A new energy power system low frequency off-grid automatic control method and device

Abstract

The present invention relates to the technical field of electric power system, specifically, a low-frequency off-grid automatic control method and device for a new energy electric power system, a fixed platform, and an automatic control device further comprising: an adjustment component is installed on the upper surface of the fixed platform, for actually removing the load; the adjustment component comprises a primary rotating member, a secondary rotating member and a tertiary rotating member, the primary rotating member is completely identical to the tertiary rotating member, the primary rotating member contacts one of the secondary rotating members, and the other secondary rotating member contacts the tertiary rotating member; a crossover connector is fixedly arranged at the bottom of the tertiary rotating member. It can realize the simultaneous opening and closing of multiple load switches, and can also realize the simultaneous opening of some load switches according to the actual situation of the power grid, while the rest are in a closed state. Through the setting of the crossover connector, two non-adjacent load switches can be controlled to be connected, and two non-adjacent load switches can be disconnected.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to a low-frequency off-grid automatic control method and device for a new energy electric power system. Background Art

[0002] Low-frequency disconnection automatic control is a control strategy used in power systems, especially in distributed energy systems such as microgrids or virtual power plants, to automatically disconnect distributed energy systems from the grid when the grid frequency drops to a specific low-frequency threshold. A low-frequency threshold is set according to the safety standards for grid operation and the characteristics of distributed energy systems. When the monitored grid frequency is lower than this threshold, the system will trigger the disconnection action. By disconnecting the distributed energy system from the grid in a timely manner, the grid frequency can be prevented from further decreasing, thereby protecting the stability of the grid.

[0003] The patent with authorization announcement number CN111276358B discloses an automatic control device for an electric isolating switch, including a switching power supply, a control power switch, an electric opening and closing mechanism, a phase loss monitoring circuit, a phase voltage balance circuit and a control circuit; the opening and closing actions can be controlled on the ground. As long as any phase of a transmission line is missing or the voltage is unbalanced, the power isolating switch body knife switch can be automatically disconnected. After the power supply line is restored, the knife switch can be automatically closed to restore power to the electrical equipment.

[0004] The above patent can cut off the power to multiple power isolating switch bodies at the same time when the voltage is unstable. In actual use, when a transmission line becomes unstable, the remaining transmission lines may be in normal working condition and may not need to be completely disconnected. When all are disconnected, the range of electricity consumption that may be affected is relatively wide. In the actual power transmission process, direct power outage has a greater impact on the power supply area. Summary of the invention

[0005] In response to the problems in the prior art, the present invention provides a new energy power system low-frequency disconnection automatic control method and device, which can realize the simultaneous opening and closing of multiple load switches, and can also realize the simultaneous opening of some load switches and the closing of the others according to the actual situation of the power grid. By setting a crossing connection piece, two non-adjacent load switches can be controlled to be connected. During the rotation of the first-stage rotating part, the extension rod is driven to rotate synchronously through the matching teeth, and the extension rod drives the third-stage rotating part to rotate synchronously through the second electric control push rod and the cross bar, thereby realizing the disconnection of two non-adjacent load switches.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a new energy power system low-frequency off-grid automatic control device, including a fixed platform, the automatic control device also includes an adjustment component, the adjustment component is installed on the upper surface of the fixed platform, and is used to actually cut off the load; the adjustment component includes a primary rotating part, a secondary rotating part and a tertiary rotating part, the primary rotating part is exactly the same as the tertiary rotating part, the primary rotating part is in contact with one of the secondary rotating parts, and the other secondary rotating part is in contact with the tertiary rotating part; a crossing connecting part is fixedly arranged at the bottom of the tertiary rotating part, a matching connecting part is arranged on the outer wall of the primary rotating part, and the tertiary rotating part and the primary rotating part can be connected through the crossing connecting part and the matching connecting part.

[0007] Specifically, the spanning connecting member includes an outer supporting plate, a cross bar is fixedly connected to the side of the outer supporting plate close to the primary rotating member, a second electric control push rod is fixedly connected to the end of the cross bar away from the outer supporting plate, an extension rod is fixedly connected to the telescopic end of the second electric control push rod, and a plurality of extension rods are provided with chamfers at one end away from the second electric control push rod, a circle of matching teeth is fixedly connected to the outer wall of the primary rotating member, the matching teeth are provided with chamfers close to the side of the second electric control push rod, and the extension rod is adapted to the matching teeth.

[0008] Specifically, the adjustment component also includes a rotating main shaft, which includes a first control shaft, a second control shaft and a third control shaft. Both ends of the second control shaft are connected to secondary rotating parts, the end of the first control shaft close to the second control shaft is connected to the primary rotating part, and the end of the third control shaft close to the second control shaft is connected to the tertiary rotating part.

[0009] Specifically, the first-stage rotating member, the second-stage rotating member and the third-stage rotating member all include a connecting shell, the outer wall of the connecting shell is provided with a clearance groove, a plug-in block is rotatably connected in the clearance groove, the inner wall of the plug-in block is arc-shaped, an arc-shaped clamping spring is fixedly connected to the outer wall of the plug-in block, and the other end of the arc-shaped clamping spring is fixedly connected to the inner wall of the clearance groove.

[0010] Specifically, the inner walls of the first-stage rotating member, the second-stage rotating member and the third-stage rotating member are all rotatably provided with inner support columns, the outer walls of the inner support columns are provided with matching grooves, the plug-in blocks are placed in the matching grooves, and the outer walls of the inner support columns at one end away from the matching grooves are provided with a plug-in groove.

[0011] Specifically, a third electric control push rod is fixedly connected to the plug-in slot of the inner support column arranged in the middle of the secondary rotating member, and a connecting block is fixedly connected to the telescopic end of the third electric control push rod, and a plurality of connecting blocks are connected by a stabilizing sheet.

[0012] Specifically, a support frame is fixedly connected to the upper surface of the fixed platform, a lap element is fixedly installed on the upper surface of the support frame, a rotating connecting frame is fixedly connected to the outer wall of the rotating main shaft, a control support rod is rotatably connected to the middle of the rotating connecting frame, and a load switch is rotatably connected to one end of the control support rod away from the rotating connecting frame, which can be connected to the lap element through the load switch.

[0013] Specifically, a coordination drive assembly is provided on one side of the fixed platform, and the coordination drive assembly includes an installation protrusion plate, which is fixedly connected to the side wall of the fixed platform, and a first electric control push rod is hinged on one side of the installation protrusion plate. The telescopic end of the first electric control push rod is rotatably connected to a rotating crank, and the rotating crank is rotatably connected to a rotating disk at one end away from the first electric control push rod, and the rotating disk is fixedly connected to the end of the rotating main shaft.

[0014] The present invention also provides a new energy power system low-frequency off-grid automatic control method, the method comprising the following steps:

[0015] Step 1: including a monitoring system for electrical signal detection, the monitoring system including an electric power monitoring module, the electric power monitoring module is used for monitoring and collecting data of grid frequency and current signal and calculating the deviation between the data of grid frequency and current signal and fundamental frequency;

[0016] Step 2: The monitoring system is connected to a control system for receiving monitoring system signals and issuing action instructions. The control system includes a valve control module for controlling the on and off of the valve body. The valve control module includes a coordination drive component and an adjustment component. The adjustment component is used to actually cut off the load, and the coordination drive component is used to provide power to the adjustment component.

[0017] Beneficial effects of the present invention:

[0018] (1) The present invention discloses a new energy power system low-frequency disconnection automatic control method and device. Compared with the prior art, the present application can realize the simultaneous opening and closing of multiple load switches, and can also realize the simultaneous opening of some load switches and the closing of the others according to the actual situation of the power grid. By setting a cross-connection member, two non-adjacent load switches can be controlled to be connected. During the rotation of the first-stage rotating member, the extension rod is driven to rotate synchronously through the matching teeth. The extension rod drives the third-stage rotating member to rotate synchronously through the second electric control push rod and the cross rod, thereby realizing the disconnection of two non-adjacent load switches.

[0019] (2) The method and device for automatic control of low-frequency disconnection of a new energy power system described in the present invention monitors the grid frequency through a monitoring system at the same time. When the monitored grid frequency is lower than a preset low-frequency threshold, the system will make a threshold judgment. This threshold is set according to the operating characteristics of the grid and the actual situation of the distributed energy system, and is intended to ensure that protective measures can be taken in a timely manner when the grid frequency is abnormal, strengthen the monitoring and prediction of the power system, respond to abnormal conditions of the power system in a timely manner, improve the reliability and accuracy of the protection device, reduce the occurrence of false operations and failures, strengthen the prediction and scheduling of new energy power generation, and reduce its impact on the fluctuation of the grid frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a flow chart of a low-frequency off-grid automatic control method for a new energy power system;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of a low-frequency off-grid automatic control device for a new energy power system according to the present invention;

[0023] Figure 3 For the present invention Figure 2 Axis view of

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the adjustment component of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating main shaft of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the spanning connector of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the secondary rotating member of the present invention;

[0028] Figure 8 This is an exploded view of the secondary rotating part of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the secondary rotating member of the present invention.

[0030] In the figure: 1, fixed platform; 11, support frame; 21, overlap element; 31, mounting protrusion plate; 32, first electric control push rod; 33, rotating crank; 34, rotating disk;

[0031] 4. Adjustment assembly; 41. Rotational main shaft; 411. First control shaft; 412. Second control shaft; 413. Third control shaft; 42. Rotational connecting frame; 43. Control support rod; 44. Load switch; 46. Primary rotating member; 47. Secondary rotating member; 471. Displacement groove; 472. Arc-shaped pressing spring; 473. Plug-in block; 49. Third-stage rotating member;

[0032] 9. Inner support column; 91. Plug-in slot; 92. Third electric control push rod; 93. Matching slot; 94. Stabilizing sheet; 95. Connecting block; 6. Matching teeth;

[0033] 7. Crossing connector; 71. External support plate; 72. Crossbar; 73. Second electric control push rod; 74. Extension rod. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] like Figure 1-Figure 9 As shown, a new energy power system low-frequency off-grid automatic control device of the present invention includes a fixed platform 1, and the automatic control device also includes an adjustment component 4, which is installed on the upper surface of the fixed platform 1 and is used to actually cut off the load; the adjustment component 4 includes a primary rotating member 46, a secondary rotating member 47 and a tertiary rotating member 49, the primary rotating member 46 is exactly the same as the tertiary rotating member 49, the primary rotating member 46 is in contact with one of the secondary rotating members 47, and the other secondary rotating member 47 is in contact with the tertiary rotating member 49; a crossing connector 7 is fixedly provided at the bottom of the tertiary rotating member 49, and a matching connector is provided on the outer wall of the primary rotating member 46, and the tertiary rotating member 49 and the primary rotating member 46 can be connected through the crossing connector 7 and the matching connector.

[0036] The opening and closing of the load switch 44 can be controlled by setting the adjustment component 4. During use, the opening and closing of one of the load switches 44 can be controlled separately, and the opening and closing of multiple load switches 44 can also be controlled, and automatic off-grid control can be achieved according to the actual grid frequency; through the setting of the primary rotating member 46, the secondary rotating member 47 and the tertiary rotating member 49, in the process of controlling the opening and closing of the load switch 44, the control of two adjacent load switches 44 is achieved by connecting and disconnecting the primary rotating member 46 and the secondary rotating member 47. When the primary rotating member 46 and the secondary rotating member 47 are connected, the primary rotating member 46 can rotate when it is turned. The secondary rotating member 47 is driven to rotate, so as to realize the simultaneous disconnection or closing of two load switches 44. When the primary rotating member 46, the secondary rotating member 47 and the tertiary rotating member 49 are connected, the secondary rotating member 47 and the tertiary rotating member 49 can be driven to rotate simultaneously during the rotation of the primary rotating member 46, so as to realize the simultaneous control of multiple load switches 44. When the primary rotating member 46 and the secondary rotating member 47 are disconnected, the primary rotating member 46 and the tertiary rotating member 49 are connected through the crossing connecting member 7, two non-adjacent crossing connections are realized. When the primary rotating member 46 rotates, the tertiary rotating member 49 is driven to rotate, so as to realize the control of two non-adjacent valve bodies.

[0037] Specifically, the spanning connector 7 includes an outer support plate 71, the outer support plate 71 is fixedly connected to a cross bar 72 on one side close to the primary rotating member 46, the cross bar 72 is fixedly connected to a second electrically controlled push rod 73 on one end away from the outer support plate 71, the telescopic end of the second electrically controlled push rod 73 is fixedly connected to an extension rod 74, and a plurality of extension rods 74 are all provided with chamfers on one end away from the second electrically controlled push rod 73, a circle of mating teeth 6 is fixedly connected to the outer wall of the primary rotating member 46, the mating teeth 6 are provided with chamfers on one side close to the second electrically controlled push rod 73, and the extension rod 74 is adapted to the mating teeth 6.

[0038] By setting the crossing connecting member 7, two non-adjacent load switches 44 can be controlled to be connected. When it is detected that the frequency of the corresponding circuit grid controlled by the first-stage rotating member 46 and the third-stage rotating member 49 is lower than the preset range of the fundamental frequency, the telescopic end of the second electrically controlled push rod 73 extends, and the second electrically controlled push rod 73 pushes the extension rod 74 to move toward the first-stage rotating member 46. At this time, the extension rod 74 is inserted into the gap of the mating tooth 6. The end of the extension rod 74 and the mating tooth 6 are both provided with chamfers, which can achieve a smoother connection process.

[0039] During the rotation of the primary rotating member 46, the extending rod 74 is driven to rotate synchronously through the matching teeth 6, and the extending rod 74 drives the tertiary rotating member 49 to rotate synchronously through the second electric control push rod 73 and the cross bar 72, thereby realizing the disconnection of two non-adjacent load switches 44.

[0040] Specifically, the adjustment component 4 also includes a rotating main shaft 41, and the rotating main shaft 41 includes a first control shaft 411, a second control shaft 412 and a third control shaft 413. Both ends of the second control shaft 412 are connected to a secondary rotating member 47, the end of the first control shaft 411 close to the second control shaft 412 is connected to the primary rotating member 46, and the end of the third control shaft 413 close to the second control shaft 412 is connected to the tertiary rotating member 49.

[0041] During the rotation process, the first control shaft 411 can drive the second control shaft 412 to rotate simultaneously through the connection between the primary rotating member 46 and the secondary rotating member 47. At this time, the third control shaft 413 will not rotate. When the primary rotating member 46 and the secondary rotating member 47, and the secondary rotating member 47 and the tertiary rotating member 49 are connected at the same time, when the first control shaft 411 rotates, the second control shaft 412 and the third control shaft 413 rotate synchronously.

[0042] Specifically, the first-stage rotating member 46, the second-stage rotating member 47 and the third-stage rotating member 49 all include a connecting shell, the outer wall of the connecting shell is provided with a clearance groove 471, the inside of the clearance groove 471 is rotatably connected with a plug-in block 473, the inner wall of the plug-in block 473 is arc-shaped, the outer wall of the plug-in block 473 is fixedly connected with an arc-shaped clamping spring 472, and the other end of the arc-shaped clamping spring 472 is fixedly connected to the inner wall of the clearance groove 471; the inner walls of the first-stage rotating member 46, the second-stage rotating member 47 and the third-stage rotating member 49 are rotatably provided with an inner support column 9, the outer wall of the inner support column 9 is provided with a matching groove 93, the plug-in block 473 is placed in the matching groove 93, and the outer wall of the inner support column 9 away from the matching groove 93 is provided with a plug-in groove 91.

[0043] The primary rotating member 46, the secondary rotating member 47 and the tertiary rotating member 49 are fixedly connected to the corresponding first control shaft 411, the second control shaft 412 and the third control shaft 413. During the rotation of the first control shaft 411, the second control shaft 412 and the third control shaft 413, the corresponding primary rotating member 46, the secondary rotating member 47 and the tertiary rotating member 49 will be driven to rotate. When pushed by the clamping spring 472, the plug-in block 473 can be pushed into the inside of the shell, and the clearance groove 471 can play the role of storage and installation.

[0044] The plug-in block 473 can be inserted into the matching groove 93 to achieve transmission by connecting two adjacent inner support columns 9.

[0045] Specifically, a third electrically-controlled push rod 92 is fixedly connected to the insertion slot 91 of the inner support column 9 provided in the middle of the secondary rotating member 47 , and a connecting block 95 is fixedly connected to the telescopic end of the third electrically-controlled push rod 92 , and a plurality of connecting blocks 95 are connected via a stabilizing sheet 94 .

[0046] When the secondary rotating member 47 is connected to the primary rotating member 46, the telescopic end of the third electrically controlled push rod 92 connected to the plug-in slot 91 of the inner support column 9 set in the middle of the secondary rotating member 47 is extended to push the connecting block 95 to slide, and the connecting block 95 slides into the plug-in slot 91 of the inner support column 9 set in the middle of the primary rotating member 46. During the rotation of the primary rotating member 46, the secondary rotating member 47 is also driven to rotate. The stabilizing plate 94 makes the multiple connecting blocks 95 more stable during the movement.

[0047] Specifically, a support frame 11 is fixedly connected to the upper surface of the fixed platform 1, a lap element 21 is fixedly installed on the upper surface of the support frame 11, a rotating connecting frame 42 is fixedly connected to the outer wall of the rotating main shaft 41, a control support rod 43 is rotatably connected to the middle part of the rotating connecting frame 42, and a load switch 44 is rotatably connected to one end of the control support rod 43 away from the rotating connecting frame 42, and can be connected to the lap element 21 through the load switch 44.

[0048] The rotating main shaft 41 can drive the connecting frame 42 to rotate together during the rotation process. The connecting frame 42 can close or disconnect the load switch 44 and the bridge element 21 by controlling the support rod 43 to rotate during the rotation process, which is convenient and quick.

[0049] Specifically, a coordination drive assembly is provided on one side of the fixed platform 1, and the coordination drive assembly includes an installation protrusion plate 31, and the installation protrusion plate 31 is fixedly connected to the side wall of the fixed platform 1. A first electric control push rod 32 is hinged on one side of the installation protrusion plate 31, and the telescopic end of the first electric control push rod 32 is rotatably connected to a rotating crank 33, and the rotating crank 33 is rotatably connected to a rotating disk 34 at one end away from the first electric control push rod 32, and the rotating disk 34 is fixedly connected to the end of the rotating main shaft 41.

[0050] The rotating main shaft 41 is driven to rotate by the coordinated driving assembly, and the telescopic end of the first electric control push rod 32 is controlled to extend, so that the first electric control push rod 32 pushes the rotating crank 33 to rotate, and during this process, the first electric control push rod 32 rotates relative to the connection between the mounting protruding plate 31. The rotating crank 33 drives the rotating disk 34 to rotate, and the rotating disk 34 drives the rotating main shaft 41 to rotate during the rotation process.

[0051] The present invention also provides a new energy power system low-frequency grid-off automatic control method, including a monitoring system for electrical signal detection, the monitoring system including an electric power monitoring module, the electric power monitoring module is used for monitoring and collecting data of grid frequency and current signals and calculating the deviation between the data of grid frequency and current signals and fundamental frequency; the monitoring system is connected to a control system for receiving monitoring system signals and issuing action instructions, the control system including a valve control module for controlling the on and off of a valve body, the valve control module including a coordination drive component and an adjustment component 4, the adjustment component 4 is used for actually cutting off the load, and the coordination drive component is used for providing power to the adjustment component 4.

[0052] The grid frequency is monitored in real time through the monitoring system, and the grid frequency is monitored through the power monitoring module. At the same time, the real-time grid frequency is compared with the threshold (the threshold refers to the lowest or highest value that an effect can produce, that is, the limit value of the system or equipment triggering a certain action or response under specific conditions). The low-frequency threshold refers to the limit frequency at which the system automatically triggers the off-grid control logic and disconnects the distributed energy system from the grid when the grid frequency drops to a certain value (i.e., the threshold). The setting of this threshold is based on the safe and stable operation requirements of the grid and the characteristics of the distributed energy system, and is intended to prevent equipment damage and system instability that may be caused by too low grid frequency.

[0053] The grid frequency is monitored simultaneously through the monitoring system. When the monitored grid frequency is lower than the preset low-frequency threshold, the system will make a threshold judgment. This threshold is set according to the operating characteristics of the grid and the actual situation of the distributed energy system. It aims to ensure that protective measures can be taken in time when the grid frequency is abnormal.

[0054] When the grid frequency exceeds the threshold range, the power monitoring module monitors and finds that it exceeds the preset range through data comparison. At this time, the monitoring system will send an electrical signal to the control system, and send the coordinated drive member to work through the valve control module of the control system, and control the adjustment component 4 to work at the same time, and control the corresponding primary rotating member 46, secondary rotating member 47 and tertiary rotating member 49 to rotate through the adjustment component 4, so as to achieve the purpose of controlling the on and off of the load switch 44. It can strengthen the monitoring and prediction of the power system, respond to abnormal conditions of the power system in time, improve the reliability and accuracy of the protection device, reduce the occurrence of malfunctions and failures, strengthen the prediction and scheduling of new energy power generation, and reduce its impact on the fluctuation of the grid frequency.

[0055] Working principle: The grid frequency is monitored in real time through the monitoring system, and the grid frequency is monitored through the power monitoring module. At the same time, the real-time grid frequency is compared with the threshold. When the grid frequency exceeds the threshold range, the power monitoring module detects through data comparison that it exceeds the preset range. At this time, the monitoring system will send an electrical signal to the control system, and send the coordination drive part through the valve control module of the control system, and control the adjustment component 4 to work at the same time. The corresponding first-stage rotating part 46, second-stage rotating part 47 and third-stage rotating part 49 are controlled to rotate through the adjustment component 4, so as to achieve the purpose of controlling the on and off of the load switch 44.

[0056] The regulating assembly 4 can be controlled by the valve control module. In the process of controlling the disconnection and closing of the load switch 44, the control of two adjacent load switches 44 is achieved by connecting and disconnecting the primary rotating member 46 and the secondary rotating member 47. When the primary rotating member 46 and the secondary rotating member 47 are connected, the primary rotating member 46 can drive the secondary rotating member 47 to rotate when rotating, so as to disconnect or close the two load switches 44 at the same time. When the primary rotating member 46, the secondary rotating member 47 and the tertiary rotating member 49 are connected, the secondary rotating member 47 and the tertiary rotating member 49 can be driven to rotate at the same time during the rotation of the primary rotating member 46, so as to achieve simultaneous control of multiple load switches 44. When the primary rotating member 46 and the secondary rotating member 47 are disconnected, the primary rotating member 46 and the tertiary rotating member 49 are connected through the cross-connecting member 7, so as to achieve two non-adjacent cross-connections. When the primary rotating member 46 rotates, the tertiary rotating member 49 is driven to rotate, so as to achieve control of two non-adjacent valve bodies.

[0057] By setting the spanning connector 7, two non-adjacent load switches 44 can be controlled to be connected. During the rotation of the primary rotating member 46, the extension rod 74 is driven to rotate synchronously through the matching tooth 6, and the extension rod 74 drives the tertiary rotating member 49 to rotate synchronously through the second electric control push rod 73 and the cross bar 72, so as to disconnect the two non-adjacent load switches 44; when the secondary rotating member 47 is connected to the primary rotating member 46, the telescopic end of the third electric control push rod 92 connected to the plug-in slot 91 of the inner support column 9 set in the middle of the secondary rotating member 47 is extended to push the connecting block 95 to slide, and the connecting block 95 slides into In the plug-in slot 91 of the inner support column 9 arranged in the middle part of the first-stage rotating member 46, the second-stage rotating member 47 is driven to rotate at the same time during the rotation of the first-stage rotating member 46. The first control shaft 411 can drive the second control shaft 412 to rotate at the same time through the connection between the first-stage rotating member 46 and the second-stage rotating member 47 during the rotation. At this time, the third control shaft 413 will not rotate. When the first-stage rotating member 46 and the second-stage rotating member 47, and the second-stage rotating member 47 and the third-stage rotating member 49 are connected at the same time, when the first control shaft 411 rotates, the second control shaft 412 and the third control shaft 413 rotate synchronously.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-frequency off-grid automatic control device for a new energy power system, comprising a fixed platform (1), characterized in that: The automatic control device also includes: An adjustment component (4), the adjustment component (4) being mounted on the upper surface of the fixed platform (1) and being used for actually removing the load; The adjustment assembly (4) comprises a primary rotating member (46), a secondary rotating member (47) and a tertiary rotating member (49), wherein the primary rotating member (46) is identical to the tertiary rotating member (49), the primary rotating member (46) is in contact with one of the secondary rotating members (47), and the other of the secondary rotating members (47) is in contact with the tertiary rotating member (49); A spanning connection piece (7) is fixedly provided at the bottom of the third-stage rotating member (49), and a matching connection piece is provided on the outer wall of the first-stage rotating member (46), and the third-stage rotating member (49) and the first-stage rotating member (46) can be connected via the spanning connection piece (7) and the matching connection piece; The spanning connecting member (7) comprises an outer supporting plate (71), a cross bar (72) is fixedly connected to a side of the outer supporting plate (71) close to the primary rotating member (46), a second electric control push rod (73) is fixedly connected to an end of the cross bar (72) away from the outer supporting plate (71), an extension rod (74) is fixedly connected to the telescopic end of the second electric control push rod (73), a plurality of extension rods (74) are chamfered at one end away from the second electric control push rod (73), a circle of matching teeth (6) is fixedly connected to the outer wall of the primary rotating member (46), a chamfer is provided on a side of the matching teeth (6) close to the second electric control push rod (73), and the extension rod (74) is matched with the matching teeth (6); The adjustment assembly (4) further comprises a rotating main shaft (41), wherein the rotating main shaft (41) comprises a first control shaft (411), a second control shaft (412) and a third control shaft (413), both ends of the second control shaft (412) are connected to a secondary rotating member (47), an end of the first control shaft (411) close to the second control shaft (412) is connected to a primary rotating member (46), and an end of the third control shaft (413) close to the second control shaft (412) is connected to a tertiary rotating member (49).

2. According to claim 1, a new energy power system low-frequency off-grid automatic control device is characterized by: The first-stage rotating member (46), the second-stage rotating member (47) and the third-stage rotating member (49) all comprise a connecting shell, the outer wall of the connecting shell is provided with a clearance groove (471), a plug-in block (473) is rotatably connected in the clearance groove (471), the inner wall of the plug-in block (473) is arc-shaped, the outer wall of the plug-in block (473) is fixedly connected with an arc-shaped pressing spring (472), and the other end of the arc-shaped pressing spring (472) is fixedly connected to the inner wall of the clearance groove (471).

3. According to claim 2, a new energy power system low-frequency off-grid automatic control device is characterized by: The first-stage rotating member (46), the second-stage rotating member (47) and the third-stage rotating member (49) are all rotatably provided with inner support columns (9), the outer walls of the inner support columns (9) are provided with matching grooves (93), the plug-in blocks (473) are placed in the matching grooves (93), and the outer walls of the inner support columns (9) at one end away from the matching grooves (93) are provided with plug-in grooves (91).

4. A low-frequency off-grid automatic control device for a new energy power system according to claim 3, characterized in that: A third electric control push rod (92) is fixedly connected to the insertion slot (91) of the inner support column (9) provided in the middle of the secondary rotating member (47), a connecting block (95) is fixedly connected to the telescopic end of the third electric control push rod (92), and a plurality of connecting blocks (95) are connected via a stabilizing sheet (94).

5. According to claim 1, a new energy power system low-frequency off-grid automatic control device is characterized by: The upper surface of the fixed platform (1) is fixedly connected to a support frame (11), and a lap joint element (21) is fixedly installed on the upper surface of the support frame (11). The outer wall of the rotating main shaft (41) is fixedly connected to a rotating connecting frame (42), and a control support rod (43) is rotatably connected to the middle of the rotating connecting frame (42). The control support rod (43) is rotatably connected to a load switch (44) at one end away from the rotating connecting frame (42), and can be connected to the lap joint element (21) via the load switch (44).

6. A low-frequency off-grid automatic control device for a new energy power system according to claim 5, characterized in that: A coordinated drive assembly is provided on one side of the fixed platform (1), the coordinated drive assembly comprising a mounting protruding plate (31), the mounting protruding plate (31) being fixedly connected to the side wall of the fixed platform (1), a first electrically controlled push rod (32) being hingedly connected to one side of the mounting protruding plate (31), a retractable end of the first electrically controlled push rod (32) being rotatably connected to a rotating crank (33), an end of the rotating crank (33) away from the first electrically controlled push rod (32) being rotatably connected to a rotating disk (34), and the rotating disk (34) being fixedly connected to the end of a rotating main shaft (41).

7. A method for using a new energy power system low-frequency off-grid automatic control device according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step 1: including a monitoring system for electrical signal detection, the monitoring system including an electric power monitoring module, the electric power measurement module is used for monitoring and collecting data of grid frequency and current signal and calculating the deviation between the data of grid frequency and current signal and fundamental frequency; Step 2: The monitoring system is connected to a control system for receiving monitoring system signals and issuing action instructions, the control system includes a valve control module for controlling the on and off of the valve body, the valve control module includes a coordination drive component and an adjustment component (4), the adjustment component (4) is used to actually cut off the load, and the coordination drive component is used to provide power to the adjustment component (4).

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