A control method, apparatus, equipment and storage medium for a roof drainage system.

Abstract

This application discloses a control method, device, equipment, and storage medium for a top-cover drainage system. The method includes fixing and installing sequentially distant high-alarm liquid level, emergency pump start liquid level, standby pump start liquid level, main pump start liquid level, and normally open / stop pump liquid level on the top cover. The water level is sequentially reached and passed through the normally open / stop pump liquid level, main pump start liquid level, standby pump start liquid level, emergency pump start liquid level, and high-alarm liquid level, thereby generating corresponding liquid level signals in sequence. This application strictly follows the step sequence, enabling mutual verification and self-checking between adjacent liquid levels. When a liquid level exceeds a certain level and generates a signal, it indicates a malfunction in the liquid level sensing component of this application. Compared to existing single floats, this application activates different pumps at different liquid levels and shuts down the turbine generator unit when the water level reaches the high-alarm liquid level. This avoids the problem of a single float being locked by silt, causing the drainage pump to fail to start and stop automatically, resulting in unplanned shutdown of the turbine generator unit.

Description

Technical Field

[0001] This application relates to the field of hydropower technology, and in particular to a control method, device, equipment and storage medium for a roof drainage system. Background Technology

[0002] The top cover drainage system is an essential auxiliary system for hydro-generator units. When the hydro-generator unit is generating or shut down, water may accumulate on the top cover due to reasons such as leakage in the guide vane bushing or leakage between the top cover and the main shaft. At this time, it is necessary to drain the leaking water through the top cover drainage system to prevent excessive water accumulation from flooding the plant and causing unplanned shutdown of the hydro-generator unit.

[0003] Currently, the traditional top-cover drainage system control method uses a float switch as the liquid level control signal source. The magnet inside the float attracts the contacts of the reed switch, generating an opening and closing action to control or indicate the liquid level. However, the float switch is immersed in river water with high silt content for a long time, and the surface of the float and the sliding rod is covered with thick silt, which prevents the float from sliding freely. This makes the control system unreliable and can easily cause the drainage pump to fail to start and stop automatically, which in turn leads to unplanned shutdown of the hydro-generator unit. Summary of the Invention

[0004] The main objective of this application is to provide a control method, device, equipment, and storage medium for a roof drainage system, in order to solve the problem that the drainage system in the prior art is unreliable and easily causes the drainage pump to fail to start and stop automatically.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A control method for a top cover drainage system, wherein the top cover drainage system is applied to the drainage pump of a hydro-generator unit, the top cover drainage system includes a liquid level sensing component fixedly installed on the side of the top cover of the hydro-generator unit adjacent to the water body below, the liquid level sensing component including, in sequence, excessively high alarm liquid level, emergency pump start liquid level, standby pump start liquid level, main pump start liquid level, and normally open / stop pump liquid level away from the top cover, the control method comprising:

[0007] Step S1: In response to the disappearance of the first signal of the normally open pump stop level, determine whether the main pump start level generates a second signal;

[0008] Step S2: If the main pump level generates the second signal, then the main pump in the drain pump is started according to the second signal;

[0009] Step S3: Determine whether the standby pump level generates a third signal;

[0010] Step S4: If the standby pump level generates the third signal, then the standby pump in the drainage pump is started according to the third signal.

[0011] Step S5: Determine whether the emergency pump level has generated a fourth signal;

[0012] Step S6: If the emergency pump level generates the fourth signal, then the emergency pump in the drain pump is activated according to the fourth signal.

[0013] Step S7: Determine whether the excessively high alarm liquid level generates a fifth signal;

[0014] Step S8: If the excessively high alarm liquid level generates the fifth signal, then the hydro-generator unit is shut down according to the fifth signal.

[0015] As a further improvement of this application, the liquid level sensing assembly further includes a first float sensor fixedly mounted on the inner wall of the top cover. The first float sensor is located below the normally open / stopped pump liquid level. After step S2, the following steps are included:

[0016] The sensed liquid level of the first float sensor is obtained and used as the main signal liquid level;

[0017] Determine whether the main signal liquid level is greater than the main pump start liquid level and less than the standby pump start liquid level;

[0018] If so, then generate a main pump start signal based on the current main signal liquid level;

[0019] Ignore the second signal and start the main pump according to the main pump start signal.

[0020] As a further improvement to this application, after obtaining the sensed liquid level of the first float sensor and using it as the main signal liquid level, the method includes:

[0021] Determine whether the main signal liquid level is greater than the standby pump liquid level and less than the emergency pump liquid level;

[0022] If so, then generate a start-up pump signal based on the current master signal level;

[0023] Ignore the third signal and start the standby pump according to the standby pump start signal.

[0024] As a further improvement to this application, after obtaining the sensed liquid level of the first float sensor and using it as the main signal liquid level, the method includes:

[0025] Determine whether the main signal liquid level is greater than the emergency pump start liquid level and less than the over-high alarm liquid level;

[0026] If so, an emergency pump start signal will be generated based on the current master signal level.

[0027] Ignore the fourth signal and start the emergency pump according to the emergency pump start signal.

[0028] As a further improvement to this application, after obtaining the sensed liquid level of the first float sensor and using it as the main signal liquid level, the method includes:

[0029] Determine whether the main signal liquid level is greater than the over-high alarm liquid level;

[0030] If so, a shutdown signal is generated based on the current master signal level;

[0031] Ignore the fifth signal and shut down the hydro-generator unit according to the shutdown signal.

[0032] As a further improvement of this application, the liquid level sensing assembly further includes a second float sensor fixedly mounted on the inner sidewall of the top cover. The second float sensor is located at the same height as the first float sensor and is spaced at a preset distance from the first float sensor. After acquiring the liquid level sensed by the first float sensor and using it as the main signal liquid level, the assembly includes:

[0033] The sensed liquid level of the second float sensor is obtained and used as the secondary signal liquid level;

[0034] Determine whether the height difference between the secondary signal liquid level and the primary signal liquid level is less than a preset threshold.

[0035] If not, ignore the main signal level and proceed with steps S1 to S8.

[0036] As a further improvement to this application, the sensed liquid level of the second float sensor is obtained and used as the secondary signal liquid level, and then the process includes:

[0037] Determine whether the main signal liquid level and the secondary signal liquid level exceed the preset range;

[0038] If at least one of the main signal liquid level and the secondary signal liquid level exceeds the preset range, then the main signal liquid level is ignored and steps S1 to S8 are executed.

[0039] To achieve the above objectives, this application also provides the following technical solutions:

[0040] A control device for a roof drainage system, wherein the control device is applied to the roof drainage system control method described above, and the control device for the roof drainage system includes:

[0041] The first module for signal acquisition and judgment is used to determine whether the second signal for the main pump start-up level is generated in response to the disappearance of the first signal of the normally open pump stop level.

[0042] The main pump start module is used to start the main pump in the drain pump according to the second signal if the main pump level generates the second signal.

[0043] The signal acquisition and judgment second module is used to determine whether the standby pump liquid level generates a third signal;

[0044] A standby pump activation module is used to activate the standby pump in the drainage pump according to the third signal generated by the standby pump level.

[0045] The third module for signal acquisition and judgment is used to determine whether the emergency pump level generates a fourth signal.

[0046] An emergency pump activation module is used to activate the emergency pump in the drainage pump according to the fourth signal generated by the emergency pump level.

[0047] The fourth module for signal acquisition and judgment is used to determine whether the excessively high alarm liquid level generates a fifth signal.

[0048] The hydro-generator unit shutdown module is used to shut down the hydro-generator unit according to the fifth signal generated by the excessively high alarm liquid level.

[0049] To achieve the above objectives, this application also provides the following technical solutions:

[0050] An electronic device includes a processor and a memory coupled to the processor, the memory storing program instructions executable by the processor; when the processor executes the program instructions stored in the memory, it implements a control method for a top cover drainage system as described above.

[0051] To achieve the above objectives, this application also provides the following technical solutions:

[0052] A storage medium storing program instructions, which, when executed by a processor, implement a control method for a top cover drainage system as described above.

[0053] This application uses a method of fixing and installing sequentially arranged high-alarm liquid level, emergency pump start liquid level, standby pump start liquid level, main pump start liquid level, and normally open / stop pump liquid level on the top cover. The water level is arranged from low to high, reaching and passing through these levels sequentially, thus generating corresponding liquid level signals. This application strictly follows steps S1 to S8, enabling mutual verification and self-checking between adjacent liquid levels. If a signal is generated that exceeds a certain level (e.g., a third signal is generated at the next lower level than the second signal), it indicates a malfunction in the liquid level sensing component. Compared to existing single float sensors, this application activates different pumps at different liquid levels and shuts down the turbine generator unit when the water level reaches the high-alarm liquid level. This avoids the problem of a single float being locked by sediment, preventing the drainage pump from automatically starting and stopping, and thus causing unplanned shutdowns of the turbine generator unit. Attached Figure Description

[0054] Figure 1 This is a schematic flowchart of one embodiment of the control method for the roof drainage system of this application.

[0055] Figure 2 This is a schematic diagram of functional modules of an embodiment of the control method for the roof drainage system of this application;

[0056] Figure 3 A schematic diagram of functional modules of a control device for the roof drainage system of this application;

[0057] Figure 4 This is a schematic diagram of the structure of an embodiment of the electronic device of this application;

[0058] Figure 5 This is a schematic diagram of the structure of one embodiment of the storage medium of this application. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0060] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. 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 device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] like Figure 1 As shown, this embodiment provides an example of a control method for a top cover drainage system. In this embodiment, the top cover drainage system is applied to the drainage pump of a hydro-generator set. The top cover drainage system includes a liquid level sensing component fixedly installed on the side of the top cover of the hydro-generator set adjacent to the water body below. The liquid level sensing component includes, in sequence, the excessively high alarm liquid level, the emergency pump start liquid level, the standby pump start liquid level, the main pump start liquid level, and the normally open and stopped pump liquid level, which are located away from the top cover.

[0063] Preferably, the type of hydro-generator set in this embodiment is an axial-flow hydro turbine.

[0064] Specifically, the axial-flow turbine adopts a conventional design in the existing technology, mainly divided into an embedded part, a water guiding part, and a rotating part. This embodiment does not change the internal structure of the axial-flow turbine, and the structure of the axial-flow turbine is a mature, well-known, and directly obtainable existing technology. This embodiment will not provide a detailed description of the structure of the axial-flow turbine or show the accompanying drawings. In addition, the liquid level sensing component in this embodiment is only installed on the top cover and does not change the structure of the top cover.

[0065] The embedded part mainly includes components such as the volute, seat ring, impeller chamber, and tailrace pipe; the water guiding mechanism mainly includes components such as the bottom ring, top cover, guide vanes, control ring, relay, guide vane transmission components, and support cover; the rotating part mainly includes components such as the impeller, main shaft, water guide bearing, main shaft seal, operating oil pipe, and oil receiver.

[0066] Furthermore, in this embodiment, the liquid level sensing component is installed on the side of the top cover adjacent to the impeller. The liquid level sensing component includes an over-high alarm liquid level that gradually moves away from the top cover, an emergency pump start liquid level, a standby pump start liquid level, a main pump start liquid level, and a normally open / stop pump liquid level. It can be understood that the normally open / stop pump liquid level is closest to the water body. In actual application, the normally open / stop pump liquid level is immersed in the water body for a long time.

[0067] Specifically, the control method of this embodiment includes the following steps:

[0068] Step S1: In response to the disappearance of the first signal of the normally open pump stop level, determine whether the main pump start level generates a second signal.

[0069] Preferably, since the normally open pump stop level is in the normally open state when not in operation, it switches to the closed state after the normally open pump stop level comes into contact with the water.

[0070] Step S2: If the main pump level generates a second signal, then the main pump in the drain pump is started according to the second signal.

[0071] Step S3: Determine whether the standby pump level generates a third signal.

[0072] Step S4: If the standby pump level generates a third signal, then start the standby pump in the drainage pump according to the third signal.

[0073] Step S5: Determine whether the emergency pump level generates a fourth signal.

[0074] Step S6: If the emergency pump level generates a fourth signal, then the emergency pump in the drain pump is activated according to the fourth signal.

[0075] Step S7: Determine whether the high alarm liquid level generates a fifth signal.

[0076] Step S8: If the alarm liquid level is too high and a fifth signal is generated, the turbine generator set is shut down according to the fifth signal.

[0077] It should be noted that in order to achieve the mutual verification and self-testing functions of the above five liquid levels, steps S1 to S8 need to be strictly executed in sequence during actual application. By utilizing the continuous characteristics of water, the start and stop functions of different pumps can be realized when the water passes through the above five liquid levels in sequence.

[0078] Furthermore, in practical applications, after multiple fault simulations of the above five liquid level detections, the following defects exist: (1) When the pump stop liquid level signal disappears, the main pump start liquid level signal exists, the drain pump starts, the top cover liquid level drops until the pump stop liquid level is reached, and the drain pump stops. If the main pump start liquid level signal does not disappear with the drop in liquid level, but remains, the drain pump will start when the pump stop liquid level signal disappears with the rise in liquid level, resulting in the frequent switching of the drain pump's start and stop. (2) When the pump stop liquid level signal disappears, the main pump start liquid level signal exists, the drain pump starts, and the top cover liquid level drops. If the pump stop liquid level signal continues to disappear at this time, the drain pump will continue to start, resulting in the drain pump being unable to stop automatically.

[0079] After analyzing the above-mentioned faults, it was concluded that the root cause of the frequent alternation of the drainage pump's start and stop and the failure of the top cover drainage system to automatically stop the pump after reaching the stop water level was the float switch being immersed in river water with a high silt content for a long time. The float and slide rod were covered with a thick layer of silt, which prevented the float from sliding freely. As a result, the liquid level signals for starting and stopping the main pump could not change with the liquid level.

[0080] To address the aforementioned deficiencies, the liquid level sensing assembly in this embodiment further includes a first float sensor fixedly mounted on the inner wall of the top cover. The first float sensor is located below the normally open / stopped pump liquid level. Therefore, after step S2, the following steps are also included:

[0081] Step S10: Obtain the liquid level sensed by the first float sensor and use it as the main signal liquid level.

[0082] Step S11: Determine whether the main signal liquid level is greater than the main pump start liquid level and less than the standby pump start liquid level; if the main signal liquid level is greater than the main pump start liquid level and less than the standby pump start liquid level, then proceed to step S12.

[0083] Step S12: Generate a main pump start signal based on the current main signal liquid level.

[0084] Step S13: Ignore the second signal and start the main pump according to the main pump start signal.

[0085] Furthermore, after step S10, the following steps are also included:

[0086] Step S20: Determine whether the main signal liquid level is greater than the standby pump liquid level and less than the emergency pump liquid level; if the main signal liquid level is greater than the standby pump liquid level and less than the emergency pump liquid level, then proceed to step S21.

[0087] Step S21: Generate a standby pump start signal based on the current master signal liquid level.

[0088] Step S22: Ignore the third signal and start the standby pump according to the standby pump start signal.

[0089] Furthermore, after step S10, the following steps are also included:

[0090] Step S30: Determine whether the main signal liquid level is greater than the emergency pump start liquid level and less than the over-high alarm liquid level; if the main signal liquid level is greater than the emergency pump start liquid level and less than the over-high alarm liquid level, then proceed to step S31.

[0091] Step S31: Generate an emergency pump start signal based on the current master signal liquid level.

[0092] Step S32: Ignore the fourth signal and start the emergency pump according to the emergency pump start signal.

[0093] Furthermore, after step S10, the following steps are also included:

[0094] Step S40: Determine whether the main signal liquid level is greater than the over-high alarm liquid level; if the main signal liquid level is greater than the over-high alarm liquid level, then proceed to step S41.

[0095] Step S41: Generate a shut-off signal based on the current main signal liquid level.

[0096] Step S42: Ignore the fifth signal and shut down the hydro-generator unit according to the shutdown signal.

[0097] Preferably, the extension steps in this embodiment, from step S10 to step S42, are all based on the redundant control of the five liquid levels. When one or more of the five liquid levels fail, steps S10 to S42 are used, and the first to fifth signals are ignored. That is, the priority of the first float sensor is higher than that of the five liquid levels.

[0098] Furthermore, the liquid level sensing assembly also includes a second float sensor fixedly mounted on the inner wall of the top cover. The second float sensor is located at the same height as the first float sensor and is spaced at a preset distance from the first float sensor.

[0099] Preferably, in a conventional axial-flow turbine, the top cover is annular in shape, and the aforementioned support cover is provided at the center of the top cover. This structure is also a conventional structure of an axial-flow turbine. The purpose of this preferred embodiment is to point out that there are several protrusions (or partitions) arranged in a ring around the central axis of the top cover on the inner ring wall. These protrusions are also a conventional design of axial-flow turbines. In this embodiment, the first float sensor and the second float sensor are respectively installed in the two partitions closest to the liquid level sensing component.

[0100] Preferably, the lowest of the five liquid levels, the normally open and normally closed pump level, is 5 cm higher than the first float sensor and the second float sensor.

[0101] After acquiring the sensed liquid level from the first float sensor and using it as the main signal liquid level, the process includes:

[0102] The liquid level sensed by the second float sensor is obtained and used as the secondary signal liquid level.

[0103] Determine whether the height difference between the secondary signal liquid level and the primary signal liquid level is less than a preset threshold.

[0104] If not, ignore the main signal level and proceed to steps S1 to S8.

[0105] Further, the sensed liquid level of the second float sensor is acquired and used as the secondary signal liquid level, followed by:

[0106] Determine whether the main signal liquid level and the secondary signal liquid level exceed the preset range.

[0107] If at least one of the main signal level and the secondary signal level exceeds the preset range, the main signal level is ignored and steps S1 to S8 are executed.

[0108] Preferably, see Figure 2 The design intent of this embodiment is to: add analog control functionality, using the original analog signal 1 (float-type liquid level sensor 1, i.e., the first float-type liquid level sensor) as the main control signal, the original analog signal 2 (float-type liquid level sensor 2, i.e., the first float-type liquid level sensor) as the comparison signal, and adding a new analog signal (submersible liquid level sensor) as the monitoring and display signal. The original switch signal (five liquid level float switches) is used as a backup control signal. Two digital displays and two signal isolators are added inside the external top cover drainage control cabinet, namely digital display 1 and digital display 2, and isolator 1. And isolator 2; float-type liquid level sensor 1 serves as the main control signal, and two signals are led out through signal isolator 1. One signal is sent to the controller (PLC) as the main control signal, and the other signal is sent to digital display 1 for intuitive display; float-type liquid level sensor 2 serves as the comparison signal, and two signals are led out through signal isolator 2. One signal is sent to the controller (PLC) as the comparison signal, and the other signal is sent to digital display 2 to compare with digital display 1 as reference data; a new submersible liquid level sensor analog signal is sent to the monitoring system for upper computer display, and a new analog and digital quantity switching handle is added.

[0109] Preferably, according to the above design intent, the analog signal input by the original float-type liquid level sensor 1 is defaulted to the main signal, and the analog signal input by the original float-type liquid level sensor 2 is the backup signal. The digital signal is selected as the main signal when the following conditions occur:

[0110] ① The main signal is outside the range (range: 0mm-600mm).

[0111] ② When the difference between the main and backup analog signals is large (difference > 100 mm) and the switch signal for starting the backup pump level is present.

[0112] ③ When the main analog signal has poor quality.

[0113] ④ When manually switching to on / off control.

[0114] The pump is stopped, started, standby pump started, emergency pump started, and high-level alarm level are determined based on the main signal water level. The pump is started and stopped using the main signal.

[0115] Main pump start conditions: The main signal liquid level is greater than the pump stop liquid level and the main pump start liquid level (pump stop liquid level: 60; main pump start liquid level: 170);

[0116] Standby pump start-up conditions: The main signal liquid level is greater than the pump stop liquid level and the standby pump start-up liquid level (standby pump start-up liquid level: 260);

[0117] Emergency pump start conditions: The main signal level is greater than the pump stop level and the emergency pump start level (emergency pump start level: 350);

[0118] High liquid level alarm condition: The main signal liquid level is greater than the high liquid level alarm level (alarm level: 440).

[0119] In summary, after the above optimizations, this embodiment achieves the following optimization results in practical applications:

[0120] ① Improved reliability of control signals effectively solves problems such as frequent start-stop cycles of drainage pumps and the inability of the top cover drainage system to automatically stop pumps after reaching the stop water level: After the system upgrade, analog signals are used as the main control signals. The advantages of analog signals over digital signals are high reliability and visibility. The float level gauge uses a magnetic float as the measuring element. Through magnetic coupling, the resistance inside the sensor changes linearly. The intelligent converter converts the resistance change into a 4-20mA standard current signal, which is then sent to a digital display to convert into a liquid level value for intuitive display. It can also be sent to the controller to realize automatic detection, control and recording of liquid level.

[0121] ② The reliability of the top cover drainage system has been improved. The modified top cover drainage system has a dual control signal switching mode, which can switch between analog and digital signals. When the analog signal fails, it can switch to digital signal control. To improve the reliability of the digital signal, we adjusted the installation position of the float switch to be slightly higher than the float-type liquid level sensor. This way, the float of the float switch will not be immersed in the river water for a long time, greatly improving the reliability of the digital signal, thereby greatly improving the reliability and stability of the top cover drainage system.

[0122] ③ Improved accuracy of top cover liquid level recording: The newly added submersible liquid level sensor has a range of 0-3m and sends monitoring and display signals. This is 2.38m higher than the range of the original float-type liquid level sensor (0-0.62m). Even if the liquid level on the top cover exceeds the upper limit of the float-type liquid level sensor, the monitoring system can still accurately record the liquid level on the top cover.

[0123] ④ Improved visibility of top cover liquid level, allowing on-site operation to see the actual liquid level: In this optimization, we added two digital displays to the panel of the top cover drainage control cabinet, which can display the real height of the top cover liquid level in real time. Even when the drainage pump is switched to manual operation, the operating status of the drainage pump can be adjusted according to the liquid level displayed on the digital displays, thereby reducing the risk of the drainage pump burning out due to excessively low liquid level.

[0124] This embodiment uses four levels of liquid level sensors fixed on the top cover: an over-high alarm level, an emergency pump start level, a standby pump start level, a main pump start level, and a normally open / stop pump level, which are located far away from the top cover. The water level is raised from low to high and passes through these levels in sequence, generating corresponding liquid level signals. This application strictly follows steps S1 to S8 to ensure that adjacent liquid levels can verify and self-check each other. If a signal is generated for a level that exceeds the required level (e.g., a third signal is generated at the next lower level than the second signal), it indicates that the liquid level sensing component of this application has malfunctioned. Compared to the existing single float, this application activates different pumps at different liquid levels and shuts down the turbine generator set when the water level reaches the over-high alarm level. This avoids the problem of a single float being locked by sediment, causing the drainage pump to fail to start and stop automatically, which in turn leads to unplanned shutdown of the turbine generator set.

[0125] like Figure 3 As shown in the figure, this embodiment provides a control device for a roof drainage system. The control device for the roof drainage system is applied to the control method of the roof drainage system in the above embodiment. The control device includes a signal acquisition and judgment first module 1, a main pump start module 2, a signal acquisition and judgment second module 3, a standby pump start module 4, a signal acquisition and judgment third module 5, an emergency pump start module 6, a signal acquisition and judgment fourth module 7, and a water turbine generator set shutdown module 8, which are connected in sequence.

[0126] The system comprises the following modules: First module 1 for signal acquisition and judgment, used to determine whether a second signal is generated for the main pump level in response to the disappearance of the first signal for the normally open pump stop level; Main pump start module 2, used to start the main pump in the drainage pump according to the second signal if the main pump level generates a second signal; Second module 3 for signal acquisition and judgment, used to determine whether a third signal is generated for the standby pump level; Standby pump start module 4, used to start the standby pump in the drainage pump according to the third signal if the standby pump level generates a third signal; Third module 5 for signal acquisition and judgment, used to determine whether a fourth signal is generated for the emergency pump level; Emergency pump start module 6, used to start the emergency pump in the drainage pump according to the fourth signal if the emergency pump level generates a fourth signal; Fourth module 7 for signal acquisition and judgment, used to determine whether a fifth signal is generated for the excessively high alarm level; and Hydro-generator unit shutdown module 8, used to shut down the hydro-generator unit according to the fifth signal if the excessively high alarm level generates a fifth signal.

[0127] Furthermore, the control device for the top cover drainage system also includes a liquid level acquisition module electrically connected to the main pump start module, and a liquid level judgment module, a signal generation module, and a signal execution module electrically connected in sequence to the liquid level acquisition module.

[0128] The liquid level acquisition module is used to acquire the liquid level sensed by the first float sensor and use it as the main signal liquid level; the liquid level judgment module is used to determine whether the main signal liquid level is greater than the main pump start liquid level and less than the standby pump start liquid level; the signal generation module is used to generate a main pump start signal based on the current main signal liquid level if the main signal liquid level is greater than the main pump start liquid level and less than the standby pump start liquid level; the signal execution module is used to ignore the second signal and start the main pump based on the main pump start signal.

[0129] Furthermore, the liquid level judgment module is also used to determine whether the main signal liquid level is greater than the standby pump liquid level and less than the emergency pump liquid level; the signal generation module is also used to generate a standby pump signal based on the current main signal liquid level if the main signal liquid level is greater than the standby pump liquid level and less than the emergency pump liquid level; the signal execution module is also used to ignore the third signal and start the standby pump based on the standby pump signal.

[0130] Furthermore, the liquid level judgment module is also used to determine whether the main signal liquid level is greater than the emergency pump start liquid level and less than the over-high alarm liquid level; the signal generation module is also used to generate an emergency pump start signal based on the current main signal liquid level if the main signal liquid level is greater than the emergency pump start liquid level and less than the over-high alarm liquid level; the signal execution module is also used to ignore the fourth signal and start the emergency pump based on the emergency pump start signal.

[0131] Furthermore, the liquid level judgment module is also used to determine whether the main signal liquid level is greater than the over-high alarm liquid level; the signal generation module is also used to generate a shutdown signal based on the current main signal liquid level if the main signal liquid level is greater than the over-high alarm liquid level; the signal execution module is also used to ignore the fifth signal and shut down the hydro-generator unit based on the shutdown signal.

[0132] Furthermore, the liquid level acquisition module is also used to acquire the liquid level sensed by the second float sensor and use it as the secondary signal liquid level; the liquid level judgment module is also used to judge whether the height difference between the secondary signal liquid level and the main signal liquid level is less than a preset threshold; the signal execution module is also used to ignore the main signal liquid level and execute the signal acquisition and judgment first module, the main pump start module, the signal acquisition and judgment second module, the standby pump start module, the signal acquisition and judgment third module, the emergency pump start module, the signal acquisition and judgment fourth module, and the turbine generator set shutdown module in sequence if the height difference between the secondary signal liquid level and the main signal liquid level is not less than the preset threshold.

[0133] Furthermore, the liquid level judgment module is also used to determine whether the main signal liquid level and the auxiliary signal liquid level exceed the preset range; the signal execution module is also used to ignore the main signal liquid level and execute the signal acquisition and judgment first module, the main pump start module, the signal acquisition and judgment second module, the standby pump start module, the signal acquisition and judgment third module, the emergency pump start module, the signal acquisition and judgment fourth module, and the hydro-generator unit shutdown module in sequence if at least one of the main signal liquid level and the auxiliary signal liquid level exceeds the preset range.

[0134] It should be noted that this embodiment is a device embodiment based on the above method embodiment. For the extensions, optimizations, limitations and practical operations of the above method embodiment, this device embodiment will not repeat them. For the relevant extensions, optimizations, limitations and practical operations, please refer to the above method embodiment.

[0135] This embodiment uses four levels of liquid level sensors fixed on the top cover: an over-high alarm level, an emergency pump start level, a standby pump start level, a main pump start level, and a normally open / stop pump level, which are located far away from the top cover. The water level is raised from low to high and passes through these levels in sequence, generating corresponding liquid level signals. This application strictly follows steps S1 to S8 to ensure that adjacent liquid levels can verify and self-check each other. If a signal is generated for a level that exceeds the required level (e.g., a third signal is generated at the next lower level than the second signal), it indicates that the liquid level sensing component of this application has malfunctioned. Compared to the existing single float, this application activates different pumps at different liquid levels and shuts down the turbine generator set when the water level reaches the over-high alarm level. This avoids the problem of a single float being locked by sediment, causing the drainage pump to fail to start and stop automatically, which in turn leads to unplanned shutdown of the turbine generator set.

[0136] Figure 4 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Figure 3 As shown, the electronic device 9 includes a processor 91 and a memory 92 coupled to the processor 91.

[0137] The memory 92 stores program instructions for implementing a fault detection method for an oil-immersed transformer according to any of the above embodiments.

[0138] The processor 91 is used to execute program instructions stored in the memory 92 to perform fault detection of the oil-immersed transformer.

[0139] The processor 91 can also be referred to as a CPU (Central Processing Unit). The processor 91 may be an integrated circuit chip with signal processing capabilities. The processor 91 can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor can be a microprocessor or any conventional processor.

[0140] Furthermore, Figure 5 This is a schematic diagram of the structure of a storage medium according to an embodiment of this application. See also: Figure 4 The storage medium 10 in this embodiment stores program instructions 101 capable of implementing all the above methods. These program instructions 101 can be stored in the storage medium as a software product, including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods in each embodiment of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, or terminal devices such as computers, servers, mobile phones, and tablets.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0142] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units. The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the description and drawings of this application, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control method for a top cover drainage system, wherein the top cover drainage system is applied to the drainage pump of a hydro-generator unit, characterized in that, The top cover drainage system includes a liquid level sensing component fixedly installed on the side of the top cover of the hydro-generator unit adjacent to the water body below it. The liquid level sensing component includes, in sequence, high alarm liquid level, emergency pump start liquid level, standby pump start liquid level, main pump start liquid level, and normally open / stop pump liquid level, all moving away from the top cover. The control method includes: Step S1: In response to the disappearance of the first signal of the normally open pump stop level, determine whether the main pump start level generates a second signal; Step S2: If the main pump level generates the second signal, then the main pump in the drain pump is started according to the second signal; Step S3: Determine whether the standby pump level generates a third signal; Step S4: If the standby pump level generates the third signal, then the standby pump in the drainage pump is started according to the third signal. Step S5: Determine whether the emergency pump level has generated a fourth signal; Step S6: If the emergency pump level generates the fourth signal, then the emergency pump in the drain pump is activated according to the fourth signal. Step S7: Determine whether the excessively high alarm liquid level generates a fifth signal; Step S8: If the excessively high alarm liquid level generates the fifth signal, then the hydro-generator unit is shut down according to the fifth signal; The liquid level sensing assembly further includes a first float sensor fixedly mounted on the inner wall of the top cover. The first float sensor is located below the normally open / stopped pump liquid level. After step S2, the following is included: The sensed liquid level of the first float sensor is obtained and used as the main signal liquid level; Determine whether the main signal liquid level is greater than the main pump start liquid level and less than the standby pump start liquid level; If so, then generate a main pump start signal based on the current main signal liquid level; Ignore the second signal and start the main pump according to the main pump start signal; After acquiring the sensed liquid level of the first float sensor and using it as the main signal liquid level, the process includes: Determine whether the main signal liquid level is greater than the standby pump liquid level and less than the emergency pump liquid level; If so, then generate a start-up pump signal based on the current master signal level; Ignore the third signal and start the standby pump according to the standby pump start signal; After acquiring the sensed liquid level of the first float sensor and using it as the main signal liquid level, the process includes: Determine whether the main signal liquid level is greater than the emergency pump start liquid level and less than the over-high alarm liquid level; If so, an emergency pump start signal will be generated based on the current master signal level. Ignore the fourth signal and start the emergency pump according to the emergency pump start signal; After acquiring the sensed liquid level of the first float sensor and using it as the main signal liquid level, the process includes: Determine whether the main signal liquid level is greater than the over-high alarm liquid level; If so, a shutdown signal is generated based on the current master signal level; Ignore the fifth signal and shut down the hydro-generator unit according to the shutdown signal.

2. The control method according to claim 1, characterized in that, The liquid level sensing assembly further includes a second float sensor fixedly mounted on the inner wall of the top cover. The second float sensor is located at the same height as the first float sensor and is spaced at a preset distance from the first float sensor. After acquiring the liquid level sensed by the first float sensor and using it as the main signal liquid level, the assembly includes: The sensed liquid level of the second float sensor is obtained and used as the secondary signal liquid level; Determine whether the height difference between the secondary signal liquid level and the primary signal liquid level is less than a preset threshold. If not, ignore the main signal level and proceed with steps S1 to S8.

3. The control method according to claim 2, characterized in that, After acquiring the sensed liquid level of the second float sensor and using it as the secondary signal liquid level, the process includes: Determine whether the main signal liquid level and the secondary signal liquid level exceed the preset range; If at least one of the main signal liquid level and the secondary signal liquid level exceeds the preset range, then the main signal liquid level is ignored and steps S1 to S8 are executed.

4. A control device for a roof drainage system, wherein the control device for the roof drainage system is applied to the control method for the roof drainage system as described in any one of claims 1 to 3, characterized in that, The control device for the top cover drainage system includes: The first module for signal acquisition and judgment is used to determine whether the second signal for the main pump start-up level is generated in response to the disappearance of the first signal of the normally open pump stop level. The main pump start module is used to start the main pump in the drain pump according to the second signal if the main pump level generates the second signal. The signal acquisition and judgment second module is used to determine whether the standby pump liquid level generates a third signal; A standby pump activation module is used to activate the standby pump in the drainage pump according to the third signal generated by the standby pump level. The third module for signal acquisition and judgment is used to determine whether the emergency pump level generates a fourth signal. An emergency pump activation module is used to activate the emergency pump in the drainage pump according to the fourth signal generated by the emergency pump level. The fourth module for signal acquisition and judgment is used to determine whether the excessively high alarm liquid level generates a fifth signal. The hydro-generator unit shutdown module is used to shut down the hydro-generator unit according to the fifth signal generated by the excessively high alarm liquid level.

5. An electronic device, characterized in that, The system includes a processor and a memory coupled to the processor, the memory storing program instructions executable by the processor; when the processor executes the program instructions stored in the memory, it implements a control method for a roof drainage system as described in any one of claims 1 to 3.

6. A storage medium, characterized in that, The storage medium stores program instructions, which, when executed by a processor, implement a control method for a top cover drainage system as described in any one of claims 1 to 3.

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