阅读说明：本技术 一种光感应轻瓦斯继电器 (Light-sensitive light gas relay ) 是由 陈武 陈科宇 熊俊峰 张成强 于 2020-07-03 设计创作，主要内容包括：本发明公开了一种光感应轻瓦斯继电器,包括设置于轻瓦斯继电器本体内的空腔,所述空腔内设置有变压器油,还包括浮筒、感光机构和发光机构；所述感光机构和发光机构均设置于所述空腔内壁,且所述发光机构和所述感光机构对向设置；所述浮筒漂浮于所述变压器油,且所述浮筒位于所述发光机构和所述感光机构之间。本发明一种光感应轻瓦斯继电器,即可以有效的分析故障发展情况,也可以保证人员的人身安全,减轻人工工作量,提高工作效率,并且判断过程通过分析气体增长速率方式判断,判断准确性高。(The invention discloses a light-induced gas relay, which comprises a cavity arranged in a light gas relay body, a buoy, a light-sensitive mechanism and a light-emitting mechanism, wherein transformer oil is arranged in the cavity; the light sensing mechanism and the light emitting mechanism are both arranged on the inner wall of the cavity, and the light emitting mechanism and the light sensing mechanism are arranged oppositely; the buoy floats in the transformer oil, and the buoy is located between the light-emitting mechanism and the light-sensing mechanism. The photoinduction light gas relay can effectively analyze the fault development condition, can ensure the personal safety of personnel, lightens the manual workload, improves the working efficiency, and has high judgment accuracy by analyzing the gas growth rate in the judgment process.)

1. A light-induced gas relay comprises a cavity (2) arranged in a light gas relay body (1), wherein transformer oil (6) is arranged in the cavity (2), and the light-induced gas relay is characterized by further comprising a float bowl (3), a light-sensitive mechanism (4) and a light-emitting mechanism (5); the light sensing mechanism (4) and the light emitting mechanism (5) are both arranged on the inner wall of the cavity (2), and the light emitting mechanism (5) and the light sensing mechanism (4) are arranged oppositely; the buoy (3) floats on the transformer oil (6), and the buoy (3) is located between the light-emitting mechanism (5) and the photosensitive mechanism (4).

2. The photo-sensing light gas relay of claim 1, further comprising a processing module;

when the buoy (3) floats along with the change of the liquid level of the transformer oil (6), the light rays irradiated on the photosensitive mechanism (4) by the luminous mechanism (5) are changed;

when the light sensing mechanism (4) detects light change, light change data are sent to the processing module;

and the processing module judges increment and acceleration of fault gas in the light gas relay according to the light ray change data.

3. A light-induced light gas relay as claimed in claim 2, characterized in that the light-emitting means (5) comprise a light source element (51); the light emitting end of the light source element (51) faces the photosensitive mechanism (4).

4. A light-induced light gas relay as claimed in claim 3, characterized in that the light source element (51) is a light emitting diode.

5. A light-sensing light gas relay according to claim 2, characterized in that the photosensitive means (4) comprises a plurality of prisms (41) and a plurality of photosensitive elements (42) matched to the prisms (41);

the plurality of photosensitive elements (42) are arranged from top to bottom in sequence, and the plurality of prisms (41) are arranged from top to bottom in sequence;

when the prism (41) receives the light, the light is transmitted to the photosensitive element (42) corresponding to the prism (41).

6. A light-sensitive light gas relay according to claim 5, characterized in that the light sensing mechanism (4) acquires light variation data according to the time difference of the light detected by the plurality of light-sensitive elements (42).

7. A light-sensitive light gas relay as claimed in claim 5, characterized in that the light-sensitive element (42) is a photodiode.

Technical Field

The invention relates to the technical field of transformer accessories, in particular to a light-induced gas relay.

Background

The gas relay is installed in the pipeline between the oil tank and the oil tank of the transformer, and when the oil is decomposed to generate gas or oil flow surges due to the internal fault of the transformer, the contact of the gas relay is operated to connect the appointed control loop and send out a signal alarm (light gas) or start a protection element to automatically cut off the transformer (heavy gas). When the transformer breaks down in operation, gas can be gathered on the gas relay, if not in time with gas discharge, can influence the safe operation of transformer, lead to heavy gas action even and take place serious accident. If fault gas is generated, gas is timely discharged from the gas relay, and gas samples and oil samples are subjected to chromatographic test analysis and the like so as to judge the fault type and the development trend in time.

Light gas alarm processing flow: the operating regulations of power transformers (DL/T572-2010) stipulate that a transformer gas relay needs to be provided with two contacts, namely light gas and heavy gas, and in a normal operating state, the light gas is put into an alarm state, and the heavy gas is put into a trip state.

When the gas protection signal acts, the transformer should be immediately checked to check whether the gas protection signal is caused by air accumulation, oil level reduction, secondary circuit failure or transformer internal failure. If gas exists in the gas relay, the gas quantity is recorded, the color of the gas is observed, whether the test is combustible or not is observed, and gas and oil samples are taken for chromatographic analysis. If the gas in the gas relay is colorless, odorless and incombustible, and the chromatographic analysis judges that the gas is air, the transformer can continue to operate and the gas inlet defect can be eliminated in time. If the gas is combustible or the analysis result of the gas dissolved in the oil is abnormal, comprehensive judgment is carried out to determine whether the transformer is shut down.

However, in the prior art, it is stipulated that a power failure check should be immediately applied when a light gas alarm occurs twice a day continuously in a transformer. However, the gas taking work of the gas relay needs to be carried out manually, when gas occurs or a fault occurs in the main transformer, people and special vehicles need to be sent to the site in time to detect, so that the fault type is judged, and when the fault type is judged under the conditions of severe weather such as thunderstorm, strong wind, remote roads, remote transformer substations, power plants and the like, the gas detection work cannot be carried out in time, the fault expansion condition of the transformer cannot be judged in time, and fault repair is delayed.

Disclosure of Invention

The invention aims to solve the technical problems that in the prior art, the fault expansion speed of a transformer depends on manual gas detection of a gas relay, the fault expansion condition of the transformer cannot be judged in time easily, and fault repair is delayed.

The invention is realized by the following technical scheme:

the light-induced light gas relay comprises a cavity arranged in a light gas relay body, wherein transformer oil is arranged in the cavity, and the light-induced light gas relay also comprises a buoy, a light-sensitive mechanism and a light-emitting mechanism; the light sensing mechanism and the light emitting mechanism are both arranged on the inner wall of the cavity, and the light emitting mechanism and the light sensing mechanism are arranged oppositely; the buoy floats in the transformer oil, and the buoy is located between the light-emitting mechanism and the light-sensing mechanism.

The light gas signal of the transformer in the existing gas relay is sent out when the cumulant reaches the setting value, so that the functions of alarming and automatic cutting can be realized only, the expansion speed of the fault cannot be detected, and the fault expansion condition is detected on site by depending on manpower. When the invention is applied, when transformer oil in the transformer generates gas, the gas enters the cavity; the increase in gas in the cavity causes the transformer oil level to drop. The float bowl is arranged between the light-emitting mechanism and the photosensitive mechanism, so when the light-emitting mechanism emits light, light which should directly reach the photosensitive mechanism can be partially or completely shielded by the float bowl, and in the process that the liquid level of the transformer oil descends, the light shielded by the float bowl can reach the photosensitive mechanism along with the descending of the float bowl; the faster the buoy descends, the more the increment of the gas is, the faster the fault expansion speed of the transformer is, the faster the speed of receiving the newly increased light on the photosensitive mechanism is, and the expansion speed of the fault of the transformer can be displayed through the speed of the newly increased light.

The detection of the newly increased light ray speed can be realized by dispersing the light sensing mechanism, namely, the time for acquiring the light rays by the adjacent discrete units in the dispersed light sensing mechanism is differentiated from the distance between the adjacent discrete units, so that the speed of the liquid level reduction can be obtained, and the speed can form a mapping relation with the fault expansion speed of the transformer, so that even if the fault of the transformer does not reach the setting value condition of sending a light gas signal, an alarm can be sent out by the fault expansion speed of the transformer to give an early warning, the fault development condition can be effectively analyzed, the personal safety of personnel can be ensured, the manual workload is reduced, the working efficiency is improved, the judgment process is judged by analyzing the gas growth rate, and the judgment accuracy is high.

Meanwhile, gas generated in the transformer enters a gas relay, the buoy descends along with the increase of the gas, and the relay is attracted when the buoy descends to reach a setting position, so that a light gas signal is sent. Therefore, the severity of the transformer fault can be judged by monitoring the descending speed of the buoy, the higher the fault degree is, the faster the gas is produced, the faster the buoy is relatively descended, and when the descending speed of the buoy reaches a threshold value, the relay can be triggered to suck to send out a light gas signal, so that the fault can be removed in advance before large-scale expansion, and the safety and the stability of the system are further improved. In the invention, the connection between the photosensitive mechanism and the luminous mechanism is a pure optical relation, and the optical relation is not influenced by the electromagnetic field of the transformer, so the stability is extremely high, and the safety of a power system is facilitated.

Further, the device also comprises a processing module;

when the floating cylinder floats along with the change of the liquid level of the transformer oil, the light rays irradiated on the photosensitive mechanism by the light-emitting mechanism are changed;

when the light sensing mechanism detects light change, light change data are sent to the processing module;

and the processing module judges increment and acceleration of fault gas in the light gas relay according to the light ray change data.

When the optical fiber sensing mechanism is applied, the processing module can be one or more of microprocessors such as a single chip microcomputer, a DSP (digital signal processor), an ARM (advanced RISC machine), an FPGA (field programmable gate array) and the like, and can also be remote or cloud processing equipment such as an upper computer and the like, the signal connection between the processing module and the light sensing mechanism can be carried out in optical fiber, wireless communication and other modes, wherein the optical fiber is preferred, and the optical fiber can not be interfered in the running environment of the transformer.

The increment and the acceleration of the fault gas in the light gas relay can be judged according to the light change data based on the following steps:

according to the size change of the light irradiation area in the vertical direction, the increment of fault gas in the light gas relay can be converted through a trigonometric function;

the size change of the light irradiation area in the vertical direction is derived from time, and the acceleration rate of the fault gas can be converted by combining a trigonometric function and the size of the cavity.

Further, the light emitting mechanism includes a light source element; the light emitting end of the light source element faces the photosensitive mechanism.

When the invention is applied, the light source element can be various light sources which can generate divergent light beams, such as light emitting diodes, and the like, and can also be realized by adopting a row of concentrated light beams corresponding to the photosensitive mechanism, wherein the light emitting diodes are preferred from the aspects of interference resistance, cost, and the like.

Further, the light source element is a light emitting diode.

Further, the photosensitive mechanism comprises a plurality of prisms and a plurality of photosensitive elements matched with the prisms;

the plurality of photosensitive elements are arranged from top to bottom in sequence, and the plurality of prisms are arranged from top to bottom in sequence;

when the prism receives the light, the light is transmitted to the photosensitive element corresponding to the prism.

When the invention is applied, because the light emitted by the light emitting diode is slightly weak, the invention sets a prism corresponding to each photosensitive element as a light path for each photosensitive element, so that the detection precision can be further improved by the way, and the subsequent operation is facilitated.

Further, the photosensitive mechanism acquires light change data according to the time difference of the light detected by the plurality of photosensitive elements.

Further, the photosensitive element is a photodiode.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the photoinduction light gas relay can effectively analyze the fault development condition, can ensure the personal safety of personnel, lightens the manual workload, improves the working efficiency, and has high judgment accuracy by analyzing the gas growth rate in the judgment process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a front view of a structure according to an embodiment of the present invention;

FIG. 2 is a side view of the structure of an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1-light gas relay body, 2-cavity, 3-float bowl, 4-photosensitive mechanism, 5-luminous mechanism, 6-transformer oil, 41-prism, 42-photosensitive element and 51-light source element.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.