CN115118016A

CN115118016A - Low-frequency low-voltage load shedding protection system and auxiliary device under micro-grid environment

Info

Publication number: CN115118016A
Application number: CN202210885017.4A
Authority: CN
Inventors: 旷永红; 周细凤; 周鹏; 周颖鹏; 雷泽睿
Original assignee: Hunan Institute of Engineering
Current assignee: Hunan Institute of Engineering
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-09-27

Abstract

The invention relates to the technical field of micro-grids, and discloses a low-frequency and low-voltage load shedding protection system under a micro-grid environment, which comprises: little electric wire netting power module, little electric wire netting power module electric connection has monitoring module, monitoring module monitors little electric wire netting circuit voltage and frequency, monitoring module electric connection has the judgement module that is used for judging voltage and frequency, be provided with driving motor on the judgement module, judgement module can control the execution module and drive driving motor operation, is connected with the auxiliary device who is used for the control circuit break-make under the driving motor, and through closing the circuit of little electric wire netting part in proper order, the problem that the low pressure low frequency of preventing circuit leads to the consumer of connection to appear the damage has then guaranteed effectively little electric wire netting circuit equipment safety, can judge the place that goes wrong in the circuit fast through shutting down the circuit in proper order, reduces the step that artifical progressively overhauls, improves little electric wire netting's maintenance efficiency.

Description

Low-frequency low-voltage load shedding protection system and auxiliary device under micro-grid environment

Technical Field

The invention relates to the technical field of micro-grids, in particular to a low-frequency low-voltage load shedding protection system and an auxiliary device in a micro-grid environment.

Background

The microgrid is a small-sized power generation and distribution system formed by collecting a distributed power supply, an energy storage device, an energy conversion device and related load, monitoring and protection devices, is an autonomous system capable of realizing self control, protection and management, is used as a complete power system, realizes functions in the aspects of power balance control, system operation optimization, fault monitoring and protection, power quality management and the like by means of self control and management energy supply, and has the problems of low voltage and low frequency of the microgrid caused by poor contact, small fuse diameter, small capacitance, negative damping, electromagnetic inertia of a generator, nonlinear singular phenomenon of the power system and over-sensitive magnetic force regulation when the microgrid is powered on for use, and easily causes the condition that connected equipment cannot normally run after the problem of the low voltage and the low frequency occurs in a circuit, wherein the microgrid comprises power utilization equipment such as the generator, the motor and the like, and then lead to the unable normal operating of equipment of connecting the electric wire netting, when the problem of low pressure low frequency appears, the control circuit of current device can not realize automatic switch, and then can influence the quick adjustment of circuit, leads to the circuit low frequency problem can not obtain timely control, in order to prevent to cause the influence to other consumer that the electric wire netting is connected simultaneously, probably need shut down the electric wire netting and reduce the influence of low frequency low pressure to connected device in the little electric wire netting, finally can cause certain economic loss.

Therefore, a low-frequency low-voltage load shedding protection system and an auxiliary device under the micro-grid environment are provided.

Disclosure of Invention

The invention aims to provide a low-frequency low-voltage load shedding protection system and an auxiliary device in a micro-grid environment, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a low frequency, low voltage load shedding protection system in a microgrid environment, the protection system comprising: the micro-grid power supply module is electrically connected with a monitoring module, and the monitoring module monitors the voltage and the frequency of a micro-grid circuit;

the monitoring module is electrically connected with a judging module for judging voltage and frequency, and a driving motor is arranged on the judging module;

the judging module can control the execution module to drive the driving motor to operate, an auxiliary device for controlling the on-off of the circuit is connected below the driving motor, and the driving motor can carry out switching-off and switching-on work on the microgrid circuit through the auxiliary device;

three power utilization modules are arranged below the auxiliary device, and the auxiliary device can control the power on and power off of the power utilization modules.

The protection system comprises the following specific operation steps:

s1, connecting the microgrid power supply module to the start end of the microgrid power generation, connecting and starting the circuit, performing system initialization through the microgrid power supply module, and starting monitoring by the monitoring module whether the voltage and frequency in the power grid are within normal control parameters (U is 220V, f is 50 Hz);

s2, determining the voltage and frequency of the microgrid through the determination module, and if the voltage and frequency of the microgrid are within effective values of control parameters (U is 220V, f is 50Hz), continuously monitoring the voltage and frequency in the microgrid circuit in real time;

s3, judging the voltage and the frequency of the microgrid through a judging module, if the voltage and the frequency of the microgrid are not within the effective values of control parameters (U is 220V, f is 50Hz), controlling an executing module through the judging module to start a driving motor, driving an auxiliary device through the driving motor to sequentially close a control gate, and further sequentially closing the connection between a power utilization module and the microgrid;

s4, by sequentially disconnecting the power utilization modules from the microgrid, if the low-frequency and low-voltage phenomenon in the circuit disappears after a certain power utilization module is powered off, the module has the problem of low-frequency and low-voltage in the circuit, and at the moment, maintenance personnel are required to overhaul the power utilization modules with low voltage and low frequency in the microgrid, and the problems in the power utilization modules are maintained after the maintenance;

s5, continuing to monitor the voltage and frequency of the microgrid through the monitoring component, if the voltage and frequency of the microgrid are within the effective values of the control parameters (U220V, f 50Hz), controlling the execution component through the judgment component to reverse the driving motor, driving the auxiliary device through the driving motor to sequentially turn on the control gate, and further sequentially connecting the power utilization module to the power grid;

and S6, if the voltage and the frequency of the microgrid are not always within the effective value of the control parameter (U is 220V, f is 50Hz), the third power utilization module has the problem of low voltage and low frequency, and at the moment, a maintenance worker needs to overhaul the power utilization module with low voltage and low frequency in the microgrid, and then maintain the problem in the power utilization module after the maintenance.

An auxiliary device for low-frequency low-voltage load shedding protection in a microgrid environment comprises an electric box, wherein electric switches are fixedly mounted in the electric box, the number of the electric switches is three, the front sides of the three electric switches are respectively provided with a switch for controlling a microgrid circuit, a toggle assembly for toggling the switch is movably connected to the electric box, a toggle plate for toggling the switch is arranged on the toggle assembly, a limiting mechanism for fixing the toggle assembly is fixedly connected to the electric box, the limiting mechanism comprises a limiting assembly and a releasing assembly, a pushing assembly for pushing the releasing assembly is arranged in the electric box, a pushing block is movably connected to the pushing assembly, the pushing block is mutually matched with the first pushing groove in shape, a thread groove matched with a thread rod is formed in the pushing block, and a resetting assembly is arranged below the electric box, and the resetting component is provided with a lifting plate for pushing the shifting component to move upwards.

Preferably, stir the subassembly and include first spring, lifter and support the groove, first spring fixed connection is in the inboard of electronic box, the bottom fixedly connected with of first spring is used for driving the lifter of stirring the board up-and-down motion, lifter swing joint is in the inboard of electronic box, stir the board fixed connection at the outer wall of lifter, the bottom of lifter is offered and is used for prescribing a limit to the lifter and supports the groove.

Preferably, the limiting assembly comprises a fixed platen, a first movable groove, a gear, a limiting frame and a second spring, the fixed platen is fixedly connected inside the electric box, the first movable groove used for limiting the movement of the assembly is formed in the fixed platen, the gear is rotatably connected inside the first movable groove, the lower end of the limiting frame is movably connected inside the first movable groove, a tooth socket is formed in the lower end of the first movable groove, the tooth socket and the gear at the lower end of the first movable groove are meshed with each other, the top of the first movable groove is abutted against the inside of the abutting groove, one end of the second spring is fixedly connected inside the first movable groove, and the other end of the second spring is fixedly connected with the limiting frame.

Preferably, it includes first slurcam, first promotion groove, third spring, promotes frame, magnetic conduction piece and permanent magnet to remove the subassembly, first slurcam fixed connection is in the inboard of spacing, the outer wall of first slurcam runs through the first promotion groove of offering to be convenient for promote the piece and pass through, the one end fixed connection of third spring is in the inside of first slurcam, the other end of third spring and the inside fixed connection who promotes the frame, third spring swing joint is at the outer wall of first slurcam, magnetic conduction piece fixed connection is in the bottom of promoting the frame, permanent magnet fixed connection is in the inside of electronic box.

Preferably, promote the subassembly and include threaded rod, guide arm, first flexible groove, fourth spring and first flexible piece, the threaded rod rotates to be connected in the inside of electronic box, the outside of threaded rod and driving motor's output fixed connection, guide arm fixed connection promotes a threaded connection on the threaded rod in the inside of electronic box, the inboard movable sliding connection who promotes the piece is on the guide arm, first flexible groove is seted up in the inboard that promotes the piece, the one end fixed connection of fourth spring is in the inside of first flexible groove, the other end and the first flexible piece fixed connection of fourth spring, first flexible piece swing joint is in the inside of first flexible groove, the outer wall of first flexible piece sets up to the inclined plane.

Preferably, the reset assembly comprises a chute, a stabilizer bar, a fifth spring, a movable rod, a second telescopic groove, a sixth spring, a second telescopic block, a second pushing groove and a second pushing plate, the chute penetrates through the bottom of the electronic box, the stabilizer bar is fixedly connected inside the chute, one end of the fifth spring is fixedly connected inside the chute, the other end of the fifth spring is fixedly connected with the movable rod, the middle part of the movable rod is movably connected inside the chute, the second telescopic groove is arranged at the upper end of the movable rod, the bottom of the sixth spring is fixedly connected inside the second telescopic groove, the top of the sixth spring is fixedly connected with the second telescopic block for resetting pushing, the top of the second telescopic block is arranged as an inclined plane, the second pushing groove for contact resetting pushing is arranged inside the second telescopic block, the second pushing groove is provided with an inclined plane the same as the top of the second telescopic block, and the electronic box is fixedly connected with a second pushing plate used in cooperation with the second pushing groove.

Preferably, the reset assembly still includes third promotion groove, guide bar, fixed frame, chute, lifting groove, lifting piece and guide way, the third promotes the groove and runs through the bottom of seting up at the movable bar, the outside end swing joint of guide bar is in the inside of third promotion groove, fixed frame fixed connection is in the bottom of electronic box, the chute runs through the outer wall of seting up at fixed frame, the bank height of chute and the elevating height looks adaptation of lifter, the middle part swing joint of guide bar is in the inside of chute, the lifting groove runs through the both sides of seting up at fixed frame, lifting piece swing joint is in the inside of lifting groove, the guide way that is used for the guide bar direction is seted up to the outer wall of lifting piece, the medial extremity swing joint of guide bar is in the inside of guide way, lifting board fixed connection is at the outer wall of lifting piece.

Compared with the prior art, the invention has the beneficial effects that:

1. the limiting frame cannot abut against the abutting groove, the lifting rod moves downwards on the electric box under the action of extension of the first spring at the moment, the lifting rod drives the shifting plate to move downwards, the shifting plate drives the switch to move downwards at the moment, the switch moves downwards at the moment so that the electric brake is closed, and circuits of the micro-grid part are closed in sequence, so that the problem that the connected electric equipment is damaged due to low voltage and low frequency of the circuits is solved, the safety of the equipment on the micro-grid circuit is effectively guaranteed, the problem in the circuits can be quickly judged by closing the circuits in sequence, the steps of manual gradual maintenance are reduced, and the maintenance efficiency of the micro-grid is improved;

2. the limiting frame is polymerized under the action of the second spring, the inner side of the upper end of the limiting frame is mutually abutted with the outer wall of the lifting rod, and meanwhile, the threaded rod drives the pushing block to continuously move inwards, so that the switches on the electric brake can be closed in sequence, and the problem of influence on daily life of people caused by the stop of all equipment can be solved;

3. the lifting rod moves upwards and compresses the first spring in the process of upward movement of the lifting plate, and the lifting rod drives the stirring plate to move upwards so as to automatically recover the circuit of the microgrid, so that the function of automatically recovering power is realized, the steps of manually opening the brake are effectively reduced, and the problem of increased loss caused by equipment production due to the fact that the circuit of the microgrid cannot be electrified for a long time is solved;

4. after the lifting rod moves to the highest position, the abutting groove can be abutted against the limiting frame at the moment, the initial state of the shifting assembly can be recovered, the follow-up control of the equipment on the circuit can be achieved, and the low-voltage low-frequency protection in the circuit can be prevented for a long time.

Drawings

FIG. 1 is a block diagram of the low voltage and low frequency protection system of the present invention;

FIG. 2 is a block diagram of a microgrid module circuit connection according to the present invention;

FIG. 3 is a perspective view of the overall structure of the present invention;

FIG. 4 is a perspective view of the internal structure of the toggle assembly and the limiting assembly of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4 according to the present invention;

FIG. 6 is a perspective view of the interior of the release assembly of the present invention;

FIG. 7 is a perspective view of the internal structure of the lift assembly of the present invention;

FIG. 8 is an enlarged view of the structure at B in FIG. 7 according to the present invention;

FIG. 9 is an enlarged view of the structure of FIG. 7 at C according to the present invention;

FIG. 10 is a perspective view of the inner structure of the pushing assembly of the present invention;

fig. 11 is an enlarged view of the structure at D in fig. 10 according to the present invention.

In the figure:

1. an electric box; 2. an electric brake; 3. a switch; 4. a first spring; 5. a lifting rod; 6. a poking plate; 7. a butting groove; 8. fixing the bedplate; 9. a first movable slot; 10. a gear; 11. a limiting frame; 12. a second spring; 13. a first push plate; 14. a first push slot; 15. a third spring; 16. a pushing frame; 17. a magnetic conduction block; 18. a permanent magnet; 19. a threaded rod; 20. a guide bar; 21. a pushing block; 22. a first telescopic slot; 23. a fourth spring; 24. a first telescopic block; 25. a chute; 26. a stabilizer bar; 27. a fifth spring; 28. a movable rod; 29. a second telescopic slot; 30. a sixth spring; 31. a second telescopic block; 32. a second push groove; 33. a second pusher plate; 34. a third push slot; 35. a guide bar; 36. a fixing frame; 37. a chute; 38. a lifting groove; 39. lifting the block; 40. a guide groove; 41. and (5) lifting the plate.

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.

Referring to fig. 1 to 11, the present invention provides a technical solution:

example one

Referring to fig. 1 and fig. 2, a low-frequency and low-voltage load shedding protection system in a microgrid environment includes: the micro-grid power supply module is electrically connected with a monitoring module, and the monitoring module monitors the voltage and the frequency of a micro-grid circuit;

The protection system comprises the following specific operation steps:

s6, if the voltage and frequency of the microgrid are not within the effective value of the control parameter (U is 220V, f is 50Hz), the third power consumption module has a low-voltage low-frequency problem, and a maintenance person is required to repair the power consumption module having a low-voltage low-frequency in the microgrid, and then repair the problem in the power consumption module after the maintenance.

Example two

Referring to fig. 3 and fig. 11, an auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment comprises an electrical box 1, three electrical brakes 2 are fixedly installed inside the electrical box 1, the number of the electrical brakes 2 is three, the front sides of the three electrical brakes 2 are respectively provided with a switch 3 for controlling a microgrid circuit, a toggle assembly for toggling the switch 3 is movably connected to the electrical box 1, a toggle plate 6 for toggling the switch 3 is arranged on the toggle assembly, a limiting mechanism for fixing the toggle assembly is fixedly connected to the electrical box 1, the limiting mechanism comprises a limiting assembly and a releasing assembly, a pushing assembly for pushing the releasing assembly is arranged inside the electrical box 1, a pushing block 21 is movably connected to the pushing assembly, the shape of the pushing block 21 is mutually matched with that of a first pushing groove 14, a thread groove matched with a thread rod 19 is arranged inside the pushing block 21, a resetting assembly is arranged under the electrical box 1, the reset assembly is provided with a lifting plate 41 for pushing the toggle assembly to move upwards.

The working principle is as follows: during the use, drive the promotion subassembly through control driving motor and promote and remove the subassembly motion, it drives the unable restriction of restriction subassembly and stirs the subassembly to remove the subassembly, the swing subassembly drives and dials movable plate 6 downstream, dial movable plate 6 and drive switch 3 and down rotate and then close electric brake 2 in proper order, after circuit voltage and frequency reach the normal value, driving motor reverse drive at this moment promotes the subassembly and promotes and resume the subassembly motion, the subassembly is duplicated at this moment and drives and stir the subassembly and upwards move, stir subassembly and drive and dial movable plate 6 upward movement, dial movable plate 6 and drive switch 3 and upwards rotate and then open electric brake 2 in proper order, and then can accomplish the protection to little electric wire netting circuit effectively.

EXAMPLE III

Referring to fig. 4, 5, 9, 10 and 11, the limiting assembly includes a fixed platen 8, a first movable groove 9, a gear 10, a limiting frame 11 and a second spring 12, the fixed platen 8 is fixedly connected inside the electronic box 1, the first movable groove 9 for limiting the movement of the assembly is provided inside the fixed platen 8, the gear 10 is rotatably connected inside the first movable groove 9, the lower end of the limiting frame 11 is movably connected inside the first movable groove 9, the lower end of the first movable groove 9 is provided with a tooth socket, the tooth socket at the lower end of the first movable groove 9 is meshed with the gear 10, the top of the first movable groove 9 is abutted against the inside of the abutting groove 7, one end of the second spring 12 is fixedly connected inside the first movable groove 9, and the other end of the second spring 12 is fixedly connected with the limiting frame 11.

Remove the subassembly and include first slurcam 13, first promotion groove 14, third spring 15, pushing away frame 16, magnetic conduction piece 17 and permanent magnet 18, first slurcam 13 fixed connection is in the inboard of spacing 11, the outer wall of first slurcam 13 runs through the first promotion groove 14 of offering the pushing away piece 21 of being convenient for and passing through, the one end fixed connection of third spring 15 is in the inside of first slurcam 13, the other end of third spring 15 and the inside fixed connection who promotes frame 16, third spring 15 swing joint is at the outer wall of first slurcam 13, magnetic conduction piece 17 fixed connection is in the bottom that pushes away frame 16, permanent magnet 18 fixed connection is in the inside of electronic box 1.

The promotion subassembly includes threaded rod 19, guide arm 20, first flexible groove 22, fourth spring 23 and first flexible piece 24, threaded rod 19 rotates the inside of connecting at electronic box 1, the outside of threaded rod 19 and driving motor's output fixed connection, guide arm 20 fixed connection is in electronic box 1's inside, promote piece 21 threaded connection on threaded rod 19, the inboard movable sliding connection who promotes piece 21 is on guide arm 20, first flexible groove 22 is seted up in the inboard that promotes piece 21, the one end fixed connection of fourth spring 23 is in the inside of first flexible groove 22, the other end and the 24 fixed connection of first flexible piece of

fourth spring

23, 24 swing joint of first flexible piece are in the inside of first flexible groove 22, the outer wall of first flexible piece 24 sets up to the inclined plane.

The local working principle is as follows: when the device is used, the driving motor is controlled to drive the threaded rod 19 to rotate, the threaded rod 19 drives the pushing block 21 connected with the threads to move on the guide rod 20, when the bottom of the pushing block 21 is abutted against the top of the second telescopic block 31, the pushing block 21 pushes the second telescopic block 31 to move downwards in the second telescopic groove 29 and compress the sixth spring 30, when the pushing block 21 drives the first telescopic block 24 to be abutted against the pushing frame 16, the first telescopic block 24 pushes the first pushing plate 13 to move inwards integrally through the pushing block 21, the first pushing plate 13 drives the lower end of the limiting frame 11 to move to one side in the first movable groove 9 and compress the second spring 12, because the bottom of the limiting frame 11 is meshed with the gear 10, the limiting frame 11 on one side moves outwards through the gear 10, the tops of the two limiting frames 11 move to two sides in the abutting groove 7, spacing 11 can't with support the mutual butt in groove 7 this moment, and then make lifter 5 downstream on electronic box 1 under the effect that first spring 4 extends this moment, lifter 5 drives 6 downstream of stirring board, stirring board 6 drives switch 3 downstream this moment, switch 3 downstream makes electric brake 2 close this moment, and then can make the circuit of little electric wire netting part close, the problem of the equipment that the low pressure low frequency of preventing the circuit leads to appears damaging, and then guaranteed the safety of the equipment on little electric wire netting circuit effectively, and then can reduce the loss of the producer that leads to because of equipment damage.

Example four

Referring to fig. 7 to 9, the reset assembly includes a sliding slot 25, a stabilizer bar 26, a fifth spring 27, a movable rod 28, a second telescopic slot 29, a sixth spring 30, a second telescopic block 31, a second push slot 32 and a second push plate 33, the sliding slot 25 penetrates through the bottom of the electronic box 1, the stabilizer bar 26 is fixedly connected inside the sliding slot 25, one end of the fifth spring 27 is fixedly connected inside the sliding slot 25, the other end of the fifth spring 27 is fixedly connected with the movable rod 28, the middle of the movable rod 28 is movably connected inside the sliding slot 25, the second telescopic slot 29 is arranged at the upper end of the movable rod 28, the bottom of the sixth spring 30 is fixedly connected inside the second telescopic slot 29, the top of the sixth spring 30 is fixedly connected with a second telescopic block 31 for resetting and pushing, the top of the second telescopic block 31 is provided with an inclined surface, the second push slot 32 for contact resetting and pushing is arranged inside the second telescopic block 31, the second pushing groove 32 is provided with an inclined surface the same as the top of the second telescopic block 31, and the electrical box 1 is fixedly connected with a second pushing plate 33 used for being matched with the second pushing groove 32.

The reset assembly further comprises a third pushing groove 34, a guide rod 35, a fixed frame 36, a chute 37, a lifting groove 38, a lifting block 39 and a guide groove 40, the third pushing groove 34 penetrates through the bottom of the movable rod 28, the outer side end of the guide rod 35 is movably connected inside the third pushing groove 34, the fixed frame 36 is fixedly connected to the bottom of the electric box 1, the chute 37 penetrates through the outer wall of the fixed frame 36, the inclined height of the chute 37 is matched with the lifting height of the lifting rod 5, the middle part of the guide rod 35 is movably connected inside the chute 37, the lifting groove 38 penetrates through the two sides of the fixed frame 36, the lifting block 39 is movably connected inside the lifting groove 38, the guide groove 40 used for guiding the guide rod 35 is formed in the outer wall of the lifting block 39, the inner side end of the guide rod 35 is movably connected inside the guide groove 40, and the lifting plate 41 is fixedly connected to the outer wall of the lifting block 39.

The local working principle is as follows: when the lifting device is used, the driving motor is controlled to drive the threaded rod 19 to rotate reversely, the threaded rod 19 drives the pushing block 21 to move reversely on the guide rod 20, the pushing block 21 drives the first telescopic block 24 to contact with the pushing frame 16, because the outer wall of the first telescopic block 24 is set to be an inclined surface, at this time, after the inclined surface on the first telescopic block 24 contacts with the pushing frame 16, the first telescopic block 24 can move towards the inside of the first telescopic groove 22 and compress the fourth spring 23, when the pushing block 21 passes through the inside of the first pushing groove 14, the bottom of the pushing block 21 can abut against the upper end of the second telescopic block 31, in the moving process of the pushing block 21, the second telescopic block 31 can drive the movable rod 28 to move in the sliding groove 25 and compress the fifth spring 27, the movable rod 28 drives the guide rod 35 to move upwards in the chute 37 through the third pushing groove 34, the guide rod 35 drives the lifting block 39 to move upwards in the lifting groove 38 through the guide groove 40, meanwhile, the lifting block 39 drives the guide groove 40 to move upwards, at the moment, because the lifting rod 5 is already at the lowest position and the bottom of the lifting rod is abutted against the lifting plate 41, the lifting plate 41 enables the lifting rod 5 to move upwards and compress the first spring 4 in the upward movement process, the lifting rod 5 drives the poking plate 6 to move upwards so as to automatically recover the circuit of the microgrid, thereby realizing the function of automatically recovering the electric power, effectively reducing the step of manually opening the brake, preventing the problem of loss increase caused by equipment production due to the fact that the power circuit cannot be electrified for a long time, after the lifting rod 5 moves to the highest position, the abutting groove 7 is abutted against the limiting frame 11 at the moment so as to recover the initial state of the poking assembly, further enabling the equipment to control the circuit subsequently, preventing the low-voltage frequency protection of the circuit for a long time, and when the pushing block 21 drives the second telescopic block 31 to move to one side of the second pushing plate 33, when the second pushing groove 32 inside the second telescopic block 31 abuts against the second pushing plate 33, at this time, the second pushing plate 33 drives the second telescopic block 31 to move downward inside the second telescopic groove 29 through the second pushing groove 32 and compress the sixth spring 30 to move downward, so that the pushing block 21 cannot abut against the second telescopic block 31, at this time, the movable rod 28 moves to the initial position under the action of the extension of the fifth spring 27, and at this time, the lifting plate 41 moves to the lowest position.

The general working principle is as follows:

in an initial state, the limiting frame 11 is in a closed state under the action of extension of the second spring 12, at the moment, the lifting rod 5 is in a highest position in abutting connection with the top of the limiting frame 11 through the abutting groove 7, the lifting rod 5 upwards compresses the first spring 4, the pushing frame 16 is in the outermost side through extension of the third spring 15, the sixth spring 30 extends to enable the second telescopic block 31 to be in the highest position of the second telescopic groove 29, the fifth spring 27 extends to enable the movable rod 28 to drive the guide rod 35 to be in the lowest position of the inclined groove 37 through the third pushing groove 34, the guide rod 35 drives the lifting block 39 to be in the lowest position of the movable rod 28 through the guide groove 40, and the lifting block 39 drives the lifting plate 41 to be in the lowest position.

When the micro-grid circuit works, when the circuit of the micro-grid has the problem of low voltage and low frequency, the threaded rod 19 is driven to rotate by controlling the driving motor, the threaded rod 19 drives the pushing block 21 connected with the threads to move on the guide rod 20, when the bottom of the pushing block 21 is abutted against the top of the second telescopic block 31, the pushing block 21 pushes the second telescopic block 31 to move downwards in the second telescopic groove 29 and compress the sixth spring 30, when the pushing block 21 drives the first telescopic block 24 to be abutted against the pushing frame 16, the first telescopic block 24 pushes the first pushing plate 13 to move inwards integrally through the pushing block 21, the first pushing plate 13 drives the lower end of the limiting frame 11 to move towards one side in the first movable groove 9 and compress the second spring 12, because the bottom of the limiting frame 11 is meshed with the gear 10, the limiting frame 11 on one side makes the limiting frame 11 on the other side move outwards through the gear 10, the tops of the two limiting frames 11 move towards two sides in the abutting groove 7, at the moment, the limiting frames 11 cannot be abutted against the abutting groove 7, the lifting rod 5 moves downwards on the electric box 1 under the action of the extension of the first spring 4, the lifting rod 5 drives the poking plate 6 to move downwards, the poking plate 6 drives the switch 3 to move downwards, the switch 3 moves downwards to close the electric brake 2, the circuit of the microgrid part can be closed, the problem that the equipment is damaged due to low voltage and low frequency of the circuit is solved, the safety of the equipment on the microgrid circuit is effectively guaranteed, and the loss of manufacturers due to equipment damage can be reduced;

at this time, when the pushing block 21 pushes the magnetic conduction block 17 to move to the position opposite to the permanent magnet 18, at this time, the permanent magnet 18 attracts the magnetic conduction block 17 to move towards the inner side of the electric box 1, and at the same time, the magnetic conduction block 17 drives the pushing frame 16 to move inwards on the outer wall of the first pushing plate 13 and compress the third spring 15, at this time, because the first telescopic block 24 cannot abut against the pushing frame 16 after the pushing frame 16 moves inwards, the pushing block 21 further penetrates through the first pushing groove 14, at this time, the first telescopic block 24 cannot push the releasing component, so that the limiting frame 11 is polymerized under the action of the second spring 12, the inner side of the upper end of the limiting frame 11 abuts against the outer wall of the lifting rod 5, and meanwhile, the pushing block 21 is driven by the threaded rod 19 to move inwards continuously, the switches 3 on the electric brake 2 can be closed in sequence, and all devices connected with the microgrid due to one-time of stopping the circuit can be prevented from stopping from running, the problem of influence on the daily life of people caused by the stop of the operation of all equipment can be further reduced;

when the voltage and the frequency of the microgrid circuit reach normal values, the driving motor is controlled to drive the threaded rod 19 to rotate reversely at the moment, the threaded rod 19 drives the pushing block 21 to move reversely on the guide rod 20, the pushing block 21 drives the first telescopic block 24 to contact with the pushing frame 16, because the outer wall of the first telescopic block 24 is set to be an inclined surface, the inclined surface on the first telescopic block 24 is contacted with the pushing frame 16 at the moment to enable the first telescopic block 24 to move towards the inside of the first telescopic groove 22 and compress the fourth spring 23, when the pushing block 21 passes through the inside of the first pushing groove 14, the bottom of the pushing block 21 is abutted against the upper end of the second telescopic block 31, the second telescopic block 31 drives the movable rod 28 to move in the sliding groove 25 and compress the fifth spring 27 in the moving process of the pushing block 21, the movable rod 28 drives the guide rod 35 to move upwards in the chute 37 through the third pushing groove 34, the guide rod 35 drives the lifting block 39 to move upwards in the lifting groove 38 through the guide groove 40, meanwhile, the lifting block 39 drives the guide groove 40 to move upwards, at the moment, because the lifting rod 5 is already at the lowest position and the bottom of the lifting rod is abutted against the lifting plate 41, the lifting plate 41 enables the lifting rod 5 to move upwards and compress the first spring 4 in the process of moving upwards, the lifting rod 5 drives the poking plate 6 to move upwards so as to automatically recover the circuit of the microgrid, thereby realizing the function of automatically recovering electric power, effectively reducing the steps of manual switching-off, preventing the problem of loss increase caused by the fact that the power grid circuit cannot be electrified for a long time, and after the lifting rod 5 moves to the highest position, the abutting groove 7 is abutted against the limiting frame 11 at the moment, further recovering the initial state of the poking assembly, and further enabling the subsequent control of the circuit by the equipment, can prevent the protection of low pressure low frequency in the circuit for a long time, when pushing away piece 21 and drive second flexible piece 31 and move to one side of second pushing plate 33, when the inside second of second flexible piece 31 promotes groove 32 and second pushing plate 33 and butt each other, second pushing plate 33 can drive second flexible piece 31 through second pushing groove 32 and move down in the inside of second flexible groove 29 and compress sixth spring 30 downstream this moment, and then make and promote piece 21 and second flexible piece 31 butt each other, movable rod 28 moves to initial position under the effect that fifth spring 27 extends this moment, lift board 41 and move the lowest position this moment.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A low frequency low pressure deloading protection system under microgrid environment, characterized in that, protection system includes: the micro-grid power supply module is electrically connected with a monitoring module, and the monitoring module monitors the voltage and the frequency of a micro-grid circuit;

three power utilization modules are arranged below the auxiliary device, and the auxiliary device can control the power utilization modules to be switched on and off;

the protection system comprises the following specific operation steps:

s5, continuing to monitor the voltage and the frequency of the microgrid through the monitoring component, if the voltage and the frequency of the microgrid are within effective control parameter values (U is 220V, f is 50Hz), controlling the execution component through the judgment component to enable the driving motor to rotate reversely, driving the auxiliary device through the driving motor to sequentially start a control gate, and further sequentially connecting the power utilization module with the power grid;

2. An auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment is applied to the low-frequency and low-voltage load shedding protection system in the microgrid environment as claimed in claim 1, and is characterized by comprising an electric box (1), a switch (2) is fixedly mounted in the electric box (1), a switch (3) for controlling a microgrid circuit is arranged on the front surface of the switch (2), a toggle assembly for toggling the switch (3) is movably connected to the electric box (1), a toggle plate (6) for toggling the switch (3) is arranged on the toggle assembly, a limiting mechanism for fixing the toggle assembly is fixedly connected to the electric box (1), the limiting mechanism comprises a limiting assembly and a releasing assembly, a pushing assembly for pushing the releasing assembly is arranged in the electric box (1), a pushing block (21) is movably connected to the pushing assembly, a reset assembly is arranged below the electric box (1), and a lifting plate (41) used for pushing the shifting assembly to move upwards is arranged on the reset assembly.

3. The auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment of claim 2, characterized in that: stir the subassembly and include first spring (4), lifter (5) and support groove (7), first spring (4) fixed connection is in the inboard of electronic box (1), the bottom fixedly connected with of first spring (4) is used for driving lifter (5) of stirring board (6) up-and-down motion, lifter (5) swing joint is in the inboard of electronic box (1), stir outer wall at lifter (5) of movable plate (6) fixed connection, the bottom of lifter (5) is offered and is used for carrying out the support groove (7) injectd lifter (5).

4. The auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment of claim 3, characterized in that: the limiting component comprises a fixed bedplate (8), a first movable groove (9), a gear (10), a limiting frame (11) and a second spring (12), the fixed bedplate (8) is fixedly connected with the inside of the electric box (1), a first movable groove (9) used for limiting the movement of the assembly is arranged in the fixed bedplate (8), the gear (10) is rotatably connected inside the first movable groove (9), the lower end of the limiting frame (11) is movably connected inside the first movable groove (9), the lower end of the first movable groove (9) is provided with a tooth socket, the tooth socket at the lower end of the first movable groove (9) is meshed with the gear (10), the top of the first movable groove (9) is mutually abutted with the inner part of the abutting groove (7), one end of the second spring (12) is fixedly connected inside the first movable groove (9), the other end of the second spring (12) is fixedly connected with the limiting frame (11).

5. The auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment of claim 4, characterized in that: remove the subassembly and include first slurcam (13), first promotion groove (14), third spring (15), promote frame (16), magnetic conduction piece (17) and permanent magnet (18), first slurcam (13) fixed connection is in the inboard of spacing (11), the outer wall of first slurcam (13) runs through and sets up first promotion groove (14) of being convenient for promote piece (21) and passing through, the one end fixed connection of third spring (15) is in the inside of first slurcam (13), the other end of third spring (15) and the inside fixed connection who promotes frame (16), third spring (15) swing joint is at the outer wall of first slurcam (13), magnetic conduction piece (17) fixed connection is in the bottom that promotes frame (16), permanent magnet (18) fixed connection is in the inside of electronic box (1).

6. The auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment of claim 2, characterized in that: promote the subassembly and include threaded rod (19), guide arm (20), first flexible groove (22), fourth spring (23) and first flexible piece (24), threaded rod (19) rotate the inside of connecting at electronic box (1), guide arm (20) fixed connection is in the inside of electronic box (1), promote piece (21) threaded connection on threaded rod (19), the inboard activity sliding connection that promotes piece (21) is on guide arm (20), the inboard at promotion piece (21) is seted up in first flexible groove (22), the one end fixed connection of fourth spring (23) is in the inside of first flexible groove (22), the other end and first flexible piece (24) fixed connection of fourth spring (23), first flexible piece (24) swing joint is in the inside of first flexible groove (22).

7. The auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment of claim 2, characterized in that: the reset assembly comprises a sliding chute (25), a stabilizing rod (26), a fifth spring (27), a movable rod (28), a second telescopic groove (29), a sixth spring (30), a second telescopic block (31), a second pushing groove (32) and a second pushing plate (33), the sliding chute (25) penetrates through the bottom of the electric box (1), the stabilizing rod (26) is fixedly connected inside the sliding chute (25), one end of the fifth spring (27) is fixedly connected inside the sliding chute (25), the other end of the fifth spring (27) is fixedly connected with the movable rod (28), the middle of the movable rod (28) is movably connected inside the sliding chute (25), the second telescopic groove (29) is arranged at the upper end of the movable rod (28), the bottom of the sixth spring (30) is fixedly connected inside the second telescopic groove (29), and the top of the sixth spring (30) is fixedly connected with the second telescopic block (31) for resetting and pushing, the inside of second flexible piece (31) is seted up and is used for contacting second promotion groove (32) that reset promoted, fixedly connected with is used for pushing away second catch plate (33) that groove (32) cooperation was used with the second on electronic box (1).

8. The auxiliary device for low-frequency and low-voltage load shedding protection in a microgrid environment of claim 7, characterized in that: reset assembly still includes third promotion groove (34), guide bar (35), fixed frame (36), chute (37), lifting groove (38), lifting piece (39) and guide way (40), third promotion groove (34) run through and set up in the bottom of movable rod (28), the outside end swing joint of guide bar (35) is in the inside of third promotion groove (34), fixed frame (36) fixed connection is in the bottom of electronic box (1), chute (37) run through and set up the outer wall at fixed frame (36), the middle part swing joint of guide bar (35) is in the inside of chute (37), lifting groove (38) run through and set up the both sides at fixed frame (36), lifting piece (39) swing joint is in the inside of lifting groove (38), guide way (40) that are used for guide bar (35) to lead are seted up to the outer wall of lifting piece (39), the inner side end of the guide rod (35) is movably connected inside the guide groove (40), and the lifting plate (41) is fixedly connected to the outer wall of the lifting block (39).