CN220770038U - Wind vibration prevention device for transformer substation or converter station strut type equipment - Google Patents
Wind vibration prevention device for transformer substation or converter station strut type equipment Download PDFInfo
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- CN220770038U CN220770038U CN202320415615.5U CN202320415615U CN220770038U CN 220770038 U CN220770038 U CN 220770038U CN 202320415615 U CN202320415615 U CN 202320415615U CN 220770038 U CN220770038 U CN 220770038U
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- 230000002265 prevention Effects 0.000 title claims description 27
- 230000003287 optical effect Effects 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 8
- 239000000806 elastomer Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000004044 response Effects 0.000 abstract description 14
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 12
- 238000013016 damping Methods 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 6
- 230000000670 limiting effect Effects 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000541 pulsatile effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
A device for preventing wind vibrations in a substation or a converter station leg-like apparatus, said device comprising: the elastic body is directly or indirectly connected with the base plate, the elastic body rigidity adjusting component is respectively connected with the elastic body and the base plate, the balancing weight is fixed with the sliding block, and the damper is respectively connected with the balancing weight and the base plate. According to the utility model, the vibrator system consisting of the guide rail, the sliding block, the elastic body and the balancing weight is used for realizing the introduction of vibration energy, the damper is used for realizing the absorption and consumption of vibration energy, further realizing the frequency shift and wind vibration control of the strut type equipment, and effectively inhibiting the wind vibration response of the strut type equipment.
Description
Technical Field
The utility model belongs to the field of power grid disaster prevention equipment, and particularly relates to a wind vibration prevention device for a transformer substation or a converter station strut type equipment.
Background
There are various kinds of post-type high-voltage electric devices such as disconnectors, transformers, circuit breakers, etc. in substations or converter stations in high wind areas, which are important devices constituting the system loop in the station, playing a critical role in maintaining the normal operation of the electric power system. The post type electrical equipment of the ultra-high voltage transformer substation generally belongs to a high-rise structure, has small out-of-plane structural rigidity and low self-vibration frequency, is a typical wind sensitive structure, and is easy to generate obvious dynamic response under the action of wind load.
In recent years, wind vibration faults or damages under the action of strong wind occur when the prop equipment of the power transformation (current conversion) station in the strong wind area, which threatens the safe and stable operation of the power grid. Because the variety and specification of the post equipment in the station are various, the wind vibration response characteristics of the post equipment have diversity and uncertainty, and the wind vibration prevention device of the existing post equipment is generally only used for responding to earthquakes, so that the wind vibration control problem of the post equipment of the transformer substation cannot be solved by the existing wind vibration prevention device.
Disclosure of Invention
The utility model aims to solve the problem of wind vibration control of transformer substation strut type equipment.
The utility model aims at realizing the following technical scheme:
a device for preventing wind vibrations of a substation or a converter station leg-like apparatus, comprising: the elastic body is directly or indirectly connected with the base plate, the elastic body rigidity adjusting component is respectively connected with the elastic body and the base plate, the balancing weight is fixed with the sliding block, and the damper is respectively connected with the balancing weight and the base plate.
Preferably, the guide rail includes: the optical axis fixing device comprises a first fixing support fixed at one end of a bottom plate, a second fixing support fixed at the other end of the bottom plate and coaxial with the first fixing support, and optical axes of which two ends are respectively fixed with the first fixing support and the second fixing support.
Preferably, the optical axis comprises a circular optical axis.
Preferably, the elastomer comprises: a first elastic body arranged between the first fixed support and the sliding block, and a second elastic body arranged between the second fixed support and the sliding block.
Preferably, the elastomeric stiffness adjustment assembly comprises: the elastic body is connected with the first fixed support or the second fixed support, and the rigidity adjusting seat is connected with the elastic body and is in threaded fit with the fixed screw.
Preferably, the damper includes: one or a combination of more of an air damper, a hydraulic damper, a friction damper, or an air-hybrid damper.
Preferably, the damper comprises an adjustable damper.
Preferably, the elastic body includes a coil spring.
Preferably, the balancing weight is connected with the sliding block through bolts.
Preferably, the device further comprises a sealed housing.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model discloses a wind vibration prevention device for a transformer station or a converter station strut type device, which comprises: the elastic body is directly or indirectly connected with the base plate, the elastic body rigidity adjusting component is respectively connected with the elastic body and the base plate, the balancing weight is fixed with the sliding block, and the damper is respectively connected with the balancing weight and the base plate. According to the utility model, the vibrator system consisting of the guide rail, the sliding block, the elastic body and the balancing weight is used for realizing the introduction of vibration energy, the damper is used for realizing the absorption and consumption of vibration energy, further realizing the frequency shift and wind vibration control of the strut type equipment, and effectively inhibiting the wind vibration response of the strut type equipment.
Drawings
FIG. 1 is a schematic top view of the present utility model;
FIG. 2 is a schematic elevational view of the present utility model;
FIG. 3 is a schematic side view of the present utility model;
FIG. 4 is a graph of the time course of the pulsatile wind speed generated using a Kametal spectrum in accordance with the present utility model;
FIG. 5 is a diagram of a simulation model of the present utility model;
FIG. 6 is a diagram of the pulsating wind vibration response of the uncontrolled structure of the present utility model;
FIG. 7 is a graph comparing response amplitudes of a non-controlled structure and a TMD structure of the present utility model;
FIG. 8 is a vibration travel diagram of a TMD structure of the present utility model;
FIG. 9 is a simplified model of a wind vibration prevention device of the present utility model;
FIG. 10 is a mounting location diagram of the present utility model;
wherein: 1-bottom plate, 2-guide rail, 3-slider, 4-elastomer, 5-elastomer stiffness adjustment assembly, 6-balancing weight, 7-damper, 11-positioning stop, 12-bolt, 21-first fixed support, 22-second fixed support, 23-optical axis, 41-first elastomer, 42-second elastomer, 51-fixed screw sleeve, 52-stiffness adjustment seat, 70-damper housing, 71-bi-directional flow limiting valve, 72-damper support, 73-damper piston, 711-first flow limiting valve, 712-second flow limiting valve, 101-sliding support rod, 102-spring and damping, 103-inertial mass, 200-isolating switch mounting system, 201-insulator, 202-beam, 203-beam gap.
Detailed Description
The technical solution is further described below with reference to the drawings and the specific embodiments to help understand the content of the present utility model.
The utility model aims to realize the frequency shift and energy consumption functions of a strut device system by adopting a Tuned Mass Damper (TMD) technology and arranging a vibrator system with an adjustable stiffness spring and a mass block and air damping in the strut device in a large wind area power transformation (current conversion) station strut device, and effectively inhibit the wind vibration response of the strut device.
As shown in fig. 1, a wind vibration prevention device for a transformer station or a converter station post type apparatus, the device comprising: the device comprises a bottom plate 1 for mounting and fixing, a guide rail 2 fixedly connected with the bottom plate, a sliding block 3 slidingly connected with the guide rail, an elastic body 4 directly or indirectly connected and fixed with the sliding block 3 and the bottom plate 1, an elastic body rigidity adjusting component 5 respectively directly or indirectly connected with the elastic body 4 and the bottom plate 1, a balancing weight 6 fixedly connected with the sliding block 3 and a damper 7 respectively connected with the balancing weight 6 and the bottom plate 1.
For simplicity, the "wind vibration prevention device" and the "device" are hereinafter referred to as "wind vibration prevention device for a transformer station or a converter station strut type device" in the present utility model.
As shown in fig. 1 and 2, the guide rail 2 includes: a first fixed support 21 fixed at one end of the bottom plate 1, a second fixed support 22 fixed at the other end of the bottom plate and coaxial with the first fixed support, and an optical axis 23 with two ends fixed with the first fixed support and the second fixed support respectively.
The optical axis 23 comprises a circular optical axis.
The elastic body 4 includes: a first elastic body 41 installed between the first fixed support 21 and the slider 3, and a second elastic body 42 installed between the second fixed support 22 and the slider 3.
The elastomer stiffness adjustment assembly 5 comprises: a fixed screw sleeve 51 connected with the first fixed support 21 or the second fixed support 22, and a rigidity adjusting seat 52 connected with the elastic body 3 and in threaded fit with the fixed screw sleeve 51.
The types of damper include: one or more of an air damper, a hydraulic damper, a friction damper or a gas mixing damper are combined, and the advantages of different dampers can be comprehensively utilized by adopting different types of dampers so as to realize better energy consumption and vibration absorption effects.
As shown in fig. 1 and 3, the damper 7 of the present embodiment employs a hydraulic damper including a damper housing 70, a two-way restrictor valve 71, a damper mount 72, and a damper piston 73; the damper housing 70 is fixedly connected with the balancing weight 6 through bolts, the damper housing 70 is provided with piston holes at two sides and a damping liquid cavity inside, the bidirectional restrictor valve 71 is positioned in the middle of the damping liquid cavity, and the bidirectional restrictor valve 71 comprises a first restrictor valve 711 and a second restrictor valve 712.
The bidirectional restrictor valve 71 adopts an adjustable restrictor valve to realize the damping adjustable function of the damper 7, thereby realizing the optimization of the energy absorption and vibration reduction functions and the good adaptability to various strut devices; further, the bidirectional flow limiting valve 71 adopts an electrically controlled adjustable flow limiting valve, and realizes automatic adjustment damping of different types of equipment and weather conditions through a self-adaptive damping regulation and control system with a microcontroller, a speed sensor and an acceleration sensor so as to realize more optimized energy absorption and vibration reduction effects.
The elastic body 4 adopts a spiral spring or an air spring.
The balancing weight 6 is connected with the sliding block 3 through bolts.
As shown in fig. 2, the device further comprises a plurality of positioning stoppers 11 fixed to both sides of the base plate 1 for mounting and positioning the device. The device also comprises a protective casing (cube-sealed metal casing, not shown in the figure), and bolts 12 for fixing the protective casing are circumferentially distributed on the edge of the upper surface of the bottom plate.
In this embodiment, the connection mode, the assembly process, the heat treatment and the machining method are all inexhaustible technical details of the prior art, so that the description is omitted.
The following are specific design and simulation test procedures of the present utility model:
1. calculation basis
1) Quality information for disconnector mounting system
2) Modality information
The natural frequency is 0.91Hz through the 1 st order vibration mode calculation of the isolating switch installation system by the finite element simulation calculation of a computer; the natural frequency of the 2 nd-order vibration mode of the isolating switch installation system is calculated to be 2.03Hz; the 1 st, 4 th, 5 th and 10 th vibration modes of the moving contact and the support are out-of-plane bending vibration, the 2 nd, 7 th and 9 th vibration modes are in-plane vibration moving contact and the 3 rd, 6 th and 8 th vibration modes of the support are torsional vibration.
3) Calculating obtained response information:
it can be seen that the response has two features: the displacement is proportional to the square of the wind speed (R 2 =1), the moving contact displacement is proportional to the displacement of the top of the steel column (R 2 =0.9999). Because the known information is less, the geometric nonlinearity of vibration is ignored, and TMD vibration reduction design is carried out by considering only the out-of-plane 1-order vibration mode.
2. TMD design
1) Design goals
Under the same condition, when the wind speed is less than or equal to 34m/s, the displacement of the end part of the moving contact after closing is less than or equal to 150mm.
According to known response information, under the opening state, the displacement of the end part of the movable contact is 35.27 times of the displacement of the top of the steel column, under the closing state, 36.37 times of the displacement of the top of the steel column is controlled in the following way under the consideration of safety and the wind speed of 34 m/s:
therefore, the TMD design index of the single-degree-of-freedom system is that the structural displacement is less than or equal to 4.054mm under the working condition of 34m/s wind speed.
2) Simplified structural parameter estimation
(1) Structural mass
Taking the simplified structural mass as the total mass m in terms of safety, namely m=2568 kg.
(2) Structural rigidity
f 1 =0.91 Hz, so k satisfies:
k＝4π 2 f 1 2 m＝8.4×10 4 N/m
the structural damping ratio is 0.5%; wherein m is the total mass, f 1 K is the structural rigidity of the system, and pi is the circumferential rate.
(3) Area of windward
At a wind speed of 34m/s, the top displacement of the steel column is 5.55mm, and the static displacement is necessarily less than 5.55mm. Then there are:
F static state ＜kx＝465.94N
So its windward area S satisfies:
wherein: f (F) Static state For dead wind load, k is system structural rigidity, x is steel column top displacement, ρ is air density, and v is average wind speed.
3) Time course of fluctuating wind speeds
Let turbulence be 15% and average wind speed v=34 m/s, the time course of generating a pulsatile wind speed using the kametal spectrum is shown in fig. 4.
4) TMD preliminary design
Let TMD mass m TMD =30 kg, then the mass ratio μ is:
μ＝0.0117
the optimal TMD stiffness is:
wherein k is the structural rigidity of the system, and mu is the mass ratio of the TMD wind vibration prevention device to the isolating switch mounting system.
Optimal damping c TMD The method comprises the following steps:
5) A simplified structural Simulink simulation model of the installation TMD is built as shown in fig. 5.
6) Correcting the windward area according to the simulation result to obtain windward area S=0.13m 2 At this time, pulsation of the uncontrolled structureThe wind vibration response is shown in fig. 6, and the result is similar to the provided calculation result.
7) Structural response: the response of the uncontrolled structure (black), TMD structure (light grey) is shown in fig. 7. The maximum displacement of the mounted TMD structure (light gray) is 3.94mm, and the design target is met.
8) TMD stroke: the travel of the TMD is shown in FIG. 8, where the maximum travel of the TMD is 13.1mm.
9) Specific parameters of TMD are shown in the following table:
10 Simplified model of wind vibration prevention device for TMD calculation
As shown in fig. 9, the simplified model of the wind vibration prevention device used for the simulation calculation includes a slide support bar 101 (stroke±3 cm), a spring and damper 102 (k= 484.71N/m c =11.22N-s/m), and an inertial mass 103 (4 masses+connecting rod, 30kg total).
As shown in fig. 10, the wind vibration prevention device for the transformer substation or the converter station post equipment is arranged on the top of an insulator 201, and the preferred installation position is a beam gap 203 between a beam 202 and the upper equipment, and the axis of a guide rail 2 of the wind vibration prevention device is perpendicular to a plane formed by three insulators 201. The installation mode of the wind vibration prevention device of the utility model can generate good wind vibration prevention effect on the isolation switch installation system 200 in a strong wind area.
The vibration reduction technology and the vibration reduction device for the post equipment of the substation (converter) station in the heavy wind area can realize wind vibration response control by changing the resonance frequency and damping energy consumption of the post equipment system of the power station, effectively improve the wind vibration resistance of the post equipment structure and ensure the equipment body and the electrical safety.
The wind vibration prevention device has the main structural design characteristics that the tuned mass damper is adopted to perform wind vibration control design on the post equipment of the power transformation (current conversion) station in the strong wind area, so that the structural damping is increased, the structural mechanical energy is fully consumed, and the wind vibration prevention and resistance is improved.
The wind vibration prevention device has the characteristics of universal design, is fully combined with post-type electrical equipment in a station into a unified system through a reasonable connection mode, does not influence electrical safety, is convenient and quick to install, and has popularization and application potential.
The foregoing is illustrative of the present utility model and is not to be construed as limiting thereof, but rather as providing for the use of additional embodiments and advantages of all such modifications, equivalents, improvements and similar to the present utility model are intended to be included within the scope of the present utility model as defined by the appended claims.
Claims (10)
1. A device for preventing wind vibrations of a substation or a converter station leg-like apparatus, said device comprising: the elastic body is directly or indirectly connected with the base plate, the elastic body rigidity adjusting component is respectively connected with the elastic body and the base plate, the balancing weight is fixed with the sliding block, and the damper is respectively connected with the balancing weight and the base plate.
2. A station or converter station leg like equipment wind vibration prevention device according to claim 1, wherein said guide rail comprises: the optical axis fixing device comprises a first fixing support fixed at one end of a bottom plate, a second fixing support fixed at the other end of the bottom plate and coaxial with the first fixing support, and optical axes of which two ends are respectively fixed with the first fixing support and the second fixing support.
3. A substation or converter station pole-like equipment wind-vibration prevention device according to claim 2, characterized in that said optical axis comprises a circular optical axis.
4. A station or converter station leg-like apparatus wind vibration prevention device according to claim 2, wherein said elastomer comprises: a first elastic body arranged between the first fixed support and the sliding block, and a second elastic body arranged between the second fixed support and the sliding block.
5. A substation or converter station pole-like equipment wind vibration prevention device according to claim 2, wherein said elastomeric stiffness adjustment assembly comprises: the elastic body is connected with the first fixed support or the second fixed support, and the rigidity adjusting seat is connected with the elastic body and is in threaded fit with the fixed screw.
6. A station or converter station leg like device wind vibration prevention apparatus according to claim 1, wherein said damper comprises: one or a combination of more of an air damper, a hydraulic damper, a friction damper, or an air-hybrid damper.
7. A substation or converter station pole-like equipment wind vibration prevention device according to claim 1, characterized in that said damper comprises an adjustable damper.
8. A device for preventing wind vibrations of a substation or converter station pole-like equipment as in claim 1, in which the elastomer comprises a helical spring.
9. A device for preventing wind vibrations of a substation or converter station pole-like equipment as defined in claim 1, wherein said counterweight is bolted to said slide.
10. A device for preventing wind vibrations of a substation or a converter station leg-like installation according to claim 1, characterized in that the device further comprises a sealed enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320415615.5U CN220770038U (en) | 2023-03-08 | 2023-03-08 | Wind vibration prevention device for transformer substation or converter station strut type equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320415615.5U CN220770038U (en) | 2023-03-08 | 2023-03-08 | Wind vibration prevention device for transformer substation or converter station strut type equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220770038U true CN220770038U (en) | 2024-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320415615.5U Active CN220770038U (en) | 2023-03-08 | 2023-03-08 | Wind vibration prevention device for transformer substation or converter station strut type equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220770038U (en) |
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2023
- 2023-03-08 CN CN202320415615.5U patent/CN220770038U/en active Active
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