Online particle content detection device for insulating oil of electrical equipment

Abstract

The utility model relates to the technical field of insulating oil detection, in particular to an on-line particle content detection device for insulating oil of electrical equipment, which comprises a transformer to be detected, a test oil tank, a cleaning agent storage tank, a flushing oil storage tank and a recovery tank, a granularity counter is arranged on the right side in the testing oil tank, an oil inlet pipeline is fixedly communicated between a lower outlet of the transformer to be tested and a first inlet of the testing oil tank, a flow controller is fixedly installed on the oil inlet pipeline, and a recycling pipeline is fixedly communicated between an outlet of the testing oil tank and the recycling tank. A cleaning agent pipeline is fixedly communicated between the outlet of the cleaning agent storage tank and the second inlet of the test oil tank; and a flushing oil pipeline is fixedly communicated between the outlet of the flushing oil storage tank and the recovery pipeline. According to the utility model, on-line continuous detection and filtration of the particle content of the insulating oil in the electrical equipment body are realized, and reliable data support and guarantee are provided for stable and normal operation of the electrical equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating oil detection, and is an on-line particle content detection device for insulating oil of electrical equipment. Background Art

[0002] Transformer insulating oil can achieve good insulation between the transformer line ends, between the high and low voltage coils, between the coils and the grounded iron core and the oil tank wall, so as to avoid short circuits and arcs. When the transformer is running, the current passes through the coil, and part of the power loss is caused by resistance, which is called "copper loss". When the current passes through the iron core, the power loss caused by the change of the iron core magnetic flux is called "iron core loss". Both of these power losses are manifested in the form of heat. The running transformer oil dissipates heat to the atmosphere through hot and cold cycle convection, so that the operating temperature of the transformer is not too high.

[0003] Under the action of the DC electric field, the insulating oil in the transformer is prone to precipitation and accumulation of impurity particles, which can easily induce partial discharge or dielectric breakdown, thus posing a great threat to the insulation performance. Aging and degradation of the internal oil-paper insulation, partial discharge, mechanical action of the on-load tap changer or oil pump, etc., will all cause tiny impurity particles of different properties to be generated in the oil. Under the action of the DC electric field component, the particles in the oil accumulate into bridges, which greatly increases the conductivity of the oil and causes significant distortion of the electric field distribution in the oil. Compared with the DC breakdown voltage in the non-preload mode, the accumulation of particles formed in the DC preload mode causes the DC breakdown field strength of the oil to decrease significantly, with a decrease of more than 30%.

[0004] The oil flow velocity distribution characteristics of the vertical and horizontal oil channels of the transformer high-voltage winding are similar. Compared with the vertical oil channel, the oil flow velocity of the horizontal oil channel is very low. The insulating oil in the horizontal oil channel in the middle of the winding is close to stagnant (0.0005m / s), forming a "dead oil zone". Since the insulating oil in the "dead oil zone" has a very low flow velocity, a large number of particulate impurities generated in the transformer are gathered in this area, resulting in inaccurate monitoring of the particle content in the insulating oil. After these particulate impurities circulate to other areas, they may cause equipment failure, reduced insulation performance, and even accidents. It is impossible to truly and accurately monitor the insulating oil particle content in each area of ​​the transformer, and it is impossible to process the impurity particles deposited in the "dead oil zone" during the operation of the transformer. Summary of the invention

[0005] The utility model provides an on-line particle content detection device for insulating oil of electrical equipment, which overcomes the above-mentioned shortcomings of the prior art and can effectively solve the problem of inaccurate monitoring of particle content in the existing insulating oil.

[0006] The technical scheme of the utility model is realized through the following measures: an online particle content detection device for insulating oil of electrical equipment, comprising a transformer to be tested, a test oil tank, a cleaning agent storage tank, a flushing oil storage tank, and a recovery tank, a dust cover is arranged outside the test oil tank, a light source is arranged on the left side of the test oil tank, a particle size counter is arranged on the right side of the test oil tank, an oil inlet pipeline is fixedly connected between the lower outlet of the transformer to be tested and the first inlet of the test oil tank, a flow controller is fixedly installed on the oil inlet pipeline, a recovery pipeline is fixedly connected between the outlet of the test oil tank and the recovery tank, a cleaning agent pipeline is fixedly connected between the outlet of the cleaning agent storage tank and the second inlet of the test oil tank, and a flushing oil pipeline is fixedly connected between the outlet of the flushing oil storage tank and the recovery pipeline.

[0007] The following are further optimizations and / or improvements to the above utility model technical solution:

[0008] The above also includes a vacuum oil filter, a first return pipeline is fixedly connected between the vacuum oil filter inlet and the oil inlet pipeline between the oil inlet and the flow controller, and a second return pipeline is fixedly connected between the vacuum oil filter outlet and the upper inlet of the transformer to be tested.

[0009] A three-way valve is fixedly installed on the oil inlet pipeline between the inlet of the oil inlet pipeline and the flow controller. The lower port and the right port of the three-way valve are connected to the oil inlet pipeline, and the upper port of the three-way valve is fixedly connected to the first return pipeline.

[0010] A delivery pump is fixedly installed on the first reflux pipeline.

[0011] A first valve is fixedly installed on the cleaning agent pipeline, and a second valve is fixedly installed on the flushing oil pipeline.

[0012] The above also includes a computer control module. The three-way valve, the first valve and the second valve are all electrically controlled valves. The control ends of the three-way valve, the first valve and the second valve and the particle size counter are all electrically connected to the computer control module.

[0013] The utility model has a reasonable and compact structure and is easy to use. It realizes online continuous detection and filtering of the insulating oil particle content in the electrical equipment body, provides reliable data support and guarantee for ensuring the stable and normal operation of the electrical equipment, and has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.

[0015] The codes in the accompanying drawings are: 1 is the transformer to be tested, 2 is the test oil tank, 3 is the cleaning agent storage tank, 4 is the flushing oil storage tank, 5 is the dust cover, 6 is the light source, 7 is the particle size counter, 8 is the oil inlet pipeline, 9 is the flow controller, 10 is the recovery pipeline, 11 is the cleaning agent pipeline, 12 is the flushing oil pipeline, 13 is the vacuum oil filter, 14 is the first reflux pipeline, 15 is the second reflux pipeline, 16 is the three-way valve, 17 is the delivery pump, 18 is the first valve, 19 is the second valve, 20 is the computer control module, and 21 is the recovery tank. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0017] In the present invention, unless otherwise specified, the devices and apparatuses used are all known and commonly used devices and apparatuses in the art. In the present invention, for the convenience of description, the relative position relationship of each component is described based on the attached manual. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0018] The present invention will be further described below in conjunction with the embodiments and drawings:

[0019] Embodiment 1: As attached Figure 1 As shown, the online particle content detection device for insulating oil of electrical equipment includes a transformer to be tested 1, a test oil tank 2, a cleaning agent storage tank 3, a flushing oil storage tank 4, and a recovery tank 21. A dust cover 5 is arranged on the outside of the test oil tank 2, a light source 6 is arranged on the left side of the test oil tank 2, and a particle size counter 7 is arranged on the right side of the test oil tank 2. An oil inlet pipeline 8 is fixedly connected between the lower outlet of the transformer to be tested 1 and the first inlet of the test oil tank 2, and a flow controller 9 is fixedly installed on the oil inlet pipeline 8. A recovery pipeline 10 is fixedly connected between the outlet of the test oil tank 2 and the recovery tank 21, a cleaning agent pipeline 11 is fixedly connected between the outlet of the cleaning agent storage tank 3 and the second inlet of the test oil tank 2, and a flushing oil pipeline 12 is fixedly connected between the outlet of the flushing oil storage tank 4 and the recovery pipeline 10.

[0020] According to actual needs, the above-mentioned on-line particle content detection device for insulating oil of electrical equipment can be further optimized and / or improved:

[0021] Embodiment 2: It is different from Embodiment 1 in that: Figure 1As shown, the online particle content detection device for insulating oil of electrical equipment also includes a vacuum oil filter 13, a first return pipeline 14 is fixedly connected between the inlet of the vacuum oil filter 13 and the oil inlet pipeline 8 between the inlet of the oil inlet pipeline 8 and the flow controller 9, and a second return pipeline 15 is fixedly connected between the outlet of the vacuum oil filter 13 and the upper inlet of the transformer 1 to be tested.

[0022] Embodiment 3: It differs from Embodiment 1 to Embodiment 2 in that: Figure 1 As shown, a three-way valve 16 is fixedly installed on the oil inlet pipeline 8 between the inlet of the oil inlet pipeline 8 and the flow controller 9. The lower port and the right port of the three-way valve 16 are connected to the oil inlet pipeline 8, and the upper port of the three-way valve 16 is fixedly connected to the first return pipeline 14.

[0023] Embodiment 4: It differs from Embodiments 1 to 3 in that: Figure 1 As shown, a delivery pump 17 is fixedly installed on the first return line 14 .

[0024] Embodiment 5: It differs from Embodiments 1 to 4 in that: Figure 1 As shown, a first valve 18 is fixedly installed on the cleaning agent pipeline 11 , and a second valve 19 is fixedly installed on the flushing oil pipeline 12 .

[0025] Embodiment 6: It differs from Embodiments 1 to 5 in that: Figure 1 As shown, the online particle content detection device for insulating oil of electrical equipment also includes a computer control module 20, the three-way valve 16, the first valve 18, and the second valve 19 are all electrically controlled valves, and the control ends of the three-way valve 16, the first valve 18, and the second valve 19 and the particle size counter 7 are all electrically connected to the computer control module 20.

[0026] As needed, valves and instruments that enable the normal operation of the insulating oil online particle content detection device for electrical equipment are fixedly installed on each pipeline. Petroleum ether is stored in the cleaning agent storage tank 3 as a cleaning agent, and clean insulating oil is stored in the flushing oil storage tank 4 for assimilation of the medium in each pipeline in the device and as a baseline for particle content detection.

[0027] When in use, the particle counter 7 and the test oil tank 2 are cleaned with petroleum ether stored in the cleaning agent storage tank 3, and the petroleum ether is discharged to the recovery tank 21; the test oil tank 2, the particle counter 7 and the pipeline of the device are cleaned with the insulating oil stored in the flushing oil storage tank 4, and the flushing oil is discharged to the recovery tank 21. The three-way valve 16 is connected to the oil inlet pipeline 8, and the oil inlet amount of the test oil tank 2 is adjusted by the flow controller 9 on the oil inlet pipeline 8. The insulating oil in the test oil tank 2 is tested multiple times in the particle counter 7 to obtain the particle content of the insulating oil in the transformer 1 to be tested. After the test is completed, the particle counter 7 and the test oil tank 2 are cleaned with petroleum ether again. The vacuum oil filter device on the bypass is started according to the particle content detection value in the insulating oil, and the oil sample in the transformer body is vacuum filtered. When the particle content of the insulating oil in the transformer 1 to be tested is high or exceeds the standard limit, the upper and lower ports of the three-way valve 16 are connected, the delivery pump 17 is started, and the insulating oil is filtered through the vacuum filter.

[0028] In summary, the utility model carries out real-time monitoring and control of the particle content of the transformer insulating oil, can realize uninterrupted detection of the particle content in the insulating oil, and adjusts the vacuum oil filtration treatment of the transformer insulating oil according to the detection result, thereby ensuring the good performance of the insulating oil in the transformer. The utility model is simple and easy to operate, convenient to implement in various environments, and has good promotion value.

[0029] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An on-line particle content detection device for insulating oil of electrical equipment, characterized in that It includes a transformer to be tested, a test oil tank, a cleaning agent storage tank, a flushing oil storage tank, and a recovery tank. A dust cover is arranged on the outside of the test oil tank, a light source is arranged on the left side of the test oil tank, and a particle size counter is arranged on the right side of the test oil tank. An oil inlet pipeline is fixedly connected between the lower outlet of the transformer to be tested and the first inlet of the test oil tank, a flow controller is fixedly installed on the oil inlet pipeline, a recovery pipeline is fixedly connected between the outlet of the test oil tank and the recovery tank, a cleaning agent pipeline is fixedly connected between the outlet of the cleaning agent storage tank and the second inlet of the test oil tank, and a flushing oil pipeline is fixedly connected between the outlet of the flushing oil storage tank and the recovery pipeline.

2. The device for detecting the online particle content of insulating oil in electrical equipment according to claim 1 is characterized in that It also includes a vacuum oil filter, a first return pipeline is fixedly connected between the vacuum oil filter inlet and the oil inlet pipeline between the oil inlet and the flow controller, and a second return pipeline is fixedly connected between the vacuum oil filter outlet and the upper inlet of the transformer to be tested.

3. The device for detecting the online particle content of insulating oil in electrical equipment according to claim 2 is characterized in that A three-way valve is fixedly installed on the oil inlet pipeline between the inlet of the oil inlet pipeline and the flow controller. The lower port and the right port of the three-way valve are connected to the oil inlet pipeline, and the upper port of the three-way valve is fixedly connected to the first return pipeline.

4. The device for detecting the on-line particle content of insulating oil in electrical equipment according to claim 3 is characterized in that A delivery pump is fixedly installed on the first reflux pipeline.

5. The device for detecting the online particle content of insulating oil in electrical equipment according to claim 3 or 4, characterized in that A first valve is fixedly installed on the cleaning agent pipeline, and a second valve is fixedly installed on the flushing oil pipeline.

6. The device for detecting the on-line particle content of insulating oil in electrical equipment according to claim 5, characterized in that It also includes a computer control module. The three-way valve, the first valve and the second valve are all electrically controlled valves. The control ends of the three-way valve, the first valve and the second valve and the particle size counter are all electrically connected to the computer control module.

Images