LU504578B1

LU504578B1 - Generator protection apparatus with over-voltage protection

Info

Publication number: LU504578B1
Application number: LU504578A
Authority: LU
Inventors: Yinzhong Chu; Zhenming Jiang; Cheng Zhang; Yongjun Chen; Xiao Shen; Hongwei Zhao; Yue Wang
Original assignee: Huaneng Nantong Huaneng Power Generation Co Ltd; Nantongtianshenggang Power Generating Corp L T D; Jiangsu Nantong Power Generation Co Ltd
Priority date: 2022-08-26
Filing date: 2023-06-22
Publication date: 2023-12-22
Also published as: CN115473384A; CN115473384B

Abstract

The present invention discloses a generator protection apparatus with over-voltage protection, comprising a shell assembly, comprising a shell, a protective shell arranged in the shell and a buffer component arranged between the protective shell and the shell; a protective assembly, comprising a circuit breaking piece arranged in the protective shell, a fuse piece arranged on the circuit breaking piece and a heat dissipation piece arranged in the protective shell; and a heat dissipation assembly arranged in the protective shell. During pressure relief of the present invention, it can ensure that an upward movement process of the starting block is not affected, and completed rapidly (so as to adapt to rapid expansion of air pressure and reduce a risk); and meanwhile, it can also ensure that a reset process of the starting block is completed slowly, so as to prevent a risk of frequent high-frequency arcs within a short time. Therefore, a starting time of the starting block and a time period for pressure relief are prolonged, and the generator protection apparatus is safer.

Description

BL-5709

GENERATOR PROTECTION APPARATUS WITH OVER-VOLTAGE LU504578

PROTECTION

BACKGROUND OF THE INVENTION

[0001] 1. Technical Field

[0002] The present invention relates to the technical field of over-voltage protection, and in particular to a generator protection apparatus with over-voltage protection.

[0003] 2. Description of Related Art

[0004] Over-voltage protection is used for protecting a stator over-voltage caused by various operating conditions of a generator, regardless of a no-load condition and a load condition of the generator. During action, the generator is first disconnected, followed by tripping of a magnetic blow-out switch for discharge and magnetic blow-out. In the prior art, an over-voltage protection of the generator takes a setting value of 1.3 times (Le. 1.3 times a rated voltage of the generator) and acts for 0.5 s. However, in fact, during faulty forced excitation under the no-load condition, a rising voltage of the generator will promote a rising rotor current, that is, rising rotor magnetic energy. The rotor of the generator suddenly withstands more than 2 times a rated excitation voltage, and the rotor current and a stator voltage rise rapidly. Due to a saturation factor of the no-load characteristic of the generator, if the stator voltage rises to 1.3 times, the rotor current has reached about 2 times the rated excitation current. As an action voltage for over-voltage protection of the generator is 1.3 times and delayed for 0.5 s, plus actions of the magnetic blow-out switch and a trip circuit are delayed for 0.1 s, at this time, the stator voltage approaches 1.4 times, the rotor current and the rotor magnetic energy approach 3 times. Tripping the magnetic blow-out switch under such large current and large energy has risks of failure in magnetic blow-out and the burned magnetic blow- 1

BL-5709 out switch. LU504578

[0005] That is to say, the above-mentioned over-voltage protection method in the prior art has the disadvantages of poor handling of stator over-voltage caused by self-shunt excitation no-load faulty forced excitation, increase in a burden of the magnetic blow- out switch, great potential safety hazards and the like.

BRIEF SUMMARY OF THE INVENTION

[0006] The purpose of this section is to outline certain aspects of the embodiments of the present invention and provide a brief introduction to some preferred embodiments.

Simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid ambiguity in their purpose. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In view of the above problems of an existing generator protection apparatus with over-voltage protection, the present invention is proposed.

[0008] Therefore, the purpose of the present invention is to provide a generator protection apparatus with over-voltage protection.

[0009] In order to solve the above technical problems, the present invention provides a technical solution as follows: a generator protection apparatus with over-voltage protection includes a shell assembly, including a shell, a protective shell arranged in the shell and a buffer component arranged between the protective shell and the shell; a protective assembly, including a circuit breaking piece arranged in the protective shell, a fuse piece arranged on the circuit breaking piece and a heat dissipation piece arranged in the protective shell; and a heat dissipation assembly arranged in the protective shell.

[0010] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where the buffer component includes an 2

BL-5709 abutment plate arranged on an inner side surface of the shell, a buffer rod arranged on LUS04578 the abutment plate and a buffer barrel arranged on the protective shell; the buffer barrel is provided with a buffer solution inside; a buffer plate 1s arranged at one end, extending into the buffer barrel, of the buffer rod; and

[0011] a via hole is formed in the buffer plate.

[0012] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where an end cover is arranged at an upper end of the buffer barrel; a sliding hole allowing the buffer rod to slip is formed in the end cover; and the sliding hole is provided with a sealing ring inside.

[0013] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where the circuit breaking piece includes a mounting shell directly connected with a generator, and an air switch arranged in the mounting shell; a mounting groove is formed in the mounting shell; the air switch is arranged in the mounting groove, and electrically connected with the generator; and the mounting groove is provided with a mounting piece inside.

[0014] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where the mounting piece includes a pullup rod arranged in the mounting groove, a grasping jaw arranged at a lower end of the pullup rod and a linking rod connected with the pullup rod; and one end, away from the grasping jaw, of the linking rod is bended downward, and connected with the heat dissipation assembly,

[0015] where a rotating disk is arranged at a lower end of the pullup rod, and provided with a drive guide rail; mating teeth matched with the drive guide rail are arranged at a lower end of the grasping jaw; engaging teeth are arranged at a lower end of the rotating disk; a rotating rod is rotationally connected with an interior of the mounting groove; 3

BL-5709 and a rotating gear engaged with the engaging teeth is arranged at an end part of the LUS04578 rotating rod.

[0016] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where the heat dissipation assembly includes a heat dissipation grid arranged in the protective shell, a heat dissipation pipeline arranged on the heat dissipation grid, and a cooling fan arranged at a lower end of the heat dissipation pipeline; the cooling fan is connected with the heat dissipation grid; a covering case is arranged at a lower end of the heat dissipation pipeline; and a connecting piece is arranged between the cooling fan and the heat dissipation grid.

[0017] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where an upper end of the heat dissipation pipeline is connected with a starting piece; the starting piece includes a connecting block connected with the heat dissipation pipeline, a retention groove formed in the connecting block, a starting block in slippable connection with an interior of the retention groove, and a starting pipe arranged at a rear end of the starting block; a rear end of the starting pipe is connected with a jacking pipe; an upper end of the jacking pipe is connected with the linking rod; and an elastic piece is arranged between the starting pipe and the retention groove.

[0018] As a preferred solution of the generator protection apparatus with over-voltage protection described in the present invention, where a pressure relief hole is formed in the upper end of the heat dissipation pipeline; an inclined surface is arranged at a lower end of the starting block; a groove is formed in the inclined surface, and provided with a starting ball inside; a plurality of via holes are formed in a side wall of the starting block; and a clearing piece is arranged at the upper end of the heat dissipation pipeline.

[0019] As a preferred solution of the generator protection apparatus with over-voltage 4

BL-5709 protection described in the present invention, where the clearing piece includes a LUS04578 transverse plate arranged in the heat dissipation pipeline and a venthole formed in the transverse plate; and the venthole is provided with a surrounding barrel.

[0020] The present invention has the beneficial effects that during pressure relief of the present invention, it can ensure that an upward movement process of the starting block 1s not affected, and completed rapidly (so as to adapt to rapid expansion of air pressure and reduce a risk); and meanwhile, it can also ensure that a reset process of the starting block is completed slowly, so as to prevent a risk of frequent high-frequency arcs within a short time. Therefore, a starting time of the starting block and a time period for pressure relief are prolonged, and the generator protection apparatus is safer.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0021] In order to describe the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show only some embodiments of the present invention, and those of ordinary skill in the art may still derive other drawings from these drawings without any creative efforts. where:

[0022] FIG. 1 is a schematic diagram of an overall structure of a generator protection apparatus with over-voltage protection of the present invention;

[0023] FIG. 2 is a schematic sectional diagram of a structure of a buffer piece of a generator protection apparatus with over-voltage protection of the present invention;

[0024] FIG. 3 is an exploded view of a structure of a mounting piece of a generator protection apparatus with over-voltage protection of the present invention;

[0025] FIG. 4 is a schematic diagram of an interior structure of a protected object of

BL-5709 a generator protection apparatus with over-voltage protection of the present invention; LUS04578

[0026] FIG. 5 is a schematic sectional diagram of a structure of a starting piece of a generator protection apparatus with over-voltage protection of the present invention; and

[0027] FIG. 6 is a mounting schematic diagram of a slip rack of a generator protection apparatus with over-voltage protection of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0028] In order to make the aforementioned purposes, features and advantages of the present invention more apparent and comprehensible, detailed descriptions of specific implementations of the present invention are provided below in conjunction with the appended drawings of the specification.

[0029] While the following description provides numerous specific details to fully comprehend the present invention, the present invention may also be implemented in ways other than those described here. Those skilled in the art can carry out similar promotions without deviating from the connotation of the present invention, and therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiments" used herein refers to a particular feature, structure, or characteristic that may be incorporated into at least one implementation of the present invention. The term "in one embodiment" appearing at different positions in this specification does not necessarily refer to the same embodiment, nor is it solely or selectively exclusive with other embodiments in a mutual way.

[0031] Thirdly, the present invention is described in detail in conjunction with 6

BL-5709 illustrations. When the embodiments of the present invention are described in detail, LUS04578 for ease of description, sectional views of the device structures are partially enlarged without being drawn to scale. The illustrations are merely exemplary and should not limit the protection scope of the present invention. In addition, it is important to consider the three-dimensional spatial dimensions of length, width, and depth in actual production.

[0032] Embodiment 1

[0033] Referring to FIGs. 1-6, the present invention discloses a generator protection apparatus with over-voltage protection, including a shell assembly 100. In this embodiment, the shell assembly 100 includes a shell 101; a protective shell 102 is arranged in the shell 101; a gap is formed between the protective shell 102 and the shell 101, and provided with a buffer component 103 inside; the shell 101 serves as an external shell for protecting a whole generator; the protective shell 102 adds protection to the generator; and meanwhile, the buffer component 103 is used for damping and buffering the internal generator.

[0034] Further, in this embodiment, the buffer component 103 includes an abutment plate 103a arranged on an inner side surface of the shell 101; the abutment plate 103a is connected with an inner surface ofthe shell 101 through a bolt, and in oder to increase a contact area, the abutment plate 103a is in a disk shape; the abutment plate 103a is directly connected with a buffer rod 103b; a buffer barrel 103c is arranged on an outer surface of the protective shell 102, and provided with a buffer solution inside; one end, away from the buffer plate 103a, of the buffer rod 103b extends into the buffer barrel 103c; a buffer plate 103d 1s arranged at one end, extending into the buffer barrel 103c, of the buffer rod 103b; an outer wall of the buffer plate 103d is always abutted to an inner wall of the buffer barrel 103c; the buffer plate 103d may move along with 7

BL-5709 movement of the buffer rod 103b, and is provided with a through hole 103e at the same LUS04578 time; an end cover 203 1s arranged at an upper end of the buffer barrel 103c; a sliding hole 204 allowing the buffer rod 103b to slip is formed in the end cover 203; and the sliding hole 204 is provided with a sealing ring inside. In a case that the shell 101 is impacted or shaken, the shell 101 may push the buffer rod 103b, to make the buffer plate 103d at a lower end of the buffer rod 103b to slip in the buffer barrel 103c; and due to existence of the through hole 103e, the solution may pass through the through hole 103e, but large resistance of the solution itself may slow down the movement of the buffer plate 103d.

[0035] Further, the present invention further includes a protective assembly 200. In this embodiment, the protective assembly 200 includes a circuit breaking piece 201 arranged in the protective shell 102. The circuit breaking piece 201 may break a circuit if a voltage continuously rises, so as to prevent a damage on the generator. Meanwhile, the circuit breaking piece 201 is provided with a fuse piece 202, and a specially-made current commutation fuse is connected in parallel with two sides of the circuit breaking piece 201. After a switch is broken, a low arc voltage is established to transfer an excitation current into a fuse. A predetermined high voltage generated after the fuse is melted breaks through zinc oxide, and magnetic field energy is transferred into a zinc oxide varistor to be attenuated, and rapid demagnetization is achieved. The heat dissipation piece is arranged in the protective shell 102, and includes a plurality of heat dissipation holes formed in the protective shell 102.

[0036] In this embodiment, the circuit breaking piece 201 includes a mounting shell directly connected with the generator, and an air switch 201b arranged in the mounting shell. The air switch 201b is connected to the circuit for breaking, and the mounting groove is formed in the mounting shell at the same time. The air switch 201b is arranged 8

BL-5709 in the mounting groove, and electrically connected with the generator. LUS04578

[0037] Preferably, the mounting groove 1s provided with a mounting piece 300 inside.

In this embodiment, the mounting piece 300 includes a pullup rod 301 arranged in the mounting groove; the pullup rod 301 is arranged at an upper end of the air switch 201b; a rear end of the pullup rod 301 is connected with a linking rod 303; a lower end, away from the grasping jaw 302, of the linking rod 303 is bended downward, and connected with the heat dissipation assembly 400; an included angle between the pullup rod and the linking rod 303 is 90°; and a grasping jaw 302 is arranged at a lower end of the pullup rod 301. The grasping jaw 302 is used for grasping the air switch 201b, and pulls out the air switch 201b if necessary, so as to prevent normal use of the air switch 201b from being destroyed or affected due to a too high temperature.

[0038] Further, a rotating disk 304 is arranged at the lower end of the pullup rod 301; a rotating plane of the rotating disk 304 is horizontally arranged; and the rotating disk 304 is in a disk shape. Meanwhile, the rotating disk 304 is provided with a drive guide rail 305 which is in a spiral shape and unscrewed spirally. Mating teeth 306, in a stripe shape, matched with the drive guide rail 305 are arranged at a lower end of the grasping jaw 302, and arranged along a lower surface of the grasping jaw 302 at an equal interval.

[0039] Preferably, engaging teeth 307 are arranged at a lower end of the rotating disk 304, and arranged in a direction perpendicular to a lower surface of the rotating disk 304 and along a circular circumference of the rotating disk 304. A rotating rod 308 is rotationally connected with an interior of the mounting groove; and a rotating plane of the rotating rod 308 is perpendicular to a bottom surface of the rotating disk 304. A rotating gear 309 engaged with the engaging teeth 307 is arranged at an end part of the rotating rod 308. When rotating, the rotating rod 308 may drive the engaging teeth 307 to rotate through the rotating gear 309, which in turn makes the rotating disk 304 rotate. 9

BL-5709

[0040] Preferably, the mounting groove is provided with an extension block; a LUS04578 dovetail groove is formed in the extension block; and a dovetail bar matched with the dovetail groove is arranged at a lower end of each grasping jaw 302, so that the grasping jaw 302 always moves in a length direction of the dovetail groove.

[0041] Further, the present invention further includes a heat dissipation assembly 400.

In this embodiment, the heat dissipation assembly 400 includes a heat dissipation grid 401 arranged in the protective shell 102; the heat dissipation grid 401 is arranged close to the generator; and a mounting piece 300 is further arranged at a lower end of the heat dissipation grid 401 for bolt connection with an outer frame of the generator, so that the heat dissipation grid 401 always keeps fitting to the generator, and can dissipate heat produced by the generator outward.

[0042] Preferably, the heat dissipation grid 401 is provided with a heat dissipation pipeline 402; a cooling fan 403 is arranged at a lower end of the heat dissipation pipeline 402, connected with the heat dissipation grid 401, and provided with a power line; the generator is provided with a central control module; and the central control module is a single-chip microcomputer, and used for transferring a simple signal. In a case that a temperature of the generator changes sharply, the central control module transmits the signal to the cooling fan 403; and at this time, the cooling fan 403 rotates to accelerate heat dissipation.

[0043] Further, a covering case 404, in a frustum cone like shape, is arranged at a lower end of the heat dissipation pipeline 402; a cavity is formed in the covering case 404, so as to collect wind blow from the cooling fan 403; and meanwhile, a connecting piece is arranged between the cooling fan 403 and the heat dissipation grid 401.

[0044] In this embodiment, the connecting piece includes four rotating rods 308, with two in one group, rotationally connected with two sides of the cooling fan respectively;

BL-5709 meanwhile, a bending rod is connected between the rotating rods 308 on one side of the LUS04578 cooling fan, and connects the two rotating rods 308 with each other, and then a middle section of the bending rod may be bended and protrude; and meanwhile, a torsion spring is arranged at a rear end of each rotating rod 308, and used for making the bending rod always rotate in a direction close to the cooling fan 403.

[0045] When the cooling fan 403 is mounted, an operator opens the bending rod, to make the cooling fan 403 leaned on the heat dissipation grid 401; and then the bending rod is put down, and the torsion spring is used to make the bending rod stuck on a side wall of the heat dissipation grid 401 to complete mounting.

[0046] Further, an upper end of the heat dissipation pipeline 402 is connected with a starting piece 405. In this embodiment, the starting piece 405 includes a connecting block 405a connected with the heat dissipation pipeline 402, and a retention groove 405b formed in the connecting block 405a; a mouth at a lower end of the retention groove 405b is smaller than a width of a middle body of the retention groove 405b; a starting block 405c is in slippable connection with an interior of the retention groove 405b; a side wall of the starting block 405c is abutted to a side wall of the retention groove 405b; a starting pipe 405d is arranged at a rear end of the starting block 405c; a rear end of the starting pipe 405d is connected with a jacking pipe 406; an upper end of the jacking pipe 406 is connected with the linking rod 303; and an elastic piece 407 is arranged between the starting pipe 405d and the retention groove 405b. In this embodiment, the elastic piece 407 is a spring, and can always push the starting block 405c to the mouth at the lower end of the retention groove 405b.

[0047] Further, a pressure relief hole 500 is formed in the upper end of the heat dissipation pipeline 402; an inclined surface 501 is arranged at a lower end of the starting block 405c; a groove 502 is formed in the inclined surface 501, and provided 11

BL-5709 with a starting ball 503 inside; a plurality of via holes 504 are formed in a side wall of LUS04578 the starting block 405c; and meanwhile, a clearing piece 600 is arranged at the upper end of the heat dissipation pipeline 402.

[0048] In this embodiment, the clearing piece 600 includes a transverse plate 601 arranged in the heat dissipation pipeline 402 and a venthole 602 formed in the transverse plate 601; and the venthole 602 is provided with a surrounding barrel 603.

[0049] An operation process is as follows: when the generator is overheated, the cooling fan may receive a signal at this time and then starts to blow out hot air upward.

At this time, the starting block 405c and the starting ball 503 may be pushed to move together. At this time, overheated air may move upward from the via hole 504 and moves into a space formed by the starting block 405¢ and the upper end of the heat dissipation pipeline 402; and heat and air are excluded outward through the pressure relief hole 500, which in turn pushes the starting block 405c upward, so that the linking rod 303 is driven to move upward, and then the grasping jaw 302 may grasp the air switch 201b. When a heat rejection operation is completed, the cooling fan is closed; and at this time, the starting ball 503 falls rapidly and blocks the venthole 602. At this time, air can only be sent out through the pressure relief hole 600, and air remaining between the inclined surface 501 and the heat dissipation pipeline 402 can only slowly move upward through the via hole 504 with a small inside diameter, so that the starting block 405¢ moves down very slowly.

[0050] During pressure relief of the present invention, it can ensure that an upward movement process of the starting block 405c is not affected, and completed rapidly (so as to adapt to rapid expansion of air pressure and reduce a risk); and meanwhile, it can also ensure that a reset process of the starting block 405¢ is completed slowly, so as to prevent a risk of frequent high-frequency arcs within a short time. Therefore, a starting 12

BL-5709 time of the starting block 405c and a time period for pressure relief are prolonged, and LUS04578 the generator protection apparatus 1s safer.

[0051] Importantly, it should be noted that construction and layout of the present application shown in several different exemplary implementations are exemplary only.

Although only a few implementations are described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications (e.g., sizes, dimensions, structures, shapes and proportions of various elements, as well as parameter values (e.g., temperatures, pressures, etc. ), mounting layout, use of materials, colors, directional changes, etc.) are possible without substantially departing from novel teachings and advantages of the subject described in the present application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the positions of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative implementations. In the claims, any “means-plus-function” clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents, but also equivalent structures. Other substitutions, modifications, variations, and omissions may be made in the design, operating conditions, and arrangement of the exemplary implementations without departing from the scope of the present invention. Therefore, the present invention is not limited to the particular implementations, but will be expanded to still fall within the scope of the appended claims.

[0052] In addition, in an effort to provide a concise description of these exemplary implementations, all features of an actual implementation may not be described (i.e., 13

BL-5709 those unrelated to the presently contemplated best mode of carrying out the present LUS04578 invention, or those unrelated to implementing the present invention).

[0053] It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation specific decisions may be made. Such a development effort may be complex and time consuming, but would nevertheless be a routine undertaking of design, manufacture, and production for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

[0054] It should be noted that the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit it. Although the preferred embodiments have made detailed description to the present invention, those skilled in the art should understand that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from its spirit and scope, which are all within the scope of the claims of the present invention. 14

Claims

BL-5709 What is claimed is: LU504578

1. A generator protection apparatus with over-voltage protection comprises a shell assembly (100), comprising a shell (101), a protective shell (102) arranged in the shell (101) and a buffer component (103) arranged between the protective shell (102) and the shell (101); a protective assembly (200), comprising a circuit breaking piece (201) arranged in the protective shell (102), a fuse piece (202) arranged on the circuit breaking piece (201) and a heat dissipation piece arranged in the protective shell (102); and a heat dissipation assembly (400) arranged in the protective shell (102).

2. The generator protection apparatus with over-voltage protection according to claim 1, characterized in that the buffer component (103) comprises an abutment plate (103a) arranged on an inner side surface of the shell (101), a buffer rod (103b) arranged on the abutment plate (103a) and a buffer barrel (103c) arranged on the protective shell (102); the buffer barrel (103c) is provided with a buffer solution inside; a buffer plate (103d) is arranged at one end, extending into the buffer barrel (103c), of the buffer rod (103b); and a through hole (103e) is formed in the buffer plate (103d).

3. The generator protection apparatus with over-voltage protection according to claim 2, characterized in that an end cover (203) is arranged at an upper end of the buffer barrel (103c); a sliding hole (204) allowing the buffer rod (103b) to slip is formed in the end cover (203); and the sliding hole (204) is provided with a sealing ring inside.

4. The generator protection apparatus with over-voltage protection according to claim 1, characterized in that the circuit breaking piece (201) comprises a mounting shell directly connected with a generator, and an air switch (201b) arranged in the mounting shell; a mounting groove is formed in the mounting shell; the air switch (201b) is arranged in the mounting groove, and electrically connected with the generator; and the mounting groove is provided with a mounting piece (300) inside.

BL-5709

5. The generator protection apparatus with over-voltage protection according to LUS04578 claim 4, characterized in that the mounting piece (300) comprises a pullup rod (301) arranged in the mounting groove, a grasping jaw (302) arranged at a lower end of the pullup rod (301) and a linking rod (303) connected with the pullup rod (301); and one end, away from the grasping jaw (302), of the linking rod (303) is bended downward, and connected with the heat dissipation assembly (400), wherein a rotating disk (304) is arranged at a lower end of the pullup rod (301), and provided with a drive guide rail (305); mating teeth (306) matched with the drive guide rail (305) are arranged at a lower end of the grasping jaw (302); engaging teeth (307) are arranged at a lower end of the rotating disk (304); a rotating rod (308) is rotationally connected with an interior of the mounting groove; and a rotating gear (309) engaged with the engaging teeth (307) is arranged at an end part of the rotating rod (308).

6. The generator protection apparatus with over-voltage protection according to claim 1 or 5, characterized in that the heat dissipation assembly (400) comprises a heat dissipation grid (401) arranged in the protective shell (102), a heat dissipation pipeline (402) arranged on the heat dissipation grid (401), and a cooling fan (403) arranged at a lower end of the heat dissipation pipeline (402); the cooling fan (403) is connected with the heat dissipation grid (401); a covering case (404) is arranged at a lower end of the heat dissipation pipeline (402); and a connecting piece is arranged between the cooling fan (403) and the heat dissipation grid (401).

7. The generator protection apparatus with over-voltage protection according to claim 6, characterized in that an upper end of the heat dissipation pipeline (402) is connected with a starting piece (405); the starting piece (405) comprises a connecting block (405a) connected with the heat dissipation pipeline (402), a retention groove (405b) formed in the connecting block (405a), a starting block (405c) in slippable 16

BL-5709 connection with an interior of the retention groove (405b), and a starting pipe (405d) LU504578 arranged at a rear end of the starting block (405c); a rear end of the starting pipe (405d) is connected with a jacking pipe (406); an upper end of the jacking pipe (406) is connected with the linking rod (303); and an elastic piece (407) is arranged between the starting pipe (405d) and the retention groove (405b).

8. The generator protection apparatus with over-voltage protection according to claim 7, characterized in that a pressure relief hole (500) is formed in the upper end of the heat dissipation pipeline (402); an inclined surface (501) 1s arranged at a lower end of the starting block (405c); a groove (502) is formed in the inclined surface (501), and provided with a starting ball (503) inside; a plurality of via holes (504) are formed in a side wall of the starting block (405c); and a clearing piece (600) is arranged at the upper end of the heat dissipation pipeline (402).

9. The generator protection apparatus with over-voltage protection according to claim 8, characterized in that the clearing piece (600) comprises a transverse plate (601) arranged in the heat dissipation pipeline (402) and a venthole (602) formed in the transverse plate (601); and the venthole (602) is provided with a surrounding barrel (603). 17