Ecological flow discharge system

Abstract

The invention discloses an ecological flow discharge system which is applied to a diversion tunnel type hydropower station and comprises a diversion tunnel adit channel, a drainage tunnel adit channel, a drainage tunnel adit channel, a drainage tunnel adit channel, a drainage tunnel adit channel, a drainage tunnel adit channel and a drainage tunnel adit channel, the unit inlet end of the ecological unit is connected with the channel outlet end of the diversion tunnel branch channel, and the ecological unit is used for releasing ecological flow; the two-way dam is arranged on the downstream of the ecological unit, and the two-way dam is used for intercepting water flow discharged by the ecological unit, so that an ecological restoration river reach is formed between the river blocking facility and the two-way dam. According to the embodiment of the invention, the ecological flow discharge of the diversion tunnel type hydropower station is realized, and the ecological and economic benefits are effectively improved. The method can be widely applied to the technical field of water conservancy and hydropower engineering.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy and hydropower engineering, and in particular to an ecological flow discharge system. Background Art

[0002] Small hydropower stations often bring about the problem of insufficient downstream ecological flow due to the need to build dam facilities on natural river channels. Ecological flow refers to the flow (water volume, water level) and process required to meet the ecological protection requirements of the river downstream of the dam facilities of small hydropower stations and maintain the basic structure and function of the ecosystem. For planned or newly built small hydropower stations, ecological spillways, ecological spillways (troughs), ecological spillway valves, ecological siphons, ecological units and other methods are generally preset to discharge ecological flow. Riverbed or dam-type hydropower stations can often guarantee ecological flow by generating electricity through units, while generating economic benefits. In related technologies, some small hydropower stations do not have special buildings for discharging ecological flow, such as water diversion tunnel hydropower stations, which make it difficult to discharge ecological flow.

[0003] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the Invention

[0004] The main purpose of the embodiments of the present application is to propose an ecological flow discharge system that can realize the ecological flow discharge of a water diversion tunnel hydropower station, effectively improving the ecological and economic benefits.

[0005] To achieve the above objectives, one aspect of an embodiment of the present application provides an ecological flow discharge system, which is applied to a diversion tunnel hydropower station. The system includes:

[0006] A diversion tunnel branch tunnel, wherein the channel entrance end of the diversion tunnel branch tunnel is connected to the preset diversion tunnel channel;

[0007] An ecological unit, wherein the unit inlet of the ecological unit is connected to the channel outlet of the branch tunnel of the water diversion tunnel, and the ecological unit is used to discharge ecological flow;

[0008] The second dam is arranged downstream of the ecological unit and is used to intercept the water discharged from the ecological unit to form an ecological restoration river section between the river-blocking facility and the second dam.

[0009] In some embodiments, the system further comprises:

[0010] A water diversion open pipe, which is arranged between the branch tunnel of the water diversion tunnel and the ecological unit, and is used to guide the water flow in the branch tunnel of the water diversion tunnel to the ecological unit;

[0011] A control valve is provided between the branch tunnel of the water diversion tunnel and the water diversion open pipe, and the control valve is used for unit maintenance.

[0012] In some embodiments, the system further comprises:

[0013] A monitoring module is used to monitor the downstream flow of the ecological unit so as to adjust the preset components of the ecological unit according to the downstream flow; wherein the preset components include the unit guide vanes, nozzle needle valves and speed regulators.

[0014] In some embodiments, the monitoring module includes:

[0015] A water level gauge is provided in the reservoir area of ​​the damming facility and is used to dynamically monitor the water head in the reservoir area;

[0016] A current mutual sensing module is provided on the ecological unit and is used to dynamically monitor the unit electric power of the ecological unit.

[0017] In some embodiments, the monitoring module further comprises:

[0018] A preset camera module includes a first camera module and a second camera module. The first camera module is arranged on the ecological unit, and the second camera module is arranged on the second dam. The first camera module is used to obtain the image of the unit's power generation tail water, and the second camera module is used to obtain the image of the dam surface.

[0019] In some embodiments, the steps of setting up the branch tunnel of the diversion tunnel include:

[0020] Calculate the expected channel parameters based on the approved ecological flow parameters and the designed water head parameters; the expected channel parameters include branch hole size and channel length;

[0021] The diversion tunnel branch channel is set according to the desired channel parameters.

[0022] In some embodiments, the second dam setting step includes:

[0023] Acquire preset river channel data; wherein the preset river channel data includes river channel slope and river channel length;

[0024] Desired river dam parameters are calculated based on the river channel slope and the river channel length, so as to set the second dam according to the desired river dam parameters.

[0025] In some embodiments, the calculating of desired dam parameters according to the river channel slope and the river channel length, and setting the second dam according to the desired dam parameters, includes:

[0026] determining expected position data according to the length of the river channel;

[0027] Calculating the expected dam height data according to the river channel length and the river channel slope;

[0028] The second dam is set according to the expected position data and the expected dam height data.

[0029] In some embodiments, the control steps of the eco-unit include:

[0030] The downstream flow rate of the unit is calculated according to the reservoir head, the electric power of the unit and the efficiency of the unit;

[0031] The ecological unit is controlled according to the downstream flow of the unit.

[0032] In some embodiments, controlling the eco-unit according to the downstream flow of the unit includes:

[0033] Analyze the unit's downstream flow rate and a preset flow threshold to obtain desired adjustment data;

[0034] The preset control adjustment is performed by the speed regulator according to the desired adjustment data; wherein the preset control adjustment includes the unit guide vane opening adjustment or the nozzle needle valve position adjustment.

[0035] The embodiments of the present application include at least the following beneficial effects: The present application provides an ecological flow discharge system, which connects the inlet of a diversion tunnel branch to a pre-set diversion tunnel channel, and connects the outlet of the diversion tunnel branch to the inlet of the ecological unit, thereby diverting the water flow in the pre-set diversion tunnel channel to the ecological unit through the diversion tunnel branch. At the same time, the embodiments of the present invention provide a second dam downstream of the ecological unit to intercept the water flow discharged from the ecological unit through the second dam, thereby forming an ecological restoration river section between the river dam and the second dam, thereby achieving ecological flow discharge of the diversion tunnel hydropower station and effectively improving ecological and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a top view of the ecological flow discharge system provided by an embodiment of the present invention;

[0037] Figure 2 is a side view of an ecological flow discharge system provided by an embodiment of the present invention;

[0038] Figure 3 This is a flow chart of Erdaoba parameter calculation provided by an embodiment of the present invention; DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0040] It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0041] The terms "at least one", "plurality", "each", "any", etc. used in this application include "at least one", "two" or more, "plurality" or "each", "any" or "any one", "each" or "any one" as used herein.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0043] Before explaining the embodiments of the present application in detail, some of the nouns and terms involved in the embodiments of the present application are first explained. The nouns and terms involved in the embodiments of the present application are subject to the following explanations.

[0044] Ecological flow refers to the amount of water flow required to maintain the ecological environment within a flow area. It is the minimum flow required to sustain downstream organisms and maintain ecological balance. It is closely related to the health of a river or lake's ecosystem, including sediment transport to maintain stable river channel morphology, pollutant degradation to maintain water quality, and salinity and freshness balance at estuaries.

[0045] Small hydropower stations, because they require the construction of dams on natural river channels, often lead to insufficient downstream ecological flows. Ecological flow refers to the flow (volume and water level) and process required to meet ecological protection requirements for the river channel downstream of the small hydropower station's dams and maintain the basic structure and function of the ecosystem. Diversion-type hydropower stations, for example, construct dams on the river channel and then use diversion facilities to divert water from the reservoir to the power plant for power generation. This creates dewatered sections of the natural river channel between the plant and dam, impacting the ecological environment and resulting in some economic losses. Planned or newly constructed small hydropower stations generally incorporate ecological spillways, ecological spillways (troughs), ecological spillway valves, ecological siphons, and ecological units to release ecological flows. Riverbed or dam-type hydropower stations can often ensure ecological flows through generating units while still generating economic benefits. However, some small hydropower stations, such as those built earlier, lack dedicated structures for releasing ecological flows. This is particularly true for diversion tunnel hydropower stations, which lack ecological flow release facilities and are difficult to retrofit. Furthermore, in addition to implementing ecological flow release facilities, the selection of ecological flow monitoring facilities is equally important. Ecological flow monitoring involves multiple parameters, including flow rate, water level, and unit power output. Therefore, the appropriate monitoring equipment must be selected based on the actual conditions of the ecological flow release facility.

[0046] In view of this, an ecological flow discharge system is provided in an embodiment of the present application. The scheme includes a water diversion tunnel branch tunnel, an ecological unit and a second dam. The water flow is diverted to the ecological unit through the water diversion tunnel branch tunnel, and a second dam is set downstream of the ecological unit to intercept the water flow discharged from the ecological unit through the second dam, so that an ecological restoration river section is formed between the river dam facility and the second dam, realizing the ecological flow discharge of the water diversion tunnel hydropower station and effectively improving the ecological and economic benefits.

[0047] Reference Figure 1 and Figure 2The ecological flow discharge system provided in the embodiment of the present invention is applied to a diversion tunnel type hydropower station, and the system includes a diversion tunnel branch tunnel 140, an ecological unit 170, and a second dam 180. Specifically, in the embodiment of the present invention, the channel entrance end of the diversion tunnel branch tunnel 140 is connected to the preset diversion tunnel channel 130. Among them, the built diversion tunnel type hydropower station includes a river dam facility 120, the upstream of the river dam facility 120 is the reservoir area 110, and the river dam facility 120 is connected to the preset diversion tunnel channel 130. Correspondingly, in the embodiment of the present invention, the channel outlet end of the diversion tunnel branch tunnel 140 is connected to the unit inlet end (i.e., the water flow input end) of the ecological unit 170. In this embodiment of the present invention, a branch tunnel 140 is provided to divert a portion of the water flow from the pre-set diversion tunnel 130 to the ecological generator 170. The diverted water flow is then used by the ecological generator 170 to generate electricity while simultaneously releasing the ecological flow. This ensures the ecological water demand of the downstream river channel while also generating electricity, thereby improving water resource utilization efficiency. Furthermore, this embodiment of the present invention includes a secondary dam 180 downstream of the ecological generator 170. Accordingly, this embodiment of the present invention, by providing the secondary dam 180 downstream of the ecological generator 170, intercepts the water flow from the ecological generator 170, thereby forming an ecological restoration section between the river-blocking structure 120 and the secondary dam 180. It is easy to understand that in this embodiment of the present invention, the branch tunnel 140 diverts water to the ecological generator 170 located near the secondary dam 180. After generating electricity through the ecological generator 170, the water flows upstream of the secondary dam 180, forming an ecological restoration section. The water then overflows the secondary dam 180 into the downstream river channel. The embodiment of the present invention sets a second dam 180 downstream of the river-blocking facility 120 to intercept the water discharged from the ecological unit 170, thereby forming a slow-flow area (ecological restoration river section) between the dam foot of the river-blocking facility 120 and the second dam 180, so that part of the water flows back to the dam foot of the river-blocking facility 120, so that the river channel maintains connectivity, thereby realizing the ecological flow discharge and power generation of the water diversion tunnel hydropower station while realizing the ecological restoration of the river channel, effectively improving the ecological and economic benefits.

[0048] Reference Figure 1 and Figure 2In some embodiments of the present invention, the ecological flow discharge system provided by the present invention further includes a water diversion pipe 160 and a control valve 150. Specifically, in the embodiment of the present invention, the water diversion pipe 160 is arranged between the branch tunnel channel 140 of the water diversion tunnel and the ecological unit 170. Accordingly, the embodiment of the present invention guides the water flow diverted from the branch tunnel channel 140 of the water diversion tunnel to the ecological unit 170 through the water diversion pipe 160. Among them, the ecological unit 170 is arranged at the outlet end of the water diversion pipe 160 and is located upstream of the second dam 180. The embodiment of the present invention can stably transport water from the branch tunnel channel of the water diversion tunnel to the ecological unit 170 by setting up the water diversion pipe 160 to guide the water flow, and can be flexibly arranged to reduce water flow resistance, reduce construction difficulty and cost. Furthermore, in the embodiment of the present invention, the control valve 150 is arranged between the branch tunnel channel 140 of the water diversion tunnel and the water diversion pipe 160. Among them, the control valve 150 in the embodiment of the present invention is used for unit maintenance, that is, it is used when the ecological unit is under maintenance, and is usually in a fully open state.

[0049] It should be noted that, in order to avoid the adverse impact of the newly built tunnel on the safety of the river-blocking facility 120, the embodiment of the present invention sets the branch tunnel channel 140 of the water diversion tunnel outside the management scope of the river-blocking facility 120.

[0050] In some embodiments of the present invention, the eco-flow discharge system provided by the embodiments of the present invention further includes a monitoring module. Specifically, in the embodiments of the present invention, the monitoring module is disposed on the eco-flow unit to dynamically monitor the downstream flow of the eco-flow unit, i.e., monitor the eco-flow. Accordingly, the embodiments of the present invention dynamically adjust preset components of the eco-flow unit based on the monitored downstream flow, such as the unit's guide vane opening, nozzle needle valve position, and speed regulator, thereby achieving closed-loop control of the eco-flow, effectively improving the accuracy and stability of eco-flow discharge.

[0051] In some embodiments of the present invention, the monitoring module provided by the embodiments of the present invention includes a water level meter and a current mutual induction module. Specifically, in the embodiments of the present invention, the water level meter is set in the reservoir area of ​​the dam facility, and the water head in the reservoir area is dynamically monitored by the water level meter set in the reservoir area of ​​the dam facility. At the same time, in the embodiments of the present invention, a current mutual induction module is installed on the ecological unit to dynamically monitor the electric power of the unit through the current mutual induction module. It is easy to understand that the embodiment of the present invention calculates the flow rate discharged by the unit, that is, the ecological flow data, through the reservoir head monitored by the water level meter, the electric power of the unit monitored by the current mutual induction module, and the corresponding unit efficiency, and then adjusts the guide vane opening or the nozzle needle valve position, the speed regulator, etc. of the unit according to the ecological flow data to achieve precise control of the ecological flow discharge.

[0052] In some embodiments of the present invention, the monitoring module provided by the embodiments of the present invention further includes a preset camera module. Specifically, the preset camera module in the embodiments of the present invention includes a first camera module and a second camera module. In the embodiments of the present invention, the first camera module is installed on the ecological turbine unit to capture images of the turbine tailwater through the first camera module, enabling real-time monitoring of the downstream ecological flow. Simultaneously, in the embodiments of the present invention, the second camera module is installed on the Erdao Dam to capture images of the Erdao Dam surface through the second camera module, enabling real-time monitoring of the Erdao Dam surface.

[0053] In some embodiments of the present invention, the steps for setting up the branch tunnel of the diversion tunnel include but are not limited to the following steps:

[0054] Calculations are performed based on the approved ecological flow parameters and design head parameters to obtain the expected channel parameters, which include branch hole size and channel length.

[0055] Set up the branch tunnel channel of the diversion tunnel according to the desired channel parameters.

[0056] In this specific embodiment, the present invention first calculates the desired channel parameters based on the approved ecological flow parameters and the design head parameters to obtain the desired channel parameters. The diversion tunnel branch channels are then configured based on these desired channel parameters. Specifically, the approved ecological flow parameters in this embodiment refer to the minimum flow parameters required to maintain the health of the downstream ecosystem, calculated based on historical hydrological data, ecosystem water requirements, and the corresponding hydraulic engineering characteristics. Furthermore, the design head parameters in this embodiment refer to the highest head position achievable in front of the dam during construction design, which can be determined using hydraulic calculation formulas. Furthermore, the desired channel parameters in this embodiment include branch channel dimensions and channel lengths. It will be readily understood that the present invention calculates the desired branch channel dimensions and channel lengths for the diversion tunnel based on the approved ecological flow parameters and the design head parameters. The branch channel configuration is then performed based on these parameters, effectively improving the matching of the diversion tunnel branch channel configuration, thereby enhancing the stability and reliability of the ecological flow discharge system. It should be noted that in some embodiments of the present invention, the dimensions and length of the diversion open pipe and the installed capacity of the ecological turbine are also calculated based on the approved ecological flow and design head parameters.

[0057] In some embodiments of the present invention, the steps of setting up the second dam include but are not limited to the following steps:

[0058] Obtain preset river channel data, wherein the preset river channel data includes river channel slope and river channel length.

[0059] The desired dam parameters are calculated based on the river slope and river length, so that the second dam can be set according to the desired dam parameters.

[0060] In this specific embodiment, the embodiment of the present invention first obtains preset river channel data, and then calculates the expected dam parameters based on the obtained river channel data, so as to set the second dam through the expected dam parameters. Specifically, the preset river channel data in the embodiment of the present invention includes the river channel slope and the river channel length. Accordingly, the embodiment of the present invention calculates the expected dam parameters of the second dam through the river channel slope and the river channel length. In the embodiment of the present invention, the river channel slope refers to the change in the longitudinal slope of the riverbed, that is, the drop of the river channel per unit length, which is determined by the ratio between the elevation difference within a section of the river channel length and the river channel length. In addition, the river channel length refers to the straight-line distance from the source of the river to a specified section (such as a river dam facility). Accordingly, the embodiment of the present invention calculates the relevant parameters of the second dam (the expected dam parameters) by combining the river channel slope and the river channel length, so that the river channel connectivity can be maintained through the constructed second dam, the stability of the ecological flow discharge can be effectively improved, and the ecological benefits can be improved.

[0061] In some embodiments of the present invention, the desired dam parameters are calculated based on the river gradient and the river length, and the second dam is set according to the desired dam parameters, including but not limited to the following steps:

[0062] Determine the expected location data based on the length of the river channel.

[0063] The expected dam height data is calculated based on the river length and river slope.

[0064] The second dam is set up according to the expected position data and the expected dam height data.

[0065] In this specific embodiment, the embodiment of the present invention first determines the expected position data based on the length of the river channel, and calculates the expected dam height data based on the river channel length and the river channel slope, so as to set the second dam based on the expected position data and the expected dam height data. Specifically, the expected river dam parameters in the embodiment of the present invention include the setting position (expected position data) and dam height (expected dam height data) of the second dam. Among them, the setting position of the second dam in the embodiment of the present invention is determined by the length of the river channel. At the same time, the embodiment of the present invention determines the expected height of the second dam by multiplying the river channel length by the river channel slope. For example, when the river channel slope (river channel slope) is 0.025, that is, the river channel elevation drops by 2.5 meters within 100 meters, the calculation process is as follows Figure 3 As shown. If the height of the secondary dam is set to be flush with the elevation of the upstream dam's toe, the water surface will extend horizontally under still water conditions, covering the elevation of the upstream dam's toe. Therefore, based on the above conditions, this embodiment of the present invention assumes that a secondary dam with a height of no less than 2.5 meters and the same width as the river channel is installed 100 meters downstream of the dam structure. This ensures that the water surface returns to the toe of the dam structure, maintaining river connectivity.

[0066] In some embodiments of the present invention, the control steps of the eco-unit include but are not limited to the following steps:

[0067] The unit downstream flow is calculated based on the reservoir head, unit electrical power and unit efficiency.

[0068] The ecological unit is controlled according to the downstream flow of the unit.

[0069] In this specific embodiment, the embodiment of the present invention calculates the unit discharge flow rate by monitoring the reservoir head, unit power, and unit efficiency, and then controls the ecological unit according to the unit discharge flow rate. Specifically, the unit efficiency in the embodiment of the present invention is selected according to the actual situation. For example, the embodiment of the present invention adopts the unit flow measurement formula shown in the following formula (1):

[0070] Q i =N i / 9.8η i h (1)

[0071] Among them, Q i Indicates the power generation flow of the i-th unit, in cubic meters per second (m 3 / s), N i represents the electric power of the i-th unit in kilowatts (kW), η i represents the efficiency of the i-th unit, h represents the measured water head, that is, the reservoir head, in meters (m).

[0072] Accordingly, embodiments of the present invention control the eco-unit based on the calculated unit downstream flow rate. For example, embodiments of the present invention compare and analyze the unit downstream flow rate with the desired eco-flow rate to determine an adjustment plan for the eco-unit, thereby achieving closed-loop control of the eco-unit and effectively improving the accuracy and stability of eco-flow discharge.

[0073] In some embodiments of the present invention, controlling the eco-unit according to the downstream flow of the unit includes but is not limited to the following steps:

[0074] Analyze the unit's downstream flow rate and the preset flow threshold to obtain the expected adjustment data.

[0075] The governor performs preset control adjustments based on the desired adjustment data, wherein the preset control adjustments include the unit guide vane opening adjustment or the nozzle needle valve position adjustment.

[0076] In this specific embodiment, the embodiment of the present invention first analyzes the unit downstream flow and the preset flow threshold to obtain the expected adjustment data, and then performs preset control adjustment through the speed regulator in the ecological unit according to the expected adjustment data. Specifically, the preset flow threshold in the embodiment of the present invention refers to the expected value of the ecological flow. Accordingly, the embodiment of the present invention compares and analyzes the unit downstream flow and the preset flow threshold, thereby calculating the expected adjustment data of the ecological unit, such as the expected opening of the unit guide vane, the expected position of the nozzle needle valve, etc. Then, the embodiment of the present invention adjusts the unit guide vane opening and the nozzle needle valve position through the speed regulator based on the expected adjustment data, thereby adjusting the ecological flow discharged from the unit, effectively improving the accuracy of the ecological flow discharge, and improving the ecological and economic benefits.

[0077] It is easy to understand that the embodiments of the present invention meet the requirements of ecological environmental protection without changing the existing dam facilities by deploying ecological flow discharge facilities, and do not affect the operational safety of the dam facilities, while generating economic benefits. It effectively alleviates the problem of discharging ecological flow from the existing water diversion tunnel hydropower station, can realize the ecological flow discharge, and has good ecological and economic benefits.

[0078] The embodiments described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0079] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0080] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0081] Those skilled in the art will appreciate that all or some of the steps in the methods, systems, and functional modules / units in the devices disclosed above may be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0082] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0083] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0085] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0086] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0087] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.

Claims

1. An ecological flow discharge system, characterized in that: Applied to a diversion tunnel hydropower station, the system includes: A diversion tunnel branch tunnel, wherein the channel entrance end of the diversion tunnel branch tunnel is connected to the preset diversion tunnel channel; An ecological unit, wherein the unit inlet of the ecological unit is connected to the channel outlet of the branch tunnel of the water diversion tunnel, and the ecological unit is used to discharge ecological flow; The second dam is arranged downstream of the ecological unit and is used to intercept the water discharged from the ecological unit to form an ecological restoration river section between the river-blocking facility and the second dam.

2. The system according to claim 1, wherein: The system further comprises: A water diversion open pipe, which is arranged between the branch tunnel of the water diversion tunnel and the ecological unit, and is used to guide the water flow in the branch tunnel of the water diversion tunnel to the ecological unit; A control valve is provided between the branch tunnel of the water diversion tunnel and the water diversion open pipe, and the control valve is used for unit maintenance.

3. The system according to claim 1, wherein: The system further comprises: A monitoring module is used to monitor the downstream flow of the ecological unit so as to adjust the preset components of the ecological unit according to the downstream flow; wherein the preset components include the unit guide vanes, nozzle needle valves and speed regulators.

4. The system according to claim 3, characterized in that The monitoring module includes: A water level gauge is provided in the reservoir area of ​​the damming facility and is used to dynamically monitor the water head in the reservoir area; A current mutual sensing module is provided on the ecological unit and is used to dynamically monitor the unit electric power of the ecological unit.

5. The system according to claim 4, characterized in that The monitoring module also includes: A preset camera module includes a first camera module and a second camera module. The first camera module is arranged on the ecological unit, and the second camera module is arranged on the second dam. The first camera module is used to obtain the image of the unit's power generation tail water, and the second camera module is used to obtain the image of the dam surface.

6. The system according to claim 1, wherein: The steps of setting up the branch tunnel of the diversion tunnel include: Calculate the expected channel parameters based on the approved ecological flow parameters and the designed water head parameters; the expected channel parameters include branch hole size and channel length; The diversion tunnel branch channel is set according to the desired channel parameters.

7. The system according to claim 1, wherein: The steps of setting up the second dam include: Acquire preset river channel data; wherein the preset river channel data includes river channel slope and river channel length; Desired river dam parameters are calculated based on the river channel slope and the river channel length, so as to set the second dam according to the desired river dam parameters.

8. The system according to claim 7, characterized in that The step of calculating desired dam parameters according to the river channel slope and the river channel length, and setting the second dam according to the desired dam parameters, includes: determining expected position data according to the length of the river channel; Calculating the expected dam height data according to the river channel length and the river channel slope; The second dam is set according to the expected position data and the expected dam height data.

9. The system according to claim 4, wherein: The control steps of the ecological unit include: The downstream flow rate of the unit is calculated according to the reservoir head, the electric power of the unit and the efficiency of the unit; The ecological unit is controlled according to the downstream flow of the unit.

10. The system according to claim 9, characterized in that The controlling of the ecological unit according to the downstream flow of the unit includes: Analyze the unit's downstream flow rate and a preset flow threshold to obtain desired adjustment data; The preset control adjustment is performed by the speed regulator according to the desired adjustment data; wherein the preset control adjustment includes the unit guide vane opening adjustment or the nozzle needle valve position adjustment.

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