A pumped storage monitoring data management system and method based on wireless transmission

Abstract

This invention discloses a pumped storage monitoring data management system and method based on wireless transmission, belonging to the field of pumped storage monitoring technology. The invention includes a multi-array data monitoring module, a multi-type data storage module, a multi-data analysis module, and a mode control center. The multi-array data monitoring module monitors and collects data on reservoir water levels, water pipelines, and generator sets. The multi-type data storage module transmits and receives the collected data via optical fiber and stores it in a categorized manner. The multi-data analysis module analyzes the collected water level, pipeline, and generator set data. The mode control center performs corresponding control operations based on the data analysis results. This invention monitors and analyzes reservoir data and grid load demand to flexibly allocate water pipelines to meet continuous and stable power supply.

Description

Technical Field

[0001] This invention relates to the field of pumped storage monitoring technology, specifically to a pumped storage monitoring data management system and method based on wireless transmission. Background Technology

[0002] Pumped storage is an energy storage technology that uses water as an energy storage medium to store and manage electrical energy through the mutual conversion of electrical energy and potential energy. Specifically, during periods of low electricity load, water is pumped from a lower reservoir to an upper reservoir using electrical energy. During periods of high electricity load, water is released from the upper reservoir to convert potential energy into electrical energy for power generation. Pumped storage is suitable for frequency and phase regulation, stabilizing the frequency and voltage of the power system, and can also improve the efficiency of thermal and nuclear power plants in the system.

[0003] Currently, pumped storage power generation technology is relatively mature. When there is high load demand, it converts the potential energy of water at higher locations to meet the electricity demand; when there is low load demand, it pumps water from lower locations to higher locations to store energy. Through this mode, it can flexibly meet various grid demands. However, this mode is highly dependent on the water content of the reservoir. If the water storage is insufficient, it will lead to instability in the continuous power generation and transmission of this power generation mode. Therefore, this power generation mode is relatively fixed and cannot be changed in response to dynamic changes in water volume. Summary of the Invention

[0004] The purpose of this invention is to provide a pumped storage monitoring data management system and method based on wireless transmission, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A pumped storage monitoring and data management system based on wireless transmission, comprising a multi-array data monitoring module, a multi-type data storage module, a multi-data analysis module, and a mode control center;

[0007] The multi-array data monitoring module is used to monitor and collect data on the water level of the upper reservoir, the water conveyance pipeline, and the generator set; the multi-type data storage module is used to transmit and receive the collected data through optical fiber and store it in a categorized manner; the multi-data analysis module analyzes the collected water level data, pipeline data, and generator set data; and the mode control center performs corresponding control operations based on the data analysis results.

[0008] The multi-array data monitoring module is connected to the multi-type data storage module; the multi-data analysis module is connected to the multi-type data storage module; the multi-data analysis module is connected to the model control center; and the model control center is connected to the multi-type data storage module.

[0009] The multi-array data monitoring module includes a water level monitoring unit, a pipeline monitoring unit, and a generator set monitoring unit. The water level monitoring unit measures the water level change of the upper reservoir and the cross-sectional area of ​​the bottom of the reservoir using a water level gauge. The pipeline monitoring unit collects data on the cross-sectional area of ​​the water transmission pipeline. The generator set monitoring unit collects data on the load power demand and transmission time of the power grid.

[0010] The multi-type storage module includes an optical transmission unit and a classification storage unit. The optical transmission unit uses a laser as a light source and transmits data using the light waves output by modulating the laser. At the receiving end, the optical signal is received by an optical receiver and converted into an electrical signal. Here, the light waves output by the modulated laser are transmitted through the optical fiber. During the fiber optic laying process, fiber optic rotary connectors are needed at the fiber optic connection points. Currently, the structures of fiber optic rotary connectors are mainly divided into direct-connection type and optical lens beam-expanding type. The direct-connection type design is used in this invention, which mainly involves direct coupling between optical fibers. The classification storage unit classifies the received data using a clustering algorithm and stores it separately according to the classification results.

[0011] The multi-data analysis module includes a reservoir water level data analysis unit, a water conveyance pipeline data analysis unit, and a load demand data analysis unit. The reservoir water level data analysis unit analyzes water storage by combining the water level changes during the power generation process of the upper reservoir with the bottom cross-sectional area data of the reservoir. The water conveyance pipeline data analysis unit analyzes the optimal flow cross-sectional area of ​​the pipeline and the flow velocity of the water for different storage quantities and grid load demands. The load demand data analysis unit analyzes the grid load demand and calculates the required power transmission capacity, transmission time, and pumping power demand of the generator set based on the load demand.

[0012] The mode control center includes a water conveyance pipeline control unit and a power generation and energy storage control unit. The water conveyance pipeline control unit adjusts the cross-sectional area of ​​the pipeline based on the pipeline data analysis results to control the water flow rate through the pipeline. The power generation and energy storage control unit is used to adjust the working mode of the system according to the grid load demand. When the grid load demand is high, the system generates electricity; when the grid load demand is low, the system pumps water for energy storage.

[0013] A method for managing pumped storage monitoring data based on wireless transmission, the method comprising the following steps:

[0014] S100: Equipment data monitoring and collection are carried out by installing equipment on the upper reservoir, water pipeline and generator set of the pumped storage power station.

[0015] S200: The collected data is transmitted via light waves, and the received data is classified and stored.

[0016] S300. Analyze the power grid load demand, and combine the power grid load demand and the status data of the power storage station to analyze the reservoir water level, pipeline water flow and velocity, and the power generation and power generation time of the generator set.

[0017] S400 and the mode control center coordinate and control the pumped storage system based on data analysis results.

[0018] The specific steps for monitoring and collecting equipment data in S100 by installing equipment on the upper reservoir, water pipeline, and generator unit of the pumped storage power station are as follows:

[0019] S101. The working status of the pumped storage power station is monitored by installing monitoring equipment in the upper reservoir, lower reservoir, water pipeline and generator set sections.

[0020] S102. Measure the height difference between the upper and lower reservoirs using a GPS measuring instrument; measure the water level data of the upper reservoir using a water level gauge; obtain three-dimensional data of the bottom of the reservoir using a laser scanner, and calculate the bottom cross-sectional area of ​​the reservoir and the cross-sectional area when the pipeline is fully open based on the data; obtain the planned power generation demand of the corresponding pumped storage power station by the power grid load allocation through the connection terminal between the power station and the power grid.

[0021] The specific steps in S200 for transmitting the collected data via light waves, classifying the received data, and storing it are as follows:

[0022] S201. The collected data is converted into light waves and transmitted through a laser source installed on and connected to the monitoring equipment; a receiver is installed at the management terminal at the power plant end to receive the transmitted light waves and convert the data.

[0023] S202. The collected data, analysis data, and control data are finely divided using clustering algorithms, and the data are stored independently in different regions based on the classification results.

[0024] The specific steps in S300 for analyzing grid load demand, and combining grid load demand and the status data of the storage power station to analyze reservoir water level, pipeline water flow and velocity, and generator power generation and generation time are as follows:

[0025] S301. Obtain the current power generation demand plan E of the power plant through the power plant-grid connection terminal. pq and planned transmission time T pq According to the formula Calculate the average flow velocity of water in the pipeline from the upper reservoir; where g is the acceleration due to gravity and H is the height difference between the upper and lower reservoirs; calculate the flow velocity using the conversion formula between potential energy and kinetic energy; and use the formula... Calculate the average flow rate when the water pipeline is fully open; where A is the cross-sectional area of ​​the pipeline when fully open; using the formula... Calculate the required water volume during the planned power generation period when the water pipeline is fully open; using the formula m pq =ρ*V pq Calculate the required water mass for the pipeline to be fully open within the planned time period; where ρ is the density of water in the reservoir; according to the formula E′ pq =m pq gH*ε calculates the actual power generation of the power plant under the condition of full pipeline opening within the planned time; where ε is the power generation efficiency of the generator set. In this invention, fiber optic grating sensors are installed on the generator set to monitor the temperature of the generator rotor, stator, bearings, etc. in real time, ensuring the real-time operating status of the internal parts of the generator set and enabling timely adjustment of abnormal data, thereby ensuring that the generator set maintains a high power generation efficiency for a long time. The fiber optic grating sensor has advantages such as intrinsic safety, high voltage resistance, immunity to electromagnetic interference, high reliability, small size, and distributed operation. In addition, considering the insulation problems caused by humidity and dirt in the generator's test environment, a temperature sensor encapsulated in ceramic material and a high-voltage Teflon transmission fiber are networked to ensure the stability and reliability of sensor monitoring and data transmission. E pq With E′ pq The magnitudes are compared, and a secondary analysis is performed based on the comparison results. First, the planned data allocated by the power grid is calculated based on the current maximum power generation capacity of the power station to determine whether the planned power generation amount can be completed within the planned power generation time.

[0026] Fiber Bragg grating (FBG) sensors utilize wavelength modulation for sensing, making them intrinsic sensors. Therefore, in addition to the general characteristics of fiber optic sensors such as electrical insulation and electromagnetic interference resistance, they also feature wavelength encoding, ease of multiplexing and networking, and resistance to intensity noise. FBGs are inherently sensitive to changes in temperature and strain; thus, fiber optic stress-strain sensors and fiber optic temperature sensors made from FBGs have become direct applications in the field of fiber optic sensing. However, by encapsulating FBGs and utilizing the encapsulation structure to convert the measured quantity into a change in temperature or strain, the sensing of other physical quantities, such as concentration, refractive index, electromagnetic field, and acceleration, can be achieved. Based on the periodic structure and refractive index modulation characteristics, FBGs can be classified into uniform FBGs and non-uniform FBGs, with uniform FBGs further including FBGs and LPFGs. FBGs are more commonly used in wavelength-modulated fiber optic temperature sensors. While there are many methods for implementing FBG temperature sensing, most methods require the integration of multiple numerical calculations or the design of multiple sensing components, resulting in high costs and technical requirements. To address the interaction between stress and temperature on fiber Bragg gratings (FBGs), this project will design a novel structural scheme employing a dual-material cantilever beam structure. By optimizing the detector and dispensing process, a better solution for a dual-material FBG vibration-sensitive temperature sensor will be obtained. Compared to existing sensor structures, this scheme is simpler, easier to manufacture, and offers higher measurement accuracy, demonstrating broad application prospects. This project researches the application of a dual-material FBG vibration-sensitive temperature sensor in large-scale equipment for measuring temperature changes. The sensor can eliminate noise caused by vibration, thus providing a more accurate measurement of actual temperature variations.

[0027] S302, if E pq >E′ pq If the power plant cannot meet the power generation requirements at its maximum capacity within the planned time, then the power grid's allocation plan is incorrect; if E pq ≤E′ pq The formula for calculating the current available water volume of the upper reservoir is V. ft = (h2-h0)*A 库 Where h2 is the current upper reservoir water level, h0 is the critical water level for reservoir protection, and A 库 Let m be the cross-sectional area at the bottom of the reservoir; using the formula m ft =ρ*V ft Calculate the current usable water mass in the upper reservoir; according to formula E ft =m ft gH*ε calculates the power generation from the stored water in the upper reservoir; if E ft >E pqIf the current water storage in the upper reservoir is sufficient, then power generation will proceed according to the planned power generation volume and time allocated by the power grid; if E ft <E pq If the current water storage capacity of the upper reservoir is insufficient, the feedback power distribution cannot be completed. Therefore, while transferring water, the cross-sectional area of ​​the water transmission pipeline should be reduced; this can be achieved through the formula... Calculate the pipe cross-sectional area A0 to reduce it to meet the power generation time requirement; using the formula The rate of decrease in the pipe's cross-sectional area is calculated. First, if the current power plant's maximum generating capacity can meet the grid's planned output, then the current generating capacity is calculated to ensure it meets the planned output. If the existing water storage is sufficient, power generation continues as normal. If not, the planned output cannot be achieved; then, the control center is first notified that the planned output cannot be fulfilled. Next, the cross-sectional area of ​​the pipe gradually decreases during water transport to determine if it meets the planned power generation time. The final pipe cross-sectional area that meets the plan is calculated, and the pipe contraction rate is determined. This process ensures that the current power plant achieves its maximum generating capacity while simultaneously fulfilling the planned power generation time.

[0028] S303. By retrieving the monitoring data of the generator set, taking the generator set's power W and start-up time t, then according to formula E... 启 =W*t calculates the energy required to start the generator set; using the formula Calculate the mass of water required to start the generator set; the mass calculated here using the potential energy formula is in kilograms, which needs to be converted to tons for subsequent calculations; according to the formula... Calculate the cross-sectional area of ​​the water supply pipeline required for generator set startup, then let A be the cross-sectional area of ​​the pipeline. 启 Let A0 be the threshold value for the minimum cross-sectional area of ​​the water pipeline; then A0∈[A 启 If A0≥A], 启 If the feedback generation time is satisfied, it is recorded as the second feedback result; if there exists A0 < A 启 Then the cross-sectional area of ​​the pipe is reduced to a minimum of A. 启 If the power generation time cannot be met according to the feedback from the mode control center, it is recorded as the third feedback result. The energy required for the generator set to start under the kinetic energy transmitted by the water flow is calculated, and the minimum water conveyance cross-sectional area of ​​the pipeline is calculated in reverse. This value is used as a threshold to compare with the final cross-sectional area calculated above. If the calculated value is greater than the threshold, the planned power generation time can be completed. If the calculated value is less than the threshold, the calculated value is replaced by the threshold, and feedback is given that the planned power generation time cannot be completed. Power generation stops when the water storage in the upper reservoir reaches the critical value.

[0029] The specific steps taken by the S400 model control center to coordinate and control the pumped storage system based on data analysis results are as follows:

[0030] S401. The mode control center determines whether feedback information is received. If no feedback information is received, the power generation process proceeds normally according to the plan. If feedback information is received, the power station is controlled according to the specific feedback content. If the feedback result is an error in the allocation plan, a reallocation request is sent to the grid terminal. If the feedback result is that the planned power generation cannot be met but the power generation time can be met, the cross-sectional area of ​​the water conveyance pipeline is reduced according to the pipeline data analysis results to meet the power generation time. If the power generation cannot be met and the feedback power generation time cannot be met, the cross-sectional area of ​​the water conveyance pipeline is controlled at the minimum threshold for power generation until the water storage in the upper reservoir reaches the protection critical value, then power generation is stopped.

[0031] S402. After completing the power generation operation, the mode control center detects the grid load data to determine whether it is during a low-load period. If it is during a low-load period, it controls the pump to perform pumped storage operation; if it is not during a low-load period, it does not perform pumped storage.

[0032] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention, through the combined operation of multiple modules including multi-array data monitoring modules, multi-type storage modules, multi-data analysis modules, and a mode control center, realizes data monitoring, collection, storage, analysis, and control of the entire power generation process of pumped storage power stations. This enables reasonable judgment of grid allocation data, assessment of whether the current water storage capacity of the power station can meet the planned targets, and analysis and control of the degree of contraction in the planned power generation time based on different water storage capacities. This allows for optimal power generation operation control even when the planned allocation tasks cannot be fully completed. Furthermore, by monitoring and analyzing reservoir data and grid load demand, this invention flexibly allocates water pipelines to meet the needs of continuous and stable power supply. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of a pumped storage monitoring data management system based on wireless transmission according to the present invention.

[0035] Figure 2 This is a schematic diagram illustrating the steps of a pumped storage monitoring data management method based on wireless transmission according to the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-2 The present invention provides the following technical solution:

[0038] A pumped storage monitoring and data management system based on wireless transmission, comprising a multi-array data monitoring module, a multi-type data storage module, a multi-data analysis module, and a mode control center;

[0039] The multi-array data monitoring module is used to monitor and collect data on reservoir water levels, water pipelines, and generator sets; the multi-data storage module is used to transmit and receive the collected data via optical fiber and store it in a categorized manner; the multi-data analysis module analyzes the collected water level data, pipeline data, and generator set data; and the mode control center performs corresponding control operations based on the data analysis results.

[0040] The multi-array data monitoring module is connected to the multi-type data storage module; the multi-data analysis module is connected to the multi-type data storage module; the multi-data analysis module is connected to the model control center; and the model control center is connected to the multi-type data storage module.

[0041] The multi-array data monitoring module includes a water level monitoring unit, a pipeline monitoring unit, and a generator set monitoring unit. The water level monitoring unit measures the water level change of the upper reservoir and the cross-sectional area of ​​the bottom of the reservoir using a water level gauge. The pipeline monitoring unit collects the cross-sectional area of ​​the water transmission pipeline. The generator set monitoring unit collects the load power demand data and transmission time of the power grid.

[0042] The multi-type storage module includes an optical transmission unit and a classification storage unit. The optical transmission unit uses a laser as a light source and modulates the light waves output by the laser to transmit data. At the receiving end, the optical signal is received by an optical receiver and converted into an electrical signal. The classification storage unit classifies the received data using a clustering algorithm and stores it separately according to the classification results.

[0043] The multi-data analysis module includes a reservoir water level data analysis unit, a water conveyance pipeline data analysis unit, and a load demand data analysis unit. The reservoir water level data analysis unit analyzes water storage by combining the water level changes during power generation in the upper and lower reservoirs with the bottom cross-sectional area data of the reservoirs. The water conveyance pipeline data analysis unit analyzes the optimal flow cross-sectional area of ​​the pipeline and the flow velocity of the water for different storage quantities and grid load demands. The load demand data analysis unit analyzes the grid load demand and calculates the required power transmission capacity, transmission time, and pumping power demand of the generator sets based on the load demand.

[0044] The mode control center includes a water conveyance pipeline control unit and a power generation and energy storage control unit. The water conveyance pipeline control unit adjusts the cross-sectional area of ​​the pipeline based on the pipeline data analysis results to control the water flow rate through the pipeline. The power generation and energy storage control unit is used to adjust the working mode of the system according to the grid load demand. When the grid load demand is high, the system generates electricity; when the grid load demand is low, the system pumps water for energy storage.

[0045] A method for managing pumped storage monitoring data based on wireless transmission, the method comprising the following steps:

[0046] S100: Equipment data monitoring and collection are carried out by installing equipment in the upper and lower reservoirs, water pipelines and generator sets of pumped storage power stations.

[0047] S200: The collected data is transmitted via light waves, and the received data is classified and stored.

[0048] S300. Analyze the power grid load demand, and combine the power grid load demand and the status data of the power storage station to analyze the reservoir water level, pipeline water flow and velocity, and the power generation and power generation time of the generator set.

[0049] S400 and the mode control center coordinate and control the pumped storage system based on data analysis results.

[0050] The specific steps for monitoring and collecting equipment data in S100 by installing equipment in the upper and lower reservoirs, water pipelines, and generator units of the pumped storage power station are as follows:

[0051] S101. The working status of the pumped storage power station is monitored by installing monitoring equipment in the upper reservoir, lower reservoir, water pipeline and generator set sections.

[0052] S102. Measure the height difference between the upper and lower reservoirs using a GPS measuring instrument; measure the water level data of the upper reservoir using a water level gauge; obtain three-dimensional data of the bottom of the reservoir using a laser scanner, and calculate the bottom cross-sectional area of ​​the reservoir and the cross-sectional area when the pipeline is fully open based on the data; obtain the planned power generation demand of the corresponding pumped storage power station by the power grid load allocation through the connection terminal between the power station and the power grid.

[0053] The specific steps in S200 for transmitting the collected data via light waves, classifying the received data, and storing it are as follows:

[0054] S201. The collected data is converted into light waves and transmitted through a laser source installed on and connected to the monitoring equipment; a receiver is installed at the management terminal at the power plant end to receive the transmitted light waves and convert the data.

[0055] S202. The collected data, analysis data, and control data are finely divided using clustering algorithms, and the data are stored independently in different regions based on the classification results.

[0056] The specific steps in S300 for analyzing grid load demand, and combining grid load demand and the status data of the storage power station to analyze reservoir water level, pipeline water flow and velocity, and generator power generation and generation time are as follows:

[0057] S301. Obtain the current power generation demand plan E of the power plant through the power plant-grid connection terminal. pq and planned transmission time T pq According to the formula Calculate the average flow velocity of water in the pipeline from the upper reservoir; where g is the acceleration due to gravity and H is the height difference between the upper and lower reservoirs; calculate the flow velocity using the conversion formula between potential energy and kinetic energy; and use the formula... Calculate the average flow rate when the water pipeline is fully open; where A is the cross-sectional area of ​​the pipeline when fully open; using the formula... Calculate the required water volume during the planned power generation period when the water pipeline is fully open; using the formula m pq =ρ*V pq Calculate the required water mass for the pipeline to be fully open within the planned time period; where ρ is the density of water in the reservoir; according to the formula E′ pq =m pq gH*ε calculates the actual power generation of the power plant under the condition that the pipeline is fully open during the planned time; where ε is the power generation efficiency of the generator set; E pq With E′ pqThe magnitudes are compared, and a secondary analysis is performed based on the comparison results. First, the planned data allocated by the power grid is calculated based on the current maximum power generation capacity of the power station to determine whether the planned power generation amount can be completed within the planned power generation time.

[0058] S302, if E pq >E′ pq If the power plant cannot meet the power generation requirements at its maximum capacity within the planned time, then the power grid's allocation plan is incorrect; if E pq ≤E′ pq The formula for calculating the current available water volume of the upper reservoir is V. ft = (h2-h0)*A 库 Where h2 is the current upper reservoir water level, h0 is the critical water level for reservoir protection, and A 库 Let m be the cross-sectional area at the bottom of the reservoir; using the formula m ft =ρ*V ft Calculate the current usable water mass in the upper reservoir; according to formula E ft =m ft gH*ε calculates the power generation from the stored water in the upper reservoir; if E ft >E pq If the current water storage in the upper reservoir is sufficient, then power generation will proceed according to the planned power generation volume and time allocated by the power grid; if E ft <E pq If the current water storage capacity of the upper reservoir is insufficient, the feedback power distribution cannot be completed. Therefore, while transferring water, the cross-sectional area of ​​the water transmission pipeline should be reduced; this can be achieved through the formula... Calculate the pipe cross-sectional area A0 to reduce it to meet the power generation time requirement; using the formula The rate of decrease in the pipe's cross-sectional area is calculated. First, if the current power plant's maximum generating capacity can meet the grid's planned output, then the current generating capacity is calculated to ensure it meets the planned output. If the existing water storage is sufficient, power generation continues as normal. If not, the planned output cannot be achieved; then, the control center is first notified that the planned output cannot be fulfilled. Next, the cross-sectional area of ​​the pipe gradually decreases during water transport to determine if it meets the planned power generation time. The final pipe cross-sectional area that meets the plan is calculated, and the pipe contraction rate is determined. This process ensures that the current power plant achieves its maximum generating capacity while simultaneously fulfilling the planned power generation time.

[0059] S303. By retrieving the monitoring data of the generator set, taking the generator set's power W and start-up time t, then according to formula E... 启 =W*t calculates the energy required to start the generator set; using the formula Calculate the mass of water required to start the generator set; the mass calculated here using the potential energy formula is in kilograms, which needs to be converted to tons for subsequent calculations; according to the formula... Calculate the cross-sectional area of ​​the water supply pipeline required for generator set startup, then let A be the cross-sectional area of ​​the pipeline. 启 Let A0 be the threshold value for the minimum cross-sectional area of ​​the water pipeline; then A0∈[A 启 If A0≥A], 启 If the feedback generation time is satisfied, it is recorded as the second feedback result; if there exists A0 < A 启 Then the cross-sectional area of ​​the pipe is reduced to a minimum of A. 启 If the power generation time cannot be met according to the feedback from the mode control center, it is recorded as the third feedback result. The energy required for the generator set to start under the kinetic energy transmitted by the water flow is calculated, and the minimum water conveyance cross-sectional area of ​​the pipeline is calculated in reverse. This value is used as a threshold to compare with the final cross-sectional area calculated above. If the calculated value is greater than the threshold, the planned power generation time can be completed. If the calculated value is less than the threshold, the calculated value is replaced by the threshold, and feedback is given that the planned power generation time cannot be completed. Power generation stops when the water storage in the upper reservoir reaches the critical value.

[0060] The specific steps taken by the S400 model control center to coordinate and control the pumped storage system based on data analysis results are as follows:

[0061] S401. The mode control center determines whether feedback information is received. If no feedback information is received, the power generation process proceeds normally according to the plan. If feedback information is received, the power station is controlled according to the specific feedback content. If the feedback result is an error in the allocation plan, a reallocation request is sent to the grid terminal. If the feedback result is that the planned power generation cannot be met but the power generation time can be met, the cross-sectional area of ​​the water conveyance pipeline is reduced according to the pipeline data analysis results to meet the power generation time. If the power generation cannot be met and the feedback power generation time cannot be met, the cross-sectional area of ​​the water conveyance pipeline is controlled at the minimum threshold for power generation until the water storage in the upper reservoir reaches the protection critical value, then power generation is stopped.

[0062] S402. After completing the power generation operation, the mode control center detects the grid load data to determine whether it is during a low-load period. If it is during a low-load period, it controls the pump to perform pumped storage operation; if it is not during a low-load period, it does not perform pumped storage.

[0063] In the embodiment:

[0064] This project will develop a system for monitoring the temperature of the rotor excitation leads of pumped-storage units, including a dynamic-to-static signal conversion device and a fiber optic wireless transmission device. The main technical and economic indicators are: optical converter, long-term operating speed ≤800 rpm; a rotating platform will be constructed, and the dynamic-to-static signal conversion device will be fixed to a metal frame, with the dynamic part fixed to a rotating tray and the static part on the other side of a rigid support, simulating the operating conditions of the unit during vibration and deviation from the axis. A DC motor will drive the tray to rotate at high speed, controlled at 500 rpm, to monitor the spectral changes of the sensors in real time. After rotation, the dynamic-to-static signal converter will be removed, and professional optical... The equipment and instruments are used to detect wear and light loss of the components. The developed dynamic-static signal conversion device operates at a wavelength of 1550nm, with a maximum insertion loss of less than 1.5dB. It can withstand a maximum speed of 1000rpm, and the effective working distance of the device is 8-10mm. The spot diameter is 0.5-0.8mm, and the insertion loss must be less than 1.5dB to ensure the transmission of temperature signals from the generator stator and rotor. By comparing the spectra, if the spectra of the sensor are basically consistent in static and dynamic states, it is not affected by the rotation speed of the rotating device. The number of peaks represents the number of sensors, and the vertical axis amplitude represents the reflected light intensity of each sensor. After the experiment, the fiber optic signal repeater was removed, and professional optical equipment and instruments were used to test the wear and optical loss of the device end face. If the results showed that the optical loss was within 1.5dB, the test effect was good. At least 16 fiber optic temperature sensors were required. The technical and economic indicators were: ceramic encapsulation, measurement range -20 to +160℃, measurement accuracy ±0.5℃; and fiber optic grating vibration-free temperature sensors. The selection of materials mainly depended on the material's sensitivity to the temperature of the surrounding environment. To achieve double-peak drift and vibration-free sensing, the greater the difference in the center wavelength of the two peaks, the greater the sensitivity. In this project, ceramic encapsulation was selected. The main advantages of ceramic encapsulation are: the overall structure of the sensor is not easily oxidized or corroded, it is resistant to high temperatures, and it does not pollute the environment. One of the major advantages of fiber optic sensors over traditional sensors is their inherent resistance to electromagnetic interference. The introduction of metal-encapsulated sensors may compromise the electrical insulation of existing equipment and potentially create safety hazards, jeopardizing safe operation. The high-speed fiber optic grating temperature demodulator has the following main technical and economic specifications: 8 channels, 10 / 100Base TX (RJ45) interface. The generator rotor fiber optic temperature measurement software has the following main technical and economic specifications: Chinese interface, rotor measurement point diagram, display of real-time temperature, historical maximum temperature, historical minimum temperature, and average temperature at each measurement point, and the ability to set warning and alarm values.

[0065] If a pumped-storage power station employs a wireless transmission-based pumped-storage monitoring data management system and method, the following measures are taken: Monitoring cameras are installed at the reservoir, water conveyance channel, and generator units to monitor the operational status; a GPS measuring instrument measures the height difference between the upper and lower reservoirs to be 300 meters; a water level gauge measures the current water level of the upper reservoir to be 20 meters, and the reservoir's protection water level to be 10 meters; a laser scanner acquires data from the bottom of the reservoir, and the cross-sectional area of ​​the reservoir bottom is calculated to be 10... 6 The area is 10 square meters, and the cross-sectional area of ​​the pipe is 50 square meters; the amount of electricity generated by the power plant and the grid is 3.6 * 10^6 square meters. 10 The power generation time is 3 hours; the monitoring data is converted into light waves by setting up a laser source at the pumping station for transmission, and the light waves are converted into data by setting up a receiver at the power station management terminal; the collected data is classified by clustering algorithm and the classified data is stored independently.

[0066] Calculate the current maximum generating capacity of the power plant based on the grid's planned power generation and generation time; according to the formula... The average flow velocity of the water in the pipeline is calculated to be 76 m / s; using the formula... The average flow velocity when the pipe is fully open is calculated to be 3800 cubic meters per second; using the formula... The calculated water volume required to complete the planned power generation time with the pipeline fully open is 4.1 * 10⁻⁶. 7 cubic meters; according to the formula m pq =ρ*V pq The calculated water requirement is 4.1 * 10⁻⁶. 7 Tons; of which the density of water is 1 ton / cubic meter; according to the formula E′ pq =m pq The calculated maximum actual power generation of the power plant within the planned timeframe is 1.08 * 10^- ... 11 Joules; the generator set's power generation efficiency is 0.9; due to E pq ≤E′ pq Then according to formula V ft = (h2-h0)*A 库 The current available water volume of the upper reservoir is calculated to be 10. 7 tons; according to the formula m ft =ρ*V ft The current available water mass is calculated to be 10. 7 tons; according to formula E ft =m ft The calculated power generation from the currently available water is 0.9 * 10^- ... 10 Joule; due to E ft <E pqIf the current water storage capacity of the upper reservoir is insufficient to complete the planned power generation, then water transfer will be carried out while reducing the cross-sectional area of ​​the water transfer pipeline; according to the formula... The calculated pipe cross-sectional area to meet the power generation time requirement is 49 square meters; according to the formula... The calculated shrinkage rate of the pipeline is 0.33 square meters per hour;

[0067] By retrieving monitoring data from the generator set, and taking the generator set's power as 5*10 7 Watts; startup time is 30 seconds; then according to formula E 启 =W*t The calculated energy required to start the generator set is 1.5*10 9 Joule; according to the formula The calculated water mass required for generator set startup is 500 tons; according to the formula... The calculated starting cross-sectional area of ​​the water supply pipeline required to start the generator set is 0.2 square meters; since A0 ≥ A 启 If the feedback indicates that the power generation time is met, the mode control center receives the feedback information, performs contraction control based on the pipeline data, and reports back to the power grid that the power generation time can be met, but the power generation quantity cannot be met.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pumped storage monitoring and data management system based on wireless transmission, characterized in that: The pumped storage monitoring and data management system based on wireless transmission includes a multi-array data monitoring module, a multi-type data storage module, a multi-data analysis module, and a mode control center. The multi-array data monitoring module is used to monitor and collect data on reservoir water levels, water pipelines, and generator sets; the multi-class data storage module is used to transmit and receive the collected data via optical fiber and store it in a categorized manner. The multi-data analysis module analyzes the collected water level data, pipeline data, and generator set data; the mode control center performs corresponding control operations based on the data analysis results. The multi-array data monitoring module is connected to multiple types of data storage modules; The multi-data analysis module is connected to multiple types of data storage modules; The multi-data analysis module is connected to the model control center; the model control center is connected to the multi-data storage module. The mode control center includes a water pipeline control unit and a power generation and energy storage control unit. The water conveyance pipeline control unit adjusts the cross-sectional area of ​​the pipeline based on the pipeline data analysis results to control the water flow rate through the pipeline; the power generation and energy storage control unit is used to adjust the working mode of the system according to the grid load demand. When the grid load demand is high, the system generates electricity; when the grid load demand is low, the system pumps water for energy storage. The specific steps taken by the model control center to coordinate and control the pumped storage system based on data analysis results are as follows: S401. The mode control center will adjust the power plant according to whether or not feedback information is received. If no feedback information is received, the power generation process will proceed normally according to the plan. If feedback information is received, the power plant will be adjusted according to the specific feedback content. If the feedback result indicates an error in the allocation plan, a reallocation request is sent to the power grid terminal. If the feedback result indicates that the planned power generation cannot be met but the power generation time can be met, then the cross-sectional area of ​​the water conveyance pipeline will be reduced based on the pipeline data analysis results to meet the power generation time; if the power generation cannot be met and the feedback indicates that the power generation time cannot be met, then the cross-sectional area of ​​the water conveyance pipeline will be controlled at the minimum threshold to generate power until the water storage in the upper reservoir reaches the protection critical value, then power generation will be stopped. S402. After completing the power generation operation, the mode control center detects the grid load data to determine whether it is during a low-load period. If it is during a low-load period, it controls the pump to perform pumped storage operation; if it is not during a low-load period, it does not perform pumped storage.

2. The pumped storage monitoring and data management system based on wireless transmission according to claim 1, characterized in that: The multi-array data monitoring module includes a water level monitoring unit, a pipeline monitoring unit, and a generator set monitoring unit. The water level monitoring unit measures the water level change of the upper reservoir and the cross-sectional area of ​​the bottom of the reservoir using a water level gauge. The pipeline monitoring unit collects data on the cross-sectional area of ​​the water transmission pipeline. The generator set monitoring unit collects data on the load power demand and transmission time of the power grid.

3. The pumped storage monitoring and data management system based on wireless transmission according to claim 2, characterized in that: The multi-type data storage module includes an optical transmission unit and a classification storage unit. The optical transmission unit uses a laser as a light source and modulates the light waves output by the laser to transmit data. At the receiving end, the optical signal is received by an optical receiver and converted into an electrical signal. The classification storage unit classifies the received data using a clustering algorithm and stores it separately according to the classification results.

4. The pumped storage monitoring data management system based on wireless transmission according to claim 3, characterized in that: The multi-data analysis module includes a reservoir water level data analysis unit, a water conveyance pipeline data analysis unit, and a load demand data analysis unit. The reservoir water level data analysis unit analyzes water storage by combining the water level changes during the power generation process of the upper reservoir with the bottom cross-sectional area data of the reservoir. The water conveyance pipeline data analysis unit analyzes the optimal flow cross-sectional area of ​​the pipeline and the flow velocity of the water for different storage quantities and grid load demands. The load demand data analysis unit analyzes the grid load demand and calculates the required power transmission capacity, transmission time, and pumping power demand of the generator set based on the load demand.

5. A method for managing pumped storage monitoring data based on wireless transmission, applied to the pumped storage monitoring data management system based on wireless transmission as described in claim 1, characterized in that: The method includes the following steps: S100. Equipment data monitoring and collection are carried out by installing equipment on the upper reservoir, water pipeline and generator set of the pumped storage power station. S200: The collected data is transmitted via light waves, and the received data is classified and stored. S300. Analyze the power grid load demand, and combine the power grid load demand and the status data of the power storage station to analyze the reservoir water level, pipeline water flow and velocity, and the power generation and power generation time of the generator set. S400 and the mode control center coordinate and control the pumped storage system based on data analysis results.

6. The method for managing pumped storage monitoring data based on wireless transmission according to claim 5, characterized in that: The specific steps for monitoring and collecting equipment data in S100 by installing equipment on the upper reservoir, water pipeline, and generator unit of the pumped storage power station are as follows: S101. Monitor the working status of the pumped storage power station by installing monitoring equipment in the upper reservoir, water pipeline and generator set section; S102. Measure the height difference between the upper and lower reservoirs using a GPS measuring instrument; measure the water level data of the upper reservoir using a water level gauge; obtain three-dimensional data of the bottom of the reservoir using a laser scanner, and calculate the bottom cross-sectional area of ​​the reservoir and the cross-sectional area when the pipeline is fully open based on the data; obtain the planned power generation demand of the corresponding pumped storage power station by the power grid load allocation through the connection terminal between the power station and the power grid.

7. The method for managing pumped storage monitoring data based on wireless transmission according to claim 6, characterized in that: The specific steps in S200 for transmitting the collected data via light waves, classifying the received data, and storing it are as follows: S201. The collected data is converted into light waves and transmitted through a laser source installed on and connected to the monitoring equipment; a receiver is installed at the management terminal at the power plant end to receive the transmitted light waves and convert the data. S202. The collected data, analysis data, and control data are finely divided using clustering algorithms, and the data are stored independently in different regions based on the classification results.

8. The method for managing pumped storage monitoring data based on wireless transmission according to claim 7, characterized in that: The specific steps in S300 for analyzing grid load demand, and combining grid load demand and the status data of the storage power station to analyze reservoir water level, pipeline water flow and velocity, and generator power generation and generation time are as follows: S301. Obtain the current power generation demand plan E of the power plant through the power plant-grid connection terminal. pq and planned transmission time T pq According to the formula Calculate the average flow velocity of water in the pipeline from the upper reservoir; where g is the acceleration due to gravity and H is the height difference between the upper and lower reservoirs; using the formula... Calculate the average flow rate when the water pipeline is fully open; where A is the cross-sectional area of ​​the pipeline when fully open; using the formula... Calculate the required water volume during the planned power generation period when the water pipeline is fully open; using the formula Calculate the required water mass for when all pipes are fully open during the planned time period; among which, The density of water in the reservoir; according to the formula Calculate the actual power generation of the power plant under the condition that all pipelines are open during the planned time; among which, The power generation efficiency of the generator set; E pq With E pq ’ The sizes are compared, and a secondary analysis is performed based on the comparison results; S302, if E pq >E pq ’ If E is incorrect, the grid allocation plan is reported to the mode control center, and this is recorded as the first feedback result; pq ≤E pq ’ The formula for calculating the current available water volume of the upper reservoir is V. ft =(h2-h0)*A 库 ;in, This is the current water level of the upper reservoir. For the critical water level height for reservoir protection, A 库 The cross-sectional area of ​​the reservoir bottom; using the formula Calculate the current mass of usable water in the upper reservoir; according to the formula Calculate the power generation of the reservoir's current water storage capacity; if E ft >E pq If the current water storage in the upper reservoir is sufficient, then power generation will proceed according to the planned power generation volume and time allocated by the power grid; if E ft <E pq If the current water storage capacity of the upper reservoir is insufficient, the feedback power distribution cannot be completed. Therefore, while transferring water, the cross-sectional area of ​​the water transmission pipeline should be reduced. This can be achieved through the formula: ； Calculate the pipe cross-sectional area to reduce the time required for power generation. ; through formula Calculate the rate of decrease of the pipe's cross-sectional area; S303. By retrieving the monitoring data of the generator set, taking the generator set's power W and start-up time t, then according to formula E... 启 =w*t calculates the energy required to start the generator set; using the formula m 启 =(E 启 / gH)*10 -3 Calculate the mass of water required to start the generator set; according to the formula ； Calculate the cross-sectional area of ​​the water supply pipeline required for generator set startup, then let A be the cross-sectional area of ​​the pipeline. 启 Let A0 be the threshold value for the minimum cross-sectional area of ​​the water pipeline; then A0∈[A 启 If A0≥A], 启 If the feedback generation time is satisfied, it is recorded as the second feedback result; if there exists A0 < A 启 Then the cross-sectional area of ​​the pipe is reduced to a minimum of A. 启 Furthermore, if the power generation time cannot be satisfied with the feedback from the mode control center, it is recorded as the third feedback result.

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