CN108052737A - A kind of motion simulation method for constraint valve block in gas circuit breaker - Google Patents
A kind of motion simulation method for constraint valve block in gas circuit breaker Download PDFInfo
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Abstract
The present invention discloses a kind of motion simulation method for constraint valve block in gas circuit breaker, determines the fluid in arc-extinguishing chamber of circuit breaker space and solid area and fetters opening and the closed position of valve block；Circuit breaker thaumatropy is the computation of the gas flow field model by the modeling of arc-chutes and valve block；The subdivision that grid is carried out to arc-extinguishing chamber of circuit breaker and valve block model is handled, and matches the relation between the position of the switch of valve block and mesh width, establishes airflow field emulation equation group；By the operating criterion P of valve blockFWith the action threshold value ± δ % of valve block, simultaneous solution in the gentle flow field simulation equation group of computation model is imported；The dynamic simulation of airflow field is carried out according to simultaneous solution, and monitors valve block two sides stressing conditions in real time, according to operating criterion PFThe action trend of valve block is determined with action threshold value ± δ %, with reference to sliding and Dynamic mesh, realizes the continuity movement simulation of constraint valve plate movement process.Simulation accuracy of the present invention is high, versatile, more effective to valve plate movement simulation.
Description
Technical Field
The invention relates to motion simulation of a valve plate of a gas circuit breaker, in particular to a motion simulation method for a constraint valve plate in the gas circuit breaker, which is particularly suitable for motion simulation of the valve plate with a spring.
Background
With the development of computer technology and numerical calculation methods, simulation of the airflow field has become an important method and means for assisting the structural design of high-voltage circuit breaker products. From the calculation of the no-load cold airflow field to the simulation of the on-off arc hot airflow field, researchers at home and abroad carry out a great deal of research work.
In China, the Wang Qin professor and collaborators thereof develop the research of a double-nozzle gas flow field and an electric arc thermal boundary area and calculate the distribution of a two-dimensional gas flow field in an arc extinguishing chamber of the circuit breaker. SF is carried out on college shiYing professor and collaborators thereof 6 And the mutual relation between the operating mechanism of the pneumatic circuit breaker and the arc extinguishing chamber is analyzed by calculating the recovery characteristic of the no-load medium. Output characteristics of the coupled airflow field, electric field and operating mechanism are utilized by Wangzhi et al to research 252kV high-voltage SF 6 And the medium recovery characteristic of the breaker under no-load opening and closing. Forest et al have calculated the airflow field of the nozzle portion in the arc chamber of the intelligent circuit breaker by using a regional expansion method in which computational fluid dynamics software is combined with self-programming.
In foreign countries, J C Verite and the like adopt a finite difference method to solve an airflow field, take the influence of Laplace force on high-speed airflow into consideration, and obtain the speed, mach number and temperature distribution under the rotary arc breaker structure. The J D Yan et al perform numerical simulation on the self-expansion type breaker airflow field and study the influence of the nozzle structure on the airflow cooling process before the zero crossing of the arc. R P sheets et al propose a method to predict the thermal opening capability of a circuit breaker using the arc conductance 200ns before the current zero crossing. Y Tanaka et al for SF 6 The arc plasma chemical non-equilibrium model is researched, and the transient change rule of the airflow field, the temperature field and the chemical particle type is analyzed.
In summary, in the aspect of research on the airflow field, researchers in various countries focus on the arc model, the gas physical property parameters in the zero-crossing stage, and the optimization work of the nozzle structure and the air chamber in the arc extinguish chamber, and there is little research on the valve plate in the arc extinguish chamber, and no description on a simulation method of a moving valve plate exists. However, for a product, the design of the valve plate is an essential link, and whether the motion process of the valve plate under the action of the airflow field can be effectively simulated is directly related to the pressure building, pressure relief and arc extinguishing processes in the air chamber.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the motion simulation method for the bound valve plate in the gas circuit breaker, which has high simulation precision and strong universality and is more effective in valve plate motion simulation.
The invention is realized by the following technical scheme:
a motion simulation method for a trap valve plate in a gas circuit breaker includes the following steps:
step 1, determining fluid and solid areas in the arc extinguish chamber space of the gas circuit breaker and opening and closing positions of a binding valve plate according to structures of the arc extinguish chamber and the binding valve plate of the gas circuit breaker; modeling of an arc extinguish chamber and a valve plate is carried out by using grid pretreatment software, and a circuit breaker product structure is converted into an airflow field calculation model;
step 2, mesh subdivision processing is carried out on the arc extinguish chamber of the circuit breaker and the valve block model, the relation between the switch position of the valve block and the width of the mesh is matched, and an airflow field simulation equation set is established;
step 3, judging the action of the valve plate by a criterion P F And the action threshold value +/-delta% of the valve plate, introducing the valve plate and the action threshold value +/-delta% into a calculation model and an air flow field simulation equation set, and performing simultaneous solution on the equation set by utilizing computational fluid dynamics software;
step 4, carrying out dynamic simulation on the airflow field according to simultaneous solution of the equation set, monitoring the stress conditions of two side surfaces of the valve plate in real time, and determining the stress conditions according to the action F And determining the action trend of the valve plate according to the action threshold value +/-delta%, and realizing continuous motion simulation of the movement process of the bound valve plate by combining the sliding and moving grid technology.
Preferably, in the step 1, the structure characteristics of the arc extinguish chamber and the binding valve plate of the gas circuit breaker are that the side surface of the binding valve plate is provided with a spring, the binding valve plate is under the binding action generated by the spring force except gravity and frictional resistance, and the valve plate gradually moves under the combined action of the pressure difference of the two side surfaces and the spring force in the process of breaking electric arcs of the circuit breaker.
Preferably, in step 1, when the restriction valve plate is in the open position, the air flow in the air chambers on both sides of the restriction valve plate can circulate, and when the restriction valve plate is in the closed position, the air flow in the air chambers on both sides of the restriction valve plate can not circulate.
Preferably, in step 1, when the grid preprocessing software is used for modeling the arc-extinguishing chamber and the valve plate, parts irrelevant to the calculation of the airflow field or parts with small correlation and negligible correlation are simplified.
Preferably, in step 2, when the relationship between the switching position of the valve plate and the grid width is matched, because the constraint valve plate is opened or closed under the combined action of the airflow and the spring in the process of opening and closing the circuit breaker, the valve plate is regarded as being in a plurality of positions with different degrees of opening or being in a closed position, so that the relationship between the movement speed of the valve plate and the grid width is matched, and the movement distance of the valve plate is ensured to be less than or equal to one grid width in each time step.
Preferably, in step 3, the action criterion P of the valve plate is programmed through C language F And the action threshold value +/-delta% of the valve plate, and introducing the valve plate into a calculation model and an air flow field simulation equation set, wherein delta is an integer of 1-10.
Preferably, in step 3, the action criterion P F As shown in the following formula, a compound represented by,
wherein, F o Force to drive the valve plate open, F c The force that drives the valve plate closed.
Preferably, in step 4, when P is F &At + delta%, the valve plate tends to close; when P is present F &At-delta%, the valveThe sheet tends to open; when the ratio is-delta%<P F &At + delta%, the valve plate does not move.
Further, specifically, if the valve plate tends to open under the combined action of the air pressure and the spring force, the grid at the valve plate is shifted to a certain position in a sliding and moving mode, so that the valve plate is opened to a larger position or a final maximum opening position; on the contrary, if the valve plate tends to close under the combined action of the air pressure and the spring force, the grid at the valve plate shifts a certain position by sliding and moving, so that the valve plate is opened to a smaller or final closed position.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) The simulation precision is high. Compared with the movement characteristics of the existing valve plate, the invention has closer and more accurate treatment on the movement of the valve plate.
(2) The movement is more reasonable. The movement displacement is small and the valve plate acts continuously in each time step by the bound valve plate with the spring. The simulation method adopts the sliding and moving grid technology and combines the action of the airflow field and the spring force to realize the simulation, so that the motion of the valve plate is more reasonable.
(3) The method is suitable for simulating the movement of the valve plate under the condition that the bound valve plate structure exists in different circuit breaker arc extinguishing chambers, and has certain universality.
(4) The invention provides an effective way for valve plate action simulation in on-off simulation, and the time-varying motion simulation of the valve plate can be effectively realized by setting the valve plate action criterion PF and the action threshold, so that the calculation efficiency is improved, and a method foundation is established for the on-off simulation of the gas circuit breaker.
Drawings
FIG. 1 is a diagram of a bound valve model with springs in relation to surrounding air chambers.
Fig. 2 is an enlarged structural view of the bound valve sheet model of fig. 1.
FIG. 3 shows the valve plate P under different switching currents F Graph comparing curve change.
In the figure: the air compressor comprises a pressure release valve 1, a pressure release spring 2, an air return chamber 3 and an air compression chamber 4.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention relates to a motion simulation method for a constraint valve plate in a gas circuit breaker, which provides an action criterion of the valve plate by considering the action relation between gas flow and the valve plate, and realizes time-varying motion simulation of the valve plate by setting an action threshold value of the valve plate and combining a sliding and moving grid technology. According to the structural characteristics of the product, the action threshold value can be finely adjusted, and the movement speed of the valve plate is low in the on-off process of the circuit breaker. Compared with the prior art, the method has the advantages of high accuracy, strong universality and the like for simulating the motion of the valve plate in the arc extinguish chamber of the high-voltage circuit breaker.
The gas circuit breaker is provided with a gas circuit breaker arc extinguish chamber with a bound valve plate structure, the side face of the valve plate is provided with a spring, the valve plate is bound by spring force except gravity and friction resistance, and the valve plate gradually moves under the combined action of the gas pressure difference and the spring force of the two side faces of the valve plate in the process of breaking electric arcs of the circuit breaker. The method comprises the following steps:
1) According to the structural characteristics of the gas circuit breaker arc extinguish chamber and the constraint valve plate, the fluid and solid areas in the space of the circuit breaker arc extinguish chamber and the opening and closing positions of the constraint valve plate are determined. And the modeling of the arc extinguish chamber and the valve plate is carried out by using grid pretreatment software, so that parts irrelevant to the airflow field calculation or having small relevance are simplified, and the conversion from a circuit breaker product structure to an airflow field calculation model is realized.
2) And (4) carrying out mesh subdivision processing on the arc extinguish chamber and the valve block model of the circuit breaker, and matching the relation between the opening and closing positions of the valve block and the mesh width. Because in the on-off process of the circuit breaker, the movement speed of the bound valve plate during opening or closing under the combined action of the airflow and the spring is low, the valve plate can be regarded as being in a plurality of positions with different degrees of opening or being in a closing position, the relationship between the movement speed of the valve plate and the grid width is matched, the movement distance of the valve plate is less than or equal to one grid width in each time step, and the overflow of a movement grid or the grid quality problem is avoided.
3) The action criterion P of the valve plate is programmed through C language F And the action threshold value +/-delta% of the valve plate, see formula (1), introducing into a calculation model and an air flow field simulation equation set, utilizing computational fluid dynamics software to carry out simultaneous solution on the equation set, and finely adjusting the action threshold value of the valve plate between +/-1% and +/-10% according to different arc extinguish chamber structure parameters. The action of the valve plate is determined by the difference in the force applied to the two sides, the spring force being determined by the coefficient of stiffness of the spring and the length of the valve plate compression spring, and the spring force being added to the side of the valve plate adjacent to the spring. Neglecting the action of the gravity and the friction force of the valve plate, or adding the gravity and the friction force to the corresponding side surface of the valve plate. F o Force to drive the valve plate open, F c The force for driving the valve plate to close can be finely adjusted according to the structural characteristics of the product.
4) Dynamic simulation of an airflow field is carried out, stress conditions of two side faces of the valve plate are monitored in real time, continuity of the motion process of the valve plate is restrained according to action trends of the valve plate and by combining sliding and moving grid technologies, namely if the valve plate tends to be opened under combined action of air pressure and spring force, the grid at the valve plate is changed to a certain position in a sliding and moving mode, and the valve plate is opened to a larger or final maximum opening position; on the contrary, if the valve plate tends to close under the combined action of the air pressure and the spring force, the grid at the valve plate shifts a certain position by sliding and moving, so that the valve plate is opened to a smaller or final closing position.
The method comprises the modeling of each gas chamber of the arc extinguish chamber of the gas circuit breaker, the modeling and sliding of the valve plate and the function realization of the moving grid in the aspect of valve plate movement.
The method comprises the steps of simplifying the spring structure, equivalently reducing the spring force, and opening, closing and reciprocating the valve plate under the action of gas pressure and the spring force. For valve plates without springs, which can be considered as a special case when the spring force is extremely small, the motion simulation method of the bound valve plate is also applicable.
Specifically, in the simulation of the gas circuit breaker, the processing of the valve plate movement has a direct influence on the calculation result of the gas flow field. The relationship between the spring loaded trap sheet model and the surrounding air chamber is shown in FIGS. 1 and 2, B c Indicating the closed position of the valve plate, A o Indicating the valve plate open position. Corresponding high-voltage circuit breaker explosion chamber structure, the valve block in the drawing is relief valve 1 to be equipped with pressure release spring 2, be close to A's air chamber and be return-air chamber 3, be close to B's air chamber and be pressure air chamber 4.
FIG. 3 shows P of the relief valve at different switching currents during the arcing process F Graph comparing curve change. The action threshold value of the valve plate in the simulation is +/-3 percent, when P is F &At +3%, the valve plate moves towards the side of the air compressing chamber, namely the valve plate moves from the position A to the position B and tends to be closed; when P is present F &When the valve is opened, the valve moves to the air return chamber side at-3 percent, namely the valve plate moves from the position B to the position A and tends to be opened; when the content is-3%<P F &And +3%, the valve plate does not act. As can be seen from the figure, when the opening current is different, the operation timing of the corresponding relief valve is different. Meanwhile, the pressure relief valve can slightly reciprocate under the influence of the pressure relief spring. Therefore, by using the motion simulation method of the bound valve plate, the influence of the difference of the on-off current and the continuous reciprocating motion process of the pressure relief valve plate under the combined action of the spring and the airflow field can be effectively and clearly described.
Claims (9)
1. A motion simulation method for a bound valve plate in a gas circuit breaker is characterized by comprising the following steps:
step 1, determining fluid and solid areas in the arc extinguish chamber space of the gas circuit breaker and opening and closing positions of a binding valve plate according to structures of the arc extinguish chamber and the binding valve plate of the gas circuit breaker; modeling of an arc extinguish chamber and a valve plate is carried out by utilizing grid pretreatment software, and a circuit breaker product structure is converted into an airflow field calculation model;
step 2, mesh subdivision processing is carried out on the arc extinguish chamber of the circuit breaker and the valve block model, the relation between the switch position of the valve block and the width of the mesh is matched, and an airflow field simulation equation set is established;
step 3, determining the action criterion P of the valve plate F And the action threshold value +/-delta% of the valve plate, introducing the valve plate and the action threshold value +/-delta% into a calculation model and an air flow field simulation equation set, and performing simultaneous solution on the equation set by utilizing computational fluid dynamics software;
step 4, performing dynamic simulation on the airflow field according to simultaneous solution of the equation set, monitoring the stress conditions of two side surfaces of the valve plate in real time, and judging P according to the action F And determining the action trend of the valve plate according to the action threshold value +/-delta%, and realizing continuous motion simulation of the movement process of the bound valve plate by combining the sliding and moving grid technology.
2. The method as claimed in claim 1, wherein the arc extinguishing chamber and the restriction valve plate of the gas circuit breaker in step 1 are structurally characterized in that springs are installed on the side surfaces of the restriction valve plate, the restriction valve plate is subjected to the restriction action generated by the spring force in addition to gravity and frictional resistance, and the valve plate gradually moves under the combined action of the gas pressure difference and the spring force of the two side surfaces of the valve plate in the process of breaking the arc of the circuit breaker.
3. The method as claimed in claim 1, wherein in the step 1, when the trap valve is in the open position, the air flow in the air chambers at both sides of the trap valve is circulated, and when the trap valve is in the closed position, the air flow in the air chambers at both sides of the trap valve is not circulated.
4. The method of claim 1, wherein in the step 1, when the arc-extinguishing chamber and the valve plate are modeled by using grid preprocessing software, components which are irrelevant to the calculation of the gas flow field or have small correlation and can be ignored are simplified.
5. The method of claim 1, wherein in the step 2, when the relationship between the switching position of the valve plate and the grid width is matched, since the valve plate is opened or closed under the combined action of the airflow and the spring in the process of opening and closing the circuit breaker, the valve plate is regarded as being at a plurality of positions with different degrees of opening or being at the closed position, so that the relationship between the movement speed of the valve plate and the grid width is matched, and the movement distance of the valve plate is ensured to be less than or equal to one grid width in each time step.
6. The method as claimed in claim 1, wherein in the step 3, the operation criterion P of the valve plate is programmed by C language F And the action threshold value +/-delta% of the valve plate, and introducing the valve plate into a calculation model and an air flow field simulation equation set, wherein delta is an integer of 1-10.
7. The method as claimed in claim 1, wherein the operation criterion P is determined in step 3 F As shown in the following formula,
wherein, F o Force for urging the valve plate to open, F c The force that urges the valve plate to close.
8. The method as claimed in claim 1, wherein the step 4 is performed when P is a value F &At + delta%, the valve plate tends to close; when P is present F &At- δ%, the valve plate tends to open; when the content is-delta%<P F &At + delta%, the valve plate does not operate.
9. The method for simulating the movement of the trap valve plate in the gas circuit breaker according to claim 8, wherein if the valve plate tends to open due to the combined action of the gas pressure and the spring force, the grid at the valve plate is shifted to a certain position by sliding and moving, so that the valve plate is opened to a larger or final maximum opening position; on the contrary, if the valve plate tends to close under the combined action of the air pressure and the spring force, the grid at the valve plate shifts a certain position by sliding and moving, so that the valve plate is opened to a smaller or final closing position.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458629A (en) * | 2019-01-21 | 2020-07-28 | 平高集团有限公司 | Inversion method and device for mechanical fault of high-voltage switch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060230840A1 (en) * | 2004-11-16 | 2006-10-19 | Honeywell International Inc. | Method and system for modeling valve dynamic behavior using computational fluid dynamics |
| CN102338072A (en) * | 2011-08-31 | 2012-02-01 | 胡军 | Piezoelectric ceramic drive type ultra-miniature air pump |
| CN103323640A (en) * | 2013-06-25 | 2013-09-25 | 中国西电电气股份有限公司 | Extra-high-voltage direct-voltage voltage divider with heat dissipation device |
| CN107016203A (en) * | 2017-04-14 | 2017-08-04 | 江苏大学 | A kind of method for numerical simulation of photovoltaic water pump internal flow |
-
2017
- 2017-12-12 CN CN201711321269.XA patent/CN108052737A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060230840A1 (en) * | 2004-11-16 | 2006-10-19 | Honeywell International Inc. | Method and system for modeling valve dynamic behavior using computational fluid dynamics |
| CN102338072A (en) * | 2011-08-31 | 2012-02-01 | 胡军 | Piezoelectric ceramic drive type ultra-miniature air pump |
| CN103323640A (en) * | 2013-06-25 | 2013-09-25 | 中国西电电气股份有限公司 | Extra-high-voltage direct-voltage voltage divider with heat dissipation device |
| CN107016203A (en) * | 2017-04-14 | 2017-08-04 | 江苏大学 | A kind of method for numerical simulation of photovoltaic water pump internal flow |
Non-Patent Citations (2)
| Title |
|---|
| ESTEBAN FERRER 等: "A high order Discontinuous Galerkin – Fourier incompressible 3D Navier–Stokes solver with rotating sliding meshes", 《JOURNAL OF COMPUTATIONAL PHYSICS》 * |
| 郭泽 等: "短路电流对自能膨胀式高压SF6 断路器电弧开断", 《高压电技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458629A (en) * | 2019-01-21 | 2020-07-28 | 平高集团有限公司 | Inversion method and device for mechanical fault of high-voltage switch |
| CN111458629B (en) * | 2019-01-21 | 2022-03-29 | 平高集团有限公司 | Inversion method and device for mechanical fault of high-voltage switch |
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Application publication date: 20180518 |