CN112556782A - Water diversion type power station reservoir water level measuring device, water level calculating method and system - Google Patents
Water diversion type power station reservoir water level measuring device, water level calculating method and system Download PDFInfo
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- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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Abstract
The invention discloses a water diversion type power station reservoir water level measuring device, a water level calculating method and a water diversion type power station reservoir water level calculating system, wherein the device comprises a workstation, a data processing system, a signal acquisition device, a server and a database; workstation and server are through first control connection communication connection, the server passes through third communication link with the dam pivot and is connected, the server passes through second communication link with the factory building pivot and is connected, the server passes through first communication link with data processing system and is connected, signal acquisition device passes through second control connection communication connection with the factory building pivot, signal acquisition device and data processing system read the port through the second and are connected, the server reads the port through first data with the database and is connected. According to the invention, under the conditions of sensor failure, communication interruption and the like, an operator on duty at a remote control center can master dam water level information in real time, and decision support is provided for control of total station equipment.
Description
Technical Field
The invention relates to the technical field of reservoir water level measurement, in particular to a water diversion type power station reservoir water level measurement device, a water level calculation method and a water level calculation system.
Background
The water diversion type hydropower station is a hydropower station which utilizes a water diversion channel with gentle slope to divert water from a river section with steep slope and concentrated fall and a river bay or a place with larger difference of height of two adjacent river beds so as to form a fall (water head) meeting the requirement with the natural water surface for generating power. The main building of the diversion type hydropower station can be divided into a head junction, a diversion system and a plant junction according to the position and the application. The head hub mainly comprises a dam, a gate and the like, is provided with a certain number of water level sensors and industrial television cameras and is used for monitoring the upstream water level.
At present, along with increasingly prominent climate problems, rainfall in partial areas is obviously increased in the past year, debris flow disasters are easily caused, and road bridges are washed out, for a diversion type hydropower station, because a dam is far away from a factory building, the dam water level information is generally transmitted to a factory building control center (namely a common remote control center) by line communication, when the debris flow disasters occur, the communication between the dam and the remote control center is generally interrupted, operators of the remote control center cannot master the dam water level information in real time, and if a gate is lifted and water is drained, a unit is shut down, and the upstream water level is unchanged, economic losses are caused; if the power is normally generated, no measures are taken, and upstream water is increased, so that dam overflow is caused, and equipment loss is caused. Therefore, there is a need for a new measuring device and system that can independently measure the upstream water level without relying on the dam water level sensor and communication system, and provide decision support for the operator on duty in case of communication loss.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a diversion type power station reservoir water level measuring device, a water level calculating method and a water level calculating system, which aim to enable a remote control center attendant to master dam water level information in real time under the conditions of sensor failure, communication interruption and the like under the condition that the dam water level is obtained in real time without depending on a dam water level sensor, industrial television monitoring and a communication system, and provide decision support for total station equipment control.
In order to achieve the purpose, the invention adopts the following technical scheme: a water diversion type power station reservoir water level measuring device comprises a workstation, a data processing system, a signal acquisition device, a server and a database; workstation and server are through first control connection communication connection, the server passes through third communication link with the dam pivot and is connected, the server passes through second communication link with the factory building pivot and is connected, the server passes through first communication link with data processing system and is connected, signal acquisition device passes through second control connection communication connection with the factory building pivot, signal acquisition device and data processing system read the port through the second and are connected, the server reads the port through first data with the database and is connected.
As a further description of the above technical solution:
the dam pivot is connected with the plant pivot through a diversion system.
As a further description of the above technical solution:
the first communication link is provided with a switch set, a normally closed contact and a first intermediate relay, and the switch set and the normally closed contact are connected with the first intermediate relay in series.
As a further description of the above technical solution:
and a second intermediate relay is arranged on the third communication link and is connected with the switch set, the normally closed contact and the first intermediate relay in parallel.
A method for calculating the reservoir water level of a water diversion type power station comprises the following steps:
s1: reading whether a bottom database stores a trained model or not;
s2: if so, reading data of the signal acquisition device, wherein the data comprises the water level of the surge shaft, the front and rear pressures of the water inlet valve, the output of the unit and the tail water level;
s3: starting a water level calculation module to calculate the dam water level according to the model and the data;
s4: and whether convergence is carried out or not, and if yes, a calculation result is output.
As a further description of the above technical solution:
in the step S2, if not, first reading basic data, where the basic data includes five parameters, such as dam water level, surge shaft water level, front and rear pressure of a water inlet valve, unit output, tail water level, and the like; and then training the basic data to obtain a mathematical model of the dam water level and parameters.
As a further description of the above technical solution:
in the step S4, if not, the process returns to the step S2.
A water-diversion-type power station reservoir water level calculation system, comprising:
the basic data reading module is used for reading whether the bottom database stores a trained model or not;
the signal acquisition and reading module is used for reading the data of the signal acquisition device;
the water level calculation module is used for starting to calculate the dam water level according to the model and the data;
and the output module is used for outputting the calculation result.
The invention has the following beneficial effects:
the device and the system for acquiring the dam water level in real time without depending on a dam water level sensor, industrial television monitoring and a communication system can enable a remote control center attendant to master dam water level information in real time under the conditions of sensor failure, communication interruption and the like, and provide decision support for total station equipment control.
Drawings
FIG. 1 is a schematic connection diagram of a diversion-type power station reservoir water level measuring device disclosed by the invention;
FIG. 2 is a schematic diagram of a third communication link being mutually exclusive with a first communication link;
FIG. 3 is a flow chart of a method for calculating reservoir water level of a water diversion type power station, which is disclosed by the invention;
fig. 4 is a computational schematic diagram of a neural network for a forward propagation algorithm.
Reference numerals: 1-a workstation; 2-a first control link; 3-a second control link; 4-a data processing system; 5-a database; 6-a first communication link; 7-a second communication link; 8-a third communication link; 9-a server; 10-a first data read port; 11-a second data read port; 12-a set of switches; 13-a normally closed contact; 14-a first intermediate relay; 15-second intermediate relay.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a diversion type power station reservoir water level measuring device comprises a workstation, a data processing system, a signal acquisition device, a server and a database; the workstation is in communication connection with the server through a first control connection, the server is connected with the dam junction through a third communication link, the server is connected with the plant junction through a second communication link, the server is connected with the data processing system through the first communication link, the signal acquisition device is in communication connection with the plant junction through a second control connection, the signal acquisition device is connected with the data processing system through a second data reading port, and the server is connected with the database through a first data reading port; the dam pivot is connected with the plant pivot through a diversion system.
Under normal conditions, the second control link 3, the data processing system 4, the first communication link 6, the second data reading port 11 and the information acquisition device do not work, all data of the dam junction are transmitted to the server 9 through the third communication link 8, the server 9 stores the data in the database 5 after receiving the data, when a workstation needs to acquire dam data, a data reading command is firstly sent to the server 9, the server 9 reads corresponding data in the database 5 after receiving the command and returns the corresponding data to the server 9, and the server 9 returns the data to the workstation 1, so that a data reading process is completed. Similarly, when the remote control center needs to operate the dam gate, the command is sent to the server 9 through the first control link 2, and the server 9 sends the command to the PLC of the Local Control Unit (LCU) of the dam junction through the third communication link 8, so that the gate is controlled. When the dam water level acquisition sensor fails to send data to the server 9 due to a fault or the disconnection of the third communication link 8, the second control link 3, the data processing system 4, the first communication link 6, the second data reading port 11 and the information acquisition device are automatically started to start dam water level acquisition and calculation. The mutual exclusion function is realized between the third communication link 8 and the second control link 3, the data processing system 4, the first communication link 6, the second data reading port 11 and the information acquisition device through a group of intermediate relay normally closed contacts, as shown in fig. 2.
As shown in fig. 2, the first communication link 6 is provided with a switch set 12, a normally closed contact 13 and a first intermediate relay 14, wherein the switch set 12, the normally closed contact 13 and the first intermediate relay 14 are connected in series; and a second intermediate relay 15 is arranged on the third communication link 8, and the second intermediate relay 15 is connected with the switch set 12, the normally closed contact 13 and the first intermediate relay 14 in parallel.
When the third communication link 8 is working normally, the second intermediate relay 15 is turned on, its normally closed contact 13 port, the operation power supply circuit of the first communication link 6 is turned off, and the first intermediate relay 14 is not energized. When the dam water level sensor has a fault or a communication fault, the third communication link 8 is disconnected, the second intermediate relay 15 loses power, the normally closed contact of the second intermediate relay resets, the first intermediate relay 14 is connected, and the first communication link 6 is started, so that the automatic starting function of the first communication link 6 after the third communication link 8 is disconnected is realized.
When the dam communication is interrupted, the device and the software are automatically started, the information acquisition device starts to acquire real-time factory building data, mainly including the water level of the surge shaft (if any), the front and back pressure of the water inlet valve, the output of a unit and the tail water level, and starts to automatically calculate the dam water level. The flow chart of the water level calculation software is shown in fig. 3.
A method for calculating the reservoir water level of a water diversion type power station comprises the following steps:
s1: reading whether a bottom database stores a trained model or not;
s2: if so, reading data of the signal acquisition device, wherein the data comprises the water level of the surge shaft, the front and rear pressures of the water inlet valve, the output of the unit and the tail water level;
s3: starting a water level calculation module to calculate the dam water level according to the model and the data;
s4: and whether convergence is carried out or not, and if yes, a calculation result is output.
In some embodiments, in the step S2, if no, basic data is first read, where the basic data includes five parameters, such as dam water level, surge shaft water level, water inlet valve front-back pressure, unit output force, tail water level, and the like; and then training the basic data to obtain a mathematical model of the dam water level and parameters.
In some embodiments, in the step S4, if no, the step S2 is executed in return.
A water-diversion-type power station reservoir water level calculation system, comprising:
the basic data reading module is used for reading whether the bottom database stores a trained model or not;
the signal acquisition and reading module is used for reading the data of the signal acquisition device;
the water level calculation module is used for starting to calculate the dam water level according to the model and the data;
and the output module is used for outputting the calculation result.
After the system is started, whether a trained model is stored in a bottom database or not is firstly read, and if the data is not trained in advance, the data needs to be read for training when a program is started. The data training algorithm adopted by the system is a forward propagation algorithm neural network fitting mode, and the calculation principle of the forward propagation algorithm neural network is shown in figure 4.
When calculating the value of the node w, the weighting and operation are performed through the nodes i, j, k and the like of the previous layer and the corresponding connection weights, a bias term (omitted in the figure for simplicity) is added to the final result, and finally, a nonlinear function (namely, an activation function) such as ReLu, sigmoid and the like is used, and the final result is the output of the node w of the layer.
Finally, the output layer result is obtained through continuous layer-by-layer operation by the method.
For forward propagation, no matter how high the dimension is, the process can be expressed by the following formula:
a2＝σ(z2)＝σ(a1*W2+b2)a^2＝\sigma(z^2)＝\sigma(a^1*W^2+b^2)a2＝σ(z2)＝σ(a1*W2+b2)
wherein, the superscript represents the layer number, the asterisk represents convolution, b represents the bias term bias, and sigma \ sigma represents the activation function.
The dam water level and the surge shaft water level, the front and back pressures of the water inlet valve, the unit output force, the tail water level and other five parameters are trained to obtain a mathematical model of the dam water level and the parameters, and when the dam water level is calculated, the dam water level can be calculated through the trained mathematical model only by inputting the corresponding parameters, and the method is completely independent of a dam water level sensor.
The device and the system for acquiring the dam water level in real time without depending on a dam water level sensor, industrial television monitoring and a communication system can enable a remote control center attendant to master dam water level information in real time under the conditions of sensor failure, communication interruption and the like, and provide decision support for total station equipment control. .
Finally, it should be noted that: 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 or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a diversion formula power station reservoir water level measurement device which characterized in that: the system comprises a workstation, a data processing system, a signal acquisition device, a server and a database; workstation and server are through first control connection communication connection, the server passes through third communication link with the dam pivot and is connected, the server passes through second communication link with the factory building pivot and is connected, the server passes through first communication link with data processing system and is connected, signal acquisition device passes through second control connection communication connection with the factory building pivot, signal acquisition device and data processing system read the port through the second and are connected, the server reads the port through first data with the database and is connected.
2. The diversion-type power station reservoir water level measurement device of claim 1, characterized in that: the dam pivot is connected with the plant pivot through a diversion system.
3. The diversion-type power station reservoir water level measurement device of claim 1, characterized in that: the first communication link is provided with a switch set, a normally closed contact and a first intermediate relay, and the switch set and the normally closed contact are connected with the first intermediate relay in series.
4. The diversion-type power station reservoir water level measurement device of claim 3, characterized in that: and a second intermediate relay is arranged on the third communication link and is connected with the switch set, the normally closed contact and the first intermediate relay in parallel.
5. A method for calculating reservoir water level of a water diversion type power station is characterized by comprising the following steps: the method comprises the following steps:
s1: reading whether a bottom database stores a trained model or not;
s2: if so, reading data of the signal acquisition device, wherein the data comprises the water level of the surge shaft, the front and rear pressures of the water inlet valve, the output of the unit and the tail water level;
s3: starting a water level calculation module to calculate the dam water level according to the model and the data;
s4: and whether convergence is carried out or not, and if yes, a calculation result is output.
6. The method for calculating the reservoir water level of the water-diversion power station according to claim 5, wherein the method comprises the following steps: in the step S2, if not, first reading basic data, where the basic data includes five parameters, such as dam water level, surge shaft water level, front and rear pressure of a water inlet valve, unit output, tail water level, and the like; and then training the basic data to obtain a mathematical model of the dam water level and parameters.
7. The method for calculating the reservoir water level of the water-diversion power station according to claim 5, wherein the method comprises the following steps: in the step S4, if not, the process returns to the step S2.
8. The utility model provides a diversion type power station reservoir water level calculation system which characterized in that includes:
the basic data reading module is used for reading whether the bottom database stores a trained model or not;
the signal acquisition and reading module is used for reading the data of the signal acquisition device;
the water level calculation module is used for starting to calculate the dam water level according to the model and the data;
and the output module is used for outputting the calculation result.
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