407 results about "Pumped-storage hydroelectricity" patented technology

The invention provides a blast suppression method and system for an underground cavity of a pumped storage power station. The method comprises the following steps: configuring and deploying a multispectral gas sensor array; carrying out gas explosion limit calculation and risk assessment; calculating the risk level of explosion by using the prediction model; performing graded explosion suppression operation by using a graded explosion suppression execution module; combustible gas is guided to enter an inerting area by utilizing a space flow guide optimization module; and the ignition source blocking module is used for cooperative control to block an ignition source. The technical problems of low mixed gas explosion risk prediction and monitoring precision, low explosion suppression efficiency, slow response speed and relatively high operation and maintenance cost are solved.

A rock mass mechanical parameter prediction method based on an underground powerhouse of a pumped storage power station relates to the technical field of mechanical parameter prediction, and comprises the following steps: identifying an embedding position and distribution characteristics of a sulfur-containing shale interlayer by constructing a three-dimensional geologic structure model and lithologic information of a construction area, and establishing a structural domain partition parameter prediction area system; constructing a nonlinear regression function model taking infrared spectrum characteristic factors and environment control parameters as input and taking elasticity modulus and the like as output by combining infrared spectrum characteristic data and a historical evolution track; the model is embedded into a regional system for dynamic assignment, and a parameter space-time change atlas is constructed; the laser point cloud data and the micro-seismic monitoring data are fused to invert the actual response of the surrounding rock; when the monitoring value deviates from the prediction map, triggering parameter degradation function re-calibration to complete parameter dynamic updating and prediction closed loop; according to the method, the accuracy of rock mass mechanical parameter prediction of the pumped storage power station underground powerhouse can be improved.

The invention discloses a pumped storage power station trans-provincial capacity configuration method, device and equipment and a medium. The method comprises the following steps: collecting and arranging a grid structure, system total adjustable capacity, load and new energy prediction data of a regional power grid in a research level year; the regional power grid pumped storage capacity trans-provincial mutual aid research is carried out by taking reduction of the overall system operation cost and the new energy power abandoning rate of the regional power grid as the target, and a pumped storage power station trans-provincial capacity configuration model is established. Optimal configuration analysis is carried out by combining the newly-added total capacity of the pumped storage power station in regional power grid planning in a research level year, and an optimal configuration scheme of the newly-added pumped storage capacity among provinces is obtained. The regional power grid trans-provincial power transmission channel and the unified scheduling mechanism are utilized, optimal allocation of resources on the regional level is achieved through pumped storage trans-provincial mutual aid, the operation economical efficiency of the whole regional power grid can be improved, and the problem that pumped storage resources of all provinces are distributed unevenly is effectively solved.

The invention relates to a constant-pressure heat compensation compressed air energy storage system relying on a pumped storage power station and an operation method of the constant-pressure heat compensation compressed air energy storage system. The invention discloses a constant-pressure heat compensation compressed air energy storage system relying on a pumped storage power station. The constant-pressure heat compensation compressed air energy storage system comprises a constant-pressure compressed air energy storage subsystem and a water source heat pump subsystem. The constant-pressure compressed air energy storage subsystem comprises a constant-pressure compressor, a first heat exchanger, a constant-pressure air storage chamber, a second heat exchanger and a constant-pressure expansion machine which are sequentially connected through pipelines; the constant-pressure gas storage chamber is connected with an upper reservoir of the pumped storage power station through a pressure balance pipeline; the water source heat pump subsystem comprises a heat storage tank, a second heat exchanger, a heat pump expansion machine, a cold storage tank and a heat pump compressor which are sequentially connected through pipelines; the cold storage tank is connected with a lower reservoir of the pumped storage power station through a heat exchange pipeline; the constant-pressure compressed air energy storage subsystem and the water source heat pump subsystem are connected through a second heat exchanger and achieve energy interaction.

The invention provides a multi-task comprehensive utilization system and method for a low-water-head high-variable-amplitude pumped storage power station. The multi-task comprehensive utilization system comprises an upper reservoir, a lower reservoir, a diversion tunnel, a pumped storage unit, a communicating pipeline and a peripheral water distribution main line. The upper reservoir and the lower reservoir simultaneously have a water supply function and a function of guaranteeing operation and power generation of the pumped storage unit; monitoring water level changes of the upper reservoir and the lower reservoir in real time through an intelligent monitoring system to obtain a water head difference; the water quantity of the upper reservoir and the lower reservoir is dynamically dispatched according to the water head difference, the water supply requirements of areas around a project are met preferentially, and meanwhile safe and stable operation of a power grid is guaranteed as much as possible. According to the invention, a multi-objective genetic algorithm is used to optimize power generation, water supply and ecological benefit objectives; meanwhile, excavated earthwork is processed and treated to serve as building aggregate, the ecology is improved through the water surface of the power station, and local economy is promoted. According to the method, multi-task cooperation of water supply, power generation, aggregate supply, ecological improvement and economic development is achieved, the comprehensive benefits of engineering are improved, and sustainable development is promoted.

The invention discloses a space safety risk identification method and system in a pumped storage power station disaster scene, and the method comprises the steps: collecting the pre-disaster and post-disaster unmanned plane oblique photography data of a pumped storage power station, and constructing a three-dimensional point cloud model; key connection nodes are positioned in the three-dimensional point cloud model, and the space coordinate offset of each node is calculated; calling a historical claim settlement database, and constructing a three-dimensional deformation-economic cost mapping model; comparing the space coordinate offset with a three-dimensional damage deformation mode label in the three-dimensional deformation-economic cost mapping model by adopting a point cloud feature pyramid network, and outputting a hidden damage similarity index A; and activating the MEMS vibration sensor at the key node, calculating a loosening danger index B in combination with the similarity index A, and when the similarity index A and the loosening danger index B both exceed a preset threshold value, identifying the equipment node as an equipment node with a high chain collapse risk, and triggering a pre-compensation mechanism. According to the method, the recognition accuracy of the implicit structure damage can be remarkably improved.

The invention discloses a pumped storage power station water turbine top cover bolt fault alarm system and an alarm method, relates to the technical field of fault monitoring, and is used for monitoring stress and temperature data of top cover bolts through grating stress sensors in the top cover bolts. The method comprises the following steps: performing feature extraction on stress and temperature data to obtain the feature quantity of each bolt, and storing the feature quantity of each bolt to a current cache region Ai of a feature quantity cache region; the working condition of each top cover bolt and the working condition of the unit in the cache region A (i-1) are judged according to the bolt characteristic quantity data of the current cache region Ai and the adjacent cache region A (i-1) and cache region A (i-2), the working state of each unit is judged according to the bolt characteristic quantity data and the working condition data in the cache region A (i-1), and an alarm signal is sent out. And meanwhile, a threshold prediction model is established according to the convolutional neural network to output the optimized latest alarm threshold and send the optimized latest alarm threshold to an early warning rule base.

The invention discloses a method for planning a road between an upper reservoir and a lower reservoir of a pumped storage power station based on an improved A * algorithm, and the method comprises the steps: S1, carrying out the rasterization of three-dimensional terrain point cloud data of a target region of the pumped storage power station, and generating a digital elevation model (DEM); s2, identifying a natural obstacle area in the target area, and generating an impassable area matrix map; s3, constructing a heuristic function comprehensively considering distance and gradient, an enhanced cost function and a multilayer neighborhood search strategy, performing path search based on an improved A * algorithm, and constructing an initial path; s4, performing optimization processing on the initial path to obtain a final path; and S5, superposing the optimized final path to an original terrain grid map for visualization, calculating and displaying key design indexes of the path, and assisting a designer to perform scheme comparison and selection and engineering decision. The method is high in intelligent degree, high in engineering adaptability and suitable for rapid line selection and optimization design of the upper and lower reservoir roads of the pumped storage power station in the complex mountainous area.

The invention provides an anti-seepage structure, a pumped storage power station anti-seepage bottom plate and a construction method, and relates to the technical field of anti-seepage engineering.The structure comprises a joint core bottom plate, an auxiliary bottom plate and a connecting piece, and the periphery of the bottom of the joint core bottom plate extends in the horizontal direction to form protrusions; concave parts matched with the protrusions are arranged on the periphery of the bottom of the auxiliary bottom plate, the joint core bottom plate and the auxiliary bottom plate are connected through connecting pieces, and the protrusions are arranged in the concave parts. The construction efficiency can be effectively improved.

The invention discloses a new energy and pumped storage combined power generation system full life cycle carbon emission evaluation method, and relates to the technical field of power system carbon footprints. Comprising the following steps: firstly, obtaining and preprocessing carbon emission data of a new energy power station including a wind power station, a photovoltaic station and a pumped storage power station, and generating a training sample data set; then, a neural network model is established based on the data set, and training is carried out by taking power station construction feature data including the material consumption, the transportation distance and the equipment number as input and taking the carbon emission as a label; and then, inputting construction characteristic data and environmental parameters of the power station to be evaluated, and correcting a carbon emission predicted value. And finally, in combination with the dynamic growth index of the load demand of the power grid, calculating the full-life-cycle carbon emission, and realizing accurate evaluation. The method has the characteristics of systematicness, intellectualization and data driving, and is suitable for carbon emission management and optimization of a new energy and pumped storage combined power generation system.

The invention relates to the technical field of terrain information processing, in particular to an intelligent decision-making system and method for excavation and filling parameters of a reservoir area of a pumped storage power station. The method comprises the following steps: acquiring topographic data of a reservoir area; determining elevation distribution characteristics according to the topographic data of the reservoir area; performing excavation and filling boundary analysis based on the elevation distribution characteristics to obtain excavation and filling boundary data; performing earth-rock volume calculation according to the excavation and filling boundary data to obtain earth-rock balance data; identifying the section excavation and filling unbalance degree based on the earth-rock balance data to obtain excavation and filling deviation data; performing slope stability analysis according to the excavation and filling deviation data to obtain slope stability data; performing leakage risk prediction according to the slope stability data to obtain leakage risk data; and identifying a seepage path according to the seepage risk data. According to the method, excavation and filling parameter optimization is realized based on a topographic information processing technology, and the reservoir area construction decision efficiency is improved.

The invention discloses a pumped storage power station electric power carbon footprint accounting method and system, and relates to the technical field of carbon footprint accounting, and the method comprises the steps: obtaining a carbon footprint model of each stage of pumped storage power station carbon emission; according to the first carbon footprint model, determining carbon emission in an early preparation stage; according to the second carbon footprint model, carbon emission in the construction stage is determined; according to the third carbon footprint model, carbon emission in the operation and maintenance stage is determined; according to the fourth carbon footprint model, carbon emission in the decommissioning and demolition stage is determined; according to the carbon emission of the early-stage preparation stage, the carbon emission of the construction stage, the carbon emission of the operation and maintenance stage and the carbon emission of the decommissioning and dismantling stage, the full-life-cycle carbon emission of the pumped storage power station is determined. The electric power carbon footprint accounting method provided by the invention is relatively accurate and suitable for the pumped storage power station.

The embodiment of the invention provides a site selection method of a pumped storage power station and related equipment, and belongs to the technical field of information processing. The method comprises the following steps: acquiring and identifying a river system and a contour line through topographic data; traversing all river systems, identifying a source node, a confluence node and an outflow node according to the beginning and end of the water system and the intersection condition of the water system, and generating discrete nodes according to a communication path so as to mark each water system node in the river system; calculating a reservoir area range and an optimal dam line of a reservoir at each water system node according to the water system nodes and the contour lines; generating a closed image according to the optimal dam line and the contour line, and calculating the limit storage capacity, the water level area curve and the water level storage capacity curve of the reservoir at the water system node; and screening to obtain a target reservoir through preset dam characteristic parameters according to the limit reservoir capacity, the water level area curve and the water level reservoir capacity curve of the reservoir at each water system node. According to the embodiment of the invention, omission of a high-quality dam site can be effectively avoided.

The invention provides a pumped storage power station carbon optimization method based on deep reinforcement learning, and relates to the technical field of energy equipment management and optimization. Calling a multi-agent system; designing a dynamic reward function; training the strategy prediction model of each agent in the multi-agent system by adopting a deep reinforcement learning algorithm and taking the optimal carbon emission effect based on the recent period T as an optimization target; and applying an optimization strategy and performing real-time adjustment to ensure stable operation of the system. Through the synergistic effect of all the steps, low-carbon and efficient operation of the pumped storage power station is achieved, and remarkable economic and environmental benefits are achieved.

The invention provides a pumped storage power station differential grounding platform setting method and system and electronic equipment, and the system comprises a space-time multi-physics field feature description module which is used for collecting multi-source heterogeneous data of the whole field domain of a pumped storage power station, and a four-dimensional geoelectric structure model capable of reflecting soil resistivity space distribution and time dynamic change is constructed through the data, and a grounding short circuit fault risk distribution diagram of the whole field domain is generated according to the model and a preset short circuit current level. According to the method, the four-dimensional geoelectric structure model is constructed, so that too simplified homogenization and static assumptions in traditional design are abandoned fundamentally, the real physical environment of the complex site of the pumped storage power station can be scientifically represented with unprecedented precision and dimensionality, and a solid data and physical model foundation is laid for subsequent precise design.

The invention provides a vertical shaft type water inlet and outlet gate system of a pumped storage power station, and belongs to the technical field of water conservancy safety control. Comprising a cylindrical gate, a closed shaft, a trash rack section, a diffusion section, a straight pipe section, a bent pipe section and a tunnel section which are sequentially arranged on the cylindrical gate vertical shaft type water inlet and outlet in the power generation water flow direction. One end of the trash rack section is a horn mouth section, the trash rack section is provided with a cover plate, a diversion pier and a trash rack, and the lower portion of the cover plate of the trash rack section is connected with the diversion pier; digging a hole in the center of the cover plate; the trash rack is provided with an orifice serving as a water inlet / outlet orifice; a diversion tunnel is connected behind the bent pipe section; the gate is a cylindrical gate and arranged above the water inlet and outlet, the gate is vertically communicated, the bottom of the gate is fixed to the inner surface of the horn mouth section concrete, the top of the gate is fixed to a cover plate of the trash rack section, and the periphery of the gate is fixedly connected with a closed shaft through a diversion pier wall. The construction difficulty can be reduced, and the maintenance convenience degree can be improved.

The invention discloses a power grid dispatching method, device and equipment based on water and electricity flexibility and a medium. The method comprises the steps that the water and electricity flexibility supply capacity is quantified according to historical output data of a pumped storage power station; the hydroelectric flexibility demand is quantified according to the prediction error of the new energy output; determining a flexible supply-demand relationship according to the hydroelectric flexible supply capability and the hydroelectric flexible demand; constructing a power grid dispatching model based on the flexible supply-demand relationship, and generating an initial dispatching strategy by taking the minimum residual load variance as a target; based on a power grid dispatching model, a pumped storage power station is regarded as an intelligent agent, a multi-dimensional state space with peak regulation, frequency modulation, phase modulation and flexibility margin as cores is constructed, a near-end strategy optimization algorithm is adopted for iterative optimization of a dispatching strategy, a multi-scene dispatching strategy is obtained, and power grid dispatching is carried out. According to the method, high-precision quantification of flexibility can be realized, the requirement of multi-scene cooperative operation is met, and the scheduling effect of a power grid in flexibility and potential toughness dimensions is effectively improved.

The invention discloses a source network storage coordinated planning method and system considering pumped storage flexibility and power flow safety, and the method comprises the steps: building an action mechanism model of pumped storage on power grid power flow distribution and system safety based on the flexible adjustment capability analysis of a pumped storage power station, and obtaining a first constraint; jointly considering the site selection and sizing decision of a generator set, a power transmission line and a pumped storage power station, and modeling the investment cost and operation constraint of each device to obtain a second constraint; based on an alternating current power flow model linearization method, carrying out modeling on the operation constraint of the power transmission network to obtain a linear alternating current power flow model as a third constraint, and carrying out modeling on various investment, construction and backup costs; constructing a source network storage coordinated planning model according to the action mechanism model and the linear alternating current power flow model; and taking minimization of the sum of system investment cost and operation cost as an objective function, and solving to obtain a source network storage coordinated planning decision scheme. The method can improve the expansion planning economy and operation flexibility of the power transmission network, and guarantees the power flow safety.

The invention provides a special geomembrane for a pumped storage power station and a preparation method of the special geomembrane, and relates to the technical field of geomembrane materials. The special geomembrane for the pumped storage power station comprises an outer layer, a middle layer and an inner layer which are sequentially connected, the outer layer is prepared from the following raw materials: 55 to 65 percent of MDPE, 33 to 40 percent of HDPE, 1 to 5 percent of antioxidant master batch and 1 to 7 percent of double-resistant color master batch; the middle layer is prepared from the following raw materials: 15 to 25 percent of HDPE (High-Density Polyethylene), 35 to 45 percent of LLDPE (Linear Low Density Polyethylene), 25 to 35 percent of POE (Polyolefin Elastomer), 1 to 5 percent of antioxidant master batch and 3 to 7 percent of double-resistant color master batch; the inner layer is prepared from the following raw materials: 35 to 45 percent of MDPE, 40 to 50 percent of LLDPE, 8 to 12 percent of POE, 1 to 5 percent of antioxidant master batch and 3 to 7 percent of double-resistant color master batch. The strength, the fatigue resistance and the aging resistance are balanced on the whole, so that the long-term operation requirement of the pumped storage power station is met.

This invention belongs to the technical field of pumped storage power station benefit analysis. It discloses a method for analyzing the economic benefits of pumped storage power stations based on diversified market transactions. The method includes: obtaining a structured market time series table, obtaining a detailed report on electricity revenue, obtaining an ancillary service revenue assessment report, obtaining a carbon market revenue report, obtaining a green value revenue analysis report, integrating the detailed report on electricity revenue, the ancillary service revenue assessment report, the carbon market revenue report, and the green value revenue analysis report, allocating the power station's public costs, obtaining a multi-market revenue and cost summary report, obtaining a net benefit sensitivity analysis report, and obtaining a comprehensive power station assessment and decision report, which are then output. Overall, this invention has significant advantages such as comprehensive benefit assessment, high accuracy in calculating net benefits from various markets, and reliable role in power station economic benefit analysis.

This application relates to a combined mechanical gravity energy storage system and design method for a hydropower station. The combined mechanical gravity energy storage system includes a pumped storage power station and a mechanical gravity energy storage system. The pumped storage power station includes an upper reservoir, a lower reservoir, and an underground powerhouse. The upper and lower reservoirs are located upstream and downstream of the dam body, respectively, and there is a predetermined height difference between them. The upper and lower reservoirs are connected to the underground powerhouse through water diversion tunnels, and the underground powerhouse is located inside the dam body. The mechanical gravity energy storage system includes a rotary hoist, a loading bin, a unloading bin, and gravity blocks. The rotary hoist is located on the top of the dam body, and the loading and unloading bins are located on the dam body, with a predetermined height difference between them. The rotary hoist can transport the gravity blocks back and forth between the loading and unloading bins.

The application discloses a kind of purifying ventilators for pumped storage power station, belong to purifying ventilator technical field, including intake pipe, the intake pipe is communicated with purification pipe, the purification pipe is located intake pipe both sides and is equipped with filter plate, the both ends of purification pipe are communicated with gas outlet pipe, the gas outlet pipe is equipped with suction fan, the purification pipe is located above two filter plates and is equipped with support seat, the support seat is fixedly connected with rotating shaft above, the rotating shaft passes through purification pipe and is rotatably connected with purification pipe, the end of rotating shaft away from support seat is fixedly connected with sprocket, and chain is equipped between two sprockets.The purifying ventilator for pumped storage power station is changed by chain and sprocket, so that two filter plates can rotate synchronously, so that the air inlet surface and air outlet surface of filter plate are reversed, so that both sides of filter plate can be fully utilized, and the situation that only one side of filter plate is fully utilized in prior art is improved.

This invention provides a multi-point decentralized underground engineering structure and design method for pumped storage power stations in karst areas, relating to the field of water conservancy and hydropower engineering technology. It includes upper and lower reservoirs arranged at varying elevations on a mountainside, connected by a water conveyance tunnel. The power plant of the pumped storage power station is functionally zoned and dispersed within the mountainside between the upper and lower reservoirs. The power plant includes several generator sets located on the water conveyance tunnel. The generator sets are connected to a access tunnel via shafts, which connects to the control center and serves as the entrance and exit for the power plant. This invention employs a multi-point decentralized layout strategy, subdividing the power plant into several smaller spaces, thus achieving flexibility in layout. This design helps avoid adverse geological conditions such as karst and caves; it not only reduces the difficulty and workload of seepage prevention treatment but also saves on project investment.

The invention discloses a method, equipment and medium for calculating dynamic power generation carbon emission intensity of a pumped storage power station, belongs to the technical field of carbon emission accounting, and solves the problem of how to improve the real-time performance and accuracy of carbon emission intensity calculation of a power generation link of the pumped storage power station. According to the method, the system electricity utilization carbon emission intensity in the power grid associated area related to the operation of the pumped storage power station in real time is introduced, so that the corresponding carbon emission intensity can be dynamically captured and evaluated in real time when the pumped storage power station absorbs electric energy formed by different power supplies at different operation moments; the influence of natural inflow such as rainfall on the operation efficiency and the generating capacity of the pumped storage power station is further considered, so that the calculation result of the carbon emission intensity of the final power generation link better fits the actual operation condition of the power system.

This application discloses an operation control method, apparatus, medium, and equipment for pumped storage power stations. The method includes: obtaining the usage willingness of each bidding entity for each pumped storage power station, the usage willingness being determined based on the load information and renewable energy output information of each bidding entity; determining the equity parameters of each bidding entity using each pumped storage power station based on the power allocation ratio of each bidding entity to each pumped storage power station and the usage willingness of each bidding entity; determining the target bidding entities to which each pumped storage power station is allocated based on the equity parameters of each bidding entity; determining the pumping plan of each pumped storage power station based on the load information of the target bidding entities to which each pumped storage power station is allocated; and controlling each pumped storage power station to operate according to the corresponding pumping plan. This application can reasonably and accurately control pumped storage power stations.

This disclosure provides a method and system for selecting the site of pumped storage power stations based on spatial constraints and elastic buffers, relating to the field of data processing technology. The method includes: acquiring a set of spatial constraint elements corresponding to the pumped storage power station; determining the constraint control rules corresponding to each spatial constraint element in the set; applying range constraints to each associated spatial constraint element based on the constraint control rules; generating at least one elastic buffer corresponding to each spatial constraint element; determining engineering requirement indicators and geological assessment indicators; and filtering the elastic buffer based on the engineering requirement indicators and geological assessment indicators to obtain the target effective construction area. This solution enables differentiated management of different types of spatial constraint elements, thereby ensuring the safety of pumped storage power station construction, and allows for multi-dimensional filtering of elastic buffers to determine the target effective construction area, ensuring the accuracy and practicality of the target effective construction area.

The present disclosure provides a method and system for simulating pumped storage power station dam engineering considering terrain, comprising: obtaining DEM data of a reservoir area where a pumped storage power station dam is located; based on the DEM data, generating a reservoir surface and a horizontal transverse center line of a dam top plane by using a spatial data analysis method; based on the obtained horizontal transverse center line of the dam top plane and a preset width of the dam top plane, generating a dam top plane; and based on the constructed slope equations of both sides of the dam and the obtained boundary of the slope of both sides of the dam, constructing a dam body geometric shape and obtaining the volume of the dam body; according to the obtained DEM data, generating a thickness planing surface boundary of the mountain bodies on both ends of the dam; based on the obtained reservoir surface, dam body geometric shape, dam body volume and thickness planing surface boundary of the mountain bodies on both ends of the dam, constructing a dam body model, and based on the constructed dam body model, simulating pumped storage power station dam engineering.

The invention provides a pumped storage power station underground powerhouse construction parameter prediction method and device based on a knowledge graph, and belongs to the technical field of knowledge graphs, and the method comprises the steps: obtaining the construction data of a pumped storage power station underground powerhouse, and constructing a construction knowledge graph; performing graph embedding modeling on each entity node, embedding entities and topological structures thereof into semantic vectors, and enabling semantic paths and entity attributes in the knowledge graph to jointly form a feature space for construction parameter prediction; on the basis of construction related data obtained in real time, entity attributes are updated, and entity insertion and entity relation edge updating operation is executed on the newly added event nodes so as to construct a dynamic knowledge graph evolution sub-graph; and on the basis of the evolution sub-graph, aggregating the adjacent entity embedded representation of the entity node under the multi-hop semantic path, and predicting the predicted values of the construction parameters of the current geological unit and the current disturbance response condition through a node aggregation function and a path attention mechanism. According to the method, the construction parameters can be predicted according to the existing construction data.

The application discloses a kind of double-fed variable-speed pumped storage power station regulating system stable domain quantitative analysis method, this method is by establishing the fine model of double-fed variable-speed pumped storage power station regulating system, and the stable domain of fine model is simulated and calculated in time domain;By reducing the order to the fine model, the stable domain and the margin domain of the reduced-order model are derived and calculated;The stable margin of reduced-order model is used to quantify the stability domain of fine model.The method disclosed in the application points out the stability difference of the fine model and the reduced-order model of the control system of variable-speed pumped storage power station, which can guide the personnel of variable-speed pumped storage power station to use the reduced-order model to optimize the design of complex system parameter setting and hydraulic and electrical parameters, and improve the accuracy of the results.

The invention relates to a construction method for a long inclined shaft of a pumped storage power station. The method is suitable for the technical field of pumped storage power station construction. According to the technical scheme, the construction method for the long inclined shaft of the pumped storage power station comprises the steps that a small-diameter TBM is adopted to conduct excavation from bottom to top along the axis of the long inclined shaft to be excavated, and a pilot tunnel arranged along the axis of the long inclined shaft is formed; and after excavation of the pilot tunnel is completed, the inclined shaft reaming TBM is adopted for excavation from top to bottom along the axis of the long inclined shaft to be excavated, and the long inclined shaft is formed. In order to solve the problems that the water diversion inclined shaft of the pumped storage power station is long in construction length, large in gradient, small in construction working face, long in construction period, various in working procedure, changeable and complex in geological condition and the like, the method that a pilot tunnel is excavated through a small-diameter TBM firstly, and then one-time forming is achieved through inclined shaft reaming TBM expanding excavation is adopted; the method solves the potential safety hazard that the geological condition in front cannot be detected in manual drilling and blasting in the inclined shaft construction process and in the inclined shaft TBM construction process, the hole forming quality is improved, disturbance to surrounding rock is reduced, and the construction safety of personnel is guaranteed.