A power supply circuit for a converter valve cooling system

Abstract

The present invention discloses a power supply circuit for a converter valve cooling system, comprising: a 24V DC power supply circuit, a CPU power module, an IM interface module, a touch screen, an OLM photoelectric module, an instrument sensor, and a signal isolation sensor. A separate power switch is provided for each of the CPU power module, the IM interface module, the touch screen, the OLM photoelectric module, the instrument sensor, and the signal isolation sensor, and each power switch is connected to the 24V DC power supply circuit. A power switch-off signal is provided for each power switch, and the power switch-off signal is transmitted to a DI module of a control system via an electrical connection line. The DI module processes the received power switch-off signal to generate a DI signal, thereby improving the reliability and stability of the valve cooling control and protection system.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power equipment, and more particularly, relates to a power supply circuit of a converter valve cooling system. Background Art

[0002] Converter valves play a critical role in power systems, and their proper operation is crucial for ensuring the stability and reliability of power supply. The converter valve internal cooling system consists of a primary cooling water loop and a secondary cooling water loop. The primary cooling water loop includes equipment such as a primary circulation pump, mechanical filter, electric heater, electric three-way valve, check valve, and degassing tank. The secondary cooling water loop includes a deionized water system, a pressure stabilization system, and a water makeup system.

[0003] The valve cooling control and protection system utilizes a redundant CPU control unit, electrically configured as an A / B system, and equipped with self-diagnostic capabilities. If a fault occurs in one of the redundant control units, it automatically and seamlessly switches to the backup control unit without loss of information, alarms, or interruptions. Furthermore, the system's power supply modules, I / O modules, interface modules, and communication modules are also redundant.

[0004] In the prior art, valve cooling control and protection systems lack independent circuit breakers for downstream devices connected to the 24V DC power supply. Consequently, if an anomaly or fault occurs in the power circuit of these downstream devices, it can cause power loss to other devices in the control cabinet, leading to single-system operation of the valve cooling system. If an anomaly or fault occurs in the 24V DC power circuit of a device, the valve cooling system may operate in a single-system mode, posing a significant risk to its safe and stable operation, reducing system reliability and stability.

[0005] Therefore, how to improve the reliability and stability of the valve cooling control and protection system is a key issue that those skilled in the art are concerned about. Summary of the Invention

[0006] The purpose of this application is to provide a power supply circuit for a converter valve cooling system to improve the reliability and stability of the valve cooling control and protection system.

[0007] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a power supply circuit of a converter valve cooling system, comprising:

[0008] 24V DC power supply circuit, CPU power module, IM interface module, touch screen, OLM photoelectric module, instrument sensor, signal isolation sensor;

[0009] A separate power switch is provided for each of the CPU power module, the IM interface module, the touch screen, the OLM photoelectric module, the instrument sensor, and the signal isolation sensor, and each of the power switches is connected to the 24V DC power supply circuit;

[0010] A power switch not-closed signal is set for each power switch, and the power switch not-closed signal is transmitted to a DI module of the control system through an electrical connection line. The DI module is used to perform signal processing based on the received power switch not-closed signal to obtain a DI signal.

[0011] Optionally, the power switch off signal is transmitted to the DI module of the control system through the electrical connection line in the form of a normally closed contact.

[0012] Optionally, also include:

[0013] The PLC module is used to process the power switch not-closed signal to obtain switch status information, and send the switch status information to the control and protection system through the communication bus.

[0014] Optionally, the PLC module is further used to process alarm information according to the DI signal to obtain alarm processing information.

[0015] Optionally, it also includes: a human-computer interaction module, used to display the alarm processing information through a human-computer interaction interface.

[0016] Optionally, it also includes: a power switch monitoring module, which is used to obtain the operating parameters of each power switch in real time; wherein the operating parameters include: current and voltage fluctuations; and realize remote control function so that the corresponding power switch can be operated through a remote terminal.

[0017] Optionally, it also includes: a power distribution system for adjusting the power distribution strategy according to the real-time power data of different devices in the valve cooling system.

[0018] Optionally, it also includes: a fault prediction system for collecting historical operating data of each device in the 24V DC power supply circuit; wherein the historical operating data includes power switch status, device power consumption, and temperature; training an inference model based on the historical operating data to obtain a fault prediction model; analyzing the real-time data of the power circuit through the fault prediction model to obtain power circuit fault prediction data.

[0019] The present application provides a power supply circuit for a converter valve cooling system, comprising: a 24V DC power supply circuit, a CPU power module, an IM interface module, a touch screen, an OLM photoelectric module, an instrument sensor, and a signal isolation sensor; a separate power switch is provided for each of the CPU power module, the IM interface module, the touch screen, the OLM photoelectric module, the instrument sensor, and the signal isolation sensor, and each of the power switches is connected to the 24V DC power supply circuit; a power switch-off signal is provided for each of the power switches, and the power switch-off signal is transmitted to a DI module of a control system via an electrical connection line; the DI module is configured to perform signal processing based on the received power switch-off signal to obtain a DI signal.

[0020] It has the following beneficial effects:

[0021] The independent power switch effectively prevents a single device's power circuit failure from affecting other devices. In related technologies, a power circuit failure in a lower-level device can cause a simultaneous power outage in other devices in the control cabinet. However, with this invention, even if a single device's power circuit fails, other devices can continue to operate normally, eliminating the risk of operating the valve cooling system in isolation and significantly improving overall system stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0023] Figure 1 A schematic structural diagram of a power supply circuit of a converter valve cooling system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The purpose of this application is to provide a power supply circuit for a converter valve cooling system to improve the reliability and stability of the valve cooling control and protection system.

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0026] The following describes a power supply circuit of a converter valve cooling system provided by the present application through an embodiment.

[0027] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a power supply circuit of a converter valve cooling system provided in an embodiment of the present application.

[0028] In this embodiment, the loop may include:

[0029] 24V DC power supply circuit 10, CPU power module 20, IM interface module 30, touch screen 40, OLM photoelectric module 50, instrument sensor 60, signal isolation sensor 70;

[0030] A separate power switch 80 is provided for each of the CPU power module 20, the IM interface module 30, the touch screen 40, the OLM photoelectric module 50, the instrument sensor 60, and the signal isolation sensor 70. Each power switch 80 is connected to a 24V DC power supply circuit 10.

[0031] A power switch not-closed signal is set for each power switch 80, and the power switch not-closed signal is transmitted to the DI module of the control system through an electrical connection line. The DI module is used to perform signal processing based on the received power switch not-closed signal to obtain a DI signal.

[0032] The 24V DC power supply circuit 10 serves as the energy source for the entire system, providing the necessary power for all other modules. The CPU power module 20, IM interface module 30, touch screen 40, OLM optoelectronic module 50, instrument sensor 60, and signal isolation sensor 70 are key components required for the proper operation of the valve cooling system. By providing a separate power switch 80 for each component, independent power supply is achieved. When a component's power circuit experiences an abnormality, only that component's power switch 80 is affected, preventing the fault from spreading and causing power outages in other devices. The power switch "off" signal is transmitted via an electrical connection to the control system's DI module. The DI module processes the received signal to determine the status of each power switch 80, thereby monitoring and managing the entire power circuit to ensure stable system operation.

[0033] Component connection: First, connect the 24V DC power supply circuit 10 with the CPU power module 20, IM interface module 30, touch screen 40, OLM photoelectric module 50, instrument sensor 60, and signal isolation sensor 70. When connecting, ensure that the electrical connection between each component and the power supply circuit is stable and reliable, and equip each component with a separate power switch 80, so that the power switch 80 is correctly connected in series between the component and the power supply circuit.

[0034] Signal Transmission Settings: For each power switch 80, a mechanism is set up to generate and transmit a power switch not-closed signal. A device (such as a sensor) capable of generating a power switch not-closed signal is connected to the power switch 80, and this signal is transmitted to the control system's DI module via an electrical connection line. In actual operation, it is important to ensure that the signal transmission line is laid out properly to avoid interference and ensure that the DI module can accurately receive the signal. This way, when the power switch 80 is not closed, the DI module can promptly receive and process the signal.

[0035] In summary, this embodiment effectively prevents a single device's power circuit failure from affecting other devices by providing an independent power switch 80. In related art, a power circuit failure in a lower-level device can cause a simultaneous power outage in other devices in the control cabinet. However, in this embodiment, even if a power circuit failure occurs in a single device, other devices can continue to operate normally, eliminating the risk of operating the valve cooling system in isolation and significantly improving overall system stability.

[0036] Optionally, the power switch off signal is transmitted to the DI module of the control system through the electrical connection line in the form of a normally closed contact.

[0037] This alternative solution specifies a specific method for transmitting the power switch not-closed signal: it uses a normally closed contact method via an electrical connection line to the control system's DI module. Normally, the normally closed contact is closed. When the power switch 80 is not closed, the contact state changes, generating a signal change. This method ensures stable and reliable transmission of the power switch not-closed signal to the DI module, enabling the DI module to promptly and accurately detect abnormalities in the power switch 80 state, providing a stable signal source for subsequent system evaluation and processing of the power circuit status.

[0038] Optionally, also include:

[0039] The PLC module is used to process the power switch not-closed signal, obtain switch status information, and send the switch status information to the control and protection system through the communication bus.

[0040] This optional solution incorporates a PLC module. The PLC module processes the power switch "off" signal, obtains switch status information, and transmits this information to the control and protection system via the communication bus. This enables the control and protection system to obtain detailed status information about the power switch 80 in real time, allowing for timely monitoring of the operating status of each device's power circuit during system operation. When an anomaly occurs, more accurate fault diagnosis and appropriate protective measures can be implemented, enhancing the system's ability to monitor and manage the power circuit status.

[0041] Optionally, the PLC module is further used to process alarm information according to the DI signal to obtain alarm processing information.

[0042] In this alternative, the PLC module is equipped to process alarm information based on DI signals, generating alarm handling information. Upon receiving the DI signal, the PLC module uses pre-defined logic to determine whether an alarm is necessary, the alarm type, and the alarm level, and then generates corresponding alarm handling information. This helps the system promptly identify potential fault risks and provides accurate alarm notifications to operators, enabling them to take timely action and improve system safety and reliability.

[0043] Optionally, it also includes: a human-computer interaction module, which is used to display alarm processing information through a human-computer interaction interface.

[0044] This option introduces a human-computer interaction module. This module displays alarm processing information through a human-computer interaction interface, allowing operators to intuitively understand the alarm status of the system, including detailed information such as the alarm location and cause. Based on this information, operators can quickly respond and take appropriate actions to resolve the problem. This improves system operability and the convenience of human-computer interaction, facilitates timely troubleshooting, and ensures normal system operation.

[0045] Optionally, it also includes: a power switch 80 monitoring module, which is used to obtain the operating parameters of each power switch 80 in real time; wherein the operating parameters include: current and voltage fluctuations; and realize remote control function so that the corresponding power switch 80 can be operated through a remote terminal.

[0046] This optional solution adds a power switch 80 monitoring module. This module can obtain real-time operating parameters of each power switch 80, such as current and voltage fluctuations. By monitoring these operating parameters, it is possible to determine in real time whether the power switch 80 is operating normally and whether there are potential failure risks. At the same time, this module also implements remote control capabilities, allowing operators to operate the corresponding power switch 80 through a remote terminal, such as remotely turning the power switch 80 on or off. This greatly improves the maintenance convenience and flexibility of the system, especially in situations where on-site operation is inconvenient, allowing timely control of the power switch 80 to ensure stable system operation.

[0047] Optionally, it also includes: a power distribution system for adjusting the power distribution strategy according to the real-time power data of different devices in the valve cooling system.

[0048] This option incorporates a power distribution system. This system adjusts power allocation strategies based on real-time power data from different devices in the valve cooling system. Because power requirements may vary across devices in different operating states, the power distribution system dynamically optimizes power distribution to ensure that each device receives the appropriate power supply. This prevents malfunctions and power waste caused by improper power allocation, improving the energy efficiency and operational stability of the entire valve cooling system.

[0049] Optionally, it also includes: a fault prediction system for collecting historical operating data of each device in the 24V DC power supply circuit 10; wherein the historical operating data includes the status of the power switch 80, device power consumption, and temperature; training an inference model based on the historical operating data to obtain a fault prediction model; analyzing the real-time data of the power circuit through the fault prediction model to obtain power circuit fault prediction data.

[0050] This optional solution further includes a fault prediction system. This system collects historical operating data for each device in the 24V DC power supply circuit 10, including information such as the status of the power switch 80, device power consumption, and temperature. An inference model is trained based on this historical data to generate a fault prediction model. This fault prediction model is then used to analyze real-time power circuit data to generate power circuit fault prediction data. This enables the system to predict potential faults in advance, allowing preventive measures to be taken before a fault occurs, such as replacing aging equipment and adjusting operating parameters. This significantly improves system reliability and maintainability, reducing system downtime and losses caused by sudden failures.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0052] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0053] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0054] The above provides a detailed introduction to the power supply circuit of a converter valve cooling system provided by this application. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of this application. It should be noted that those skilled in the art may make various improvements and modifications to this application without departing from the principles of this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A power supply circuit for a converter valve cooling system, characterized in that: include: 24V DC power supply circuit, CPU power module, IM interface module, touch screen, OLM photoelectric module, instrument sensor, signal isolation sensor; A separate power switch is provided for each of the CPU power module, the IM interface module, the touch screen, the OLM photoelectric module, the instrument sensor, and the signal isolation sensor, and each of the power switches is connected to the 24V DC power supply circuit; A power switch not-closed signal is set for each power switch, and the power switch not-closed signal is transmitted to a DI module of the control system via an electrical connection line, wherein the DI module is configured to perform signal processing based on the received power switch not-closed signal to obtain a DI signal; wherein the power switch not-closed signal is transmitted to the DI module of the control system via the electrical connection line in a normally closed contact manner; A PLC module is configured to process the power switch not-closed signal to obtain switch status information, and transmit the switch status information to a control and protection system via a communication bus; wherein the PLC module is further configured to process alarm information according to the DI signal to obtain alarm processing information; A power switch monitoring module is used to obtain the operating parameters of each power switch in real time; wherein the operating parameters include current and voltage fluctuations; and implement remote control functions so that the corresponding power switch can be operated through a remote terminal; Power distribution system, used to adjust power distribution strategy based on real-time power data of different devices in the valve cooling system; A fault prediction system is used to collect historical operating data of each device in a 24V DC power supply circuit; the historical operating data includes power switch status, device power consumption, and temperature; an inference model is trained based on the historical operating data to obtain a fault prediction model; and the real-time data of the power supply circuit is analyzed using the fault prediction model to obtain power supply circuit fault prediction data.

2. The power supply circuit according to claim 1, characterized in that: Also includes: The human-computer interaction module is used to display the alarm processing information through a human-computer interaction interface.

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