Intelligent power management system for thermal control system of thermal power plant

Abstract

The invention discloses an intelligent power management system for a thermal control system of a thermal power plant. The system comprises a dual-power-supply switching device, an external power supply supplies power through the dual-power-supply switching device and is distributed to a plurality of branch circuits through a power supply distribution bus device, and each branch circuit comprises at least one intelligent air switch; the intelligent air switch comprises a switch monitoring module and a switch processing module, the switch monitoring module is used for monitoring the on-off state of the intelligent air switch in real time, and the switch processing module is used for recognizing fault information in real time according to the on-off state. According to the technical scheme provided by the invention, the switch monitoring module and the switch processing module are arranged in the air switch, so that the real-time monitoring and fault identification of each branch circuit are realized, the fault position can be quickly positioned when the power is cut off and transmitted, the time for finding the fault position is reduced, and the reliability and the maintenance efficiency of the system are remarkably improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of thermal control systems for thermal power plants, and in particular to an intelligent power management system for thermal control systems for thermal power plants. Background Art

[0002] The thermal control system of a thermal power plant is the core control system that ensures the safe, stable and efficient operation of the power plant. It is a key link in the thermal power generation process. The reliability and intelligence level of its power management system directly affect the normal operation of the thermal control system. The traditional power management architecture generally uses a primary circuit breaker, which is distributed to the next level through a dual power switching device through a busbar. The next level usually uses an air switch. Due to the large number of air switches, it is very difficult to find the fault location every time the power is cut off, which leads to a significant increase in the workload of maintenance personnel, seriously affecting the reliability and maintenance efficiency of the system.

[0003] Some thermal power plants have made partial optimizations in power management, such as replacing power switching devices and reducing the number of switching devices, specifically integrating five sets of power switching devices into three sets, or using static switch switching devices and DC power switching devices. However, these solutions still rely on traditional air switches for power distribution and still cannot achieve rapid fault location. Summary of the invention

[0004] The embodiment of the present invention provides an intelligent power management system for a thermal control system of a thermal power plant, so as to realize rapid positioning of a fault position, reduce the time for finding the fault position, and thus improve the reliability and maintenance efficiency of the system.

[0005] The embodiment of the present invention provides an intelligent power management system for a thermal control system of a thermal power plant, the system comprising a dual power switching device, an external power supply is supplied by the dual power switching device, and is distributed to a plurality of branch circuits through a power distribution bus device, each of the branch circuits comprising at least one intelligent air switch;

[0006] The intelligent air switch includes a switch monitoring module and a switch processing module. The switch monitoring module is used to monitor the switch state of the intelligent air switch in real time, and the switch processing module is used to identify fault information in real time according to the switch state.

[0007] Optionally, the system also includes a centralized monitoring and management subsystem; the intelligent air switch also includes a switch communication module, which is used to upload the switch status and / or the fault information to the centralized monitoring and management subsystem in real time; the centralized monitoring and management subsystem is used to determine the fault branch in real time according to the switch status and / or the fault information.

[0008] Optionally, the centralized monitoring and management subsystem is also used to restore power supply to non-fault branches through the switch communication module when an over-trip occurs.

[0009] Optionally, the dual power switching device includes a dual power switching controller and a contactor, and the dual power switching controller is used to monitor the power status of the external power supply in real time, and switch between the main power supply and the backup power supply through the contactor according to the power status.

[0010] Optionally, the dual power switching device further includes a switching device communication module, which is used to upload the power status and / or switching status to the centralized monitoring and management subsystem in real time.

[0011] Optionally, the dual power switching device further includes an arc extinguishing circuit for reducing damage to the contactor contacts caused by the electric arc during the switching process.

[0012] Optionally, the power distribution bus device includes a bus, on which sensors and a bus communication module are provided, the sensor is used to monitor the line status of the bus in real time, and the bus communication module is used to upload the line status to the centralized monitoring and management subsystem in real time.

[0013] Optionally, the power distribution bus device includes a branch connector for connecting the bus to each of the branch circuits; the branch connector is provided with a connector communication module for uploading the connection status to the centralized monitoring and management subsystem in real time.

[0014] Optionally, the centralized monitoring and management subsystem is also used to predict potential system failures based on historical and real-time system data using a machine learning algorithm; the system data includes at least one of the switch status, the fault information, the power status uploaded by the dual power switching device, the switching status uploaded by the dual power switching device, the line status uploaded by the power distribution bus device, and the connection status uploaded by the power distribution bus device.

[0015] Optionally, the centralized monitoring and management subsystem is also used to remotely control the opening and closing of each of the intelligent air switches based on user instructions.

[0016] The embodiment of the present invention provides an intelligent power management system for a thermal control system of a thermal power plant, the system includes a dual power switching device, an external power supply is supplied by the dual power switching device, and is distributed to a plurality of branch circuits through a power distribution bus device, each branch circuit includes at least one intelligent air switch. Each intelligent air switch includes a switch monitoring module and a switch processing module, the switch monitoring module is used to monitor the switch state of the corresponding intelligent air switch in real time, and the switch processing module is used to identify fault information in real time according to the corresponding switch state. By setting the switch monitoring module and the switch processing module in the air switch, real-time monitoring and fault identification of each branch circuit are realized, so that the fault location can be quickly located when the power is cut off, reducing the time for finding the fault location, and significantly improving the reliability and maintenance efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an intelligent power management system for a thermal control system of a thermal power plant provided in the first embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0019] Embodiment 1

[0020] Figure 1 This is a schematic diagram of the structure of the intelligent power management system for thermal control systems of thermal power plants provided in the first embodiment of the present invention. This embodiment is applicable to the power management of thermal control systems of thermal power plants, especially the management of the common AC380V and AC220V power levels. Figure 1 As shown, the system includes a dual power switching device 100, an external power supply 400 is powered by the dual power switching device 100, and is distributed to multiple branch circuits through a power distribution bus device 200, each of which includes at least one intelligent air switch 300; the intelligent air switch 300 includes a switch monitoring module 310 and a switch processing module 320, the switch monitoring module 310 is used to monitor the switch status of the intelligent air switch 300 in real time, and the switch processing module 320 is used to identify fault information in real time according to the switch status.

[0021] Specifically, the intelligent air switch 300 can be connected in series in the branch circuit. When a branch circuit fails (such as short circuit, overload, etc.), the intelligent air switch 300 can immediately cut off the power supply to protect the components in the circuit. At the same time, the intelligent air switch 300 can monitor the switch state in real time through the switch monitoring module 310 therein, so as to timely discover abnormal conditions, which may specifically include current, voltage, temperature, and opening and closing states, etc. Moreover, each intelligent air switch 300 has a fault self-diagnosis function. When a fault occurs, the switch processing module 320 therein can be used to identify the fault information in real time according to the monitored switch state. Specifically, it can be realized by a built-in fault diagnosis algorithm based on machine learning, so that the fault position can be quickly located according to the diagnosis results of each intelligent air switch 300 (such as the intelligent air switch 300 can alarm when a fault is detected), reducing the time for finding the fault switch, which is at least 70% shorter than the traditional solution, and then the staff can quickly respond to the fault and reduce downtime. Among them, the intelligent air switch 300 can use a high-performance ARM processor to be responsible for real-time monitoring and control, the rated current range can be 10A-100A, the operating voltage range can be AC380V±10%, AC220V±10%, and the fault diagnosis time is less than 1s.

[0022] On the basis of the above technical solution, optionally, the system also includes a centralized monitoring and management subsystem; the intelligent air switch 300 also includes a switch communication module, and the switch communication module is used to upload the switch status and / or the fault information to the centralized monitoring and management subsystem in real time; the centralized monitoring and management subsystem is used to determine the fault branch in real time according to the switch status and / or the fault information.

[0023] Specifically, each intelligent air switch 300 in the system can also be equipped with a switch communication module that supports communication protocols such as Modbus and Profibus. The centralized monitoring and management subsystem can be connected to all intelligent air switches 300 through the industrial network and each switch communication module, so that the switch status and / or fault information fed back in real time by each intelligent air switch 300 can be received, so as to facilitate centralized remote monitoring by the staff. Furthermore, the centralized monitoring and management subsystem can determine the fault branch in real time based on the received switch status and / or fault information, and can send an alarm signal to prompt the staff to handle it. The traditional solution takes an average of 10 minutes to find the faulty switch. The centralized monitoring and management subsystem and the intelligent air switch can shorten the fault location time to less than 1 second.

[0024] The centralized monitoring and management subsystem may include a monitoring host, which may specifically adopt a high-performance industrial computer and run a dedicated monitoring software to realize centralized monitoring of the intelligent power management system. The monitoring host may support Windows / Linux operating systems, and may provide an intuitive graphical human-computer interaction interface to display system topology diagrams, real-time system data, alarm signals, etc., wherein the human-computer interaction interface may also support touch screen operation, thereby facilitating operation and maintenance by staff. Further optionally, the centralized monitoring and management subsystem is also used to remotely control the opening and closing of each of the intelligent air switches 300 based on user instructions. The staff can then perform maintenance operations by remotely controlling the opening and closing of the switches, thereby improving the convenience and safety of the operation, while reducing the need for manual intervention and improving operational efficiency.

[0025] Further optionally, the centralized monitoring and management subsystem is also used to restore the power supply of the non-fault branch through the switch communication module when a skipping trip occurs. Specifically, in the traditional solution, when a branch circuit fails, it is easy to cause the upper air switch to trip, affecting the operation of the entire system, thereby seriously affecting the reliability and stability of the system. Then, when a skipping trip occurs, the monitoring host of the centralized monitoring and management subsystem can automatically and quickly restore the power supply of the non-fault branch based on the determined fault branch through the communication function of the intelligent air switch 300, thereby solving the impact of the skipping trip on the system and improving the system reliability. In addition, through the real-time monitoring and fault diagnosis functions of the intelligent air switch 300 itself, the occurrence of skipping trip events can also be effectively reduced.

[0026] Based on the above technical solution, optionally, the dual power switching device 100 includes a dual power switching controller and a contactor, and the dual power switching controller is used to monitor the power status of the external power supply in real time, and switch between the main power supply and the backup power supply through the contactor according to the power status.

[0027] Specifically, in the initial state, the main power supply can be powered by the dual power switching device 100. At the same time, the dual power switching device 100 can monitor the power status of the connected external power supply (i.e., the main power supply at this time) in real time through the dual power switching controller therein, which can specifically include voltage, frequency, phase, etc., and can judge whether the main power supply fails in real time according to the current power status to ensure the reliability of the switching. When it is determined that the main power supply fails, the contactor can be automatically controlled to switch to the backup power supply to ensure uninterrupted power supply of the system. Similarly, when it is detected that the backup power supply currently powered fails, or the main power supply is restored, the contactor can be switched back to the main power supply for power supply. Among them, the dual power switching device 100 can use a high-performance ARM processor to be responsible for real-time monitoring and control, the operating voltage range can be AC380V±10%, AC220V±10%, the switching time can be controlled to be less than 10ms, and the switching success rate can reach 99.99%. By optimizing the power distribution and fault handling process, downtime and maintenance costs are reduced, the overall performance of the system is improved, the system energy consumption is reduced, and the impact of downtime maintenance on the environment is indirectly reduced.

[0028] Further optionally, the dual power switching device 100 also includes a switching device communication module, which is used to upload the power status and / or switching status to the centralized monitoring and management subsystem in real time. Specifically, the dual power switching device 100 can also be equipped with a switching device communication module, which can support communication protocols such as Modbus and Profibus. The centralized monitoring and management subsystem can be connected to the dual power switching device 100 through the industrial network and the switching device communication module, so that the power status and / or switching status (such as the current switch to the main power supply / backup power supply) fed back by the dual power switching device 100 in real time can be received, so as to facilitate centralized remote monitoring by staff.

[0029] Further optionally, the dual power switching device 100 also includes an arc extinguishing circuit for reducing arc damage to the contactor contacts during the switching process, thereby extending the life of the contactor and ensuring the reliability of power switching and the safety of the equipment.

[0030] On the basis of the above technical solution, optionally, the power distribution bus device 200 includes a bus, on which sensors and a bus communication module are provided, the sensor is used to monitor the line status of the bus in real time, and the bus communication module is used to upload the line status to the centralized monitoring and management subsystem in real time.

[0031] Specifically, the power distribution bus device 200 can use a bus with a sensor to monitor the line status such as current, voltage and temperature on the bus in real time to ensure the safe operation of the bus. At the same time, the power distribution bus device 200 can upload the monitored line status to the centralized monitoring and management subsystem in real time through the bus communication module therein, so as to facilitate centralized remote monitoring by the staff. Among them, the current monitoring range of the bus can be 0-1000A, the voltage monitoring range can be AC380V±10%, AC220V±10%, and the temperature monitoring range can be -20℃-100℃.

[0032] Further optionally, the power distribution bus device 200 further includes a branch connector for connecting the bus to each of the branch circuits; the branch connector is provided with a connector communication module for uploading the connection status to the centralized monitoring and management subsystem in real time, thereby facilitating centralized remote monitoring by staff.

[0033] On the basis of the above technical solution, optionally, the centralized monitoring and management subsystem is also used to predict potential system failures based on historical and real-time system data using a machine learning algorithm; the system data includes at least one of the switch status, the fault information, the power status uploaded by the dual power switching device 100, the switching status uploaded by the dual power switching device 100, the line status uploaded by the power distribution bus device 200, and the connection status uploaded by the power distribution bus device 200.

[0034] Specifically, due to environmental factors or long-term use, the air switch may have poor contact or cannot be opened and closed normally. In the traditional solution, there is a lack of real-time monitoring and early warning mechanism for the status of the air switch, which makes it difficult to detect the failure of the air switch in time. Similarly, it is difficult to detect the potential failures of other components of the system in advance, resulting in a greater impact on the system operation. The centralized monitoring and management subsystem can also include a fault diagnosis and early warning module, which can predict the potential failure of the system based on the various system data received, using machine learning algorithms, and can send out early warning signals to prompt the staff to perform maintenance. Through real-time monitoring and early warning functions, potential faults can be detected in advance, the impact of sudden faults on the system can be reduced, and the service life of the equipment can be extended. Specifically, the equipment failure rate can be reduced by 30%, the equipment life can be extended by 15%, and the early warning accuracy can reach more than 95%. At the same time, through preventive maintenance and intelligent diagnosis, the workload of manual inspection and troubleshooting is reduced, and the labor intensity is reduced, thereby reducing maintenance costs (specifically up to 25%) and maintenance time (specifically up to 30%). It also improves the safety of the system and reduces safety accidents caused by faults.

[0035] Through the above-mentioned intelligent monitoring and management methods, the performance of the power management system is fully optimized, and the defects of the existing technology, such as insufficient intelligence level, low efficiency of fault location and maintenance, over-tripping, risk of air switch failure, and lack of preventive maintenance methods, are solved, which significantly improves the intelligence level, reliability, maintenance efficiency and operation convenience of the system. At the same time, by supporting multiple industrial communication protocols, data transmission and command interaction between various devices are also ensured. Thus, it can provide strong support for the stable operation of thermal power plants.

[0036] The intelligent power management system for thermal control systems of thermal power plants provided in the embodiments of the present invention includes a dual power switching device, through which an external power supply is supplied, and distributed to a plurality of branch circuits through a power distribution bus device, each branch circuit including at least one intelligent air switch. Each intelligent air switch includes a switch monitoring module and a switch processing module, wherein the switch monitoring module is used to monitor the switch status of the corresponding intelligent air switch in real time, and the switch processing module is used to identify fault information in real time according to the corresponding switch status. By providing a switch monitoring module and a switch processing module in the air switch, real-time monitoring and fault identification of each branch circuit are realized, so that the fault location can be quickly located when power is cut off, reducing the time for finding the fault location, and significantly improving the reliability and maintenance efficiency of the system.

[0037] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An intelligent power management system for thermal control systems of thermal power plants, characterized in that: The system includes a dual power switching device, through which an external power source is supplied and distributed to a plurality of branch circuits through a power distribution bus device, each of which includes at least one intelligent air switch; The intelligent air switch includes a switch monitoring module and a switch processing module. The switch monitoring module is used to monitor the switch state of the intelligent air switch in real time, and the switch processing module is used to identify fault information in real time according to the switch state.

2. The intelligent power management system for thermal control systems of thermal power plants according to claim 1, characterized in that: The system also includes a centralized monitoring and management subsystem; the intelligent air switch also includes a switch communication module, which is used to upload the switch status and / or the fault information to the centralized monitoring and management subsystem in real time; the centralized monitoring and management subsystem is used to determine the fault branch in real time according to the switch status and / or the fault information.

3. The intelligent power management system for thermal control systems of thermal power plants according to claim 2, characterized in that: The centralized monitoring and management subsystem is also used to restore power supply to non-fault branches through the switch communication module when an over-trip occurs.

4. The intelligent power management system for thermal control systems of thermal power plants according to claim 2, characterized in that: The dual power switching device includes a dual power switching controller and a contactor. The dual power switching controller is used to monitor the power status of the external power supply in real time and switch between the main power supply and the backup power supply through the contactor according to the power status.

5. The intelligent power management system for thermal control systems of thermal power plants according to claim 4, characterized in that: The dual power switching device further comprises a switching device communication module, which is used to upload the power status and / or switching status to the centralized monitoring and management subsystem in real time.

6. The intelligent power management system for thermal control systems of thermal power plants according to claim 4, characterized in that: The dual power switching device also includes an arc extinguishing circuit for reducing the damage of the electric arc to the contactor contacts during the switching process.

7. The intelligent power management system for thermal control systems of thermal power plants according to claim 2, characterized in that: The power distribution bus device includes a bus, on which sensors and a bus communication module are arranged. The sensor is used to monitor the line status of the bus in real time, and the bus communication module is used to upload the line status to the centralized monitoring and management subsystem in real time.

8. The intelligent power management system for thermal control systems of thermal power plants according to claim 7, characterized in that: The power distribution bus device also includes a branch connector for connecting the bus to each of the branch circuits; the branch connector is provided with a connector communication module for uploading the connection status to the centralized monitoring and management subsystem in real time.

9. The intelligent power management system for thermal control systems of thermal power plants according to claim 2, characterized in that: The centralized monitoring and management subsystem is also used to predict potential system failures based on historical and real-time system data using a machine learning algorithm; the system data includes at least one of the switch status, the fault information, the power status uploaded by the dual power switching device, the switching status uploaded by the dual power switching device, the line status uploaded by the power distribution bus device, and the connection status uploaded by the power distribution bus device.

10. The intelligent power management system for thermal control systems of thermal power plants according to claim 2, characterized in that: The centralized monitoring and management subsystem is also used to remotely control the opening and closing of each of the intelligent air switches based on user instructions.

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