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CN-122014480-A - Series-type hydroelectric power generation system, method, terminal and medium

CN122014480ACN 122014480 ACN122014480 ACN 122014480ACN-122014480-A

Abstract

The invention belongs to the technical field of hydroelectric generation, and particularly discloses a serial hydroelectric generation system, a serial hydroelectric generation method, a serial hydroelectric generation terminal and a serial hydroelectric generation medium. The system comprises a semi-open hydraulic channel and a plurality of hydroelectric generation units which are sequentially arranged in series along the water flow direction, wherein each hydroelectric generation unit is provided with a height adjusting mechanism and a multisource state sensing unit. The control unit analyzes the overall operation state of the serial water-turbine power generation system based on the obtained operation state information of all the water-turbine power generation units, generates a height adjustment control instruction corresponding to at least one water-turbine power generation unit, and realizes coordination control of the operation state of the serial system by adjusting the submergence depth of the water wheel relative to the water flow. The invention can improve the overall power generation efficiency and the operation stability of the serial hydroelectric power generation system, and is suitable for application scenes such as multi-stage water energy utilization and the like.

Inventors

  • GAO JISHU
  • GAO HONGSEN

Assignees

  • 中科电能科技(山东)有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. A tandem hydro-power generation system, comprising: A semi-open hydraulic channel for forming a water flow flowing in a predetermined direction; the water turbine power generation units are at least provided with two water turbine power generation units and are sequentially arranged in series along the water flow direction, and each water turbine power generation unit comprises a water turbine arranged vertically, a generator connected with the water turbine and a mounting structure for supporting the water turbine and the generator; the height adjusting mechanism is connected with the mounting structure and is configured to drive the corresponding water turbine generating units to move along the height direction so as to change the submergence depth of the water turbine relative to the water flow; the multisource state sensing unit is arranged on the hydro-power generation unit and is configured to acquire the running state information of the corresponding hydro-power generation unit; The control unit is electrically connected with each height adjusting mechanism and each multi-source state sensing unit and is configured to: Generating a height adjustment control command corresponding to at least one hydro-power generation unit based on the operational status information from all hydro-power generation units; and controlling the corresponding height adjusting mechanism to execute the height adjusting control instruction, and executing height adjustment on at least one of the plurality of hydro-power generating units.
  2. 2. A method of tandem hydroelectric power generation using the tandem hydroelectric power generation system of claim 1, comprising the steps of: S1, forming water flow flowing along a preset direction in a semi-open hydraulic channel, so that a plurality of hydroelectric generating units operate under the action of the water flow; s2, acquiring operation state information of all the hydro-power generation units through multi-source state sensing units respectively arranged on the hydro-power generation units, wherein the operation state information comprises rotation speed parameters and power generation power parameters of the hydro-power generation units, and transmitting the operation state information to a control unit; S3, the control unit analyzes the operation state information of all the hydro-power generation units and generates a height adjustment control instruction corresponding to at least one hydro-power generation unit; S4, the control unit controls the corresponding height adjusting mechanism to execute a height adjusting control instruction, drives the corresponding water wheel power generation unit to move along the height direction, and changes the submergence depth of the water wheel relative to the water flow; and S5, continuously acquiring the running state information of all the hydro-power generation units in the height adjustment process or after the height adjustment is completed.
  3. 3. The tandem hydroelectric power generation method according to claim 2, wherein step S3 comprises the steps of: S3-1, a control unit constructs a combined state data set for representing the running state of each hydroelectric generating unit based on the acquired rotating speed parameters and generating power parameters of all the hydroelectric generating units; S3-2, the control unit combines the combined state data set to establish an efficiency evaluation model for evaluating the overall power generation efficiency of the serial hydroelectric power generation system, wherein the efficiency evaluation model is used for reflecting the influence relationship of different hydroelectric power generation units on the overall power generation efficiency under different immersion depth conditions; S3-3, introducing a preset operation constraint condition into the efficiency evaluation model, wherein the operation constraint condition comprises an allowable height adjustment range of the hydroelectric generating units, the maximum rotation speed of the water wheels and relative operation coordination constraint among the hydroelectric generating units; S3-4, the control unit performs joint analysis on the operation states of the water-turbine power generation units based on the efficiency evaluation model and the operation constraint conditions, and determines a target adjustment scheme for enabling the overall power generation efficiency of the serial water-turbine power generation system to be optimal under the condition that the operation constraint conditions are met; And S3-5, the control unit generates a height adjustment control instruction corresponding to at least one hydroelectric generating unit according to the target adjustment scheme.
  4. 4. A method of tandem hydroelectric power generation according to claim 3, wherein in step S3-3, the coordination constraints comprise at least one of: the submergence depth difference of the adjacent water-turbine generating units does not exceed a threshold value; The rotation speed difference of the adjacent water-wheel generating units does not exceed a threshold value; The relative deviation of the output power of each hydroelectric generating unit does not exceed a threshold value; the submerging depth of each hydroelectric generating unit meets the monotonous sequence relation along the water flow direction; the immersion depth change rate of each hydroelectric generating unit does not exceed a threshold value.
  5. 5. The tandem hydroelectric power generation process of claim 3 or 4, wherein the operating constraints comprise: The submergence depth of the ith hydro-power generation unit meets the allowable height adjustment range constraint: Wherein, the Indicating the current depth of submersion of the ith hydro-power generation unit, And Respectively representing the minimum immersion depth and the maximum immersion depth allowed by the hydroelectric generating unit; The rotation speed of the ith hydroelectric generating unit meets the maximum rotation speed constraint: Wherein, the Represents the rotation speed parameter of the ith hydro-power generation unit, Representing the maximum allowable rotation speed of the corresponding hydroelectric generating unit; the relative operational coordination constraints include: The immersion depth difference of adjacent hydroelectric generating units does not exceed a threshold value: Wherein, the Representing a maximum allowable immersion depth difference between adjacent hydro-power generation units; the rotational speed difference of adjacent hydroelectric generating units does not exceed a threshold value: Wherein, the Representing a maximum allowable rotational speed difference between adjacent hydro-power generation units; the efficiency evaluation model is constructed according to the following objective function, and the objective function is optimized to determine an objective adjustment scheme: the method comprises the following steps of (1) setting a water turbine generating system, wherein J represents an overall generating efficiency evaluation target value of the serial water turbine generating system, N represents the number of water turbine generating units, K represents a preset prediction step length; representing a discount factor for reflecting the predicted timing weight; 、 And Respectively representing penalty coefficients for constraining the immersion depth difference, the rotation speed difference and the height adjustment amplitude; the submerging depth of the ith water-wheel power generation unit at the current moment is represented; the predicted power of the ith hydroelectric generating unit at the kth predicted time after the current time is represented; And (5) representing the rated power or the maximum attainable power obtained by calibrating history operation data of the ith hydro-power generation unit.
  6. 6. The tandem hydroelectric power generation method of claim 5, wherein the predicted power generation power The method is obtained by a space-time prediction model facing to a topological structure of the serial hydroelectric power generation system, and comprises the following steps: a plurality of hydroelectric generating units are constructed into a serial topological graph which is sequentially connected according to the water flow direction , wherein, Representing node sets corresponding to the hydro-power generation units, and E represents edge sets corresponding to the hydraulic coupling relations between adjacent hydro-power generation units; constructing a node characteristic matrix at a time t Wherein, the A node characteristic vector representing the ith hydro-power generation unit at time t, Representing the parameters of the generated power, The rotation speed parameter is represented by a rotation speed parameter, Represents the depth of immersion; construction of adjacency matrix based on series topology graph G Performing spatial correlation modeling on the node feature matrix based on the adjacency matrix to obtain a spatial feature representation: Wherein, the For the spatial association mapping matrix, Is a nonlinear mapping function; Spatial feature representation based on successive moments Performing timing correlation modeling to obtain a timing characteristic representation: where L represents the history window length, Representing a time sequence feature extraction function; representation based on timing characteristics Obtaining a predicted generated power vector of a kth predicted time in the future: Wherein, the The predicted power of each hydroelectric power generation unit at the predicted time is represented, Mapping a matrix for power prediction.
  7. 7. The method of generating power by tandem water turbine according to claim 6, wherein during system operation, model parameters of the space-time prediction model are adaptively updated according to actual operation results, and the model parameters include: Spatial mapping parameters for spatial correlation modeling ; Power prediction mapping parameters for power prediction mapping ; The adaptive updating specifically includes: After the height adjustment is completed and the water turbine generator enters a stable running state, acquiring the actual power generation power of each water turbine generator unit at the corresponding prediction moment; Comparing the actual power with the predicted power to obtain predicted deviation information; correcting the space mapping parameter and the power prediction mapping parameter based on the prediction deviation information; and after the parameter correction is completed, generating predicted power at a subsequent moment by using the updated model parameters, and participating in a subsequent altitude regulation control process.
  8. 8. The tandem hydroelectric power generation method according to claim 7, wherein the predicted deviation information of each hydroelectric power generation unit at the predicted time is: Wherein, the Is the actual power; The power generation power prediction deviation of the ith water turbine power generation unit at the prediction moment is represented; Based on the prediction bias information, mapping parameters for spatial correlation modeling Power prediction mapping parameters for power prediction mapping Parameter correction is carried out, and the parameter correction comprises the following steps: And Representing the pre-and post-correction power prediction map parameters respectively, Indicating the preset parameter correction factor(s), Representing the time sequence characteristic representation corresponding to the current moment of the ith hydroelectric generating unit; Wherein, the And Representing the spatial mapping parameters before and after correction respectively, Indicating the preset parameter correction factor(s), Representing the prediction bias vector.
  9. 9. A terminal, comprising: The storage is used for storing a serial hydroelectric power generation program; A processor for implementing the steps of the tandem hydroelectric power generation method of any of claims 6 to 8 when executing the tandem hydroelectric power generation program.
  10. 10. A computer readable storage medium storing computer instructions which, when read by a computer in the storage medium, perform the tandem hydro-power generation method of any one of claims 6-8.

Description

Series-type hydroelectric power generation system, method, terminal and medium Technical Field The invention belongs to the technical field of hydroelectric generation, and particularly relates to a serial hydroelectric generation system, a serial hydroelectric generation method, a serial hydroelectric generation terminal and a serial hydroelectric generation medium. Background The water energy is used as a clean and renewable energy source, and has wide application prospect in the scenes of distributed power generation, low-water head water utilization, river channel, irrigation canal, industrial tail water recovery and the like. Along with the diversified development of the water energy utilization scene, due to the restrictions of water resource conditions and engineering arrangement, more and more water-turbine power generation systems adopt a mode of arranging a plurality of water-turbine power generation units in the same water power channel along the water flow direction so as to realize the graded utilization or the repeated utilization of the water energy, thereby improving the comprehensive power generation capacity under the condition of unit water quantity. The existing serial hydroelectric generating device is multi-focused on optimization of the structural form, arrangement mode or single-machine power generation performance of the water wheels. In terms of operation control, control strategies for individual hydro-power generation units are generally employed, for example feedback regulation based on local rotational speed or output power, or maintenance of the hydro-power operation by means of preset fixed operating parameters. The control mode can ensure the stable operation of a single water-wheel power generation unit to a certain extent. Because of the lack of comprehensive sensing and coordination adjustment on the running state of the whole series system, the existing series water turbine generating device is difficult to consider the mutual influence relation among all the water turbine generating units, and particularly, the problems of reduced overall generating efficiency, unbalanced running state, adjustment lag and the like of the series system are caused because part of the water turbine generating units are easily in an non-ideal running interval only by relying on single-point feedback control under the conditions of fluctuation of water flow conditions, channel section change or difference of installation heights of all the water turbines. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a serial hydroelectric power generation system, a serial hydroelectric power generation method, a serial hydroelectric power generation terminal and a serial hydroelectric power generation medium, which are used for solving the problems that the prior serial hydroelectric power generation device in the background art is difficult to consider the mutual influence relation among hydroelectric power generation units, and when the water flow condition fluctuates, the channel section changes or the installation height of each water wheel is different, the serial hydroelectric power generation device is only dependent on single-point feedback control, and is easy to cause that part of hydroelectric power generation units are in non-ideal operation intervals, so that the overall power generation efficiency of the serial system is reduced, the operation state is unbalanced or the adjustment is lagged. The technical scheme adopted by the invention is as follows: In a first aspect, the present application provides a series hydroelectric power generation system comprising: A semi-open hydraulic channel for forming a water flow flowing in a predetermined direction; the water turbine power generation units are at least provided with two water turbine power generation units and are sequentially arranged in series along the water flow direction, and each water turbine power generation unit comprises a water turbine arranged vertically, a generator connected with the water turbine and a mounting structure for supporting the water turbine and the generator; the height adjusting mechanism is connected with the mounting structure and is configured to drive the corresponding water turbine generating units to move along the height direction so as to change the submergence depth of the water turbine relative to the water flow; the multisource state sensing unit is arranged on the hydro-power generation unit and is configured to acquire the running state information of the corresponding hydro-power generation unit; The control unit is electrically connected with each height adjusting mechanism and each multi-source state sensing unit and is configured to: Generating a height adjustment control command corresponding to at least one hydro-power generation unit based on the operational status information from all hydro-power generation units; and controlling the corresponding hei