler with conducting cutoff switch that gas in the SF6 air chamber is sampled, little water and density sensor can pass to sampled result on the monitoring device, monitoring device adopts corresponding algorithm that sampled result is handled, and at last result is shown.If current moisture and density exceed standard, device can the alarm user carry out respective handling, and the user can carry out alarm settings to little water and density value according to different needs.

This system adopts little water sensor of high-performance and density density to have the measuring accuracy height, and measurement range is wide, characteristics such as system stability; Each joint of sampling thief adopts brass to make, and the sampling thief air cavity adopts stainless steel material, has big, withstand voltage strong, the good airproof performance of appearance looks elegant, reasonable in design, air chamber capacity, advantage such as multiple functional; Adopt corresponding algorithm to dew point and PPM, pressure and density are carried out corresponding conversion, have the accuracy height, measure characteristics such as reliable; But adopt the humidity and compactibility of the various electric pressure SF6 circuit breaker gas of monitoring device on-line monitoring, data digitizing at the scene show, but networking, can with Surveillance center's communication, can set alert data, easy for installation, cost is lower.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As shown in the figure, sampling thief 3 carries out the collection of SF6 gaseous tension for density sensor 8 (or teletransmission density meter) and little water sensor 4 carries out the container that humidity is gathered, the employing stainless steel material is made, inside is cylindrical sampling thief air cavity 10, and interior table is extremely smooth, and container can bear 1MPa pressure, container capacity is big, can store a large amount of gases, and then make sampling precision higher, error is littler.

Fixing little water sensor interface 6, the little water sensor 4 of little water sensor interface 6 fixing connections of being communicated with in sampling thief air cavity 10 centre positions.Because of the little water sensor probe of SF6 gas needs farthest to contact with SF6 gas, little water sensor interface 6 is designed to built-in mode (recessed formula interface), interface thread is 1/2 cun international standard interface made in Great Britain, and built-in ethylene-propylene diene copolymer " O " type circle has excellent sealing performance.Employed little water sensor 4 has good long term stability, broad measurement range, anti-condensation, anti-dust granule is not subjected to the influence of oil gas, most of chemical gas and flow.

Fixing respectively density meter interface valve 7 and the self-styled interface valve 6 of inflation of being communicated with of one end of sampling thief air cavity 10, the density meter interface valve 6 fixing density sensors 8 that are communicated with, this valve has automatic closing function, be the self-styled valve of special use, pilot hole and holding screw are arranged simultaneously, and it is more firm that density sensor 8 is installed.Inflate self-styled interface valve 6 and be the expansion gas-charging connection of isolating switch (or gas insulated metal enclosed swit chgear GIS) air chamber,, have automatic closing function, be the self-styled valve of special use, and design there is special-purpose dustproof copper cap for these air chambers fill SF6 gas and vacuumize function.

Sampling thief air cavity 10 other ends are fixedly connected sampling thief conducting cutoff switch 1 and sampling thief interface valve 2 respectively.Sampling thief interface valve 2 is interface units of sampling thief 3 and GIS or isolating switch, and SF6 gas is from enter sampling thief air cavity 10 here.Sampling thief conducting cutoff switch 1 is the actuating switch of sampling thief 3 and GIS or isolating switch air chamber, it is used for conducting and blocking-up SF6 gas, make sampling thief 3 independent with GIS or isolating switch air chamber, be convenient to the replacing and the maintenance of sensor, copper cap on it not only can prevent dust but also can be used as the operation tool of this actuating switch, blocked the valve shaft rotation after it is flipped upside down and just can carry out switching manipulation.

Monitoring device 10 comprises analogue collection module 14, CPU module 13, alarm module 15 and display module 16, density sensor 8 passes to analogue collection module 14 to density signal by density meter signal wire 9, little water sensor 4 is delivered to analogue collection module 14 to little water signal by little water signal wire 5 simultaneously, CPU module 13 adopts corresponding algorithm that analogue collection module 14 is gathered next density signal and little water signal carries out data processing calculating, and by display module 16 demonstrations, CPU module 13 can be accepted user's setting operation and preserve simultaneously, also can carry out combined network communication, every monitoring device main frame can be simultaneously carries out the on-line monitoring of little water-mass density to 4 GIS or isolating switch air chamber, when monitoring device 10 detected little water and density signal surpass the warning numerical value of setting, can start alarm module 15 and report to the police, thereby reach the purpose of on-line monitoring.

Sampling thief can be fixed on isolating switch or the GIS body, and the monitoring device main frame can be fixed on the installation sites such as switch board.

Claims

1, the comprehensive on-line monitoring system of the little water-mass density of a kind of SF6 gas, comprise sampling thief (3), little water sensor (4), density sensor (8) and monitoring device (12), it is characterized in that: sampling thief (3) comprises sampling thief conducting cutoff switch (1), sampling thief interface valve (2), sampling thief air cavity (10), inflate self-styled interface valve (6), density meter interface valve (7) and little water sensor interface (11), wherein the centre position of sampling thief air cavity (10) is fixed and is communicated with little water sensor interface (6), fixing respectively density meter interface valve (7) and the inflation self-styled interface valve (6) of being communicated with of one end of sampling thief air cavity (10), its other end is fixedly connected sampling thief conducting cutoff switch (1) and sampling thief interface valve (2) respectively, the fixing density sensor (8) that is communicated with of density meter interface valve (7), the fixing little water sensor (4) that is communicated with of little water sensor interface (6), when sampling thief conducting cutoff switch (1) rotates, can make sampling thief interface valve (2) and (10) conducting of sampling thief air cavity or end; Monitoring device (12) comprises CPU module (13) and the analogue collection module (14) that is connected with CPU module (13) respectively, alarm module (15) and display module (16), analogue collection module (13) receives little water signal that transmits from little water sensor (4) and the density signal that transmits from density sensor (8), CPU module (13) is handled to little water signal with from density signal, and control warning module (15) is reported to the police and display module (16) shows.

2, the comprehensive on-line monitoring system of the little water-mass density of SF6 gas according to claim 2, it is characterized in that: density sensor (8) connects analogue collection module (14) by density meter signal wire (9), and little water sensor (4) connects analogue collection module (14) by little water signal wire (5) simultaneously.