Gas relay checking table and checking method for simulating vibration-inrush current working condition

Abstract

The invention discloses a gas relay verification table and verification method for simulating a vibration-inrush current working condition. The gas relay verification table comprises a vibration table, an oil tank, a first oil conveying pipeline, a gas tank, a gas conveying pipeline, an oil conservator, a second oil conveying pipeline, a flow velocity sensor and a butterfly valve. A gas relay is arranged on the vibration table, and the vibration table can vibrate vertically and / or horizontally. The first oil pipeline communicates with the oil tank and the gas relay. The gas pipeline communicates with the gas tank and the oil tank. The oil conservator is communicated with the gas relay. The second oil pipeline is communicated with the gas relay and the conservator. And the butterfly valve is arranged on the gas pipeline. The flow velocity sensor is arranged on the first oil conveying pipeline and / or the second oil conveying pipeline. The vibration sensor is arranged on the vibration table.

Description

Technical Field

[0001] The present invention relates to the field of gas relays, and particularly to a gas relay calibration bench and a calibration method for simulating vibration-inrush conditions. Background Art

[0002] Under normal circumstances, the gas relay undertakes the function of quickly giving an alarm or triggering a trip when abnormal conditions occur inside the transformer, so as to effectively protect the transformer. However, in the actual operating environment, even if no fault occurs inside the transformer, misoperation of the gas relay may be caused by non-internal fault phenomena such as surges in magnetizing inrush current and external short circuits. This misoperation phenomenon is often not caused by vibration or inrush alone, but is the result of the interaction and superposition of the two.

[0003] The anti-misoperation performance of the gas relay is directly related to its sensitive response and the reliability of stable operation. In order to more accurately evaluate its performance under such complex conditions, it is particularly important to conduct a special vibration-inrush superposition effect test. Summary of the Invention

[0004] The present invention provides a gas relay calibration bench and a calibration method for simulating vibration-inrush conditions, which can simulate the vibration and oil flow surge phenomena at the fault site of oil-filled equipment, and detect the inrush velocity, inrush acceleration and vibration magnitude when the relay operates, so as to judge the operating ability of the relay.

[0005] An embodiment of the present invention provides a gas relay calibration bench for simulating vibration-inrush conditions, including a vibration table, an oil tank, a first oil pipeline, a gas tank, a gas pipeline, an oil conservator, a second oil pipeline, a flow velocity sensor, and a butterfly valve. A gas relay is arranged on the vibration table, and the vibration table can vibrate vertically and / or horizontally. The first oil pipeline connects the oil tank and the gas relay. The gas pipeline connects the gas tank and the oil tank. The oil conservator is connected to the gas relay. The second oil pipeline connects the gas relay and the oil conservator. The butterfly valve is arranged on the gas pipeline. The flow velocity sensor is arranged on the first oil pipeline and / or the second oil pipeline. A vibration sensor is arranged on the vibration table.

[0006] In some of these embodiments, the gas relay calibration bench includes a first vertical telescopic frame and a second vertical telescopic frame. The gas tank and the oil tank are arranged on the first vertical telescopic frame. The oil conservator is arranged on the second vertical telescopic frame.

[0007] In some embodiments, the first oil pipeline includes a first hard pipe section, a first soft pipe section, and a second hard pipe section, the first end of the first hard pipe section is connected to the oil tank, the second end of the first hard pipe section is connected to the first end of the second hard pipe section via the first soft pipe section, and the second end of the second hard pipe section is connected to the gas relay. The second oil pipeline includes a third hard pipe section, a second soft pipe section, and a fourth hard pipe section, the first end of the third hard pipe section is connected to the oil pillow, the second end of the third hard pipe section is connected to the first end of the fourth hard pipe section via the second soft pipe section, and the second end of the fourth hard pipe section is connected to the gas relay.

[0008] In some embodiments, the gas tank is equipped with a pressure gauge, a gas tank air inlet valve and a gas tank exhaust valve. The oil tank has an oil filling port, and the oil tank is equipped with an oil tank air inlet valve and an oil tank exhaust valve.

[0009] An embodiment of the present invention provides a calibration method using the above-mentioned gas relay calibration bench, comprising the following steps: transporting the oil in the oil tank into the gas relay and into the oil pillow until the oil level in the oil pillow is higher than the top horizontal plane of the gas relay. Exhausting the gas relay. Allowing the vibration table to drive the gas relay to vibrate vertically and / or horizontally. Flushing the gas in the gas tank into the oil tank to generate a pressure shock in the oil tank, causing oil flow surges in the pipeline where the gas relay is located, and causing the gas relay to operate. Recording the flow rate signal of the flow rate sensor and the vibration signal of the vibration sensor when the gas relay operates.

[0010] In some of the embodiments, the oil in the oil tank is transported into the gas relay and then into the oil pillow until the oil level in the oil pillow is higher than the top horizontal plane of the gas relay, including: opening the oil tank air inlet valve, inflating the oil tank with an air source, transporting the oil in the oil tank into the gas relay and then into the oil pillow, and when it is observed that the oil level in the oil pillow is higher than the top horizontal plane of the gas relay, closing the oil tank air inlet valve.

[0011] In some embodiments, venting the gas relay includes: opening a vent valve of the gas relay to vent the gas, and closing the vent valve after the venting is completed.

[0012] In some of the embodiments, the gas in the gas tank is rushed into the oil tank, causing a pressure shock in the oil tank, an oil flow surge in the pipeline where the gas relay is located, and the gas relay is actuated, including: opening the gas tank, observing the value on the pressure gauge of the gas tank, and after the pressure rises to a set pressure value, controlling the butterfly valve to open, and under the action of the pressure shock, a pressure shock is generated in the oil tank, the insulating oil in the oil tank is sprayed out, and an oil flow surge is generated in the pipeline where the gas relay is located, and after the action threshold of the gas relay is reached, the gas relay is actuated.

[0013] In some of the embodiments, the gas relay actuates, including: the gas relay actuates heavily and sends a trip signal.

[0014] In some of these embodiments, after recording the flow rate signals of the flow rate sensors and the vibration signals of the vibration sensors before and after the gas relay operates, the butterfly valve is closed, and the gas tank exhaust valve and the oil tank exhaust valve are opened to relieve the pressure, so that the pressure gauge reading returns to zero.

[0015] A gas relay calibration bench for simulating vibration-inrush conditions according to an embodiment of the present invention includes a vibration table, an oil tank, a first oil pipeline, a gas tank, a gas pipeline, an oil conservator, a second oil pipeline, a flow rate sensor, and a butterfly valve. A gas relay is provided on the vibration table, and the vibration table can vibrate vertically and / or horizontally. The first oil pipeline connects the oil tank and the gas relay. The gas pipeline connects the gas tank and the oil tank. The oil conservator is connected to the gas relay. The second oil pipeline connects the gas relay and the oil conservator. The butterfly valve is provided on the gas pipeline. The flow rate sensor is provided on the first oil pipeline and / or the second oil pipeline. The vibration sensor is provided on the vibration table. The gas relay calibration bench of the present invention can simulate the vibration and oil flow surge phenomena at the internal and external fault sites of oil-filled equipment, detect the inrush speed, inrush acceleration, and vibration magnitude when the relay operates with heavy gas, so as to be able to judge the operating ability and anti-misoperation ability of the relay, obtain the fault degree of the oil-filled equipment that the relay can protect and the external fault degree that the relay can avoid, and provide a basis for the selection of relays for oil-filled equipment. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the gas relay calibration bench in the embodiment of the present invention when the vibration table vibrates horizontally;

[0018] Figure 2 It is a schematic structural diagram of the gas relay calibration bench in the embodiment of the present invention when the vibration table vibrates vertically. Detailed Embodiments

[0019] In order to make the purpose, technical solutions, and advantages of the present invention clearer, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Refer to Figure 1-2, an embodiment of the present invention provides a gas relay calibration bench for simulating vibration-inrush conditions, including a vibration table 2, an oil tank 3, a first oil pipeline 4, a gas tank 5, a gas pipeline 6, an oil conservator 7, a second oil pipeline 8, a butterfly valve 9, a flow velocity sensor 10, a vibration sensor, a first vertical telescopic frame 11, and a second vertical telescopic frame 12.

[0021] The vibration table 2 is used to perform vertical vibration or horizontal vibration on the gas relay 1. The vibration table 2 can perform vertical vibration and / or horizontal vibration. The gas relay 1 is horizontally arranged on the vibration table 2. The gas relay 1 can be a relay of φ25, φ50, φ80 series.

[0022] The oil tank 3 is used to store insulating oil, and the insulating oil is used to provide oil flow. The oil tank 3 has an oil tank filling port 301 to realize filling insulating oil into the oil tank 3. An oil tank inlet valve 302 and an oil tank exhaust valve 303 are installed on the oil tank 3 to realize on-off air intake and on-off exhaust of the oil tank 3.

[0023] The first oil pipeline 4 is used to transport insulating oil into the gas relay 1. The first oil pipeline 4 connects the oil tank 3 and the gas relay 1. The first oil pipeline 4 includes a first hard pipe section 401, a first flexible pipe section 402, and a second hard pipe section 403. The first end of the first hard pipe section 401 is connected to the oil tank 3, the second end of the first hard pipe section 401 is connected to the first end of the second hard pipe section 403 through the first flexible pipe section 402, and the second end of the second hard pipe section 403 is connected to the gas relay 1.

[0024] The gas tank 5 is used to store gas, and the gas is used to apply pressure to the oil tank 3 to generate oil flow surges. A pressure gauge 501, a gas tank inlet valve 502, and a gas tank exhaust valve 503 are installed on the gas tank 5 to realize on-off air intake and on-off exhaust of the gas tank 5.

[0025] The gas pipeline 6 is used to transport gas into the oil tank 3. The gas pipeline 6 connects the gas tank 5 and the oil tank 3, so that oil flow surges are generated in the oil tank 3 under the air pressure of the gas tank 5.

[0026] The oil conservator 7 is used to store the insulating oil flowing through the gas relay 1 and plays a role in buffering the insulating oil. The oil conservator 7 is connected to the gas relay 1.

[0027] The second oil pipeline 8 is used to transport the insulating oil flowing through the gas relay 1 into the oil conservator 7. The second oil pipeline 8 connects the gas relay 1 and the oil conservator 7. The second oil pipeline 8 includes a third hard pipe section 801, a second flexible pipe section 802, and a fourth hard pipe section 803. The first end of the third hard pipe section 801 is connected to the oil conservator 7, the second end of the third hard pipe section 801 is connected to the first end of the fourth hard pipe section 803 through the second flexible pipe section 802, and the second end of the fourth hard pipe section 803 is connected to the gas relay 1.

[0028] The butterfly valve 9 is used to control the on-off of the gas transmission pipeline 6. The butterfly valve 9 is arranged on the gas transmission pipeline 6. A pressure gauge 501 is arranged on the butterfly valve 9 to measure the pressure inside the gas transmission pipeline 6.

[0029] The flow velocity sensor 10 is used to monitor the flow velocity signal of the insulating oil flowing through the gas relay 1 under the impact of transient oil flow. The flow velocity sensor 10 is arranged on the first oil transmission pipeline 4 and / or the second oil transmission pipeline 8. For example, the flow velocity sensor 10 is arranged on the third rigid pipe section 801 of the second oil transmission pipeline 8. The flow velocity sensor 10 can be an external-mounted flow velocity sensor 10.

[0030] The vibration sensor is used to measure the vibration signal on the vibration table 2. The vibration sensor is arranged on the vibration table 2. The vibration sensor can be a three-axis vibration sensor.

[0031] Under the above conditions, the gas relay 1, the first flexible pipe section 402, the second flexible pipe section 802, and the flow velocity sensor 10 form a replaceable measurement loop 13, and the replaceable measurement loop 13 is detachably connected to the oil tank 3 and the oil conservator 7.

[0032] The first vertical telescopic frame 11 is used to adjust the installation heights of the gas tank 5 and the oil tank 3 to cooperate with the vibration table 2 to carry out the vibration-oil flow surging superposition test. The first vertical telescopic frame 11 is vertically adjustable. The gas tank 5 and the oil tank 3 are arranged on the first vertical telescopic frame 11.

[0033] The second vertical telescopic frame 12 is used to adjust the installation height of the oil conservator 7 to cooperate with the vibration table 2 to carry out the vibration-oil flow surging superposition test. The second vertical telescopic frame 12 is vertically adjustable. The oil conservator 7 is arranged on the second vertical telescopic frame 12.

[0034] Under the above conditions, when the vibration table 2 vibrates the gas relay 1 in the horizontal direction, the first vertical telescopic frame 11 and the second vertical telescopic frame 12 lower their heights to keep the gas relay 1 horizontal. When the vibration table 2 vibrates the gas relay 1 in the vertical direction, the first vertical telescopic frame 11 and the second vertical telescopic frame 12 raise their heights to keep the gas relay 1 horizontal.

[0035] The gas relay calibration bench of the present invention can simulate the process in which when a fault occurs inside or outside the transformer, resulting in a sudden pressure rise, causing the oil flow to quickly rush towards the oil conservator 7. It can simulate the vibration-inrush superimposed working condition. Moreover, the gas relay calibration bench also has the ability to conduct vibration tests and inrush tests separately, with complete functions. In addition, the gas relay calibration bench of the present invention has three completely independent sets of replaceable measurement circuits 13, pipelines, valves, etc., and can directly detect various models of domestic and imported gas relays of the φ25, φ50, and φ80 series, with a very high degree of flexibility. Furthermore, the working power supply of the gas relay calibration bench of the present invention is 380V / 220V, the working environment is room temperature, the relative humidity is <85%, the altitude is <2000m, the working medium is transformer oil, the pressure detection range is 0.00 - 0.60MPa, and the flow velocity test range is 0.5 - 8.0m / s ± 0.5%.

[0036] Refer to Figure 1-2 , an embodiment of the present invention provides a calibration method using the above-mentioned gas relay calibration bench, including the following steps:

[0037] (1) Connect the components of the gas relay calibration bench.

[0038] In the above steps, select the corresponding replaceable measurement circuit 13 according to the diameter of the gas relay 1 to be tested. When conducting a horizontal vibration test on the gas relay 1, connect the components of the gas relay calibration bench as shown in Figure 1 . When conducting a vertical vibration test, adjust the first telescopic heightening frame and the second telescopic heightening frame and connect the components of the gas relay calibration bench as shown in Figure 2 .

[0039] After installing the gas relay 1, power on the gas relay calibration bench.

[0040] (2) Transport the oil in the oil tank 3 to the gas relay 1 and then to the oil conservator 7 until the oil level in the oil conservator 7 is higher than the top horizontal plane of the gas relay 1.

[0041] The above steps are specifically as follows: Open the oil tank inlet valve 302, use the gas source to inflate the oil tank 3, transport the oil in the oil tank 3 to the gas relay 1 and then to the oil conservator 7. When observing that the oil level in the oil conservator 7 is higher than the top horizontal plane of the gas relay 1, close the oil tank inlet valve 302.

[0042] (3) Exhaust the gas relay 1.

[0043] The above steps are specifically as follows: Open the gas release valve of the gas relay 1 to exhaust the gas, and close the gas release valve after the exhaust is completed.

[0044] (4) Let the shaking table 2 drive the gas relay 1 to vibrate vertically and / or horizontally.

[0045] The above steps are specifically as follows: Start the test, set the parameters of the shaking table 2, and start to let the shaking table 2 drive the gas relay 1 to vibrate vertically and / or horizontally.

[0046] (5) Fill the gas in the gas tank 5 into the oil tank 3 to generate a pressure shock in the oil tank 3, cause an oil flow surge in the pipeline where the gas relay 1 is located, and the gas relay 1 operates.

[0047] The above steps are specifically as follows: Open the gas tank 5, observe the value on the pressure gauge 501 of the gas tank 5. After the value rises to the pressure value set in the test, control the butterfly valve 9 to open suddenly. Under the action of this pressure shock, a pressure shock is generated in the oil tank 3, the insulating oil in the oil tank 3 jets out, an oil flow surge is generated in the pipeline where the gas relay 1 is located. After reaching the action threshold of the gas relay 1, the gas relay 1 operates. Among them, the operation of the gas relay 1 specifically means: The heavy gas of the gas relay 1 operates and issues a tripping signal.

[0048] (6) Record the flow velocity signal of the flow velocity sensor 10 and the vibration signal of the vibration sensor when the gas relay 1 operates.

[0049] In the above steps, record the moment when the gas relay 1 operates, and at the same time record the flow velocity signal of the flow velocity sensor 10 and the vibration signal of the vibration sensor during the operation period of the gas relay 1. It is also possible to first record the instantaneous flow velocity signal detected when the vibration test bench vibrates.

[0050] After recording the flow velocity signal of the flow velocity sensor 10 and the vibration signal of the vibration sensor before and after the operation of the gas relay 1, that is, after the test is completed, close the butterfly valve 9, open the gas tank exhaust valve 503 and the oil tank exhaust valve 303 to relieve the pressure. After the indication value of the pressure gauge 501 returns to zero, turn off the gas source and cut off the power.

[0051] The calibration method of the present invention can simulate the influence of the superposition of vibration and inrush current on the gas relay 1 in a real scenario, thereby not only verifying the anti-misoperation ability of the gas relay 1, but also providing a strong basis for in-depth research on the relevant action mechanism and optimizing the product design.

[0052] The embodiment of the present invention also provides a computer storage medium. The computer storage medium includes computer instructions, and when it runs on a computer, it causes the computer to execute the above method.

[0053] The embodiment of the present invention also provides an electronic device. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. Among them, when the processor executes the computer program, it implements the above method.

[0054] Generally speaking, in the actual operating environment, the operation of the relay is often affected by the superposition of vibration and oil flow surging. Currently, there are only vibration test benches and oil flow test benches for the relay, but there is no test bench that can apply vibration and inrush current simultaneously, and it is impossible to simulate the actual working conditions. The gas relay calibration bench of the present invention can simulate the vibration and oil flow surging phenomena in the internal and external fault sites of oil-filled equipment, and detect the inrush current speed, inrush current acceleration and vibration magnitude when the heavy gas of the relay operates, so as to judge the operation ability and anti-misoperation ability of the relay, obtain the fault degree of the oil-filled equipment that the relay can protect and the external fault degree that the relay can avoid, and provide a basis for the selection of the relay for the oil-filled equipment.

[0055] In the attached drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only used for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas relay test bench simulating vibration-inrush working conditions, characterized in that: include: a vibration table on which a gas relay is arranged, the vibration table being capable of vibrating vertically and / or horizontally; Oil tank; a first oil pipeline, connecting the oil tank and the gas relay; Gas tank; A gas pipeline connecting the gas tank and the oil tank; An oil pillow, connected to the gas relay; a second oil pipeline, connecting the gas relay and the oil pillow; A butterfly valve is arranged on the gas pipeline; A flow rate sensor, arranged on the first oil pipeline and / or the second oil pipeline; The vibration sensor is arranged on the vibration platform.

2. The gas relay test stand as claimed in claim 1, characterized in that: include: a first vertical telescopic frame, on which the gas tank and the oil tank are arranged; A second vertical telescopic frame is provided with the oil pillow.

3. The gas relay test stand as claimed in claim 1, characterized in that: The first oil pipeline includes a first hard pipe section, a first soft pipe section, and a second hard pipe section, wherein a first end of the first hard pipe section is connected to the oil tank, a second end of the first hard pipe section is connected to a first end of the second hard pipe section via the first soft pipe section, and a second end of the second hard pipe section is connected to the gas relay; The second oil pipeline includes a third hard pipe section, a second soft pipe section and a fourth hard pipe section. The first end of the third hard pipe section is connected to the oil pillow, the second end of the third hard pipe section is connected to the first end of the fourth hard pipe section via the second soft pipe section, and the second end of the fourth hard pipe section is connected to the gas relay.

4. The gas relay test stand as claimed in claim 1, characterized in that: The gas tank is equipped with a pressure gauge, a gas tank air inlet valve and a gas tank exhaust valve; The oil tank is provided with an oil filling port, and an oil tank air inlet valve and an oil tank air exhaust valve are installed on the oil tank.

5. A calibration method using the gas relay calibration station according to any one of claims 1 to 4, characterized in that: The following steps are involved: The oil in the oil tank is transported into the gas relay and then into the oil conservator until the oil level in the oil conservator is higher than the top level of the gas relay; exhausting the gas relay; The vibration table drives the gas relay to vibrate vertically and / or horizontally; The gas in the gas tank is injected into the oil tank, so that a pressure shock is generated in the oil tank, and an oil flow surge is generated in the pipeline where the gas relay is located, and the gas relay is actuated; The flow rate signal of the flow rate sensor and the vibration signal of the vibration sensor when the gas relay is actuated are recorded.

6. The verification method according to claim 5, characterized in that: The oil in the oil tank is transported into the gas relay and then into the oil conservator until the oil level in the oil conservator is higher than the top level of the gas relay, including: Open the oil tank air inlet valve, use the air source to inflate the oil tank, transport the oil in the oil tank to the gas relay and then to the oil pillow, and when it is observed that the oil level in the oil pillow is higher than the top horizontal plane of the gas relay, close the oil tank air inlet valve.

7. The verification method according to claim 5, characterized in that: Exhausting the gas relay includes: Open the vent valve of the gas relay to exhaust gas, and close the vent valve after the exhaust is completed.

8. The verification method according to claim 5, characterized in that: The gas in the gas tank is injected into the oil tank, so that a pressure shock is generated in the oil tank, and an oil flow surge is generated in the pipeline where the gas relay is located, and the gas relay is actuated, including: Open the gas tank and observe the value on the pressure gauge of the gas tank. When the pressure rises to the set value, control the butterfly valve to open. Under the action of the pressure shock, a pressure shock is generated in the oil tank, and the insulating oil in the oil tank is sprayed out. An oil flow surge is generated in the pipeline where the gas relay is located. When the action threshold of the gas relay is reached, the gas relay is actuated.

9. The verification method according to claim 5, characterized in that: The gas relay action includes: The gas relay is activated by heavy gas and sends out a trip signal.

10. The verification method according to claim 5, characterized in that: After recording the flow rate signal of the flow rate sensor and the vibration signal of the vibration sensor when the gas relay is actuated, the butterfly valve is closed, and the gas tank exhaust valve and the oil tank exhaust valve are opened to release the pressure, so that the pressure indication value returns to zero.

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