Power station gate and water level automatic linkage control method and system

Abstract

The invention discloses a power station gate and water level automatic linkage control method and system, and relates to the technical field of intelligent control, and the method comprises the steps: collecting water level information data, processing water level signal data through three-out-of-average, and setting water level early warning; based on set water level early warning, the collected water level information is analyzed, and a power station dam control system is constructed; the power station dam is controlled based on the power station dam control system. According to the method, the change rate of the water level and the prediction trend are combined, the water regimen can be evaluated more comprehensively and more accurately, so that a more intelligent decision is made, the efficiency of daily operation is improved, and the capability of dealing with extreme weather events is greatly enhanced. The expandability of the system is enhanced through the modular design, the operation efficiency and safety of a single hydropower station are improved, a new thought and technical support are provided for intelligent management of the whole water conservancy system, and the sustainable utilization and management of water resources are greatly influenced.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and in particular to a method and system for automatically linking a power station gate and a water level. Background Art

[0002] As a clean and renewable energy source, hydropower plays an increasingly important role in the global energy structure. With the intensification of climate change and the frequent occurrence of extreme weather events, hydropower stations not only need to ensure power generation efficiency, but also need to play a greater role in flood control, peak load regulation, ecological protection, etc. At the same time, the increasing complexity of water resource management requires hydropower station control systems to have a higher level of intelligence and automation.

[0003] The cascade power stations in the Huoxi River Basin adopt an unmanned (less manned) and remote centralized control operation mode. The cascade power stations are connected end to end and distributed within a 40km basin. The water accumulation area is above 1,300m above sea level. It has a subtropical mountain climate and is located in a narrow valley in the mountains. It is prone to earthquakes, mountain torrents, mudslides and other natural disasters. The mudslides caused by floods often cause communication and power line interruptions and road obstructions, making it difficult for dam duty personnel to evacuate and power station support personnel to arrive in time. In order to prevent remote control failure due to dam communication failure, it is necessary to ensure that the dam gate can be automatically controlled in extreme cases of communication interruption, road severance, and no one left behind, to prevent the reservoir water level from exceeding the warning line or even overflowing the dam, and to further improve the dam's ability to resist extreme natural disasters. It is necessary to carry out intelligent transformation in accordance with higher "unmanned duty, emergency response" requirements. Summary of the invention

[0004] In view of the problems existing in the existing automatic linkage control method of power station gate and water level, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to ensure automatic control of the dam gates in extreme situations where communications are interrupted, roads are cut off, and no one is left behind, to prevent the reservoir water level from exceeding the warning line or even overflowing the dam, and further improve the dam's ability to resist extreme natural disasters.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In the first aspect, an embodiment of the present invention provides a method for automatic linkage control of a power station gate and water level, which includes collecting water level information data, processing water level signal data using three-average method, and setting water level warning; based on the set water level warning, analyzing the collected water level information and constructing a power station dam control system; and realizing control of the power station dam based on the power station dam control system.

[0008] As a preferred solution of the automatic linkage control method for the power station gate and water level of the present invention, wherein: the collection of the water level information data adopts the method of taking the average of three values, specifically: three radar water levels are set for measurement. When there is no abnormality in the three water level channels, the average of the two radar water levels is taken; when one water level channel has an abnormality; when the radar channel is normal, the average of the two radar water levels is still taken; when the radar channel is abnormal, another radar channel is used; when two water level channels have abnormalities, the normal channel is used; when all three water level channels have abnormalities, a sensor alarm is issued.

[0009] As a preferred solution of the automatic linkage control method for the power station gate and water level of the present invention, wherein: for the water level early warning, warning prompts are carried out by setting three-level water level gradient changes, including: if the water level rising rate in 1 hour > p cm / h and < q cm / h or the cumulative rise in 3 hours > n cm and < m cm, it is set as the first-level early warning: a yellow warning message is displayed on the HMI interface, a text message reminder is sent to the duty personnel, and the water level sampling frequency is increased to once every 3 minutes; the duty personnel need to record the water level data once every 1 hour, check the weather forecast, and evaluate the rainfall trend; if the water level rising rate in 1 hour > q cm / h and < d cm / h or the cumulative rise in 3 hours > m cm and < x cm or in a first-level warning state for 2 consecutive hours, it is set as the second-level early warning: an orange warning message is displayed and flashes on the HMI interface, text messages and phone notifications are sent to the duty personnel and management, the water level sampling frequency is increased to once every 1 minute, the flood control alarm is automatically started, and preparations are made to open the sand flushing gate, and the system enters the standby state; the duty personnel record the water level data once every 30 minutes, notify the relevant downstream units to make flood control preparations, and check the gate system; if the water level rising rate in 1 hour > d cm / h or the cumulative rise in 3 hours > x cm or in a second-level warning state for 1 consecutive hour or the water level exceeds the warning water level, it is set as the third-level early warning: a red warning message with a sound reminder is displayed on the HMI interface, an emergency notice is sent to all relevant personnel, the water level sampling frequency is increased to once every 30 seconds, the emergency flood control plan is automatically started, and if the water level continues to rise, the sand flushing gate and the flood discharge gate are automatically opened; the duty personnel continuously monitor the water level change, start the flood control emergency command system, and notify the downstream areas to make preparations for emergency evacuation.

[0010] As a preferred solution of the automatic linkage control method of the power station gate and water level described in the present invention, the power station dam control system includes a power station dam sand flushing gate unit, a 1# flood discharge gate winch-type hoist control unit, a 2# flood discharge gate winch-type hoist control unit, a 3# flood discharge gate winch-type hoist control unit and a power station dam LCU; the power station dam sand flushing gate, the 1# flood discharge gate winch-type hoist control unit, the 2# flood discharge gate winch-type hoist control unit, and the 3# flood discharge gate winch-type hoist control unit are connected to the power station dam LCU switch in a single-channel Ethernet mode to construct a power station dam. Dam control system; when monitoring the communication status of the dam control system, the dam LCU and the power station dam sand flushing gate, 1#~3# flood discharge gate winch hoist control unit add status monitoring of the communication site. When the gate dam LCU control handle is in the "remote / local" position, the gate linkage function is consistent with the LCU control mode "Chengdu, Baima, Muzuo / dam touch screen", and displays the communication status of each control unit with local SCADA, as well as the main and standby status of the network card of each gate control unit. The joint control can only be operated on the gate joint control when the gate dam LCU control handle is in the "remote" position.

[0011] As a preferred solution of the automatic linkage control method of the power station gate and water level of the present invention, the control of the power station dam includes: adding a gate linkage control function to the dam LCU, and realizing the automatic lifting and lowering of the gate through the gate linkage control, specifically including: each gate control unit controls the gate of the unit, and the "remote" operation mode is divided into single control and linkage control: when the control unit is "single control", the operator performs manual operation according to actual needs; when the communication is normal, the switching between single control and linkage control is performed by the operator, and when it is put into "linked control", it cannot be manually operated by the operator, and cannot be "remotely operated" The gate is not allowed to be put into or automatically exit the "joint control": including judging whether the power supply is normal, whether there is a signal to lock the gate opening and closing, and whether the communication with the LCU is normal; further, the single-hole gate is added to the joint control, the target water level tracks the actual water level value, remains unchanged, and the gate opening remains unchanged; when a single-hole gate is added to the joint control, the setting value mode of the gate will be automatically activated; the actual calculated water level value takes the radar water level as the priority: when there is no abnormality in the three water level channels, the average of the two radar water levels is taken; when an abnormality occurs in one water level channel; if there is no abnormality in the radar channel, the average of the two radar water levels is still taken; if the radar channel is abnormal, the other one is used. One radar channel; when two water level channels are abnormal, the channel without abnormality is used; when three water level channels are abnormal, a sensor alarm is issued and the joint control is exited; the joint control strategy is: when the set target value is changed to exceed the upper and lower warning values, the gate opening is allocated according to the priority principle. When the target water level is higher than the upper warning value, the gate single action opening is given priority to the gate with a smaller number, and it is accumulated one by one to the current gate opening upper limit value, and the remaining opening is automatically allocated to the next gate; when the target water level is lower than the lower warning value, the gate single action opening is given priority to the gate with a larger number, and it is gradually reduced to The current lower limit of the gate opening automatically allocates the remaining opening to the next gate hole; the gate joint control function uses the three-average strategy to obtain the calculated water level value based on the water level measurement value in front of the dam barrier, and uses this as the reservoir water level to jointly control the four gate control units, and the corresponding joint control process is implemented in the dam LCU; when the dam LCU communicates normally with the host computer system and the gate control unit, the joint control function is exited by the operating personnel; when the communication between the dam LCU and a certain gate control unit is interrupted, the joint control function of the gate of that hole is automatically exited; the control units participating in the gate joint control operation must be in the "remote" automatic control state.

[0012] As a preferred solution of the automatic linkage control method of the power station gate and water level described in the present invention, the joint control operation strategy of the LCU of the power station dam for the four sets of gates includes: each control unit sets the gate joint control operation flag of whether to participate in the water level control adjustment according to the gate control unit and the gate joint control function operation strategy; under the same conditions, the gate joint control operation priority is as follows: open the sand flushing gate first, and then open the flood discharge gate after the opening of the sand flushing gate reaches hm; the adjustment order of 1#~3# flood discharge gates is manually set with priority and automatic operation lock, "1" is the high priority, and the sand flushing gate is always "1" after being put into joint control, and the action opening of each gate hole is not Exceeds the full opening degree am; manually set the single opening degree of the control gate, the default is wm; for the gate participating in the joint control operation, if a fault occurs during the operation, the system automatically assigns the unfinished gate opening degree to the gate participating in the joint control operation in sequence to continue the operation until the gate opening degree meets the requirements. The maximum opening degree allowed for each gate is "full open" am; trigger conditions for starting the gate opening operation: if the upstream water level exceeds the control water level, determine whether there is a continuous net inflow by detecting whether the water level is continuously rising. If there is a continuous net inflow, open the gate in sequence; if the upstream water level exceeds the upper limit control water level, open it directly in sequence Gate; Opening operation of each gate: after the gate opening conditions are met, the corresponding opening is carried out according to the gate joint control operation command; the height of the first opening of the sand flushing gate is wm; Water level control opening operation: if the water level exceeds the warning value, open the sand flushing gate, and the opening height each time does not exceed the set gate switch opening; after the sand flushing gate is opened to tm opening, open a high-priority flood discharge gate in the order of priority, and so on; each opening is completed, wait for a control cycle to judge the water level fluctuation; when the upstream water level is between the upper limit control water level and the lower limit control water level, keep the current gate height unchanged; each gate is opened for the first time except when it is fully closed In addition, for other continued openings due to rising water levels, the opening amplitude should be adjusted each time according to the rising water level, but the maximum single opening amplitude shall not exceed im; gate closing operation: if the upstream water level drops to the lower control water level or below, close the flood discharge gates with lower priority one by one in sequence; for each closing operation, wait for a control cycle, if the upstream water level does not rise, continue to close the flood discharge gate; and so on, if the opening is not enough, close the second lowest priority gate in sequence; for subsequent time periods, adjust the height of the flood discharge gate according to the above rules, and the final drawdown water level will be maintained between the upper control water level and the lower control water level.

[0013] As a preferred solution of the automatic linkage control method of the power station gate and water level described in the present invention, the emergency operation and optimization processing of the power station dam gate include: adding a gate malfunction protection program, adding a program segment in the gate PLC, real-time monitoring of the gate status, when the gate local control system is in "remote" mode and no control command is received, if the gate opening or closing signal is actuated or the gate opening changes, the gate PLC program automatically issues a stop order; if the gate still does not stop or the gate opening or closing signal is actuated again within a unit time after stopping, the gate emergency stop circuit is automatically started to trip the circuit breaker with a shunt release; adding a rate limit alarm: in the gate local control system A rate-exceeding alarm program segment is added to the PLC to monitor the entire process of gate opening and closing in real time. When the gate opening feedback value change rate exceeds the rate setting range, an automatic alarm is triggered. The rate setting range needs to be measured according to the gate status. When the gate opening feedback value change rate is greater than the rate setting upper limit, it indicates that the opening feedback may be abnormal. When it is less than the rate setting lower limit, it indicates that the gate may be stuck or the hydraulic transmission mechanism is abnormal, and on-site inspection and processing are required. Add gate stopping criteria: During the gate lifting process, when the gate feedback opening value is greater than the gate given opening value, the gate will stop automatically. During the gate closing process, when the gate feedback opening value is less than the gate given opening value, the gate will stop automatically. And prevent the gate from rising and falling repeatedly near the set value.

[0014] In the second aspect, an embodiment of the present invention provides a power station gate and water level automatic linkage control system, which includes: a collection module, used to collect water level information data, use three-average processing water level signal data, and set water level warnings; a construction module, used to analyze the collected water level information according to the set water level warning, and construct a power station dam control system; a control module, used to control the power station dam according to the power station dam control system.

[0015] In a third aspect, an embodiment of the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, wherein: when the processor executes the computer program, any step of the above-mentioned method for automatic linkage control of power station gate and water level is implemented.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, any step of the above-mentioned method for automatic linkage control of a power station gate and a water level is implemented.

[0017] The beneficial effect of the present invention is that the present invention not only enhances the system's ability to cope with emergencies by introducing automated linkage control and optimized control strategies, but also reduces unnecessary equipment operations and extends the life of the equipment. By combining the rate of change of the water level with the predicted trend, the water situation can be assessed more comprehensively and accurately, thereby making more intelligent decisions, which not only improves the efficiency of daily operations, but also greatly enhances the ability to cope with extreme weather events such as heavy rains and floods. The modular design enhances the scalability of the system, making it easy to adapt to the needs of different hydropower stations. It not only improves the operating efficiency and safety of a single hydropower station, but also provides new ideas and technical support for the intelligent management of the entire water conservancy system, which has a profound impact on the sustainable utilization and management of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 It is a flow chart of the automatic linkage control method of the power station gate and water level;

[0020] Figure 2 This is the structural diagram of the power station dam control system;

[0021] Figure 3 This is the water level information structure diagram of the power station gate. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example 1

[0026] Reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, provides a method for automatically linking a power station gate with a water level, comprising:

[0027] S1: Collect water level information data, use three-way averaging to process water level signal data, and set water level warning.

[0028] The power station reservoir is an incomplete daily regulation reservoir with a small storage capacity. The water level is controlled at 1542.00m according to the inflow flow (inflow flow <133m 3 / s)、1541.00m(inflow flow 133~209m 3 / s), all units are shut down to restore natural river channels (inflow flow> 209m 3 / s), but the site does not have the conditions to accurately detect the inflow and outflow of the reservoir. It is not very realistic to predict the reservoir water level through the flow, prevent the water level from exceeding the limit, and avoid dam disasters. Based on the above reasons, according to the characteristics of the hydropower station reservoir and dam, the reservoir water level changes are first analyzed in combination with the historical data of the power station reservoir water level, and the water level alarm value and water level gradient alarm value of the power station reservoir are set to provide reference support for controlling the reservoir water level warning.

[0029] At present, there is one pressure water level gauge in front of the trash rack of the power station dam, and two pressure water level gauges behind the rack. Due to the limited installation position, the pressure water level gauge cannot measure the lower water level. In order to increase the accuracy and stability of water level measurement, two radar level gauges are added in front of the rack and one radar level gauge is added behind the rack. The water level gauges are connected to the dam LCU to collect water level information.

[0030] After adding radar water level gauges, there are 3 water level gauges before the gate (2 radars and 1 drop-type) and 3 water level gauges after the gate (1 radar and 2 drop-type), and the water level before the gate is used as the reservoir water level control target.

[0031] In the automatic control loop, the selection of analog quantity adopts the method of three averages, which can overcome the system error to a certain extent and is widely used in automatic control. The strategy of using the three averages method is as follows:

[0032] When all three signals are normal, take the average value of the two radar water level gauges; when one signal other than the radar water level gauge is abnormal, still take the average value of the radar water level gauges; when one radar water level gauge is abnormal, take the value of the other radar water level gauge; when two signals are abnormal, take the value of the normal water level gauge.

[0033] In order to increase the reliability of the water level signal, the water level signals collected by the above three water level meters are processed in the following way:

[0034] The AI ​​sampling point of LCU sets corresponding filtering, threshold value setting, fault-tolerant filtering and other parameters;

[0035] Validity of collected water levels: Validity of AI point sampling (IV / NT / OV);

[0036] Validity of measurements:

[0037] Whether the measured value is within the valid range: When it exceeds the measuring range, the water level measurement is reported as out of limit and an alarm is sounded.

[0038] When all water level meter sampling signal channels fail (delay 2s), or the effective water level value has not been updated for more than 10 minutes, a water level meter sampling failure alarm will be issued and joint control will be exited.

[0039] The installation position of the immersion water level meter is limited, and the measurement below the installation position cannot be achieved, that is, there is a measurement dead zone. To ensure the effectiveness of the measurement, the measurement range is 0.1m above the installation position.

[0040] When the difference deviation between two water level gauges in the same group (3) is too large, that is, the deviation exceeds 10% of the measuring range, the water level of this group will be invalidated and the "water level gauge deviation is too large alarm" will be reported.

[0041] Water level data were collected every 5 minutes, and the water level change rates were calculated for 10 minutes, 30 minutes, 1 hour, and 3 hours. The sliding window method was used to continuously update the gradient data.

[0042] Set up a three-level water level gradient change alarm:

[0043] If the water level rise rate in 1 hour is >5cm / h and <20cm / h or the cumulative rise in 3 hours is >10cm and <50cm, it will be set as Level 1 warning:

[0044] Display a yellow warning message on the HMI interface, send a text message reminder to the on-duty personnel, and increase the water level sampling frequency to once every 3 minutes;

[0045] The staff on duty need to record water level data every hour, check the weather forecast and assess rainfall trends.

[0046] If the water level rise rate in 1 hour is >20cm / h and <50cm / h or the cumulative rise in 3 hours is >50cm and <120cm or it is in the first-level alarm state for 2 consecutive hours, it will be set as the second-level warning:

[0047] The HMI interface displays an orange warning message and flashes, and SMS and phone notifications are sent to the on-duty personnel and management. The water level sampling frequency is increased to once every 1 minute, and the flood control alarm is automatically activated to prepare to open the sand flushing gate, and the system enters the standby state;

[0048] The staff on duty record the water level data every 30 minutes, notify the relevant downstream units to make flood prevention preparations, and check the gate system to ensure it can operate normally.

[0049] If the water level rise rate in one hour is >50cm / h or the cumulative rise in three hours is >120cm or it is in the second-level alarm state for one hour or the water level exceeds the warning level, it will be set to the third-level warning:

[0050] The HMI interface displays a red warning message accompanied by a sound reminder, sends an emergency notification to all relevant personnel, increases the water level sampling frequency to once every 30 seconds, and automatically activates the emergency flood prevention plan. If the water level continues to rise, the sand flushing gate and flood discharge gate will be automatically opened;

[0051] The personnel on duty continuously monitor the water level changes, activate the flood emergency command system, and notify downstream areas to prepare for emergency evacuation.

[0052] When the water level exceeds 1541m, the dam LCU collects the water level measurement data and the corresponding water level gradient value before the gate, and issues a gradient alarm message through comprehensive judgment by the program to avoid the possibility of ultra-high water level operation and flooding of the dam due to failure to timely discover the rapid rise in water level.

[0053] At the same time, the target water level dead zone is set. When the water level rises to the set target water level dead zone, the dam LCU program automatically starts the flood control alarm in advance to warn the personnel in the downstream flood discharge area to evacuate, and sends out an alarm message to remind the operator every 1 minute. If the water level rise gradient exceeds the set value, or when the rise reaches the target water level dead zone (+0.15m), an alarm is issued to remind the operator that the gate joint control process is about to start, and the operator is reminded every 20 seconds. After three reminders, the program issues instructions to perform gate lifting operations. During the three reminders, the operator can intervene to terminate the gate lifting warning and gate lifting operations.

[0054] S2: Based on the set water level warning, the collected water level information is analyzed to build a power station dam control system.

[0055] The control units of the sand flushing gates and 1# to 3# flood discharge gate winch-type gate hoists of the power station dam are connected to the LCU switch of the power station dam through a single Ethernet to build a power station dam control system.

[0056] The power station dam control system includes the dam LCU, sand flushing gate control unit, and flood discharge gate control unit (1#~3#). The LCU and each control unit are directly connected to the LCU switch. The power station dam LCU switch is connected to the switch station LCU switch through a single-mode optical fiber. The corresponding system structure diagram is shown in the figure below. Figure 2 shown.

[0057] Furthermore, an SM-2558 Ethernet card and an SM-0551 serial port card are added to each controller of the control unit of the power station dam sand flushing gate and 1# to 3# flood discharge gate winch hoist to form a redundant communication channel. The redundant Ethernet channel communicates with the host computer and the control node of the dam LCU; the redundant serial port channel collects the gate opening and load data through the RS232 to RS 485 converter and the existing opening load meter using the Modbus / RTU communication protocol.

[0058] In order to monitor the communication status of the dam control system, the dam LCU and the power station dam sand flushing gate, 1#~3# flood discharge gate winch hoist control unit add communication site status monitoring to prepare for the control mode switch when the communication is interrupted. When the gate dam LCU control handle is in "remote / local", the gate linkage function is consistent with the LCU control mode "Chengdu, Baima, Muzuo / gate dam touch screen", and displays the communication status of each control unit with the SCADA in various places, as well as the main and standby status of the network card of each gate control unit. The joint control can only be operated on the gate joint control when the gate dam LCU control handle is in "remote".

[0059] S3: Control the power station dam based on the power station dam control system.

[0060] The power station dam control system includes the dam LCU, sand flushing gate control unit, and 1#~3# flood discharge gate control units.

[0061] The operators manually monitor the dam water level and determine whether the gate needs to be remotely opened or closed based on the water level to control the dam water level. This method has the disadvantages of increasing the labor intensity of the operators and slow response. When the communication between the dam control unit and the main control center is interrupted, the dam gate is in an unmanned and out-of-control state, and it is impossible to operate the gate or adjust the dam water level, which poses certain safety risks.

[0062] In order to solve the above problems, the gate joint control function is added to the dam LCU, and the gate is automatically raised and lowered through the gate joint control, including:

[0063] Each gate control unit controls the gate of the unit. The "remote" operation mode is divided into single control and joint control:

[0064] When the control unit is in "single control", the operator shall perform manual operation according to actual needs;

[0065] When the communication is normal, the switching between single control and joint control is performed by the operator. After the "joint control" is put into operation, the operator cannot operate it manually. The gate that cannot be operated "remotely" is not allowed to be put into or automatically exit the "joint control": including judging whether the power supply is normal, whether there is a signal to lock the gate opening and closing, whether the communication with the LCU is normal, etc.;

[0066] Furthermore, the single-hole gate is added to the joint control, the target water level tracks the actual water level value and remains unchanged, and the gate opening remains unchanged.

[0067] When a single-hole gate is added to the joint control, the setting value mode of the gate will be automatically activated.

[0068] The actual calculated water level value is based on the radar water level:

[0069] When there is no abnormality in the three water level channels, take the average of the two radar water levels;

[0070] When an abnormality occurs in a water level channel;

[0071] If there is no abnormality in the radar channel, the average of the two radar water levels is still taken;

[0072] If the radar channel is abnormal, use another radar channel;

[0073] When abnormalities occur in two water level channels, the channel without abnormalities is used;

[0074] When an abnormality occurs in the three water level channels, a sensor alarm is issued and the joint control is exited.

[0075] The strategy of joint control is: when the target value is changed beyond the upper and lower warning values, the gate opening is allocated according to the priority principle. When the target water level is higher than the upper warning value, the gate single action opening is given priority to the gate with a smaller number, and gradually accumulated to the current gate opening upper limit, and the remaining opening is automatically allocated to the next hole gate. When the target water level is lower than the lower warning value, the gate single action opening is given priority to the gate with a larger number, and gradually decreased to the current gate opening lower limit, and the remaining opening is automatically allocated to the next hole gate.

[0076] The gate joint control function uses the three-average strategy to obtain the calculated water level value based on the water level measurement value in front of the dam gate, and uses this as the reservoir water level joint control unit for 4 sets of gates. The corresponding joint control process is implemented in the dam LCU.

[0077] When the dam LCU communicates normally with the host computer system and the gate control unit, the joint control function is exited by the operator;

[0078] When the communication between the dam LCU and a gate control unit is interrupted, the gate joint control function of the gate will automatically exit;

[0079] The control units involved in the gate joint control operation must be in the "remote" automatic control state.

[0080] The relevant constant values ​​of the power station reservoir water level are shown in Table 1:

[0081] Table 1 Power station reservoir water level setting table

[0082] Reservoir water level Fixed value Dam crest elevation 1547.00m Flood control high water level 1545.00m Upper limit control water level Control water level +0.15m (default 1542.15m) Control water level The setting value should not exceed 1539m-1545m, the default value is 1542m Lower limit control water level Control water level -0.15m (default 1541.85m) Dead water level 1539.00m Base plate elevation 1528.00m

[0083] The dam control water level control range is between the lower limit control water level and the upper limit control water level. After the gate joint control process is started, the operator can intervene and terminate the execution process at any time. The joint control operation strategy of the power station dam LCU for the four sets of gates is as follows:

[0084] Each control unit sets the gate interlocking control operation flag to determine whether to participate in water level control and regulation according to the gate control unit and gate interlocking control function operation strategy.

[0085] Under the same conditions, the priority of gate joint control operation is as follows: open the sand flushing gate first, and then open the flood discharge gate after the opening of the sand flushing gate reaches 2m.

[0086] The adjustment order of 1#~3# flood discharge gates is manually set with priority (2, 3, 4) and automatic operation lock. "1" is the high priority, and the sand flushing gate is always "1" after being put into joint control. Ensure that the gates put into joint control are operated without obstacles. The operation opening of each gate does not exceed the full opening of 4.0m.

[0087] The single opening of the gate is manually controlled and the default setting is 0.1m.

[0088] For gates participating in joint control operation, if a fault occurs during operation, the system will automatically assign the unfinished gate opening to the gates participating in joint control operation in sequence until the gate opening meets the requirements. The maximum opening allowed for each gate is "fully open" 4.0m.

[0089] Trigger conditions for starting gate opening operation:

[0090] If the upstream water level exceeds the control water level, the gates will be opened in sequence by detecting whether the water level continues to rise to determine whether there is a continuous net inflow. If there is a continuous net inflow, the gates will be opened in sequence.

[0091] If the upstream water level exceeds the upper control water level, the gates will be opened directly in sequence.

[0092] Each hole gate opening operation:

[0093] When the gate opening conditions are met, the gate will be opened accordingly according to the gate joint control operation command;

[0094] The height of the sand flushing gate when it is first opened is 0.1m;

[0095] Water level control start operation:

[0096] If the water level exceeds the warning value, the sand flushing gate will be opened, and the opening height each time shall not exceed the set gate switch opening;

[0097] After the sand flushing gate is opened to 2m, the flood discharge gate with the highest priority will be opened in the order of priority, and so on;

[0098] After each opening, wait for a control cycle to determine the water level rise and fall.

[0099] When the upstream water level is between the upper limit control water level and the lower limit control water level, the current gate height remains unchanged.

[0100] Except for the first opening of each gate when it is in the fully closed state, the continued opening due to rising water levels should adjust the opening amplitude each time according to the rising water level, but the maximum single opening amplitude shall not exceed 1m.

[0101] Gate closing operation:

[0102] If the upstream water level drops to the lower control water level or below, the flood discharge gates with lower priority will be closed one by one in sequence.

[0103] Each closing operation waits for a control cycle, and if the upstream water level does not rise, the flood discharge gate continues to be closed. Similarly, if the opening is not enough, the second lowest priority gate is closed in sequence.

[0104] For subsequent time periods, the height of the flood discharge gate will be adjusted period by period according to the above rules, and the final water drawdown level of the power plant will be maintained between the upper control water level and the lower control water level.

[0105] Furthermore, the emergency operation and optimization of the power station dam gates include:

[0106] The gate control is not designed with protection against false operation. When the gate control system's opening and closing relay nodes are stuck, or the gate is mistakenly opened and closed due to external electromagnetic interference and other reasons, the gate cannot be automatically stopped in time. To this end, a protection program against false operation of the gate is added, and a program segment is added to the gate PLC to monitor the gate status in real time. When the gate's local control system is in "remote" mode and no control command is received, if the gate opening or closing signal is actuated or the gate opening changes, the gate PLC program automatically issues a stop order; if the gate still does not stop or the gate opening or closing signal is actuated again within a unit time after stopping, the gate emergency stop circuit is automatically started, and the circuit breaker with the shunt release is tripped.

[0107] Add rate over-limit alarm: Add rate over-limit alarm program segment in the gate local control PLC to monitor the whole process of gate opening and closing in real time. When the gate opening feedback value change rate exceeds the rate setting range, an automatic alarm will be issued; the rate setting range needs to be measured according to the gate state. When the gate opening feedback value change rate is greater than the rate setting upper limit, it indicates that the opening feedback may be abnormal. When it is less than the rate setting lower limit, it indicates that the gate may be blocked or the hydraulic transmission mechanism may be abnormal, and on-site inspection and processing are required.

[0108] The gate stop criterion in the setting of opening control is not perfect. The current design of the gate stop condition is to stop the gate only when the absolute value of the difference between the gate feedback opening and the given opening is less than the set dead zone. If the gate opening feedback jumps during operation or the feedback value does not change, it will cause the gate to open and close to the given value. The gate cannot stop normally. For this reason, add a gate stop criterion: during the gate lifting process, when the gate feedback opening value is greater than the gate given opening value, the gate will stop automatically; during the gate closing process, when the gate feedback opening value is less than the gate given opening value, the gate will stop automatically; and prevent the gate from repeatedly rising and falling near the set value.

[0109] Furthermore, a gate control system simulation mode is constructed to simulate the dam water level and gate status and the gate joint control operation dynamics without the actual operation of the gate.

[0110] In the gate joint control simulation mode, the gate joint control program and the gate control unit DO are locked and not output. The system simulation program is implemented in the dam LCU, and a separate simulation system human-machine interface screen is set up in the host computer screen of the centralized control center. The function of manually inputting water level is added to the HMI interface or a water level change curve generator is created to simulate water level changes under different scenarios.

[0111] Create a virtual gate object, including properties such as position and opening, update the virtual gate status according to the control logic, and then generate a simulation status display, including the current water level, water level trend chart, gate opening status and alarm information display; analyze and record the simulation results, display the timeline of key events, generate a simulation report, and record relevant data.

[0112] It should be noted that the simulation mode has obvious markings to prevent confusion with actual operations. In the simulation mode, the actual gate control instructions are doubly locked by hardware and software. When exiting the simulation mode, the operator is required to confirm.

[0113] In summary, the present invention not only enhances the system's ability to cope with emergencies by introducing automated linkage control and optimized control strategies, but also reduces unnecessary equipment operations and extends equipment life. By combining the absolute value of the water level, the rate of change and the predicted trend, the water situation can be assessed more comprehensively and accurately, thereby making more intelligent decisions, which not only improves the efficiency of daily operations, but also greatly enhances the ability to cope with extreme weather events such as heavy rains and floods. The modular design enhances the scalability of the system, making it easy to adapt to the needs of different hydropower stations. It not only improves the operating efficiency and safety of a single hydropower station, but also provides new ideas and technical support for the intelligent management of the entire water conservancy system, which has a profound impact on the sustainable utilization and management of water resources.

[0114] Example 2

[0115] Reference Figure 1 Based on the first embodiment, this embodiment further provides a power station gate and water level automatic linkage control system, including:

[0116] The collection module is used to collect water level information data, process the water level signal data by three-way averaging, and set water level warning;

[0117] A construction module is used to analyze the collected water level information according to the set water level warning and build a power station dam control system;

[0118] The control module is used to control the power station dam according to the power station dam control system.

[0119] This embodiment also provides a computer device, which is suitable for the automatic linkage control method of power station gate and water level, including a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the automatic linkage control method of power station gate and water level proposed in the above embodiment.

[0120] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0121] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the method for realizing automatic linkage control of a power station gate and a water level as proposed in the above embodiment is implemented.

[0122] The storage medium proposed in this embodiment and the data storage method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be found in the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0123] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for automatically linking a power station gate with a water level, characterized in that: Including, Collecting water level information data, processing the water level signal data by taking the average of three samples, and setting water level warnings; Based on the set water level warnings, analyzing the collected water level information to construct a power station dam control system; Realizing the control of the power station dam based on the power station dam control system.

2. The automatic linkage control method of power station gate and water level according to claim 1, characterized in that: The collection of the water level information data adopts the method of taking the average of three samples. Specifically: Set three radars to measure the water level information. If there is no abnormality in the three water level channels, take the average of the two radar water levels; When one water level channel has an abnormality; If the radar channel is normal, still take the average of the two radar water levels; If the radar channel is abnormal, use another radar channel; When two water level channels have abnormalities, use the non-abnormal channel; When all three water level channels have abnormalities, issue a sensor alarm.

3. The automatic linkage control method of power station gate and water level according to claim 2, characterized in that: The water level warning issues an alarm prompt by setting three-level water level gradient changes, including: If the water level rise rate in 1 hour > p cm / h and < q cm / h or the cumulative rise in 3 hours > n cm and < m cm, it is set as a first-level warning: Display a yellow warning message on the HMI interface, send a text message reminder to the on-duty personnel, and increase the water level sampling frequency to once every 3 minutes; The on-duty personnel need to record the water level data once every 1 hour, check the weather forecast, and evaluate the rainfall trend; If the water level rise rate in 1 hour > q cm / h and < d cm / h or the cumulative rise in 3 hours > m cm and < x cm or continuously in the first-level alarm state for 2 hours, it is set as a second-level warning: The HMI interface displays an orange warning message and flashes, sends text messages and phone notifications to the on-duty personnel and management, increases the water level sampling frequency to once every 1 minute, automatically starts the flood control alarm, prepares to open the sand flushing gate, and the system enters a standby state; The on-duty personnel record the water level data once every 30 minutes, notify the relevant downstream units to make flood control preparations, and check the gate system; If the water level rise rate in 1 hour > d cm / h or the cumulative rise in 3 hours > x cm or continuously in the second-level alarm state for 1 hour or the water level exceeds the warning water level, it is set as a third-level warning: The HMI interface displays a red warning message with a sound reminder, sends an emergency notice to all relevant personnel, increases the water level sampling frequency to once every 30 seconds, automatically starts the emergency flood control plan, and if the water level continues to rise, automatically opens the sand flushing gate and the flood discharge gate; The on-duty personnel continuously monitor the water level change, start the flood control emergency command system, and notify the downstream areas to make preparations for emergency evacuation.

4. The automatic linkage control method of power station gate and water level according to claim 3, characterized in that: The power station dam control system includes a power station dam sand flushing gate unit, a 1# flood discharge gate hoist control unit, a 2# flood discharge gate hoist control unit, a 3# flood discharge gate hoist control unit, and a power station dam LCU; The power station dam sand flushing gate, the 1# flood discharge gate hoist control unit, the 2# flood discharge gate hoist control unit, and the 3# flood discharge gate hoist control unit are connected to the power station dam LCU switch by a single-channel Ethernet method to construct a power station dam control system; When monitoring the communication status of the dam control system, the dam LCU and the power station dam sand flushing gate, 1#~3# flood discharge gate winch hoist control unit add status monitoring of the communication site. When the gate dam LCU control handle is in the "remote / local" position, the gate linkage function is consistent with the LCU control mode "Chengdu, Baima, Muzuo / gate dam touch screen", and displays the communication status of each control unit with local SCADA, as well as the main and standby status of the network card of each gate control unit. The joint control can only be operated on the gate joint control when the gate dam LCU control handle is in the "remote" position.

5. The automatic linkage control method of power station gate and water level according to claim 4, characterized in that: The control of the power station dam includes: Add gate linkage control function to the dam LCU to realize automatic lifting of gates through gate linkage control, including: Each gate control unit controls the gate of the unit. The "remote" operation mode is divided into single control and joint control: When the control unit is "single control", the operator shall perform manual operation according to actual needs; When the communication is normal, the switching between single control and joint control is performed by the operator. After the "joint control" is put into operation, the operator cannot operate manually. The gate that cannot be operated "remotely" is not allowed to be put into or automatically exit the "joint control": including judging whether the power supply is normal, whether there is a signal to lock the gate opening and closing, and whether the communication with the LCU is normal; Furthermore, the single-hole gate is added to the joint control, the target water level tracks the actual water level value and remains unchanged, and the gate opening remains unchanged; When a single-hole gate is added to the joint control, the setting value mode of the gate will be automatically activated; The actual calculated water level value is based on the radar water level: When there is no abnormality in the three water level channels, take the average of the two radar water levels; When an abnormality occurs in a water level channel; If there is no abnormality in the radar channel, the average of the two radar water levels is still taken; If the radar channel is abnormal, use another radar channel; When abnormalities occur in two water level channels, the channel without abnormalities is used; When an abnormality occurs in the three water level channels, a sensor alarm is issued and the joint control is exited; The strategy of the joint control is: when the set target value is changed to exceed the upper and lower warning values, the gate opening is allocated according to the priority principle. When the target water level is higher than the upper warning value, the gate single action opening is given priority to the gate with a smaller number, and it is accumulated one by one to the current gate opening upper limit value, and the remaining opening is automatically allocated to the next hole gate; when the target water level is lower than the lower warning value, the gate single action opening is given priority to the gate with a larger number, and it is gradually reduced to the current gate opening lower limit value, and the remaining opening is automatically allocated to the next hole gate; The gate joint control function uses the three-average strategy to obtain the calculated water level value based on the water level measurement value in front of the dam gate, and uses this as the reservoir water level joint control unit for the four gates. The corresponding joint control process is implemented in the dam LCU; When the dam LCU communicates normally with the host computer system and the gate control unit, the joint control function is exited by the operator; When the communication between the dam LCU and a gate control unit is interrupted, the gate joint control function of the gate will automatically exit; The control units involved in the gate joint control operation must be in the "remote" automatic control state.

6. The automatic linkage control method of power station gate and water level according to claim 5, characterized in that: The joint control operation strategy of the power station dam LCU for the four sets of gates includes: Each control unit sets a gate inter-control operation flag to indicate whether to participate in water level control and regulation according to the gate control unit and gate inter-control function operation strategy; Under the same conditions, the priority of gate joint control operation is as follows: open the sand flushing gate first, and then open the flood discharge gate after the opening of the sand flushing gate reaches hm; The adjustment sequence of 1# flood discharge gate ~ 3# flood discharge gate is manually set with priority and automatic operation lock, "1" is high priority, and the sand flushing gate is always "1" after being put into joint control, and the action opening of each gate does not exceed the full opening am; Manually set the gate opening, the default is wm; For the gates participating in the joint control operation, if a fault occurs during the operation, the system will automatically assign the unfinished gate opening to the gates participating in the joint control operation in sequence until the gate opening meets the requirements. The maximum opening allowed for each gate is "fully open" am; Trigger conditions for starting gate opening operation: If the upstream water level exceeds the control water level, the gates will be opened in sequence by detecting whether the water level continues to rise to determine whether there is a continuous net inflow. If there is a continuous net inflow, the gates will be opened in sequence. If the upstream water level exceeds the upper control level, the gates will be opened directly in sequence; Each hole gate opening operation: When the gate opening conditions are met, the gate will be opened accordingly according to the gate joint control operation command; The height of the sand flushing gate when it is opened for the first time is wm; Water level control start operation: If the water level exceeds the warning value, the sand flushing gate will be opened, and the opening height each time shall not exceed the set gate switch opening; After the sand flushing gate is opened to the tm opening, the high-priority flood discharge gate is opened in the order of priority, and so on; Each time it is turned on, wait for a control cycle to determine the water level rise and fall; When the upstream water level is between the upper limit control water level and the lower limit control water level, the current gate height is kept unchanged; Except for the first opening of each gate in the fully closed state, the opening amplitude of each gate shall be adjusted according to the water level rise when the gate is opened again due to the water level rise, but the maximum opening amplitude of a single gate shall not exceed 1m; Gate closing operation: If the upstream water level drops to or below the lower control water level, the flood discharge gates with lower priority will be closed one by one in order; Each closing operation waits for a control cycle. If the upstream water level does not rise, continue to close the flood discharge gate. Similarly, if the opening is not enough, close the gate with the second lowest priority in sequence. For subsequent time periods, the height of the flood discharge gate will be adjusted period by period according to the above rules, and the final water level drawdown will be maintained between the upper and lower control water levels.

7. The automatic linkage control method of power station gate and water level according to claim 6, characterized in that: The emergency operation and optimization of the power station dam gate include: Add a protection program to prevent the gate from malfunctioning, add a program segment in the gate PLC, and monitor the gate status in real time. When the gate local control system is in "remote" mode and no control command is received, if the gate opening or closing signal is activated or the gate opening changes, the gate PLC program automatically issues a stop command; if the gate still does not stop or the gate opening or closing signal is activated again within a unit time after stopping, the gate emergency stop circuit is automatically started and the circuit breaker with shunt release is tripped; Add rate over-limit alarm: Add rate over-limit alarm program segment in the gate local control PLC to monitor the whole process of gate opening and closing in real time. When the gate opening feedback value change rate exceeds the rate setting range, an automatic alarm will be triggered. The rate setting range needs to be measured according to the gate state. When the gate opening feedback value change rate is greater than the rate setting upper limit, it indicates that the opening feedback may be abnormal. When it is less than the rate setting lower limit, it indicates that the gate may be blocked or the hydraulic transmission mechanism may be abnormal, and on-site inspection and treatment are required. Add gate stopping criteria: during gate lifting, when the gate feedback opening value is greater than the gate given opening value, the gate will stop automatically; during gate closing, when the gate feedback opening value is less than the gate given opening value, the gate will stop automatically; and prevent the gate from repeatedly rising and falling near the set value.

8. A power station gate and water level automatic linkage control system, based on the power station gate and water level automatic linkage control method according to any one of claims 1 to 7, characterized in that: include, The collection module is used to collect water level information data, process the water level signal data by three-way averaging, and set water level warning; A construction module is used to analyze the collected water level information according to the set water level warning and build a power station dam control system; The control module is used to control the power station dam according to the power station dam control system.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for automatic linkage control of power station gate and water level as claimed in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for automatic linkage control of a power station gate and a water level as claimed in any one of claims 1 to 7 are implemented.

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