JPS5960366A - Method and device for abnormality detection of electric equipment - Google Patents

Abstract

PURPOSE:To detect the abnormality of an electric equipment without malfunction due to fine dust and oil mist and the need for a radiation source by detecting carbon monoxide concentration and carbon dioxide concentration and detecting the abnormality to the basis of the concentration ratio. CONSTITUTION:Gaseous hydrogen sealed in a main gas turbine generator body is admitted from a high-pressure side pipe 2 through a pressure reduction valve 6, filters 7 and 8, and a dehumidifier 9, and the valve 6 is stopped and a valve 11 is opened to measure CO2 by a CO2 detector 5, whose output is inputted to a data processor 16. The valve 11 is closed and a valve 10 is provided to guide the sealed gas to a reaction pipe 14, thereby oxidizing CO into CO2. A valve 12 is closed and a valve 13 is opened to measure CO2 by the CO2 detector 15, whose data is inputted to the data processor 16 to obtain measurement results of the both in the form of the ratio of CO2/CO+CO2. Consequently, the thermal decomposition reaction of the material is most active within a range from a concentration ratio 0.5b to 0.66a and the thermal decomposition of the insulating material in the machine is detected.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention detects abnormal local overheating within a large hydrogen-cooled turbine generator by measuring gas sealed inside the machine.
This article relates to a method and device for detecting anomalies in 11-air appliances.

[Technical wrinkles of the invention and its problems]

Hydrogen gas is used as the injection gas for turbine generators from the viewpoint of buildings. Abnormal overheating accidents in large turbine generators pose serious social and economic problems.

A large number of loquats are used in hydrogen-cooled turbine generators, and organic insulating materials thermally decompose due to localized abnormal overheating, producing decomposition products. This decomposition product diffuses into other hydrogen gas. If these diffused decomposition products are used and managed with high sensitivity, it will be possible to detect failures and accidents in turbine generators at an early stage. Currently, the ion chamber method is the main method for detecting decomposition products in enclosed hydrogen gas.

This method detects fine particles in the decomposition products, and the pressure of the charged hydrogen gas varies depending on the change in rotor rotational speed. In addition to emitting an f-signal due to the slight difference in shear due to fluctuations in the
Since radiation is emitted from the leg lines, care must be taken when handling it.

[Purpose of the invention]

The present invention (:↓It does not malfunction due to minute dust or oil mist in electrical equipment, and does not require radiological personnel.
The purpose is to provide a method and equipment for detecting all abnormalities in equipment.

[Summary of the invention]

The present invention produces 'r! I have everything.

[Embodiments of the invention]

The present invention will be explained below with reference to the drawings, but first the principle of the present invention will be explained.

When organic insulating materials thermally decompose, fine particles and gas are generated.

The cracked gas is lower hydrocarbons such as carbon monoxide, carbon dioxide, hocamethane, ethylene, and ethane, of which -11 carbon and 2f dredged carbon account for the majority, and in the heat fraction Hakube HIJl, even more That tendency is strong. i Busy carbon monoxide, :i; 4, 2, □, Lf If both carbons are produced with high sensitivity * (', [', it can be seen that the one-color border material is undergoing thermal decomposition. In addition, in the first river section of both j1, carbon dioxide is mostly present in the low TMA region, and as the temperature rises, the proportion of carbon dioxide begins to decrease, and -1 change charcoal wood increases, and the ratio is reversed until -(
・(-.The temperature at which the biological ratio is reversed varies depending on the family, but it is generally in the temperature range of 250°C to 400°C. That is, (
′(The thermal decomposition of the family becomes old lj, γ, passion h31 and 4
I can do it. So by the material its'? '! I to J
Even if the temperatures are different by 9°C, if you measure the ratio ff between the two, you will be able to know the heat content of 4J'i+, regardless of the temperature. The present invention has been made with this in mind, and this will be explained below.

In Fig. 1 Q, l is the gas turbine Motoichi, Iso body (hereinafter referred to as the wave body), and this machine 11N l hydrogen gas flows from the high pressure 1tiil pipe 2 to the exhaust device monitor 4.5 through all the low pressure Side care? It is circulated from y3 to the main body.

The detection monitor 4 is the same as the previous device and detects gases other than hydrogen gas. 4rI! The output monitor 5 is as shown in the second part 1. ! The pressure is reduced from the 11 arrangement 2 with a pressure reducing valve 6, the dust is removed with a filter 7, and the particulates in the decomposition products are removed with a filter 8.

Next, a dehumidifier 9 removes all moisture. Next, stop the valve 10, open the pulp 11 gold, and remove the carbon dioxide (CO2) in the sealed gas.
) is determined by CO2 detector J5 to 1llllJ, and this measurement result is recorded on a recorder or input to data processing t, Q16. Afterwards, the valve JJ'fC is closed, and the valve 10 is opened to guide the sealed gas into the 1-core tube.In the reaction tube, an oxidizing agent such as Togane 1-4 oxide or iodine oxide is irradiated with light. , carbon monoxide (CO) in the enclosed gas oxidizes to CO2. An example of the reaction is shown in Equation (1).

5CO205 −−→ 5CO2+I2 ==−
-”””” (1) Convert co5 to CO2, close Pulp 12 in the ridge, open Parzuno 3, and make C02
CO2 is measured by the detector 15 and inputted to the data processing unit 16 to perform a certain calculation. In this measurement, the combination of CO' and CO2 is measured as CO2 by H1.

The measurement results for both f, (showing the relationship in the ratio of CO2/CO + CO2, the relationship shown in Figure 3 is obtained.1 In Figure 3, it can be seen that as the thermal deterioration of the feed progresses, the proportion of CO increases, and the concentration ratio The range from 0.5 (b) to o, 66 (a) is the point where the thermal decomposition reaction of the material is most active.1 The yellow axis shifts depending on the 47 family, but (a speed ratio Judging from the material ('@\ai, on board,
In this case, it is also possible to separate COl and CO2f at the same time. If you calculate the related money, you will get frame 4 (2). In this case, the reaction surface 14 will be negative.・;F
, 4 l'A, the points corresponding to a and b in FIG. 3 correspond to a.' and b'.

However, simultaneous analysis of CO and co2y, 1 makes it difficult to produce CO, which is generated in small quantities in the early stage of thermal decomposition, so it is difficult to produce CO, which is generated in small quantities at the initial stage of thermal decomposition.
By measuring as 2, it is possible to more accurately detect the process of thermal decomposition of the material.

Instruments for producing CO□ and CO include infrared p4 gas analysis 81゛, gas chromatograph, ) JFa analyzer, etc.

In addition, in the above-mentioned embodiment, since the conventional detector monitor 4 and the stage monitor 5 of the present invention are installed in parallel with the conventional system, the gas anvil starts from the moment the alarm of the detector monitor 4 sounds. 7. Measure and confirm from the above-mentioned relationship whether the alarm was activated by the heat content of the inner insulation material (11PL) or not. do. In addition, blowing out is also possible for gas analysis inside a gas-filled stationary device. In addition to this, it goes without saying that the present invention may be implemented using only the above-mentioned square output monitor 5.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the abnormality detection device for electrical equipment according to the present invention, FIG. 2 is a diagram showing a specific example of the detector monitor shown in FIG. 1, and FIG. This is a diagram showing the relationship between CO and CO2 (measured by a detection monitor) for the sake of complete satisfaction. 1... Launch 'f13', machine body, 2... 1% IE side blue arrangement, 3... Low pressure 11 piping, 4... Conventional style performance monitor, 5... Production of the present invention Monitor, 6...Reducing valve, 7...Filter, 8...Filter, 9.
・・Dehumidifier, 10・Papalub, 11・・Valve, 12
...Valve, 13...Valve, 14...Reaction tube,
15... Production device, 16... Recorder or data processor.
ε76 Application fee t! ((Person Patent Attorney Takehiko Suzue Figure 1 Figure 3 Cause □ 4th degree □ Figure 4 Hibiki □ Shiraku -→

Claims (2)

[Claims] (1) The concentration of carbon monoxide and carbon dioxide, which account for most of the gases generated from organic insulating materials in electrical equipment due to initial abnormal local overheating, is detected, and the concentration of both is detected. An abnormality detection method for electrical equipment that detects abnormalities in insulating materials within electrical equipment based on the ratio. (2) In electrical equipment that has an organic insulating material inside,
When detecting the carbon monoxide concentration and carbon dioxide concentration inside the electric device, the electric device has a detector from the detector and a data processor that inputs the carbon monoxide concentration and carbon dioxide concentration and calculates a concentration ratio. Anomaly detection device.