Energy storage grid-connected device capable of realizing rapid isolation

Abstract

The invention discloses an energy storage grid connection device capable of realizing rapid isolation, and relates to the technical field of energy storage grid connection, the energy storage grid connection device comprises a device main body and a mounting seat, the inner side of a mounting groove is fixedly connected with a heat dissipation plate, a pull-down mechanism is mounted on the inner side of a base, an isolation mechanism is mounted on one side of the mounting seat, and the top of the inner side of the device main body is slidably connected with a sliding plate; the reset mechanism is installed between the two sets of sliding plates, connecting ropes are fixedly connected between the sliding plates and the installation base, a heat dissipation frame is slidably connected to the top of the device body, the synchronous driving mechanism is installed between the installation frame and the sliding plates, and the protection mechanism is installed on the upper side of the device body. According to the device, when a fire breaks out, the heat dissipation holes are sealed through spring force to isolate smoke, meanwhile, the pull-down action is converted into lifting of the heat dissipation plate through gear linkage, heat dissipation is isolated without interruption, the protective ceiling is automatically formed along with heat dissipation unfolding, and full-automatic reset is achieved, in addition, current decoupling control is combined with phase self-adaptive adjustment, and the heat dissipation efficiency is improved. Harmonic waves are significantly suppressed and power grid adaptability is improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage grid connection technology, and more specifically to an energy storage grid connection device that can be quickly isolated. Background Technology

[0002] As the scale of new energy grid connection continues to expand, the demand for safety protection of energy storage devices is becoming increasingly prominent. The current mainstream solution adopts an independent heat dissipation structure and physical isolation design. In case of fire, the heat dissipation holes are sealed by a fusible baffle, while relying on the external fire protection system to control the temperature. Although this technology can achieve basic isolation, it is difficult to meet the continuous heat dissipation requirements under isolation conditions, and the protection structure and reset mechanism mostly rely on manual intervention.

[0003] Most existing energy storage grid-connected isolation devices seal the heat dissipation channel by setting a liftable isolation plate at the bottom of the box and using a side-mounted ventilator to maintain internal airflow circulation. The device uses a motor to drive a roller shutter-type baffle to cover the heat dissipation holes, and at the same time starts an independent cooling fan to compensate for the heat dissipation.

[0004] However, the above-mentioned solutions have significant limitations. First, the isolation action and the heat dissipation system operate independently. After the baffle closes the heat dissipation holes, the forced convection relies solely on the fan, which drastically reduces the heat dissipation efficiency and can easily lead to overheating of internal components. Second, the protective structure requires additional power to deploy, and post-disaster reset depends on manual remounting of the baffle. Third, no linkage protection mechanism is designed, and exposed heat dissipation components are easily damaged by fire debris. These defects severely restrict the reliability and long-term operation capability of the device.

[0005] Based on this, the present invention designs a grid-connected energy storage device that can be quickly isolated to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an energy storage grid-connected device that can be quickly isolated.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A rapidly isolating energy storage grid-connected device includes a device body and a mounting base, and further includes a pull-down mechanism, an isolation mechanism, a reset mechanism, a synchronous drive mechanism, a protective mechanism, and a control system. A base is fixedly connected to the bottom of the device body. Mounting slots are formed on both sides of the device body. A heat dissipation plate is fixedly connected to the inner side of the mounting slot, and a heat dissipation groove is formed on the outer side of the heat dissipation plate. The pull-down mechanism is installed inside the base. The isolation mechanism is installed on one side of the mounting base. Two sets of symmetrically arranged sliding plates are slidably connected to the top inner side of the device body. The reset mechanism is installed between the two sets of sliding plates. A connecting rope is fixedly connected between the sliding plates and the mounting base. A heat dissipation frame is slidably connected to the top of the device body. The synchronous drive mechanism is installed between the heat dissipation frame and the sliding plates. The protective mechanism is installed on the upper side of the device body. The control system is installed inside the device body.

[0009] Furthermore, the pull-down mechanism includes a rotating rod and a pull rope. A drive motor is fixedly connected to the outside of the base, and a protective cover is fixedly connected to the outside of the drive motor. The rotating rod is rotatably connected to the inside of the base and fixedly connected to one side of the output shaft of the drive motor. The pull rope is fixedly connected to the outside of the rotating rod, and the end of the pull rope passes through the base and the main body of the device and is fixedly connected to the lower side of the mounting base.

[0010] Furthermore, the isolation mechanism includes a compression spring and a blocking block. The compression spring is fixedly connected to the inner side of the mounting base, and the blocking block is fixedly connected to the end of the compression spring. The blocking block is slidably connected to the inner side of the mounting base, and the outer surface of the blocking block abuts against the inner side of the device body.

[0011] Furthermore, the reset mechanism includes a locking block and a first tension spring. A locking groove is provided on the top inner side of the main body of the device. The locking block is fixedly connected to the upper side of the slide plate and is limited to sliding connection to the inner side of the locking groove. The first tension spring is fixedly connected between the two sets of locking blocks and the two sets of slide plates abut against each other.

[0012] Furthermore, a guide ring is fixedly connected to the inner side of the main body of the device, and the connecting rope passes through the inner side of the guide ring.

[0013] Furthermore, the heat dissipation frame comprises a top plate, a bottom plate, a connecting plate, and a heat-conducting plate. The top plate is placed on the upper side of the main body of the device, and the bottom plate is placed inside the main body of the device. The connecting plate and the heat-conducting plate are fixedly connected between the top plate and the bottom plate, and the connecting plate and the heat-conducting plate are slidably connected to the upper side of the main body of the device. There are several sets of connecting plates arranged horizontally, and there are two sets of heat-conducting plates installed on both sides of the multiple sets of connecting plates. A sealing block is fixedly connected to the upper side of the main body of the device, and the connecting plate and the heat-conducting plate are slidably connected to the sealing block.

[0014] Furthermore, the synchronous drive mechanism includes a horizontal toothed plate, a vertical toothed plate, a rotating shaft, a first gear, and a second gear. The horizontal toothed plate is fixedly connected to the bottom of the slide plate, the vertical toothed plate is fixedly connected to the outside of the heat-conducting plate, the rotating shaft is rotatably connected to the inside of the main body of the device, and the first gear and the second gear are fixedly connected to the outside of the rotating shaft and arranged horizontally. The first gear meshes with the horizontal toothed plate, and the second gear meshes with the vertical toothed plate.

[0015] Furthermore, the protective mechanism includes a fixing component, a rotating plate, an extension plate, a second tension spring, and a rotating component. Two sets of fixing components are symmetrically fixed to the upper side of the main body of the device. The rotating plate is rotatably connected to the outside of the fixing components. One end of the second tension spring is fixedly connected to the inside of the rotating plate, and the other end of the second tension spring is fixedly connected to the extension plate. The extension plate is slidably connected to the inside of the rotating plate. Each rotating component is rotatably connected to the ends of the two sets of extension plates. Both the fixing component and the rotating component are structures composed of fixing rods fixedly connected between the two sets of fixing plates. The rotating plate is rotatably connected to the outside of the fixing rods installed inside the fixing components, and the end of the extension plate is rotatably connected to the outside of the fixing rods installed inside the rotating components.

[0016] Furthermore, the control system includes a distributed energy storage device, a dual-loop control module, a droop control module, and a PLC phase-locked loop. The distributed energy storage device is sequentially connected to a voltage inverter module and a filter module. The output of the filter module is connected to the AC power grid. The input of the dual-loop control module is connected to a built-in voltage / current acquisition unit. The output of the dual-loop control module controls the voltage inverter module, and the dual-loop control module includes an inner loop controller and a Park conversion unit. The input of the droop control module receives the output signal from the blocking block, and the output of the droop control module provides reference commands to the dual-loop control module. The droop control module includes a power calculation unit and an amplitude-frequency command generation unit. The input of the PLC phase-locked loop is connected to the voltage / current acquisition unit, and the output of the PLC phase-locked loop is connected to the amplitude-frequency command generation unit of the droop control module to achieve dynamic parameter correction.

[0017] Furthermore, the dual-loop control module decouples the current / voltage signals along the dq axis through the Park transformation unit, and the inner loop controller performs the inner loop current control. The amplitude-frequency command generation unit of the droop control module dynamically generates voltage amplitude and frequency commands based on the power calculation results and the phase signal of the PLC phase-locked loop.

[0018] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The energy storage grid-connected device that can be quickly isolated automatically closes the heat dissipation channel in case of fire, and ensures the sealing by spring force, effectively preventing the intrusion of external smoke. At the same time, it uses gear linkage to convert the pulling action into the lifting of the heat dissipation plate. Even in the completely isolated state, it can still dissipate heat through the exposed heat conduction plate, avoiding damage to internal components due to overheating, and achieving a dynamic balance between protection and heat dissipation.

[0019] 2. The energy storage grid-connected device can be quickly isolated. The protective canopy automatically unfolds as the heat dissipation plate is raised, without the need for additional drive. It forms a triangular shielding structure to protect exposed heat dissipation components and prevent damage from sparks or falling objects. The post-disaster reset process is fully automated, reducing manual intervention and improving the maintainability and long-term reliability of the device.

[0020] 3. The energy storage grid-connected device can be quickly isolated. The current control adopts decoupling technology to eliminate harmonic interference. Combined with real-time phase tracking and dynamic adjustment of output, the grid-connected current waveform is more stable, significantly improving power quality. At the same time, it enhances the adaptability to grid frequency fluctuations and ensures efficient grid-connected operation under different operating conditions.

[0021] 4. The energy storage grid-connected device can be quickly isolated. The overall structure adopts a mechanical linkage design, and the functional modules work together. Fire isolation, heat dissipation compensation, protection deployment and post-disaster reset are all achieved through a single drive source, which simplifies the control logic, reduces energy consumption, reduces failure points, and improves the response speed and reliability of the device in emergency situations. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a perspective view of a grid-connected energy storage device capable of rapid isolation according to the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a first front sectional view of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0027] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0028] Figure 6 for Figure 3 Enlarged view of point D in the middle;

[0029] Figure 7 for Figure 3 Enlarged view at point E in the middle;

[0030] Figure 8 This is a second orthographic view of the present invention;

[0031] Figure 9 for Figure 8 Enlarged view at point F;

[0032] Figure 10 for Figure 1 Enlarged view of point G in the middle;

[0033] Figure 11 This is the third orthographic view of the present invention;

[0034] Figure 12 for Figure 11 Enlarged view of point H in the middle;

[0035] Figure 13 This is a block diagram of the control system of the present invention.

[0036] The labels in the diagram represent:

[0037] 1. Main body of the device; 2. Base; 3. Mounting slot; 4. Heat sink; 5. Mounting seat; 6. Drive motor; 7. Protective cover; 8. Rotating rod; 9. Pull rope; 10. Sealing block; 11. Compression spring; 12. Slide plate; 13. Slot; 14. Locking block; 15. First tension spring; 16. Connecting rope; 17. Guide ring; 18. Top plate; 19. Bottom plate; 20. Connecting plate; 21. Heat conducting plate; 22. Sealing block; 23. Horizontal toothed plate; 24. Vertical toothed plate; 25. Rotating shaft; 26. 27. First gear; 28. Second gear; 29. ​​Fixing component; 30. Rotating plate; 31. Extension plate; 32. Second tension spring; 33. Rotating component; 34. Distributed energy storage device; 35. Dual-loop control module; 36. Droop control module; 37. PLC phase-locked loop; 38. Voltage inverter module; 39. Filtering module; 40. Voltage / current acquisition unit; 41. Park conversion unit; 42. Inner loop controller; 43. Power calculation unit; 44. Amplitude-frequency command generation unit. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-12 A rapidly isolating energy storage grid-connected device includes a device body 1 and a mounting base 5. The device body 1, as the core load-bearing structure of the entire device, is made of high-strength metal material, and its internal space is used to accommodate energy storage units and electrical components. The mounting base 5, as a movable component, is installed inside the device body 1 to achieve dynamic adjustment of the isolation function. A base 2 is fixedly connected to the bottom of the device body 1, which serves as the supporting foundation of the device and ensures overall stability. Mounting grooves 3 are opened on both sides of the device body 1. The mounting grooves 3 serve as openings for heat dissipation channels, penetrating the side walls of the device body 1 to allow for internal and external air circulation. A heat dissipation plate 4 is fixedly connected to the inner side of the mounting groove 3. The heat dissipation plate 4 is made of aluminum alloy, and heat dissipation grooves are opened on the outer side of the heat dissipation plate 4. These heat dissipation grooves are arranged in a wave shape to optimize the airflow path and improve heat dissipation efficiency.

[0040] The pull-down mechanism is installed inside the base 2. As an emergency isolation actuator, the pull-down mechanism can respond quickly in emergencies such as fires. The pull-down mechanism includes a rotating rod 8 and a pull rope 9. The rotating rod 8 is the core component for power transmission. The pull rope 9 is retracted and extended through rotational motion. A drive motor 6 is fixedly connected to the outside of the base 2. The drive motor 6 is a servo motor with precise speed control and position feedback. A protective cover 7 is fixedly connected to the outside of the drive motor 6. The protective cover 7 is waterproof and dustproof to ensure stable operation of the motor in harsh environments. The rotating rod 8 is rotatably connected to the inside of the base 2 and fixedly connected to the output shaft of the drive motor 6. This direct connection design reduces power transmission loss. The pull rope 9 is fixedly connected to the outside of the rotating rod 8. The pull rope 9 is made of high-strength steel wire rope with excellent tensile strength and high temperature resistance. The end of the pull rope 9 passes through the base 2 and the main body 1 and is fixedly connected to the lower side of the mounting base 5. This through-type connection ensures the linearity and stability of the pulling force transmission.

[0041] The isolation mechanism is installed on one side of the mounting base 5. As a key component of the sealing function, the isolation mechanism can quickly close the heat dissipation channel when triggered. The isolation mechanism includes a compression spring 11 and a sealing block 10. The compression spring 11 is made of stainless steel as an elastic element, which has a stable elastic coefficient and fatigue resistance. The compression spring 11 is fixedly connected to the inside of the mounting base 5. This built-in installation saves space and is easy to maintain. The sealing block 10 is fixedly connected to the end of the compression spring 11. The sealing block 10 is made of high temperature resistant rubber material. Its conical design can ensure a tight fit when sealing. The sealing block 10 is slidably connected to the inside of the mounting base 5. This sliding fit ensures smooth operation. The outer surface of the sealing block 10 abuts against the inside of the device body 1. This contact method can form an effective sealing interface when triggered.

[0042] Two sets of symmetrically arranged slide plates 12 are slidably connected to the inner top of the main body 1 of the device. As an important component of the linkage mechanism, the symmetrical design of the slide plates 12 ensures the balance of the movement. A reset mechanism is installed between the two sets of slide plates 12. The reset mechanism is used to restore each component to its initial position after the emergency is lifted. The reset mechanism includes a locking block 14 and a first tension spring 15. The locking block 14 is fixedly connected to the slide plate 12 as a limiting component to ensure precise control of the movement trajectory. A slot 13 is opened on the inner top of the main body 1 of the device. The slot 13 serves as a guide structure. Its U-shaped groove design can effectively limit the movement range of the locking block 14. The locking block 14 is fixedly connected to the upper side of the slide plate 12, and the locking block 14 is slidably connected to the inner side of the slot 13. This cooperation method ensures both freedom and prevents the risk of derailment. The first tension spring 15 is fixedly connected between the two sets of locking blocks 14. The first tension spring 15 adopts a double-strand spring design to provide uniform rebound force. The two sets of slide plates 12 abut against each other. This contact design ensures the synchronicity of the movement on both sides.

[0043] A connecting rope 16 is fixedly connected between the slide plate 12 and the mounting base 5. The connecting rope 16 serves as a power transmission medium. Its nylon material is flexible and wear-resistant. A guide ring 17 is fixedly connected to the inner side of the main body 1 of the device. The guide ring 17 is lined with ceramic to reduce rope friction loss. The connecting rope 16 passes through the inner side of the guide ring 17. This guiding arrangement ensures the accuracy of the tension direction.

[0044] A heat sink is slidably connected to the top of the main body 1 of the device. As an auxiliary heat dissipation component, the heat sink maintains its heat dissipation function when the main heat dissipation channel is closed. The heat sink comprises a top plate 18, a bottom plate 19, a connecting plate 20, and a heat-conducting plate 21. The top plate 18, as the upper load-bearing structure, is made of aluminum alloy sheet and is positioned on the upper side of the main body 1. Its smooth surface facilitates heat dissipation. The bottom plate 19 is located inside the main body 1 and is equipped with heat-conducting fins to increase the contact area. The connecting plate 20 and the heat-conducting plate 21 are both fixedly connected between the top plate 18 and the bottom plate 19. The connecting plate 20 serves as a supporting frame to ensure structural strength and connects... Plate 20 and heat-conducting plate 21 are slidably connected to the upper side of the main body 1 of the device. This sliding fit achieves a high degree of adjustability. There are several sets of connecting plates 20 arranged horizontally. This array arrangement optimizes the heat conduction path. There are two sets of heat-conducting plates 21 installed on both sides of multiple sets of connecting plates 20. The heat-conducting plates 21 have built-in heat pipe technology to improve heat conduction efficiency. A sealing block 22 is fixedly connected to the upper side of the main body 1. The sealing block 22 is made of silicone material to ensure the sealing of the sliding parts. Both the connecting plate 20 and the heat-conducting plate 21 are slidably connected to the sealing block 22. This fit takes into account both sealing and freedom of movement.

[0045] The synchronous drive mechanism is installed between the heat sink and the slide plate 12. The synchronous drive mechanism realizes the precise linkage of mechanical actions. The synchronous drive mechanism includes a horizontal toothed plate 23, a vertical toothed plate 24, a rotating shaft 25, a first gear 26, and a second gear 27. The horizontal toothed plate 23 serves as a horizontal motion conversion component. Its hardened tooth surface ensures transmission accuracy. The horizontal toothed plate 23 is fixedly connected to the bottom of the slide plate 12. This rigid connection ensures power transmission efficiency. The vertical toothed plate 24 is fixedly connected to the outside of the heat-conducting plate 21. The helical tooth design of the vertical toothed plate 24 reduces transmission noise. The rotating shaft 25 is rotatably connected to the inside of the main body 1 of the device. The rotating shaft 25 adopts a hollow design to reduce weight. The first gear 26 and the second gear 27 are fixedly connected to the outside of the rotating shaft 25 and are arranged horizontally. The gear set is precision machined to ensure smooth meshing. The first gear 26 meshes with the horizontal toothed plate 23. This meshing method realizes the conversion of the motion direction. The second gear 27 meshes with the vertical toothed plate 24. This transmission arrangement ensures the synchronicity of the actions.

[0046] The protective mechanism is installed on the upper side of the main body 1 of the device. As a safety component, the protective mechanism can prevent external factors from damaging the device. The protective mechanism includes a fixing member 28, a rotating plate 29, an extension plate 30, a second tension spring 31, and a rotating member 32. The fixing member 28, as a basic support member, is made of galvanized steel plate. There are two sets of fixing members 28, which are symmetrically fixed to the upper side of the main body 1 of the device. This symmetrical arrangement ensures balanced force. The rotating plate 29 is rotatably connected to the outside of the fixing member 28. The hinge point of the rotating plate 29 uses a self-lubricating bearing. One end of the second tension spring 31 is fixedly connected to the inside of the rotating plate 29. The preload design of the second tension spring 31 ensures rapid response, and the other end of the second tension spring 31 is fixed to the extension plate 30. The connection method enables effective force transmission. The extension plate 30 is slidably connected to the inner side of the rotating plate 29. The guide rail design of the extension plate 30 ensures the linearity of the movement. The rotating component 32 is rotatably connected to the ends of the two sets of extension plates 30. The universal joint design of the rotating component 32 is adapted to multi-angle adjustment. The fixing component 28 and the rotating component 32 are both structures composed of fixing rods that are fixedly connected between the two sets of fixing plates. This frame design takes into account both strength and light weight. The rotating plate 29 is rotatably connected to the outside of the fixing rod installed inside the fixing component 28. This bearing cooperation ensures smooth rotation. The end of the extension plate 30 is rotatably connected to the outside of the fixing rod installed inside the rotating component 32. This connection method allows a certain range of degrees of freedom.

[0047] In this embodiment, when a fire breaks out in the installation area of ​​the device, the drive motor 6 starts immediately, driving the rotating rod 8 to rotate and wind the pull rope 9, causing the mounting base 5 to be pulled down towards the base 2. During the downward movement of the mounting base 5, the compression spring 11 on its inner side pushes the sealing block 10 outward and accurately embeds it into the mounting grooves 3 on both sides of the base 2, completely sealing the heat dissipation grooves of the heat dissipation plate 4. The continuous elastic force of the compression spring 11 ensures that the sealing block 10 is tightly abutted against the inner wall of the device body 1, forming an airtight isolation and effectively preventing the intrusion of external smoke.

[0048] At the same time, the mounting base 5 pulls two sets of symmetrical sliding plates 12 to slide back and forth through the connecting rope 16, stretching the first tension spring 15 of the reset mechanism. The horizontal toothed plate 23 at the bottom of the sliding plate 12 drives the first gear 26 that meshes with it to rotate. Through the rotating shaft 25, the second gear 27 is linked, forcing the vertical toothed plate 24 that meshes with the second gear 27 to move upward. The vertical toothed plate 24 drives the heat conduction plate 21 and the top plate 18 of the heat dissipation frame to rise as a whole, so that the lower part of the heat conduction plate 21 retains the inside of the main body 1 of the device and the upper part is exposed to the external environment, so that the internal heat is efficiently discharged through the heat conduction plate 21, ensuring that the energy storage unit continues to dissipate heat in the isolated state.

[0049] When the top plate 18 rises, it pushes the extension plate 30 of the protective mechanism to slide outward, stretching the second tension spring 31. The end of the extension plate 30 is linked to the rotating plate 29 through the rotating component 32. Under the support of the fixing component 28, it unfolds into a triangular protective canopy, completely covering the exposed heat-conducting plate 21 and blocking external sparks from splashing. After the fire is extinguished, the reverse drive motor 6 is reversed. Under the combined action of the rebound force of the first tension spring 15, the contraction force of the second tension spring 31, and the weight of the heat sink, each component automatically resets to its initial state.

[0050] Example 2: In some embodiments, as a preferred embodiment of the present invention, such as... Figure 13 As shown, the control system installed inside the main body 1 of the device includes a distributed energy storage device 33, a dual-loop control module 34, a droop control module 35, and a PLC phase-locked loop 36. The distributed energy storage device 33, as an energy storage unit, uses a lithium-ion battery pack. The distributed energy storage device 33 is connected in sequence to a voltage inverter module 37 and a filter module 38. The voltage inverter module 37 uses IGBT technology to achieve efficient energy conversion. The output of the filter module 38 is connected to the AC power grid. The LC circuit design of the filter module 38 effectively suppresses harmonics. The input of the dual-loop control module 34 is connected to a built-in voltage / current acquisition unit 39. The high-precision sensor of the voltage / current acquisition unit 39 ensures data accuracy. The output of the dual-loop control module 34 controls the voltage inverter module 37. This closed-loop control achieves stable output, and the dual-loop control module 34 includes... The inner loop controller 41 and the Park conversion unit 40 are integrated. The PID algorithm of the inner loop controller 41 optimizes the dynamic response. The input of the droop control module 35 receives the output signal of the blocking block 10. This linkage design realizes the coordination of protection and control. The output of the droop control module 35 provides reference commands to the dual-loop control module 34. This hierarchical control improves the system stability. The droop control module 35 includes a power calculation unit 42 and an amplitude-frequency command generation unit 43. The fast algorithm of the power calculation unit 42 ensures real-time performance. The input of the PLC phase-locked loop 36 is connected to the voltage / current acquisition unit 39. The digital filtering technology of the PLC phase-locked loop 36 improves the anti-interference capability. The output of the PLC phase-locked loop 36 is connected to the amplitude-frequency command generation unit 43 of the droop control module 35 to realize dynamic parameter correction. This adaptive adjustment optimizes the grid adaptability.

[0051] The dual-loop control module 34 decouples the current / voltage signals along the dq axis through the Park transformation unit 40. The coordinate transformation of the Park transformation eliminates the three-phase imbalance, and the inner loop controller 41 performs the inner loop current control. The fast response of the inner loop control suppresses harmonic distortion. The amplitude and frequency command generation unit 43 of the droop control module 35 dynamically generates voltage amplitude and frequency commands based on the power calculation results and the phase signal of the PLC phase-locked loop 36. This collaborative control achieves the optimization of grid-connected power quality.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapidly isolating energy storage grid-connected device, comprising a device body (1) and a mounting base (5), characterized in that: It also includes a pull-down mechanism, an isolation mechanism, a reset mechanism, a synchronous drive mechanism, a protective mechanism, and a control system. The bottom of the device body (1) is fixedly connected to a base (2). The two sides of the device body (1) are provided with mounting slots (3). The inner side of the mounting slots (3) is fixedly connected to a heat sink (4), and the outer side of the heat sink (4) is provided with a heat dissipation groove. The pull-down mechanism is installed on the inner side of the base (2). The isolation mechanism is installed on one side of the mounting seat (5). The top inner side of the device body (1) is limited and slidably connected to two sets of symmetrically arranged sliding plates (12). The reset mechanism is installed between the two sets of sliding plates (12). The sliding plates (12) and the mounting seat (5) are fixedly connected to a connecting rope (16). The top of the device body (1) is slidably connected to a heat sink frame. The synchronous drive mechanism is installed between the heat sink frame and the sliding plates (12). The protective mechanism is installed on the upper side of the device body (1). The control system is installed on the inner side of the device body (1).

2. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, The pull-down mechanism includes a rotating rod (8) and a pull rope (9). A drive motor (6) is fixedly connected to the outside of the base (2), and a protective cover (7) is fixedly connected to the outside of the drive motor (6). The rotating rod (8) is rotatably connected to the inside of the base (2), and the rotating rod (8) is fixedly connected to one side of the output shaft of the drive motor (6). The pull rope (9) is fixedly connected to the outside of the rotating rod (8), and the end of the pull rope (9) passes through the base (2) and the device body (1) and is fixedly connected to the lower side of the mounting base (5).

3. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, The isolation mechanism includes a compression spring (11) and a blocking block (10). The compression spring (11) is fixedly connected to the inner side of the mounting base (5). The blocking block (10) is fixedly connected to the end of the compression spring (11) and is slidably connected to the inner side of the mounting base (5). The outer surface of the blocking block (10) abuts against the inner side of the device body (1).

4. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, The reset mechanism includes a locking block (14) and a first tension spring (15). A locking groove (13) is provided on the top inner side of the main body (1) of the device. The locking block (14) is fixedly connected to the upper side of the slide plate (12), and the locking block (14) is limited to slidingly connected to the inner side of the locking groove (13). The first tension spring (15) is fixedly connected between the two sets of locking blocks (14), and the two sets of slide plates (12) abut against each other.

5. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, A guide ring (17) is fixedly connected to the inner side of the main body (1) of the device, and the connecting rope (16) passes through the inner side of the guide ring (17).

6. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, The heat dissipation frame comprises a top plate (18), a bottom plate (19), a connecting plate (20), and a heat-conducting plate (21). The top plate (18) is placed on the upper side of the main body (1) of the device, and the bottom plate (19) is placed inside the main body (1) of the device. The connecting plate (20) and the heat-conducting plate (21) are fixedly connected between the top plate (18) and the bottom plate (19), and the connecting plate (20) and the heat-conducting plate (21) are slidably connected to the upper side of the main body (1). There are several sets of connecting plates (20) arranged horizontally, and there are two sets of heat-conducting plates (21) installed on both sides of the multiple sets of connecting plates (20). A sealing block (22) is fixedly connected to the upper side of the main body (1), and the connecting plate (20) and the heat-conducting plate (21) are slidably connected to the sealing block (22).

7. The rapidly isolable energy storage grid-connected device according to claim 6, characterized in that, The synchronous drive mechanism includes a horizontal toothed plate (23), a vertical toothed plate (24), a rotating shaft (25), a first gear (26), and a second gear (27). The horizontal toothed plate (23) is fixedly connected to the bottom of the slide plate (12), the vertical toothed plate (24) is fixedly connected to the outside of the heat-conducting plate (21), and the rotating shaft (25) is rotatably connected to the inside of the main body (1) of the device. The first gear (26) and the second gear (27) are fixedly connected to the outside of the rotating shaft (25) and arranged horizontally. The first gear (26) meshes with the horizontal toothed plate (23), and the second gear (27) meshes with the vertical toothed plate (24).

8. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, The protective mechanism includes a fixing member (28), a rotating plate (29), an extension plate (30), a second tension spring (31), and a rotating member (32). The fixing members (28) are in two sets and are symmetrically fixedly connected to the upper side of the main body (1) of the device. The rotating plate (29) is rotatably connected to the outside of the fixing member (28). One end of the second tension spring (31) is fixedly connected to the inside of the rotating plate (29), and the other end of the second tension spring (31) is fixedly connected to the extension plate (30). The extension plate (30) is slidably connected to the inner side of the rotating plate (29). The rotating component (32) is rotatably connected to the ends of the two sets of extension plates (30). The fixing component (28) and the rotating component (32) are both structures composed of fixing rods fixedly connected between the two sets of fixing plates. The rotating plate (29) is rotatably connected to the outside of the fixing rod installed inside the fixing component (28). The end of the extension plate (30) is rotatably connected to the outside of the fixing rod installed inside the rotating component (32).

9. The rapidly isolable energy storage grid-connected device according to claim 1, characterized in that, The control system includes a distributed energy storage device (33), a dual-loop control module (34), a droop control module (35), and a PLC phase-locked loop (36). The distributed energy storage device (33) is connected in sequence to a voltage inverter module (37) and a filter module (38). The output of the filter module (38) is connected to the AC power grid. The input of the dual-loop control module (34) is connected to a built-in voltage / current acquisition unit (39). The output of the dual-loop control module (34) controls the voltage inverter module (37), and the dual-loop control module (34) includes an inner loop controller (41). The droop control module (35) receives the output signal of the blocking block (10) at its input terminal and provides reference instructions to the dual-loop control module (34) at its output terminal. The droop control module (35) includes a power calculation unit (42) and an amplitude-frequency instruction generation unit (43). The input terminal of the PLC phase-locked loop (36) is connected to the voltage / current acquisition unit (39), and the output terminal of the PLC phase-locked loop (36) is connected to the amplitude-frequency instruction generation unit (43) of the droop control module (35) to realize dynamic parameter correction.

10. The rapidly isolable energy storage grid-connected device according to claim 9, characterized in that, The dual-loop control module (34) decouples the current / voltage signal along the dq axis through the Park transformation unit (40), and the inner loop controller (41) performs the inner loop control of the current. The amplitude-frequency command generation unit (43) of the droop control module (35) dynamically generates voltage amplitude and frequency commands based on the power calculation results and the phase signal of the PLC phase-locked loop (36).

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