Method for uninterrupted operation control of water power station drainage control system during reconstruction
By setting up temporary control boxes and remote monitoring systems during the renovation of the hydropower station's drainage control system, dual redundancy control was achieved, solving the problem of uninterrupted operation during the renovation, ensuring the automation and safety of the hydropower station's drainage system, and reducing construction costs and risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA YANGTZE POWER
- Filing Date
- 2026-03-23
- Publication Date
- 2026-07-10
AI Technical Summary
During the renovation of the hydropower station's drainage control system, how to ensure the system operates continuously and avoid the serious consequences of flooding the powerhouse, especially in the absence of emergency drainage pipelines, is a challenge. Existing technologies have problems such as small drainage capacity of temporary water pumps, high labor costs, high safety risks, and difficulty in re-laying cables.
A mobile temporary control box was built, and a remote monitoring system was set up to achieve dual redundancy control. The start-stop priorities were set according to different water level thresholds through the temporary control box, the old control system and the remote monitoring system to form a dual redundancy backup control. The old control cabinet was removed in situ and a new control system was installed. The existing cables and pipelines were used to ensure uninterrupted operation of the automated control.
It enables uninterrupted drainage during the renovation period, reduces construction safety risks and costs, improves the degree of automation, is suitable for hydropower stations without emergency drainage pipelines, eliminates the risk of flooding the plant, and reduces labor input.
Smart Images
Figure CN122363019A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water supply and drainage technology, specifically to a method for uninterrupted operation control during the renovation of a hydropower station drainage control system. Background Technology
[0002] In hydroelectric power stations, seepage water from the dam and powerhouse walls collects in seepage sump pits via drainage ditches. The drainage control system collects water level signals from these pits and controls the start and stop of deep well pumps according to a set water level, maintaining the water level within a certain range. It typically consists of one control cabinet and several power cabinets. The drainage control system cannot be shut down; otherwise, the water level in the sump pits will continue to rise, eventually flooding the powerhouse. Over time, the drainage control system inevitably faces issues such as equipment aging, spare parts outages, and increased defect rates, necessitating upgrades and renovations. Ensuring uninterrupted system operation during the renovation process and preventing powerhouse flooding is of paramount importance in the project.
[0003] When there is a small amount of seepage in the sump and an emergency drainage pipeline is available, a temporary water pump can be placed in the sump for drainage. Then, the old control panel can be removed and a new control panel installed. Most sumps are generally located at lower elevations of the power plant or dam. Due to cost considerations, emergency drainage pipelines are generally not available during the construction of hydropower stations. Alternatively, a new control panel can be installed at a new site, and the deep well pumps can be connected to the new system in batches. This approach has the following drawbacks: 1) The temporary water pump has a small drainage capacity and is only suitable for power plants with emergency drainage pipelines. The removal of the old control panel, the installation of the new control panel, and the completion of system commissioning require time. The temporary water pump does not have automatic start / stop functionality and requires dedicated personnel to monitor the sump water level to control the pump's start / stop, resulting in high labor costs. Furthermore, to ensure the new system is put into use as quickly as possible, continuous shift work is often employed, increasing safety risks. 2) The temporary water pump lacks a matching soft starter for control and protection. In extreme cases, damage may occur, leading to pump-less drainage and flooding of the power plant. 3) The 400V power supply point is often far away from the control panel and not at the same elevation. Relocating and installing the control panel and then connecting the deep well pump in batches will make it impossible to use the old power cable. Most of the existing wall-penetrating pipes have been occupied, and the construction of re-laying the cable is difficult and costly. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a method for uninterrupted operation control during the renovation of a hydropower station drainage control system, aiming to solve how the system can achieve uninterrupted operation during the renovation of the drainage control system and avoid the serious consequences of flooding the power plant.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The uninterrupted operation control method during the renovation of the hydropower station drainage control system includes the following steps: Establish a transitional drainage control system: Prepare a movable temporary control box, connect the water level signal from the sump to the temporary control box, disconnect the control signals of some deep well pump power cabinets from the old control system and transfer them to the temporary control box, forming a transitional control loop independently controlled by the temporary control box, so as to achieve automatic control of the sump water level and deep well pump without affecting the operation of the existing drainage system; set up a remote monitoring system, which receives water level sensor data and communicates with the temporary control box. Debugging dual redundancy control: Set start-stop priorities for the temporary drainage control box, the old control system, and the remote monitoring system according to different water level thresholds to form dual redundancy backup control; In-situ modification and installation: Without altering the original power cables and wall-penetrating pipes, the old control cabinet and corresponding power cabinet are removed in the original location, and the new control system and new power cabinet are installed in the original location. The new system is officially put into operation: After the new control system is running stably, the temporary control box and the remaining old power cabinets are removed, and all power cabinets are connected to the new control system to complete the transformation.
[0006] The aforementioned temporary drainage control box contains a small PLC, power module, air switch, relay and touch screen. The PLC collects water level signals and automatically controls the start and stop of the deep well pump, while the touch screen displays the water level of the collection well and the operating status of the equipment in real time.
[0007] The water level signal of the sump well connected to the temporary control box is provided by the newly installed water level sensor. At least three sets of water level sensors are used in a 3-to-2 redundancy configuration. The water level signal is simultaneously connected to the temporary control box and the remote monitoring system to ensure reliable water level detection.
[0008] After the aforementioned transitional control system is completed, the temporary control box independently controls the first set of power cabinets, while the old control system continues to control the second set of power cabinets. The two sets of power cabinets drive their respective deep well pumps, and the drainage is carried out in parallel without interfering with each other.
[0009] The above-mentioned dual redundancy control logic is as follows: When the water level at the start-up pump of the transitional control system is lower than that of the old control system, drainage is prioritized. When the water level rises abnormally, the old control system automatically activates the second set of power cabinets to drain water as the first redundancy. When the water level at the start of the pump in the remote monitoring system is higher than that in the transition control system, it is connected in parallel to the soft starter via terminals as a second layer of redundancy.
[0010] The aforementioned temporary control box executes a standardized control procedure: water level reaches pump start-up setpoint → lubricating water is added → flow indicator signal is received with delay → deep well pump is started → water level reaches pump stop-down setpoint → deep well pump is stopped → lubricating water is withdrawn.
[0011] The above-mentioned modification process does not involve disassembling the deep well pump body, removing or installing the power cable at the pump end, or moving the pump installation position; it only involves switching the control signal line between the control cabinet and the power cabinet.
[0012] Throughout the entire renovation process, the deep well pumps never stopped operating. At any given time, at least one power cabinet and its corresponding deep well pump were in automatic control mode, ensuring uninterrupted drainage.
[0013] After the new control system is installed and commissioned, it will prioritize controlling the first group of power cabinets, while the transition control system will continue to control the second group of power cabinets as a backup redundancy, and the monitoring system will maintain ultimate redundancy.
[0014] When the new control system is officially put into operation, the second set of power cabinets, which were originally driven by the temporary control box, will be replaced with new power cabinets and connected to the new control system, so as to realize the unified control of all power cabinets by the new control system.
[0015] The aforementioned temporary control box is connected to the power cabinet via a soft starter. The soft starter receives control signals and performs pump start-up and pump stop operations, while also providing electrical protection for the deep well pump.
[0016] All the control cabinets and power cabinets mentioned above are installed and replaced in their original locations without adding cables, re-laying pipelines, or altering the on-site civil engineering and pipeline structure.
[0017] The uninterrupted operation control method for the renovation of a hydropower station drainage control system mentioned in this invention has the following beneficial effects: 1. Uninterrupted operation: Dual redundancy control ensures continuous pump operation and uninterrupted drainage throughout the entire process, completely eliminating the risk of flooding the factory.
[0018] 2. Safe and efficient construction: Only the control signal line is switched, without disassembling the pump body or moving the power cable, reducing operational risks.
[0019] 3. Significantly reduced costs: In-situ renovation and utilization of existing pipelines and cables save a lot of cable laying and civil construction.
[0020] 4. High degree of automation: The entire process is automatically controlled, requiring no dedicated personnel to operate, thus reducing manual labor input.
[0021] 5. High versatility: Applicable to the renovation of drainage systems in various hydropower station collection wells where there are no emergency drainage pipes or large seepage volumes. Attached Figure Description
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a diagram of the modified control structure of the drainage control system of the present invention; Figure 2 This is a diagram of the modified control structure of the drainage control system of the present invention; Figure 3 This is a diagram showing the dual-redundancy control structure of the new control system of this invention before and after its commissioning. Detailed Implementation
[0023] To better understand the purpose, system architecture, and functional implementation of this embodiment, the embodiments and features in the embodiments of this application can be combined with each other without conflict. The exemplary embodiments disclosed in this application will be described below with reference to the accompanying drawings, which include specific technical details disclosed in this embodiment to aid understanding; however, these details should be considered exemplary rather than restrictive. Therefore, those skilled in the art should understand that various improvements and adjustments can be made to the embodiments described herein without departing from the scope and core ideas of the invention. Similarly, for clarity, detailed descriptions of well-known technologies, functions, and structures (such as standard image processing algorithms and common communication protocols) are omitted in the following description.
[0024] The uninterrupted operation control method during the renovation of the hydropower station drainage control system includes the following steps: Establish a transitional drainage control system: Prepare a movable temporary control box, connect the water level signal from the sump to the temporary control box, disconnect the control signals of some deep well pump power cabinets from the old control system and transfer them to the temporary control box, forming a transitional control loop independently controlled by the temporary control box, so as to achieve automatic control of the sump water level and deep well pump without affecting the operation of the existing drainage system; set up a remote monitoring system, which receives water level sensor data and communicates with the temporary control box. Debugging dual redundancy control: Set start-stop priorities for the temporary drainage control box, the old control system, and the remote monitoring system according to different water level thresholds to form dual redundancy backup control; In-situ modification and installation: Without altering the original power cables and wall-penetrating pipes, the old control cabinet and corresponding power cabinet are removed in the original location, and the new control system and new power cabinet are installed in the original location. The new system is officially put into operation: After the new control system is running stably, the temporary control box and the remaining old power cabinets are removed, and all power cabinets are connected to the new control system to complete the transformation.
[0025] The aforementioned temporary drainage control box contains a small PLC, power module, air switch, relay and touch screen. The PLC collects water level signals and automatically controls the start and stop of the deep well pump, while the touch screen displays the water level of the collection well and the operating status of the equipment in real time.
[0026] The water level signal of the sump well connected to the temporary control box is provided by the newly installed water level sensor. At least three sets of water level sensors are used in a 2-out-of-3 redundant configuration. The water level signal is simultaneously connected to the temporary control box and the remote monitoring system to ensure reliable water level detection.
[0027] After the aforementioned transitional control system is completed, the temporary control box independently controls the first set of power cabinets, while the old control system continues to control the second set of power cabinets. The two sets of power cabinets drive their respective deep well pumps, and the drainage is carried out in parallel without interfering with each other.
[0028] The above-mentioned dual redundancy control logic is as follows: When the water level at the start-up pump of the transitional control system is lower than that of the old control system, drainage is prioritized. When the water level rises abnormally, the old control system automatically activates the second set of power cabinets to drain water as the first redundancy. When the water level at the start of the pump in the remote monitoring system is higher than that in the transition control system, it is connected in parallel to the soft starter via terminals as a second layer of redundancy.
[0029] The aforementioned temporary control box executes a standardized control procedure: water level reaches pump start-up setpoint → lubricating water is added → flow indicator signal is received with delay → deep well pump is started → water level reaches pump stop-down setpoint → deep well pump is stopped → lubricating water is withdrawn.
[0030] The above-mentioned modification process does not involve disassembling the deep well pump body, removing or installing the power cable at the pump end, or moving the pump installation position; it only involves switching the control signal line between the control cabinet and the power cabinet.
[0031] Throughout the entire renovation process, the deep well pumps never stopped operating. At any given time, at least one power cabinet and its corresponding deep well pump were in automatic control mode, ensuring uninterrupted drainage.
[0032] After the new control system is installed and commissioned, it will prioritize controlling the first group of power cabinets, while the transition control system will continue to control the second group of power cabinets as a backup redundancy, and the monitoring system will maintain ultimate redundancy.
[0033] When the new control system is officially put into operation, the second set of power cabinets, which were originally driven by the temporary control box, will be replaced with new power cabinets and connected to the new control system, so as to realize the unified control of all power cabinets by the new control system.
[0034] The aforementioned temporary control box is connected to the power cabinet via a soft starter. The soft starter receives control signals and performs pump start-up and pump stop operations, while also providing electrical protection for the deep well pump.
[0035] All the control cabinets and power cabinets mentioned above are installed and replaced in their original locations without adding cables, re-laying pipelines, or altering the on-site civil engineering and pipeline structure.
[0036] Example 1: The technical solution of this embodiment includes the following: Step 1: Construction of the Transitional Control System. First, a movable temporary drainage control box is constructed. Inside the box, a small PLC, power module, air switch, and relays are installed, with a touchscreen mounted on the door. The PLC collects input signals and executes output control according to the set program. The power module converts AC220V power to DC24V to power the components. The air switch and relays control the circuit. The touchscreen displays real-time information such as the water level in the sump and the status of the deep well pump. The temporary control box collects the water level signal from the sump. When the water level reaches the set start signal for the main pump, it energizes the solenoid valve to release lubricating water. Upon receiving the lubricating water flow signal, a delay is initiated. After the delay, a start command is sent to the soft starter of the main pump power cabinet, which controls the deep well pump to start drainage. When the pump stop level is reached, the temporary control box sends a stop command to the soft starter, simultaneously de-energizing the solenoid valve to release lubricating water. The soft starter then stops the deep well pump, completing one drainage cycle. Three new water level sensors were installed in the sump, employing a redundancy design of two out of three to ensure the accuracy of the water level signals. These signals were then connected to a temporary control box. The signals between power cabinets #3 and #4 and the old control cabinet were disconnected, separating them from the old control system before connecting them to the temporary control box. Figure 1 As shown. The transition system using a temporary control box to control the old power cabinet has a short construction period and low difficulty, allowing the transition system to be put into operation more quickly. Before the transition control system is put into operation, the old control system still controls the remaining power cabinets to automatically start and stop the deep well pump for drainage.
[0037] Step Two: Transitional Control System Debugging. After the transitional system is built, it is debugged to simulate changes in the water level of the sump well until the transitional system can automatically control the start and stop of the deep well pump. Then, the pump start-up water level in the temporary control box is set below the original control system's start-up setpoint, allowing the transitional control system to prioritize drainage during trial operation. For example, if the original control system's start-up setpoint is 38 meters, the transitional control system's start-up water level is modified to 37.5 meters. If the transitional control system malfunctions and cannot start the pump for drainage, when the water level rises to the original control system's start-up setpoint of 38 meters, the original control system will control power cabinets #1 and #2 to start the pump for drainage. In this case, the original control system acts as a backup redundant control for the transitional control system. After the transitional control system's trial operation and drainage are completed, the start-up water level is modified back to the original start-up setpoint, as shown in the example above, which is 38 meters. The monitoring system incorporates pump start / stop functionality. Start / stop commands are sent in parallel to the soft starter via the transition control system terminals. The start-up water level setpoint is 0.5 meters higher than the transition control system's start-up water level setpoint. Specifically, the monitoring system sends a start-up command to the soft starter when the water level in the sump reaches 38.5 meters, and a stop-stop command to the soft starter when the water level reaches the stop-stop level. In this case, the monitoring system acts as a backup redundant control for the transition control system. This dual redundancy control ensures uninterrupted operation of the drainage system, effectively reducing the risk of flooding the plant. The structure is as follows: Figure 2 As shown.
[0038] Step 3: Dismantling of the original control system and installation of the new control system. After the transitional control system is put into operation, the control cabinet, power cabinet #1, power cabinet #2, and related local components of the original control system will be dismantled, and the new control cabinet, power cabinet, and local components will be installed in their original positions.
[0039] Step 4: Debugging and Trial Operation of the New Control System. After installation, power is supplied for testing of automatic start / stop, manual start / stop, and fault alarm functions. After debugging, the pump start-up water level setpoint of the new control system is set to 0.5 meters below the pump start-up water level of the transition control system, i.e., 37.5 meters. This allows the new control system to prioritize drainage during trial operation. If the new control system malfunctions and cannot start pumping, when the water level rises to the transition control system's pump start-up setpoint of 38 meters, the transition control system will control power cabinets #3 and #4 to start pumping. In this case, the transition control system serves as a backup redundancy control for the new control system. After the new control system's trial operation and drainage are completed, the pump start-up water level is modified back to the original pump start-up setpoint of 38 meters. After disconnecting the original start / stop pump commands from the transitional control system terminals, connect them to power cabinets #1 and #2. The start-up water level setpoint is 0.5 meters higher than the new control system's start-up water level setpoint. Specifically, the monitoring system sends a start command to the soft starter when the water level in the sump reaches 38.5 meters, and a stop command to the soft starter when the water level reaches the stop level. In this case, the monitoring system acts as a backup redundant control for the new control system, with the structure as follows: Figure 3 As shown.
[0040] Step 5: Commissioning of the new control system. After the trial operation and drainage of the new control system are completed, remove power cabinets #3 and #4 and the temporary control box. Install new power cabinets #3 and #4 in their original positions and connect them to the new control system. Add a monitoring system to the remote automatic start / stop signals of power cabinets #3 and #4, and improve the backup redundancy control function of the monitoring system. Then, conduct overall commissioning and put it into operation. The overall construction process is attached. Figure 1 As shown.
[0041] Using the control method of this invention, the following can be achieved for deep well pumps: 1. Throughout the entire renovation process, the deep well pump body is not disassembled, the power cable is not disconnected, and the pump body is not shut down.
[0042] 2. Only disconnect / connect the control signal line, do not disconnect the pump body power supply cable.
[0043] 3. At any given time, at least one system is automatically controlling drainage, with no risk of control failure, pump stoppage, or flooding.
[0044] During each stage of the renovation, the controlled object and its electrical connection relationship, i.e., which system is controlled by the original / transitional / new system respectively, are as follows: 1. Initial state (before modification) The old control system controls all power cabinets #1, #2, #3, and #4, which in turn control the deep well pumps. Pump body cable → directly connect to power cabinet, without moving at all.
[0045] 2. Transitional Control System Setup Phase Do only one thing: Decommission the old control cabinet Control signals for power cabinets #3 and #4; The control signal lines of power cabinets #3 and #4 were rerouted to the temporary control box; Power cabinets #1 and #2 are still controlled by the old control system; The pump body, power cable, and wiring remain completely untouched.
[0046] 3. During the transition period Transition system (temporary box): controls power cabinets #3 and #4; Old control system: Controlled power cabinets #1 and #2; Monitoring system: Connected in parallel to all soft starters as ultimate redundancy; The two control systems operate in parallel without interfering with each other.
[0047] 4. New system installation and trial operation phase The old control cabinet and power cabinets #1 and #2 were removed from their original locations. New control cabinets and new power cabinets #1 and #2 were installed. The new system will first control power cabinets #1 and #2; The transition system still controls power cabinets #3 and #4 as redundancy for the new system.
[0048] 5. The new system is officially put into operation. Remove the temporary control box; Demolish the old power cabinets #3 and #4; New power cabinets #3 and #4 were installed and all connected to the new control system; The new system provides unified control over all power cabinets and pumps.
[0049] During the renovation process, the pump body was not disassembled, moved, or dismantled at all. Only the control circuit, control cabinet, and power cabinet were modified. The deep well pump, pump body, and installation foundation were not disassembled or reassembled at all. For the cables, only the control signal line was moved, and the power cable (the main power supply to the pump) was not moved. The power cable was not removed, replaced, or re-laid at all. The control signal line was only disconnected and rerouted between cabinets. The pump end cable was not involved and was installed in its original position without penetrating walls, drilling pipes, or adding new cables.
[0050] For deep well pumps, a transition system is first built, and then the old system is dismantled. The old control cabinet is only removed after the transition system is operating normally, ensuring that the pump is always under control. Furthermore, a dual-redundancy water level logic is employed: the transition system prioritizes drainage, and the old system automatically takes over in case of an anomaly. If another anomaly occurs, the monitoring system remotely forces the pump to start, ensuring that the pump will not stop due to any single fault.
[0051] This system adopts a phased commissioning approach, with no system-wide power outages. Pumps in power cabinets #1 and #2, as well as #3 and #4, are always running. Furthermore, the system is automatically controlled, requiring no manual intervention, and operates automatically throughout the entire process, ensuring no pump-free operation occurs.
Claims
1. A method for uninterrupted operation control during the renovation of a hydropower station's drainage control system, characterized in that: Includes the following steps: Establish a transitional drainage control system: Prepare a movable temporary control box, connect the water level signal from the sump to the temporary control box, disconnect the control signals of some deep well pump power cabinets from the old control system and transfer them to the temporary control box, forming a transitional control loop independently controlled by the temporary control box, so as to achieve automatic control of the sump water level and deep well pump without affecting the operation of the existing drainage system; set up a remote monitoring system, which receives water level sensor data and communicates with the temporary control box. Debugging dual redundancy control: Set start-stop priorities for the temporary drainage control box, the old control system, and the remote monitoring system according to different water level thresholds to form dual redundancy backup control; In-situ modification and installation: Without altering the original power cables and wall-penetrating pipes, the old control cabinet and corresponding power cabinet are removed in the original location, and the new control system and new power cabinet are installed in the original location. The new system is officially put into operation: After the new control system is running stably, the temporary control box and the remaining old power cabinets are removed, and all power cabinets are connected to the new control system to complete the transformation.
2. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, The temporary drainage control box contains a small PLC, power module, air switch, relay and touch screen. The PLC collects water level signals and automatically controls the start and stop of the deep well pump. The touch screen displays the water level of the collection well and the operating status of the equipment in real time.
3. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, The water level signal of the sump well connected to the temporary control box is provided by a newly installed water level sensor. At least three sets of water level sensors are used in a 3-to-2 redundancy configuration. The water level signal is simultaneously connected to the temporary control box and the remote monitoring system to ensure reliable water level detection.
4. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, After the transition control system is set up, the temporary control box independently controls the first set of power cabinets, while the old control system continues to control the second set of power cabinets. The two sets of power cabinets drive the corresponding deep well pumps respectively, and drain water in parallel without interfering with each other.
5. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, The aforementioned dual redundancy control logic is as follows: When the water level at the start-up pump of the transitional control system is lower than that of the old control system, drainage is prioritized. When the water level rises abnormally, the old control system automatically activates the second set of power cabinets to drain water as the first redundancy. When the water level at the start of the pump in the remote monitoring system is higher than that in the transition control system, it is connected in parallel to the soft starter via terminals as a second layer of redundancy.
6. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, The temporary control box executes a standardized control procedure: water level reaches pump start setpoint → lubricating water is added → flow indicator signal is received with delay → deep well pump is started → water level reaches pump stop setpoint → deep well pump is stopped → lubricating water is withdrawn.
7. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, The entire modification process does not involve disassembling the deep well pump body, removing or installing the power cable at the pump end, or moving the pump installation position; it only involves switching the control signal line between the control cabinet and the power cabinet.
8. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, Throughout the entire modification process, the deep well pump operates without interruption. At any given time, at least one power cabinet and its corresponding deep well pump are in automatic control mode, ensuring uninterrupted drainage.
9. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, After the new control system is installed and debugged, it will prioritize controlling the first group of power cabinets, while the transition control system will continue to control the second group of power cabinets as backup redundancy, and the monitoring system will maintain ultimate redundancy.
10. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, When the new control system is officially put into operation, the second set of power cabinets, which were originally driven by the temporary control box, will be replaced with new power cabinets and connected to the new control system, so as to realize the unified control of all power cabinets by the new control system.
11. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, The temporary control box is connected to the power cabinet via a soft starter. The soft starter receives control signals and performs pump start-up and pump stop operations, while also providing electrical protection for the deep well pump.
12. The uninterrupted operation control method during the renovation of the hydropower station drainage control system according to claim 1, characterized in that, All control cabinets and power cabinets are installed and replaced in their original locations without adding cables, re-laying pipelines, or altering the on-site civil engineering and pipeline structure.