Parameter optimization method and system for double-adjustment water-turbine generator set

Abstract

The invention belongs to the field of hydroelectric generation, and particularly relates to a parameter optimization method and system for a double-adjustment water-turbine generator set, and the method comprises the steps: determining an adjustment index for parameter optimization of the generator set according to an operation interval; according to the blade opening degree corresponding to the original joint working condition point, the blade opening degree is increased or decreased with the blade opening degree as the center, and the optimal blade opening degree and the optimal guide blade opening degree are obtained; obtaining a first guide vane opening degree and a second guide vane opening degree which are adjacent to the optimal guide vane opening degree by a preset opening degree; according to the first guide vane opening degree, the second guide vane opening degree and the original combination curve, the first paddle opening degree and the second paddle opening degree are obtained, and then the optimal paddle opening degree is kept unchanged in combination with the first guide vane opening degree, the second guide vane opening degree, the first combination curve and the second combination curve; and correcting the blade opening degrees of the first combination curve and the second combination curve by adopting an interpolation method. The method has the effects that the joint curve can be optimized according to the actual working condition, and the generating capacity of the hydroelectric generating set is improved.

Description

Technical Field

[0001] The invention belongs to the field of hydropower generation, and in particular relates to a method and system for optimizing parameters of a dual-regulation hydro-generator set. Background Art

[0002] The dual-regulation units include axial-flow propeller-type and bulb-type cross-flow turbine generator sets. Both types of units require the coordinated cooperation of guide vanes and propeller blades during the load regulation process to achieve the highest water energy conversion efficiency and optimal unit stability under the corresponding working conditions.

[0003] In actual use, due to model test deviations, inaccurate measurement or setting of the real machine head, real machine manufacturing and installation deviations and other reasons, the unit does not operate under the optimal coordination relationship, which seriously affects the efficiency and operation stability of the unit. Therefore, it is necessary to optimize the parameters of the hydropower unit so that it can operate under the optimal coordination relationship.

[0004] In the related technology, in order to understand whether the coordination relationship is adapted to the actual operation requirements of the unit, at a certain fixed water head, the coordination optimization of the hydropower unit adopts the adjustment method of fixed blades adjusting guide vanes or fixed guide vanes adjusting paddle blades. During the adjustment process of the guide vanes or paddle blades, the series coordination relationship under a certain fixed water head is obtained according to the unidirectional change trend of relative efficiency based on the unit power, the differential pressure at the inlet and outlet measuring points of the flow channel, the differential pressure at the high and low pressure measuring points of the flow, the unit stability index and other data. The conventionally set series coordination relationship of adjacent water heads changes according to a unidirectional decreasing or increasing trend, and is adjusted within the respective range of each coordination curve.

[0005] Regarding the above-mentioned related technologies, due to the traditional adjustment method, the adjustment is made within the respective range, resulting in the coordination relationship of a certain operating point being unable to intersect with the coordination relationship curve of the adjacent water head. The final optimized operating points are not necessarily the optimal coordination points, and there is still room for further optimization and improvement of the unit load. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a method and system for optimizing parameters of a dual-regulation hydro-turbine generator set, which can optimize the coordination curve according to actual working conditions and improve the power generation of the hydro-turbine generator set.

[0007] A method for optimizing parameters of a dual-regulation hydro-generator set, comprising:

[0008] Determine the operating range of the current water head of the hydropower unit, wherein the operating range includes a high water head operating range and a medium and low water head operating range;

[0009] Determining adjustment indicators for optimizing parameters of the generator set according to the operating range;

[0010] Obtain a first symmetric curve corresponding to a first water head adjacent to a current water head, a second symmetric curve corresponding to a second water head, and an original symmetric curve of the current water head, wherein the first water head is smaller than the current water head, and the second water head is larger than the current water head;

[0011] Obtaining the blade opening corresponding to the original synergy operating point according to the original synergy curve;

[0012] Taking the blade opening as the center, increasing the blade opening or decreasing the blade opening to obtain an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index;

[0013] Obtaining a first guide vane opening and a second guide vane opening adjacent to a preset opening of the optimal guide vane opening;

[0014] Obtaining a first blade opening and a second blade opening according to the first guide vane opening, the second guide vane opening and an original synergy curve;

[0015] According to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve and the second symmetric curve, the optimal blade opening is kept unchanged, and the blade openings of the first symmetric curve and the second symmetric curve are corrected by using an interpolation method.

[0016] Specifically, the parameter optimization of the hydro-turbine generator set in the present application is to optimize the blade opening.

[0017] Optionally, determining the adjustment index for optimizing the generator set parameters according to the operating range includes:

[0018] When the operation range is a medium-low water head operation range, the adjustment index is that the power of the hydropower unit is maximum;

[0019] When the operating range is a high head operating range, the adjustment index is that the efficiency of the hydropower unit is the highest.

[0020] Optionally, obtaining a first guide vane opening and a second guide vane opening of preset openings adjacent to the optimal guide vane opening includes:

[0021] The optimal guide vane opening is added to the preset opening to obtain the first guide vane opening;

[0022] The second guide vane opening is obtained by subtracting the preset opening from the optimal guide vane opening.

[0023] Optionally, obtaining the first blade opening and the second blade opening according to the first guide vane opening, the second guide vane opening and an original synergy curve includes:

[0024] Substituting the first guide vane opening into the original synergy curve to obtain a first blade opening;

[0025] Substituting the second guide vane opening into the original symmetric curve, the second blade opening is obtained.

[0026] Optionally, the maintaining the optimal blade opening unchanged according to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve, and the second symmetric curve, and correcting the blade openings of the first symmetric curve and the second symmetric curve by interpolation method comprises:

[0027] According to the interpolation method, an interpolation formula is obtained;

[0028] Obtaining a first blade opening to be adjusted and a second blade opening to be adjusted according to the first guide vane opening, the first symmetric curve, and the second symmetric curve;

[0029] According to the second guide vane opening, the first symmetric curve and the second symmetric curve, a third blade opening to be adjusted and a fourth blade opening to be adjusted are obtained;

[0030] Calculate a first water head distance between the current water head and the water head corresponding to the first symmetric curve and a second water head distance between the current water head and the water head corresponding to the second symmetric curve;

[0031] If the first water head distance is less than the second water head distance, an interpolation formula is used to adjust the third blade opening to be adjusted, the fourth blade opening to be adjusted, the first blade opening to be adjusted, and the second blade opening to be adjusted, and the adjustment range of the first blade opening to be adjusted and the second blade opening to be adjusted is greater than the third blade opening to be adjusted and the fourth blade opening to be adjusted;

[0032] If the first water head distance is smaller than the second water head distance of the third blade opening to be adjusted, the interpolation formula is used to adjust the third blade opening to be adjusted, the fourth blade opening to be adjusted, the first blade opening to be adjusted and the second blade opening to be adjusted, and the adjustment range of the first blade opening to be adjusted and the second blade opening to be adjusted is smaller than the third blade opening to be adjusted and the fourth blade opening to be adjusted.

[0033] Optionally, the interpolation formula includes:

[0034]

[0035] Among them, H is the current water head, H j-1 is the second water head, H j+1 is the first water head, B2 is the second blade opening, B1 is the first blade opening, B 21 is the first blade opening to be adjusted, B 11 is the second blade opening to be adjusted, B 22The fourth blade opening to be adjusted, B 12 is the third blade opening to be adjusted, G0 is the guide vane opening corresponding to the original coordinated operating point, G1 is the first water head, and G2 is the second water head.

[0036] Optionally, taking the blade opening as the center, increasing the blade opening or decreasing the blade opening to obtain an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index includes:

[0037] Taking the blade opening as the center, obtaining the stability index of the hydropower unit during the process of increasing or decreasing the blade opening;

[0038] If the stability value index of the hydropower unit changes suddenly, the increase or decrease of the blade opening is stopped to obtain the current optimized range;

[0039] Obtaining an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index according to the optimized range;

[0040] The stability index includes the vibration amount of the top cover, the vibration amount of the load-bearing frame and the vibration amount of the water-guided bearing.

[0041] A dual-regulation hydro-generator set parameter optimization system, comprising:

[0042] A determination module, used to determine the operating range of the current water head of the hydropower unit, wherein the operating range includes a high water head operating range and a medium and low water head operating range;

[0043] A judgment module, used to determine the adjustment index for optimizing the parameters of the generator set according to the operating range;

[0044] A first acquisition module is used to acquire a first symmetric curve corresponding to a first water head adjacent to a current water head, a second symmetric curve corresponding to a second water head, and an original symmetric curve of the current water head, wherein the first water head is smaller than the current water head, and the second water head is larger than the current water head;

[0045] A first matching module, configured to obtain a blade opening corresponding to an original coordinated operating point according to the original coordinated curve;

[0046] A second matching module is used to increase or decrease the blade opening with the blade opening as the center, so as to obtain an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index;

[0047] A second acquisition module is used to acquire a first guide vane opening and a second guide vane opening of adjacent preset openings of the optimal guide vane opening;

[0048] A third matching module, configured to obtain a first blade opening and a second blade opening according to the first guide vane opening, the second guide vane opening and an original synergy curve;

[0049] A correction module is used to keep the optimal blade opening unchanged according to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve and the second symmetric curve, and to correct the blades of the first symmetric curve and the second symmetric curve by using an interpolation method.

[0050] A terminal device includes a memory and a processor. The memory stores a computer program that can be run on the processor. When the processor loads and executes the computer program, a method for optimizing parameters of a dual-regulation hydro-generator set is adopted.

[0051] A computer-readable storage medium stores a computer program. When the computer program is loaded and executed by a processor, a method for optimizing parameters of a dual-regulation hydro-turbine generator set is adopted.

[0052] The beneficial effects of the present invention are as follows: different adjustment indicators are selected according to different operating ranges of the hydropower unit, and the blade opening corresponding to the original coordinated operating point of the current water head is obtained, and then the blade opening is increased or reduced with this as the center to obtain the optimal blade opening and the optimal guide vane opening corresponding to the optimal adjustment indicator, and then the adjacent first guide vane opening and the second guide vane opening are obtained according to the optimal guide vane opening, and the first guide vane opening and the second guide vane opening are combined with the first coordinated curve and the second coordinated curve according to the first guide vane opening and the second guide vane opening, and the interpolation method is used to correct the blade opening of the first coordinated curve and the second coordinated curve in principle of maintaining the optimal blade opening. Compared with the traditional adjustment method, as long as the stability of the hydropower unit does not change suddenly during the adjustment process, it is not necessary to consider whether the coordinated curves cross, so as to find the optimal coordinated operating point and improve the power generation of the hydropower unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic diagram of the synergy curve of the present invention;

[0054] Figure 2 This is a schematic diagram of the interpolation method used in the present invention to correct the synergy curve. DETAILED DESCRIPTION

[0055] A method for optimizing parameters of a dual-regulation hydro-generator set, comprising:

[0056] S1. Determine the current water head operating range of the hydropower unit, the operating range including a medium-high water head operating range and a low water head operating range.

[0057] S2. Determine the adjustment index for optimizing the generator set parameters according to the operating range.

[0058] According to the operating range, the adjustment indicators for optimizing the generator set parameters include:

[0059] When the operating range is the low head operating range, the adjustment index is that the power of the hydropower unit is maximum.

[0060] When the operating range is the medium and high head operating range, the adjustment index is the highest efficiency of the hydropower unit.

[0061] Specifically, in the medium and high head operation range of the hydropower units, the optimization goal is to achieve the optimal relative efficiency of the units because the water inflow from the reservoir cannot meet the full power demand of all units in the power station. However, in the low head operation range of the hydropower units, the optimization goal is to maximize the unit power because of the large water inflow from the reservoir.

[0062] The dividing line between the medium-high head and the low head of the hydropower unit is the critical water abandonment head of the power station. After the hydropower station is established, the dividing line becomes a fixed value.

[0063] S3. Obtain a first symmetric curve corresponding to a first water head adjacent to the current water head, a second symmetric curve corresponding to a second water head, and an original symmetric curve of the current water head, wherein the first water head is smaller than the current water head, and the second water head is larger than the current water head.

[0064] Specifically, after the hydropower unit is built, the hydropower unit has a coordination curve given by the manufacturer. The coordination curve describes the coordination relationship between the guide vanes and the blades of the hydropower unit under a certain water head. The coordination curve is as follows: Figure 1 shown.

[0065] S4. Obtain the blade opening corresponding to the original coordinated operating point according to the original coordinated curve.

[0066] Specifically, the coordinated operating point describes the performance of the unit at a certain fixed blade opening and guide vane opening under given head and flow conditions. The performance is usually evaluated in terms of power or efficiency.

[0067] S5. With the blade opening as the center, increase the blade opening or decrease the blade opening to obtain the optimal blade opening and the optimal guide vane opening corresponding to the optimal adjustment index.

[0068] Taking the blade opening as the center, increasing or decreasing the blade opening, the optimal blade opening and the optimal guide vane opening corresponding to the optimal adjustment index include:

[0069] Taking the blade opening as the center, the stability index of the hydropower unit is obtained during the process of increasing or decreasing the blade opening.

[0070] If the stability index of the hydropower unit changes suddenly, the increase or decrease of the blade opening is stopped to obtain the current optimized range.

[0071] The optimal blade opening and the optimal guide vane opening corresponding to the optimal adjustment index are obtained according to the optimized range.

[0072] Stability indicators include the vibration of the top cover, the vibration of the load-bearing frame, and the vibration of the water-guided bearing.

[0073] Specifically, during the optimization process, the blade opening cannot be increased or decreased continuously. During the adjustment process, if the stability index changes suddenly or exceeds the standard, changes suddenly to a large range or increases exponentially, even if the optimal adjustment index is not reached, it is necessary to stop the adjustment and optimize within the optimized range. The optimized range is the range with the optimal blade opening as the center, where the blade opening is increased or decreased and the unit stability index does not change suddenly.

[0074] S6. Obtain a first guide vane opening and a second guide vane opening that are adjacent to a preset opening of the optimal guide vane opening.

[0075] Obtaining a first guide vane opening and a second guide vane opening adjacent to a preset opening of the optimal guide vane opening includes:

[0076] The optimal guide vane opening is added to the preset opening to obtain the first guide vane opening.

[0077] The optimal guide vane opening minus the preset opening can obtain the second guide vane opening.

[0078] Specifically, the specific value of the preset opening can be set by oneself, usually 5% to 10%, that is, with the optimal guide vane opening as the center, the two guide vane openings adjacent to it on the left and right with a preset opening difference are the first guide vane opening and the second guide vane opening.

[0079] S7. Obtain a first blade opening and a second blade opening according to the first guide vane opening, the second guide vane opening and the original synergy curve.

[0080] According to the first guide vane opening, the second guide vane opening and the original synergy curve, the first blade opening and the second blade opening are obtained including:

[0081] Substitute the first guide vane opening into the original symmetric curve to obtain the first blade opening.

[0082] Substitute the second guide vane opening into the original symmetric curve to obtain the second blade opening.

[0083] S8. According to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve and the second symmetric curve, the optimal blade opening is kept unchanged, and the blade openings of the first symmetric curve and the second symmetric curve are corrected by using an interpolation method.

[0084] like Figure 2As shown, according to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve and the second symmetric curve, the optimal blade opening is kept unchanged, and the blade opening of the first symmetric curve and the second symmetric curve are corrected by interpolation method, including:

[0085] According to the interpolation method, the interpolation formula is obtained.

[0086] According to the first guide vane opening, the first symmetric curve and the second symmetric curve, a first blade opening to be adjusted and a second blade opening to be adjusted are obtained.

[0087] According to the second guide vane opening, the first symmetric curve and the second symmetric curve, the third blade opening to be adjusted and the fourth blade opening to be adjusted are obtained.

[0088] A first water head distance between the current water head and the water head corresponding to the first symmetric curve and a second water head distance between the current water head and the water head corresponding to the second symmetric curve are calculated.

[0089] If the first water head distance is smaller than the second water head distance, the interpolation formula is used to adjust the third blade opening to be adjusted, the fourth blade opening to be adjusted, the first blade opening to be adjusted and the second blade opening to be adjusted, and the adjustment range of the first blade opening to be adjusted and the second blade opening to be adjusted is greater than the third blade opening to be adjusted and the fourth blade opening to be adjusted.

[0090] If the first water head distance is smaller than the second water head distance of the third blade opening to be adjusted, the interpolation formula is used to adjust the third blade opening to be adjusted, the fourth blade opening to be adjusted, the first blade opening to be adjusted and the second blade opening to be adjusted, and the adjustment range of the first blade opening to be adjusted and the second blade opening to be adjusted is smaller than the third blade opening to be adjusted and the fourth blade opening to be adjusted.

[0091] Specifically, during adjustment, the symmetric curve corresponding to the water head that is closer to the current water head has a relatively greater influence during optimization. Therefore, if the first water head distance is smaller than the second water head distance, the first symmetric curve is mainly used for adjustment, that is, the adjustment ranges of the first and second blade openings to be adjusted are larger than the third and fourth blade openings to be adjusted, and the specific value of the adjustment range can be set by itself. If the first water head distance is larger than the second water head distance, the second symmetric curve is mainly used for adjustment, and the adjustment ranges of the third and fourth blade openings to be adjusted are larger.

[0092] The interpolation formula includes:

[0093]

[0094] Among them, H is the current water head, H j-1 is the second water head, H j+1is the first water head, B2 is the second blade opening, B1 is the first blade opening, B 21 is the first blade opening to be adjusted, B 11 is the second blade opening to be adjusted, B 22 The fourth blade opening to be adjusted, B 12 is the third blade opening to be adjusted, G0 is the guide vane opening corresponding to the original coordinated operating point, G1 is the first water head, and G2 is the second water head.

[0095] During the optimization process, the association curve corresponding to the water head closer to the current water head is optimized first, and the guide vane opening is optimized from small to large.

[0096] Table 1 shows the adjusted blade opening when optimizing the coordination curve of the hydropower unit.

[0097] Table 1

[0098]

[0099] After the optimization of the coordination curve is completed, the order of the output of the power station's units in the medium and high head section is clarified according to the change trend of the optimal area of ​​the medium and high head efficiency of each unit, and the power differences of the units under the same guide blades and head conditions. On the premise of ensuring the safe and stable operation of the units, when the upstream water flow is less than the full flow of a unit, the unit with the best output performance is started first, and so on, to further guide the power station to carry out differentiated optimization scheduling and startup sequence between units.

[0100] The water head of the hydropower unit of the double-regulation unit should be measured by the differential pressure between the flow channel inlet and the tailwater pipe outlet, the difference between the tailwater level behind the trash rack and the downstream, etc. The collected water head of the speed regulator can effectively eliminate the influence of the unstable grid pressure caused by the siltation of the trash rack at the water inlet, and improve the accuracy of the water head collection.

[0101] Compared with the traditional adjustment method, the present application will cause the calculation logic error of the unit speed regulator CPU (the denominator is 0 when crossing) if the coordination curve crosses during the optimization process, thus causing the optimization failure. In the present application, H j-1 , H and H j+1 There will be no equality, so the denominator will not be 0, so the optimization range is wider and the optimization effect is better.

[0102] A dual-regulation hydro-generator set parameter optimization system, comprising:

[0103] A determination module, used to determine the operating range of the current water head of the hydropower unit, wherein the operating range includes a high water head operating range and a medium and low water head operating range;

[0104] A judgment module, used to determine the adjustment index for optimizing the parameters of the generator set according to the operating range;

[0105] A first acquisition module is used to acquire a first symmetric curve corresponding to a first water head adjacent to a current water head, a second symmetric curve corresponding to a second water head, and an original symmetric curve of the current water head, wherein the first water head is smaller than the current water head, and the second water head is larger than the current water head;

[0106] A first matching module, configured to obtain a blade opening corresponding to an original coordinated operating point according to the original coordinated curve;

[0107] A second matching module is used to increase or decrease the blade opening with the blade opening as the center, so as to obtain an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index;

[0108] A second acquisition module is used to acquire a first guide vane opening and a second guide vane opening of adjacent preset openings of the optimal guide vane opening;

[0109] A third matching module, configured to obtain a first blade opening and a second blade opening according to the first guide vane opening, the second guide vane opening and an original synergy curve;

[0110] A correction module is used to keep the optimal blade opening unchanged according to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first association curve and the second association curve, and to correct the blade opening of the first association curve and the second association curve by using an interpolation method.

[0111] The embodiment of the present application also discloses a terminal device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor loads and executes the computer program, a method for optimizing the parameters of a dual-regulation hydro-turbine generator set is adopted.

[0112] The terminal device may be a computer device such as a desktop computer, a laptop computer or a cloud server, and the terminal device includes but is not limited to a processor and a memory. For example, the terminal device may also include input and output devices, a network access device and a bus.

[0113] Among them, the processor can adopt a central processing unit (CPU). Of course, according to actual usage, other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. can also be adopted. The general-purpose processor can adopt a microprocessor or any conventional processor, etc., and this application does not impose any restrictions on this.

[0114] Among them, the memory can be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device, or it can be an external storage device of the terminal device, such as a plug-in hard disk, a smart memory card (SMC), a secure digital card (SD) or a flash memory card (FC) equipped on the terminal device, etc., and the memory can also be a combination of an internal storage unit and an external storage device of the terminal device. The memory is used to store computer programs and other programs and data required by the terminal device. The memory can also be used to temporarily store data that has been output or is to be output, and this application does not impose any restrictions on this.

[0115] Among them, through this terminal device, a dual-regulation hydro-turbine generator set parameter optimization method in the above embodiment is stored in the memory of the terminal device, and is loaded and executed on the processor of the terminal device for easy use.

[0116] An embodiment of the present application further discloses a computer-readable storage medium, and the computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, a parameter optimization method of a dual-regulation hydro-turbine generator set in the above embodiment is adopted.

[0117] Among them, the computer program can be stored in a computer-readable medium, the computer program includes computer program code, the computer program code can be in the form of source code, object code, executable file or certain middleware, etc. The computer-readable medium includes any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the computer-readable medium includes but is not limited to the above-mentioned components.

[0118] Among them, through this computer-readable storage medium, a dual-regulation hydro-turbine generator set parameter optimization method in the above embodiment is stored in a computer-readable storage medium, and is loaded and executed on a processor to facilitate the storage and application of the above method.

[0119] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as above, which are not provided in detail for the sake of simplicity.

[0120] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A method for optimizing parameters of a dual-regulation hydro-generator set, characterized in that: include: Determine the operating range of the current water head of the hydropower unit, wherein the operating range includes a medium-high water head operating range and a low water head operating range; Determining adjustment indicators for optimizing parameters of the generator set according to the operating range; Obtain a first symmetric curve corresponding to a first water head adjacent to a current water head, a second symmetric curve corresponding to a second water head, and an original symmetric curve of the current water head, wherein the first water head is smaller than the current water head, and the second water head is larger than the current water head; Obtaining the blade opening corresponding to the original synergy operating point according to the original synergy curve; Taking the blade opening corresponding to the original coordinated operating point as the center, increasing or decreasing the blade opening to obtain the optimal blade opening and the optimal guide vane opening corresponding to the optimal adjustment index; Obtaining a first guide vane opening and a second guide vane opening adjacent to a preset opening of the optimal guide vane opening; Obtaining a first blade opening and a second blade opening according to the first guide vane opening, the second guide vane opening and an original synergy curve; According to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve and the second symmetric curve, the optimal blade opening is kept unchanged, and the blade openings of the first symmetric curve and the second symmetric curve are corrected by using an interpolation method.

2. A method for optimizing parameters of a dual-regulation hydro-generator set as claimed in claim 1, characterized in that: Determining the adjustment index for optimizing the parameters of the generator set according to the operating range includes: When the operation interval is a low head operation interval, the adjustment index is that the power of the hydropower unit is maximum; When the operating range is a medium-high head operating range, the adjustment index is that the efficiency of the hydropower unit is the highest.

3. A method for optimizing parameters of a dual-regulation hydro-generator set as claimed in claim 1, characterized in that: The step of obtaining a first guide vane opening and a second guide vane opening adjacent to a preset opening of the optimal guide vane opening comprises: The optimal guide vane opening is added to the preset opening to obtain the first guide vane opening; The second guide vane opening is obtained by subtracting the preset opening from the optimal guide vane opening.

4. The method for optimizing parameters of a dual-regulation hydro-generator set according to claim 1, characterized in that: The obtaining of the first blade opening and the second blade opening according to the first guide vane opening, the second guide vane opening and the original synergy curve comprises: Substituting the first guide vane opening into the original synergy curve to obtain a first blade opening; Substituting the second guide vane opening into the original symmetric curve, the second blade opening is obtained.

5. The method for optimizing parameters of a dual-regulation hydro-generator set according to claim 1, characterized in that: The method of maintaining the optimum blade opening unchanged according to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first symmetric curve and the second symmetric curve, and correcting the blade opening of the first symmetric curve and the second symmetric curve by interpolation method comprises: According to the interpolation method, an interpolation formula is obtained; Obtaining a first blade opening to be adjusted and a second blade opening to be adjusted according to the first guide vane opening, the first symmetric curve, and the second symmetric curve; According to the second guide vane opening, the first symmetric curve and the second symmetric curve, a third blade opening to be adjusted and a fourth blade opening to be adjusted are obtained; Calculate a first water head distance between the current water head and the water head corresponding to the first symmetric curve and a second water head distance between the current water head and the water head corresponding to the second symmetric curve; If the first water head distance is less than the second water head distance, an interpolation formula is used to adjust the third blade opening to be adjusted, the fourth blade opening to be adjusted, the first blade opening to be adjusted, and the second blade opening to be adjusted, and the adjustment range of the first blade opening to be adjusted and the second blade opening to be adjusted is greater than the third blade opening to be adjusted and the fourth blade opening to be adjusted; If the first water head distance is smaller than the second water head distance of the third blade opening to be adjusted, the interpolation formula is used to adjust the third blade opening to be adjusted, the fourth blade opening to be adjusted, the first blade opening to be adjusted and the second blade opening to be adjusted, and the adjustment range of the first blade opening to be adjusted and the second blade opening to be adjusted is smaller than the third blade opening to be adjusted and the fourth blade opening to be adjusted.

6. The method for optimizing parameters of a dual-regulation hydro-generator set according to claim 5, characterized in that: The interpolation formula includes: Among them, H is the current water head, H j-1 is the second water head, H j+1 is the first water head, B2 is the second blade opening, B1 is the first blade opening, B 21 is the first blade opening to be adjusted, B 11 is the second blade opening to be adjusted, B 22 The fourth blade opening to be adjusted, B 12 is the third blade opening to be adjusted, G0 is the guide vane opening corresponding to the original coordinated operating point, G1 is the first water head, and G2 is the second water head.

7. The method for optimizing parameters of a dual-regulation hydro-generator set according to claim 1, characterized in that: The method of increasing or decreasing the blade opening with the blade opening as the center to obtain the optimal blade opening and the optimal guide vane opening corresponding to the optimal adjustment index includes: Taking the blade opening as the center, obtaining the stability index of the hydropower unit during the process of increasing or decreasing the blade opening; If the stability value index of the hydropower unit changes suddenly, the increase or decrease of the blade opening is stopped to obtain the current optimized range; Obtaining an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index according to the optimized range; The stability index includes the vibration amount of the top cover, the vibration amount of the load-bearing frame and the vibration amount of the water-guided bearing.

8. A dual-regulation hydro-generator parameter optimization system, characterized in that: include: A determination module, used to determine the operating range of the current water head of the hydropower unit, wherein the operating range includes a high water head operating range and a medium and low water head operating range; A judgment module, used to determine the adjustment index for optimizing the parameters of the generator set according to the operating range; A first acquisition module is used to acquire a first symmetric curve corresponding to a first water head adjacent to a current water head, a second symmetric curve corresponding to a second water head, and an original symmetric curve of the current water head, wherein the first water head is smaller than the current water head, and the second water head is larger than the current water head; A first matching module, configured to obtain a blade opening corresponding to an original coordinated operating point according to the original coordinated curve; A second matching module is used to increase or decrease the blade opening with the blade opening as the center, so as to obtain an optimal blade opening and an optimal guide vane opening corresponding to an optimal adjustment index; A second acquisition module is used to acquire a first guide vane opening and a second guide vane opening of adjacent preset openings of the optimal guide vane opening; A third matching module, configured to obtain a first blade opening and a second blade opening according to the first guide vane opening, the second guide vane opening and an original synergy curve; A correction module is used to keep the optimal blade opening unchanged according to the first blade opening, the second blade opening, the first guide vane opening, the second guide vane opening, the first association curve and the second association curve, and to correct the blade opening of the first association curve and the second association curve by using an interpolation method.

9. A terminal device, comprising a memory and a processor, characterized in that: The memory stores a computer program that can be run on the processor, and when the processor loads and executes the computer program, the method according to any one of claims 1 to 7 is adopted.

10. A computer-readable storage medium having a computer program stored therein, characterized in that: When the computer program is loaded and executed by a processor, the method according to any one of claims 1 to 7 is adopted.

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