Full-autonomous controllable dual-redundancy control system for measuring and controlling rotating speed of unit

Abstract

The utility model relates to the field of automatic control equipment of a hydroelectric generating set, in particular to a full-autonomous controllable dual-redundancy control system for measuring and controlling the rotating speed of the generating set, which comprises a first controller and a second controller connected with the first controller, the input module is connected with eight paths of frequency measurement signal sources, divides the eight paths of frequency measurement signal sources into two groups, and transmits the two groups of frequency measurement signal sources to the frequency processing module of the first controller and the frequency processing module of the second controller respectively; the output module is respectively connected with the second controller connected with the first controller and is used for receiving the output signal; and the first controller communicates with the second controller through a switch. The beneficial effects of the utility model are that by adopting the full-automatic double-power-supply and double-controller redundancy rotating speed measurement and control device, the accuracy, the stability, the reliability and the safety of an important signal of the rotating speed of a power station unit are improved.

Description

Technical Field

[0001] The utility model relates to the field of automatic control equipment for hydropower units, in particular to a fully autonomous controllable dual-redundancy control system for measuring and controlling the rotational speed of the unit. Background Art

[0002] Currently, power plants generally use imported single-controller speed measurement and control devices with a single input and output signal. The speed signal is crucial in hydro-turbine systems. Traditional imported speed measurement devices use a single controller with a single input signal, and the control output lacks decisiveness.

[0003] However, if the unit speed measurement and control device fails or reports a false alarm, it will affect important processes such as the unit's normal start-up and shutdown process control, emergency shutdown process execution, and unit status judgment. More seriously, it will cause the unit to shut down unexpectedly. Utility Model Content

[0004] 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.

[0005] In view of the above-mentioned problem or the problem of unstable control of existing control systems in the prior art, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a fully autonomous controllable dual redundant control system for unit speed measurement and control.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a fully autonomous controllable dual-redundant control system for unit speed measurement and control, comprising: a control module, including a first controller and a second controller connected to the first controller; and an input module, wherein the input module is connected to an 8-channel frequency measurement signal source and divides the 8-channel frequency measurement signal source into two groups and transmits them to the first controller and the second controller respectively; an output module, wherein the output module is connected to the second controller connected to the first controller respectively and receives the output signal; the first controller and the second controller communicate with each other through a switch.

[0008] As a preferred solution of the fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, the 8-way frequency measurement signal sources are respectively 4-way unit mutual inductor signals and 4-way gear disc speed measurement pulse signals.

[0009] As a preferred solution of the fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, the switch is also connected to a touch screen, and the switch and the touch screen communicate with external devices through a serial port and Ethernet.

[0010] As an optimal solution for a fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, it also includes a power supply module, which includes a first power supply redundancy module and a second power supply redundancy module. The power supply modules are respectively connected to two power supply lines, and the power supply lines are connected to an incoming line switch and a power supply fuse.

[0011] As a preferred solution of the fully autonomous controllable dual redundant control system for unit speed measurement and control of the utility model, wherein: the first power redundancy module is connected to the switch and the touch screen; the first power redundancy module is also connected to the fault indicator light HL111 and the relay KR111.

[0012] As a preferred solution of the fully autonomous controllable dual redundant control system for unit speed measurement and control of the utility model, the second power redundancy module is connected to the first controller and the second controller; the second power redundancy module is also connected to the fault indicator light HL121 and the relay KR121.

[0013] As a preferred solution of the fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, wherein: after the power supply module is connected to the power supply through the power supply line, it exports a DC24V power supply with redundant properties.

[0014] As a preferred solution of the fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, the first controller is also connected to a main indicator light HL13, a fault indicator light HL14, a relay KR13, and a relay KR14.

[0015] As a preferred solution of the fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, the second controller is also connected to a main indicator light HL15, a fault indicator light HL16, a relay KR15, and a relay KR16.

[0016] As a preferred solution of the fully autonomous controllable dual-redundant control system for unit speed measurement and control of the utility model, the first controller and the second controller are connected to the fault indicator light and relay of the output module through the signal isolation module.

[0017] The beneficial effects of the present invention are as follows: the present invention improves the accuracy, stability, reliability and safety of the important signal of the speed of the power station unit by adopting a fully autonomous dual-power supply and dual-controller redundant speed measurement and control device; and effectively prevents the risk of abnormal operation or "unstoppable" of the unit due to failure of the speed measurement and control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0019] Figure 1 It is a schematic structural diagram of the utility model as a whole.

[0020] Figure 2 This is the control principle diagram of the utility model.

[0021] Figure 3 It is a top view of the device of the present utility model.

[0022] Figure 4 for Figure 3 Front view of .

[0023] Figure 5 for Figure 3 side view. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Example 1

[0028] Reference Figure 1, which is the first embodiment of the present utility model, provides a fully autonomous controllable dual-redundant control system for unit speed measurement and control, which can achieve a stable control effect. It includes a control module 100, an input module 200, and an output module 300. The control module 100 is set to analyze and process the information of the input module 200, and then the control system 100 transmits the processed information to the output module 300.

[0029] Specifically, the control module 100 includes a first controller 101 and a second controller 102 connected to the first controller 101 ; the control module 100 is provided with two, the first controller 101 and the second controller 102 , which respectively receive information transmitted by the input module 100 .

[0030] Furthermore, the input module 200 is connected to 8 frequency measurement signal sources, and the 8 frequency measurement signal sources are divided into two groups and transmitted to the frequency processing modules of the first controller 101 and the second controller 102 respectively; the frequency processing modules of the first controller 101 and the second controller 102 respectively receive four frequency measurement signal sources, process and analyze the signal sources, and analyze the speed signal sources.

[0031] Furthermore, the output module 300 is connected to the second controller 102 connected to the first controller 101 to receive the output signal. The first controller 101 and the second controller 102 communicate with each other via the switch 400. The first controller 101 and the second controller 102 process and analyze the information and then output a reliable and safe speed signal to the output module 300.

[0032] Operation process: The 8-channel frequency measurement signal sources are divided into two groups and enter the frequency processing modules of the first controller 101 and the second controller 102 respectively for processing and analysis. The second control module 102 and the first controller 101 share data and operating status with each other through the switch 400. The first controller 101 serves as the main controller and transmits the speed signal source to the output module 300. If the input speed signal source fails or is distorted, the first controller 101 automatically switches to the normally operating second controller 102 as the main controller for speed output, protects the normal operation of the unit, and sends an alarm signal.

[0033] In summary, the control module 100 is provided to improve the accuracy, stability, reliability and safety of the important signal of the power station unit speed; and effectively prevent the unit from operating abnormally due to a failure of the speed measurement and control device.

[0034] Example 2

[0035] Reference Figures 1-2This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment further optimizes a fully autonomous, controllable, dual-redundant control system for unit speed measurement and control, solving the problem of reliable control. It includes eight frequency measurement signal sources, four unit transformer signals and four geared disc speed measurement pulse signals. The two unit transformer signals and the two geared disc speed measurement pulse signals are grouped together, and the two signal groups are transmitted to the first controller 101 and the second controller 102, respectively. The frequency processing modules of the first controller 101 and the second controller 102 process and analyze the received signals and then transmit the processed and analyzed signals to the output module 300. The eight channels utilize different filtering and limiting algorithms, interference removal algorithms, and anti-mutation algorithms to achieve real-time monitoring of the turbine generator unit speed with high reliability and accuracy.

[0036] Furthermore, the switch 400 is also connected to a touch screen 500. The switch 400 and touch screen 500 communicate with external devices via serial ports and Ethernet. The first controller 101, the second controller 102, and the touch screen 500 are connected via the switch 400 and industrial Ethernet for data exchange, analysis, and processing. The touch screen 500 and the switch 400 perform external MODBUS RTU and MODBUS TCP communications via serial ports and Ethernet. The switch allows the first controller 101 and the second controller 102 to share data and operating status with each other; it can also simultaneously communicate with external devices and transmit important data information. The touch screen 500 records and stores operating data and events of the speed measurement and control device, and through analysis, issues warnings for potential faults, including electrical hardware alarm monitoring, mechanical alarm monitoring, and various operating condition monitoring. The touch screen 500 also comprehensively and completely stores system operating process information and equipment status information over a long period of time, enabling fault recording, historical backtracking, data processing, operating condition analysis recording, and status analysis.

[0037] Furthermore, the system also includes a power supply module 600, which includes a first redundant power supply module 601 and a second redundant power supply module 602. Each power supply module 600 is connected to two power supply lines 603, each of which is connected to a line switch and a power fuse. The two power supply circuits can provide hot backup for each other, ensuring seamless switching. The two power supplies enter the first redundant power supply module 601 and the second redundant power supply module 602, respectively, to create a redundant 24V DC power supply. This 24V DC power supply then powers all internal components via a power bus.

[0038] Preferably, the first power redundancy module 601 is connected to the switch 400 and the touch screen 500; the first power redundancy module 601 is also connected to a fault indicator light HL111 and a relay KR111. The first power redundancy module 601 is used to provide power to the switch 400 and the touch screen 500. The first power redundancy module 601 is also connected to the fault indicator light HL111 and the relay KR111. When the power supply connected to the first power redundancy module 601 fails, the power fault indicator light HL111 turns off, the relay KR111 resets, and a power fault signal is output.

[0039] Preferably, the second power redundancy module 602 is connected to the first controller 101 and the second controller 102; the second power redundancy module 602 is also connected to a fault indicator light HL121 and a relay KR121. The second power redundancy module 602 is used to supply power to the first controller 101 and the second controller 102. The second power redundancy module 602 is also connected to the fault indicator light HL121 and the relay KR121. When the power supply connected to the second power redundancy module 602 fails, the power fault indicator light HL121 turns off, the relay KR121 resets, and a power fault signal is output.

[0040] Furthermore, after receiving a power source via the power input cable, power module 600 generates a redundant 24V DC power supply. If the power supply connected to the first power redundancy module 601 fails, the second power redundancy module 602 can provide power for the entire device. Conversely, the first power redundancy module 601 can also provide power for the entire device.

[0041] Operation process: When in use, the 8-channel frequency measurement signal sources are divided into two groups and transmitted to the frequency processing modules of the first controller 101 and the second controller 102 respectively through the input module 200. The transmitted information is processed and analyzed, and the processed and analyzed data is shared through the switch 400. The first controller 101 then transmits the processed information to the output module 300, outputs the switching signal at each speed point of the unit, and displays the corresponding storage status, data and fault information on the touch screen 500.

[0042] In summary, by setting up the first controller 101, the second controller 102 and the switch 400, a fully autonomous and controllable dual-controller redundant control circuit can be provided, thereby improving the accuracy, stability, reliability and safety of the important signal of the power station unit speed; at the same time, the dual redundant power supplies can serve as hot standby for each other, and switching can be disturbance-free.

[0043] Example 3

[0044] Reference Figures 1-2This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a fully autonomous, controllable, dual-redundant control system for unit speed measurement and control, resolving the issue of fault indication. The control system includes a first controller 101 connected to a primary indicator light HL13, a fault indicator light HL14, and relays KR13 and KR14. When the first controller 101 fails, the primary indicator light HL13 turns off, the fault indicator light HL14 turns on, relay KR13 turns off, and relay KR14 turns on. At this point, the second controller 102 outputs information to the output module 300. Conversely, the primary indicator light HL13 turns on, the fault indicator light HL14 turns off, relay KR13 turns on, and relay KR14 turns off. The first controller 101 then functions as the primary controller, outputting information.

[0045] Furthermore, the second controller 102 is also connected to a master indicator light HL15, a fault indicator light HL16, a relay KR15, and a relay KR16. When the first controller 102 is in master mode, the master indicator light HL15 and the fault indicator light HL16 are both off, and the relays KR15 and KR16 are both closed. When the first controller 101 fails, the second controller 102 acts as the master controller, outputting information, the master indicator light HL15 turns on, the fault indicator light HL16 turns off, and the relays KR15 and KR16 turn off.

[0046] Furthermore, the first controller 101 and the second controller 102 are connected to the fault indicator light and relay of the output module through the signal isolation module. The signal isolation module outputs the switch signal at each speed point of the unit through the output relay J1-J12, and the analog signal corresponding to the unit speed is output through the analog output module. The fault indicator light is used to show whether the output module has a fault, and the relay is used to output the fault signal. When it is turned on, the fault signal is output, and when it is turned off, it means that it is normal and there is no fault. Figure 1 There are 12 fault indicator lights and relays to display the status of units J1~J12.

[0047] In summary, fault signal lights and relays are set to indicate whether a fault occurs in the device.

[0048] 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 without substantially departing from the novel teachings and advantages of the subject matter described in this application (e.g., variations in mounting arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of an element may be inverted or otherwise changed, and the nature, number, or position of 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 structures that perform the functions described herein, and not only structural equivalence but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0049] Example 4

[0050] Reference Figures 1 to 5 This project primarily consists of a PLC controller, touch screen, relays, indicator lights, and accessories. All components are now made from independently controlled, domestically produced equipment, achieving a 100% localization rate. The PLC controller's CPU module uses GigaDevice, the CPS power module chip is from Monsun, the memory card FLASH is from GigaDevice, the digital signal module AD module uses Core Interconnect, and the analog signal module DA module uses SiRuiPu. Specific models are as follows:

[0051]

[0052]

[0053] Example 5

[0054] Reference Figures 3-5 The device is a rectangular parallelepiped, housed in a housing 700. A touch screen is located on the left side of the front of the device, while indicators for power, fault, and primary / standby signals are located on the right side. Specifically, indicators include Power 1 Normal, Power 2 Normal, Unit A Primary, Unit B Primary, Unit A Fault, and Unit B Fault. Also located on the right side are the power switch button and fuse for Power 1, and the power switch button and fuse for Power 2. The power switch button is protected by a protective cover to prevent accidental contact. The fuse is a knob-type device, making it easy to replace and maintain in the event of a fault.

[0055] The panels on both sides of the device are fixed with bolts to facilitate the installation and fixation of the equipment. The sides and top of the device adopt grille holes to dissipate heat and ventilation to ensure the normal heat dissipation of the components inside the box.

[0056] Additionally, in an effort to provide a concise description of example embodiments, all features of an actual implementation may not be described.

[0057] It should be understood 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 for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0058] 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 fully autonomous and controllable dual-redundant control system for unit speed measurement and control, characterized by: include, A control module (100) includes a first controller (101), a second controller (102) connected to the first controller (101); and An input module (200) is connected to 8-channel frequency measurement signal sources, and divides the 8-channel frequency measurement signal sources into two groups and transmits them to the frequency processing modules of the first controller (101) and the second controller (102) respectively; An output module (300), the output module (300) being connected to the second controller (102) connected to the first controller (101) and receiving an output signal; The first controller (101) and the second controller (102) communicate with each other via a switch (400).

2. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 1, characterized in that: The 8 frequency measurement signal sources are respectively 4 sets of mutual inductor signals and 4 gear disc speed measurement pulse signals.

3. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 1 is characterized in that: The switch (400) is also connected to a touch screen (500), and the switch (400) and the touch screen (500) communicate with external devices via a serial port and Ethernet.

4. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 1 is characterized in that: The system further comprises a power supply module (600), wherein the power supply module (600) comprises a first power supply redundancy module (601) and a second power supply redundancy module (602). The power supply module (600) is respectively connected to two power supply lines (603), and the power supply lines (603) are connected to a line switch and a power supply fuse.

5. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 4 is characterized in that: The first power redundancy module (601) is connected to the switch (400) and the touch screen (500); the first power redundancy module (601) is also connected to a fault indicator light HL111 and a relay KR111.

6. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 5, characterized in that: The second power redundancy module (602) is connected to the first controller (101) and the second controller (102); the second power redundancy module (602) is also connected to a fault indicator light HL121 and a relay KR121.

7. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 6, characterized in that: After the power supply module (600) is connected to the power supply through the power supply line, it exports a DC24V power supply with redundant properties.

8. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 7, characterized in that: The first controller (101) is also connected to a main indicator light HL13, a fault indicator light HL14, a relay KR13, and a relay KR14.

9. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 8, characterized in that: The second controller (102) is also connected to a main indicator light HL15, a fault indicator light HL16, a relay KR15, and a relay KR16.

10. The fully autonomous controllable dual-redundant control system for unit speed measurement and control according to claim 9, characterized in that: The first controller (101) and the second controller (102) are connected to the fault indicator light and the relay of the output module via the signal isolation module.

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