CN106680707B - Method, device and system for checking heavy gas action setting value of double-float gas relay - Google Patents
Method, device and system for checking heavy gas action setting value of double-float gas relay Download PDFInfo
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Abstract
The embodiment of the application provides a method, a device and a system for checking a heavy gas action setting value of a double-float gas relay, wherein the method comprises the steps of establishing a three-dimensional finite element model of the double-float gas relay, wherein the three-dimensional finite element model comprises a double-float gas relay model and an oil flow model, and generating a fluid calculation model; simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation to obtain a corresponding relation of initial flow state heavy gas actions of the oil flow model and a simulation action value; obtaining an experimental action value of the double-floater gas relay, wherein the experimental action value is obtained through an oil flow impact experiment; according to the simulation action value and the experimental action value, obtaining an action setting value of the double-float gas relay; and correcting the action setting value of the double-float gas relay according to the corresponding relation and the preset action limit value of the heavy gas of the double-float gas relay, so that the error of checking the action setting value of the heavy gas of the double-float gas relay is obviously reduced.
Description
Technical Field
The application relates to the technical field of safety protection of power systems, in particular to a method, a device and a system for checking a heavy gas action setting value of a double-float gas relay.
Background
In an electrical power system, a gas relay is a main protection device inside a transformer, and is usually arranged in a pipeline between a tank and an oil tank of the transformer. The gas relay mainly comprises an opening cup baffle type gas relay, a single-float gas relay, a double-float gas relay and the like. With the increasing number of newly built substations, the application of the double-float gas relay in the power system is becoming wider and wider. The sensitivity of the gas relay depends on the action setting value, and a double-float gas relay with only a heavy gas protection function is generally applied in China, so that the verification of the heavy gas action setting value of the double-float gas relay has an important influence on the reliability of the double-float gas relay.
Currently, the calibration of the heavy gas action setting value of the double-float gas relay is usually performed by using a gas relay calibration table in a traditional laboratory. Through oil flow impact experiments, measuring the flow velocity of oil flow in a pipeline, collecting the flow velocity of oil flow when the double-float gas relay acts, obtaining an experimental action value of heavy gas of the double-float gas relay, comparing the experimental action value with a preset action limit value, comparing whether the two data are consistent, and if the preset action limit value is inconsistent with the experimental action value, adjusting the setting value of the heavy gas action of the double-float gas relay according to the action limit value and the collected action experimental value.
However, in an actual experiment, the experimental action value is not always completely equal to the actual action value of heavy gas of the double-float gas relay, and a certain error exists between the two values. According to the existing calibration method for the heavy gas action setting value of the double-float gas relay, the experimental action value of the double-float gas relay is measured only through a gas relay calibration table in a traditional laboratory, the action setting value is calibrated according to the preset action limit value and the experimental action value, and a final calibration result can generate larger calibration errors.
Disclosure of Invention
The application provides a method, a device and a system for verifying a heavy gas action setting value of a double-float gas relay, which are used for solving the problem that the existing method for verifying the heavy gas action setting value of the double-float gas relay can generate larger correction errors.
In a first aspect, the application provides a method for checking a heavy gas action setting value of a double-float gas relay, which comprises the following steps:
establishing a three-dimensional finite element model of a double-float gas relay, wherein the three-dimensional finite element model comprises a double-float gas relay model and an oil flow model positioned in a cavity of the double-float gas relay model;
generating a fluid calculation model according to the three-dimensional finite element model;
simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and heavy gas actions of the double-float gas relay model and simulation action values of the double-float gas relay;
acquiring an experimental action value of the double-floater gas relay, wherein the experimental action value is obtained through an oil flow impact experiment;
calculating a difference value between the simulated action value and the experimental action value;
judging whether the difference value is smaller than a preset threshold value or not;
if the difference value is smaller than the preset threshold value, outputting the simulation action value or the experimental action value as an action setting value of the double-float gas relay;
and correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
With reference to the first aspect, in a first possible implementation manner of the first aspect, simulating different initial flow states of the oil flow model, performing fluid simulation numerical calculation on the fluid calculation model, and obtaining a corresponding relationship between the initial flow states of the oil flow model and the heavy gas action of the dual-float gas relay model includes:
simulating different initial oil flow rates and different initial oil flow temperatures of the oil flow model;
under the different initial oil flow speeds and the different initial oil flow temperatures, performing fluid simulation analysis on a temperature field and a pressure field of the fluid calculation model to obtain temperature distribution information and pressure distribution information;
and acquiring the corresponding relation between the different initial oil flow speeds and the different initial oil flow temperatures and the heavy gas action of the double-float gas relay model according to the temperature distribution information and the pressure distribution information.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, performing fluid simulation analysis on a temperature field and a pressure field of the fluid computing model, obtaining temperature distribution information and pressure distribution information includes:
splitting the fluid computing model by utilizing a three-dimensional hexagonal grid;
and according to the subdivision result, the temperature distribution information and the pressure distribution information are calculated in a simulation mode.
In a second aspect, the present application further provides a device for checking a heavy gas action setting value of a dual-float gas relay, where the device includes:
the modeling module is used for building a three-dimensional finite element model of the double-floater gas relay, and the three-dimensional finite element model comprises a double-floater gas relay model and an oil flow model positioned in a cavity of the double-floater gas relay model;
the fluid computing model generating module is used for generating a fluid computing model according to the three-dimensional finite element model;
the simulation module is used for simulating different initial flow states of the oil flow model, performing fluid simulation numerical calculation on the fluid calculation model, and obtaining a corresponding relation between the initial flow states of the oil flow model and the heavy gas action of the double-float gas relay model and a simulation action value of the double-float gas relay;
the experimental action value acquisition module is used for acquiring the experimental action value of the double-floater gas relay, and the experimental action value is obtained through an oil flow impact experiment;
the calculation module is used for calculating the difference value between the simulation action value and the experimental action value;
the judging module is used for judging whether the difference value is smaller than a preset threshold value or not;
the action setting value output module is used for outputting the simulation action value or the experimental action value as the action setting value of the double-float gas relay, wherein the difference value is smaller than the preset threshold value;
and the action setting value correction module is used for correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the analog simulation module includes:
the simulation module is used for simulating different initial oil flow speeds and different initial oil flow temperatures of the oil flow model;
the simulation analysis module is used for carrying out fluid simulation analysis on the temperature field and the pressure field of the fluid calculation model under the conditions of different initial oil flow speeds and different initial oil flow temperatures to acquire temperature distribution information and pressure distribution information;
and the acquisition module is used for acquiring the corresponding relation between the different initial oil flow speeds and the different initial oil flow temperatures and the heavy gas action of the double-float gas relay model according to the temperature distribution information and the pressure distribution information.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the simulation analysis module includes:
the subdivision module is used for subdividing the fluid calculation model by utilizing a three-dimensional hexagonal grid;
and the simulation calculation module is used for calculating the temperature distribution information and the pressure distribution information in a simulation manner according to the subdivision result.
In a third aspect, the present application further provides a system for checking a heavy gas action setting value of a double-float gas relay, where the system includes: the device comprises an experimental device and a simulation analysis device connected with the experimental device; the experimental device comprises an experimental unit, a signal transmission unit and a control console; the experimental unit comprises a transformer, a pump body and an oil flow pipeline connected between the transformer and the pump body, wherein a double-floater gas relay is arranged in the oil flow pipeline; the signal transmission unit comprises a temperature sensor, a pressure sensor and a flow sensor; the input end of the temperature sensor is connected with the transformer and the oil flow pipeline respectively; the input end of the pressure sensor is connected with the oil flow pipeline; the input end of the flow sensor is connected with the oil flow pipeline; the output ends of the temperature sensor, the pressure sensor and the flow sensor are connected with the control console, and the control console is connected with the simulation analysis device;
the experimental device is used for conducting oil flow impact experiments on the double-floater gas relay and obtaining experimental action values of the double-floater gas relay;
the simulation analysis device is used for establishing a three-dimensional finite element model of the double-floater gas relay, and the three-dimensional finite element model comprises a double-floater gas relay model and an oil flow model positioned in a cavity of the double-floater gas relay model; generating a fluid calculation model according to the three-dimensional finite element model; simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and heavy gas actions of the double-float gas relay model and simulation action values of the double-float gas relay; acquiring an experimental action value of the double-floater gas relay, wherein the experimental action value is obtained through an oil flow impact experiment; calculating a difference value between the simulated action value and the experimental action value; judging whether the difference value is smaller than a preset threshold value or not; if the difference value is smaller than the preset threshold value, outputting the simulation action value or the experimental action value as an action setting value of the double-float gas relay; and correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
According to the technical scheme, the method, the device and the system for verifying the heavy gas action setting value of the double-float gas relay are provided by the embodiment of the application, and the three-dimensional finite element model of the double-float gas relay is established, and comprises a double-float gas relay model and an oil flow model positioned in a cavity of the double-float gas relay model; generating a fluid calculation model according to the three-dimensional finite element model; simulating different initial flow states of the oil flow model at the inlet of the double-floater gas relay model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and heavy gas actions of the double-floater gas relay model and simulation action values of the double-floater gas relay; performing an oil flow impact experiment on the double-floater gas relay to obtain an experimental action value of the double-floater gas relay; according to the simulation action value and the experimental action value, obtaining an action setting value of the double-float gas relay; according to the corresponding relation and the preset action limit value of the heavy gas of the double-float gas relay, the action setting value of the double-float gas relay is corrected, and according to the simulation action value and the experimental action value, the action setting value of the double-float gas relay is obtained, so that the obtained action setting value is more approximate to the action actual value of the heavy gas of the double-float gas relay, and then according to the corresponding relation and the preset action limit value of the heavy gas of the double-float gas relay, the action setting value of the double-float gas relay is corrected, and the error of checking the action setting value of the heavy gas of the double-float gas relay is obviously reduced.
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In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a method for checking a heavy gas action setting value of a double-float gas relay according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating the step S103 in fig. 1;
FIG. 3 is a schematic diagram illustrating the step S1032 in FIG. 2;
FIG. 4 is a block diagram of a device for checking the setting value of heavy gas action of a double-float gas relay according to an embodiment of the present application;
FIG. 5 is a block diagram of the simulation module of FIG. 4;
FIG. 6 is a block diagram of the simulation analysis module of FIG. 5;
FIG. 7 is a block diagram of a system for checking the setting value of the heavy gas action of a double-float gas relay according to an embodiment of the present application;
fig. 8 is a block diagram of the experimental setup in fig. 7.
Detailed Description
Referring to fig. 1, a method for checking a heavy gas action setting value of a dual-float gas relay according to an embodiment of the present application includes the following steps:
and step S101, establishing a three-dimensional finite element model of the double-floater gas relay, wherein the three-dimensional finite element model comprises a double-floater gas relay model and an oil flow model positioned in a cavity of the double-floater gas relay model.
In this embodiment, taking BF type double float gas relay manufactured by EMB corporation of germany as an example, 1 is established according to the actual structural parameters of the double float gas relay: 1, and the establishment of the three-dimensional finite element model can be realized by means of a computer through the existing three-dimensional finite element modeling software. The built three-dimensional finite element model comprises a double-floater gas relay model and an oil flow model, wherein the oil flow model is positioned at a cavity part of the double-floater gas relay model so as to simulate, calculate and analyze a flow field in the double-floater gas relay model.
And step S102, generating a fluid calculation model according to the three-dimensional finite element model.
And generating a fluid calculation model through the established three-dimensional finite element model, wherein the flow field of the double-float gas relay is calculated as a three-dimensional calculation fluid problem, and the calculation area is mainly the part of the oil flow actually flowing through the cavity of the double-float gas relay.
Wherein, the control equation of the fluid calculation model is as follows:
continuity equation:
momentum equation:
in the formula: ρ is the density of transformer oil, V is the vector form of the oil flow velocity, i.e. v= (V) x ,v y ,v z ) V is the divergence of the oil flow velocity, i.eF is the mass force acting on the liquid oil flow element, < >>For inertial forces acting on the fluid flow microelements, i.e. stress tensor +.> I.e. deformation rate tensor, /)>Referred to as deformation tensor, describes the deformation condition of the liquid oil flow microelements.
Wherein the control equation and boundary conditions for the three-dimensional fluid computation of the model may be as follows:
under the condition of a speed inlet, a specific control equation is expressed as follows in Cartesian coordinates by adopting a k-epsilon turbulence model method:
continuity equation of incompressible fluid:
incompressible turbulent motion equation:
standard k- ε equation:
equation of turbulence energy k:
equation for dissipation ratio ε:
wherein: ρ is the density of the transformer oil, p is the pressure of the transformer oil micro-clusters, μ is the dynamic viscosity of the oil, μ t K is turbulence energy and epsilon is dissipation rate. Other parameters C μ ＝0.09，C c1 ＝1.44，C c2 ＝1.92，σ k ＝1.0，σ ε ＝1.3。
The continuity equation is in tensor form +.>x i As the coordinate component x i ＝(x,y,z)，u i For the velocity component u of the oil flow i ＝(v x ,v y ,v z )，v i Similarly, μ is the dynamic viscosity of the oil, μ i As a viscosity component, u i u j Is velocity tensor>ρf i In the form of force component of unit volume of liquid oil trace element body, ρf i ＝(ρf x ,ρf y ,ρf z )。
And step S103, simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and the heavy gas action of the double-float gas relay model and a simulation action value of the double-float gas relay.
The corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model can be used for adjusting the action setting value later, and the corresponding relation is used as a reference for adjusting the action setting value of the double-float gas relay, so that the accuracy of the heavy gas action setting value verification of the double-float gas relay is improved.
And step S104, acquiring an experimental action value of the double-floater gas relay, wherein the experimental action value is obtained through an oil flow impact experiment.
The oil flow impact experiment can be carried out on the double-floater gas relay through the experimental device so as to measure the experimental action value of the double-floater gas relay. In the oil flow impact experiment, short-circuit current can be generated through a transformer winding, transformer faults are caused, so that the transformer oil flow is caused to surge by the fault current, the oil flow impacts the double-float gas relay, heavy gas action of the double-float gas relay is caused, and then an experimental action value of the heavy gas action of the double-float gas relay is tested.
Step 105, calculating a difference between the simulated motion value and the experimental motion value.
And S106, judging whether the difference value is smaller than a preset threshold value.
And step S107, if the difference value is smaller than the preset threshold value, outputting the simulation action value or the experimental action value as an action setting value of the double-float gas relay.
Because the experimental action value of the double-float gas relay obtained by the oil flow impact experiment and the simulated action value of the double-float gas relay obtained by calculating the fluid simulation value are not actual action values of heavy gas actions of the double-float gas relay, and certain deviation can exist between the experimental action value and the simulated action value, the difference value between the simulated action value and the experimental action value is calculated, and the difference value is compared with a preset threshold value to judge whether the difference value is smaller than the preset threshold value, when the difference value is smaller than the preset threshold value, the experimental action value is relatively close to the simulated action value, and the simulated action value or the experimental action value can be used as the action setting value of the double-float gas relay.
If the difference value is larger than or equal to the preset threshold value, the fact that a larger deviation exists between the experimental action value and the simulation action value is indicated, and if the simulation action value or the experimental action value is used as the action setting value of the double-float gas relay, a larger error can be generated.
At this time, the process of step S103 needs to be repeatedly executed, that is, the oil flow impact experiment is repeatedly performed on the same double-float gas relay to obtain an experimental action value; and repeatedly performing fluid simulation numerical calculation on the fluid calculation model to obtain a simulation action value of the double-float gas relay until the difference value between the experimental action value and the simulation action value is smaller than a preset threshold value, namely the two values reach similar or even equal results, and then outputting the simulation action value or the experimental action value at the moment as an action setting value of the double-float gas relay.
According to the simulation action value and the experimental action value, the action setting value of the double-float gas relay is obtained, so that the obtained action setting value is more approximate to the action actual value of heavy gas of the double-float gas relay, and the accuracy of the action setting value is improved.
And S108, correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
The preset action limit value is a target value to be adjusted for the action setting value, and the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model can be used as a reference for adjusting the action setting value of the double-float gas relay.
As shown in fig. 2, in another embodiment of the present application, in step S103 of fig. 1, the step of simulating different initial flow states of the oil flow model, performing fluid simulation numerical calculation on the fluid calculation model, and obtaining a correspondence between the initial flow states of the oil flow model and the heavy gas action of the dual-float gas relay model may include the following steps:
step S1031, simulating different initial oil flow rates and different initial oil flow temperatures of the oil flow model.
And S1032, performing fluid simulation analysis on the temperature field and the pressure field of the fluid calculation model under the conditions of different initial oil flow speeds and different initial oil flow temperatures to acquire temperature distribution information and pressure distribution information.
The simulation transformer is in fault, short-circuit current is generated to cause oil flow to surge, the double-float gas relay is impacted, and fluid simulation analysis is carried out on a temperature field and a pressure field in the double-float gas relay according to a fluid calculation model.
And step S1033, obtaining the corresponding relation between the different initial oil flow speeds and the different initial oil flow temperatures and the heavy gas action of the double-float gas relay model according to the temperature distribution information and the pressure distribution information.
The initial oil flow speed and the initial oil flow temperature of the oil flow are main factors influencing the heavy gas action of the double-float gas relay model, so that the corresponding relation between different initial oil flow speeds and different initial oil flow temperatures and the heavy gas action of the double-float gas relay model is used as a reference for adjusting the action setting value of the double-float gas relay, and the reliability of verification can be improved.
In addition, the transformer oil flow surge caused by the pressure of the gas in the pipeline between the oil storage cabinet and the oil tank of the transformer can be obtained, the influence on the heavy gas action of the double-float gas relay is also obtained, and the corresponding relation between the pressure of the gas and the heavy gas action of the double-float gas relay is used as a reference for adjusting the action setting value of the double-float gas relay.
As shown in fig. 3, in still another embodiment of the present application, step S1032 of fig. 2 may include the steps of:
step S1041, splitting the fluid computing model by utilizing a three-dimensional hexagonal grid.
And step S1042, according to the subdivision result, calculating the temperature distribution information and the pressure distribution information in a simulation way.
Considering that the quality of grid control is a key factor for improving the accuracy of a calculation result in the fluid numerical calculation of the flow field of the double-floater gas relay; therefore, according to the structural body points of the double-floater gas relay, the three-dimensional hexagonal grid is adopted to split the fluid calculation model; the oil flow position hidden behind the double-floater gas relay baffle plate is subjected to grid encryption so as to ensure the flow field distribution calculation accuracy of the action baffle plate.
It can be seen from the above that, according to the method for verifying the heavy gas action setting value of the double-float gas relay provided by the embodiment of the application, through combination of simulation analysis and experiment, the action setting value of the double-float gas relay is obtained according to the simulation action value and the experiment action value, so that the obtained action setting value is closer to the actual action value of the heavy gas of the double-float gas relay, and then the action setting value of the double-float gas relay is corrected according to the corresponding relation and the preset action limit value of the heavy gas of the double-float gas relay, thereby significantly reducing the error of verification of the heavy gas action setting value of the double-float gas relay.
Fig. 4 is a diagram of a calibration device for a heavy gas action setting value of a double-float gas relay, which comprises:
the modeling module 11 is used for building a three-dimensional finite element model of the double-floater gas relay, and the three-dimensional finite element model comprises the double-floater gas relay model and an oil flow model positioned in a cavity of the double-floater gas relay model.
A fluid computing model generation module 12 for generating a fluid computing model from the three-dimensional finite element model.
The simulation module 13 is configured to simulate different initial flow states of the oil flow model, perform fluid simulation numerical calculation on the fluid calculation model, and obtain a corresponding relationship between the initial flow states of the oil flow model and the heavy gas action of the dual-float gas relay model, and a simulation action value of the dual-float gas relay.
The experimental action value obtaining module 14 is configured to obtain an experimental action value of the dual-float gas relay, where the experimental action value is obtained through an oil flow impact experiment.
And the calculating module 15 is used for calculating the difference value between the simulation action value and the experimental action value.
A determining module 16, configured to determine whether the difference is smaller than a preset threshold.
And the action setting value output module 17 is configured to output the simulated action value or the experimental action value as the action setting value of the double-float gas relay, where the difference is smaller than the preset threshold.
And the action setting value correction module 18 is used for correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
As shown in fig. 5, in another embodiment of the present application, the analog simulation module 13 in fig. 4 may include:
the simulation module 101 is configured to simulate different initial oil flow rates and different initial oil flow temperatures of the oil flow model.
And the simulation analysis module 102 is used for performing fluid simulation analysis on the temperature field and the pressure field of the fluid calculation model under the conditions of different initial oil flow speeds and different initial oil flow temperatures to acquire temperature distribution information and pressure distribution information.
And the obtaining module 103 is configured to obtain the corresponding relationship between the different initial oil flow speeds and the different initial oil flow temperatures and the heavy gas action of the dual-float gas relay model according to the temperature distribution information and the pressure distribution information.
As shown in fig. 6, in another embodiment of the present application, the simulation analysis module 102 in fig. 5 may include:
a subdivision module 201, configured to subdivide the fluid computing model with a three-dimensional hexagonal mesh.
And the simulation calculation module 202 is used for calculating the temperature distribution information and the pressure distribution information in a simulation mode according to the subdivision result.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
As can be seen from the above, according to the device for verifying the heavy gas action setting value of the double-float gas relay provided by the embodiment of the application, through combination of simulation analysis and experiment, the action setting value of the double-float gas relay is obtained according to the simulation action value and the experiment action value, so that the obtained action setting value is closer to the actual action value of the heavy gas of the double-float gas relay, and then the action setting value of the double-float gas relay is corrected according to the corresponding relation and the preset action limit value of the heavy gas of the double-float gas relay, so that the error of verification of the heavy gas action setting value of the double-float gas relay is remarkably reduced.
Fig. 7 is a diagram of a calibration system for a heavy gas action setting value of a double-float gas relay, which includes: an experimental device 2 and a simulation analysis device 1 connected with the experimental device 2. The experimental device 2 is used for testing experimental action values of the double-floater gas relay, and the simulation analysis device 1 is used for obtaining simulation action values of the double-floater gas relay through simulation analysis.
As shown in fig. 8, the experimental device 2 includes an experimental unit, a signal transmission unit, and a console 28. The experimental unit comprises a transformer 21, a pump body 23 and an oil flow pipeline 20 connected between the transformer 21 and the pump body 23, wherein the oil flow pipeline 20 is internally provided with a double-floater gas relay 22 so as to perform oil flow impact experiments on the double-floater gas relay 22 and obtain experimental action values of the double-floater gas relay 22. The pump body 23 is used for providing corresponding transformer oil for oil flow impact experiments. The control console 28 can also be connected with an over-current protector 27, and the over-current protector 27 is used for cutting off the power supply of the control console 28 when a serious short circuit occurs so as to ensure the safety of experiments.
The signal transmission unit comprises a temperature sensor 24, a pressure sensor 25 and a flow sensor 26. The input of the temperature sensor 24 is connected to the transformer 25 and the oil flow line 20, respectively. The input of the pressure sensor 25 is connected to the oil flow line 20. The input of the flow sensor 26 is connected to the oil flow conduit 20. The outputs of the temperature sensor 24, the pressure sensor 25 and the flow sensor 26 are connected to the console 28, and the console 28 is connected to the simulation analysis apparatus 1. The console 28 may be implemented using an existing gas relay calibration stand.
When the oil flow impact experiment is performed on the double-float gas relay 22, the temperature sensor 24, the pressure sensor 25 and the flow sensor 26 can respectively transmit the real-time changes of the temperature, the pressure and the flow in the double-float gas relay 22 to the console 28. The console 28 may also be connected to a display terminal 29, through which display terminal 29 real-time changes in temperature, pressure, flow in the dual float gas relay 22 are displayed.
The simulation analysis device 1 is used for establishing a three-dimensional finite element model of the double-float gas relay 22, wherein the three-dimensional finite element model comprises a double-float gas relay model and an oil flow model positioned in a cavity of the double-float gas relay model; generating a fluid calculation model according to the three-dimensional finite element model; simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and heavy gas actions of the double-float gas relay model and simulation action values of the double-float gas relay 22; acquiring an experimental action value of the double-float gas relay 22, wherein the experimental action value is obtained through an oil flow impact experiment; calculating a difference value between the simulated action value and the experimental action value; judging whether the difference value is smaller than a preset threshold value or not; if the difference value is smaller than the preset threshold value, outputting the simulation action value or the experimental action value as an action setting value of the double-float gas relay; and correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
In a specific implementation, the application further provides a computer storage medium, wherein the computer storage medium can store a program, and the program can comprise part or all of the steps in each embodiment of the method for checking the heavy gas action setting value of the double-float gas relay. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a random-access memory (random access memory, RAM), or the like.
It will be apparent to those skilled in the art that the techniques of embodiments of the present application may be implemented in software plus a necessary general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present application may be embodied in essence or what contributes to the prior art in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present application.
The same or similar parts between the various embodiments in this specification are referred to each other. In particular, for the embodiment of the device for checking the setting value of the heavy gas action of the double-float gas relay, the description is relatively simple because the device is basically similar to the embodiment of the method, and the relevant points are referred to the description in the embodiment of the method.
The embodiments of the present application described above do not limit the scope of the present application.
Claims (5)
1. The method for checking the heavy gas action setting value of the double-floater gas relay is characterized by comprising the following steps of:
establishing a three-dimensional finite element model of a double-float gas relay, wherein the three-dimensional finite element model comprises a double-float gas relay model and an oil flow model positioned in a cavity of the double-float gas relay model;
generating a fluid calculation model according to the three-dimensional finite element model;
simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and heavy gas actions of the double-float gas relay model and simulation action values of the double-float gas relay;
the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-floater gas relay model comprises the following steps:
simulating different initial oil flow rates and different initial oil flow temperatures of the oil flow model;
under the different initial oil flow speeds and the different initial oil flow temperatures, performing fluid simulation analysis on a temperature field and a pressure field of the fluid calculation model to obtain temperature distribution information and pressure distribution information;
acquiring the corresponding relation between different initial oil flow speeds and different initial oil flow temperatures and the heavy gas action of the double-float gas relay model according to the temperature distribution information and the pressure distribution information;
acquiring an experimental action value of the double-floater gas relay, wherein the experimental action value is obtained through an oil flow impact experiment;
calculating a difference value between the simulated action value and the experimental action value;
judging whether the difference value is smaller than a preset threshold value or not;
if the difference value is smaller than the preset threshold value, outputting the simulation action value or the experimental action value as an action setting value of the double-float gas relay;
and correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
2. The method of claim 1, wherein performing fluid simulation analysis on the temperature and pressure fields of the fluid computing model to obtain temperature and pressure distribution information comprises:
splitting the fluid computing model by utilizing a three-dimensional hexagonal grid;
and according to the subdivision result, the temperature distribution information and the pressure distribution information are calculated in a simulation mode.
3. The utility model provides a heavy gas action setting value calibration equipment of two float gas relays, its characterized in that, the device includes:
the modeling module is used for building a three-dimensional finite element model of the double-floater gas relay, and the three-dimensional finite element model comprises a double-floater gas relay model and an oil flow model positioned in a cavity of the double-floater gas relay model;
the fluid computing model generating module is used for generating a fluid computing model according to the three-dimensional finite element model;
the simulation module is used for simulating different initial flow states of the oil flow model, performing fluid simulation numerical calculation on the fluid calculation model, and obtaining a corresponding relation between the initial flow states of the oil flow model and the heavy gas action of the double-float gas relay model and a simulation action value of the double-float gas relay;
the simulation module comprises:
the simulation module is used for simulating different initial oil flow speeds and different initial oil flow temperatures of the oil flow model;
the simulation analysis module is used for carrying out fluid simulation analysis on the temperature field and the pressure field of the fluid calculation model under the conditions of different initial oil flow speeds and different initial oil flow temperatures to acquire temperature distribution information and pressure distribution information;
the acquisition module is used for acquiring the corresponding relation between the different initial oil flow speeds and the different initial oil flow temperatures and the heavy gas action of the double-float gas relay model according to the temperature distribution information and the pressure distribution information;
the experimental action value acquisition module is used for acquiring the experimental action value of the double-floater gas relay, and the experimental action value is obtained through an oil flow impact experiment;
the calculation module is used for calculating the difference value between the simulation action value and the experimental action value;
the judging module is used for judging whether the difference value is smaller than a preset threshold value or not;
the action setting value output module is used for outputting the simulation action value or the experimental action value as the action setting value of the double-float gas relay, wherein the difference value is smaller than the preset threshold value;
and the action setting value correction module is used for correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
4. The apparatus of claim 3, wherein the simulation analysis module comprises:
the subdivision module is used for subdividing the fluid calculation model by utilizing a three-dimensional hexagonal grid;
and the simulation calculation module is used for calculating the temperature distribution information and the pressure distribution information in a simulation manner according to the subdivision result.
5. A dual float gas relay heavy gas action setting value verification system, the system comprising: the device comprises an experimental device and a simulation analysis device connected with the experimental device; the experimental device comprises an experimental unit, a signal transmission unit and a control console; the experimental unit comprises a transformer, a pump body and an oil flow pipeline connected between the transformer and the pump body, wherein a double-floater gas relay is arranged in the oil flow pipeline; the signal transmission unit comprises a temperature sensor, a pressure sensor and a flow sensor; the input end of the temperature sensor is connected with the transformer and the oil flow pipeline respectively; the input end of the pressure sensor is connected with the oil flow pipeline; the input end of the flow sensor is connected with the oil flow pipeline; the output ends of the temperature sensor, the pressure sensor and the flow sensor are connected with the control console, and the control console is connected with the simulation analysis device;
the experimental device is used for conducting oil flow impact experiments on the double-floater gas relay and obtaining experimental action values of the double-floater gas relay;
the simulation analysis device is used for establishing a three-dimensional finite element model of the double-floater gas relay, and the three-dimensional finite element model comprises a double-floater gas relay model and an oil flow model positioned in a cavity of the double-floater gas relay model; generating a fluid calculation model according to the three-dimensional finite element model; simulating different initial flow states of the oil flow model, and performing fluid simulation numerical calculation on the fluid calculation model to obtain a corresponding relation between the initial flow states of the oil flow model and heavy gas actions of the double-float gas relay model and simulation action values of the double-float gas relay; acquiring an experimental action value of the double-floater gas relay, wherein the experimental action value is obtained through an oil flow impact experiment; calculating a difference value between the simulated action value and the experimental action value; judging whether the difference value is smaller than a preset threshold value or not; if the difference value is smaller than the preset threshold value, outputting the simulation action value or the experimental action value as an action setting value of the double-float gas relay; and correcting the action setting value according to the corresponding relation between the initial flow state of the oil flow model and the heavy gas action of the double-float gas relay model and the preset action limit value of the heavy gas of the double-float gas relay.
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