Primary frequency modulation power regulation amplitude optimization method and system based on hydroelectric generating set

Abstract

The invention discloses a primary frequency modulation power adjustment amplitude optimization method and system based on a hydroelectric generating set, and relates to the technical field of network source coordination control optimization, and the method comprises the steps: obtaining a set operation scheduling instruction, and determining a first frequency modulation control parameter according to the set operation scheduling instruction; system operation state data are obtained, a second frequency modulation control parameter is determined according to the system operation state data, and the second frequency modulation control parameter comprises operation condition classification information and power regulation interval information; and obtaining a frequency modulation target numerical value, and executing an adjustment distribution operation according to the frequency modulation target numerical value. According to the method, the defect of the power regulation capability of a single unit in the primary frequency modulation action process is avoided, the purpose of optimizing the group operation power regulation amplitude is achieved, and the primary frequency modulation performance of the hydroelectric generating set is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of network-source coordinated control optimization, and in particular to a method and system for optimizing the power regulation amplitude based on the primary frequency regulation of a hydropower unit. Background Art

[0002] With socioeconomic development and improved living standards, electricity has become an essential secondary energy source for production and daily life. Therefore, ensuring a stable and reliable supply of electricity has become one of the most important tasks of the power system. Primary frequency regulation is a fundamental function of grid-connected generator sets. The implementation of primary frequency regulation in hydropower units plays a crucial role in maintaining grid frequency stability and ensuring power supply quality.

[0003] Most hydropower units utilize a single-unit primary frequency regulation control strategy, but hydraulic factors can make primary frequency regulation unstable. This is especially true for hydropower plants with long diversion systems and multiple units per tunnel. When primary frequency regulation is activated, all units operate simultaneously, coupling with each other and causing significant power fluctuations, impacting the actual regulation quality.

[0004] To overcome the shortcomings of single-unit primary frequency regulation, hydropower plants with long diversion systems and multiple generators in one tunnel are currently equipped with a primary frequency regulation grouping regulator to achieve grouped primary frequency regulation. This allows multiple generators in the diversion system to be grouped together, resulting in coordinated and unified operation between the units, thus avoiding the drawbacks of single-unit primary frequency regulation.

[0005] The grouped primary frequency modulation system effectively avoids the drawbacks of coupling between units and large power fluctuations when single-unit primary frequency modulation is activated simultaneously. However, when multiple units are combined into a whole, how can we prevent one or more units from entering the power vibration zone during primary frequency modulation? How can we prevent one or more units from being limited by maximum or minimum power, resulting in the primary frequency modulation adjustment range of the entire group not meeting the requirements?

[0006] Therefore, there is an urgent need to find a method to optimize the primary frequency regulation power adjustment amplitude of hydropower units to meet the performance requirements of the primary frequency regulation power adjustment amount. Summary of the Invention

[0007] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0008] In view of the above existing problems, the present invention is proposed.

[0009] Therefore, the present invention provides a method and system for optimizing the power regulation amplitude based on the primary frequency regulation of a hydropower unit, which can solve the problems mentioned in the background technology.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0011] In a first aspect, the present invention provides a method for optimizing the power regulation amplitude of a hydropower unit based on primary frequency regulation, comprising obtaining a unit operation scheduling instruction and determining a first frequency regulation control parameter according to the unit operation scheduling instruction, wherein the first frequency regulation control parameter includes a unit combination mode and regulator configuration information;

[0012] Acquiring system operating status data, and determining a second frequency modulation control parameter according to the system operating status data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment interval information;

[0013] A frequency regulation target value is obtained, and an adjustment allocation operation is performed according to the frequency regulation target value, wherein the adjustment allocation operation includes transferring the adjustment amount exceeding the preset interval to the adjustment setting value of other units.

[0014] As a preferred solution of the method for optimizing the power regulation amplitude of the primary frequency regulation of the hydropower unit according to the present invention, the unit combination method includes dividing the multiple generator sets put into operation in the water diversion system into at least one frequency regulation control unit;

[0015] The regulator configuration information includes equipping each frequency modulation control unit with a set of frequency modulation group regulators.

[0016] As a preferred solution of the method for optimizing the power regulation amplitude of the primary frequency regulation of the hydropower unit according to the present invention, the operating condition classification information includes a plurality of head conditions divided according to the water level conditions upstream of the reservoir;

[0017] The power adjustment interval information includes dividing the power or opening operation area of ​​each generator set into two types of operation areas: an adjustable area and an unadjustable area under each water head working condition.

[0018] As a preferred solution of the method for optimizing the power adjustment amplitude based on the primary frequency regulation of the hydropower unit according to the present invention, wherein: the adjustable area is an operating area where power or opening adjustment is allowed;

[0019] The non-adjustable area is an operating area where power or opening adjustment is prohibited, including the unit vibration area and the area beyond the maximum power or minimum power available to the unit.

[0020] As a preferred solution of the method for optimizing the power adjustment amplitude of the primary frequency regulation of the hydropower unit according to the present invention, wherein: the frequency regulation target value includes a target power value or a target opening value;

[0021] When the target power value or target opening value of a unit enters the non-adjustable zone, the adjustment amount of the unit that exceeds the adjustable zone is transferred to the target power value or target opening value of other units with adjacent serial numbers.

[0022] As a preferred solution of the method for optimizing the power regulation amplitude based on the primary frequency regulation of a hydropower unit according to the present invention, when the speed governor operates in the power mode, the target power value is obtained based on the unit operating power value, the unit rated power value, the frequency deviation value, the rated frequency value, and the power regulation rate; wherein the target power value is associated with the unit operating power value, the unit rated power value, the frequency deviation value, the rated frequency value, and the power regulation rate;

[0023] When the speed regulator operates in the opening mode, the target opening value is obtained based on the unit operating opening value, the unit full opening value, the frequency deviation value, the rated frequency value and the permanent slip rate; wherein the target opening value is associated with the unit operating opening value, the unit full opening value, the frequency deviation value, the rated frequency value and the permanent slip rate.

[0024] As a preferred solution of the method for optimizing the power adjustment amplitude of the primary frequency regulation of the hydropower unit according to the present invention, the adjustment allocation operation includes:

[0025] If the target power value or target opening value of a certain unit is still within the adjustable range after a frequency regulation action, the target value of the unit shall be kept unchanged;

[0026] If the target power value or target opening value of a unit exceeds the adjustable range after a frequency regulation action, the excess portion will be added to the target power value or target opening value of other units with adjacent serial numbers;

[0027] If the excess cannot be fully allocated to other units with adjacent serial numbers, it will continue to be allocated to subsequent units until the closed-loop adjustment of the entire group is completed.

[0028] In a second aspect, the present invention provides a system for optimizing the power regulation amplitude of a primary frequency regulation of a hydropower unit, comprising: a dispatch instruction parsing module for obtaining a unit operation dispatch instruction and determining a first frequency regulation control parameter based on the unit operation dispatch instruction, wherein the first frequency regulation control parameter includes a unit combination mode and regulator configuration information;

[0029] an operating state classification module, configured to obtain system operating state data and determine a second frequency modulation control parameter according to the system operating state data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment interval information;

[0030] The frequency regulation allocation module is used to obtain the frequency regulation target value and perform the regulation allocation operation according to the frequency regulation target value, wherein the regulation allocation operation includes transferring the regulation amount exceeding the preset range to the regulation setting value of other units.

[0031] In a third aspect, the present invention provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein when the processor executes the computer program, steps of a method for optimizing the power adjustment amplitude of a hydropower unit based on primary frequency regulation are implemented.

[0032] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, the steps of the method for optimizing the power adjustment amplitude of the primary frequency regulation of the hydropower unit are implemented.

[0033] Compared with the existing technology, the beneficial effect of the present invention is that the invention realizes the optimization of the primary frequency regulation power adjustment amplitude of the hydropower unit through three core steps: first, by obtaining the unit operation scheduling instruction and determining the first frequency regulation control parameter, including the unit combination mode and regulator configuration information, the overall planning and modular management of the unit is realized, which significantly improves the system coordination and operation efficiency, while reducing complexity and maintenance costs; second, by collecting the system operation status data and dividing the operating conditions and power regulation intervals, the unit characteristics under different head conditions are clarified, and the risk of vibration zone or over-limit operation is effectively avoided, the system's adaptability to complex environments is enhanced, and the service life of the equipment is extended; finally, by calculating the frequency regulation target value and executing the closed-loop regulation allocation operation, the grid demand is accurately responded to, the overload or instability problem of a single unit is avoided, the load distribution is balanced, and the total frequency regulation of the entire group is ensured. The overall solution significantly improves the frequency regulation response speed, accuracy and system reliability through scientific and reasonable step design and innovative technical means, providing strong technical support for the safe and stable operation of the power grid, and has high practical value and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A flow chart of a method and system for optimizing the power adjustment amplitude of a hydropower unit based on primary frequency regulation provided by one embodiment of the present invention;

[0036] Figure 2 A system module diagram of a method and system for optimizing the power adjustment amplitude of a hydropower unit based on primary frequency regulation, provided by one embodiment of the present invention;

[0037] Figure 3 An internal structural diagram of a computer device based on a method and system for optimizing the primary frequency modulation power adjustment amplitude of a hydropower unit provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present invention more easily understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0041] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a method for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit, comprising:

[0042] Figure 1 A method flow chart of a method and system for optimizing the power adjustment amplitude of a hydropower unit based on primary frequency regulation is shown, including:

[0043] S1: Obtaining a unit operation scheduling instruction, and determining a first frequency regulation control parameter according to the unit operation scheduling instruction, wherein the first frequency regulation control parameter includes a unit combination mode and regulator configuration information;

[0044] In an optional embodiment, the unit combination method includes dividing the multiple generator sets put into operation in the water diversion system into at least one frequency regulation control unit;

[0045] The regulator configuration information includes equipping each frequency modulation control unit with a set of frequency modulation group regulators.

[0046] In an optional embodiment, the system receives a unit operation dispatch instruction from the hydropower plant dispatch center via a preset communication interface (such as optical fiber communication or wireless communication). The instruction typically includes the following key information: target power value or target opening value, unit operation mode, and operating condition requirements;

[0047] The target power value or target opening value is used to guide the target output of the unit during the primary frequency regulation process;

[0048] The unit operation mode is used to indicate whether the unit should operate in power mode or opening mode;

[0049] Operating condition requirements are used to specify the operating conditions of the unit based on current grid demand and reservoir status.

[0050] For example, the dispatching center may issue the following instructions: divide the six grid-connected hydropower units in the water diversion system into two frequency regulation control units, and equip each of them with a set of primary frequency regulation group regulators.

[0051] In one optional embodiment, the division of primary frequency regulation control units is determined based on the number of grid-connected generator sets in the water diversion system and their operating characteristics. Specifically, multiple hydropower generator sets in the water diversion system are divided into at least one frequency regulation control unit based on their geographic location, rated power, operating conditions, and other characteristics. Each frequency regulation control unit participates in primary frequency regulation operations as a whole, improving system coordination and efficiency.

[0052] For example, in a hydropower plant, if there are a total of 6 hydropower units in operation, they can be divided into two frequency regulation control units according to the rated power of the units, with each group containing 3 units.

[0053] In an optional embodiment, each primary frequency modulation control unit is equipped with a primary frequency modulation group regulator. This regulator is responsible for receiving dispatch instructions, collecting operational data, and performing specific frequency modulation operations. Specifically, the primary frequency modulation group regulator is connected to the dispatch center via a communication interface and receives unit operation dispatch instructions in real time.

[0054] The regulator also has the following functions:

[0055] Signal acquisition, including collecting upstream reservoir water level signals, grid frequency signals, active power signals of operating units, and guide vane opening signals;

[0056] Parameter analysis, including parsing the dispatch instructions to extract key information such as unit combination mode, target power value or target opening value;

[0057] The control command generation includes generating corresponding control commands according to the analysis results and transmitting them to the corresponding frequency modulation control unit.

[0058] For example, after a frequency modulation group regulator receives an instruction from the dispatching center, it simultaneously collects the following signals: the water level upstream of the reservoir is 85 meters; the grid frequency is 50.02Hz; the operating power of a unit is 20MW, and the guide vane opening is 70%.

[0059] In an optional embodiment, the specific operation of obtaining the unit operation scheduling instruction and determining the first frequency regulation control parameter may be:

[0060] The system receives operation dispatch instructions from the dispatch center through a preset communication interface;

[0061] The built-in parsing module performs preliminary analysis on the instructions and extracts key information, such as unit combination mode, target power value or target opening value;

[0062] The system generates corresponding control commands based on the analysis results and passes them to the primary frequency modulation group regulator;

[0063] The primary frequency modulation group regulator completes the division of unit combination according to the dispatching instructions and configures corresponding regulators for them.

[0064] For example, specific numerical values ​​are used as follows:

[0065] Suppose the dispatch center issues a command to divide six hydropower units into two frequency regulation control units: Unit A (three units) and Unit B (three units). The system first receives this command through a communication interface and converts it into an internally recognizable digital signal. The parsing module then activates, extracting the unit combination and regulator configuration information. Ultimately, the system generates control commands to divide the six units into two frequency regulation control units and equip each unit with a primary frequency group regulator.

[0066] It should be noted that obtaining unit operation dispatch instructions and determining the first frequency regulation control parameters is crucial for rapidly responding to grid demand and ensuring efficient coordination and flexibility among hydropower units during the primary frequency regulation process. By clarifying the unit combination and regulator configuration information, this method not only improves the system's response speed but also enhances its ability to adapt to complex grid environments. Furthermore, by configuring an independent regulator for each frequency regulation control unit, efficient coordination between units is achieved, laying the foundation for subsequent frequency regulation optimization.

[0067] S2: Acquire system operating status data, and determine a second frequency modulation control parameter according to the system operating status data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment range information;

[0068] In an optional embodiment, the system operating status data includes a water level signal upstream of the reservoir, a grid frequency signal, an active power signal of the operating unit, and a guide vane opening signal. The second frequency regulation control parameter includes operating condition classification information and power regulation range information.

[0069] In an optional embodiment, the system collects the following key operating status data in real time through sensors and primary frequency modulation group regulators:

[0070] The water level signal upstream of the reservoir is used to determine the current operating conditions of the reservoir;

[0071] Grid frequency signal, used to calculate effective frequency deviation and guide primary frequency regulation operation;

[0072] Active power signal of the running unit, used to monitor the actual output power of the unit;

[0073] The guide vane opening signal is used to monitor the guide vane opening status of the unit.

[0074] For example, the primary frequency group regulator of a hydropower plant collects the following data: the water level upstream of the reservoir is 85 meters; the grid frequency is 50.02 Hz; the operating power of a unit is 20 MW; and the guide vane opening is 70%.

[0075] In an optional embodiment, the operating conditions of the hydropower plant are divided into multiple intervals (such as 1, 2, 3, etc.) in the primary frequency modulation group regulator according to the water level signal upstream of the reservoir. Specifically:

[0076] Different heights of the water level upstream of the reservoir correspond to different head conditions, and each head condition represents a specific operating condition.

[0077] For example, assuming that the water level range upstream of the reservoir is 80 meters to 100 meters, it can be divided into the following three operating conditions: the first head condition: 80 meters to 85 meters; the second head condition: 85 meters to 90 meters; the third head condition: 90 meters to 100 meters.

[0078] In this embodiment, if the current water level upstream of the reservoir is 85 meters, the system will classify it as the second head condition.

[0079] In an optional embodiment, the power or opening operating range of the unit is further divided according to different operating conditions. Specifically, if the speed governor operates in power mode, the unit is divided into several Class A areas (adjustable power areas) and Class B areas (non-adjustable power areas) according to the power size of the unit under different operating conditions.

[0080] Class A zones are defined as operating areas where power adjustment is permitted, typically within the unit's stable operating range. Class B zones are defined as operating areas where power adjustment is prohibited, including areas where the unit vibrates and exceeds the unit's maximum or minimum available power. Under different head conditions, the primary frequency modulation group regulator further defines upper and lower power limits for each Class A zone and each Class B zone.

[0081] For example, under the second head condition, the Class A area of ​​a unit ranges from 10MW to 40MW, and the Class B area ranges from 0MW to 10MW and 40MW to 50MW.

[0082] If the speed governor operates in the opening mode, it is divided into several Class A areas (adjustable opening areas) and Class B areas (non-adjustable opening areas) according to the guide vane opening size under different operating conditions, and the upper and lower limits of the opening of each Class A area and the upper and lower limits of the opening of each Class B area are divided.

[0083] For example, under the second head condition, the Class A zone of a unit ranges from 50% to 90%, and the Class B zone ranges from 0% to 50% and 90% to 100%.

[0084] In an optional embodiment, the specific operation of acquiring the system operating status data and determining the second frequency modulation control parameter may be:

[0085] The system uses sensors to collect real-time signals of the upstream water level of the reservoir, the frequency of the power grid, the active power signal of the running units, and the guide vane opening signal;

[0086] Determine the current operating conditions based on the upstream water level signal of the reservoir;

[0087] Based on the current operating conditions, the power or opening operating area of ​​the unit is divided, and the upper and lower limits of the Class A and Class B areas are clearly defined;

[0088] The above operating condition classification information and power regulation interval information are stored in the primary frequency modulation group regulator as the basis for subsequent frequency modulation operations.

[0089] As an example, using specific numerical values, let's assume the system collects the following data: the upstream reservoir water level is 85 meters; the grid frequency is 50.02 Hz; the operating power of a particular unit is 20 MW; and the guide vane opening is 70%. Based on the upstream reservoir water level signal, the system classifies the current operating condition as the second head condition. Under the second head condition, the power operating range of the particular unit is divided into: Class A: 10 MW to 40 MW; Class B: 0 MW to 10 MW and 40 MW to 50 MW. Furthermore, if the speed governor is operating in opening mode, the opening operating range of the unit is divided into: Class A: 50% to 90%; Class B: 0% to 50% and 90% to 100%. The system stores these classification results in the primary frequency regulation group regulator, which serves as the basis for subsequent frequency regulation operations.

[0090] It should be noted that the significance of acquiring system operating status data and determining the secondary frequency regulation control parameters lies in accurately understanding the unit's operating characteristics, providing a scientific basis for primary frequency regulation, and thus improving the accuracy and efficiency of frequency regulation. By dividing operating conditions and power regulation ranges, this method ensures that the unit performs frequency regulation within the permitted range, avoiding equipment damage or performance degradation caused by exceeding the operating range. Furthermore, by dynamically adjusting operating conditions and regulation ranges, the system can adapt to complex and changing power grid environments and maintain efficient and stable operation.

[0091] S3: Obtaining a frequency regulation target value, and performing an adjustment allocation operation according to the frequency regulation target value, wherein the adjustment allocation operation includes transferring the adjustment amount exceeding the preset range to the adjustment set values ​​of other units.

[0092] In an optional embodiment, the frequency regulation target value includes a target power value or a target opening value. The regulation allocation operation includes transferring the regulation amount that exceeds the preset interval to the regulation target values ​​of other units with adjacent serial numbers to achieve closed-loop optimization of the frequency regulation power or opening of the entire unit.

[0093] In an optional embodiment, when the speed regulator operates in the power mode, the target power value is obtained based on the unit operating power value, the unit rated power value, the frequency deviation value, the rated frequency value, and the power modulation rate; wherein the target power value is associated with the unit operating power value, the unit rated power value, the frequency deviation value, the rated frequency value, and the power modulation rate;

[0094] When the speed regulator operates in the opening mode, the target opening value is obtained based on the unit operating opening value, the unit full opening value, the frequency deviation value, the rated frequency value and the permanent slip rate; wherein the target opening value is associated with the unit operating opening value, the unit full opening value, the frequency deviation value, the rated frequency value and the permanent slip rate.

[0095] In an optional embodiment, the frequency modulation target power value or target opening value is calculated by the following formula, including:

[0096] When the speed regulator operates in power mode, the target power value is calculated as follows:

[0097]

[0098] Among them, P i ' is the target power of the primary frequency regulation of the i-th unit in the control unit, P i is the operating power of the i-th unit in the control unit, P ri is the rated power of the i-th unit in the control unit, Δf is the effective frequency deviation of the unit, f r is the rated frequency, e p is the power regulation rate;

[0099] When the speed regulator operates in the opening mode, the target opening value is calculated as follows:

[0100]

[0101] Among them, Y i ' is the target opening degree of the primary frequency regulation of the i-th unit in the control unit, Y i is the operating opening of the i-th unit in the control unit, Y max is the full opening value of the i-th unit in the control unit, Δf is the effective frequency deviation of the unit, f r is the rated frequency, b p is the permanent slip rate.

[0102] In an optional embodiment, the adjusting allocation operation includes:

[0103] If the target power value or target opening value of a certain unit is still within the adjustable range after a frequency regulation action, the target value of the unit shall be kept unchanged;

[0104] If the target power value or target opening value of a unit exceeds the adjustable range after a frequency regulation action, the excess portion will be added to the target power value or target opening value of other units with adjacent serial numbers;

[0105] If the excess cannot be fully allocated to other units with adjacent serial numbers, it will continue to be allocated to subsequent units until the closed-loop adjustment of the entire group is completed.

[0106] In an optional embodiment, the specific steps of performing the adjustment allocation operation according to the frequency adjustment target value are as follows:

[0107] Determine whether the target power value or the target opening value falls into the non-adjustable area (Class B area).

[0108] If the target value is still in the adjustable zone (Class A zone), the target value of the unit will remain unchanged;

[0109] If the target value enters the unadjustable zone (Class B zone), the excess will be transferred to the target values ​​of other units with adjacent serial numbers.

[0110] If the excess cannot be fully allocated to other units with adjacent serial numbers, it will continue to be allocated to subsequent units until the closed-loop adjustment of the entire group is completed.

[0111] When the excess power is not fully distributed after being distributed to the last unit, the remaining power will be circulated and superimposed on the first unit to achieve closed-loop regulation within the group.

[0112] For example, specific numerical values ​​are used as follows:

[0113] Assume that a frequency regulation control unit contains three units, and their target power values ​​are:

[0114] Unit 1: The target power value is 45MW, but its Class A zone ranges from 10MW to 40MW;

[0115] Unit 2: The target power value is 30MW, and its Class A zone range is 10MW to 40MW;

[0116] Unit 3: The target power value is 20MW, and its Class A area range is 10MW to 40MW.

[0117] Since the target power value of the first unit exceeds the upper limit of the Class A zone (40MW), the excess is 45-40=5MW. The system adds this 5MW to the target power value of the second unit. The adjusted target power value is:

[0118] Unit 2: 30 + 5 = 35 MW. If the target power value of Unit 2 remains within the Class A range, no further allocation is required; otherwise, the excess is added to Unit 3. Ultimately, the system ensures that the total power regulation for the entire group meets the requirements.

[0119] In addition, in opening mode, the system's regulation logic is similar to that of power mode. For example, if a unit's target opening value is 95%, but its Class A zone range is 50% to 90%, the excess (95-90=5%) will be transferred to the target opening values ​​of other units with adjacent sequence numbers.

[0120] In an optional embodiment, the adjustment allocation operation includes a first adjustment and a second adjustment, each of which performs refined processing on power changes of different scales:

[0121] First Regulation: For large-scale power changes (Level 1), such as significant fluctuations in grid load, the system prioritizes adjusting the target power or target opening values ​​of the units to quickly respond and stabilize output. For example, if the target power value of a unit exceeds the upper limit of the Class A zone, the system quickly transfers the excess power to other units to ensure that the total frequency regulation of the entire group meets the requirements.

[0122] Secondary adjustment: For small power changes (secondary changes), such as slight fluctuations in transient load, the system fine-tunes relevant parameters (such as guide vane opening or intake air flow) to optimize the system's transient response. For example, when a unit's target power value approaches the boundary of the Class A zone, the system makes small adjustments to the guide vane opening or intake air flow to prevent the target value from entering the unadjustable zone.

[0123] In an optional embodiment, the first and second adjustments can also be adaptively adjusted based on real-time monitored environmental parameters. For example, when fluctuations in external wind speed or air pressure are detected, the system immediately analyzes the impact of these changes on the unit's frequency regulation efficiency and adjusts the adjustment strategy accordingly to ensure that the system maintains optimal operating conditions under different environmental conditions. Furthermore, the system integrates an intelligent learning algorithm that continuously optimizes adjustment parameters through analysis of historical data, improving the accuracy of predictions for future operating conditions. This highly intelligent adjustment method not only greatly improves the system's operating efficiency, but also significantly extends the equipment's service life and reduces maintenance costs.

[0124] In an optional embodiment, the system dynamically adjusts the power or opening threshold according to real-time monitored environmental parameters (such as reservoir water level, grid frequency, etc.). Specifically:

[0125] When a significant change in external conditions (such as water head conditions or grid frequency) is detected, the system will automatically correct the adjustment parameters to adapt to the new operating conditions.

[0126] In addition, the system also has a fault diagnosis function, which can issue an alarm in time when an abnormal situation is detected, and automatically switch to safe mode to ensure the stable operation of the system.

[0127] For example, if the water level upstream of the reservoir rises from 85 meters to 90 meters, the system reclassifies the operating conditions and their corresponding power or opening ranges, and adjusts the regulation strategy to accommodate the new head conditions. Simultaneously, the system dynamically adjusts the correction coefficient based on historical and real-time data to correct errors caused by environmental factors, further improving regulation accuracy.

[0128] It should be noted that the significance of obtaining the frequency regulation target value and executing the regulation allocation operation is to optimize the frequency regulation capability of the hydropower units, avoid frequency regulation failures due to the limitations of a single unit, and thus improve the reliability and stability of the frequency regulation of the entire unit. Through the design of hierarchical regulation and dynamic thresholds, this method not only improves the system's adaptability but also significantly enhances the safety and economy of overall operation. Furthermore, through the closed-loop regulation mechanism, the system can always maintain an efficient and stable operating state in a complex and changing power grid environment, providing a strong guarantee for the safe and stable operation of the power grid.

[0129] Specifically, the preset first dynamic power threshold can be flexibly selected based on the system load, ensuring optimal regulation under different operating conditions. The first and second regulation strategies, respectively, address different levels of power fluctuations and further refine the regulation methods, enabling the system to maintain efficient operation in various scenarios. Furthermore, by real-time monitoring and adjustment of the intake air flow rate and compressor output power, the system's actual operating power is ensured to be highly consistent with the target power, effectively avoiding the regulation lag and over-regulation issues associated with traditional fixed control methods. Overall, this invention not only improves the stability and efficiency of the compressed air energy storage system, but also extends the equipment lifespan, reduces operation and maintenance costs, and provides strong support for the stable operation of the power grid. By dynamically adjusting the threshold, the system can respond more quickly to grid dispatch commands. In particular, when the system load is light, setting a smaller threshold can increase regulation sensitivity, ensuring that the system reaches the target power value in a short period of time. For large-scale power fluctuations, adjusting the compressor speed through the inverter can quickly adjust the power output, shortening the response time and improving the system's dynamic responsiveness. Setting different thresholds for light and heavy load conditions allows the system to adopt the most appropriate regulation strategy under different operating conditions. This not only improves the accuracy of regulation, but also reduces the number of unnecessary adjustments, avoiding instability caused by frequent system switching. For small power changes, adjusting the intake valve opening to control the intake flow rate allows for more precise adjustment of the compressor's output power, ensuring the system maintains stable operation even within a small range. By dynamically adjusting the threshold, the system can set a higher threshold under heavy load conditions, reducing the number of unnecessary adjustments, reducing mechanical wear and equipment fatigue, and extending the equipment's service life. The system can select the most appropriate adjustment method based on actual operating conditions and external conditions, ensuring that the equipment always operates in optimal working condition and avoiding premature aging and failure of equipment due to frequent adjustments.

[0130] Example 2, reference Figure 2-Figure 3 , which is the second embodiment of the present invention, this embodiment further provides a system for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit, comprising:

[0131] a dispatch instruction parsing module, configured to obtain a unit operation dispatch instruction and determine a first frequency modulation control parameter according to the unit operation dispatch instruction, wherein the first frequency modulation control parameter includes a unit combination mode and regulator configuration information;

[0132] an operating state classification module, configured to obtain system operating state data and determine a second frequency modulation control parameter according to the system operating state data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment interval information;

[0133] The frequency regulation allocation module is used to obtain the frequency regulation target value and perform the regulation allocation operation according to the frequency regulation target value, wherein the regulation allocation operation includes transferring the regulation amount exceeding the preset range to the regulation setting value of other units.

[0134] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 3 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for optimizing the power adjustment amplitude based on the primary frequency modulation of a hydropower unit is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a key, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0135] This embodiment further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps: obtaining a unit operation scheduling instruction, and determining a first frequency regulation control parameter according to the unit operation scheduling instruction, wherein the first frequency regulation control parameter includes a unit combination mode and regulator configuration information;

[0136] Acquiring system operating status data, and determining a second frequency modulation control parameter according to the system operating status data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment interval information;

[0137] A frequency regulation target value is obtained, and an adjustment allocation operation is performed according to the frequency regulation target value, wherein the adjustment allocation operation includes transferring the adjustment amount exceeding the preset interval to the adjustment setting value of other units.

[0138] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0139] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiment of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal translation scripting language JavaScript, etc.

[0140] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0141] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0142] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0143] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0144] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for optimizing the power adjustment amplitude of a hydropower unit based on primary frequency regulation, characterized by: include, Obtaining a unit operation scheduling instruction, and determining a first frequency regulation control parameter according to the unit operation scheduling instruction, wherein the first frequency regulation control parameter includes a unit combination mode and regulator configuration information; Acquiring system operating status data, and determining a second frequency modulation control parameter according to the system operating status data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment interval information; A frequency regulation target value is obtained, and an adjustment allocation operation is performed according to the frequency regulation target value, wherein the adjustment allocation operation includes transferring the adjustment amount exceeding the preset interval to the adjustment setting value of other units.

2. The method for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit according to claim 1, characterized in that: The unit combination method includes dividing the multiple generator sets put into operation in the water diversion system into at least one frequency regulation control unit; The regulator configuration information includes equipping each frequency modulation control unit with a set of frequency modulation group regulators.

3. The method for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit according to claim 2, characterized in that: The operating condition classification information includes a plurality of head conditions divided according to the water level conditions upstream of the reservoir; The power adjustment interval information includes dividing the power or opening operation area of ​​each generator set into two types of operation areas: an adjustable area and an unadjustable area under each water head working condition.

4. The method for optimizing the power adjustment amplitude based on the primary frequency modulation of a hydropower unit according to claim 3, characterized in that: The adjustable area is an operating area where power or opening adjustment is allowed; The non-adjustable area is an operating area where power or opening adjustment is prohibited, including the unit vibration area and the area beyond the maximum power or minimum power available to the unit.

5. The method for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit according to claim 4, characterized in that: The frequency modulation target value includes a target power value or a target opening value; When the target power value or target opening value of a unit enters the non-adjustable zone, the adjustment amount of the unit that exceeds the adjustable zone is transferred to the target power value or target opening value of other units with adjacent serial numbers.

6. The method for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit according to claim 5, characterized in that: When the speed regulator operates in the power mode, the target power value is obtained based on the unit operating power value, the unit rated power value, the frequency deviation value, the rated frequency value, and the power modulation rate; wherein the target power value is associated with the unit operating power value, the unit rated power value, the frequency deviation value, the rated frequency value, and the power modulation rate; When the speed regulator operates in the opening mode, the target opening value is obtained based on the unit operating opening value, the unit full opening value, the frequency deviation value, the rated frequency value and the permanent slip rate; wherein the target opening value is associated with the unit operating opening value, the unit full opening value, the frequency deviation value, the rated frequency value and the permanent slip rate.

7. The method for optimizing the power adjustment amplitude based on the primary frequency regulation of a hydropower unit according to claim 6, characterized in that: The adjustment allocation operation includes: If the target power value or target opening value of a certain unit is still within the adjustable range after a frequency regulation action, the target value of the unit shall be kept unchanged; If the target power value or target opening value of a unit exceeds the adjustable range after a frequency regulation action, the excess portion will be added to the target power value or target opening value of other units with adjacent serial numbers; If the excess cannot be fully allocated to other units with adjacent serial numbers, it will continue to be allocated to subsequent units until the closed-loop adjustment of the entire group is completed.

8. A system for optimizing the power regulation amplitude of primary frequency regulation of a hydropower unit, based on the method for optimizing the power regulation amplitude of primary frequency regulation of a hydropower unit according to any one of claims 1 to 7, characterized in that: include, a dispatch instruction parsing module, configured to obtain a unit operation dispatch instruction and determine a first frequency modulation control parameter according to the unit operation dispatch instruction, wherein the first frequency modulation control parameter includes a unit combination mode and regulator configuration information; an operating state classification module, configured to obtain system operating state data and determine a second frequency modulation control parameter according to the system operating state data, wherein the second frequency modulation control parameter includes operating condition classification information and power adjustment interval information; The frequency regulation allocation module is used to obtain the frequency regulation target value and perform the regulation allocation operation according to the frequency regulation target value, wherein the regulation allocation operation includes transferring the regulation amount exceeding the preset range to the regulation setting value of other units.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for optimizing the power regulation amplitude based on the primary frequency regulation of a hydropower unit according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for optimizing the power regulation amplitude based on the primary frequency regulation of a hydropower unit according to any one of claims 1 to 7 are implemented.

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