Power plant integrated control system and electrical system

Abstract

The utility model provides a power plant integrated control system and an electrical system. The control system comprises a booster station network monitoring system provided with a booster station network monitoring upper computer, an electrical monitoring system provided with an electrical monitoring upper computer, a distributed control system provided with a distributed control upper computer, and a lower computer. And station level networks of the booster station network monitoring system, the electrical monitoring system and the distributed control system are multiplexed. The lower computer is connected with the booster station network monitoring upper computer, the electrical monitoring upper computer and the distributed control upper computer through a station control layer network. The booster station network monitoring upper computer, the electrical monitoring upper computer and the distributed control upper computer monitor the lower computer through the station level network. According to the invention, the upper computer monitors the data of the lower computer through the station level network, and the lower computer achieves the data fusion of the lower computer through the multiplexing of the station level network, thereby improving the data transmission efficiency.

Description

Technical Field

[0001] This application relates to the technical field of power system control, and more specifically, to an integrated control system and electrical system for power plants. Background Technology

[0002] In existing power plant control systems, NCS (Network Control System) monitors electrical equipment in the substation. ECMS (Electric Control System) monitors electrical equipment. DCS (Distributed Control System) monitors equipment related to thermal processes.

[0003] The inventors of this application have discovered the following technical problems. In existing power plant control systems, the NCS, ECMS, and DCS are often deployed independently and maintained separately. The construction of power plant control systems requires laying a large number of cables, resulting in high construction costs and a heavy workload for operation and maintenance. If the NCS, ECMS, and DCS need to monitor each other, repeated network deployment is required. The inventors of this application have also discovered that power plant control systems suffer from the problem of the upper-level computer repeatedly collecting data from the lower-level computer, and the existing data transmission links in power plant control systems are numerous, leading to low data transmission efficiency.

[0004] The content in the background section is merely technology known to the public and does not necessarily represent existing technology in this field. Utility Model Content

[0005] According to one aspect of this application, an integrated control system for power plants is provided to solve at least one of the aforementioned technical problems. The control system includes a booster station network monitoring system with a booster station network monitoring host computer, an electrical monitoring system with an electrical monitoring host computer, a distributed control system with a distributed control host computer, a station control layer network, and lower-level computers. The lower-level computers include a protocol conversion device, a protection and control device, an electrical protection device, an electrical redundancy controller, and a process redundancy controller. The lower-level computers are connected to the booster station network monitoring host computer, the electrical monitoring host computer, and the distributed control host computer through the station control layer network. The booster station network monitoring host computer and the electrical monitoring host computer acquire data information from the protection and control device, the electrical protection device, the electrical redundancy controller, and the process redundancy controller through the station control layer network to monitor these devices. The distributed control host computer acquires data information from the protection and control device and the electrical protection device through the station control layer network, the protocol conversion device, and the electrical redundancy controller to monitor these devices. The distributed control host computer obtains data information from the electrical redundancy controller and the process redundancy controller through the station control layer network in order to monitor the electrical redundancy controller and the process redundancy controller.

[0006] According to the example embodiment, the electrical protection devices include generator-transformer unit protection devices, high-voltage plant auxiliary power protection devices, and high-voltage motor protection devices. The protection and control devices include line protection and control devices, busbar protection and control devices, and transformer protection and control devices. The substation network monitoring host computer and the electrical monitoring host computer acquire data information from the line protection and control devices, busbar protection and control devices, transformer protection and control devices, generator-transformer unit protection devices, high-voltage plant auxiliary power protection devices, and high-voltage motor protection devices through the station control layer network. The distributed control host computer acquires data information from the line protection and control devices, busbar protection and control devices, transformer protection and control devices, generator-transformer unit protection devices, high-voltage plant auxiliary power protection devices, and high-voltage motor protection devices through the station control layer network, protocol conversion devices, and electrical redundancy controllers.

[0007] According to the example embodiment, the electrical redundancy controller is connected to the plant power supply via hardwiring and / or fieldbus to monitor the plant power supply data. The process redundancy controller is connected to the thermal process equipment via hardwiring and / or fieldbus to monitor the thermal process equipment data.

[0008] According to an example embodiment, the thermal process equipment includes a high-voltage motor, a low-voltage motor, actuators, and field instruments. The high-voltage motor is hardwired to a process redundancy controller. The low-voltage motor, actuators, and field instruments are hardwired and / or connected to the process redundancy controller via a fieldbus.

[0009] According to the example embodiment, the protocol conversion device is a 61850 protocol conversion device. The 61850 protocol conversion device connects the station control layer network and the electrical redundancy controller.

[0010] According to the example embodiment, the booster station network monitoring host computer includes a booster station network monitoring server host computer, a booster station network monitoring operator station host computer, and a booster station network monitoring engineer station host computer. The network architecture of the booster station network monitoring system is a server / client structure. The booster station network monitoring engineer station host computer and the booster station network monitoring operator station host computer obtain data information from the lower-level machines through the booster station network monitoring server host computer.

[0011] According to the example embodiment, the electrical monitoring host computer includes an electrical monitoring operator station host computer and an electrical monitoring engineer station host computer. The electrical monitoring operator station host computer and the electrical monitoring engineer station host computer obtain data information from the lower-level machines through the station control layer network.

[0012] According to the example embodiment, the distributed control host computer includes a distributed control operator station host computer, a distributed control engineer station host computer, and a distributed control history station host computer. The distributed control operator station host computer, the distributed control engineer station host computer, and the distributed control history station host computer obtain data information from the lower-level machines through the station control layer network.

[0013] According to an example embodiment, this application also provides an electrical system including the control system described above.

[0014] Beneficial effects

[0015] The integrated power plant control system of this application uses a host computer to collect data from slave computers via a station control layer network. The slave computers then multiplex data through this network, reducing data transmission steps and improving efficiency. Furthermore, the integrated power plant control system eliminates the need for separate network deployments for monitoring between its subsystems, thus reducing the engineering costs of constructing the control system. Finally, the subsystems of the integrated power plant control system do not require dedicated maintenance personnel, further reducing maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an integrated power plant control system according to an embodiment of this application is shown.

[0018] Explanation of reference numerals in the attached figures:

[0019] Substation network monitoring system 1; electrical monitoring system 2; distributed control system 3; substation network monitoring host computer 10; electrical monitoring host computer 20; distributed control host computer 30; protection and control device 40; electrical protection device 50; electrical redundancy controller 60; process redundancy controller 70; protocol conversion device 80.

[0020] Substation network monitoring server host computer 11; Substation network monitoring operator station host computer 12; Substation network monitoring engineer station host computer 13; Electrical monitoring operator station host computer 21; Electrical monitoring engineer station host computer 22; Distributed control operator station host computer 31; Distributed control engineer station host computer 32; Distributed control historical station host computer 33; Line protection and control device 41; Busbar protection and control device 42; Transformer protection and control device 43; Generator-transformer unit protection device 51; High-voltage plant power supply integrated protection device 52; High-voltage motor protection device 53; Plant power supply 61; Thermal process equipment 71. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0022] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0023] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0024] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.

[0025] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] According to the example embodiment, such as Figure 1 As shown, this application provides an integrated control system for a power plant. This control system may include a substation network monitoring system 1, an electrical monitoring system 2, and a distributed control system 3. The substation network monitoring system 1, the electrical monitoring system 2, and the distributed control system 3 share a station control layer network.

[0027] For example, the substation network monitoring system 1 is equipped with a substation network monitoring host computer 10, the electrical monitoring system 2 is equipped with an electrical monitoring host computer 20, and the distributed control system 3 is equipped with a distributed control host computer 30. The substation network monitoring host computer 10, the electrical monitoring host computer 20, and the distributed control host computer 30 can be connected to the substation control layer network respectively.

[0028] For example, the control system also includes a lower-level machine, which can be connected to the station control layer network and connected to the booster station network monitoring upper-level machine 10, the electrical monitoring upper-level machine 20 and the distributed control upper-level machine 30 through the station control layer network.

[0029] For example, the lower-level machine may include a protocol converter 80, a protection and control device 40, an electrical protection device 50, an electrical redundancy controller 60, and a process redundancy controller 70. For example, the protocol converter 80 may be a 61850 protocol converter. The 61850 protocol converter can be connected to the station control layer network and the electrical redundancy controller 60. The protection and control device 40 may include a line protection and control device 41, a busbar protection and control device 42, and a transformer protection and control device 43. The electrical protection device 50 may include a generator-transformer unit protection device 51, a high-voltage plant auxiliary power integrated protection device 52, and a high-voltage motor protection device 53. The process redundancy controller 70 may be a boiler / turbine redundancy controller.

[0030] For example, the line protection and control device 41 can monitor the lines of the substation to provide overcurrent and overload protection. The busbar protection and control device 42 can monitor the busbars of the substation to identify overload, short circuit, grounding, and other faults, and then disconnect the faulty busbar. The transformer protection and control device 43 can monitor the transformers of the substation to protect and control them.

[0031] For example, the generator-transformer unit protection device 51 is used to protect the electrical equipment of the generator-transformer unit. The generator-transformer unit protection device 51 can issue a warning signal when a fault occurs in the generator-transformer unit, thereby identifying the specific generator-transformer unit where the fault has occurred. The high-voltage plant auxiliary power integrated protection device 52 can detect voltage abnormalities and current differentials in the power equipment, thereby determining the fault in the power equipment. The high-voltage motor protection device 53 may include overload protection, short-circuit protection, undervoltage protection, over-temperature protection, and other protection functions to monitor and protect the high-voltage motor.

[0032] For example, the substation network monitoring system 1 can communicate with the lower-level machine based on the IEC 61850 protocol. The substation network monitoring upper-level machine 10 can directly obtain data information from the protection and control device 40 and the electrical protection device 50 via the station control layer network using the IEC 61850 protocol to monitor the protection and control device 40 and the electrical protection device 50. The substation network monitoring upper-level machine 10 can also obtain data information from the plant power supply 61 through the electrical redundancy controller 60 based on the IEC 61850 protocol to monitor the plant power supply 61. The substation network monitoring upper-level machine 10 can also obtain data information from the thermal process equipment 71 through the boiler / turbine controller based on the IEC 61850 protocol to monitor the thermal process equipment 71.

[0033] For example, the electrical monitoring system 2 communicates with the lower-level machine based on the IEC 61850 protocol. The electrical monitoring upper-level machine 20 can directly obtain data information from the protection and control device 40 and the electrical protection device 50 via the station control layer network according to the IEC 61850 protocol to monitor the protection and control device 40 and the electrical protection device 50. The electrical monitoring upper-level machine 20 can obtain data information from the plant power supply 61 through the electrical redundancy controller 60 according to the IEC 61850 protocol to monitor the plant power supply 61. The electrical monitoring upper-level machine 20 can also obtain data information from the thermal process equipment 71 through the boiler / turbine controller according to the IEC 61850 protocol to monitor the thermal process equipment 71.

[0034] For example, the distributed control system 3 communicates with the electrical redundancy controller 60 and the process redundancy controller 70 based on the DCS internal protocol. The distributed control host computer 30 can obtain data information from the protection and control device 40 and the electrical protection device 50 through the station control layer network, the electrical redundancy controller 60, and the protocol conversion device 80 to monitor the protection and control device 40 and the electrical protection device 50. The distributed control host computer 30 can also obtain data information from the electrical redundancy controller 60 and the process redundancy controller 70 through the station control layer network based on the DCS internal protocol to monitor the electrical redundancy controller 60 and the process redundancy controller 70.

[0035] For example, the plant power supply 61 may include a low-voltage plant power supply and a high-voltage plant power supply. The low-voltage and high-voltage plant power supplies may be connected to the electrical redundancy controller 60 via fieldbus and / or hardwiring based on the Profibus-DP (Decentralized Peripheral) protocol. The thermal process equipment 71 may include a high-voltage motor, a low-voltage motor, actuators, and field instruments. The high-voltage motor may be hardwired to the process redundancy controller 70, and the low-voltage motor, actuators, and field instruments may be hardwired and / or connected to the process redundancy controller 70.

[0036] For example, the network architecture of the booster station network monitoring system 1 can be a server / client structure. The booster station network monitoring host computer 10 may include a booster station network monitoring server host computer 11, a booster station network monitoring operator station host computer 12, and a booster station network monitoring engineer station host computer 13. The booster station network monitoring engineer station host computer 13 and the booster station network monitoring operator station host computer 12 can monitor the slave computers through the booster station network monitoring server host computer 11.

[0037] The electrical monitoring host computer 20 may include an electrical monitoring operator station host computer 21 and an electrical monitoring engineer station host computer 22. The distributed control host computer 30 may include a distributed control operator station host computer 31, a distributed control engineer station host computer 32, and a distributed control historical station host computer 33.

[0038] According to the above embodiments, the host computer of the integrated power plant control system of this application collects data from the slave computers through the station control layer network, and achieves data fusion of the slave computers through the station control layer network multiplexing, reducing data transmission links and thus improving data transmission efficiency. The mutual monitoring of various subsystems of the integrated power plant control system does not require separate network deployment, thereby reducing the engineering cost of constructing the power plant control system. Furthermore, the subsystems of the integrated power plant control system do not require independent maintenance personnel, thus reducing maintenance costs.

[0039] By way of example, this application also provides an electrical system including the control system described above.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An integrated control system for power plants, characterized in that, include: The substation network monitoring system is equipped with a host computer for substation network monitoring. The electrical monitoring system is equipped with an electrical monitoring host computer. The distributed control system is equipped with a distributed control host computer. The station control layer network is multiplexed from the booster station network monitoring system, the electrical monitoring system, and the distributed control system. The lower-level machine is connected to the booster station network monitoring upper-level machine, the electrical monitoring upper-level machine, and the distributed control upper-level machine through the station control layer network. The lower-level machine includes a protocol conversion device, a protection and control device, an electrical protection device, an electrical redundancy controller, and a process redundancy controller. The substation network monitoring host computer and the electrical monitoring host computer acquire data information of the protection and control device, the electrical protection device, the electrical redundancy controller and the process redundancy controller through the station control layer network, so as to monitor the protection and control device, the electrical protection device, the electrical redundancy controller and the process redundancy controller; The distributed control host computer obtains data information of the protection and control device and the electrical protection device through the station control layer network, the protocol conversion device and the electrical redundancy controller to monitor the protection and control device and the electrical protection device. The distributed control host computer obtains data information of the electrical redundancy controller and the process redundancy controller through the station control layer network to monitor the electrical redundancy controller and the process redundancy controller.

2. The control system according to claim 1, characterized in that: The electrical protection devices include generator-transformer unit protection devices, high-voltage plant power supply integrated protection devices, and high-voltage motor protection devices; The protection and control device includes a line protection and control device, a busbar protection and control device, and a transformer protection and control device. The substation network monitoring host computer and the electrical monitoring host computer acquire data information from the line protection and control device, the bus protection and control device, the transformer protection and control device, the generator-transformer group protection device, the high-voltage plant power supply integrated protection device, and the high-voltage motor protection device through the station control layer network. The distributed control host computer acquires data information from the line protection and control device, the bus protection and control device, the transformer protection and control device, the generator-transformer group protection device, the high-voltage plant power supply integrated protection device, and the high-voltage motor protection device through the station control layer network, the protocol conversion device, and the electrical redundancy controller.

3. The control system according to claim 1, characterized in that: The electrical redundancy controller is connected to the plant power supply via hardwiring and / or fieldbus to obtain the plant power supply's data information; The process redundancy controller is connected to the thermal process equipment via hardwiring and / or fieldbus to obtain data information from the thermal process equipment.

4. The control system according to claim 3, characterized in that: The thermal process equipment includes a high-voltage motor, a low-voltage motor, actuators, and field instruments; The high-voltage motor is connected to the process redundancy controller via hardwiring, and the low-voltage motor, the actuator, and the field instruments are connected to the process redundancy controller via hardwiring and / or fieldbus.

5. The control system according to claim 1, characterized in that: The protocol conversion device is a 61850 protocol conversion device, which is connected to the station control layer network and the electrical redundancy controller.

6. The control system according to claim 1, characterized in that: The booster station network monitoring host computer includes a booster station network monitoring server host computer, a booster station network monitoring operator station host computer, and a booster station network monitoring engineer station host computer; The network architecture of the booster station network monitoring system is a server / client structure. The booster station network monitoring engineer station host computer and the booster station network monitoring operator station host computer obtain data information from the slave computer through the booster station network monitoring server host computer.

7. The control system according to claim 1, characterized in that: The electrical monitoring host computer includes an electrical monitoring operator station host computer and an electrical monitoring engineer station host computer. The electrical monitoring operator station host computer and the electrical monitoring engineer station host computer obtain data information from the lower-level computer through the station control layer network.

8. The control system according to claim 1, characterized in that: The distributed control host computer includes a distributed control operator station host computer, a distributed control engineer station host computer, and a distributed control history station host computer. The distributed control operator station host computer, the distributed control engineer station host computer, and the distributed control history station host computer obtain data information from the lower-level machines through the station control layer network.

9. An electrical system, characterized in that, Includes the control system described in any one of claims 1-8.

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