CN116382062A - Hydropower station flooding factory building early warning system - Google Patents

Abstract

The invention provides a hydropower station flooding plant early warning system, which comprises a flooding plant detection module, a water level sensor, a PLC monitoring system and a control system, wherein the flooding plant detection module is used for detecting flooding information of relevant layers in a plant; the early warning program execution module is used for starting an emergency shutdown process when receiving the public LCU and the unit LCU shutdown command at the same time, and closing a unit water inlet gate; and the early warning workstation module is used for assisting plant operators on duty to evacuate in emergency when water leakage or flooding occurs through the camera and the broadcasting when receiving the early warning signal. According to the invention, the liquid level meter and the liquid level switch are used as detection elements, and the detection elements are arranged from the tail water gallery layer, so that the service life of the detection elements in a humid environment is prolonged, and the safety and stability of system operation are improved.

Description

Hydropower station flooding factory building early warning system

Technical Field

The invention relates to the field of hydropower station flooding plant early warning, in particular to a hydropower station flooding plant early warning system.

Background

According to a plurality of regulations of unmanned on duty of hydropower plants published by a national electric company in 2002, the hydropower plants are required to be provided with a water-flooded plant control system, and an alarm and signal action is required to be started to act on a unit for emergency shutdown when a water-flooded plant accident occurs. The early warning system of the flooding factory building can timely and effectively perform early warning, stop and close the water inlet gate when the flooding factory building occurs, inform factory building personnel of timely evacuation, and can effectively reduce casualties and economic losses. However, the existing early warning system for the hydropower station flooding factory building has more problems in actual use:

firstly, a liquid level switch is arranged in a 985 tail water gallery of a flooded plant, if a flooded plant condition occurs, stopping operation is carried out when the flooded plant reaches a 999 taper pipe gallery, so that great damage is possibly generated, corresponding operation cannot be carried out in time to reduce loss, the flooded plant condition is judged simply by the liquid level switch, the judging mode is single, and the unit is possibly stopped by mistake due to the false alarm condition;

secondly, the taper pipe entrance doors of each group of units are horizontally communicated, and if the taper pipe entrance door of one group of units has water permeability, the system can not effectively monitor;

furthermore, if the power plant is not provided with an emergency stop starting pressing plate, the emergency stop command is directly started when the test and inspection of the flooded plant are carried out, so that the unit is not stopped and larger economic loss is generated;

finally, the signal transmission mode adopts network transmission modes such as a local switch and the like to carry out signal transmission, and as the installation position of the detection element of the flooded plant is positioned at a lower position of a high-rise plant, the humidity of the installation position is very high, the service life of electronic components in a humid environment can be greatly reduced, the safe and stable operation of the system is influenced, and the early warning system of the flooded plant can be refused, so that the safety of a plant set and personnel is seriously influenced; meanwhile, the wet environment not only affects the service life and stability of the equipment, but also greatly increases the later maintenance cost and increases the workload of maintenance personnel, which is contrary to the unmanned on duty and unmanned on duty concepts of hydropower stations.

In order to solve the problems, the needs of timely early warning, personnel casualties reduction and economic loss reduction when the hydropower station floods the factory building are met, and an early warning system of the hydropower station floods the factory building is urgently needed to be established.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a hydropower station flooding factory building early warning system and a hydropower station flooding factory building early warning method, which are used for solving the problems that in the prior art, detection elements of the early warning system are unreasonable to set, a judging mode is single, the system is unstable to operate, and the early warning system is difficult to adapt to the ideas of unmanned on duty and unmanned on duty of the hydropower station.

The invention provides a hydropower station flooding factory building early warning system and a hydropower station flooding factory building early warning method, wherein a floating ball type liquid level meter and a floating ball type liquid level switch are used as detection elements, meanwhile, the detection elements are arranged from a 985m tail water gallery layer, the service life of the detection elements in a humid environment is prolonged, the safety and stability of system operation are improved, sufficient problem solving time is provided for staff, risks of factory building units and staff in working are reduced, and meanwhile, the occurrence frequency of loss caused by single judgment mode is effectively reduced through auxiliary monitoring of a camera; in addition, the emergency stop opening pressing plate is arranged, so that economic losses caused when the water-flooded factory building test is carried out are effectively reduced.

The invention provides a hydropower station flooding plant early warning system which comprises a flooding plant detection module, an early warning program execution module and an early warning workstation module, wherein the flooding plant detection module is divided into a public LCU and a unit LCU, the public LCU and the unit LCU are communicated through network equipment, the flooding plant detection module comprises a plurality of PLC monitoring systems, a liquid level meter, a liquid level switch, an emergency stop opening pressing plate and an upper computer server which form ring network communication, the PLC monitoring systems are arranged in the unit LCU, the liquid level meter and the liquid level switch are arranged on related layers, the related layers are a 985m tail water gallery layer, a 999m unit 1 taper pipe entrance door, a 999m unit 2 taper pipe entrance door and a 1002.5m technical water supply layer, the liquid level meter is used for monitoring the accumulated water real-time height of the related layers, and the emergency stop opening pressing plate is arranged in the public LCU.

The water logging factory building detection module is used for detecting water logging information of the relevant layer in the factory building, after the liquid level switch is triggered by rising of the water of the relevant layer, the liquid level switch uploads the rising information of the water in the factory building to the PLC monitoring system, the PLC monitoring system sends a water level high early warning signal or a water level high stop signal to the public LCU or the unit LCU through a logic judgment method, and the logic judgment process of the PLC monitoring system is displayed through the upper computer server and stored in the upper computer server;

early warning program execution module: the detection module is connected with the flooding plant and is used for starting an emergency shutdown process after receiving the public LCU shutdown command to the machine LCU and when the unit LCU shutdown command is sent out, and closing a unit water inlet gate;

early warning workstation module: the detection module is connected with the flooded plant and consists of a broadcast and a camera arranged above the 985m tail water gallery layer and at all positions in the plant, and is used for assisting a plant attendant to carry out video monitoring on the flooded condition of the plant in a monitoring room through the camera when receiving a water level high early warning signal sent by the flooded plant detection module, and immediately notifying the operator in the plant to carry out emergency evacuation through broadcast voice if the water leakage or the flooded condition in the plant is judged through the video monitoring; if the detection element is judged to be a false alarm signal through video monitoring, a maintainer is informed in time to check whether the detection element has faults or not.

Preferably, the liquid level meter and the liquid level switch are of a floating ball type, signal transmission is carried out between the liquid level meter, the liquid level switch and the PLC monitoring system through hard cable wiring, and the PLC monitoring system is communicated with the upper computer server through network equipment.

Preferably, the common LCU is configured to detect a lowest point of a relevant layer of the plant, and the common LCU detection flooding information program is: 1 branch of liquid level meter is arranged on the 985m tail water corridor layer, 3 branches of liquid level switches are respectively arranged at the positions 0.5m and 1m away from the ground of the 985m tail water corridor layer, 3 branches of liquid level switches are also arranged at the position 1m away from the ground of the unit gate of each unit in the middle of the No. 1 taper pipe entrance door of the 999m unit, and liquid level switch quantity signals and liquid level meter analog quantity signals are sent into the public LCU through cables; when the height of accumulated water triggers any 2 of the 3 liquid level switches which are arranged at the 985m tail water gallery layer and 0.5m away from the ground, the PLC monitoring system sends out an early warning signal after performing three-out-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the 985m tail water gallery layer 1m away from the ground, the PLC monitoring system outputs a first shutdown signal after performing three-out-of-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the middle of the V999 m unit 1 taper pipe entrance door and 1m distance between the unit gate of each group of units and the ground, the PLC monitoring system outputs a second stop signal after performing three-out-two logic judgment; after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the public LCU is input by an emergency stop starting and stopping plate, and meanwhile, the public LCU starting and stopping signal is sent to LCUs of all units;

the unit LCU is used for observing water accumulation conditions of water supply layers of single unit technologies and helping technicians judge water flooding factory building conditions, and the unit LCU detects water flooding information programs as follows: 1 liquid level meter is arranged in each group of unit technology water supply chambers of the technical water supply layer 1002.5m, 1 liquid level switch is arranged at the position 0.5m away from the ground of the technical water supply layer 1002.5m, 1 liquid level switch is respectively arranged at the position 0.5m away from the ground of each group of units of the step-up 999m unit No. 2 taper pipe entrance door, 2 liquid level switches are respectively arranged at the position 1m away from the ground of each group of units of the step-up 999m unit No. 2 taper pipe entrance door, and liquid level switch quantity signals and liquid level meter analog quantity signals are sent into the unit LCU through cables; when the height of the accumulated water triggers the liquid level switch which is arranged at the 999m2 taper pipe entrance and is 0.5m away from the ground, the PLC monitoring system sends out an early warning signal; when the height of accumulated water triggers 2 liquid level switches arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and any 2 liquid level switches arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, the PLC monitoring system starts a shutdown command after performing three-out-of-two logic judgment.

Preferably, the detection module of the flooded plant further comprises a network switch, the network switch is used for forming all the PLC monitoring systems into a ring network, all the PLC monitoring systems can communicate with each other, and the PLC monitoring systems send signals to the public LCU and the unit LCU through the network switch.

Preferably, an emergency stop opening pressing plate is also arranged in the unit LCU and used for regularly verifying the function of the flooded plant, so that the unit is not stopped.

Preferably, the No. 2 taper pipe entrance doors of each group of units are not directly and horizontally communicated with the No. 1 taper pipe entrance corridor; the human entrance corridor of the vertebral canal number 1 of each group of units is horizontally communicated, and the technical water supply chambers of each group of units of the technical water supply layer of the 1002.5m technology are not directly horizontally communicated.

Preferably, when the water accumulation height triggers 2 liquid level switches respectively arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and any 2 liquid level switches arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, after the PLC monitoring system performs three-out-of-two logic judgment, a shutdown command is issued to the units corresponding to the triggered liquid level switches, and the rest of units not triggered corresponding liquid level switches can continue to operate and monitor, and the units issued with the shutdown command are processed by technicians after confirming no water accumulation or water flooding factory building conditions; if any 2 liquid level switches corresponding to each group of units are triggered, after the PLC monitoring system performs three-out-of-two logic judgment, a shutdown command is issued to LCU of each group.

Preferably, after the public LCU shutdown command is started to the machine LCU, after any group of LCU shutdown commands are sent out, the early warning program execution module can start an emergency shutdown process, and the water inlet gate of the machine set is closed.

The invention also provides a hydropower station flooding factory building early warning method:

s1: the water logging information collection comprises public LCU water logging information collection and unit LCU water logging information collection:

s11: the specific detection method for the public LCU flooding information acquisition comprises the following steps: 1 branch of liquid level meter is arranged on the 985m tail water gallery layer, 3 branches of liquid level switches are respectively arranged at the positions 0.5m and 1m away from the ground of the 985m tail water gallery layer, 3 branches of liquid level switches are also arranged at the positions 1m away from the ground of the unit gate of each unit in the middle of the 999m unit 1 taper pipe entrance door, and an emergency stop opening pressing plate are also arranged; the 1-branch liquid level meter arranged on the 985m tail water gallery layer is used for monitoring the height of accumulated water in the gallery in real time, and when the accumulated water height triggers any 2 of the 3-branch liquid level switches arranged on the 985m tail water gallery layer and 0.5m away from the ground, the PLC monitoring system performs three-out-two logic judgment and then sends out an early warning signal; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the 985m tail water gallery layer 1m away from the ground, the PLC monitoring system outputs a first shutdown signal after performing three-out-of-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the middle of the V999 m unit 1 taper pipe entrance door and 1m distance between the unit gate of each group of units and the ground, the PLC monitoring system outputs a second stop signal after performing three-out-two logic judgment; after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the public LCU is input by an emergency stop starting and stopping plate, and meanwhile, the public LCU starting and stopping signal is sent to LCUs of all units;

s12: the unit LCU flooding information acquisition method specifically comprises the following steps: 1 liquid level meter is arranged in each group of unit technology water supply chambers of the technical water supply layer of No. 1002.5m, 1 liquid level switch is arranged at the position of 0.5m of the technical water supply layer of No. 1002.5m from the ground, 1 liquid level switch is respectively arranged at the position 0.5m away from the ground of each group of units of the 999m2 conical pipe entrance door, and 2 liquid level switches are respectively arranged at the position 1m away from the ground of each group of units of the 999m2 conical pipe entrance door; when the height of the accumulated water triggers the liquid level switch which is arranged at the 999m2 taper pipe entrance and is 0.5m away from the ground, the PLC monitoring system sends out an early warning signal; when the height of accumulated water triggers any 2 of 2 liquid level switches arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and 1 liquid level switch arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, the PLC monitoring system starts a shutdown command after performing three-out-of-two logic judgment;

s2: executing an early warning program, wherein the public LCU stop command is started to the machine LCU, and simultaneously, after the machine set LCU stop command is sent out, an emergency stop flow is started, and a machine set water inlet gate is closed;

s3: after receiving the early warning signal sent by the early warning program judging system, assisting a plant attendant to carry out video monitoring on the water flooding condition of the plant in a monitoring room through a camera, and immediately notifying the operator in the plant of emergency evacuation through broadcast voice if the water leakage or the water flooding condition in the plant is judged through video monitoring; if the detection element is judged to be a false alarm signal through video monitoring, a maintainer is informed in time to check whether the detection element has faults or not.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1. according to the invention, the detection element is arranged from the 985 tail water gallery, and by the aid of the camera and the broadcasting, when the situation of flooding a factory building occurs, a person on duty can observe the situation of flooding in time when a voice alarm occurs, so that sufficient time for solving the problem is provided for the staff, the risks of the factory building set and the staff during working are reduced, and the occurrence frequency of loss caused by single judgment mode is reduced; meanwhile, by arranging the emergency stop opening pressing plate, the accuracy of the action of the monitoring element of the water flooded factory building can be conveniently checked when the monitoring element is manually tested, the machine set is not stopped, and the safe operation of the machine set is ensured;

2. according to the invention, the taper pipe entrance doors of each group of units are not directly and horizontally communicated, so that the unit system can normally operate and monitor under the condition that the taper pipe entrance doors of the single group of units are permeable;

3. in the information collection of the flooded factory building, simple equipment such as a liquid level meter and a liquid level switch are added to serve as detection elements, and the detection elements and a PLC monitoring system are subjected to signal transmission through hard cable wires, so that the influence of a humid environment is avoided, the service life of the equipment is further ensured, the safety and stability of the system operation are improved, the investment of maintenance cost and human resources is reduced, and the concept of unmanned on duty and unattended operation of a hydropower station is further satisfied;

4. the invention has reasonable installation and setting positions, quantity and program logic writing of the early warning detection elements, improves the accuracy of judging the water leakage or water flooding factory building conditions of the machine set, can perform early warning or emergency shutdown, and effectively reduces the frequency of false operation or refusal operation instructions caused by the emergency shutdown.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a block diagram of a warning system for a hydropower station flooded plant in an embodiment of the invention.

Fig. 2 is a flowchart illustrating an early warning procedure of a hydropower station flooding plant early warning system according to an embodiment of the present invention.

Fig. 3 is a block diagram of a related layer structure of a warning system for a hydropower station flooding plant in an embodiment of the invention.

Fig. 4 is a flowchart of a hydropower station flooding plant early warning method in an embodiment of the invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-3, a hydropower station flooding plant early warning system comprises a flooding plant detection module, an early warning program execution module and an early warning workstation module, wherein the flooding plant detection module is divided into a public LCU and a unit LCU, the public LCU and the unit LCU are communicated through network equipment, the flooding plant detection module comprises a plurality of PLC monitoring systems, a liquid level meter, a liquid level switch, an emergency shutdown opening pressing plate and an upper computer server which form ring network communication, the PLC monitoring systems are arranged in the unit LCU, the liquid level meter and the liquid level switch are arranged on a relevant layer, the relevant layer is a 985m tail water gallery layer, a 999m unit No. 1 taper pipe entrance door, a 999m unit No. 2 taper pipe entrance door and a 1002.5m technical layer, the liquid level meter is used for monitoring the real-time water supply height of the relevant layer, and the emergency shutdown opening pressing plate is arranged in the public LCU.

The water logging factory building detection module is used for detecting water logging information of the relevant layer in the factory building, after the liquid level switch is triggered by rising of accumulated water of the relevant layer, the liquid level switch uploads the rising information of accumulated water in the factory building to the PLC monitoring system, the PLC monitoring system sends a water level high early warning signal or a water level high stop signal to the public LCU or the unit LCU through a logic judgment method, and the logic judgment process of the PLC monitoring system is displayed through the upper computer server and stored in the upper computer server.

In order to realize the technical scheme, the invention uses simple equipment, namely the liquid level meter and the liquid level switch, as the detection element for detecting the flooding degree of the factory building, effectively avoids the influence of the wet environment of the factory building on the detection equipment, and further ensures the reliability and the safety of the system operation.

Preferably, the liquid level meter and the liquid level switch are of a floating ball type, signal transmission is carried out between the liquid level meter, the liquid level switch and the PLC monitoring system through hard cable wiring, and the PLC monitoring system is communicated with the upper computer server through network equipment.

Specifically, after the liquid level meter monitors the real-time height of the accumulated water of the relevant layer, the accumulated water height information is uploaded to the PLC monitoring system through hard wiring of a cable.

The invention patent with the publication number of CN111176203A and the patent name of 'a water-logging-proof factory building alarm control system of a hydropower plant' is characterized in that three water level meters are arranged in the water-logging factory building alarm control system, a PLC carries out 3-selection 2 logic judgment according to the fact that the water level of 3 water level meter signals input by all measuring points is higher/higher, if any 2 signals act on the 3 signals, a measuring point water level higher alarm is sent out, and at the moment, the system is not stopped, and only operation maintenance operators are informed to carry out field checking treatment; if any 2 signals of the 3 signals are input, the water level of the measuring point is over-high, an alarm is sent out, and when no failure exists at the measuring point, no inhibition exists at the measuring point, and the water level of the measuring point is over-high, a shutdown signal with the over-high water level is sent out to stop the corresponding unit, and meanwhile, an alarm of a flooding factory building and a command for starting a drainage system in the factory building are sent out.

In order to achieve the technical scheme, 3 liquid level switches are arranged at each detection point, after the liquid level switch at the corresponding position is triggered after accumulated water rises, if any 2 liquid level switches arranged at the position are triggered, the triggered liquid level switch signal action is transmitted to the PLC monitoring system, and after the PLC monitoring system performs three-out-of-two logic judgment, a corresponding early warning signal or a shutdown signal is sent out.

Preferably, the common LCU is configured to detect a lowest point of a relevant layer of the plant, and the common LCU detection flooding information program is: 1 branch of liquid level meter is arranged on the 985m tail water corridor layer, 3 branches of liquid level switches are respectively arranged at the positions 0.5m and 1m away from the ground of the 985m tail water corridor layer, 3 branches of liquid level switches are also arranged at the position 1m away from the ground of the unit gate of each unit in the middle of the No. 1 taper pipe entrance door of the 999m unit, and liquid level switch quantity signals and liquid level meter analog quantity signals are sent into the public LCU through cables; when the height of accumulated water triggers any 2 of the 3 liquid level switches which are arranged at the 985m tail water gallery layer and 0.5m away from the ground, the PLC monitoring system sends out an early warning signal after performing three-out-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the 985m tail water gallery layer 1m away from the ground, the PLC monitoring system outputs a first shutdown signal after performing three-out-of-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the middle of the V999 m unit 1 taper pipe entrance door and 1m distance between the unit gate of each group of units and the ground, the PLC monitoring system outputs a second stop signal after performing three-out-two logic judgment; after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the public LCU is input by an emergency stop starting and stopping plate, and meanwhile, the public LCU starting and stopping signal is sent to LCUs of all units;

the unit LCU is used for observing water accumulation conditions of water supply layers of single unit technologies and helping technicians judge water flooding factory building conditions, and the unit LCU detects water flooding information programs as follows: 1 liquid level meter is arranged in each group of unit technology water supply chambers of the technical water supply layer 1002.5m, 1 liquid level switch is arranged at the position 0.5m away from the ground of the technical water supply layer 1002.5m, 1 liquid level switch is respectively arranged at the position 0.5m away from the ground of each group of units of the step-up 999m unit No. 2 taper pipe entrance door, 2 liquid level switches are respectively arranged at the position 1m away from the ground of each group of units of the step-up 999m unit No. 2 taper pipe entrance door, and liquid level switch quantity signals and liquid level meter analog quantity signals are sent into the unit LCU through cables; when the height of the accumulated water triggers the liquid level switch which is arranged at the 999m2 taper pipe entrance and is 0.5m away from the ground, the PLC monitoring system sends out an early warning signal; when the height of accumulated water triggers 2 liquid level switches arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and any 2 liquid level switches arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, the PLC monitoring system starts a shutdown command after performing three-out-of-two logic judgment.

According to the invention, the detection element is arranged from the 985 tail water gallery, when the factory building is flooded, the factory building flooding condition can be found in advance, and sufficient time for solving the problem is provided for staff.

In order to achieve the above technical solution, the setting positions and the number of the detecting elements for detecting the flooding information of the factory building in the public LCU and the unit LCU are different, and after the liquid level switch is triggered, the flooding information is only uploaded to the associated public LCU/the unit LCU, but not to the non-associated public LCU/the unit LCU. For example, after the liquid level switches arranged at 0.5m and 1m distance from the tail water gallery layer with the thickness of 985m to the ground and 1m distance from the machine set gate of each group of machine sets to the ground in the middle of the cone pipe entrance door with the thickness of 999m and 1m of machine sets are triggered, only uploading flooding information to the public LCU; similarly, after the liquid level switch arranged at the position 0.5m from the ground of the 1002.5m technical water supply layer and the positions 0.5m and 1m from the ground of each group of units of the }. 999m unit No. 2 taper pipe entrance door is triggered, the flooding information is only uploaded to the LCU for the machine.

Specifically, the invention has 5 groups of hydroelectric generating sets, and 3 liquid level switches are arranged at the positions 1m away from the ground of the entrance of the 1 # taper pipe of the%999 m1 # 3 # 5 set. When the public LCU monitors any 2 liquid level switch signals which are arranged on the 985m tail water gallery layer and are 0.5m away from the ground, the public LCU sends out early warning signals; when the public LCU monitors any 2 liquid level switch signals which are arranged on the 985m tail water gallery layer and are 1m away from the ground, the public LCU outputs a first stop signal; when the public LCU monitors any 2 liquid level switch signals which are arranged at the entrance of the 1-cone pipe of the 999m < 1 >, 3 < 1 >, 5 < 5 > machine set and are 1m away from the ground, the public LCU outputs a second stop signal; and after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the emergency stop opening pressing plate in the public LCU is put in, and meanwhile, the public LCU opening stop signal is sent to the LCU of the 5 groups of units.

Preferably, the detection module of the flooded plant further comprises a network switch, the network switch is used for forming all the PLC monitoring systems into a ring network, all the PLC monitoring systems can communicate with each other, and the PLC monitoring systems send signals to the public LCU and the unit LCU through the network switch.

Preferably, an emergency stop opening pressing plate is also arranged in the unit LCU and used for regularly verifying the function of the flooded plant, so that the unit is not stopped.

In order to achieve the technical scheme, the emergency stop opening pressing plate is arranged on the unit LCU, so that the real action of the simulated liquid level switch can be met, the emergency stop flow can not be really started, and the normal opening of the emergency stop command of the system of the water flooded factory building is ensured when the function verification of the water flooded factory building is regularly carried out every year.

Preferably, the No. 2 taper pipe entrance doors of each group of units are not directly and horizontally communicated with the No. 1 taper pipe entrance corridor; the human entrance corridor of the vertebral canal number 1 of each group of units is horizontally communicated, and the technical water supply chambers of each group of units of the technical water supply layer of the 1002.5m technology are not directly horizontally communicated.

Through the technical scheme, the unit system can still normally operate and monitor under the condition that the single unit taper pipe entrance door is permeable, and cannot be influenced by the permeable unit.

Preferably, when the water accumulation height triggers 2 liquid level switches respectively arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and any 2 liquid level switches arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, after the PLC monitoring system performs three-out-of-two logic judgment, a shutdown command is issued to the units corresponding to the triggered liquid level switches, and the rest of units not triggered corresponding liquid level switches can continue to operate and monitor, and the units issued with the shutdown command are processed by technicians after confirming no water accumulation or water flooding factory building conditions; if any 2 liquid level switches corresponding to each group of units are triggered, after the PLC monitoring system performs three-out-of-two logic judgment, a shutdown command is issued to LCU of each group.

Early warning program execution module: and the detection module is connected with the flooding plant and is used for starting an emergency shutdown process after receiving the shutdown command of the public LCU to the machine LCU and when the shutdown command of the unit LCU is sent out, and closing a water inlet gate of the unit.

Preferably, after the public LCU shutdown command is started to the machine LCU, after any group of LCU shutdown commands are sent out, the early warning program execution module can start an emergency shutdown process, and the water inlet gate of the machine set is closed.

Early warning workstation module: the detection module is connected with the flooded plant and consists of a broadcast and a camera arranged above the 985m tail water gallery layer and at all positions in the plant, and is used for assisting a plant attendant to carry out video monitoring on the flooded condition of the plant in a monitoring room through the camera when receiving a water level high early warning signal sent by the flooded plant detection module, and immediately notifying the operator in the plant to carry out emergency evacuation through broadcast voice if the water leakage or the flooded condition in the plant is judged through the video monitoring; if the detection element is judged to be a false alarm signal through video monitoring, a maintainer is informed in time to check whether the detection element has faults or not.

Referring to fig. 4, the invention further provides a hydropower station flooding factory building early warning method:

s1: the water logging information collection comprises public LCU water logging information collection and unit LCU water logging information collection:

s11: the specific detection method for the public LCU flooding information acquisition comprises the following steps: 1 branch of liquid level meter is arranged on the 985m tail water gallery layer, 3 branches of liquid level switches are respectively arranged at the positions 0.5m and 1m away from the ground of the 985m tail water gallery layer, 3 branches of liquid level switches are also arranged at the positions 1m away from the ground of the unit gate of each unit in the middle of the 999m unit 1 taper pipe entrance door, and an emergency stop opening pressing plate are also arranged; the 1-branch liquid level meter arranged on the 985m tail water gallery layer is used for monitoring the height of accumulated water in the gallery in real time, and when the accumulated water height triggers any 2 of the 3-branch liquid level switches arranged on the 985m tail water gallery layer and 0.5m away from the ground, the PLC monitoring system performs three-out-two logic judgment and then sends out an early warning signal; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the 985m tail water gallery layer 1m away from the ground, the PLC monitoring system outputs a first shutdown signal after performing three-out-of-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the middle of the V999 m unit 1 taper pipe entrance door and 1m distance between the unit gate of each group of units and the ground, the PLC monitoring system outputs a second stop signal after performing three-out-two logic judgment; after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the public LCU is input by an emergency stop starting and stopping plate, and meanwhile, the public LCU starting and stopping signal is sent to LCUs of all units;

s12: the unit LCU flooding information acquisition method specifically comprises the following steps: 1 liquid level meter is arranged in each group of unit technology water supply chambers of the technical water supply layer of No. 1002.5m, 1 liquid level switch is arranged at the position of 0.5m of the technical water supply layer of No. 1002.5m from the ground, 1 liquid level switch is respectively arranged at the position 0.5m away from the ground of each group of units of the 999m2 conical pipe entrance door, and 2 liquid level switches are respectively arranged at the position 1m away from the ground of each group of units of the 999m2 conical pipe entrance door; when the height of the accumulated water triggers the liquid level switch which is arranged at the 999m2 taper pipe entrance and is 0.5m away from the ground, the PLC monitoring system sends out an early warning signal; when the height of accumulated water triggers any 2 of 2 liquid level switches arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and 1 liquid level switch arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, the PLC monitoring system starts a shutdown command after performing three-out-of-two logic judgment;

s2: executing an early warning program, wherein the public LCU stop command is started to the machine LCU, and simultaneously, after the machine set LCU stop command is sent out, an emergency stop flow is started, and a machine set water inlet gate is closed;

s3: after receiving the early warning signal sent by the early warning program judging system, assisting a plant attendant to carry out video monitoring on the water flooding condition of the plant in a monitoring room through a camera, and immediately notifying the operator in the plant of emergency evacuation through broadcast voice if the water leakage or the water flooding condition in the plant is judged through video monitoring; if the detection element is judged to be a false alarm signal through video monitoring, a maintainer is informed in time to check whether the detection element has faults or not.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims (9)

1. The utility model provides a hydropower station flooding factory building early warning system, includes flooding factory building detection module, early warning program execution module, early warning workstation module, the flooding factory building detection module divide into public LCU and unit LCU, public LCU with communicate through network equipment between the unit LCU, the flooding factory building detection module includes a plurality of PLC monitored control system, level gauge, liquid level switch, emergency stop and open clamp plate and the host computer server of constituteing looped netowrk intercommunication, PLC monitored control system set up in the unit LCU, the level gauge with liquid level switch sets up in relevant layer, relevant layer is 985m tail water corridor layer, 999m unit No. 1 taper pipe business turn over door, 999m unit No. 2 taper pipe business turn over door and water supply 1002.5m technical layer, the level gauge is used for monitoring relevant layer ponding real-time altitude, emergency stop and open clamp plate set up in public LCU, its characterized in that:

the water logging factory building detection module is used for detecting water logging information of the relevant layer in the factory building, after the liquid level switch is triggered by rising of the water of the relevant layer, the liquid level switch uploads the rising information of the water in the factory building to the PLC monitoring system, the PLC monitoring system sends a water level high early warning signal or a water level high stop signal to the public LCU or the unit LCU through a logic judgment method, and the logic judgment process of the PLC monitoring system is displayed through the upper computer server and stored in the upper computer server;

early warning program execution module: the detection module is connected with the flooding plant and is used for starting an emergency shutdown process after receiving the public LCU shutdown command to the machine LCU and when the unit LCU shutdown command is sent out, and closing a unit water inlet gate;

early warning workstation module: the detection module is connected with the flooded plant and consists of a broadcast and a camera arranged above the 985m tail water gallery layer and at all positions in the plant, and is used for assisting a plant attendant to carry out video monitoring on the flooded condition of the plant in a monitoring room through the camera when receiving a water level high early warning signal sent by the flooded plant detection module, and immediately notifying the operator in the plant to carry out emergency evacuation through broadcast voice if the water leakage or the flooded condition in the plant is judged through the video monitoring; if the detection element is judged to be a false alarm signal through video monitoring, a maintainer is informed in time to check whether the detection element has faults or not.

2. The hydropower station flooding plant early warning system of claim 1, wherein the liquid level meter and the liquid level switch are floating balls, signal transmission is carried out between the liquid level meter, the liquid level switch and the PLC monitoring system through hard cable wires, and the PLC monitoring system and the upper computer server are communicated through network equipment.

3. The hydropower station flooding plant early warning system of claim 2, wherein the public LCU is used for detecting the lowest point of a relevant layer of the plant, and the public LCU detection flooding information program is as follows: 1 branch of liquid level meter is arranged on the 985m tail water corridor layer, 3 branches of liquid level switches are respectively arranged at the positions 0.5m and 1m away from the ground of the 985m tail water corridor layer, 3 branches of liquid level switches are also arranged at the position 1m away from the ground of the unit gate of each unit in the middle of the No. 1 taper pipe entrance door of the 999m unit, and liquid level switch quantity signals and liquid level meter analog quantity signals are sent into the public LCU through cables; when the height of accumulated water triggers any 2 of the 3 liquid level switches which are arranged at the 985m tail water gallery layer and 0.5m away from the ground, the PLC monitoring system sends out an early warning signal after performing three-out-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the 985m tail water gallery layer 1m away from the ground, the PLC monitoring system outputs a first shutdown signal after performing three-out-of-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the middle of the V999 m unit 1 taper pipe entrance door and 1m distance between the unit gate of each group of units and the ground, the PLC monitoring system outputs a second stop signal after performing three-out-two logic judgment; after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the public LCU is input by an emergency stop starting and stopping plate, and meanwhile, the public LCU starting and stopping signal is sent to LCUs of all units;

the unit LCU is used for observing water accumulation conditions of water supply layers of single unit technologies and helping technicians judge water flooding factory building conditions, and the unit LCU detects water flooding information programs as follows: 1 liquid level meter is arranged in each group of unit technology water supply chambers of the technical water supply layer 1002.5m, 1 liquid level switch is arranged at the position 0.5m away from the ground of the technical water supply layer 1002.5m, 1 liquid level switch is respectively arranged at the position 0.5m away from the ground of each group of units of the step-up 999m unit No. 2 taper pipe entrance door, 2 liquid level switches are respectively arranged at the position 1m away from the ground of each group of units of the step-up 999m unit No. 2 taper pipe entrance door, and liquid level switch quantity signals and liquid level meter analog quantity signals are sent into the unit LCU through cables; when the height of the accumulated water triggers the liquid level switch which is arranged at the 999m2 taper pipe entrance and is 0.5m away from the ground, the PLC monitoring system sends out an early warning signal; when the height of accumulated water triggers 2 liquid level switches arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and any 2 liquid level switches arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, the PLC monitoring system starts a shutdown command after performing three-out-of-two logic judgment.

4. The warning system of a hydropower station flooding plant according to claim 3, wherein the detection module of the flooding plant further comprises a network switch, the network switch is used for forming all PLC monitoring systems into a ring network, all the PLC monitoring systems can communicate with each other, and the PLC monitoring systems send signals to the public LCU and the unit LCU through the network switch.

5. The hydropower station flooding plant early warning system of claim 4, wherein emergency shutdown opening pressing plates are also arranged in the unit LCU and are used for periodically verifying the flooding plant functions without causing non-stop of the unit.

6. The hydropower station flooding plant early warning system according to claim 5, wherein the No. 2 taper pipe entrance doors of each group are not directly and horizontally communicated with the No. 1 taper pipe entrance corridor; the human entrance corridor of the vertebral canal number 1 of each group of units is horizontally communicated, and the technical water supply chambers of each group of units of the technical water supply layer of the 1002.5m technology are not directly horizontally communicated.

7. The hydropower station flooding plant early warning system according to claim 6, wherein when the accumulated water height triggers 2 liquid level switches respectively arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and any 2 liquid level switches arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, after the PLC monitoring system performs three-out-of-two logic judgment, a shutdown command is started for the units corresponding to the triggered liquid level switches, the rest of units not triggered corresponding liquid level switches can continue to operate and monitor, and the units started with the shutdown command are processed by a technician after confirming the condition of no accumulated water or flooding of the plant; if any 2 liquid level switches corresponding to each group of units are triggered, after the PLC monitoring system performs three-out-of-two logic judgment, a shutdown command is issued to LCU of each group.

8. The hydropower station flooding plant early warning system of claim 7, wherein after the public LCU stop command is started to the machine LCU, the early warning program execution module can start an emergency stop flow after any group of LCU stop commands are sent out, and a water inlet gate of the machine set is closed.

9. A hydropower station flooding factory building early warning method is characterized by comprising the following steps of:

s1: the water logging information collection comprises public LCU water logging information collection and unit LCU water logging information collection:

s11: the specific detection method for the public LCU flooding information acquisition comprises the following steps: 1 branch of liquid level meter is arranged on the 985m tail water gallery layer, 3 branches of liquid level switches are respectively arranged at the positions 0.5m and 1m away from the ground of the 985m tail water gallery layer, 3 branches of liquid level switches are also arranged at the positions 1m away from the ground of the unit gate of each unit in the middle of the 999m unit 1 taper pipe entrance door, and an emergency stop opening pressing plate are also arranged; the 1-branch liquid level meter arranged on the 985m tail water gallery layer is used for monitoring the height of accumulated water in the gallery in real time, and when the accumulated water height triggers any 2 of the 3-branch liquid level switches arranged on the 985m tail water gallery layer and 0.5m away from the ground, the PLC monitoring system performs three-out-two logic judgment and then sends out an early warning signal; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the 985m tail water gallery layer 1m away from the ground, the PLC monitoring system outputs a first shutdown signal after performing three-out-of-two logic judgment; when the height of accumulated water triggers any 2 of the 3 liquid level switches arranged at the middle of the V999 m unit 1 taper pipe entrance door and 1m distance between the unit gate of each group of units and the ground, the PLC monitoring system outputs a second stop signal after performing three-out-two logic judgment; after the public LCU is simultaneously connected to the first stop signal and the second stop signal, the public LCU is input by an emergency stop starting and stopping plate, and meanwhile, the public LCU starting and stopping signal is sent to LCUs of all units;

s12: the unit LCU flooding information acquisition method specifically comprises the following steps: 1 liquid level meter is arranged in each group of unit technology water supply chambers of the technical water supply layer of No. 1002.5m, 1 liquid level switch is arranged at the position of 0.5m of the technical water supply layer of No. 1002.5m from the ground, 1 liquid level switch is respectively arranged at the position 0.5m away from the ground of each group of units of the 999m2 conical pipe entrance door, and 2 liquid level switches are respectively arranged at the position 1m away from the ground of each group of units of the 999m2 conical pipe entrance door; when the height of the accumulated water triggers the liquid level switch which is arranged at the position of the 999m1 taper pipe entrance and is 0.5m away from the ground, the PLC monitoring system sends out an early warning signal; when the height of accumulated water triggers any 2 of 2 liquid level switches arranged at the position 1m away from the ground of each group of units of the 999m2 taper pipe entrance door and 1 liquid level switch arranged at the position 0.5m away from the ground of the 1002.5m technical water supply layer, the PLC monitoring system starts a shutdown command after performing three-out-of-two logic judgment;

s2: executing an early warning program, wherein the public LCU stop command is started to the machine LCU, and simultaneously, after the machine set LCU stop command is sent out, an emergency stop flow is started, and a machine set water inlet gate is closed;

s3: after receiving the early warning signal sent by the early warning program judging system, assisting a plant attendant to carry out video monitoring on the water flooding condition of the plant in a monitoring room through a camera, and immediately notifying the operator in the plant of emergency evacuation through broadcast voice if the water leakage or the water flooding condition in the plant is judged through video monitoring; if the detection element is judged to be a false alarm signal through video monitoring, a maintainer is informed in time to check whether the detection element has faults or not.

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