Transformer forced oil circulation water-cooling water leakage monitoring control system based on PLC control

Abstract

The utility model relates to the technical field of monitoring and control of a power transformer cooling system, and provides a transformer forced oil circulation water-cooling water leakage monitoring and control system based on PLC control, which comprises a control module used for receiving an input signal of a water leakage detection module, carrying out logical judgment on the input signal and sending a control instruction to an execution module, the operation state and the fault condition of the whole system are monitored; the water leakage detection module is in communication connection with the control module and is used for detecting the water leakage condition of the overflowing pipeline and sending corresponding input signals to the control module according to different water leakage degrees; the execution module is used for controlling the opening and closing actions of the overflowing pipeline according to the control signal sent by the control module; the power module is used for providing power support for the control module, the water leakage detection module and the execution module, and the problems that an existing water leakage monitoring system cannot accurately judge the severity degree of water leakage and cannot automatically take corresponding countermeasures according to the water leakage degree are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of monitoring and controlling a power transformer cooling system, in particular to a transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control. Background Art

[0002] During the operation of large oil-immersed transformers, the effectiveness of the cooling system is directly related to the transformer's stable operation and lifespan. Forced oil circulation and water cooling systems have become an efficient and widely used cooling method, particularly in hot regions. This system circulates the transformer oil through a water cooler, effectively reducing the transformer's operating temperature and improving its efficiency and safety. However, over time, cooling water pipes may develop leaks for various reasons. Leaks not only reduce cooling effectiveness but can also cause serious consequences such as electrical failures, equipment damage, and even fire. Therefore, leak monitoring of cooling water pipes is particularly important.

[0003] Most water leak monitoring systems currently on the market combine simple leak detectors with monitoring systems. These systems typically only detect leaks, sending an alarm signal to the monitoring system when a leak is detected. However, these systems have significant limitations: they can only detect the occurrence of a leak but cannot accurately determine its severity, let alone automatically implement appropriate countermeasures based on the severity of the leak. Utility Model Content

[0004] The purpose of this utility model is to provide a transformer forced oil circulation water cooling leakage monitoring and control system based on PLC control, aiming to solve the problem that the existing leakage monitoring system cannot accurately judge the severity of the leakage and automatically take corresponding countermeasures according to the severity of the leakage.

[0005] The present invention is achieved through the following technical solutions:

[0006] A transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control, including:

[0007] The control module is used to receive input signals from the water leakage detection module, perform logical judgment on the input signals, issue control instructions to the execution module, and monitor the operating status and fault conditions of the entire system;

[0008] The water leakage detection module is in communication with the control module and is used to detect water leakage in the flow pipe and send corresponding input signals to the control module according to different levels of water leakage;

[0009] An execution module, used to control the opening and closing actions of the flow pipe according to the control signal sent by the control module;

[0010] The power module is used to provide power support for the control module, water leakage detection module and execution module.

[0011] Optionally, the control module includes:

[0012] The switch input module is used to receive the water leakage signal from the water leakage detection module and convert the water leakage signal into a digital input signal to be transmitted to the central processing module;

[0013] The central processing module is used to receive the input signal of the switch input module, judge the water leakage according to the preset logic program in the central processing module, and issue corresponding control instructions and alarm information;

[0014] The switch output module is used to receive control instructions from the central processing module and convert the control instructions into control signals to drive the execution module.

[0015] Optionally, a display module is further included, which is connected to the central processing module and is used to display the operating status and alarm information of the system.

[0016] Optionally, the alarm information includes minor water leakage alarm information and major water leakage alarm information.

[0017] Optionally, the central processing module is a PLC central processing unit.

[0018] Optionally, it further includes: a power conversion module, wherein two ends of the power conversion module are respectively connected to the power module and the external power supply, and is used to convert the electric energy of the external power supply into the electric energy required by the system.

[0019] Optionally, the external power supply is 220V AC power, and the power conversion module is used to convert the 220V AC power of the external power supply into 24V DC power and supply it to the power module.

[0020] Optionally, the water leakage detection module has at least two pairs of normally open contacts, and at least the two pairs of normally open contacts are used to close corresponding normally open contacts according to different water leakage levels, and send closing signals of the corresponding normally open contacts to the control module.

[0021] Optionally, the water leakage detection module is a water leakage detector.

[0022] Optionally, the execution module is an electric valve system.

[0023] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0024] Real-time monitoring and accurate judgment: The water leakage detection module can realize real-time monitoring of water leakage in the flow pipe, accurately judge according to different leakage degrees, and send corresponding alarm signals to the control module in time, effectively avoiding false alarms or missed alarms, and improving the reliability and safety of the system.

[0025] Automatic control: The system integrates a PLC central processing unit as the central processing module, which can automatically determine the water leakage according to the preset logic program and issue corresponding control instructions; when a serious water leakage is detected, it automatically closes the flow pipe to prevent the leakage from further deteriorating, reducing damage to equipment and the environment, and also reducing the workload of operation and maintenance personnel.

[0026] Multiple alarm mechanisms: The system not only sends out an alarm signal when a water leak is detected, but also sends out minor water leak alarms and serious water leak alarms according to the degree of the leak, providing operation and maintenance personnel with rich information support, so that they can respond and handle the situation quickly according to the actual situation.

[0027] Intuitive display: The equipped display module can display the system's operating status and alarm information in real time, allowing operation and maintenance personnel to intuitively understand the system's working conditions, facilitating monitoring and troubleshooting.

[0028] Efficient power conversion: The power conversion module can convert external AC power into the DC power required by the system, which not only improves the stability and safety of the power supply, but also ensures the normal operation of each module in the system.

[0029] Strong system scalability: The system structure is reasonably designed, and the communication connection between modules is stable and reliable, which facilitates subsequent function expansion and system upgrades and can meet application requirements in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a transformer forced oil circulation water cooling leakage monitoring and control system based on PLC control provided in an embodiment of the utility model;

[0031] Icon: 1-water leakage detection module, 2-switch input module, 3-power conversion module, 4-power module, 5-central processing module, 6-display module, 7-switch output module, 8-execution module, 9-overcurrent pipe. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Example 1

[0034] A transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control, characterized by comprising:

[0035] The control module is used to receive the input signal from the water leakage detection module 1, perform logical judgment on the input signal, issue control instructions to the execution module 8, and monitor the operating status and fault conditions of the entire system;

[0036] Leakage detection module 1, the leakage detection module 1 is communicatively connected to the control module, and is used to detect leakage in the flow pipe 9, and send corresponding input signals to the control module according to different degrees of leakage; in this embodiment, the leakage detection module 1 can be a leakage detector, and the leakage detection module 1 has at least two pairs of normally open contacts, and at least two pairs of normally open contacts are used to close the corresponding normally open contacts according to different degrees of leakage, and send the closing signals of the corresponding normally open contacts to the control module. The control module judges the degree of leakage according to the closing signal of the normally open contact, sends corresponding control instructions to the execution module 8 according to the degree of leakage, and sends corresponding alarm signals to the operation and maintenance personnel, and the operation and maintenance personnel make corresponding operation and maintenance measures according to the alarm signals.

[0037] The execution module 8 is used to control the opening and closing of the flow pipe 9 according to the control signal issued by the control module. In this embodiment, the execution module 8 can be an electric valve system, and the execution module 8 controls the opening and closing of the flow pipe 9 according to the corresponding control instructions issued by the control module.

[0038] The power supply module 4 is used to provide power support for the control module, the water leakage detection module 1 and the execution module 8; in this embodiment, the power supply module 4 can be a DC power supply, used to provide corresponding DC power to the system.

[0039] Example 2

[0040] Reference Figure 1 Based on Example 1, in this embodiment, the control module includes:

[0041] The switch input module 2 is used to receive the water leakage signal from the water leakage detection module 1 and convert the water leakage signal into a digital input signal and transmit it to the central processing module 5;

[0042] The central processing module 5 is used to receive the input signal of the switch input module 2, judge the water leakage situation according to the preset logic program in the central processing module 5, and issue corresponding control instructions and alarm information; in this embodiment, the central processing module 5 can be a PLC central processor, and the control program is preset through the corresponding programming language, which can be C language, Java, Python, etc.; the alarm information includes minor water leakage alarm information and serious water leakage alarm information.

[0043] The switch output module 7 is used to receive control instructions from the central processing module 5 and convert the control instructions into control signals to drive the execution module 8.

[0044] In this embodiment, a display module 6 is further included. The display module 6 is connected to the central processing module 5 and is used to display the operating status and alarm information of the system. The display module 6 can be an LED display screen.

[0045] This embodiment also includes a power conversion module 3. The power conversion module 3 is connected to the power module 4 and the external power source at both ends, respectively, and is used to convert the power from the external power source into the power required by the system. The external power source can be 220V AC. The power conversion module 3 is used to convert the 220V AC power from the external power source into 24V DC power through an AC / DC converter and supply it to the power module 4. The power module 4 then provides the DC power to the corresponding modules in the system.

[0046] When a slight water leak occurs in the overflow pipe 9, the first pair of normally open contacts of the water leakage detection module 1 is closed, and the water leakage detection module 1 sends the action signal of the first pair of normally open contacts to the switch input module 2. The switch input module 2 converts the analog signal into a digital signal and sends it to the central processing module 5. The central processing module 5 determines that a slight water leak occurs in the overflow pipe 9 according to a preset control program, displays an alarm signal of a slight water leak in the main transformer cooling control system through the display module 6, and sends the slight water leak alarm signal to the operation and maintenance personnel, but does not send a control signal to close the overflow pipe 9 to the execution module 8. The operation and maintenance personnel take corresponding operation and maintenance measures according to the slight water leak alarm signal;

[0047] When a serious water leakage occurs in the overflow pipe 9, the second pair of normally open contacts of the water leakage detection module 1 is closed, and the water leakage detection module 1 sends the action signal of the second pair of normally open contacts to the switch input module 2. The switch input module 2 converts the analog signal into a digital signal and sends it to the central processing module 5. The central processing module 5 determines that a serious water leakage occurs in the overflow pipe 9 according to the preset control program, displays the alarm signal of serious water leakage of the main transformer cooling control system through the display module 6, and sends a minor water leakage alarm signal to the operation and maintenance personnel, and at the same time sends a control signal to close the overflow pipe 9 to the execution module 8. The operation and maintenance personnel take corresponding operation and maintenance measures according to the serious water leakage alarm signal.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A transformer forced oil circulation water cooling leakage monitoring and control system based on PLC control, characterized in that: include: A control module is used to receive input signals from the water leakage detection module (1), perform logical judgment on the input signals, issue control instructions to the execution module (8), and monitor the operating status and fault conditions of the entire system; A water leakage detection module (1), the water leakage detection module (1) is in communication with the control module and is used to detect water leakage in the flow pipe (9) and send corresponding input signals to the control module according to different levels of water leakage; An execution module (8) is used to control the opening and closing of the flow pipe (9) according to the control signal sent by the control module; The power supply module (4) is used to provide power support for the control module, the water leakage detection module (1) and the execution module (8).

2. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control as claimed in claim 1, characterized in that: The control module includes: A switch input module (2) is used to receive a water leakage signal from the water leakage detection module (1), and convert the water leakage signal into a digital input signal and transmit it to the central processing module (5); The central processing module (5) is used to receive the input signal of the switch input module (2), judge the water leakage situation according to the logic program preset in the central processing module (5), and issue corresponding control instructions and alarm information; The switch output module (7) is used to receive the control instruction of the central processing module (5) and convert the control instruction into a control signal to drive the execution module (8).

3. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control as claimed in claim 2 is characterized in that: It also includes a display module (6), which is connected to the central processing module (5) and is used to display the operating status and alarm information of the system.

4. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control as claimed in claim 3 is characterized in that: The alarm information includes minor water leakage alarm information and serious water leakage alarm information.

5. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control as claimed in claim 2 is characterized in that: The central processing module (5) is a PLC central processing unit.

6. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control according to claim 1 is characterized in that: Also includes: The power conversion module (3) has two ends connected to the power module (4) and the external power supply, respectively, and is used to convert the electric energy of the external power supply into the electric energy required by the system.

7. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control according to claim 6 is characterized in that: The external power supply is 220V alternating current, and the power conversion module (3) is used to convert the 220V alternating current of the external power supply into 24V direct current and supply the direct current to the power supply module (4).

8. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control according to claim 1 is characterized in that: The water leakage detection module (1) has at least two pairs of normally open contacts, and at least the two pairs of normally open contacts are used to close corresponding normally open contacts according to different water leakage levels, and send closing signals of the corresponding normally open contacts to the control module.

9. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control according to any one of claims 1 to 8, characterized in that: The water leakage detection module (1) is a water leakage detector.

10. The transformer forced oil circulation water cooling water leakage monitoring and control system based on PLC control according to any one of claims 1 to 8, characterized in that: The execution module (8) is an electric valve system.

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