CN113078617A - Overvoltage protection device for wind power generation medium-voltage converter - Google Patents
Overvoltage protection device for wind power generation medium-voltage converter Download PDFInfo
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- CN113078617A CN113078617A CN202110373610.6A CN202110373610A CN113078617A CN 113078617 A CN113078617 A CN 113078617A CN 202110373610 A CN202110373610 A CN 202110373610A CN 113078617 A CN113078617 A CN 113078617A
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- fan blade
- folding fan
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Abstract
The invention discloses an overvoltage protection device for a wind power generation medium-voltage converter, which comprises a cross rod, wherein a lightning protection box is arranged on the top surface of the cross rod, a bearing disc is arranged on the surface of the cross rod in a surrounding manner, a folding fan blade is arranged on the surface of the bearing disc in a surrounding manner, a wind power induction box is arranged on the front surface of the folding fan blade, a support column is welded at the bottom of the cross rod, a fixing ring is sleeved at the bottom of the surface of the support column, a bottom plate is fixed at the bottom of the fixing ring through bolts, a base plate is arranged on the top surface of the bottom plate, a monitoring box is arranged at the top of the base plate, a heat dissipation disc is arranged on the inner. According to the invention, the wind power induction box is arranged, and the impact strength of hitting the soft ball detected by the pressure sensor is used for assisting in judging the wind power of the device in a wind power environment, so that whether overvoltage protection is required to be carried out on the device can be accurately detected.
Description
Technical Field
The invention relates to the technical field of overvoltage protection, in particular to an overvoltage protection device for a wind power generation medium-voltage converter.
Background
In the coastal area, the wind power resource is rich, the wind power blown through the sea surface can be used for wind power generation, so that the arm force of thermal power generation in a power generation system in China is reduced, the energy consumption is reduced, and during the wind power generation, an overvoltage protection device is generally needed to perform overvoltage protection on a medium-voltage converter used in the wind power generation process so as to avoid the damage of overlarge input voltage, which causes overlarge working current in the device and current breakdown, and the like, and in addition, the overlarge wind power causes the overhigh rotating speed of a fan blade in the wind power generation device and possibly causes larger induced current, so that the overvoltage protection device needs to control by emphasizing the rotating speed of the fan blade so as to realize corresponding overvoltage protection.
The existing overvoltage protection device has the following defects:
1. comparison document CN209823396U discloses an input overvoltage protection circuit, "including overvoltage protector, overvoltage protector's top is connected with the inlet wire connector lug, overvoltage protector's top is located the bilateral symmetry of inlet wire connector lug and is fixed with L type support through fixing stud spiral, and the top of L type support is rotated through rolling bearing and is connected with the bobbin, the top of L type support is connected with fixed sleeve through the link. The input overvoltage protection circuit is characterized in that an L-shaped support is fixed at the position of an incoming line connector lug, the top end of the L-shaped support is rotatably connected with a winding frame, the L-shaped support is connected with a fixed sleeve through a connecting frame, and the winding frame can wind an overlong incoming line so as not to cut the incoming line, and the incoming line can be limited and fixed through the fixed sleeve, so that the incoming line and the incoming line connector lug are connected more tightly and are not easy to loose, the fault caused by poor contact between the incoming line and the incoming line connector lug is prevented, but the device cannot provide an effective overvoltage protection structure, and the overvoltage protection function of the device is relatively weak;
2. the comparison document CN212434633U discloses an overvoltage protection device and an overvoltage protection circuit, which include a transient suppression diode assembly, a temperature fuse and a housing, wherein the transient suppression diode assembly and the temperature fuse are both disposed in the housing, and the transient suppression diode assembly is in surface contact with the temperature fuse, and the temperature fuse is configured to be disconnected when the temperature of the transient suppression diode assembly reaches a preset temperature; the first pin of the temperature fuse is used as a first leading-out pin of the overvoltage protection device, the second pin of the temperature fuse is electrically connected with the first pin of the transient suppression diode assembly, the second pin of the transient suppression diode assembly is used as a second leading-out pin of the overvoltage protection device, and the third pin of the transient suppression diode assembly is used as a third leading-out pin of the overvoltage protection device. The overvoltage protection device and the overvoltage protection circuit can prevent a situation that a transient suppression diode assembly generates fire when short circuit occurs, the device uses temperature change as the basis for starting the overvoltage protection function, but in a use environment with a good ventilation environment, the device has good heat dissipation, and the effectiveness of the temperature as the basis is reduced, so that the effectiveness of the starting basis of the overvoltage protection of the device is insufficient;
3. the comparison document CN206130224U discloses a high-temperature high-pressure strong-corrosion-resistant overvoltage protector, which comprises a sealing cover, an overvoltage protector main body, a valve core assembly and a spring assembly, wherein the valve core assembly is arranged in a column of the overvoltage protector, and the valve core assembly and the spring assembly form a force balance system; the technical scheme is suitable for all production process control devices with pressure sources or on-site pressure overvoltage protection, the overvoltage protection for adjusting the pressure values can be effectively realized through setting and adjusting a process pressure value mechanism (spring assembly), the pressure sources of overvoltage are quickly cut off, so that the process control devices or on-site safety protection are realized, and the double benefits of safety production and protection devices are received.
Disclosure of Invention
The invention aims to provide an overvoltage protection device for a wind power generation medium-voltage converter, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an overvoltage protection device for a wind power generation medium-voltage converter comprises a cross bar, wherein a lightning protection box is arranged on the top surface of the cross bar, the front surface of the lightning protection box is in an open design, a bearing disc is arranged on the surface of the cross rod in a surrounding manner, folding blades are arranged on the surface of the bearing disc in a surrounding manner, the folding fan blade is positioned in front of the lightning protection box and is in an open design, the wind power induction box is arranged on the front side of the folding fan blade, the bottom of the cross rod is welded with a support column, the interior of the supporting column is of a hollow structure, the bottom of the surface of the supporting column is sleeved with a fixing ring, the bottom of the fixing ring is fixed with a bottom plate through a bolt, the top surface of the bottom plate is provided with a base plate, the top of the base plate is provided with a monitoring box, the inner wall of support column installs the heat dissipation disc, the stabiliser is installed at the top of heat dissipation disc.
Preferably, an electric lift rod is installed to the inside diapire of folding fan blade, and the columniform extension fan blade is installed at an electric lift rod's top, and the limiting plate that four groups of equidistance were arranged is installed around the gomphosis to the surperficial bottom of extension fan blade, and the top cap is installed at the top of extension fan blade, and the area of top cap is greater than the cross sectional area of folding fan blade, and the spacing groove is all installed to the preceding back wall and the both sides inner wall of folding fan blade, and the size and the mounted position of spacing groove all with the limiting plate.
Preferably, connecting spring is installed to the inside roof of wind-force response box, and connecting spring's tail end is installed and is beaten soft ball, and the pressure sensors is all installed to the both sides inner wall of wind-force response box, hits the intermediate position that hits soft ball and be located two sets of pressure sensors, and pressure sensors and an electric lift pass through wire electric connection.
Preferably, the top surface mounting of lightning protection box has the decibel detector, the top surface mounting of lightning protection box has electric telescopic handle No. one, and electric telescopic handle is located the rear of decibel detector, the lightning rod of pointed tower form is installed at electric telescopic handle's top No. one, No. two electric telescopic handle are installed to the back wall of lightning protection box, No. two electric telescopic handle, an electric telescopic handle all with decibel detector electric connection, No. two electric telescopic handle's front end surface mounting has two sets of supplementary electric telescopic handle, one of them a set of supplementary electric telescopic handle is located another group's supplementary electric telescopic handle's side the place ahead.
Preferably, a U-shaped pipe is welded on the bottom wall inside the voltage stabilizer, an access coil and an output coil are respectively wound and installed on the surface of the U-shaped pipe, the output coil is located in front of the access coil, the coils of the output coil are distributed densely, a fixing box is welded on the bottom wall inside the voltage stabilizer, the fixing box is located on one side of the U-shaped pipe, the fixing box and the output coil are located on the same horizontal axis, an electromagnetic relay is installed on the inner top wall of the fixing box and electrically connected with a pressure inductor, sliding grooves are installed on the front inner wall and the rear inner wall of the fixing box, a magnet is installed in the sliding grooves in an embedded mode, the magnetic pole direction of the magnet is the same as the magnetic pole direction of the electromagnetic relay after the electromagnetic relay is electrified, a layer of insulating protective film is installed on the surface of the magnet, a reset spring is installed on, and the tail end of the metal rod is connected with the surface of the output coil.
Preferably, the inside of heat dissipation disc is equipped with the air vent that runs through, and the inclined ventilation pipe is installed to the bottom of air vent, and the tail end of ventilation pipe extends to the surface of support column, and the filter screen is installed to the inner wall of ventilation pipe.
Preferably, the electronic camera is installed to one side inner wall of control box, and the battery case is installed to the inside diapire of control box, battery case and electronic camera electric connection, and the side surface that the support column was kept away from to the control box is fixed with transparent closing cap through the bolt.
Preferably, No. two electric lift rods are all installed in the bottom four corners of bottom plate, and No. two electric lift rods pass through wire electric connection with pressure sensors, and the fixed plate is installed to the bottom of No. two electric lift rods, and the area of fixed plate is greater than the bottom plate, and the top surface four corners of fixed plate all runs through and installs fixing bolt, and fixing bolt is located the outside of No. two electric lift rods.
Preferably, the working steps of the device are as follows:
s1, when the folding fan blade is blown by wind power, the rotating speed of the folding fan blade is increased along with the increase of the wind power, at the moment, the wind power induction box on the surface of the folding fan blade also synchronously rotates along with the folding fan blade, when the wind power induction box moves to the top point of the circumference, the hitting soft ball is driven to hit the pressure sensor on the inner wall of one side of the wind power induction box under the action of the deviation force, when the rotating speed is higher, the deviation force is larger, the hitting force for hitting the soft ball is increased, and after the pressure sensor senses that the pressure exceeds a preset value, the conclusion that the wind speed of the device is too high can be obtained, and the overvoltage protection function of the device needs to be started;
s2, when the overvoltage protection effect is started, the pressure sensor sends a starting electric signal to the first electric lifting rod to drive the extension fan blade to extend, and further the overall length of the folding fan blade is increased, so that the effective contact area of a single folding fan blade and air during rotation is increased, the air resistance during rotation is increased, and the speed reduction effect is achieved;
s3, if the device is in thunder weather when working, the device can be protected from being damaged by lightning through the lightning protection box, because the decibel of thunder is generally in the range of 90-120 decibels, the decibel range of waves is in the range of 30-40 decibels when the sea surface is in no wind, and the decibel of waves is in the range of 90-110 decibels when the device is in strong wind weather above 8 level, when the device is in thunder weather, the ambient decibel is detected by a decibel detector, when the decibel value is above 90 decibels, starting electric signals can be sent to the first electric telescopic rod and the second electric telescopic rod, then the first electric telescopic rod is driven to extend upwards to drive the lightning rod at the top of the lightning rod to move upwards, and after the height of the top of the lightning rod exceeds the height of the folding fan blade, the lightning rod is positioned at the high-making point of the device, so that the lightning guiding effect can, the protection device reduces the damage caused by lightning;
s4, in lightning weather, rainfall is usually accompanied, when the first electric telescopic rod drives a lightning rod to perform corresponding lightning protection for the device, the second electric telescopic rod is started synchronously, extends out of the interior of the lightning protection box, is inserted into the installation gap of the two folding fan blades to prevent the two folding fan blades from continuing to rotate, then the electric telescopic rods are assisted to extend, the two adjacent folding fan blades are clamped, and the second electric telescopic rod is further enhanced to stop the rotating folding fan blades;
s5, when the pressure sensor senses that the wind power is large, the pressure sensor sends a starting electric signal to the electromagnetic relay to enable the electromagnetic relay to generate an electromagnetic effect, the magnet inside the sliding groove is repelled, the metal rod is driven to slide downwards along the surface of the output coil, the turn ratio of the access coil to the output coil is reduced, a corresponding voltage reduction effect is achieved, the voltage and the current output by the protection device cannot be too large, and the damage caused by current breakdown is reduced
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can judge that the environmental wind power of the device is overlarge after the hitting soft ball hitting acting force detected by the pressure sensor exceeds a preset value by installing the folding fan blades, the pressure sensor sends a starting electric signal to the electric lifting rod at the moment to drive the extension fan blades to extend, so that the whole length of the folding fan blades is increased, the effective contact area of the single folding fan blade and the air is increased when the single folding fan blade rotates, the air resistance is increased when the single folding fan blade rotates, the speed reduction effect is achieved, in the process, the limiting plate slides along the limiting groove along with the extension fan blades, the extension fan blades can be stably installed in the folding fan blades when the extension fan blades rotate, after the wind power is weakened, the hitting acting force sensed by the pressure sensor is reduced until the hitting acting force is lower than the preset value, stop sending the withdrawal signal of telecommunication to an electric lift rod this moment, an electric lift rod drives the inside withdrawal of extending the fan blade to folding fan blade this moment, and the top cap up to extending the fan blade top is supported by folding fan blade's port, stops to accomodate for folding fan blade forms the enclosed environment, and the protection internal assembly is not invaded by the outside.
2. The wind power induction box is installed and consists of the pressure sensor, the hitting soft ball and the connecting spring, the wind power induction box rotates synchronously along with the folding fan blades, after the wind power induction box moves to the top point of the circumference, the hitting soft ball fixed by the connecting spring is driven to hit the pressure sensor on the inner wall of one side of the wind power induction box under the action of the biasing force, the larger the biasing force is when the rotating speed is higher, the hitting force for hitting the soft ball is increased, and after the pressure sensed by the pressure sensor exceeds a preset value, a starting signal can be sent to the corresponding electrical appliance element, so that overvoltage protection is provided for the device.
3. The lightning protection box is installed, and consists of a decibel detector, a first electric telescopic rod, a lightning rod, a second electric telescopic rod and an auxiliary electric telescopic rod, wherein in thunderstorm weather, the decibel of the thunderstorm is larger, after the decibel detector detects large decibel of the thunderstorm, a starting electric signal is sent to the first electric telescopic rod and the second electric telescopic rod, then the first electric telescopic rod is driven to extend upwards to drive the lightning rod at the top of the first electric telescopic rod to move upwards until the height of the top of the lightning rod exceeds the height of the top of a folding fan blade, the lightning rod is positioned at a height-making point of the device, the lightning induction effect can be effectively achieved, the lightning damage is reduced by the protection device, in thunderstorm weather, rainfall is usually accompanied, when the first electric telescopic rod drives the lightning rod to perform corresponding lightning protection for the device, the second electric telescopic rod is synchronously started to extend out, and inserting the two folding fan blades into the mounting gap to prevent the two folding fan blades from continuously rotating, then assisting the electric telescopic rods to extend, clamping the two adjacent folding fan blades, and further strengthening the stopping treatment of the two electric telescopic rods on the rotating folding fan blades.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a lightning protection cartridge mounting structure of the present invention;
FIG. 3 is a schematic view of an assembly structure of a folding fan blade according to the present invention;
FIG. 4 is a schematic structural view of a wind detecting box according to the present invention;
FIG. 5 is a schematic view of an internal mounting structure of the voltage regulator of the present invention;
FIG. 6 is a schematic view of the internal installation structure of the fixing box of the present invention;
FIG. 7 is a schematic view of the surface structure of the support post of the present invention;
FIG. 8 is a schematic view of a heat-dissipating disk mounting structure according to the present invention;
fig. 9 is a schematic view of the mounting structure of the monitoring box of the present invention.
In the figure: 1. a cross bar; 2. a lightning protection box; 201. a decibel detector; 202. a first electric telescopic rod; 203. a lightning rod; 204. a second electric telescopic rod; 205. an auxiliary electric telescopic rod; 3. folding the fan blades; 301. a first electric lifting rod; 302. a limiting plate; 303. extending the fan blade; 304. a top cover; 305. a limiting groove; 4. a wind power induction box; 401. a pressure sensor; 402. hitting a soft ball; 403. a connecting spring; 5. a support pillar; 501. a base plate; 502. a second electric lifting rod; 503. a fixing plate; 6. a voltage regulator; 601. a fixing box; 602. connecting a coil; 603. an output coil; 604. a metal rod; 605. a magnet; 606. an electromagnetic relay; 607. a return spring; 7. a heat dissipation disc; 701. a vent hole; 702. filtering with a screen; 703. a vent pipe; 8. a monitoring box; 801. an electronic camera; 802. a battery case; 803. and (6) a transparent cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-9, an embodiment of the present invention is shown: an overvoltage protection device for a wind power generation medium-voltage converter comprises a cross rod 1, wherein a lightning protection box 2 is installed on the top surface of the cross rod 1, the front face of the lightning protection box 2 is in an open design, the cross rod 1 provides an installation position for the lightning protection box 2 and a bearing disc on the surface of the lightning protection box, the lightning protection box 2 judges whether the surrounding environment of the device is in a lightning stroke condition through an internal decibel detector 201, corresponding linkage measures are adopted to protect the device from being damaged by the lightning stroke, the bearing disc is installed on the surface of the cross rod 1 in a surrounding mode to provide an installation position for installing a folding fan blade 3, the folding fan blade 3 can be guaranteed to rotate under the action of wind power, the device is driven to carry out wind power generation, the folding fan blade 3 is installed on the surface of the bearing disc in a surrounding mode, the folding fan blade 3 is located in front of the lightning protection box 2, the folding fan blade, the front of the folding fan blade 3 is provided with a wind power induction box 4, the impact strength of hitting a soft ball 402 detected by a pressure sensor 401 assists in judging the wind power of the device in a wind power environment, the bottom of the cross rod 1 is welded with a support column 5, the support column 5 is of a hollow structure and provides a support effect for the cross rod 1, the bottom of the surface of the support column 5 is sleeved with a fixing ring, the bottom of the fixing ring is fixed with a bottom plate 501 through bolts, the bottom plate 501 and the support column 5 can be connected through the fixing ring to realize the fixed installation of the support column 5, the top surface of the bottom plate 501 is provided with a base plate, the top of the base plate is provided with a monitoring box 8, the base plate can provide an installation support effect for the installation of the monitoring box 8, the environment of the device is monitored and operated through the monitoring box 8, the inner wall of the support column 5 is provided with a, the voltage stabilizer 6 is installed at the top of the heat dissipation disc 7, when the wind power of the device is large, the current and voltage output by the device are increased, and the current breakdown damage caused by the overlarge current can be avoided by adjusting the output voltage.
The bottom wall of the interior of the folding fan blade 3 is provided with a first electric lifting rod 301, the top of the first electric lifting rod 301 is provided with a cylindrical extending fan blade 303, the bottom end of the surface of the extending fan blade 303 is provided with four groups of limit plates 302 which are arranged equidistantly in a surrounding and embedding manner, the top of the extending fan blade 303 is provided with a top cover 304, the area of the top cover 304 is larger than the section area of the folding fan blade 3, the front wall, the rear wall and the inner walls at two sides of the folding fan blade 3 are provided with limit grooves 305, the size and the installation position of the limit grooves 305 are respectively corresponding to the limit plates 302, after the hitting acting force of hitting the soft ball 402 detected by a pressure sensor 401 exceeds a preset value, the environmental wind power of the device can be judged to be overlarge, at the moment, the pressure sensor 401 sends a starting electric signal to the first electric lifting rod 301, the extending fan blade 303 is driven to extend, increase its air resistance when rotating, and then play the effect of deceleration, in this process, limiting plate 302 slides along spacing groove 305 along extending fan blade 303, and then guaranteed that extending fan blade 303 can stable installation in folding fan blade 3's inside when rotating, after the wind-force weakens, the hitting effort that pressure sensor 401 sensed reduces, until being less than the default after, stop sending the withdrawal signal of telecommunication to electric lift rod 301 this moment, electric lift rod 301 drives extending fan blade 303 and withdraws to folding fan blade 3's inside this moment, until the top cap 304 at extending fan blade 303 top is supported by folding fan blade 3's port, stop accomodating, make folding fan blade 3 form the enclosed environment, protect the inner assembly not invaded by the outside.
The top wall of the interior of the wind power induction box 4 is provided with a connecting spring 403, the tail end of the connecting spring 403 is provided with a hitting soft ball 402, the inner walls of two sides of the wind power induction box 4 are provided with pressure sensors 401, the hitting soft ball 402 is positioned in the middle of the two sets of pressure sensors 401, the pressure sensors 401 are electrically connected with the first electric lifting rod 301 through conducting wires, the wind power induction box 4 synchronously rotates along with the folding fan blades 3, when the wind power induction box 4 moves to the top point of the circumference, the hitting soft ball 402 fixed by the connecting spring 403 is driven to hit the pressure sensors 401 on the inner wall of one side of the wind power induction box 4 under the action of a bias force, the bias force is larger when the rotating speed is higher, the hitting force of the hitting soft ball 402 is increased accordingly, and after the pressure sensed by the pressure sensors 401 exceeds a preset value, a starting signal can be sent to corresponding electric appliance components, providing overvoltage protection for the device.
The decibel detector 201 is installed on the top surface of the lightning protection box 2, the first electric telescopic rod 202 is located behind the decibel detector 201, the pointed lightning rod 203 is installed on the top of the first electric telescopic rod 202, the second electric telescopic rod 204 is installed on the rear wall of the lightning protection box 2, the second electric telescopic rod 204 and the first electric telescopic rod 202 are both electrically connected with the decibel detector 201, two groups of auxiliary electric telescopic rods 205 are installed on the front end surface of the second electric telescopic rod 204, one group of auxiliary electric telescopic rods 205 is located in front of the other group of auxiliary electric telescopic rods 205, in thunderstorm weather, the decibel of thunder is large, after the decibel detector 201 detects large decibel of thunder, starting electric signals are sent to the first electric telescopic rod 202 and the second electric telescopic rod 204, and then the first electric telescopic rod 202 is driven to extend upwards, the lightning rod 203 at the top of the lightning rod 203 is driven to move upwards until the top height of the lightning rod 203 exceeds the top height of the folding fan blade 3, the lightning rod 203 is located at a height-making point of the device, a lightning guiding effect can be effectively achieved, the protection device reduces lightning damage, and in lightning weather, rainfall is usually accompanied, when the electric telescopic rod 202 drives the lightning rod 203 to perform corresponding lightning protection on the device, the electric telescopic rod 204 is synchronously started, extends out of the interior of the lightning protection box 2 and is inserted into an installation gap of the two folding fan blades 3 to prevent the device from continuing to rotate, the electric telescopic rod 205 is then assisted to extend, two adjacent folding fan blades 3 are clamped, and the stopping processing of the folding fan blades 3 in rotation is further enhanced by the electric telescopic rod 204.
The inner bottom wall of the voltage stabilizer 6 is welded with a U-shaped pipe, the surface of the U-shaped pipe is respectively wound with an access coil 602 and an output coil 603, the output coil 603 is positioned in front of the access coil 602, the coils of the output coil 603 are distributed densely, the inner bottom wall of the voltage stabilizer 6 is welded with a fixed box 601, the fixed box 601 is positioned at one side of the U-shaped pipe, the fixed box 601 and the output coil 603 are positioned on the same horizontal axis, the inner top wall of the fixed box 601 is provided with an electromagnetic relay 606, the electromagnetic relay 606 is electrically connected with the pressure inductor 401, the front inner wall and the rear inner wall of the fixed box 601 are both provided with a sliding chute, a magnet 605 is embedded inside the sliding chute, the magnetic pole direction of the magnet 605 is the same as the magnetic pole direction of the electromagnetic relay 606 after being electrified, the surface of the magnet 605 is provided with a layer of, a metal rod 604 is installed on one side surface of the magnet 605 near the U-shaped tube, and the tail end of the metal rod 604 is connected with the surface of the output coil 603, when the pressure sensor 401 senses that the wind force is large, a starting electric signal is sent to the electromagnetic relay 606, so that an electromagnetic effect is generated, the magnet 605 in the chute is repelled to drive the metal rod 604 to slide down along the surface of the output coil 603, and then reduce the turn ratio of inserting coil 602 and output coil 603, play corresponding step-down effect, protection device output voltage electric current can not be too big, reduce the electric current and puncture the injury, later wind-force weakens, magnet 605 moves up along the inside spout of fixed box 601 under reset spring 607's drive, then drives metal pole 604 and moves up along the surface of output coil 603, resumes the turn ratio between the coil 602 of inserting that originally set for and the output coil 603 to guarantee output voltage's stability.
The inside of heat dissipation disc 7 is equipped with the air vent 701 that runs through, the ventilation pipe 703 of slope is installed to the bottom of air vent 701, the tail end of ventilation pipe 703 extends to the surface of support column 5, filter screen 702 is installed to the inner wall of ventilation pipe 703, the heat that the inside during operation of stabiliser 6 produced passes through air vent 701 and transmits to ventilation pipe 703 department, and because ventilation pipe 703 is the slope design, even consequently when support column 5 surface adheres to the rainwater, the rainwater also can't get into the inside of support column 5 through the ventilation pipe 703 of slope, the result of rainwater erosion has been avoided, the installation of filter screen 702, then can avoid foreign matters such as little winged insect to get into inside the support column 5 through ventilation pipe 703, the safety of.
The electronic camera 801 is installed to one side inner wall of control box 8, battery case 802 is installed to the inside diapire of control box 8, battery case 802 and electronic camera 801 electric connection, control box 8 is kept away from one side surface of support column 5 and is fixed with transparent closing cap 803 through the bolt, electronic camera 801 is as the core component, can take a video recording monitoring process with the environment of device place, so that the staff can go deep into understanding the device operational environment, battery case 802 is as power supply structure, can provide power supply for electronic camera 801's work, and transparent closing cap 803 outside foreign matter can be protected, rainwater can not get into control box 8 internal interference inside electronic camera 801, and transparent material can not produce the interference to electronic camera 801 camera work yet.
No. two electric lift poles 502 are all installed to bottom four corners of bottom plate 501, No. two electric lift poles 502 pass through wire electric connection with pressure sensors 401, fixed plate 503 is installed to No. two electric lift poles 502's bottom, the area of fixed plate 503 is greater than bottom plate 501, the top surface four corners of fixed plate 503 all runs through and installs fixing bolt, fixing bolt is located No. two electric lift poles 502's the outside, when pressure sensors 401 detected device environment wind-force to increase, send start signal to No. two electric lift poles 502, make it shrink downwards, and then drive bottom plate 501 and descend, the overall height of reduction device, blow the danger of turning over the device with reduction wind-force, the inside fixing bolt of fixed plate 503 accessible, fix whole device in mounted position department, reach the purpose of fixed point installation.
The working steps of the device are as follows:
s1, when the folding fan blade 3 is blown by wind, the rotating speed of the folding fan blade 3 is increased along with the increase of the wind power, at the moment, the wind power induction box 4 on the surface of the folding fan blade 3 also synchronously rotates along with the folding fan blade 3, when the wind power induction box 4 moves to the top point of the circumference, the hitting soft ball 402 is driven to hit the pressure inductor 401 on the inner wall of one side of the wind power induction box 4 under the action of the deviation force, when the rotating speed is higher, the magnitude of the deviation force is larger, the hitting force for hitting the soft ball 402 is increased, and when the pressure inductor 401 senses that the pressure exceeds a preset value, the conclusion that the wind speed of the device is too high can be obtained, and the overpressure protection function of the device needs to be started;
s2, when the overvoltage protection effect is started, the pressure sensor 401 sends a starting electric signal to the first electric lifting rod 301 to drive the extension fan blade 303 to extend, and further the overall length of the folding fan blade 3 is increased, so that the effective contact area of the single folding fan blade 3 with air during rotation is increased, the air resistance during rotation is increased, and the speed reduction effect is achieved;
s3, if the device is in thunder weather when working, the device can be protected from being damaged by lightning through the lightning protection box 2, because the decibel of thunder is generally in the range of 90-120 decibels, the decibel range of wave is in the range of 30-40 decibels when the sea surface is in no wind, and the decibel of wave is in the range of 90-110 decibels when the weather is strong wind above 8 level, when the device is in thunder weather, the decibel detector 201 is used for detecting the decibel of the surrounding environment, when the decibel value is above 90 decibels, the starting electric signals can be sent to the first electric telescopic rod 202 and the second electric telescopic rod 204, then the first electric telescopic rod 202 is driven to extend upwards to drive the lightning rod 203 at the top of the first electric telescopic rod to move upwards until the height of the top of the lightning rod 203 exceeds the height of the top of the folding fan blade 3, the lightning rod 203 is located at the height-, the lightning-induced effect can be effectively achieved, and the lightning stroke damage can be reduced by the protection device;
s4, in lightning weather, rainfall is usually accompanied, when the first electric telescopic rod 202 drives the lightning rod 203 to perform corresponding lightning protection for the device, the second electric telescopic rod 204 is synchronously started, extends out of the interior of the lightning protection box 2, is inserted into the installation gap of the two folding fan blades 3 to prevent the two folding fan blades from continuing to rotate, then the electric telescopic rod 205 is assisted to extend, the two adjacent folding fan blades 3 are clamped, and the second electric telescopic rod 204 is further enhanced to stop the rotating folding fan blades 3;
s5, when the pressure sensor 401 senses that the wind force is large, a starting electric signal is sent to the electromagnetic relay 606, the electromagnetic relay generates an electromagnetic effect, a magnet 605 in the sliding groove is repelled, the metal rod 604 is driven to slide downwards along the surface of the output coil 603, the turn ratio of the access coil 602 to the output coil 603 is reduced, a corresponding voltage reduction effect is achieved, the voltage and current output by the protection device cannot be too large, and the current breakdown damage is reduced.
The working principle is as follows: when the folding fan blade 3 is blown by wind power, the rotating speed of the folding fan blade 3 is increased along with the increase of the wind power, at the moment, the wind power induction box 4 on the surface of the folding fan blade 3 also synchronously rotates along with the folding fan blade 3, when the wind power induction box 4 moves to the top point of the circumference, the striking soft ball 402 is driven to strike the pressure inductor 401 on the inner wall of one side of the wind power induction box 4 under the action of the deviation force, the deviation force is larger when the rotating speed is higher, the striking force of the striking soft ball 402 is increased, when the pressure inductor 401 senses that the pressure exceeds a preset value, the pressure inductor 401 sends a starting electric signal to the first electric lifting rod 301, the extension fan blade 303 is driven to extend, the overall length of the folding fan blade 3 is increased, the effective contact area of the single folding fan blade 3 with the air when rotating is increased, and the air resistance when the folding fan blade rotates is increased, further, the effect of reducing the speed is achieved, in the process, the limit plate 302 slides along the limit groove 305 along with the extension fan blade 303, so that the extension fan blade 303 can be stably installed inside the folding fan blade 3 when rotating, when the device works in the thunderbolt weather, the device can be protected from being damaged by the thunderbolt through the lightning protection box 2, because the decibel of the thunderbolt is generally within the range of 90-120 decibels, the decibel range of the wave is within the range of 30-40 decibels when the sea surface is in the windless condition, and the decibel range of the wave is within the range of 90-110 decibels when the device is in the gale weather of more than 8 grades, when the device is in the thunderbolt weather, the decibel detector 201 is used for detecting the ambient decibel, when the decibel value is more than 90 decibels, the start electric signals can be sent to the first electric telescopic rod 202 and the second electric telescopic rod 204, the lightning rod 203 at the top of the lightning rod 203 is driven to move upwards until the top height of the lightning rod 203 exceeds the top height of the folding fan blade 3, the lightning rod 203 is positioned at a height-making point of the device, so that a lightning guiding effect can be effectively achieved, the protection device reduces lightning damage, in lightning weather, rainfall is usually accompanied, when the first electric telescopic rod 202 drives the lightning rod 203 to perform corresponding lightning protection on the device, the second electric telescopic rod 204 is synchronously started, extends out of the interior of the lightning protection box 2 and is inserted into an installation gap of the two folding fan blades 3 to prevent the two folding fan blades from continuing to rotate, then the electric telescopic rod 205 is assisted to extend to clamp the two adjacent folding fan blades 3, the second electric telescopic rod 204 is further enhanced to stop the rotating folding fan blades 3, when the pressure sensor 401 senses large wind force, a starting electric signal is sent to the electromagnetic relay 606 to enable the electromagnetic effect to be generated, the magnets 605 in the sliding groove are repelled to drive the metal rod 604 to slide downwards along the surface of the output coil 603, so that the turn ratio of the access coil 602 to the output coil 603 is reduced, a corresponding voltage reduction effect is achieved, the output voltage and current of the protection device are not too large, and the current breakdown damage is reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a wind power generation is overvoltage crowbar for medium voltage converter, includes horizontal pole (1), its characterized in that: the lightning protection box (2) is installed on the surface of the top of the cross rod (1), the front of the lightning protection box (2) is designed in an open mode, a bearing disc is installed on the surface of the cross rod (1) in a surrounding mode, folding fan blades (3) are installed on the surface of the bearing disc in a surrounding mode, the folding fan blades (3) are located in the front of the lightning protection box (2), the folding fan blades (3) are designed in an open mode, a wind induction box (4) is installed on the front of the folding fan blades (3), supporting columns (5) are welded at the bottom of the cross rod (1), hollow structures are arranged inside the supporting columns (5), fixing rings are sleeved at the bottom of the surfaces of the supporting columns (5), a bottom plate (501) is fixed to the bottom of the fixing rings through bolts, a base plate is installed on the surface of the top of the bottom plate (501), a monitoring box (8) is installed at the top of the, and a voltage stabilizer (6) is arranged at the top of the heat dissipation disc (7).
2. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: electric lift pole (301) is installed to the inside diapire of folding fan blade (3), columniform extension fan blade (303) is installed at the top of electric lift pole (301), limiting plate (302) that four groups of equidistance were arranged are installed to the surperficial bottom of extending fan blade (303) around the gomphosis, top cap (304) are installed at the top of extending fan blade (303), the area of top cap (304) is greater than the sectional area of folding fan blade (3), spacing groove (305) are all installed to the preceding back wall and the both sides inner wall of folding fan blade (3), and the size and the mounted position of spacing groove (305) all with limiting plate (302) one-to-one.
3. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: connecting spring (403) are installed to the inside roof of wind-force response box (4), and the tail end of connecting spring (403) is installed and is beaten soft ball (402), and pressure sensors (401) are all installed to the both sides inner wall of wind-force response box (4), hit and beat the intermediate position that soft ball (402) are located two sets of pressure sensors (401), and pressure sensors (401) and an electric lift pole (301) pass through wire electric connection.
4. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: the utility model discloses a lightning protection device, including lightning protection box (2), the top surface mounting of lightning protection box (2) has decibel detector (201), the top surface mounting of lightning protection box (2) has electric telescopic handle (202) No. one, and electric telescopic handle (202) are located the rear of decibel detector (201), lightning rod (203) of tip tower form are installed at the top of electric telescopic handle (202), No. two electric telescopic handle (204) are installed to the back wall of lightning protection box (2), No. two electric telescopic handle (204), an electric telescopic handle (202) all with decibel detector (201) electric connection, the front end surface mounting of No. two electric telescopic handle (204) has two sets of supplementary electric telescopic handle (205), wherein a set of supplementary electric telescopic handle (205) are located the side the place ahead of another group supplementary electric telescopic handle (205).
5. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: the inner bottom wall of the voltage stabilizer (6) is welded with a U-shaped pipe, the surface of the U-shaped pipe is respectively wound with an access coil (602) and an output coil (603), the output coil (603) is positioned in front of the access coil (602), the coils of the output coil (603) are distributed densely, the inner bottom wall of the voltage stabilizer (6) is welded with a fixed box (601), the fixed box (601) is positioned on one side of the U-shaped pipe, the fixed box (601) and the output coil (603) are positioned on the same horizontal axis, an electromagnetic relay (606) is arranged on the inner top wall of the fixed box (601), the electromagnetic relay (606) is electrically connected with a pressure inductor (401), sliding grooves are arranged on the front inner wall and the rear wall of the fixed box (601), a magnet (605) is embedded in the sliding grooves, the magnetic pole direction of the magnet (605) is the same as the magnetic pole direction of the electromagnetic relay (606) after being electrified, reset spring (607) is installed to the inside diapire of fixed box (601), and the top of reset spring (607) is connected with the bottom of magnet (605), and magnet (605) are close to one side surface mounting of U type pipe has metal pole (604), and the tail end of metal pole (604) is connected with the surface of output coil (603).
6. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: the inside of heat dissipation disc (7) is equipped with air vent (701) that runs through, and inclined ventilation pipe (703) are installed to the bottom of air vent (701), and the tail end of ventilation pipe (703) extends to the surface of support column (5), and filter screen (702) are installed to the inner wall of ventilation pipe (703).
7. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: electronic camera (801) are installed to one side inner wall of control box (8), and battery case (802) are installed to the inside diapire of control box (8), and battery case (802) and electronic camera (801) electric connection, one side surface that support column (5) were kept away from in control box (8) is fixed with transparent closing cap (803) through the bolt.
8. The overvoltage protection device for the wind power generation medium voltage converter according to claim 1, wherein: no. two electric lift pole (502) are all installed in the bottom four corners of bottom plate (501), and No. two electric lift pole (502) pass through wire electric connection with pressure sensors (401), and fixed plate (503) are installed to the bottom of No. two electric lift pole (502), and the area of fixed plate (503) is greater than bottom plate (501), and the top surface four corners of fixed plate (503) all runs through and installs fixing bolt, and fixing bolt is located the outside of No. two electric lift pole (502).
9. An overvoltage protection device for wind power generation medium voltage converters according to any of claims 1 to 8, the device operating as follows:
s1, when the folding fan blade (3) is blown by wind power, the rotating speed of the folding fan blade (3) is increased along with the increase of the wind power, at the moment, the wind power induction box (4) on the surface of the folding fan blade (3) also synchronously rotates along with the folding fan blade (3), when the wind power induction box (4) moves to the top point of the circumference, the hitting soft ball (402) is driven to hit the pressure sensor (401) on the inner wall of one side of the wind power induction box (4) under the action of the deviation force, the larger the deviation force is when the rotating speed is higher, the hitting force of the hitting soft ball (402) is increased, and after the pressure sensor (401) senses that the pressure exceeds a preset value, the conclusion that the wind speed of the device is too high can be obtained, and the overpressure protection function of the device needs to be started;
s2, when an overvoltage protection effect is started, the pressure sensor (401) sends a starting electric signal to the first electric lifting rod (301), so that the extending fan blade (303) is driven to extend, and the overall length of the folding fan blade (3) is increased, so that the effective contact area of the single folding fan blade (3) and air when rotating is increased, the air resistance when the single folding fan blade rotates is increased, and the speed reduction effect is achieved;
s3, if the device is in thunder weather when working, the device can be protected from being damaged by lightning through the lightning protection box (2), because the decibel of thunder is generally within 90-120 decibel, the decibel range of wave is within 30-40 decibel when the sea surface is in no wind, and the decibel of wave is within 90-110 decibel when the sea surface is in high wind weather above 8 level, when the device is in thunder weather, the decibel detector (201) is used for detecting the decibel of the surrounding environment, when the decibel value is above 90 decibel, the starting electric signals can be sent to the first electric telescopic rod (202) and the second electric telescopic rod (204), and then the first electric telescopic rod (202) is driven to extend upwards to drive the lightning rod (203) at the top of the first electric telescopic rod to move upwards until the top height of the lightning rod (203) exceeds the top height of the folding fan blade (3), the lightning rod (203) is positioned at a height-making point of the device, so that a lightning-inducing effect can be effectively achieved, and the device is protected from being damaged by lightning;
s4, in thunderbolt weather, rainfall is usually accompanied, when the first electric telescopic rod (202) drives the lightning rod (203) to perform corresponding lightning protection for the device, the second electric telescopic rod (204) is started synchronously, extends out of the lightning protection box (2), is inserted into the installation gap of the two folding fan blades (3) to prevent the two folding fan blades from continuing to rotate, then the electric telescopic rod (205) is assisted to extend to clamp the two adjacent folding fan blades (3), and further the second electric telescopic rod (204) is strengthened to stop the rotating folding fan blades (3);
s5, when the pressure sensor (401) senses that the wind power is large, a starting electric signal is sent to the electromagnetic relay (606), the electromagnetic relay generates an electromagnetic effect, a magnet (605) in the sliding groove is repelled, the metal rod (604) is driven to slide downwards along the surface of the output coil (603), the turn ratio of the access coil (602) to the output coil (603) is further reduced, a corresponding voltage reduction effect is achieved, the voltage and current output by the protection device cannot be too large, and the current breakdown damage is reduced.
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| CN202110373610.6A CN113078617B (en) | 2021-04-07 | 2021-04-07 | Overvoltage protection device for wind power generation medium-voltage converter |
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| CN202110373610.6A CN113078617B (en) | 2021-04-07 | 2021-04-07 | Overvoltage protection device for wind power generation medium-voltage converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441815A (en) * | 2022-09-16 | 2022-12-06 | 德清万投新能源有限公司 | Photovoltaic power generation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201854023U (en) * | 2010-11-26 | 2011-06-01 | 哈尔滨哈飞工业有限责任公司 | Lightning protection system of wind generating set |
| TW202028606A (en) * | 2019-01-28 | 2020-08-01 | 日商日立製作所股份有限公司 | Blade detection system of wind-based power generation device, wind-based power generation system, and remote integration monitoring system of wind-based power generation station characterized by providing a blade detection system of the wind-based power generation device capable of shortening its run down time caused by the blade abnormality of being headed by lightning and can accurately estimate the damage condition of blade |
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2021
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201854023U (en) * | 2010-11-26 | 2011-06-01 | 哈尔滨哈飞工业有限责任公司 | Lightning protection system of wind generating set |
| TW202028606A (en) * | 2019-01-28 | 2020-08-01 | 日商日立製作所股份有限公司 | Blade detection system of wind-based power generation device, wind-based power generation system, and remote integration monitoring system of wind-based power generation station characterized by providing a blade detection system of the wind-based power generation device capable of shortening its run down time caused by the blade abnormality of being headed by lightning and can accurately estimate the damage condition of blade |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441815A (en) * | 2022-09-16 | 2022-12-06 | 德清万投新能源有限公司 | Photovoltaic power generation device |
| CN115441815B (en) * | 2022-09-16 | 2023-09-01 | 广东嘉裕智改新能源科技有限公司 | Photovoltaic power generation device |
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