A device for measuring the operating capacity of a gas relay

Abstract

The utility model provides a kind of determination device of gas relay action ability, comprising: test-bed body, transient oil flow excitation device, transient oil flow generating device and measuring unit;Transient oil flow generating device has transient oil flow generating cavity, and the oil outlet end of transient oil flow generating cavity is connected with the oil inlet end of the gas relay to be measured;Oil pillow is connected with the oil outlet end of gas relay, to store the insulating oil output by the gas relay to be measured;Transient oil flow excitation device is provided with air cannon to change air pressure energy into air jet power energy transmission to the transient oil flow generating cavity;Measuring unit is used to detect the parameters of the gas relay to be measured when transient oil flow impact occurs and the action image of baffle in the gas relay to be measured.The utility model can accurately simulate actual fault at the same time can simulate the case of multiple fault of transformer continuous occurrence, so that the determination result of the action ability of gas relay is more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas relay technology field, specifically, relate to a kind of gas relay action ability's measuring device. BACKGROUND

[0002] Relay protection device is the last solid defense line to guarantee the safe operation of various power equipment, and bears the important role of rapid isolation fault and preventing fault expansion. Gas relay is installed on the connecting pipe between transformer oil tank and oil storage tank, and can sensitively act on various abnormal conditions occurred in transformer, such as transformer interturn and interlayer short circuit, winding insulation deterioration, core and bushing internal fault, etc.

[0003] The sensitivity and reliability of gas relay depend on the setting value, therefore, the adjustment and setting of gas relay setting value play a key role in whether gas relay can function safely and reliably. However, current gas relay test bench mostly determines the action value of steady flow rate of gas relay to judge its action ability, but in actual fault condition, the heavy gas action of relay is often affected by transient impact oil flow, rather than steady oil flow, and at the same time of occurrence of transient impact oil flow, flow rate, pressure, vibration and other signals also change, only recording flow rate signal cannot fully restore fault site to comprehensively judge relay action ability. Most of current gas relay test benches are installed in circulating pipeline, and simulate test by oil flow generated by oil pump, which cannot simulate transient impact oil flow in actual fault condition. A small number of setting value calibration benches simulating transient oil flow are difficult to realize controllable pressure and multiple fault continuous occurrence, do not consider the structure of simulated oil pillow, corrugated pipe and oil tank, and are not equipped with multiple sensors to monitor multiple related parameters of heavy gas action. Therefore, it is necessary to propose a multi-parameter monitoring heavy gas setting value calibration bench simulating transient oil flow to simulate actual fault condition and record flow rate, pressure, vibration signal and other information when gas relay acts, so as to comprehensively judge the action ability of gas relay. SUMMARY

[0004] Therefore, the utility model proposes a kind of measuring device for monitoring gas relay action ability, to solve the problems of single determination data of gas relay action ability and low reliability of action ability determination in prior art.

[0005] In one aspect, the utility model provides a kind of measuring device for gas relay action ability, comprising: test bench body, transient oil flow excitation device, transient oil flow generating device and measuring unit;Wherein,

[0006] The transient oil flow generating device is arranged on the first side of the test bed body, and has a transient oil flow generating cavity, the oil outlet end of which is connected with the oil inlet end of the gas relay to be tested arranged in the horizontal direction, so as to fill the insulating oil, generate the transient oil flow, and deliver the transient oil flow to the gas relay to be tested.

[0007] The transient oil flow generating device further comprises an oil reservoir connected with the oil outlet end of the gas relay to be tested, so as to store the insulating oil outputted from the gas relay to be tested.

[0008] The transient oil flow exciting device is arranged on the second side of the test bed body, and the air cannon is arranged in the transient oil flow exciting device, the outlet end of the air cannon is connected with the inlet end of the transient oil flow generating cavity, so as to convert the air pressure energy into the air jet power energy and deliver the air jet power energy to the transient oil flow generating cavity, so that the insulating oil in the transient oil flow generating cavity generates the transient oil flow to enter the gas relay to be tested.

[0009] The measuring unit is arranged close to the gas relay to be tested, so as to detect the parameters of the gas relay to be tested and the action image of the baffle in the gas relay to be tested when the transient oil flow impact occurs.

[0010] Further, in the above-mentioned device for measuring the action capability of the gas relay, the measuring unit comprises an embedded liquid pressure sensor, an externally bound flow rate sensor, a three-way vibration acceleration sensor, and a camera.

[0011] The inlet end of the gas relay to be tested is connected with the transient oil flow generating device through pipeline one, and the embedded liquid pressure sensor is arranged on the pipeline one close to the inlet end of the gas relay to be tested, so as to monitor the pressure signal of the pipeline one under the transient oil flow impact.

[0012] The externally bound flow rate sensor is arranged on the pipeline one and located on one side of the embedded liquid pressure sensor, so as to monitor the flow rate signal of the insulating oil in the pipeline one under the transient oil flow impact.

[0013] The three-way vibration acceleration sensor is arranged on the gas relay to be tested, so as to monitor the vibration acceleration of the gas relay to be tested when the transient oil flow impact occurs.

[0014] The camera is arranged towards the observation window of the gas relay to be tested, so as to record the action image of the baffle.

[0015] Further, in the above-mentioned device for measuring the action capability of the gas relay, the embedded liquid pressure sensor is a high-frequency response type pressure transmitter.

[0016] Further, in the device for measuring the action capability of a gas relay, the external binding flow sensor is an ultrasonic flow meter.

[0017] Further, in the device for measuring the action capability of a gas relay, the oil pillow is arranged on the first side of the test bench body, and the oil pillow is connected to the oil outlet of the to-be-tested external relay through a corrugated pipe.

[0018] Further, in the device for measuring the action capability of a gas relay, a liquid level sensor is arranged in the transient oil flow generating cavity to detect the internal oil surface position in the transient oil flow generating cavity.

[0019] Further, in the device for measuring the action capability of a gas relay, the transient oil flow excitation device further comprises an air compressor.

[0020] The air outlet end of the air compressor is connected to the air cannon to convert air pressure energy into air jet power energy and deliver it to the air cannon.

[0021] Further, in the device for measuring the action capability of a gas relay, the air cannon comprises an air cannon body, a controller, a plurality of electromagnetic valves, and a plurality of discharge pipes.

[0022] The air cannon body has an air tank inside for receiving and storing compressed air entering from the air inlet;

[0023] A plurality of discharge pipes are arranged at the outlet end of the air cannon body and correspondingly arranged with the electromagnetic valves;

[0024] Each electromagnetic valve is connected to the air cannon body for controlling the release of compressed air from the air tank;

[0025] The controller is connected to each electromagnetic valve to control the corresponding electromagnetic valve to act to spray the compressed air in the air tank out through the corresponding discharge pipe.

[0026] Further, in the device for measuring the action capability of a gas relay, the test bench body comprises a first movable workbench and a second movable workbench.

[0027] The first movable workbench and the second movable workbench are arranged side by side and spaced apart, the transient oil flow generating device, the measuring unit, and the to-be-tested gas relay are arranged on the first movable workbench, and the transient oil flow excitation device is arranged on the second movable workbench.

[0028] Further, the measuring device for the action capability of the gas relay, the bottom of the first movable workbench and the second movable workbench are provided with a plurality of rollers, and each roller is provided with a brake.

[0029] The measuring device for the action capability of the gas relay in the utility model, through setting the transient oil flow generating device with air cannon to simulate the airflow with different energy generated by heavy gas fault, the airflow impacts the internal oil flow, the oil flow surges impact the gas relay baffle, the pipeline pressure, flow velocity, vibration acceleration, baffle action condition and heavy gas signal are measured by the measurement unit, the actual fault can be accurately simulated, and the multiple fault continuous occurrence of the transformer can be simulated, so that the measurement result of the action capability of the gas relay is more reliable BRIEF DESCRIPTION OF DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the present application. Furthermore, the same reference numerals are used throughout the several drawings to refer to same or like parts. In the drawings:

[0031] Figure 1 The structure schematic diagram of the measuring device for the action capability of the gas relay provided by the utility model embodiment. DETAILED DESCRIPTION

[0032] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown. It is to be understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. It is to be noted that the embodiments and features of the present disclosure can be combined with each other in the case of no conflict. The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] Reference Figure 1The utility model discloses a gas relay action ability's measuring device of embodiment includes: test table body 1, transient oil flow excitation device 2, transient oil flow generating device 3 and measurement unit 4, wherein, transient oil flow generating device 3 is located at the first side of test table body 1, and transient oil flow generating device 3 has transient oil flow generating cavity 31, and the oil outlet end of transient oil flow generating cavity 31 is connected with the oil inlet end of the gas relay 8 along the horizontal direction setting, to fill the insulating oil and produce transient oil flow and deliver the transient oil flow to the gas relay 8 of measurement, transient oil flow generating device 3 still includes oil pillow 32, and the oil outlet end of oil pillow 32 is connected with the gas relay 8 of measurement, to store the insulating oil that passes through the gas relay 8 of measurement output, transient oil flow excitation device 2 is arranged at the second side of test table body 1, and air cannon 21 is arranged in transient oil flow excitation device 2, and the outlet end of air cannon 21 is connected with the inlet end of transient oil flow generating cavity 31, to change air pressure energy into air jet power energy transmission to transient oil flow generating cavity 31, and then make the insulating oil in transient oil flow generating cavity 31 produce transient oil flow to enter the gas relay 8 of measurement, measurement unit 4 is close to the gas relay 8 of measurement and is arranged, to detect the parameters of the gas relay 8 of measurement when transient oil flow impact occurs and the action image of the baffle (not shown in the drawing) in the gas relay 8 of measurement.

[0034] Specifically, the test table body 1 includes: a first movable workbench 11 and a second movable workbench 12; wherein, the first movable workbench 11 and the second movable workbench 12 are arranged side by side and spaced apart, the transient oil flow generating device 3, the measurement unit 4 and the gas relay 8 under test are placed on the first movable workbench 11, and the transient oil flow excitation device 2 is arranged on the second movable workbench 12.

[0035] The first movable workbench 11 can include an upper layer platform and a lower layer platform, and the measurement unit 4 and the gas relay 8 under test are arranged on the upper layer platform; the transient oil flow generating device 3 is arranged on the lower layer platform to excite transient oil flow.

[0036] Preferably, the bottom of the first movable workbench 11 and the second movable workbench 12 is provided with a plurality of rollers, and each roller is provided with a brake.

[0037] The transient oil flow generating device 3 is provided with a transient oil flow generating cavity 31 and an oil pillow 32, and the transient oil flow generating cavity 31 has an oil inlet a, an air inlet b, a bottom oil outlet c and an exhaust port d for releasing pressure by discharging internal air after the experiment. The oil inlet a, the air inlet b and the exhaust port d are respectively arranged at the top of the transient oil flow generating cavity 31.

[0038] A liquid level sensor 5 is arranged in the transient oil flow generating cavity 31 to detect the oil level in the transient oil flow generating cavity 31.

[0039] The oil pillow 32 is arranged on the first side of the test bench body 1 and connected to the oil outlet end of the gas relay to be tested through the corrugated pipe 6, and is used to store the insulating oil passing through the gas relay and to buffer the insulating oil. The corrugated pipe 6 is used to connect the pipes, eliminate the assembly deviation caused by the connection, and suppress the pipe oscillation.

[0040] The gas relay to be tested includes an oil outlet end connected to the oil pillow 32 through the corrugated pipe 6, an oil inlet end connected to the bottom oil outlet through the pipe, and a baffle arranged between the oil outlet end and the oil inlet end.

[0041] The transient oil flow excitation device 2 is arranged on the second side of the test bench body 1, and uses the air cannon 21 to convert the air pressure energy into air jet power energy to realize the pulsed oil flow with controllable pressure, so as to simulate the different energy oil flow generated by the heavy gas fault and to be more consistent with the actual fault.

[0042] Further, the transient oil flow excitation device 2 further includes an air compressor 22, wherein the air outlet end of the air compressor 22 is connected to the air cannon 21 to convert the air pressure energy into air jet power energy and deliver it to the air cannon 21.

[0043] The measurement unit 4 in the embodiment can include various sensors and can detect various data, so that the evaluation result of the action ability of the gas relay is more reliable.

[0044] Preferably, the measurement unit 4 can include an embedded liquid pressure sensor 41, an external flow rate sensor 42, a three-way vibration acceleration sensor 43, and a camera 44; wherein the inlet end of the gas relay to be tested 8 is connected to the transient oil flow generating device 3 through the pipe 1, the embedded liquid pressure sensor 41 is arranged on the pipe 1 close to the inlet end of the gas relay to be tested 8 to monitor the pressure signal of the first pipe 1 under the impact of the transient oil flow; the external flow rate sensor 42 is arranged on the pipe 1 and located on one side of the embedded liquid pressure sensor 41 to monitor the flow rate signal of the insulating oil in the pipe 1 under the impact of the transient oil flow; the three-way vibration acceleration sensor 43 is arranged on the gas relay to be tested 8 to monitor the vibration acceleration of the gas relay to be tested 8 when the transient oil flow impact occurs; and the camera 44 is arranged towards the observation window of the gas relay to be tested 8 to record the action image of the baffle.

[0045] Specifically, the embedded liquid pressure sensor 41 is preferably a high-frequency response pressure transmitter.

[0046] The external binding flow rate sensor 42 is preferably an ultrasonic flow meter, the sensor response time is 10 ms, and the measurement range is 0.01 m / s-25 m / s. The camera 44 can be a high-definition camera 44.

[0047] The utility model uses air cannon 21 simulates different energy airflow generated by heavy gas fault, airflow impacts internal oil flow, and oil flow surge impacts gas relay baffle to make heavy gas act, and combines with embedded liquid pressure sensor 41, external binding flow rate sensor 42, three-way vibration acceleration sensor 43 high-definition camera 44 to measure and identify the pipeline pressure, flow rate, vibration acceleration, baffle action condition when heavy gas acts. Heavy gas measurement signal terminal can also be arranged in the measurement unit 4 to detect heavy gas action signal.

[0048] Obviously, the above can be concluded that the measuring device for the action ability of the gas relay provided in the embodiment, by setting the air cannon 21 cooperating with the transient oil flow generating device 3 to simulate different energy airflow generated by heavy gas fault, airflow impacts internal oil flow, oil flow surge impacts gas relay baffle, combined with the measurement unit 4 to measure the pipeline pressure, flow rate, vibration acceleration and baffle action condition and heavy gas signal, can accurately simulate the actual fault at the same time can simulate the situation of multiple fault continuous occurrence of transformer, so that the determination result of the action ability of the gas relay is more reliable.

[0049] Continuing to refer to Figure 1 In the above embodiment, the air cannon 21 comprises: an air cannon body 211, a controller (not shown in the figure), a plurality of electromagnetic valves 212 and a plurality of discharge pipes 213; wherein the air cannon body 211 has a gas tank inside, for receiving and storing compressed air entering from the air inlet; a plurality of discharge pipes 213 are arranged at the outlet end of the air cannon body 211, and are correspondingly arranged with each electromagnetic valve 212; each electromagnetic valve 212 is connected with the air cannon body 211, for controlling the release of compressed air from the gas tank; the controller is connected with each electromagnetic valve 212, to control the corresponding electromagnetic valve 212 to act to jet the compressed air in the gas tank out through the corresponding discharge pipe 213.

[0050] Specifically, the electromagnetic valve 212 can be 3-5, and correspondingly, the discharge pipe 213 can be provided with 3-5 paths. The gas tank is provided with a pressure sensor for monitoring the pressure of the compressed air in the gas tank, and feeding back the pressure information to the controller.

[0051] The number of electromagnetic valves 212 to be fired, simultaneous firing or sequential firing and firing interval time, the excitation pressure size of the electromagnetic valve 212, etc. can be set, so that the electromagnetic valve 212 valve of the corresponding port is started, which can be used to simulate multiple fault phenomena, and different faults can also be simulated by setting the multi-port air cannon 21, such as changing the size of the fault (the excitation pressure size of the electromagnetic valve 212), the number of continuous faults and the interval time (the number of valves to be fired, simultaneous firing or sequential firing and firing interval time).

[0052] In order to meet the test requirements of the test platform, a controllable pulsating oil flow is excited in the pipeline, and the test bench is provided with a control system, which mainly controls the on-off of the electromagnetic valves of the multi-valve air cannon, the excitation pressure size, and the control mode includes manual control and automatic control two control modes, and the control system needs to have the function of interval time continuous triggering. The manual control design is a jog control system for a single air cannon valve, each manual button corresponds to an air cannon valve, and the air cannon valve corresponding to the button is actuated when the button is jogged; the automatic control design is controlled by a program controller to control the electromagnetic valve of the air cannon valve corresponding to the air flow release, which can control the sequential start until the last air cannon is started, and the automatic stop program can be used to simulate the situation that multiple faults of the transformer occur continuously.

[0053] The process of determining the action ability of the gas relay by the device is as follows:

[0054] The oil inlet end of the gas relay to be measured is connected to the bottom oil outlet through a pipeline and is fastened, and the oil outlet end is connected to the oil pillow 32 through the corrugated pipe 6; the insulating oil is placed into the transient oil flow generating cavity 31, after the oil is filled, the insulating oil flows into the oil pillow 32 along the connecting pipeline and fills the connecting pipeline; the test is started, the compressed air machine is started, the compressed air enters the air cannon 21 internal gas tank through the air cannon 21 air inlet, at this time, the air cannon 21 is in a state of being ready to fire, the electromagnetic valve 212 valve of the corresponding port is started (the number of valves to be fired, simultaneous firing or sequential firing and firing interval time, the excitation pressure size of the electromagnetic valve 212, etc. can be set, which is used to simulate multiple fault phenomena), the compressed air in the gas tank is sprayed out through the discharge pipe 213, under the action of pressure impact, the insulating oil is sprayed out, reaches the action threshold of the gas relay, causes the gas relay to act and send a trip signal, records the time when the gas relay 3 acts, and records the flow rate, pressure, vibration signal and baffle action image in the time period before and after the action.

[0055] In conclusion, the device for measuring action capability of gas relay provided in the utility model can simulate actual faults and simulate the situation that multiple faults of the transformer continuously occur, so that the measurement result of the action capability of the gas relay is more reliable.

[0056] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model belong to the scope of the utility model claims and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. An apparatus for measuring the operating capacity of a gas relay, characterized by comprising: The test bench body, the transient oil flow excitation device, the transient oil flow generation device and the measurement unit; wherein The transient oil flow generation device is arranged on the first side of the test bench body, and the transient oil flow generation device has a transient oil flow generation cavity, the oil outlet end of the transient oil flow generation cavity is connected with the oil inlet end of the gas relay along the horizontal direction, so as to fill the insulating oil and generate the transient oil flow and deliver the transient oil flow to the gas relay; The transient oil flow generation device further comprises an oil pillow, the oil pillow is connected with the oil outlet end of the gas relay, so as to store the insulating oil output through the gas relay; The transient oil flow excitation device is arranged on the second side of the test bench body, and the transient oil flow excitation device is provided with an air gun, the outlet end of the air gun is connected with the inlet end of the transient oil flow generation cavity, so as to convert the air pressure energy into the air jet power and deliver it to the transient oil flow generation cavity, so that the insulating oil in the transient oil flow generation cavity generates the transient oil flow to enter the gas relay; The measurement unit is arranged close to the gas relay, so as to detect the parameters of the gas relay and the action image of the baffle in the gas relay when the transient oil flow impact occurs. The measurement unit comprises an embedded liquid pressure sensor, an external flow rate sensor, a three-way vibration acceleration sensor and a camera; wherein 2. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The inlet end of the gas relay is connected with the transient oil flow generation device through pipeline one, and the embedded liquid pressure sensor is arranged on the pipeline one close to the inlet end of the gas relay, so as to monitor the pressure signal of the pipeline one under the impact of the transient oil flow; The external flow rate sensor is arranged on the pipeline one and located on one side of the embedded liquid pressure sensor, so as to monitor the flow rate signal of the insulating oil in the pipeline one under the impact of the transient oil flow; The three-way vibration acceleration sensor is arranged on the gas relay, so as to monitor the vibration acceleration of the gas relay when the transient oil flow impact occurs; The camera is arranged towards the observation window of the gas relay, so as to record the action image of the baffle. The embedded liquid pressure sensor is a high-frequency response pressure transmitter.

3. The device for measuring the operating capacity of a gas relay according to claim 2, wherein The external flow rate sensor is an ultrasonic flowmeter.

4. The device for measuring the operating capacity of a gas relay according to claim 2, wherein The oil pillow is arranged on the first side of the test bench body, and the oil pillow is connected with the oil outlet end of the gas relay through the corrugated pipe.

5. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The liquid level sensor is arranged in the transient oil flow generation cavity, so as to detect the internal oil surface position in the transient oil flow generation cavity.

6. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The transient oil flow excitation device further comprises an air compressor; wherein 7. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The air outlet end of the air compressor is connected with the air gun, so as to convert the air pressure energy into the air jet power and deliver it to the air gun. The air gun comprises an air gun body, a controller, a plurality of electromagnetic valves and a plurality of discharge pipes; wherein 8. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The air gun body has an air tank inside, which is used to receive and store the compressed air entering from the air inlet; ​ A plurality of said discharge pipes are arranged at the outlet end of said air cannon body and correspondingly arranged with each said electromagnetic valve; Each said electromagnetic valve is connected with said air cannon body for controlling the release of compressed air from said air tank; Said controller is connected with each said electromagnetic valve for controlling the corresponding electromagnetic valve to act to jet the compressed air in said air tank out through the corresponding said discharge pipe.

9. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The test bench body comprises a first movable workbench and a second movable workbench; wherein, The first movable workbench and the second movable workbench are arranged side by side and spaced apart, the transient oil flow generating device, the measuring unit and the to-be-tested gas relay are placed on the first movable workbench, and the transient oil flow excitation device is arranged on the second movable workbench.

10. The device for measuring the operating capacity of a gas relay according to claim 1, wherein The bottom of the first movable workbench and the second movable workbench is respectively provided with a plurality of rollers, and each roller is provided with a brake.

Images