CN114718825A

CN114718825A - Electric energy storage system and using method thereof

Info

Publication number: CN114718825A
Application number: CN202110967207.6A
Authority: CN
Inventors: 张昊; 张卜闻
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-04
Filing date: 2021-08-23
Publication date: 2022-07-08

Abstract

The invention discloses an electric energy storage system, which comprises a bracket, wherein the top of the bracket is provided with a mounting plate, the bottom of the bracket is provided with a base, the top of the mounting plate is fixedly connected with a motor-generator integrated machine, a control cabinet and a supporting seat, the output end of the motor-generator integrated machine is fixedly sleeved with a winch rotationally connected with the supporting seat, one side of the winch is provided with a brake component, the winch is provided with a steel wire rope, the other end of the steel wire rope extends to the lower part of the mounting plate and is fixedly connected with a weight box, and one side of the mounting plate, which is close to the base, is symmetrically and fixedly connected with two limiting slide bars The construction condition limitation is reduced, and the method is suitable for large-scale technical popularization.

Description

Electric energy storage system and using method thereof

Technical Field

The invention relates to the technical field of electric energy storage equipment, in particular to an electric energy storage system and a using method thereof.

Background

In recent years, with the rapid development of national economy, the electric power demand of China also increases rapidly, which drives the rapid expansion of the electric power industry, and the installed capacity of a power grid increases dramatically, however, the electric power load demand of China has huge peak-valley difference, often in a certain month of a year or a certain hour of a day, the electric power load demand increases rapidly, which brings huge operating pressure to the power grid and a power plant, and at other times, the power consumption is less, the unit operates in a low-load state, and cannot give play to high-efficiency performance, so that the utilization rate and operating economy of electric power equipment are greatly affected, which requires that an electric power energy storage system stores surplus electric power when the electric power load demand is less, and timely converts and releases electric power when the electric power load increases, so as to relieve the operating pressure of the unit.

The existing pumped storage system firstly pumps water to a high-level reservoir by utilizing surplus electric power, and releases the water in the reservoir when the electric power is insufficient to push a hydraulic generator to generate power and transmit the power to a power grid.

Disclosure of Invention

The invention aims to solve the problems that the existing pumped storage system adopts pumping water to be transferred to a high-level reservoir to store surplus power, has more construction condition limitation, strict construction condition and is not suitable for large-scale technical popularization, and provides an electric power storage system and a using method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an electric power energy storage system, which comprises a bracket, the top of support is equipped with the mounting panel, the bottom of support is equipped with basic base, the top fixedly connected with of mounting panel is electronic-electricity generation all-in-one, switch board and supporting seat, the fixed hoist engine that is connected with the supporting seat rotation of fixing the cover of the output of electronic-electricity generation all-in-one, one side of hoist engine is provided with brake assembly, be provided with wire rope on the hoist engine, wire rope's the other end extends to the below of mounting panel and fixedly connected with weight box, one side symmetry fixedly connected with two spacing slide bars that the mounting panel is close to with basic base mutually, and two spacing slide bars all slide and run through the weight box, the inside of switch board is provided with the controller subassembly, the controller subassembly passes through wireless communication UNICOM with national grid electric power peak shaving system.

Preferably, the controller assembly comprises a main controller, a first alternating current contactor, a second alternating current contactor, a grid-connected inverter and a wireless communication antenna, wherein the main controller, the first alternating current contactor, the second alternating current contactor, the grid-connected inverter and the wireless communication antenna are fixedly connected to the inner wall of one side of the control cabinet.

Preferably, the main controller is provided with a 485 communication interface extending to the outside of the control cabinet.

Preferably, the braking assembly comprises a gear fixedly sleeved on the winch, one side of the supporting seat, which is close to the winch, is rotatably connected with a braking piece which is meshed with the gear, one side of the supporting seat is provided with a return spring which resets the braking piece, one side of the supporting seat is positioned below the return spring and is fixedly connected with a braking stop limiting block, and the other side of the supporting seat is positioned at the other side of the braking piece and is fixedly connected with a powerful electromagnet.

Preferably, the weight box comprises a metal box body and a filler.

Preferably, the brake pad is made of iron.

A method of using an electrical energy storage system, comprising the steps of:

s1, the main controller of the energy storage system body is communicated with a national power grid through a wireless communication antenna, and when the instruction of a national power grid peak shaving system is received and surplus power needs to be stored, the main controller controls the first alternating current contactor to be attracted to connect the electric-power generation integrated machine to the national power grid;

s2, starting the electric-power generation integrated machine to drive the winch to rotate, tightening the steel wire rope to slowly lift the weight box, converting electric energy into potential energy, synchronously rotating the gear anticlockwise, enabling the powerful electromagnet to not work at the moment, enabling the brake piece to slide along the inclined plane meshed with the gear under the tension of the reset spring, and not affecting the rotation of the gear;

s3, after the energy storage operation is stopped, the main controller controls the first alternating current contactor to be disconnected, the power supply of the electric-power generation all-in-one machine is cut off, the electric-power generation all-in-one machine stops working, the weight box stops lifting, the winch loses power for anticlockwise rotation and can generate a trend for clockwise rotation under the action of the tension of the weight box, and at the moment, the brake pad can clamp the gear to play a role in braking and keeping the winch static;

s4, when the main controller receives an instruction that the peak shaving system needs to release electric energy, the driving gear rotates anticlockwise for a small angle to enable the gear to enable the brake block to be pushed to the top of the gear meshing area, meanwhile, the main controller controls the powerful electromagnet to be electrified and work to enable the powerful electromagnet to generate powerful magnetic attraction to attract one side of the brake block, the brake block is enabled to be separated from meshing braking on the gear, the gear is released at the moment, the winch starts to rotate clockwise without obstruction under the pulling force of the weight box, the main controller controls the second alternating current contactor to attract, the electric-power generation all-in-one machine is communicated with the grid-connected inverter, the winch drives the electric-power generation all-in-one machine to generate power, the generated power is rectified and inverted by the grid-connected inverter, and then is conveyed to a national power grid, and release of energy storage is completed.

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

1. when electric energy storage is needed, electric energy is converted into potential energy of the weight box, a matched reservoir does not need to be built, the occupied area is small, the device can be installed underground or in mountainous areas of buildings, and the limitation of installation environment conditions is small;

2. the invention can be independently used as an energy storage power station, also can be used as a unit, and uses the same unit to build a large-scale energy storage power station, thereby improving the energy storage capacity;

3. the energy storage system body is provided with a wireless communication mechanism communicated with a peak regulation system of a national power grid, can receive a regulation and control instruction sent by the peak regulation system in real time, quickly and efficiently responds to energy storage or electric energy release operation, and reduces the running pressure of the power grid;

4. a winch with a brake mechanism is arranged to control the lifting of the weight box, so that efficient and safe energy storage and release are realized;

5. the master controller is provided with a universal 485 communication interface, and can quickly input and output program commands and data;

6. on the basis of balancing the material cost of the weight box filler, the cost of the support and the stability of the structure, the supports with different heights or the fillers with different densities are designed, and the size of the energy storage capacity can be adjusted.

According to the invention, through arranging the counterweight mechanism driven by the electric-power generation integrated machine to lift, surplus electric energy is converted into potential energy to be stored and released when the counterweight mechanism is required to be used, so that the construction of a large reservoir in a pumped storage power station is avoided, and the aims of reducing the construction area of an electric energy storage system, reducing the construction condition limitation and being suitable for large-scale technical popularization are fulfilled.

Drawings

Fig. 1 is a schematic diagram of an overall structure of an electric energy storage system according to the present invention;

fig. 2 is a connection diagram of an electrical device of an electrical energy storage system according to the present invention;

FIG. 3 is a schematic three-dimensional structure diagram of a brake assembly of the electric energy storage system according to the present invention;

fig. 4 is a schematic diagram of a support structure of an electric energy storage system according to the present invention;

FIG. 5 is a schematic illustration of a brake pad configuration of an electrical energy storage system according to the present invention;

fig. 6 is a schematic structural diagram of a weight box of an electric energy storage system according to the present invention.

In the figure: 1. an electric-power generation all-in-one machine; 2. a control cabinet; 21. a main controller; 22. a first AC contactor; 23. a second AC contactor; 24. a grid-connected inverter; 25. a wireless communication antenna; 26. 485 communication interface; 3. a winch; 31. a gear; 32. a brake pad; 33. a brake stop stopper; 34. a return spring; 35. a powerful electromagnet; 4. a supporting seat; 5. a wire rope; 6. a support; 7. a weight box; 8. a limiting slide bar; 9. a national grid; 61. mounting a plate; 62. a base.

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.

Example one

Referring to fig. 1-6, an electric energy storage system comprises a support 6, a mounting plate 61 is arranged at the top of the support 6, a base 62 is arranged at the bottom of the support 6, an electric-power generation integrated machine 1, a control cabinet 2 and a support base 4 are fixedly connected to the top of the mounting plate 61, a winch 3 rotatably connected with the support base 4 is fixedly sleeved at the output end of the electric-power generation integrated machine 1, a brake assembly is arranged at one side of the winch 3, a steel wire rope 5 is arranged on the winch 3, the other end of the steel wire rope 5 extends to the lower side of the mounting plate 61 and is fixedly connected with a weight box 7, two limiting slide bars 8 are symmetrically and fixedly connected to one side of the mounting plate 61 close to the base 62, and two limit slide bars 8 all slide and run through weight box 7, and the inside of switch board 2 is provided with the controller subassembly, and the controller subassembly passes through wireless communication UNICOM with national grid 9 electric power peak shaving system.

Example two

Referring to fig. 1-6, the present invention provides a technical solution: an electric energy storage system comprises a support 6, a mounting plate 61 is arranged at the top of the support 6, a base 62 is arranged at the bottom of the support 6, the base 62 is a giant base poured by reinforced concrete, an electric-power generation all-in-one machine 1, a control cabinet 2 and a support seat 4 are fixedly connected to the top of the mounting plate 61, a winch 3 rotatably connected with the support seat 4 is fixedly sleeved at the output end of the electric-power generation all-in-one machine 1, a brake assembly is arranged at one side of the winch 3 and comprises a gear 31 fixedly sleeved on the winch 3, a brake disc 32 meshed with the gear 31 is rotatably connected to one side of the support seat 4 close to the winch 3, the brake disc 32 is made of iron, a reset spring 34 for resetting the brake disc 32 is arranged at one side of the support seat 4, a brake stop stopper 33 is fixedly connected to one side of the support seat 4 below the reset spring 34, one side of the supporting seat 4 is positioned at the other side of the brake block 32 and is fixedly connected with a powerful electromagnet 35, a winch 3 with a brake mechanism is arranged to control the lifting of a weight box 7 so as to realize safe energy storage and release, a steel wire rope 5 is arranged on the winch 3, the other end of the steel wire rope 5 extends to the lower part of the mounting plate 61 and is fixedly connected with the weight box 7, the weight box 7 comprises a metal box body and fillers, on the basis of balancing the material cost of the fillers of the weight box 7, the cost of the brackets 6 and the structural stability, the brackets 6 with different heights or the fillers with different densities are designed, the size of the energy storage capacity can be adjusted, when electric energy storage is needed, the electric energy is converted into potential energy of the weight box 7, a matched reservoir does not need to be built, the occupied area is small, the weight box can be mounted under the ground of a building, a mountain area and the like, the limitation of the mounting environmental conditions is small, one side, which is close to the mounting plate 61 and the base 62, is symmetrically and fixedly connected with two limiting slide rods 8, and two limiting slide bars 8 are both slidably penetrated through the weight box 7, a controller assembly is arranged in the control cabinet 2 and comprises a main controller 21, a first alternating current contactor 22, a second alternating current contactor 23, a grid-connected inverter 24 and a wireless communication antenna 25 which are fixedly connected to the inner wall of one side of the control cabinet 2, the main controller 21 is provided with a 485 communication interface 26 which extends to the outside of the control cabinet 2 and can quickly input and output program commands and data, the controller assembly is communicated with a national power grid 9 power peak regulation system through wireless communication, an energy storage system body is provided with a wireless communication mechanism communicated with the peak regulation system of the national power grid 9, the control commands sent by the peak regulation system can be received in real time, the operation of energy storage or electric energy release can be quickly and efficiently responded, and the operation pressure of the power grid is reduced.

A method of using an electric power storage system, comprising the steps of:

s1, the main controller 21 of the energy storage system body is communicated with the electric power peak shaving system of the national power grid 9 through the wireless communication antenna 25, and when the instruction of the peak shaving system of the national power grid 9 is received and surplus electric power needs to be stored, the main controller 21 controls the first alternating current contactor 22 to be attracted, so that the electric-power generation all-in-one machine 1 is connected to the national power grid 9;

s2, starting the electric-power generation all-in-one machine 1 to drive the winch 3 to rotate, tightening the steel wire rope 5 to slowly lift the weight box 7, converting electric energy into potential energy, simultaneously, synchronously rotating the gear 31 anticlockwise, at the moment, enabling the powerful electromagnet 35 not to work, enabling the brake disc 32 to slide along the inclined plane meshed with the gear 31 under the pulling force of the reset spring 34, and not influencing the rotation of the gear 31;

s3, after the energy storage operation is stopped, the main controller 21 controls the first ac contactor 22 to be turned off, the power supply of the integrated motor-generator 1 is cut off, the integrated motor-generator 1 stops working, the weight box 7 stops lifting, the winch 3 loses the counterclockwise rotation power and generates a clockwise rotation trend under the pulling force of the weight box 7, at this time, the brake pad 32 will block the gear 31, and the winch 3 is braked and kept still;

s4, when the main controller 21 receives the command that the peak shaver system needs to release the electric power, the driving gear 31 rotates counterclockwise by a small angle to make the gear 31 push the brake plate 32 to the top of the meshing area of the gear 31, meanwhile, the main controller 21 controls the powerful electromagnet 35 to be electrified to work to generate powerful magnetic attraction to attract one side of the brake piece 32, so that the brake piece 32 is separated from the meshing braking of the gear 31, the gear 31 is released at the moment, the winch 3 starts to rotate clockwise without hindrance under the pulling force of the weight box 7, the main controller 21 controls the second alternating current contactor 23 to attract, the electric-power generation all-in-one machine 1 is communicated with the grid-connected inverter 24, the winch 3 drives the electric-power generation all-in-one machine 1 to rotate for power generation, and the generated power is rectified and inverted by the grid-connected inverter 24 and then is transmitted to the national power grid 9 to complete the release of energy storage.

The working principle is as follows: the main controller 21 of the energy storage system body is communicated with the power peak-shaving system of the national power grid 9 through the wireless communication antenna 25, when receiving an instruction of the peak-shaving system of the national power grid 9 and needing to store surplus power, the main controller 21 controls the first alternating current contactor 22 to be sucked to connect the electric-power generation all-in-one machine 1 to the national power grid 9, the electric-power generation all-in-one machine 1 is started to drive the winch 3 to rotate, the steel wire rope 5 is tightened to slowly lift the weight box 7 and convert electric energy into potential energy, meanwhile, the gear 31 synchronously rotates anticlockwise, the strong electromagnet 35 does not work at the moment, the brake disc 32 slides along with the inclined plane meshed with the gear 31 under the pulling force of the reset spring 34 and cannot influence the rotation of the gear 31, after the energy storage operation is stopped, the main controller 21 controls the first alternating current contactor 22 to be disconnected to cut off the power supply of the electric-power generation all-in-one-up machine 1, when the electric-power generation integrated machine 1 stops working, the weight box 7 stops lifting, the winch 3 loses the power of anticlockwise rotation and can generate a trend of clockwise rotation under the action of the tension of the weight box 7, at the moment, the brake block 32 can clamp the gear 31 to play a role of braking and keeping the winch 3 static, when the main controller 21 receives an instruction that a peak regulation system needs to release electric energy, the main controller 21 firstly drives the gear 31 to anticlockwise rotate by a small angle to enable the gear 31 to push the brake block 32 to the top of the meshing area of the gear 31, and simultaneously, the main controller 21 controls the powerful electromagnet 35 to be electrified and work to generate powerful magnetic attraction to attract one side of the brake block 32 to enable the brake block 32 to be separated from the meshing braking of the gear 31, at the moment, the gear 31 is released, the winch 3 starts to rotate clockwise without obstruction under the tension of the weight box 7, and the second alternating current contactor 23 is controlled to attract by the main controller 21, the electric-power generation all-in-one machine 1 is communicated with the grid-connected inverter 24, the winch 3 drives the electric-power generation all-in-one machine 1 to rotate for power generation, and the generated power is rectified and inverted by the grid-connected inverter 24 and then is transmitted to a national power grid 9 to complete the release of energy storage.

However, as is well known to those skilled in the art, the operation principle and the wiring method of the integrated electric-power generation machine 1, the national grid 9, the main controller 21, the first ac contactor 22, the second ac contactor 23, the grid-connected inverter 24, the wireless communication antenna 25, the powerful electromagnet 35, and the winch 3 are common and are conventional means or common general knowledge, and thus will not be described herein again, and those skilled in the art can make any choice according to their needs or convenience.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An electric energy storage system comprises a support (6) and is characterized in that a mounting plate (61) is arranged at the top of the support (6), a base (62) is arranged at the bottom of the support (6), an electric-power generation integrated machine (1), a control cabinet (2) and a supporting seat (4) are fixedly connected to the top of the mounting plate (61), a winch (3) rotatably connected with the supporting seat (4) is fixedly sleeved at the output end of the electric-power generation integrated machine (1), a braking assembly is arranged on one side of the winch (3), a steel wire rope (5) is arranged on the winch (3), the other end of the steel wire rope (5) extends to the lower part of the mounting plate (61) and is fixedly connected with a weight box (7), two limiting slide rods (8) are symmetrically and fixedly connected to one side, close to the base (62), of the mounting plate (61), and the two limiting slide rods (8) penetrate through the weight box (7), the inside of switch board (2) is provided with the controller subassembly, and the controller subassembly passes through wireless communication UNICOM with national grid (9) electric power peak regulation system.

2. An electric energy storage system according to claim 1, characterized in that the controller assembly comprises a main controller (21), a first ac contactor (22), a second ac contactor (23), a grid-connected inverter (24) and a wireless communication antenna (25), which are fixedly connected to one side of the inner wall of the control cabinet (2).

3. An electric power storage system according to claim 2, characterized in that the main controller (21) is provided with a communication interface extending to the outside of the control cabinet (2).

4. The electric energy storage system according to claim 1, wherein the brake assembly comprises a gear (31) fixedly sleeved on the winch (3), one side of the support seat (4) close to the winch (3) is rotatably connected with a brake pad (32) meshed with the gear (31), one side of the support seat (4) is provided with a return spring (34) for returning the brake pad (32), one side of the support seat (4) is fixedly connected with a brake stop stopper (33) below the return spring (34), and one side of the support seat (4) is fixedly connected with a powerful electromagnet (35) at the other side of the brake pad (32).

5. An electric power energy storage system according to claim 1, characterized in that the weight box (7) comprises a metal box and a filler.

6. An electric energy storage system according to claim 4, characterized in that the brake pads (32) are manufactured from iron.

7. Use of an electric energy storage system according to any of claims 1-6, characterized by the steps of:

s1, a main controller (21) of the energy storage system body is communicated with a national power grid (9) through a wireless communication antenna (25), and when the main controller (21) receives an instruction of a peak regulation system of the national power grid (9) and needs to store surplus power, the main controller (21) controls a first alternating current contactor (22) to be attracted to connect the electric-power generation all-in-one machine (1) into the national power grid (9);

s2, starting the electric-power generation integrated machine (1) to drive the winch (3) to rotate, tightening the steel wire rope (5) to slowly lift the weight box (7), converting electric energy into potential energy, synchronously rotating the gear (31) anticlockwise, enabling the powerful electromagnet (35) not to work at the moment, sliding the brake disc (32) along with the inclined plane meshed with the gear (31) under the pulling force of the reset spring (34), and not influencing the rotation of the gear (31);

s3, after the energy storage operation is stopped, the main controller (21) controls the first alternating current contactor (22) to be disconnected, the power supply of the electric-power generation all-in-one machine (1) is cut off, the electric-power generation all-in-one machine (1) stops working, the weight box (7) stops lifting, the winch (3) loses power rotating anticlockwise and can generate a trend of rotating clockwise under the action of the pulling force of the weight box (7), and at the moment, the brake piece (32) can clamp the gear (31) to brake and keep the winch (3) static;

s4, when the main controller (21) receives an instruction that the peak shaving system needs to release electric energy, firstly, the driving gear (31) rotates anticlockwise by a small angle to enable the gear (31) to prop the brake block (32) to the top of the meshing area of the gear (31), meanwhile, the main controller (21) controls the powerful electromagnet (35) to work in an electrified mode to enable the powerful electromagnet to generate powerful magnetic attraction to attract one side of the brake block (32) to enable the brake block (32) to be separated from meshing braking on the gear (31), at the moment, the gear (31) is released, the winch (3) starts to rotate clockwise without hindrance under the pulling force of the weight box (7), the main controller (21) controls the second alternating current contactor (23) to attract, the electric-power generation all-in-one machine (1) is communicated with the grid-connected inverter (24), and the winch (3) drives the electric-power generation all-in-one machine (1) to rotate for power generation, the generated electric power is rectified and inverted by a grid-connected inverter (24) and then is transmitted to a national power grid (9) to finish the release of stored energy.