Connecting mechanism and AGC, AVC and primary frequency modulation control system

Abstract

The utility model relates to the technical field of electrical control, in particular to a connecting mechanism and an AGC, AVC and primary frequency modulation control system, which comprises an operation assembly, a fixed holding rod and an adjusting holding rod arranged at the bottom of the fixed holding rod, the fixed holding rod is far away from a binding post needing to be clamped, and an operator can be in a relatively safe position when connecting the binding post; the fixing assembly and the operation assembly can be folded, various included angles can be adjusted between the fixing assembly and the operation assembly, the fixing assembly comprises an upper clamping jaw arranged at the top of the fixing holding rod and a lower clamping jaw arranged at the bottom of the upper clamping jaw, and the included angle between the operation assembly and the fixing assembly can be adjusted through the adjusting holding rod, so that the device is suitable for various operation scenes; the AGC, AVC and primary frequency modulation control system can realize a primary frequency modulation function and an AGC coordination control function at the same time, the real-time performance and reliability of the system are improved, the operation load drop of the system is dispersed, and when the upper computer breaks down, the lower computer can normally realize the primary frequency modulation function.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical control, in particular to a connecting mechanism and an AGC, AVC and primary frequency modulation control system. Background Art

[0002] In the existing system, the AGC (Automatic Generation Control) and AVC (Automatic Voltage Control) substation control quantities, including active power and voltage at the grid connection point, are collected by the integrated automatic system and forwarded to the AGC and AVC substations via telecontrol. This results in communication delays and poor reliability. This can lead to active power or voltage overshoot and poor regulation performance. Furthermore, the AGC substation and the primary frequency regulation system are independent systems and may be manufactured by different manufacturers. The coordinated control logic between the primary frequency regulation and AGC is difficult to implement and is subject to delays. When collecting data in the AGC system, it is typically necessary to connect high-voltage terminals using terminal clamps to ensure accurate data collection and stable system operation. On-site, the terminals are housed in a protective box, leaving little room for operation and making multiple connections inconvenient. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the technical problem in the above-mentioned prior art that the on-site terminal is arranged in a protection box, the operating space is small, and the connection operation is inconvenient, the present utility model is proposed.

[0005] The utility model aims to provide a connecting mechanism.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a connecting mechanism, which includes an operating component, including a fixed grip and an adjustment grip arranged at the bottom of the fixed grip; and a fixing component, including an upper clamping jaw arranged at the top of the fixed grip and a lower clamping jaw arranged at the bottom of the upper clamping jaw.

[0007] As a preferred solution of the connecting mechanism of the present invention, a rotating frame is provided on the top of the fixed handle, a first elastic member is provided on the bottom of the fixed handle, and one end of the first elastic member away from the fixed handle is connected to the adjustment handle.

[0008] As a preferred solution of the connection mechanism of the present invention, a connection structure is provided on the top of the adjustment handle, and an arc-shaped connecting frame is provided on the side of the fixed handle.

[0009] As a preferred solution of the connecting mechanism of the present invention, the connecting structure includes a pry bar arranged on the top of the adjustment handle, a connecting plate is provided on the top of the pry bar, the connecting plate is made of elastic material, and a ring is provided on the top of the connecting plate.

[0010] As a preferred solution of the connecting mechanism of the present invention, a rotating rod is provided on the inner wall of the rotating frame, the top of the rotating rod passes through the rotating frame, a terminal is provided on the top of the rotating rod, a sliding rod is provided on the outer wall of the rotating rod, and the side of the rotating rod is connected to the upper clamping claw.

[0011] As a preferred solution of the connecting mechanism of the utility model, the side surface of the lower clamping jaw is connected to the rotating rod, the side surface of the lower clamping jaw is provided with a guide ring, the bottom of the lower clamping jaw is provided with a top ring, and the bottom of the rotating rod is provided with a locking structure.

[0012] As a preferred solution of the connecting mechanism of the present utility model, the locking structure includes a lock seat arranged at the bottom of the rotating rod, a rotating shaft is arranged inside the lock seat, the top of the rotating shaft is connected to the rotating rod, a spline is arranged at the top of the rotating shaft, a retaining ring is arranged on the outer wall of the spline, a slider is arranged on the side of the retaining ring, a second elastic member is arranged at the bottom of the retaining ring, and the bottom of the second elastic member is connected to the lock seat.

[0013] The beneficial effects of the connection mechanism of the present invention are as follows: the part for clamping the terminal and the operating part can be folded, the clamping part can be extended into a narrow operating space for clamping, and the operator performs the clamping operation at a remote end, making the connection more convenient and safer.

[0014] Another object of the present invention is to provide an AGC, AVC, and primary frequency modulation control system, which aims to solve the problem that the active power collected by the AGC substation and the primary frequency modulation system are from different sources, the primary frequency modulation and AGC coordinated control logic is difficult to implement, and the coordination delay is large.

[0015] In order to solve the above technical problems, the present invention also provides the following technical solutions: an AGC, AVC, and primary frequency modulation control system, which includes a connecting mechanism; and an upper part, including an operator station, a first host and a second host; a switching part; and a lower part, including a first PLC and a second PLC.

[0016] As a preferred solution of the AGC, AVC, and primary frequency modulation control system of the present invention, the operator station is connected to the switching part, the first host is connected to the switching part, and the second host is connected to the switching part.

[0017] As a preferred solution of the AGC, AVC, and primary frequency modulation control system of the utility model, wherein: the first PLC includes a power supply, a CPU, an AI, and a DI, the AI includes a power transmitter, a voltage transmitter, and a frequency transmitter, the second PLC has the same structure as the first PLC, the first PLC is connected to the switching part, and the second PLC is connected to the switching part.

[0018] The beneficial effects of the AGC, AVC, and primary frequency modulation control system of the present invention are as follows: the primary frequency modulation function and the AGC coordinated control function can be realized simultaneously, thereby improving the real-time performance and reliability of the system while dispersing the system operation load and reducing the system complexity; and when a fault occurs in the upper computer, the lower computer can also realize the primary frequency modulation function normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural diagram of the connecting mechanism in the present utility model.

[0021] Figure 2 It is a structural diagram of the operating component in the utility model.

[0022] Figure 3 It is a structural schematic diagram of the fixing component in the utility model.

[0023] Figure 4 This is a schematic diagram of the control system in the present invention.

[0024] Figure 5 This is the control logic diagram of the control system in this utility model. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1, with reference to Figures 1 to 3 , which is the first embodiment of the present utility model, this embodiment provides a connecting mechanism, including an operating component 100, including a fixed grip 101 and an adjustment grip 104 arranged at the bottom of the fixed grip 101, the fixed grip 101 is away from the terminal 202 that needs to be clamped, and the operator can be in a relatively safe position when connecting the terminal 202; and a fixing component 200, the fixing component 200 and the operating component 100 can be folded and various angles can be adjusted, including an upper clamping jaw 203 arranged at the top of the fixed grip 101 and a lower clamping jaw 204 arranged at the bottom of the upper clamping jaw 203, the upper clamping jaw 203 and the lower clamping jaw 204 cooperate to clamp the terminal 202, the adjustment grip 104 can control the clamping or loosening of the clamping jaws, and can also adjust the angle between the operating component 100 and the fixed component 200 to adapt to various operating scenarios.

[0029] Usage process: Before connecting the terminal 202, use the adjustment handle 104 to adjust the angle between the fixing component 200 and the operating component 100 according to the on-site scenario, extend the fixing component 200 to the periphery of the terminal 202 to be connected, and use the operating component 100 to clamp the terminal 202 at the far end of the terminal 202.

[0030] Example 2, reference Figures 1 to 3 , which is the second embodiment of the present utility model. Different from the previous embodiment, a rotating frame 102 is provided on the top of the fixed grip 101, and a first elastic member 103 is provided at the bottom of the fixed grip 101. The end of the first elastic member 103 away from the fixed grip 101 is connected to the adjusting grip 104, and a connecting structure 105 is provided on the top of the adjusting grip 104. The adjusting grip 104 is connected to the lower clamping jaw 204 through the connecting structure 105. The adjusting grip 104 can rotate on the fixed grip 101. When the adjusting grip 104 moves toward the fixed grip 101, the adjusting grip 104 will drive the lower clamping jaw 204 away from the upper clamping jaw 203 to operate the lower clamping jaw 204. An arc-shaped connecting frame 106 is provided on the side of the fixed grip 101.

[0031] Furthermore, the connecting structure 105 includes a pry bar 105a provided on the top of the adjustment handle 104. A connecting plate 105b is provided on the top of the pry bar 105a. The connecting plate 105b is made of elastic material. A ring 105c is provided on the top of the connecting plate 105b.

[0032] Furthermore, a rotating rod 201 is provided on the inner wall of the rotating frame 102, the top of the rotating rod 201 passes through the rotating frame 102, and a hole is provided at the end of the rotating frame 102 for the rotating rod 201 to rotate. A terminal 202 is provided on the top of the rotating rod 201, and the terminal 202 on the top of the rotating rod 201 can be connected to an electric wire. A sliding rod 206 is provided on the outer wall of the rotating rod 201, and the side of the rotating rod 201 is connected to the upper clamping jaw 203, and the upper clamping jaw 203 is fixedly connected to the rotating rod 201.

[0033] Furthermore, the side of the lower jaw 204 is connected to the rotating rod 201, and the lower jaw 204 is sleeved on the outer wall of the rotating rod 201. A sliding groove cooperating with the sliding rod 206 is opened on the inner side of the lower jaw 204, and the lower jaw 204 can slide on the outer wall of the rotating rod 201. A guide ring 205 is provided on the side of the lower jaw 204, and the guide ring 205 is connected to the sleeve 105c. The sleeve 105c is sleeved on the outer wall of the guide ring 205, and the sleeve 105c can slide on the guide ring 205. A top ring 208 is provided at the bottom of the lower jaw 204, and a locking structure 207 is provided at the bottom of the rotating rod 201.

[0034] Furthermore, the locking structure 207 includes a lock seat 207a arranged at the bottom of the rotating rod 201, and a rotating shaft 207b is provided inside the lock seat 207a, and the rotating shaft 207b is rotatably connected to the lock seat 207a, and the top of the rotating shaft 207b is connected to the rotating rod 201, and a spline 207c is provided on the top of the rotating shaft 207b, and the spline 207c is fixedly connected to the rotating shaft 207b, and a snap ring 207d is provided on the outer wall of the spline 207c, and a groove with the same outer contour as the spline 207c is provided inside the snap ring 207d, and a slider 207e is provided on the side of the snap ring 207d, and a sliding groove matching the slider 207e is provided inside the lock seat 207a, and the snap ring 207d can slide on the lock seat 207a, and a second elastic member 207f is provided at the bottom of the snap ring 207d, and the bottom of the second elastic member 207f is connected to the lock seat 207a.

[0035] Usage process: When using the connecting mechanism to connect the terminal 202, you can first adjust the angle between the operating component 100 and the fixed component 200, hold the fixed grip 101, apply pressure to the adjustment grip 104, drive the adjustment grip 104 close to the fixed grip 101, and the fixed grip 101 will drive the lower clamping jaw 204 away from the upper clamping jaw 203 until the top ring 208 at the bottom of the lower clamping jaw 204 contacts the snap ring 207d, the lower clamping jaw 204 continues to slide, the top ring 208 will drive the snap ring 207d to slide toward the lock seat 207a, and the snap ring 207d will move away from the spline 207c. At this time, the rotating rod 201 can rotate, which can drive the upper and lower clamping jaws 203 and 204 to rotate. Adjust the angle between the clamping jaw and the fixed grip 101. After the adjustment is completed, loosen the adjusting grip 104. The first elastic member 103 will drive the adjusting grip 104 away from the fixed grip 101, and the lower clamping jaw 204 will move up. The top ring 208 will move away from the snap ring 207d. The snap ring 207d will rebound under the action of the second elastic member 207f and re-engage with the spline 207c. The rotating rod 201 is locked, and a fixed angle is maintained between the clamping jaw and the fixed grip 101. After adjusting the appropriate angle, place the clamping jaw at the connection of the terminal 202. Press the adjusting grip 104 to drive the lower clamping jaw 204 away from the upper clamping jaw 203. Then loosen the adjusting grip 104 to clamp the terminal 202 to complete the connection.

[0036] Example 3, reference Figures 1 to 4 This is the third embodiment of the present invention, which further provides an AGC, AVC, and primary frequency modulation control system. It includes a host unit 300, including an operator station 301, a first host 302, and a second host 303; a switching unit 400; and a lower unit 500, including a first PLC 501 and a second PLC 502. The host unit 300 consists of two redundant servers, with a single computer serving as the operator station 301.

[0037] The functions of the host are: a platform for AGC and AVC program operation, primary frequency regulation parameter setting, data calculation and storage, and communication processing; the function of the operator station 301 is: to provide power plant operators with a window for monitoring the operating status of the AGC, AVC, and primary frequency regulation systems, function activation and deactivation, and parameter modification.

[0038] Furthermore, the operator station 301 is connected to the switching unit 400 , the first host 302 is connected to the switching unit 400 , and the second host 303 is connected to the switching unit 400 .

[0039] Preferably, the first PLC501 includes a power supply 501a, a CPU501b, an AI501c and a DI501d, the AI501c includes a power transmitter 501c-1, a voltage transmitter 501c-2 and a frequency transmitter 501c-3, the second PLC502 has the same structure as the first PLC501, the first PLC501 is connected to the switching unit 400, the second PLC502 is connected to the switching unit 400, the switching unit 400 is a host and lower computer switch, the lower computer is composed of two sets of PLCs to form a redundant host, each set of PLCs is composed of a power supply module, a CPU module, an (AI) analog input module and a (DI) switch input module.

[0040] Usage: The PLC program implements primary frequency regulation and coordinated control of primary frequency regulation and AGC. Measured quantities are converted to 4-20mA analog signals and connected to the PLC's analog input module. The host computer provides a platform for running AGC and AVC programs, setting primary frequency regulation parameters, calculating and storing data, and processing communications. Operator Station 301 provides a window for power plant operators to monitor the operating status of the AGC, AVC, and primary frequency regulation systems, enable and disable functions, and modify parameters.

[0041] The AGC and AVC control programs are run in the host computer, and their control logic is shown in the host computer part of the control logic diagram;

[0042] The frequency modulation program is run once in the lower computer, and its control logic is shown in the lower computer part of the control logic diagram;

[0043] The control logic diagram reflects the coordinated control relationship between AGC and primary frequency modulation: when the primary frequency modulation and AGC are adjusted in the same direction, the adjustment amount is the primary frequency modulation superimposed on AGC; when the adjustment direction is reversed, the primary frequency modulation locks the AGC.

[0044] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0046] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A connecting mechanism, characterized in that: include, An operating assembly (100) includes a fixed handle (101) and an adjustment handle (104) disposed at the bottom of the fixed handle (101); and The fixing assembly (200) comprises an upper clamping jaw (203) arranged at the top of the fixing handle (101) and a lower clamping jaw (204) arranged at the bottom of the upper clamping jaw (203).

2. The connecting mechanism according to claim 1, wherein: A rotating frame (102) is provided on the top of the fixed grip (101), and a first elastic member (103) is provided on the bottom of the fixed grip (101). An end of the first elastic member (103) away from the fixed grip (101) is connected to the adjustment grip (104).

3. The connecting mechanism according to claim 2, wherein: The top of the adjustment handle (104) is provided with a connection structure (105), and the side of the fixed handle (101) is provided with an arc-shaped connecting frame (106).

4. The connecting mechanism according to claim 3, wherein: The connecting structure (105) comprises a pry bar (105a) arranged on the top of the adjustment handle (104); a connecting plate (105b) is arranged on the top of the pry bar (105a); the connecting plate (105b) is made of elastic material; and a collar (105c) is arranged on the top of the connecting plate (105b).

5. The connecting mechanism according to claim 4, wherein: A rotating rod (201) is provided on the inner wall of the rotating frame (102), the top of the rotating rod (201) passes through the rotating frame (102), a terminal (202) is provided on the top of the rotating rod (201), a sliding rod (206) is provided on the outer wall of the rotating rod (201), and the side surface of the rotating rod (201) is connected to the upper clamping claw (203).

6. The connecting mechanism according to claim 5, wherein: The side surface of the lower clamping jaw (204) is connected to the rotating rod (201), the side surface of the lower clamping jaw (204) is provided with a guide ring (205), the bottom of the lower clamping jaw (204) is provided with a top ring (208), and the bottom of the rotating rod (201) is provided with a locking structure (207).

7. The connecting mechanism according to claim 6, wherein: The locking structure (207) comprises a lock seat (207a) arranged at the bottom of the rotating rod (201); a rotating shaft (207b) is arranged inside the lock seat (207a); the top of the rotating shaft (207b) is connected to the rotating rod (201); a spline (207c) is arranged at the top of the rotating shaft (207b); a snap ring (207d) is arranged on the outer wall of the spline (207c); a slider (207e) is arranged on the side of the snap ring (207d); a second elastic member (207f) is arranged at the bottom of the snap ring (207d); and the bottom of the second elastic member (207f) is connected to the lock seat (207a).

8. An AGC, AVC, and primary frequency modulation control system, characterized by: comprising the connecting mechanism according to any one of claims 1 to 7; and The upper part (300) includes an operator station (301), a first host (302) and a second host (303); exchange unit (400); The lower part (500) includes a first PLC (501) and a second PLC (502).

9. The AGC, AVC, and primary frequency modulation control system according to claim 8, characterized in that: The operator station (301) is connected to the switching unit (400), the first host (302) is connected to the switching unit (400), and the second host (303) is connected to the switching unit (400).

10. The AGC, AVC, and primary frequency modulation control system according to claim 9, characterized in that: The first PLC (501) includes a power supply (501a), a CPU (501b), an AI (501c) and a DI (501d); the AI (501c) includes a power transmitter (501c-1), a voltage transmitter (501c-2) and a frequency transmitter (501c-3); the second PLC (502) has the same structure as the first PLC (501); the first PLC (501) is connected to the switching unit (400); and the second PLC (502) is connected to the switching unit (400).

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