Method for determining opening pulse width of guide vane of hydroelectric generating set and related device

Abstract

The invention discloses a guide vane opening pulse width determination method of a hydroelectric generating set and a related device, and the method comprises the steps: obtaining an initial working condition corresponding to a target hydroelectric generating set and a target active power adjustment instruction under the initial working condition, determining n guide vane opening pulse widths corresponding to the target hydroelectric generating set based on the initial working condition and the target active power adjustment instruction, and determining n groups of adjustment data corresponding to the target hydroelectric generating set under the adjustment action of the n guide vane opening pulse widths, determining a pulse adjustment effect degree value corresponding to each guide vane opening degree pulse width in the n guide vane opening degree pulse widths based on the n groups of adjustment data, obtaining n pulse adjustment effect degree values, determining a maximum value in the n pulse adjustment effect degree values, obtaining a target pulse adjustment effect degree value, and obtaining the target pulse adjustment effect degree value. And the guide vane opening pulse width corresponding to the target pulse adjusting effect degree value is determined, and the target guide vane opening pulse width is obtained. By adopting the embodiment of the invention, the accuracy of active power adjustment of the hydroelectric generating set is improved.

Description

Technical Field

[0001] This invention relates to the field of hydropower technology, and in particular to a method and related apparatus for determining the guide vane opening pulse width of a hydropower unit. Background Technology

[0002] As a crucial power source in the power system, the active power regulation performance of hydropower units directly impacts grid frequency stability and power supply quality. The guide vane opening pulse width is the core command controlling the active power regulation of hydropower units, and its rationality directly determines the power target achievement accuracy, regulation response speed, and operational stability during the regulation process. In existing technologies, the determination of the guide vane opening pulse width often relies on a preset fixed proportional coefficient, combined with simple calculations of the power regulation amount. This easily leads to problems such as excessive power target deviation, excessively long regulation stabilization time, excessive power overshoot, or excessive power fluctuation amplitude during the regulation process. These issues affect the safe and stable operation of the power grid and the efficient and low-consumption operation of the hydropower units. Therefore, improving the accuracy of active power regulation in hydropower units is an urgent problem to be solved. Summary of the Invention

[0003] This application provides a method and related device for determining the guide vane opening pulse width of a hydropower unit, which improves the accuracy of active power regulation of the hydropower unit.

[0004] In a first aspect, embodiments of this application provide a method for determining the guide vane opening pulse width of a hydroelectric generator, including: Obtain the initial operating conditions corresponding to the target hydropower unit; the initial operating conditions include head, guide vane opening, and initial power. Obtain a target active power adjustment command for the target hydropower unit under the initial operating conditions; the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit; The pulse widths of the n guide vane openings corresponding to the target hydropower unit are determined based on the initial operating conditions and the target active power adjustment command; n is a positive integer. Determine n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths; each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude; Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values; The maximum value among the n pulse modulation effect severity values ​​is determined to obtain the target pulse modulation effect severity value; Determine the guide vane opening pulse width corresponding to the target pulse adjustment effect value to obtain the target guide vane opening pulse width; The active power is adjusted according to the target guide vane opening pulse width.

[0005] Secondly, embodiments of this application provide a device for determining the guide vane opening pulse width of a hydroelectric generator, the device comprising: an acquisition unit and a processing unit; The acquisition unit is used to acquire the initial operating conditions corresponding to the target hydropower unit; the initial operating conditions include head, guide vane opening, and initial power. The processing unit is configured to acquire a target active power adjustment command for the target hydropower unit under the initial operating conditions; the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit. The pulse widths of the n guide vane openings corresponding to the target hydropower unit are determined based on the initial operating conditions and the target active power adjustment command; n is a positive integer. Determine n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths; each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude; Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values; The maximum value among the n pulse modulation effect severity values ​​is determined to obtain the target pulse modulation effect severity value; Determine the guide vane opening pulse width corresponding to the target pulse adjustment effect value to obtain the target guide vane opening pulse width; The active power is adjusted according to the target guide vane opening pulse width.

[0006] Thirdly, embodiments of the present invention provide an electronic device, including: a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor to cause the electronic device to perform the method as described in the first aspect.

[0007] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that is executed by a processor to implement the method as described in the first aspect.

[0008] Fifthly, embodiments of the present invention provide a computer program product including a non-transitory computer-readable storage medium storing a computer program, such that a computer performs the method as described in the first aspect.

[0009] Implementing the embodiments of the present invention has the following beneficial effects: As can be seen, the method for determining the guide vane opening pulse width of a hydropower unit described in this embodiment of the invention first obtains the initial operating conditions corresponding to the target hydropower unit; the initial operating conditions include head, guide vane opening, and initial power, and also obtains the target active power adjustment command for the target hydropower unit under the initial operating conditions, wherein the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit. Then, based on the initial operating conditions and the target active power adjustment command, n guide vane opening pulse widths corresponding to the target hydropower unit are determined. Next, n sets of adjustment numbers corresponding to the target hydropower unit under the adjustment action of the n guide vane opening pulse widths are determined. According to the method described in this application, each guide vane opening pulse width corresponds to a set of adjustment data. Each set of adjustment data includes a power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude. Then, based on the n sets of adjustment data, the pulse adjustment effect degree value corresponding to each of the n guide vane opening pulse widths is determined, resulting in n pulse adjustment effect degree values. Next, the maximum value among the n pulse adjustment effect degree values ​​is determined to obtain the target pulse adjustment effect degree value. Finally, the guide vane opening pulse width corresponding to the target pulse adjustment effect degree value is determined, resulting in the target guide vane opening pulse width. This target guide vane opening pulse width is used for active power regulation. The implementation method of this application improves the accuracy of active power regulation in hydropower units. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0011] Figure 1 This is a flowchart of a method for determining the guide vane opening pulse width of a hydroelectric generator provided in an embodiment of this application; Figure 2 This is a flowchart of determining the pulse width of n guide vanes according to an embodiment of this application; Figure 3 This is another flowchart for determining the pulse width of n guide vanes according to an embodiment of this application; Figure 4 This is a flowchart of determining the degree of control effect of n pulses according to an embodiment of this application; Figure 5 This is a flowchart illustrating the determination of the pulse control effect level value corresponding to the pulse width of the first guide vane opening, as provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of a closed-loop control system for automatic power generation control provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a guide vane opening pulse width determination device for a hydroelectric generator provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0012] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0013] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0014] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0015] Please see Figure 1 , Figure 1 This is a flowchart of a method for determining the guide vane opening pulse width of a hydroelectric generator provided in an embodiment of this application, including but not limited to the following steps: S101: Obtain the initial operating conditions corresponding to the target hydropower unit.

[0016] In this embodiment, the initial operating conditions include head, guide vane opening, and initial power. Head is the water level difference between the upstream and downstream of the target hydropower unit, guide vane opening is the degree of opening of the guide vanes corresponding to the current target hydropower unit, and initial power is the actual output power of the target hydropower unit before regulation.

[0017] S102: Obtain the target active power adjustment command for the target hydropower unit under the initial operating conditions.

[0018] In this embodiment, the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit. After clarifying the initial operating conditions of the target hydropower unit before adjustment, an active power adjustment command for the current initial operating conditions of the unit is obtained from the power system dispatch center or the unit control system. This command will clearly inform the unit of the specific value that needs to be adjusted from the current initial power to the target power, which is the power adjustment amount corresponding to the unit.

[0019] S103: Determine the pulse width of the n guide vane openings corresponding to the target hydropower unit based on the initial operating conditions and the target active power adjustment command.

[0020] In this implementation, n is a positive integer.

[0021] First, extract the head, guide vane opening, initial power, and power adjustment amount from the target active power adjustment command in the initial operating conditions. Input these parameters into a preset neural network model to obtain the target correction coefficient. Use the target correction coefficient to adjust the preset fixed proportional coefficient of the hydropower unit to obtain the target proportional coefficient. Then, determine the reference guide vane opening pulse width based on the target proportional coefficient. At the same time, obtain the minimum guide vane opening pulse width and the maximum guide vane opening pulse width corresponding to the unit. Next, generate a positive offset pulse width greater than the reference guide vane opening pulse width and a negative offset pulse width less than the reference guide vane opening pulse width according to the preset pulse width step size. Finally, integrate the a positive offset pulse widths and a negative offset pulse widths with the reference guide vane opening pulse width to form n guide vane opening pulse widths that are all between the minimum guide vane opening pulse width and the maximum guide vane opening pulse width.

[0022] By combining key parameters of the initial operating conditions with the power regulation, the fixed proportional coefficient is precisely adjusted through the target correction coefficient generated by the preset neural network model. This makes the target proportional coefficient more suitable for the current operating state of the unit. The reference guide vane opening pulse width determined in this way has stronger pertinence and rationality. Then, positive and negative offset pulse widths are generated and integrated around the reference pulse width according to the preset step size. This ensures that all n guide vane opening pulse widths are within the minimum and maximum pulse width range allowed by the unit, avoiding exceeding the safe operating boundary. It also provides multiple differentiated alternative pulse widths, laying the foundation for subsequent selection of the optimal pulse width that takes into account the power target accuracy, regulation stability, overshoot control and fluctuation amplitude. At the same time, the use of the neural network model can adapt to different operating conditions, improve the flexibility and adaptability of pulse width determination, reduce the problem of poor regulation effect that may exist with a single pulse width, and ultimately help the hydropower unit achieve more efficient, accurate and stable active power regulation.

[0023] S104: Determine the n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths.

[0024] In this embodiment, each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude.

[0025] The previously determined n guide vane opening pulse widths were applied to the active power regulation process of the target hydropower unit. For the individual regulation effect of each guide vane opening pulse width, key operating data of the unit during the regulation process were monitored and recorded throughout. This resulted in n sets of regulation data corresponding one-to-one with the n guide vane opening pulse widths. Each set of data included four core evaluation indicators: power target deviation, regulation stabilization time, power overshoot, and power fluctuation amplitude. Specifically, the power target deviation is the difference between the actual output power of the target hydropower unit and the target active power after regulation; the regulation stabilization time is the time required for the target hydropower unit to stabilize its power within the target range from the start of regulation; the power overshoot is the maximum value by which the actual power exceeds the target active power during regulation; and the power fluctuation amplitude is the maximum range of actual power variation during fluctuation before regulation stabilizes.

[0026] By applying each of the n guide vane opening pulse widths individually to the active power regulation of the unit, and monitoring and recording the four core indicators corresponding to each group of regulation—power target deviation, regulation stabilization time, power overshoot, and power fluctuation amplitude—a one-to-one correspondence of n sets of regulation data is formed. This achieves multi-dimensional and concrete quantification of the regulation performance of each candidate pulse width, avoiding the one-sidedness caused by a single indicator or general evaluation. It also provides comprehensive, real, and comparable data support for the subsequent calculation of the pulse regulation effect and the selection of the optimal pulse width, ensuring that the finally selected target guide vane opening pulse width can take into account regulation accuracy, stability, and speed, effectively adapting to different head conditions, thereby improving the performance of hydropower units in automatic power generation control and regulation.

[0027] S105: Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values.

[0028] In this embodiment, for each of the n guide vane opening pulse widths, the power target deviation value, regulation stabilization time, power overshoot, and power fluctuation amplitude are first extracted from the corresponding set of regulation data. Then, these four indicators are converted into their respective pulse regulation effect degree values ​​according to preset conversion rules. Finally, these four individual effect degree values ​​are comprehensively calculated through preset fusion rules to obtain the pulse regulation effect degree value corresponding to each guide vane opening pulse width, thereby obtaining n pulse regulation effect degree values.

[0029] It can be seen that, for each guide vane opening pulse width, the four core regulation indicators corresponding to it—power target deviation, regulation stabilization time, power overshoot, and power fluctuation amplitude—are first converted into quantifiable individual effect values ​​according to preset rules. Then, the pulse regulation effect value corresponding to each pulse width is calculated comprehensively through preset fusion rules. This not only achieves multi-dimensional and precise quantification of the regulation performance of each pulse width, making the originally scattered indicator data form a unified evaluation standard, but also makes the regulation effects of n guide vane opening pulse widths intuitively comparable. This provides an objective and unified decision-making basis for the subsequent selection of the optimal pulse width, ensuring that the finally selected pulse width can fully meet the requirements of regulation accuracy and stability, thereby improving the reliability and adaptability of the unit's automatic power generation control regulation.

[0030] S106: Determine the maximum value among the n pulse adjustment effect values ​​to obtain the target pulse adjustment effect value.

[0031] In this embodiment, among the n pulse adjustment effect values ​​corresponding to the n guide vane opening pulse widths, the pulse adjustment effect value with the largest value is selected. This pulse adjustment effect value with the largest value is the target pulse adjustment effect value, which represents that the corresponding guide vane opening pulse width has the best adjustment effect among all the candidate pulse widths.

[0032] S107: Determine the guide vane opening pulse width corresponding to the target pulse adjustment effect value, and obtain the target guide vane opening pulse width.

[0033] In this embodiment, the target guide vane opening pulse width is used for active power regulation.

[0034] After selecting the target pulse regulation effect value, the guide vane opening pulse width corresponding to the target pulse regulation effect value is found and determined as the target guide vane opening pulse width. This target guide vane opening pulse width is the guide vane opening pulse width with the best regulation effect selected from n candidate guide vane opening pulse widths. It will then be directly used in the active power regulation process of the target hydropower unit to achieve precise and stable power adjustment.

[0035] It can be seen that by determining multiple alternative guide vane opening pulse widths based on the initial operating conditions and target active power regulation commands, and then comprehensively evaluating the regulation effect of each pulse width through multiple sets of regulation data including power target deviation values, regulation stabilization time, power overshoot, and power fluctuation amplitude, the optimal value corresponding to the target guide vane opening pulse width is selected after quantification to obtain the pulse regulation effect value. This ensures the pertinence and scientific nature of pulse width selection, avoids regulation deviations caused by a single parameter or a single pulse width, and takes into account the accuracy, stability, and speed of power regulation, reduces unit losses caused by overshoot and fluctuations, and improves the overall efficiency and reliability of active power regulation of hydropower units. At the same time, the comparison and screening mechanism of multiple alternative schemes can adapt to different operating conditions, making the finally determined target guide vane opening pulse width more in line with the actual operating needs of the unit.

[0036] Please see Figure 2 , Figure 2 This application provides a flowchart for determining the pulse width of n guide vane openings, including but not limited to the following steps: S201: Determine the head, guide vane opening, initial power, and power adjustment amount corresponding to the target active power adjustment command for the initial operating condition.

[0037] In this embodiment, the head, guide vane opening, and initial power of the target hydropower unit when it is in its initial operating condition are first determined. At the same time, the power adjustment amount that the unit needs to adjust from the initial power to the target power is extracted from the target active power adjustment command issued for the target hydropower unit under its current initial operating condition.

[0038] S202: Input the water head, the guide vane opening, the initial power, and the power adjustment amount into a preset neural network model to obtain the target correction coefficient.

[0039] In this embodiment, the target correction coefficient is used to adjust the fixed proportional coefficient of the target hydropower unit. The fixed proportional coefficient is a general conversion reference parameter that is preset in the target hydropower unit and used to convert the power regulation demand into the guide vane opening pulse width.

[0040] It can be seen that by using a pre-set neural network model, key parameters reflecting the real-time operating conditions of the unit, such as head, guide vane opening, initial power, and power regulation, are fully integrated to accurately output the target correction coefficient. This coefficient is then used to dynamically adjust the pre-set general fixed proportional coefficient of the unit, avoiding the problem of insufficient adaptability of the fixed proportional coefficient under different operating conditions. This makes the conversion benchmark of power regulation demand to guide vane opening pulse width more in line with the current actual operating state, thereby improving the accuracy of guide vane opening pulse width determination. This provides reliable support for the unit to respond quickly and stably to active power regulation commands, ensuring the overall regulation performance of automatic power generation control.

[0041] S203: Adjust the fixed proportional coefficient based on the target correction coefficient to obtain the target proportional coefficient.

[0042] In this embodiment, the preset neural network model can be a backpropagation neural network, a radial basis function neural network, or other models suitable for parameter mapping and regression prediction.

[0043] The pre-defined neural network model can be obtained as follows: First, collect historical operating data of the target hydropower unit under different combinations of head, guide vane opening, initial power, and power adjustment, covering the optimal correction coefficient, fixed proportional coefficient, guide vane opening pulse width, and adjustment effect data verified in actual operation. After preprocessing the data such as denoising, completion, and normalization, set the head, guide vane opening, initial power, and power adjustment as the model input features, and set the optimal correction coefficient as the output label. Divide the dataset into training set, validation set, and test set. Select a suitable network structure such as backpropagation neural network and set hyperparameters such as the number of hidden layers and neurons. Iteratively train the model using the training set. Monitor the model performance and adjust the hyperparameters, network weights, and thresholds using the validation set. Verify the prediction accuracy and generalization ability of the model using the test set until the model meets the preset error requirements and stability standards. Finally, a pre-defined neural network model that can be directly used to calculate the target correction coefficient in real time is formed.

[0044] S204: Determine the pulse width of the n guide vanes corresponding to the target hydropower unit based on the target proportional coefficient.

[0045] In this embodiment, the reference guide vane opening pulse width is first calculated based on the target proportional coefficient and related parameters such as power regulation. Then, the minimum and maximum guide vane opening pulse widths allowed for the operation of the target hydropower unit are obtained. Next, according to the preset pulse width step size, a positive offset guide vane opening pulse widths greater than the reference guide vane opening pulse width and a negative offset guide vane opening pulse widths less than the reference guide vane opening pulse width are generated. Finally, these a positive offset pulse widths and a negative offset pulse widths are integrated with the reference guide vane opening pulse width to form n guide vane opening pulse widths, and all n pulse widths are within the range of the previously obtained minimum and maximum guide vane opening pulse widths.

[0046] It should be explained that the maximum value of the 'a' positive offset pulse widths does not exceed the maximum guide vane opening pulse width, and the minimum value of the 'a' negative offset pulse widths is not lower than the minimum guide vane opening pulse width. The total coverage of the 'a' positive offset pulse widths, 'a' negative offset pulse widths, and the reference guide vane opening pulse width is much smaller than the range included by the minimum and maximum guide vane opening pulse widths. This avoids the pulse widths exceeding the safe operating boundary of the unit and allows for focusing on a reasonable range around the reference pulse width to determine the alternative guide vane opening pulse widths, ensuring the relevance and practicality of the alternative pulse widths without excessively covering the entire allowable range and increasing the cost of ineffective calculations or screening.

[0047] It can be seen that by first accurately extracting the key parameters and power regulation of the initial operating conditions, and then using the learning and mapping capabilities of the preset neural network model to generate a target correction coefficient that is suitable for the current scenario, the fixed proportional coefficient of the unit is adjusted in a targeted manner. This makes the target proportional coefficient more in line with the actual operating conditions and regulation requirements, avoiding the problem that the fixed proportional coefficient is highly universal but lacks adaptability. Then, based on the target proportional coefficient, n guide vane opening pulse widths are determined. This not only ensures the scientificity and rationality of the candidate pulse widths, but also provides a diverse and high-quality basis for the subsequent selection of the optimal pulse width. It reduces the regulation deviation that may exist in a single pulse width, improves the accuracy and adaptability of the active power regulation of the hydropower unit, and the application of the neural network model can effectively cope with different operating conditions, making the pulse width determination process more flexible and intelligent, which is conducive to the unit to achieve stable and efficient power regulation.

[0048] Please see Figure 3 , Figure 3 This is another flowchart for determining the pulse width of n guide vanes according to an embodiment of this application, including but not limited to the following steps: S301: Obtain the minimum guide vane opening pulse width and the maximum guide vane opening pulse width corresponding to the target hydroelectric generator unit.

[0049] In this embodiment, the minimum guide vane opening pulse width is the minimum allowable time width when adjusting the guide vane opening of the target hydropower unit, and the maximum guide vane opening pulse width is the maximum allowable time width. The minimum and maximum guide vane opening pulse widths can clearly define the safe range of the guide vane opening pulse width. The n guide vane opening pulse widths determined subsequently are all within this range, which not only ensures that the unit's guide vane opening adjustment does not exceed the safe operating boundary and avoids equipment damage or abnormal operation, but also provides an effective constraint for selecting the optimal guide vane opening pulse width, ensuring the practicality and safety of the candidate pulse widths.

[0050] S302: Determine the reference guide vane opening pulse width based on the target proportional coefficient, the minimum guide vane opening pulse width, and the maximum guide vane opening pulse width.

[0051] In this embodiment, the minimum and maximum guide vane opening pulse widths allowed for the operation of the target hydropower unit are first obtained. Then, using the target proportional coefficient and parameters such as the unit's active power regulation and rated capacity, calculations are performed within the range of the minimum and maximum guide vane opening pulse widths to obtain a reference guide vane opening pulse width that meets the unit's regulation requirements and is within the safe operating boundary. Specifically, the minimum and maximum guide vane opening pulse widths allowed for the operation of the target hydropower unit are first determined. Then, combined with the target proportional coefficient and based on the unit's current active power regulation requirements and parameters such as the unit's rated capacity, calculations are performed within the range of the minimum and maximum guide vane opening pulse widths, taking into account factors such as the unit's power regulation accuracy and regulation stability, to obtain a reference guide vane opening pulse width that meets the unit's active power regulation requirements and is within the unit's safe operating boundary.

[0052] S303: Determine the n guide vane opening pulse widths based on the preset pulse width step size and the reference guide vane opening pulse width.

[0053] In this embodiment, the pulse widths of the n guide vanes are all located between the minimum guide vane opening pulse width and the maximum guide vane opening pulse width.

[0054] For example, based on the preset pulse width step size, a positive offset guide vane opening pulse widths that are greater than the reference guide vane opening pulse width are determined. Specifically, a is an integer less than n. Taking the reference guide vane opening pulse width as a reference, the calculation is performed by incrementing the preset pulse width step size each time, and a guide vane opening pulse widths whose values ​​are all greater than the reference guide vane opening pulse width are obtained in sequence. These a pulse widths are the positive offset guide vane opening pulse widths.

[0055] For example, based on the preset pulse width step size, a negative offset guide vane opening pulse widths that are smaller than the reference guide vane opening pulse width are determined. Specifically, with the reference guide vane opening pulse width as a reference, the calculation is performed by decreasing the preset pulse width step size each time, and a guide vane opening pulse widths whose values ​​are all smaller than the reference guide vane opening pulse width are obtained in sequence. These a pulse widths are the negative offset guide vane opening pulse widths, which are consistent with the number of positive offset pulse widths, forming a symmetrical offset range.

[0056] For example, the n guide vane opening pulse widths are determined based on the a positive offset guide vane opening pulse widths, the a negative offset guide vane opening pulse widths, and the reference guide vane opening pulse width. Specifically, the previously determined a positive offset guide vane opening pulse widths and a negative offset guide vane opening pulse widths are integrated with the reference guide vane opening pulse width as a benchmark. The total number of the three is n guide vane opening pulse widths, ultimately forming multiple sets of alternative guide vane opening pulse widths that cover the reference pulse width and reasonable offset ranges on both sides.

[0057] Around the reference guide vane opening pulse width, a positive offset guide vane opening pulse widths and a negative offset guide vane opening pulse widths are symmetrically generated according to a preset pulse width step size. Then, the two types of offset guide vane opening pulse widths are integrated with the reference guide vane opening pulse width to form n candidate guide vane opening pulse widths. This ensures that the candidate guide vane opening pulse widths are centered on the reference pulse width and cover a reasonable offset range on both sides, taking into account the targetedness and comprehensiveness of guide vane opening pulse width selection. At the same time, the fixed step size and symmetrical design make the distribution of candidate guide vane opening pulse widths regular and controllable, avoiding redundancy of invalid guide vane opening pulse widths. In addition, the n candidate guide vane opening pulse widths provide sufficient and accurate selection space for subsequent selection of the optimal guide vane opening pulse width by combining adjustment data, helping to adapt to the power adjustment requirements under different operating conditions and improving the scientificity and reliability of guide vane opening pulse width selection.

[0058] As can be seen, the safety boundary is first determined by obtaining the minimum and maximum allowable guide vane opening pulse widths of the target hydropower unit. Then, the reference guide vane opening pulse width that fits the current operating conditions is determined by combining the target proportional coefficient. Subsequently, symmetrical positive and negative offset pulse widths are generated around the reference pulse width at preset step sizes and integrated into n candidate pulse widths. This ensures that all candidate pulse widths are within the safe operating range, avoiding equipment damage or abnormal regulation, while also providing diversified alternatives within a reasonable range around the reference pulse width. This balances the relevance and comprehensiveness of pulse width selection, reduces ineffective screening costs, and lays the foundation for accurately selecting the optimal pulse width that balances regulation accuracy, stability, and efficiency, thereby improving the reliability and adaptability of the hydropower unit's active power regulation.

[0059] Please see Figure 4 , Figure 4 This application provides a flowchart for determining the degree of control effect of n pulses, including but not limited to the following steps: S401: Determine the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude corresponding to the pulse width of the first guide vane opening, and obtain the first power target deviation value, the first adjustment stabilization time, the first power overshoot, and the first power fluctuation amplitude.

[0060] In this embodiment, the first guide vane opening pulse width is any one of the n guide vane opening pulse widths.

[0061] It should be explained that, since the first guide vane opening pulse width is any one of the n guide vane opening pulse widths, the pulse control effect degree value corresponding to each of the n guide vane opening pulse widths can be determined according to the method for determining the pulse control effect degree value corresponding to the first guide vane opening pulse width, thereby obtaining n pulse control effect degree values.

[0062] In this embodiment, any one of the n guide vane opening pulse widths is selected as the first guide vane opening pulse width and applied to the active power regulation process of the target hydropower unit. The difference between the actual output power of the unit and the target active power after regulation is completed, the time required for the unit to stabilize at the target range from the start of regulation, the maximum value by which the actual power exceeds the target active power during regulation, and the maximum range of actual power fluctuation before regulation is stable are monitored and recorded throughout the process. These recorded values ​​correspond to the first power target deviation value, the first regulation stabilization time, the first power overshoot, and the first power fluctuation amplitude, respectively.

[0063] S402: Determine the first pulse adjustment effect value corresponding to the first power compliance deviation value, the second pulse adjustment effect value corresponding to the first adjustment stabilization duration, the third pulse adjustment effect value corresponding to the first power overshoot, and the fourth pulse adjustment effect value corresponding to the first power fluctuation amplitude.

[0064] In this embodiment, quantification rules are first set for each indicator. For the first power target deviation value, the smaller the deviation, the higher the effect value. According to the set quantification rules, it is converted into the first pulse regulation effect value. For the first regulation stabilization duration, the shorter the duration, the higher the effect value. According to the set quantification rules, the second pulse regulation effect value is obtained. For the first power overshoot, the smaller the overshoot, the higher the effect value. According to the set quantification rules, the third pulse regulation effect value can be obtained. For the first power fluctuation amplitude, the smaller the fluctuation amplitude, the higher the effect value. According to the set quantification rules, the fourth pulse regulation effect value can be determined.

[0065] It can be a first mapping relationship between a preset power target deviation value and a pulse adjustment effect value, based on which a first pulse adjustment effect value corresponding to the first power target deviation value can be determined; it can be a second mapping relationship between a preset adjustment stabilization duration and a pulse adjustment effect value, based on which a second pulse adjustment effect value corresponding to the first adjustment stabilization duration can be determined; it can be a third mapping relationship between a preset power overshoot and a pulse adjustment effect value, based on which a third pulse adjustment effect value corresponding to the first power overshoot can be determined; it can be a fourth mapping relationship between a preset power fluctuation amplitude and a pulse adjustment effect value, based on which a fourth pulse adjustment effect value corresponding to the first power fluctuation amplitude can be determined.

[0066] S403: Determine the pulse control effect value corresponding to the first guide vane opening pulse width based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value.

[0067] In this embodiment, the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value can be assigned corresponding weights, and then each adjustment effect value can be multiplied by its corresponding weight and summed to obtain a value that comprehensively reflects the adjustment performance of the first guide vane opening pulse width. This value is the pulse control effect value corresponding to the first guide vane opening pulse width. Alternatively, the four effect values ​​can be integrated by taking the average value to determine the final pulse control effect value.

[0068] It can be seen that for each of the n guide vane opening pulse widths, by extracting four core indicators—power target deviation, regulation stabilization time, power overshoot, and power fluctuation amplitude—and quantifying them into corresponding pulse regulation effect values, and then comprehensively integrating them, the pulse control effect value corresponding to each guide vane opening pulse width is obtained. This achieves a multi-dimensional and comprehensive evaluation of the regulation performance of each candidate pulse width, avoiding the one-sidedness of single-indicator evaluation. It also makes the regulation effects of different pulse widths comparable through quantification, providing an objective and accurate basis for subsequent selection of the optimal guide vane opening pulse width. This ensures that the finally selected guide vane opening pulse width can take into account regulation accuracy, stability, and speed, thereby improving the overall quality of active power regulation of hydropower units.

[0069] Please see Figure 5 , Figure 5 This application provides a flowchart of determining the pulse control effect level value corresponding to the pulse width of the first guide vane opening, including but not limited to the following steps: S501: Determine a reference pulse control effect value based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value.

[0070] In this embodiment, a first weight corresponding to the first pulse adjustment effect degree value, a second weight corresponding to the second pulse adjustment effect degree value, a third weight corresponding to the third pulse adjustment effect degree value, and a fourth weight corresponding to the fourth pulse adjustment effect degree value can be determined first, and the sum of the first weight, the second weight, the third weight, and the fourth weight is 1.

[0071] Then, based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, the fourth pulse adjustment effect value, the first weight corresponding to the first pulse adjustment effect value, the second weight corresponding to the second pulse adjustment effect value, the third weight corresponding to the third pulse adjustment effect value, and the fourth weight corresponding to the fourth pulse adjustment effect value, a reference pulse control effect value is obtained. Specifically, the reference pulse control effect value is calculated according to the following formula: Reference pulse control effect level value = first pulse adjustment effect level value × first weight + second pulse adjustment effect level value × second weight + third pulse adjustment effect level value × third weight + fourth pulse adjustment effect level value × fourth weight; According to the above formula, a reference pulse control effect value can be obtained by calculating based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, the fourth pulse adjustment effect value, the first weight corresponding to the first pulse adjustment effect value, the second weight corresponding to the second pulse adjustment effect value, the third weight corresponding to the third pulse adjustment effect value, and the fourth weight corresponding to the fourth pulse adjustment effect value.

[0072] S502: Obtain the proportional intensity coefficient corresponding to the pulse width of the first guide vane opening.

[0073] In this embodiment, the proportional intensity coefficient is the ratio between the guide vane opening amplitude of the first guide vane opening pulse width in the first control cycle and the stable guide vane opening amplitude corresponding to the first guide vane opening pulse width.

[0074] The proportional strength coefficient is the ratio of the guide vane opening amplitude of the first guide vane opening pulse width in the first control cycle to the stable guide vane opening amplitude corresponding to that pulse width. It can intuitively reflect the degree of matching between the guide vane opening in the first control cycle and the guide vane opening in the stable state. The closer the ratio is to 1, the closer the guide vane opening in the first control cycle is to the stable state, and the better the adaptability in the initial stage of adjustment.

[0075] When the proportional strength coefficient is close to 1, it can reduce the power overshoot and fluctuation amplitude during the adjustment process, shorten the adjustment stabilization time, and make the power target deviation easier to control, thereby improving the pulse adjustment effect value in each dimension and ultimately making the overall pulse control effect value better. If the proportional strength coefficient deviates too much from 1 (too small and the initial opening is insufficient, too large and the initial opening is excessive), it will lead to overshoot, increased fluctuation or prolonged stabilization time during the adjustment process, lowering the effect value in each dimension and thus reducing the pulse control effect value. Therefore, it is necessary to consider the influence of the proportional strength coefficient corresponding to the pulse width of the first guide vane opening on the pulse control effect value corresponding to the pulse width of the first guide vane opening.

[0076] S503: Determine the adjustment parameter corresponding to the proportional strength coefficient.

[0077] In this embodiment, it can be a preset mapping relationship between a proportional intensity coefficient and an adjustment parameter. Based on this mapping relationship, the adjustment parameter corresponding to the proportional intensity coefficient can be determined.

[0078] S504: Adjust the reference pulse control effect value based on the adjustment parameters to obtain the pulse control effect value corresponding to the pulse width of the first guide vane opening.

[0079] In this embodiment, the pulse control effect value corresponding to the pulse width of the first guide vane opening is calculated according to the following formula: The pulse control effect value corresponding to the pulse width of the first guide vane opening = Reference pulse control effect value × (1 + adjustment parameter); Based on the above formula, the reference pulse control effect value can be adjusted according to the adjustment parameters to obtain the pulse control effect value corresponding to the pulse width of the first guide vane opening.

[0080] It can be seen that by first determining the reference pulse control effect value reflecting the basic regulation performance through four core regulation indicators, and then introducing the proportional strength coefficient that reflects the matching degree between the guide vane opening and the steady state in the first control cycle, the reference value is specifically corrected in combination with the corresponding adjustment parameters. This not only takes into account the performance of core regulation dimensions such as power target accuracy and regulation speed, but also makes up for the shortcomings of ignoring the initial regulation adaptability when relying solely on basic indicators for evaluation. This allows the pulse control effect value corresponding to the pulse width of the first guide vane opening to more comprehensively and accurately reflect the actual regulation performance of the pulse width, further improving the stability and adaptability of the active power regulation of the hydropower unit.

[0081] It should be noted that, in this embodiment, the method for determining the guide vane opening pulse width of the hydropower unit can be applied to the automatic power generation control closed-loop control system. Please refer to [link to relevant documentation]. Figure 6 , Figure 6This is a schematic diagram of the structure of a closed-loop control system for automatic generation control provided in this application. Figure 6 In the process, the automatic power generation control closed-loop control system 600 includes a dispatch center instruction issuance module 601, a hydropower station unit monitoring module 602, a unit speed regulation module 603, a data acquisition and feedback module 604, and a pulse width effect evaluation and screening module 605.

[0082] As the command source of the dispatch center's automatic generation control closed-loop control system, the core function of the dispatch center command issuing module 601 is to accurately calculate the total power generation target value of the hydropower station based on the global requirements such as real-time load changes and power quality requirements of the power grid. Then, according to the operating status and capacity ratio of each unit, the total target is scientifically decomposed into the target active power adjustment command corresponding to each hydropower unit. Subsequently, the command is stably issued to the hydropower station unit monitoring module 602, providing a clear power guidance for subsequent unit regulation.

[0083] The hydropower station unit monitoring module 602, as the core dispatching center of the entire closed-loop control system, is responsible for real-time acquisition of the initial operating condition data of the target hydropower unit (including head, guide vane opening, and initial power), and receiving the target active power adjustment command from the dispatching center command issuing module 601, extracting the power adjustment amount. On the other hand, based on the initial operating condition and power adjustment amount, it generates n guide vane opening pulse widths through a preset guide vane opening pulse width determination method, and combines real-time head dynamic correction of control parameters to avoid overshoot or undershoot under different operating conditions. Then, it transmits the pulse width command to the unit speed control module 603, connecting the command parsing and execution links.

[0084] As the execution terminal of closed-loop control, the unit speed control module 603 has the core function of receiving the guide vane opening pulse width command issued by the hydropower station unit monitoring module 602. Through internal hydraulic actuators, control modules and other components, it converts the pulse width signal into specific guide vane actions, accurately adjusts the guide vane opening to control the water flow rate entering the turbine, thereby driving the turbine runner speed to change, and finally realizing the regulation of the unit's output power.

[0085] The data acquisition and feedback module 604 serves as the data support link for closed-loop control. Through various sensors deployed on the unit (such as power sensors, opening sensors, etc.), it collects key regulation data in real time, such as the actual opening of the guide vanes, the actual output power of the unit, the power target deviation, the regulation stabilization time, the power overshoot, and the power fluctuation amplitude. It then quickly and accurately transmits this real-time data back to the hydropower station unit monitoring module 602 and the pulse width effect evaluation and screening module 605, providing data support for the evaluation of the pulse width regulation effect.

[0086] The pulse width effect evaluation and screening module 605, as the core of closed-loop control optimization, has the core function of receiving n sets of regulation data transmitted by the data acquisition and feedback module 604, quantitatively analyzing the regulation effect corresponding to each guide vane opening pulse width, determining the degree value of each pulse regulation effect, and then screening out the target guide vane opening pulse width corresponding to the maximum value from the n pulse regulation effect degree values. The result is fed back to the hydropower station unit monitoring module 602 to provide the optimal pulse width scheme for subsequent precise unit regulation and continuously improve the regulation performance of the automatic generation control closed-loop control system.

[0087] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a guide vane opening pulse width determination device for a hydroelectric generator provided in an embodiment of this application. The guide vane opening pulse width determination device 700 for a hydroelectric generator includes: an acquisition unit 701 and a processing unit 702. The acquisition unit 701 is used to acquire the initial operating conditions corresponding to the target hydropower unit; the initial operating conditions include head, guide vane opening, and initial power. Obtain a target active power adjustment command for the target hydropower unit under the initial operating conditions; the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit; The processing unit 702 is used to determine the n guide vane opening pulse widths corresponding to the target hydropower unit based on the initial operating conditions and the target active power adjustment command; n is a positive integer; Determine n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths; each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude; Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values; The maximum value among the n pulse modulation effect severity values ​​is determined to obtain the target pulse modulation effect severity value; The guide vane opening pulse width corresponding to the target pulse regulation effect value is determined to obtain the target guide vane opening pulse width; the target guide vane opening pulse width is used for active power regulation.

[0088] In some possible implementations, in determining the pulse widths of the n guide vane openings corresponding to the target hydropower unit based on the initial operating conditions and the target active power adjustment command, the processing unit 702 is specifically used for: Determine the head, guide vane opening, initial power, and power adjustment amount corresponding to the target active power adjustment command for the initial operating condition; The head, guide vane opening, initial power, and power adjustment amount are input into a preset neural network model to obtain a target correction coefficient. The target correction coefficient is used to adjust the fixed proportional coefficient of the target hydropower unit. The fixed proportional coefficient is a general conversion reference parameter that is preset in the target hydropower unit and used to convert the power adjustment requirement into the guide vane opening pulse width. The target proportional coefficient is obtained by adjusting the fixed proportional coefficient based on the target correction coefficient. The pulse width of the n guide vanes corresponding to the target hydropower unit is determined based on the target proportional coefficient.

[0089] In some possible implementations, in determining the pulse width of the n guide vane openings corresponding to the target hydropower unit based on the target proportional coefficient, the processing unit 702 is specifically used for: Obtain the minimum guide vane opening pulse width and the maximum guide vane opening pulse width corresponding to the target hydroelectric generator unit; The reference guide vane opening pulse width is determined based on the target proportional coefficient, the minimum guide vane opening pulse width, and the maximum guide vane opening pulse width; The n guide vane opening pulse widths are determined based on the preset pulse width step size and the reference guide vane opening pulse width; all n guide vane opening pulse widths are located between the minimum guide vane opening pulse width and the maximum guide vane opening pulse width.

[0090] In some possible implementations, in determining the n guide vane opening pulse widths based on a preset pulse width step size and the reference guide vane opening pulse width, the processing unit 702 is specifically used for: Based on the preset pulse width step size, determine a positive offset guide vane opening pulse widths that are greater than the reference guide vane opening pulse width; a is an integer less than n; Based on the preset pulse width step size, determine a negative offset guide vane opening pulse widths that are smaller than the reference guide vane opening pulse width; The n guide vane opening pulse widths are determined based on the a positive offset guide vane opening pulse widths, the a negative offset guide vane opening pulse widths, and the reference guide vane opening pulse width.

[0091] In some possible implementations, in determining the pulse control effect degree value corresponding to each of the n guide vane opening pulse widths based on the n sets of adjustment data, and obtaining n pulse control effect degree values, the processing unit 702 is specifically used for: The power target deviation value, regulation stabilization time, power overshoot, and power fluctuation amplitude corresponding to the first guide vane opening pulse width are determined to obtain the first power target deviation value, the first regulation stabilization time, the first power overshoot, and the first power fluctuation amplitude; the first guide vane opening pulse width is any one of the n guide vane opening pulse widths; Determine the first pulse adjustment effect value corresponding to the first power target deviation value, the second pulse adjustment effect value corresponding to the first adjustment stabilization time, the third pulse adjustment effect value corresponding to the first power overshoot, and the fourth pulse adjustment effect value corresponding to the first power fluctuation amplitude. The pulse control effect value corresponding to the first guide vane opening pulse width is determined based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value.

[0092] In some possible implementations, in determining the pulse control effect degree value corresponding to the first guide vane opening pulse width based on the first pulse adjustment effect degree value, the second pulse adjustment effect degree value, the third pulse adjustment effect degree value, and the fourth pulse adjustment effect degree value, the processing unit 702 is specifically used for: A reference pulse control effect value is determined based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value. Obtain the proportional intensity coefficient corresponding to the pulse width of the first guide vane opening; the proportional intensity coefficient is the ratio between the guide vane opening amplitude of the first guide vane opening pulse width in the first control cycle and the stable guide vane opening amplitude corresponding to the first guide vane opening pulse width. Determine the adjustment parameters corresponding to the proportional strength coefficient; Based on the adjustment parameters, the reference pulse control effect value is adjusted to obtain the pulse control effect value corresponding to the pulse width of the first guide vane opening.

[0093] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 8 As shown, the electronic device 800 includes a transceiver 801, a processor 802, and a memory 803. These are connected via a bus 804. The memory 803 stores computer programs and data, and the transceiver 801 can transmit data stored in the memory 803 to the processor 802. The program includes instructions for performing the following steps: Obtain the initial operating conditions corresponding to the target hydropower unit; the initial operating conditions include head, guide vane opening, and initial power. Obtain a target active power adjustment command for the target hydropower unit under the initial operating conditions; the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit; The pulse widths of the n guide vane openings corresponding to the target hydropower unit are determined based on the initial operating conditions and the target active power adjustment command; n is a positive integer. Determine n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths; each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude; Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values; The maximum value among the n pulse modulation effect severity values ​​is determined to obtain the target pulse modulation effect severity value; The guide vane opening pulse width corresponding to the target pulse regulation effect value is determined to obtain the target guide vane opening pulse width; the target guide vane opening pulse width is used for active power regulation.

[0094] In some possible implementations, regarding the determination of the n guide vane opening pulse widths corresponding to the target hydropower unit based on the initial operating conditions and the target active power adjustment command, the above procedure includes instructions for performing the following steps: Determine the head, guide vane opening, initial power, and power adjustment amount corresponding to the target active power adjustment command for the initial operating condition; The head, guide vane opening, initial power, and power adjustment amount are input into a preset neural network model to obtain a target correction coefficient. The target correction coefficient is used to adjust the fixed proportional coefficient of the target hydropower unit. The fixed proportional coefficient is a general conversion reference parameter that is preset in the target hydropower unit and used to convert the power adjustment requirement into the guide vane opening pulse width. The target proportional coefficient is obtained by adjusting the fixed proportional coefficient based on the target correction coefficient. The pulse width of the n guide vanes corresponding to the target hydropower unit is determined based on the target proportional coefficient.

[0095] In some possible implementations, the above procedure includes instructions for performing the following steps in determining the pulse widths of the n guide vane openings corresponding to the target hydropower unit based on the target proportionality coefficient: Obtain the minimum guide vane opening pulse width and the maximum guide vane opening pulse width corresponding to the target hydroelectric generator unit; The reference guide vane opening pulse width is determined based on the target proportional coefficient, the minimum guide vane opening pulse width, and the maximum guide vane opening pulse width; The n guide vane opening pulse widths are determined based on the preset pulse width step size and the reference guide vane opening pulse width; all n guide vane opening pulse widths are located between the minimum guide vane opening pulse width and the maximum guide vane opening pulse width.

[0096] In some possible implementations, in determining the n guide vane opening pulse widths based on a preset pulse width step size and the reference guide vane opening pulse width, the above procedure includes instructions for performing the following steps: Based on the preset pulse width step size, determine a positive offset guide vane opening pulse widths that are greater than the reference guide vane opening pulse width; a is an integer less than n; Based on the preset pulse width step size, determine a negative offset guide vane opening pulse widths that are smaller than the reference guide vane opening pulse width; The n guide vane opening pulse widths are determined based on the a positive offset guide vane opening pulse widths, the a negative offset guide vane opening pulse widths, and the reference guide vane opening pulse width.

[0097] In some possible implementations, in determining the pulse control effect level value corresponding to each of the n guide vane opening pulse widths based on the n sets of adjustment data, and obtaining n pulse control effect level values, the above procedure includes instructions for performing the following steps: The power target deviation value, regulation stabilization time, power overshoot, and power fluctuation amplitude corresponding to the first guide vane opening pulse width are determined to obtain the first power target deviation value, the first regulation stabilization time, the first power overshoot, and the first power fluctuation amplitude; the first guide vane opening pulse width is any one of the n guide vane opening pulse widths; Determine the first pulse adjustment effect value corresponding to the first power target deviation value, the second pulse adjustment effect value corresponding to the first adjustment stabilization time, the third pulse adjustment effect value corresponding to the first power overshoot, and the fourth pulse adjustment effect value corresponding to the first power fluctuation amplitude. The pulse control effect value corresponding to the first guide vane opening pulse width is determined based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value.

[0098] In some possible implementations, in determining the pulse control effect value corresponding to the first guide vane opening pulse width based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value, the above procedure includes instructions for performing the following steps: A reference pulse control effect value is determined based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value. Obtain the proportional intensity coefficient corresponding to the pulse width of the first guide vane opening; the proportional intensity coefficient is the ratio between the guide vane opening amplitude of the first guide vane opening pulse width in the first control cycle and the stable guide vane opening amplitude corresponding to the first guide vane opening pulse width. Determine the adjustment parameters corresponding to the proportional strength coefficient; Based on the adjustment parameters, the reference pulse control effect value is adjusted to obtain the pulse control effect value corresponding to the pulse width of the first guide vane opening.

[0099] It should be understood that the electronic devices mentioned in this application may include smartphones (such as Android phones, iOS phones, Windows Phones, etc.), tablets, PDAs, laptops, mobile internet devices (MIDs) or wearable devices, servers, edge computing nodes, etc. The above-mentioned electronic devices are merely examples and not exhaustive, and include, but are not limited to, the electronic devices described above.

[0100] This application also provides a computer-readable storage medium storing a computer program that is executed by a processor to implement some or all of the steps of any of the methods described in the above method embodiments.

[0101] This application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods described in the above method embodiments.

[0102] It should be noted that, for the sake of simplicity, the aforementioned methods are described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are optional, and the actions and modules involved are not necessarily essential to this application.

[0103] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0104] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0105] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0106] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software program module.

[0107] If the integrated unit is implemented as a software program module and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0108] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage device, which may include: flash drive, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0109] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for determining the guide vane opening pulse width of a hydroelectric generator, characterized in that, include: Obtain the initial operating conditions corresponding to the target hydropower unit; The initial operating conditions include head, guide vane opening, and initial power; Obtain a target active power adjustment command for the target hydropower unit under the initial operating conditions; the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit; The pulse widths of the n guide vane openings corresponding to the target hydropower unit are determined based on the initial operating conditions and the target active power adjustment command; n is a positive integer. Determine n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths; each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude; Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values; The maximum value among the n pulse modulation effect values ​​is determined to obtain the target pulse modulation effect value. The guide vane opening pulse width corresponding to the target pulse regulation effect value is determined to obtain the target guide vane opening pulse width; the target guide vane opening pulse width is used for active power regulation.

2. The method as described in claim 1, characterized in that, The step of determining the pulse widths of the n guide vane openings corresponding to the target hydropower unit based on the initial operating conditions and the target active power adjustment command includes: Determine the head, guide vane opening, initial power, and power adjustment amount corresponding to the target active power adjustment command for the initial operating condition; The head, guide vane opening, initial power, and power adjustment amount are input into a preset neural network model to obtain a target correction coefficient. The target correction coefficient is used to adjust the fixed proportional coefficient of the target hydropower unit. The fixed proportional coefficient is a general conversion reference parameter that is preset in the target hydropower unit and used to convert the power adjustment requirement into the guide vane opening pulse width. The target proportional coefficient is obtained by adjusting the fixed proportional coefficient based on the target correction coefficient. The pulse width of the n guide vanes corresponding to the target hydropower unit is determined based on the target proportional coefficient.

3. The method as described in claim 2, characterized in that, The step of determining the pulse width of the n guide vane openings corresponding to the target hydropower unit based on the target proportional coefficient includes: Obtain the minimum guide vane opening pulse width and the maximum guide vane opening pulse width corresponding to the target hydroelectric generator unit; The reference guide vane opening pulse width is determined based on the target proportional coefficient, the minimum guide vane opening pulse width, and the maximum guide vane opening pulse width; The n guide vane opening pulse widths are determined based on the preset pulse width step size and the reference guide vane opening pulse width; all n guide vane opening pulse widths are located between the minimum guide vane opening pulse width and the maximum guide vane opening pulse width.

4. The method as described in claim 3, characterized in that, The determination of the n guide vane opening pulse widths based on the preset pulse width step size and the reference guide vane opening pulse width includes: Based on the preset pulse width step size, determine a positive offset guide vane opening pulse widths that are greater than the reference guide vane opening pulse width; a is an integer less than n; Based on the preset pulse width step size, determine a negative offset guide vane opening pulse widths that are smaller than the reference guide vane opening pulse width; The n guide vane opening pulse widths are determined based on the a positive offset guide vane opening pulse widths, the a negative offset guide vane opening pulse widths, and the reference guide vane opening pulse width.

5. The method as described in claim 1, characterized in that, The step of determining the pulse control effect level value corresponding to each of the n guide vane opening pulse widths based on the n sets of adjustment data yields n pulse control effect level values, including: The power target deviation value, regulation stabilization time, power overshoot, and power fluctuation amplitude corresponding to the first guide vane opening pulse width are determined to obtain the first power target deviation value, the first regulation stabilization time, the first power overshoot, and the first power fluctuation amplitude; the first guide vane opening pulse width is any one of the n guide vane opening pulse widths; Determine the first pulse adjustment effect value corresponding to the first power target deviation value, the second pulse adjustment effect value corresponding to the first adjustment stabilization time, the third pulse adjustment effect value corresponding to the first power overshoot, and the fourth pulse adjustment effect value corresponding to the first power fluctuation amplitude. The pulse control effect value corresponding to the first guide vane opening pulse width is determined based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value.

6. The method as described in claim 5, characterized in that, The step of determining the pulse control effect value corresponding to the first guide vane opening pulse width based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value includes: A reference pulse control effect value is determined based on the first pulse adjustment effect value, the second pulse adjustment effect value, the third pulse adjustment effect value, and the fourth pulse adjustment effect value. Obtain the proportional intensity coefficient corresponding to the pulse width of the first guide vane opening; the proportional intensity coefficient is the ratio between the guide vane opening amplitude of the first guide vane opening pulse width in the first control cycle and the stable guide vane opening amplitude corresponding to the first guide vane opening pulse width. Determine the adjustment parameters corresponding to the proportional strength coefficient; Based on the adjustment parameters, the reference pulse control effect value is adjusted to obtain the pulse control effect value corresponding to the pulse width of the first guide vane opening.

7. A device for determining the guide vane opening pulse width of a hydroelectric generator, characterized in that, The device includes: an acquisition unit and a processing unit; The acquisition unit is used to acquire the initial operating conditions corresponding to the target hydropower unit; the initial operating conditions include head, guide vane opening, and initial power. Obtain a target active power adjustment command for the target hydropower unit under the initial operating conditions; the target active power adjustment command includes the power adjustment amount corresponding to the target hydropower unit; The processing unit is used to determine the pulse width of n guide vane openings corresponding to the target hydropower unit based on the initial operating conditions and the target active power adjustment command; n is a positive integer; Determine n sets of adjustment data corresponding to the target hydropower unit under the adjustment of the n guide vane opening pulse widths; each guide vane opening pulse width corresponds to a set of adjustment data, and each set of adjustment data includes the power target deviation value, adjustment stabilization time, power overshoot, and power fluctuation amplitude; Based on the n sets of adjustment data, determine the pulse adjustment effect value corresponding to each of the n guide vane opening pulse widths, and obtain n pulse adjustment effect values; The maximum value among the n pulse modulation effect values ​​is determined to obtain the target pulse modulation effect value. The guide vane opening pulse width corresponding to the target pulse regulation effect value is determined to obtain the target guide vane opening pulse width; the target guide vane opening pulse width is used for active power regulation.

8. An electronic device, characterized in that, The method includes a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the one or more programs include instructions for performing the steps of the method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that is executed by a processor to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, When the computer program product is run on a computer, it causes the computer to perform the method as described in any one of claims 1-6.

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