Method for regulating the operating power of a hydroelectric generator set and device therefor

Abstract

The application provides a method and device for regulating the operation power of a hydroelectric generating set, and relates to the technical field of power regulation of a generating set. The method comprises the following steps: determining multiple operation zones of the operation power of the generating set; if the current operation power of a first generating set put into automatic generation control (AGC) is in a first vibration zone and a second generating set other than the first generating set meets a preset condition, adjusting the current operation power of the first generating set to a limit operation zone by a preset step length, and then performing distribution adjustment based on the AGC; if the total target power value changes and a third generating set in the generating set, whose operation power is in a stable operation zone, meets the preset condition, performing active load replacement among the generating sets based on the AGC until the operation power of any generating set avoids the limit operation zone and reaches the stable operation zone. The application can avoid resource waste, improve the service life and safety of the generating set, and improve the accuracy and efficiency of the operation power regulation of the hydroelectric generating set.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power regulation of generator sets, and particularly relates to a method for regulating operating power of a hydroelectric generator set and a device thereof. BACKGROUND

[0002] In the related art, the vibration value of a hydroelectric generator set in different load operating zones is determined according to the design, manufacture, installation and operating head characteristics of the hydroelectric generator, and if the generator set is operated in the limit operating zone for a long time, fatigue damage of the main equipment will be caused, and the service life of the equipment is reduced.

[0003] Therefore, how to avoid resource waste, improve the service life and safety of the generator set, and improve the accuracy and efficiency of the operating power regulation of the hydroelectric generator set has become one of the important research directions. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, one object of the present application is to provide a method for regulating operating power of a hydroelectric generator set.

[0005] A second object of the present application is to provide a device for regulating operating power of a hydroelectric generator set.

[0006] A third object of the present application is to provide an electronic device.

[0007] A fourth object of the present application is to provide a non-transitory computer readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] To achieve the above object, a first aspect of the present application provides a method for regulating operating power of a hydroelectric generator set, comprising:

[0010] determining a plurality of operating zones of operating power of the generator set, the plurality of operating zones comprising a first vibration zone, a limit operating zone, a second vibration zone and a stable operating zone;

[0011] if the current operating power of a first generator set put into automatic generation control AGC is in the first vibration zone and a second generator set other than the first generator set meets a preset condition, adjusting the current operating power of the first generator set to the limit operating zone by a preset step size, and then performing allocation adjustment based on the AGC;

[0012] If the target total power value changes and the third generator set in the generator set whose operating power is in the stable operating area meets the preset condition, active load replacement is performed between the generator sets based on AGC until the operating power of any generator set avoids the limited operating area and reaches the stable operating area, and the target total power value is a real-time active power target value corresponding to a real-time power load demand.

[0013] The embodiment of the application can ensure that the generator set normally operates in the stable area under the condition of meeting the conditions, automatically reduce the time length of operating in the limited operating area, reduce the fatigue damage of the main equipment, prolong the service life of the equipment, and have good economic benefits; meanwhile, the misoperation risk caused by manual load adjustment operation of the operator is greatly reduced, the operation monitoring work efficiency is improved, the accuracy and efficiency of the operating power adjustment of the hydro-generating set are improved, and resource waste is avoided.

[0014] To achieve the above purpose, the second aspect of the application provides a hydro-generating set operating power adjustment device, comprising:

[0015] A determination module is configured to determine a plurality of operating areas of the operating power of the generator set, and the plurality of operating areas include a first vibration area, a limited operating area, a second vibration area, and a stable operating area.

[0016] A first adjustment module is configured to, if the current operating power of the first generator set put into automatic generation control (AGC) is in the first vibration area and the second generator set other than the first generator set meets the preset condition, adjust the current operating power of the first generator set to the limited operating area by the preset step length, and then perform distribution adjustment based on AGC.

[0017] A second adjustment module is configured to, if the target total power value changes and the third generator set in the generator set whose operating power is in the stable operating area meets the preset condition, perform active load replacement between the generator sets based on AGC until the operating power of any generator set avoids the limited operating area and reaches the stable operating area, and the target total power value is a real-time active power target value corresponding to a real-time power load demand.

[0018] To achieve the above purpose, the third aspect of the application provides an electronic device, comprising:

[0019] at least one processor; and

[0020] a memory in communication with the at least one processor; wherein

[0021] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the hydro-generating set operating power adjustment method provided in the first aspect of the application.

[0022] To achieve the above objectives, a fourth aspect of this application provides a computer-readable storage medium storing computer instructions thereon, wherein the computer instructions are used to cause a computer to execute the power regulation method for a hydro-generator set provided in the first aspect of this application.

[0023] To achieve the above objectives, a fifth aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the power regulation method for a hydro-generator set provided in the first aspect of this application. Attached Figure Description

[0024] Figure 1 This is a flowchart of a method for regulating the operating power of a hydro-generator set according to an embodiment of this application;

[0025] Figure 2 This is a flowchart of a method for regulating the operating power of a hydro-generator set according to an embodiment of this application;

[0026] Figure 3 This is a flowchart of a method for regulating the operating power of a hydro-generator set according to an embodiment of this application;

[0027] Figure 4 This is a structural block diagram of a power regulation device for a hydro-generator set according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0030] The following describes the method and apparatus for regulating the operating power of a hydro-generator set according to embodiments of this application, with reference to the accompanying drawings.

[0031] Figure 1 This is a flowchart of a method for regulating the operating power of a hydro-generator unit according to an embodiment of this application, as follows: Figure 1 As shown, the method includes the following steps:

[0032] S101, determine multiple operating zones for the generator set's operating power, including a first vibration zone, a limited operating zone, a second vibration zone, and a stable operating zone.

[0033] In some embodiments, according to the vibration characteristics of the generator set, the operating range of the generator set is divided from low to high into a first vibration zone - a restricted operating zone - a second vibration zone - a stable operating zone. In the embodiments of the present application, the operating power range of the first vibration zone is [0, Pa], the operating power range of the restricted operating zone is (Pa, Pb], the operating power range of the second vibration zone is (Pb, Pc], and the operating power range of the stable operating zone is (Pc, Pd], where 0 < Pa < Pb < Pc < Pd. Among them, the stable operating zone is the area where the generator set can operate continuously for a long time. In the restricted operating zone, the generator set is not suitable for long-term operation. The vibration zone includes the first vibration zone and the second vibration zone, and these two zones are the vortex band operating conditions zones. In the vortex band operating conditions zones, it is necessary to prohibit the generator set from operating in this area.

[0034] Optionally, Pd can be the rated power of the generator set.

[0035] S102, if the current operating power of the first generator set with automatic generation control (AGC) enabled is in the first vibration zone and the second generator set other than the first generator set meets the preset conditions, after adjusting the current operating power of the first generator set to the restricted operating zone in a preset step, perform distribution adjustment based on AGC.

[0036] The generator set in the embodiments of the present application supports the automatic generation control (AGC) function in the Supervisory Control And Data Acquisition (SCADA) system of the hydropower plant. AGC is one of the advanced functions that the hydropower plant computer monitoring system should have. It automatically controls the active power of the hydropower plant in a fast, economical, and safe manner according to the predetermined adjustment and requirements to meet the requirements of the power system. It comprehensively makes decisions based on the upstream water level, grid load requirements, or the total active power of the power plant given in real time, considering the characteristics of the generator set, operating limit conditions, and other factors, and realizes the optimal economic operation mode of the hydropower plant generation operation on the premise of ensuring the safe operation of the power plant.

[0037] AGC can normally avoid the generator set operating in the vibration zone according to the dispatching全厂有功目标指令值 (the description here seems inaccurate or incomplete, assuming it should be a more specific term). In the embodiments of the present application, in order to avoid damage to hardware equipment and improve the service life of the generator set, the operating power of the generator set is further adjusted based on AGC, so that the operating power of the generator set avoids the restricted operating zone and reaches the stable operating zone.

[0038] In the embodiments of the present application, the preset condition is that the adjustable capacity of the current operating power of any generator set meets the requirement that it will not cross down to the vibration zone. That is to say, after the adjustment to the first generator set, the operating power of the remaining generator sets will still be in the stable operating zone and will not cross down to the first vibration zone or the second vibration zone.

[0039] In some implementations, after the first generator unit is started up, it operates with base load in the first vibration zone. After the unit's AGC is activated, the plant's AGC automatically calculates, based on the operating areas and load adjustment ranges of the other units (i.e., the second generator unit), that the adjustable capacity of the other units will not allow it to move downwards into the vibration zone. The AGC then automatically adjusts the first generator unit into the restricted operating zone with an active power substitution step size Ps (i.e., a preset step size). The first generator unit operates in the restricted operating zone, and adjustments are automatically allocated according to the AGC function. After the unit's AGC is activated, active power substitution between units is automatically performed to adjust the unit to the restricted operating zone, meaning it immediately moves upwards from the first vibration zone to the restricted operating zone.

[0040] In some implementations, if the target total power value changes at this time, the AGC function will automatically allocate and adjust the power, and after the AGC adjustment is completed, the active power replacement adjustment will continue.

[0041] Among them, plant AGC refers to the AGC of all generating units, while unit AGC is the AGC of a single generating unit. Plant AGC is composed of unit AGC. The total target power value, also known as the plant's total active power target value, refers to the real-time active power target value issued by the grid dispatch center to the power plant based on real-time electricity load demand. Active power substitution regulation means that, while keeping the plant's total active power setpoint unchanged, it automatically adjusts the load of other generating units operating in the stable zone to the generating units operating in the restricted operating zone, thus allowing the generating units operating in the restricted operating zone to move out of the restricted operating zone.

[0042] S103, if the target total power value changes and the third generator set whose operating power is in the stable operating range meets the preset conditions, active power load replacement is carried out between generator sets based on AGC until the operating power of any generator set avoids the restricted operating range and reaches the stable operating range.

[0043] The target total power is the target value of real-time active power corresponding to the real-time power load demand.

[0044] In some implementations, if the adjustable capacity of the current operating power of the third generator set located in the stable operating zone is sufficient to prevent it from crossing the vibration zone, it means that the adjustable capacity of the current third generator set is sufficient to adjust the operating power of at least one generator set in the restricted operating zone to the stable operating zone. In this case, if there is only one generator set in the restricted operating zone, the generator in the restricted operating zone can be adjusted based on the AGC allocation value and preset step size to achieve active load replacement between generator sets until the operating power of the generator set avoids the restricted operating zone and reaches the stable operating zone.

[0045] If there are two or more generator sets in the restricted operating area, the generator set that has been running in the restricted operating area for the longest time can be selected for priority adjustment. In other words, the generator set that has been running in the restricted operating area for the longest time can be adjusted based on the AGC allocation value and the preset step size to realize active load replacement between generator sets until the operating power of the generator set avoids the restricted operating area and reaches the stable operating area.

[0046] The embodiments of this application can ensure that the generator set operates normally in a stable region under the condition that it meets the requirements. It can automatically reduce the time that the unit operates in the restricted operating region, which has good economic benefits in reducing fatigue damage to the main equipment and extending the service life of the equipment. At the same time, it greatly reduces the risk of misoperation caused by manual load adjustment by operators, improves the efficiency of operation monitoring, improves the accuracy and efficiency of power regulation of the hydro-generator set, and avoids waste of resources.

[0047] Figure 2 This is a flowchart of a method for regulating the operating power of a hydro-generator unit according to an embodiment of this application, as follows: Figure 2 As shown, the method includes the following steps:

[0048] S201, determine multiple operating zones for the generator set's operating power, including a first vibration zone, a limited operating zone, a second vibration zone, and a stable operating zone.

[0049] S202, if the current operating power of the first generator set that has been put into automatic power generation control (AGC) is in the first vibration zone and the second generator set other than the first generator set meets the preset conditions, the current operating power of the first generator set is adjusted to the restricted operating zone according to the preset step size, and then the distribution adjustment is performed based on AGC.

[0050] For details regarding steps S201 to S202, please refer to the relevant descriptions in the above embodiments; they will not be repeated here.

[0051] S203, if the target total power value changes and the third generator set whose operating power is in the stable operating range meets the preset conditions, obtain the number and operating time of the fourth generator set whose operating power is in the restricted operating range.

[0052] In this embodiment of the application, time statistics variables T1, T2, ... Tn are set to automatically count the duration of each unit's operation in the restricted operating area, where n represents the corresponding unit number. When multiple units are in the restricted operating area at the same time, the unit with the longer operating time is selected first for replacement and adjustment to the stable operating area.

[0053] S204, based on the number and operating time of the fourth generator set and the target total power, determine the fifth generator set to be regulated among the generator sets.

[0054] Furthermore, the active power target command for the entire plant is used as the trigger condition for active power replacement adjustment of the units. When a new active power target value command for the entire plant is received, that is, when the AGC command value changes, and the adjustable capacity of the remaining units is sufficient to avoid the vibration zone, the active power load replacement between units is adopted to automatically avoid the restricted operating zone replacement adjustment of the units.

[0055] Optionally, if the total target power is greater than or equal to the product of the minimum power value in the stable operating area and the first quantity, it means that all units that have put into AGC simultaneously meet the requirement of operating in the stable area, and the fifth generator unit is determined to include the fourth generator unit and the unit with the highest priority for load reduction under small load regulation.

[0056] The first quantity is the total number of AGC generator sets.

[0057] If the number of fourth generator sets is greater than 1, and the total target power is less than the product of the minimum power value in the stable operating area and the first number, obtain the AGC allocation value for any generator set. Obtain the first difference between the AGC allocation value of any generator set and the minimum power value in the stable operating area, and obtain the second difference between the minimum power value in the stable operating area and the allocation value of the fourth generator set. If the sum of the first differences is less than or equal to the second difference, it indicates that the current total target power cannot satisfy all AGC-enabled generator sets to operate in the stable operating area simultaneously. However, the sum of the adjustment margins of the generator sets operating in the stable operating area to the minimum operating power of the stable operating area is sufficient for one generator set to adjust to the stable area. Therefore, it can be determined that the fifth generator set includes the generator set with the highest priority for load reduction under small load adjustment and the generator set with the longest operating time among the fourth generator sets.

[0058] Optionally, the unit with the highest priority for load reduction during low-load regulation can be selected according to a preset unit priority order.

[0059] S205: For any fifth generator set, obtain the AGC allocation value of the fifth generator set, and adjust the operating power of the fifth generator set based on the preset step size and AGC allocation value.

[0060] In some implementations, for any fifth generator set, if the operating power of the fifth generator set is within the restricted operating range, its operating power is adjusted to the sum of its corresponding AGC allocation value and a preset step size, i.e., P. 限 +Ps, where P 限 This represents the AGC allocation value for the fifth generator unit currently operating in the restricted operating area, and Ps represents the single adjustment step size. If the operating power of the fifth generator unit is within the stable operating range, its operating power is adjusted to the difference between its corresponding AGC allocation value and the preset step size, i.e., Ps. 优 +Ps, where P 优This indicates the AGC allocation value for the unit with the highest priority for load reduction during low-load regulation.

[0061] S206, until the operating power of any generator set avoids the restricted operating area and reaches the stable operating area.

[0062] For details regarding step S206, please refer to the relevant descriptions in the above embodiments; they will not be repeated here.

[0063] The embodiments of this application can ensure that the generator set operates normally in a stable region under the condition that it meets the requirements. It can automatically reduce the time that the unit operates in the restricted operating region, which has good economic benefits in reducing fatigue damage to the main equipment and extending the service life of the equipment. At the same time, it greatly reduces the risk of misoperation caused by manual load adjustment by operators, improves the efficiency of operation monitoring, improves the accuracy and efficiency of power regulation of the hydro-generator set, and avoids waste of resources.

[0064] In some implementations, if the difference between the target total power and the actual total power is within a preset difference range during the current adjustment cycle, the next power adjustment operation continues. Alternatively, if the difference between the target total power and the actual total power is not within the preset difference range, the power adjustment operation is stopped during the current adjustment cycle.

[0065] In some implementations, in response to receiving a scheduling instruction for a target total power value during the adjustment process, the updated target total power value in the scheduling instruction is obtained. The step size of the operating power adjustment is updated based on the updated target total power value and the previous target total power value.

[0066] Figure 3 This is a flowchart of a method for regulating the operating power of a hydro-generator unit according to an embodiment of this application, as follows: Figure 3 As shown in this embodiment, various parameters are first obtained, including multiple operating zones of the generator set's operating power, preset adjustment step size, adjustment cycle, and the priority of each unit's adjustment. A "non-optimal operating zone" function enable / disable flag is set for each unit. This means that when the unit engages the AGC function, it automatically avoids the function flag indicating restricted operating zones. "Enabled" indicates that the function is active, and "disabled" indicates that the function is inactive; the function is enabled by default. The allowable deviation range between the target total power value and the actual total power value is set [-P]. B ,P BThis refers to the preset difference range, indicating that the next active power replacement is allowed when the difference between the target total power and the actual total power is within the preset difference range. Setting the "Immediate Crossover" function flag means that after the unit starts up and operates with base load (the minimum load the unit carries when connected to the grid) in the first vibration zone, this function automatically takes effect after the unit's AGC is engaged. Based on the operating areas and load adjustment ranges of the other units, the plant's AGC automatically calculates that if the adjustable capacity of the other units is sufficient to prevent them from crossing the vibration zone downwards, the AGC automatically adjusts the unit into the restricted operating zone with an active power replacement step size Ps. At this time, the "Immediate Crossover" function automatically deactivates, and the unit operates in the restricted operating zone, automatically allocating adjustments according to the AGC function. After the unit's AGC is engaged, automatic inter-unit active power replacement adjusts the unit to the restricted operating zone. If the plant's overall active power target value changes, automatic adjustment is allocated according to the AGC function. After the AGC adjustment is complete, active power replacement adjustment continues.

[0067] Furthermore, the active power target command for the entire plant is used as the trigger condition for active power replacement adjustment of the units. When a new active power target value command for the entire plant is received, that is, when the AGC command value changes, and the adjustable capacity of the remaining units is sufficient to avoid crossing the vibration zone, the active power load replacement method between units is adopted, and the units are automatically adjusted to avoid the restricted operating zone according to the following methods and limiting strategies:

[0068] When one unit is in the restricted operating area, if Pagc > P 未 +n*Pc, where Pagc represents the plant-wide active power target value issued by the scheduler, P 未 This represents the sum of the actual active power generated by units that are not currently using AGC. In this embodiment, all generator units have AGC functionality enabled. 'n' represents the number of units with AGC enabled, and 'Pc' represents the lower edge of the stable operating range, meaning all units with AGC enabled simultaneously operate within the stable range. Therefore, within the first AGC adjustment cycle T, adjustments are made in steps of Ps, meaning Pagc remains unchanged, and the adjustment is redistributed as follows: P 限 +Ps,P 优 -Ps, Plimit represents the AGC allocation value for the unit currently operating in the restricted operating area, Ps represents the single adjustment step size, Plimit 优 This indicates the AGC allocation value of the unit with the highest priority for load reduction and adjustment under low load conditions currently in operation.

[0069] In some implementations, to ensure that the active power of the entire plant remains stable during the adjustment process, a judgment is made within the next adjustment period T. If Pagc-P real power ∈ [-P], then... B ,P B If the value is less than or equal to 0, then the next allocation adjustment will be carried out, i.e.: Plimit + Ps, Ppreferred - Ps.

[0070] In some implementations, if a new scheduling instruction is received during the adjustment process, the active power replacement allocation adjustment between units is paused and adjusted as follows:

[0071] If Pagc_new > Pagc_old, then P 限 + |Pagc_new - Pagc_old|;

[0072] If Pagc_new < Pagc_old, then P 优 - |Pagc_new - Pagc_old|;

[0073] That is, if the new scheduling instruction received is an increase instruction, the increased load value is allocated to the units operating in the restricted operating area; if the scheduling new instruction is a decrease instruction, the decreased load value is allocated to the unit with the highest reduction priority. Here, Pagc_new represents the total target power value newly issued by the scheduling, and Pagc_old represents the total target power value issued by the previous scheduling.

[0074] And so on. After one or more adjustment cycles, the units operating in the restricted operating area are adjusted to the stable operating area. After entering the stable area, to prevent the unit from operating at the edge of the vibration area and the stable area (i.e., the active power distribution is Pc), and in case the unit enters the vibration area due to primary frequency modulation or load fluctuations, in the last step, all units are allocated proportionally.

[0075] When there are m units operating in the restricted operating area, where m > 1, if Pagc ≥ P 未 + n * Pc, that is, all units with AGC input simultaneously meet the condition of operating in the stable area, then the units in the restricted operating area are simultaneously replaced to the stable operating area, and the adjustment process and strategy are the same as those in the above embodiment when a single unit operates in the restricted operating area.

[0076] When there are m units operating in the restricted operating area, where m > 1, if Pagc < P_not + n * Pc, and P1 - Pc + P2 - Pc +... Pn - Pc ≥ Pc - P 限 ’(P1, P2... Pn represent the allocation values of the units with AGC input, and P 限 ’ represents the allocation value of the units in the restricted operating area), that is, Pagc cannot satisfy all units with AGC input to operate in the stable area simultaneously, but the sum of the adjustment margins of the units operating in the stable area towards the lower edge Pc of the stable area meets the condition for one unit to be adjusted to the stable area, then the unit with the longest restricted operating area duration among the units is preferentially adjusted to the stable operating area.

[0077] When Pagc < P 未 + n * Pc, and P1 - Pc + P2 - Pc +... Pn - Pc < Pc - P 限If the sum of the adjustment margins of the units operating in the stable zone to the lower edge Pc of the stable zone is insufficient to adjust a unit in the restricted operating zone to the stable operating zone, then that unit will remain in the restricted operating zone until the load command of the entire plant meets the preset conditions before adjustment is made.

[0078] When it is necessary for a unit in a restricted operating area to not participate in the automatic avoidance of restricted operating area adjustment, the unit can be removed from the "non-optimal operating area" flag according to the setting.

[0079] The embodiments of this application can ensure that the generator set operates normally in a stable region under the condition that it meets the requirements. It can automatically reduce the time that the unit operates in the restricted operating region, which has good economic benefits in reducing fatigue damage to the main equipment and extending the service life of the equipment. At the same time, it greatly reduces the risk of misoperation caused by manual load adjustment by operators, improves the efficiency of operation monitoring, improves the accuracy and efficiency of power regulation of the hydro-generator set, and avoids waste of resources.

[0080] Taking the application of a system and method for automatically avoiding the operation of turbine generator units in restricted operating areas in a large hydropower plant as an example, the hydropower plant has nine 650MW turbine generator units installed.

[0081] Based on the actual unit stability test results, the unit operating area is redefined, and the AGC operating area of ​​each unit is redefined as follows: Vibration zone 1: 0-Pa, Restricted operating area: Pa-Pb, Vibration zone 2: Pb-Pc, Stable operating area: Pc-Pd.

[0082] The actual AGC operating zones of this large hydropower plant were reclassified as follows: Vibration Zone 1: 0-120MW, Restricted Operating Zone: 120MW-220MW, Vibration Zone 2: 220MW-420MW, and Stable Operating Zone: 420MW-650MW.

[0083] Set the "non-optimal operating zone" function enable / disable flag for each unit. When the unit is using the AGC function, it will automatically avoid the function flag for the restricted operating zone. "Enabled" means that the function of the unit is effective, and "disabled" means that the function of the unit is not effective. The function is enabled by default.

[0084] The active power replacement step size Ps for units automatically avoiding restricted operating areas is set to be ≤30MW. The allowable range of deviation between the plant's active power setting and the current actual generation is set to ±20MW. This means that when the absolute value of the difference between the setting and the actual generation is less than 20MW, the next active power replacement is allowed, thereby reducing system power fluctuations during the load adjustment process of units automatically avoiding restricted operating areas.

[0085] Set time statistics variables T1, T2, ... T9 to automatically count the duration of each unit's operation in the restricted operating area. When multiple units are in the restricted operating area at the same time, prioritize the unit with the longer operating time to replace and adjust it to the stable area.

[0086] The "Immediate Crossing" function is set. After the unit is started and operates with base load in vibration zone 1, this function automatically takes effect after the unit's AGC is engaged. Based on the operating areas and load adjustment ranges of the other units, and provided that the adjustable capacity of the other units is sufficient to prevent them from crossing the vibration zone downwards, the plant's AGC automatically adjusts the unit into the restricted operating zone with an active power replacement step size Ps≤30MW. At this time, the "Immediate Crossing" function automatically deactivates, and the unit operates in the restricted operating zone, with automatic allocation and adjustment according to the AGC function.

[0087] At a certain moment, after the unit was started up, Unit 2 was operating at base load, and the remaining units in the plant were put into AGC. The unit operation status is shown in Table 1:

[0088] Table 1

[0089]

[0090] After the AGC of Unit 2 is put into operation, the active power substitution between units is automatically performed to adjust the unit to the restricted operating area. The target value of active power for the entire plant changes, and the active power is automatically allocated and adjusted according to the AGC function. After the AGC allocation is completed, active power substitution adjustment continues. The allocation and adjustment process is shown in Table 2.

[0091] Table 2

[0092]

[0093] From "Time 1" to "Time 3", after Unit 2 is put into AGC, when the target value of the whole plant remains unchanged at 2876, it starts to automatically perform active power replacement adjustment, starting with a step size Ps≤30. At "Time 4", the target value of active power of the whole plant changes, and it is automatically allocated and adjusted according to the AGC of the whole plant. After adjustment, active power replacement adjustment continues. At "Time 7", it is adjusted to the restricted operating area, the "immediate overpass" function is automatically disabled, and the AGC function is automatically allocated and adjusted.

[0094] Furthermore, the active power target command for the entire plant is used as the trigger condition for active power replacement adjustment of the units. When a new active power target value command for the entire plant is received, i.e., the AGC command value changes, and the adjustable capacity of the remaining units is sufficient to prevent downward crossing of the vibration zone, adjustment is carried out by active power load replacement between units. The active power replacement process is shown in Table 3:

[0095] Table 3

[0096]

[0097] At "Time 1", the plant's total active power target is 2892. Unit 2 maintains a 120 MW operating rate. At "Time 2", when the plant's total active power target instruction of 2939 is received, Unit 2 is prioritized for adjustment. The plant's total active power target instruction of 2939 is less than the current AGC of 7 units * 420 = 2940. Unit 2 remains in the restricted operating range, and AGC adjusts according to normal function. At "Time 2", the active power target increases from 2939 to 2963. Since 2963 is greater than 7 * 420 = 2940, the inter-unit active power replacement adjustment is satisfied, and active power replacement begins, increasing in steps of Ps ≤ 30. At "Time 10", Unit 2 is replaced to the stable operating range of 420MW. At "Time 11", the final proportional allocation is made, with each unit allocated 429MW.

[0098] Through active power substitution adjustment between units, Unit 2 automatically adjusted from the restricted operating area to the stable operating area, and the entire process was executed automatically. This application embodiment only illustrates the process of one unit crossing the restricted operating area; the process for multiple units is similar.

[0099] Figure 4 This is a structural diagram of a power regulation device for a hydro-generator set according to an embodiment of the present disclosure, as shown below. Figure 4 As shown, the power regulation device 400 of the hydro-generator unit includes:

[0100] The determination module 410 is used to determine multiple operating zones of the generator set's operating power, including a first vibration zone, a limited operating zone, a second vibration zone, and a stable operating zone;

[0101] The first adjustment module 420 is used to adjust the current operating power of the first generator set to the restricted operating range by a preset step size and then perform distribution adjustment based on AGC if the current operating power of the first generator set that has been put into automatic generation control AGC is in the first vibration zone and the second generator set other than the first generator set meets the preset conditions.

[0102] The second adjustment module 430 is used to perform active load replacement between generator sets based on AGC if the target total power value changes and the third generator set in the generator set whose operating power is in the stable operating range meets the preset conditions, until the operating power of any generator set avoids the restricted operating range and reaches the stable operating range. The target total power value is the real-time active power target value corresponding to the real-time power load demand.

[0103] In some implementations, the preset condition is that the adjustable capacity of the current operating power of any generator set is sufficient to prevent it from crossing the vibration zone. The operating power range of the first vibration zone is [0, Pa], the operating power range of the restricted operating zone is (Pa, Pb], the operating power range of the second vibration zone is (Pb, Pc], and the operating power range of the stable operating zone is (Pc, Pd], where 0 <Pa<Pb<Pc<Pd。

[0104] In some embodiments, the second adjustment module 430 is further configured to:

[0105] Obtain the number and operating time of the fourth generator set whose operating power is located in the restricted operating area;

[0106] Based on the number and operating time of the fourth generator set and the total target power, the fifth generator set to be regulated is determined among the generator sets.

[0107] For any fifth generator set, obtain the AGC allocation value of the fifth generator set, and adjust the operating power of the fifth generator set based on the preset step size and AGC allocation value.

[0108] In some embodiments, the second adjustment module 430 is further configured to:

[0109] If the total target power is greater than or equal to the product of the minimum power value in the stable operating area and the first quantity, the fifth generator set is determined to include the fourth generator set and the generator set with the highest priority for load reduction under small load regulation. The first quantity is the total number of AGC generator sets.

[0110] In some embodiments, the second adjustment module 430 is further configured to:

[0111] If the number of fourth generator sets is greater than 1, and the total target power is less than the product of the minimum power value in the stable operating area and the first number, obtain the AGC allocation value of any generator set.

[0112] Obtain the first difference between the AGC allocation value of any generator set and the minimum power value in the stable operating area, and obtain the second difference between the minimum power value in the stable operating area and the allocation value of the fourth generator set;

[0113] If the sum of the first difference is less than or equal to the second difference, the fifth generator set is determined to include the generator set with the highest priority for load reduction during small load adjustment and the generator set with the longest operating time among the fourth generator sets.

[0114] In some embodiments, the device further includes a processing module 440 for:

[0115] If, within the current adjustment cycle, the difference between the target total power and the actual total power is within the preset difference range, continue to the next power adjustment operation; or

[0116] If the difference between the target total power and the actual total power is not within the preset difference range, power regulation will stop operating within the current regulation cycle.

[0117] In some embodiments, the processing module 440 is further configured to:

[0118] In response to receiving a scheduling instruction for the target total power value during the adjustment process, the updated target total power value in the scheduling instruction is obtained;

[0119] The step size for operating power adjustment is updated based on the updated target total power value and the previous target total power value.

[0120] The embodiments of this application can ensure that the generator set operates normally in a stable region under the condition that it meets the requirements. It can automatically reduce the time that the unit operates in the restricted operating region, which has good economic benefits in reducing fatigue damage to the main equipment and extending the service life of the equipment. At the same time, it greatly reduces the risk of misoperation caused by manual load adjustment by operators, improves the efficiency of operation monitoring, improves the accuracy and efficiency of power regulation of the hydro-generator set, and avoids waste of resources.

[0121] Based on the same concept, embodiments of this application also provide an electronic device.

[0122] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 5 As shown, the electronic device 500 includes a memory 501, a processor 502, and a computer program product stored in the memory 501 and capable of running on the processor 502. When the processor executes the computer program, it implements the aforementioned method for regulating the operating power of the hydro-generator set.

[0123] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0124] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0125] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0126] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0127] Based on the same concept, this application also provides a computer-readable storage medium storing computer instructions thereon, wherein the computer instructions are used to cause a computer to execute the power regulation method for the hydro-generator set described above.

[0128] Based on the same concept, this application also provides a computer program product, including a computer program that, when executed by a processor, provides the above-described method for regulating the operating power of a hydro-generator unit.

[0129] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. This application can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0131] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0132] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A method for regulating the operating power of a hydro-generator unit, characterized in that, include: Multiple operating zones are determined for the operating power of the generator set, including a first vibration zone, a limited operating zone, a second vibration zone, and a stable operating zone; If the current operating power of the first generator set under automatic generation control (AGC) is in the first vibration zone and the second generator set other than the first generator set meets the preset conditions, the current operating power of the first generator set is adjusted to the restricted operating zone by a preset step size, and then the distribution adjustment is performed based on AGC. If the target total power value changes and the third generator set whose operating power is in the stable operating range meets the preset condition, obtain the number and operating time of the fourth generator set whose operating power is in the restricted operating range. Based on the number and operating time of the fourth generator set and the target total power, the fifth generator set to be adjusted is determined among the generator sets; For any fifth generator set, the AGC allocation value of the fifth generator set is obtained, and the operating power of the fifth generator set is adjusted based on the preset step size and AGC allocation value until the operating power of any generator set avoids the restricted operating area and reaches the stable operating area. The target total power value is the real-time active power target value corresponding to the real-time power load demand. The step of determining the fifth generator set to be adjusted among the generator sets based on the number and operating time of the fourth generator set and the target total power value includes: If the number of the fourth generator sets is greater than 1, and the total target power is less than the product of the minimum power value of the stable operating area and the first number, obtain the AGC allocation value of any generator set. Obtain the first difference between the AGC allocation value of any generator set and the minimum power value of the stable operating area, and obtain the second difference between the minimum power value of the stable operating area and the allocation value of the fourth generator set; If the sum of the first differences is less than or equal to the second difference, the fifth generator set is determined to include the generator set with the highest priority for load reduction during small load adjustment and the generator set with the longest operating time among the fourth generator sets.

2. The method according to claim 1, characterized in that, The preset condition is that the adjustable capacity of the current operating power of any generator set is sufficient to prevent it from crossing the vibration zone. The operating power range of the first vibration zone is [0, Pa], the operating power range of the restricted operating zone is (Pa, Pb], the operating power range of the second vibration zone is (Pb, Pc], and the operating power range of the stable operating zone is (Pc, Pd], where 0 <Pa<Pb<Pc<Pd。 3. The method according to claim 1, characterized in that, The step of determining the fifth generator set to be adjusted from among the generator sets based on the number and operating time of the fourth generator set and the target total power value includes: If the total target power is greater than or equal to the product of the minimum power value of the stable operating area and the first quantity, the fifth generator set is determined to include the fourth generator set and the generator set with the highest priority for small load regulation and load reduction, and the first quantity is the total number of AGC generator sets.

4. The method according to any one of claims 1-3, characterized in that, Also includes: If the difference between the target total power and the actual total power is within the preset difference range during the current adjustment cycle, continue to the next step of power adjustment. or If the difference between the target total power and the actual total power is not within the preset difference range, power regulation will stop operating within the current regulation cycle.

5. The method according to claim 4, characterized in that, Also includes: In response to receiving a scheduling instruction for the target total power value during the adjustment process, the updated target total power value in the scheduling instruction is obtained; The step size for adjusting the operating power is updated based on the updated target total power value and the previous target total power value.

6. A power regulation device for a hydro-generator set, characterized in that, include: The determination module is used to determine multiple operating zones of the generator set's operating power, the multiple operating zones including a first vibration zone, a limited operating zone, a second vibration zone, and a stable operating zone; The first adjustment module is used to adjust the current operating power of the first generator set to the restricted operating area by a preset step size if the current operating power of the first generator set that has been put into automatic power generation control (AGC) is in the first vibration zone and the second generator set other than the first generator set meets the preset conditions, and then perform distribution adjustment based on AGC. The second adjustment module is used to obtain the number and operating time of the fourth generator set whose operating power is located in the restricted operating area if the target total power value changes and the third generator set whose operating power is located in the stable operating area meets the preset condition. Based on the number and operating time of the fourth generator set and the target total power, the fifth generator set to be adjusted is determined among the generator sets; For any fifth generator set, the AGC allocation value of the fifth generator set is obtained, and the operating power of the fifth generator set is adjusted based on the preset step size and AGC allocation value until the operating power of any generator set avoids the restricted operating area and reaches the stable operating area. The target total power value is the real-time active power target value corresponding to the real-time power load demand. The second adjustment module is further used for: If the number of the fourth generator sets is greater than 1, and the total target power is less than the product of the minimum power value of the stable operating area and the first number, obtain the AGC allocation value of any generator set. Obtain the first difference between the AGC allocation value of any generator set and the minimum power value of the stable operating area, and obtain the second difference between the minimum power value of the stable operating area and the allocation value of the fourth generator set; If the sum of the first differences is less than or equal to the second difference, the fifth generator set is determined to include the generator set with the highest priority for load reduction during small load adjustment and the generator set with the longest operating time among the fourth generator sets.

7. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-5.

8. A non-transitory computer-readable storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the steps of the method according to any one of claims 1-5.

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