CN116483033A

CN116483033A - Method for quick crossing of unit in vibration area based on AGC system regulation and control of hydropower station

Info

Publication number: CN116483033A
Application number: CN202310410267.7A
Authority: CN
Inventors: 罗蓓; 王殿君; 章海春; 敖永强; 王家发; 马靖; 付伟; 方攀; 黄世荣; 罗成姝; 赵旭东; 杨辉; 于忠义; 韦艳敏; 李东骏; 潘晶娜; 郭文平
Original assignee: Huaneng Lancang River Hydropower Co Ltd
Current assignee: Huaneng Lancang River Hydropower Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-07-25

Abstract

The application provides a method for a unit to quickly pass through a vibration area based on AGC system regulation and control of a hydropower station, which comprises the following steps: setting a matching relation between a water head in the AGC system and the chargeable maximum load of the unit; dividing a vibration area and an operable area of the single vibration area hydroelectric generating set; setting a downward-penetrating target value of the downward-penetrating vibration area, and redefining an operable area of the unit; determining an AGC optimized value, and setting an AGC controllable uplink scheduling strategy corresponding to a unit AGC of the unit based on the AGC optimized value; setting a single step crossing step length and a single step adjustment in-place judging time; setting three working modes of an automatic upward penetrating vibration area, an immediate downward penetrating vibration area and a preferential downward penetrating vibration area, and executing corresponding working modes according to the actual running condition of the unit based on the set parameters. The method can avoid deviation between a dispatching given value and a load curve value in the process of automatically carrying out unit passing through the vibration area through AGC, and ensure that the unit stably and normally passes through the vibration area.

Description

Method for quick crossing of unit in vibration area based on AGC system regulation and control of hydropower station

Technical Field

The application relates to the technical field of hydroelectric generation, in particular to a method for a unit to quickly pass through a vibration area based on AGC system regulation and control of a hydropower station.

Background

At present, the hydroelectric generating set has the characteristics of flexible control, quick start and stop and the like, and can quickly respond to the load demand of a power grid, so that the hydroelectric generating set has important functions of peak regulation, frequency modulation, phase modulation, accident standby and the like in the power grid. In order to ensure safe and stable operation of the power system, ensure the electric energy quality and promote the further development of frequency modulation auxiliary service, the current requirements on the frequency modulation performance of the set are more and more strict, and the hydroelectric generating set needs to be started and stopped frequently and passes through the vibration area frequently.

The vibration area refers to a certain output area of the hydroelectric generating set, cavitation can occur when the set operates in the output area, power of the set is reduced, damage such as cavitation and ablation can occur to part of components, vibration of the set, output swing and the like can be caused, and therefore the set is required to rapidly pass through the vibration area.

In the related art, when the unit is controlled to pass through the vibration area, the whole plant AGC is usually required to be withdrawn, and the unit is driven to pass through the vibration area manually. However, the mode of manually taking the unit to pass through the vibration area increases the adjusting pressure of operators, the adjusting process possibly causes larger deviation between actual sending and scheduling of the whole plant, the unit passes through the vibration area slowly, the frequency modulation service and the AGC input rate are influenced, the optimal operation working condition of the unit is deviated, the vibration and the swing degree of the unit are increased, the fatigue damage of the unit parts is easily caused, and the normal and stable operation of the unit is not facilitated. In some schemes for quickly crossing the vibration area through the AGC, manual adjustment is still needed under certain conditions, and the quick crossing of the vibration area by the AGC unit cannot be realized.

Disclosure of Invention

The present application aims to solve, at least to some extent, one of the technical problems in the related art.

Therefore, the first object of the present application is to provide a method for quickly traversing a vibrating area of a unit based on AGC system regulation of a hydropower station, which can utilize AGC system intelligent regulation of a hydropower station to quickly traverse the vibrating area by setting reasonable traversing step length and three traversing vibrating area modes, so as to solve the problems that a large hydropower station unit cannot stably traverse the vibrating area, the vibrating swing of the unit is large when traversing the vibrating area, and the AGC unit cannot be limited to operate in the vibrating area by a scheduling side strategy.

The second aim of the application is to provide a device for a unit to quickly pass through a vibration area based on the regulation and control of the AGC system of the hydropower station.

To achieve the above objective, an embodiment of a first aspect of the present application provides a method for a unit to quickly traverse a vibration area based on AGC system regulation of a hydropower station, including the following steps:

setting a matching relation between a water head in the AGC system and the chargeable maximum load of the unit according to the comprehensive characteristic curve of the water turbine and the running condition of the unit;

dividing a vibration area and an operable area of the single vibration area hydroelectric generating set;

Setting a downward target value of a downward vibration area, and re-determining an operable area of the unit by combining the downward target value, an upper limit threshold value of the vibration area and a maximum load of the unit;

determining an AGC optimized value according to the downlink target value and the upper limit threshold value of the vibration area, and setting an AGC controllable uplink scheduling strategy corresponding to a unit AGC based on the AGC optimized value;

setting a single step crossing step length and single step adjustment in-place judging time, and detecting whether a unit real sending value tracks a given value or not by combining the single step crossing step length, the single step adjustment in-place judging time and a single machine AGC maximum time;

setting three working modes of an automatic upward penetrating vibration area, an immediate downward penetrating vibration area and a preferential downward penetrating vibration area, and executing corresponding working modes according to the actual running condition of the unit based on the set parameters.

Optionally, in an embodiment of the present application, the setting a matching relationship between a water head in the AGC system and a maximum load that can be carried by the unit includes: and defining the number of data of the maximum output corresponding to the water head in a configuration file of matching the water head and the load of the AGC program, and configuring the corresponding relation between any water head and the maximum load of the unit.

Optionally, in an embodiment of the present application, the dividing the vibration area and the operable area of the single vibration area hydro-generator set includes: determining a vibration area of the hydroelectric generating set according to a stability test result of the hydroelectric generating set in a full water head range, and setting the vibration area range in the operation parameters of the AGC system; the operable zone is automatically calculated from the head and vibration zone by an AGC program.

Optionally, in an embodiment of the present application, the setting a pull-down target value of the pull-down vibration area includes: setting a corresponding downward-penetrating target value according to the reverse power of the unit in the downward-penetrating vibration area process of the unit, and taking the downward-penetrating target value as an automatic upward-penetrating base load waiting value of the unit; the operational area of the unit is redetermined by the following formula:

Por＝[0，Pt]，

Por＝[Pv，Pm]

wherein, por is a redetermined unit operable area, pt is a pull-down target value, pv is an upper limit threshold value of a vibration area, and Pm is a unit chargeable maximum load.

Optionally, in an embodiment of the present application, the setting, based on the AGC optimization value, an AGC controllable uplink scheduling policy corresponding to a stand-alone AGC of a unit includes: setting an AGC optimization judgment threshold value of a unit; setting the uplink scheduling single machine AGC state to be 1 under the condition that the single machine AGC is put in and the AGC optimized value is larger than the AGC optimized judgment threshold value; under the condition that the single machine AGC is controllable and the AGC optimized value is larger than the AGC optimized judgment threshold, setting the single machine AGC controllable state of the uplink scheduling to be 1; setting 0 for the single machine AGC state of the uplink scheduling under the condition that the single machine AGC is put in and the AGC optimized value is smaller than the AGC optimized judgment threshold; when the single machine AGC exits, setting the state of the single machine AGC of the up-sending scheduling to 0; setting 0 for the single machine AGC controllable state of the uplink scheduling under the condition that the single machine AGC is controllable and the AGC optimized value is smaller than the AGC optimized judgment threshold; and setting the uplink scheduling single machine AGC controllable state to 0 when the single machine AGC is uncontrollable.

Optionally, in an embodiment of the present application, the detecting whether the real set transmission value tracks the given value by combining the single step crossing step length, the single step adjustment to the in-place judgment time and the stand-alone AGC maximum time includes: when the single step adjustment is in place and the deviation between the actual sending value of the unit and the given value is continuously larger than the single step crossing step length multiplied by a preset coefficient, the given value of the next step is sent out through the AGC system; and under the condition that the single-step adjustment in-place judging time is exceeded and the single-machine AGC maximum time is reached, and the deviation is continuously larger than the single-step crossing step length multiplied by a preset coefficient, exiting the flow of automatically crossing the vibration area and the single-machine AGC, and checking the abnormal reason.

Optionally, in one embodiment of the present application, performing an automatic up-threading vibration region operating mode includes: judging whether the machine needs to be started or not according to a scheduling load curve, and normally distributing the load to each unit which is put into AGC according to a load distribution principle through the AGC system under the condition that the machine needs to be started; after the machine set is started and connected, reactive power of the machine set is set to be 0, whether the machine set normally runs with basic load is checked, residual load is distributed through the AGC system, and after the fact that active regulation enabling of the machine set is put into normal is determined, the machine set is put into AGC; when the condition of automatically passing through the vibration area is met, setting the AGC optimal value of the unit in the vibration area to be equal to the waiting value of the unit passing through the base load; judging whether the process of passing through the vibration area on the whole plant AGC target value and the unit meets corresponding preset conditions in real time, and under the condition that the preset conditions are not met, redistributing residual load to ensure that the whole plant load actual sending value tracks the scheduling given value; based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, a machine set with a crossing vibration area automatically passes through the vibration area step by step through the AGC system according to the deviation of a machine set actual sending value and a given value; and scheduling and optimizing according to the deviation in real time through the AGC system, and ending the automatic threading flow after the load adjustment of the current threading vibration area unit is consistent with that of other units which are put into AGC.

Optionally, in one embodiment of the present application, performing a preferential drop-down vibration zone mode of operation includes: judging whether the unit can fall into a vibration area to operate according to the scheduling load curve, and judging whether the condition of preferentially penetrating through the vibration area is met according to the AGC input state and the unit state under the condition that the unit falls into the vibration area to operate; when the condition that the vibration area is penetrated downwards preferentially is met, judging whether the AGC target value of the whole plant and the capacity of other AGC-input units meet preset conditions in real time, and automatically and synchronously reducing the load of the AGC units to the upper edge of the vibration area according to a scheduling given value by an AGC system under the condition that the preset conditions are not met; setting the AGC optimal value of the unit in the downward-penetrating vibration area to be equal to the downward-penetrating target value; based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, a machine set which automatically takes priority to pass through a vibration area gradually crosses the vibration area through the AGC system according to the deviation between the actual sending value and the given value of the machine set; scheduling and optimizing according to the deviation in real time through the AGC system, and ending the preferential downward-threading flow when the actual value of the unit of the current downward-threading vibration region is smaller than or equal to the sum value of the downward-threading target value and the dead zone of the single machine; and after the preferential underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

Optionally, in one embodiment of the present application, performing the immediate underpass vibration zone operation mode includes: when the machine is required to be stopped, judging whether the condition of penetrating through the vibration area immediately is met or not by combining the AGC input state and the unit state; when the condition of instantly penetrating through the vibration area is met, judging whether the AGC target value of the whole plant and the capacity of other units put into AGC meet preset conditions in real time, and carrying out normal load distribution according to a scheduling given value through an AGC system under the condition that the preset conditions are not met; setting the AGC optimal value of the unit in the downward-penetrating vibration area to be equal to the downward-penetrating target value; based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, a machine unit automatically and instantly penetrating through a vibration area gradually crosses the vibration area through the AGC system according to the deviation between the actual sending value and the given value of the machine unit; scheduling and optimizing according to the deviation in real time through the AGC system, and ending the immediate downward flow when the actual value of the unit in the current downward vibration area is smaller than or equal to the sum of the downward target value and the dead zone of the single machine; and after the instant underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

To achieve the above objective, an embodiment of a second aspect of the present application provides a device for a unit to quickly pass through a vibration area based on AGC system regulation of a hydropower station, including:

the first setting module is used for setting a matching relation between a water head in the AGC system and the chargeable maximum load of the unit according to the comprehensive characteristic curve of the water turbine and the operation working condition of the unit;

the dividing module is used for dividing a vibration area and an operable area of the single-vibration-area hydroelectric generating set;

the determining module is used for setting a downward-penetrating target value of a downward-penetrating vibration area and re-determining an operable area of the unit by combining the downward-penetrating target value, an upper limit threshold value of the vibration area and the maximum load of the unit;

the second setting module is used for determining an AGC optimized value according to the downlink target value and the upper limit threshold value of the vibration area, and setting an AGC controllable uplink scheduling strategy corresponding to the unit single machine AGC based on the AGC optimized value;

the detection module is used for setting a single step crossing step length and single step adjustment in-place judging time, and detecting whether the real sending value of the unit tracks a given value or not by combining the single step crossing step length, the single step adjustment in-place judging time and the single machine AGC maximum time;

The execution module is used for setting three working modes of an automatic upward penetrating vibration area, an immediate downward penetrating vibration area and a preferential downward penetrating vibration area, and executing corresponding working modes according to the actual running condition of the unit based on the set parameters.

The technical scheme provided by the embodiment of the application at least brings the following beneficial effects: the method and the device can solve the contradiction that the scheduling side can not lead the input AGC unit to operate in the vibration area and the AGC belt unit of the power station to pass through the vibration area and keep the AGC group, and ensure that the scheduling given value does not deviate from the load curve by respectively calculating the single machine AGC and the AGC controllable state in the station and the single machine AGC and the AGC controllable state in the dispatching. Moreover, the machine set can be put into AGC (automatic gain control) groups after being started and connected in advance, and the machine set can be kept waiting at an upper penetrating base value when the automatic crossing condition is not met, and the vibration area can be automatically, rapidly and stably penetrated when the condition is met. The method divides the downward vibration into two modes of preferential downward and immediate downward, and can selectively input the corresponding downward mark according to actual operation requirements so as to meet the requirements of various aspects of daily operation and emergency treatment. The method can realize the rapid and stable automatic AGC with the unit crossing of the vibration area, and obviously reduce the vibration and the swing degree out-of-limit alarm of the unit in the crossing process. Moreover, the vibration area is worn down and is worn up the vibration area by one to one with automatic promptly to realize the unit, and the unit rotation of being convenient for and the emergent disposition of accident.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein,

FIG. 1 is a flow chart of a method for a unit to quickly pass through a vibration area based on AGC system regulation of a hydropower station according to an embodiment of the application;

FIG. 2 is a flowchart of an implementation method for automatically traversing a vibration area according to an embodiment of the present application;

FIG. 3 is a flowchart of a method for executing a preferred downward vibration region operation mode according to an embodiment of the present application;

FIG. 4 is a flowchart of a method for executing an immediate downward vibration region operation mode according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a device for a unit to quickly pass through a vibration area based on AGC system regulation of a hydropower station according to an embodiment of the present application.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

It should be noted that, in the current power system, automatic power generation control (Automatic Generation Control, abbreviated as AGC) is adopted, the AGC is a system for adjusting active outputs of multiple generators of different power plants in response to load changes, and the AGC can control output force of a frequency modulation unit so as to meet continuously changing power demands of users. In the embodiments of the present application, a water turbine set that participates in AGC adjustment is described as being put into AGC.

In some related embodiments, the scheme for driving the unit to quickly pass through the vibration area through the AGC is as follows: after the start-up or shut-down machine set passes through the vibration area mark rapidly, the adjustable output of the machine set is sent to the dispatching strategy to subtract the output of the machine set in the upper or lower vibration area for the current adjustable output calculated by AGC.

However, because the calculation of the AGC error prevention strategy at the dispatching side is complex, the problem that the dispatching cannot be carried out in a vibration area due to the fact that the AGC machine set is put into operation by only modifying the upper limit of the adjustable output force of the upward dispatching can not be solved, or the problem that the dispatching given value and the load curve value have deviation and the machine set cannot normally pass through the vibration area can be caused. In the method, only one mode is arranged for penetrating the vibration area downwards, the vibration area is penetrated downwards after the load is brought to the upper edge of the vibration area, and the situation that the load of the unit needs to be penetrated downwards immediately when the unit is stopped or the load is switched in emergency is not considered, and the load is manually adjusted at the moment.

Therefore, the method for rapidly traversing the vibration region of the unit based on the AGC system regulation of the hydropower station is provided, and the method combines the comprehensive analysis of the AGC intelligent regulation and the unit regulation performance with the comprehensive characteristics of the water turbine of the unit and the full-head stability test result, so that the single-vibration-region water turbine generator set rapidly traverses the vibration region under the intelligent regulation of the AGC system.

The embodiment of the invention provides a method and a device for a unit to quickly pass through a vibration area based on the regulation and control of a hydropower station AGC system.

Fig. 1 is a flowchart of a method for a unit to quickly pass through a vibration area based on AGC system regulation of a hydropower station according to an embodiment of the present application, as shown in fig. 1, the method includes the following steps:

and step S101, setting a matching relation between a water head in the AGC system and the chargeable maximum load of the unit according to the comprehensive characteristic curve of the water turbine and the operating condition of the unit.

Specifically, various data such as the comprehensive characteristic curve of the existing water turbine and the pre-collected unit operation condition result are analyzed, and the matching relation between the water head and the chargeable maximum load of the unit is determined according to the maximum output corresponding to different water heads. The output force refers to the amount of converting a certain flow into electric energy by a unit under a certain water head.

In one embodiment of the present application, specifically, when the matching relationship is set, the number of data of the maximum output corresponding to the water head may be defined in a configuration file of matching the water head and the load of the AGC program, and the corresponding relationship between any one of the water heads and the maximum load of the unit may be configured. Specifically, in the configuration file of matching the AGC program water head with the load, the data number of the maximum output corresponding to the water head can be freely defined, the corresponding relation between a certain water head H matched with the defined number and the maximum load Pm of the unit is configured, the more the matching relation is set, the more accurate the maximum load of the unit can be carried by the corresponding water head.

Step S102, a vibration area and an operable area of the single-vibration-area hydroelectric generating set are divided.

The operable region refers to a region which can enable the water turbine generator set to stably operate except the vibration region in the output region of the water turbine generator set.

In one embodiment of the present application, dividing a vibrating area and an operable area of a single vibrating area hydro-generator set includes: determining a vibration area of the hydroelectric generating set according to a stability test result of the hydroelectric generating set in a full water head range, and setting the vibration area range in the operation parameters of the AGC system, for example, [0, pv ], wherein Pv is the upper limit of the vibration area; the operable zone is then automatically calculated from the head and vibration zone by an AGC program.

Step S103, setting a downward target value of the downward vibration area, and re-determining the operable area of the unit by combining the downward target value, the upper limit threshold of the vibration area and the maximum load of the unit.

Specifically, the target value of the downward-penetrating vibration area is set in the step, and then the temporary operable area of the unit is redefined.

In one embodiment of the application, a corresponding downward target value is set for the reverse power of the unit in the downward vibration region process of the unit, and the downward target value is used as an automatic upward base load waiting value of the unit. Specifically, in order to avoid reverse power of the unit caused by overshoot in the process of passing through the vibrating area under the unit, a reasonable passing-down target value Pt needs to be set, and the value is also used as an automatic passing-up base load waiting value of the unit.

Further, the operational area of the unit is redetermined by the following formula:

Por＝[0，Pt]，

Por＝[Pv，Pm]

wherein, por is the redetermined unit operable area, namely the redefined unit temporary operable area, pt is the downward-penetrating target value, pv is the upper threshold value of the vibration area, and Pm is the maximum chargeable unit load.

And step S104, determining an AGC optimized value according to the downlink target value and the upper limit threshold value of the vibration area, and setting an AGC controllable uplink scheduling strategy corresponding to the unit AGC based on the AGC optimized value.

Specifically, the step is to set a unit single machine AGC and an AGC controllable uplink scheduling strategy.

Because of the policy configuration at the dispatch side, the AGC unit is not put into operation in the vibration area. The AGC belt unit passes through the vibration area and needs the unit AGC to be kept in an input state, when the unit AGC is judged to be started according to a dispatching load curve, an operation and maintenance personnel inputs the unit AGC after the startup and the grid connection, the unit automatically goes up and takes effect, the unit is kept on the basis load to wait, the dispatching gives a given value in real time according to the load curve, but at the moment, the dispatching gives a given value larger than the sum of the vibration areas of the unit AGC due to the dispatching strategy configuration, and the dispatching given value and the curve value have deviation. When the operator inputs a downward-penetrating mark according to the scheduling load curve and manually judges that the machine needs to be stopped, and when downward-penetrating conditions are met, the AGC automatically takes a downward-penetrating vibration area of the machine set, but due to scheduling side strategy configuration, scheduling always gives a given value which is larger than the sum of the vibration areas of the AGC machine set, and the scheduling given value and the load curve value are deviated, so that the machine set cannot normally penetrate the vibration area. Therefore, a unit AGC and an AGC controllable uplink scheduling strategy are required to be set, so that the unit can normally pass through the vibration area and the scheduling given value and the load curve cannot deviate.

It should be further noted that, since the AGC optimum value does not allow the unit to operate in the vibration area, the AGC optimum value is only 2 possible:

first, the unit does not meet the requirement of automatic up-threading vibration area or the unit meets the requirement of down-threading vibration area, and the AGC optimal value is equal to the down-threading target value, and can be expressed as:

Po＝Pt。

wherein Po is an AGC optimized value, pt is a unit pull-down target value, and is also a unit automatic pull-up base load waiting value.

Secondly, when the unit meets the requirement that the unit automatically passes through the vibration area or normally participates in load distribution outside the vibration area, the AGC optimal value is greater than or equal to the upper limit of the vibration area of the unit, and the AGC optimal value can be expressed as:

Po≥Pv。

wherein Pv is the upper edge of the vibration area of the unit.

Therefore, the embodiment of the application fully utilizes the characteristic of the AGC optimized value, and brings the AGC optimized value into the unit single AGC and the AGC controllable uplink scheduling comprehensive operation.

In specific implementation, in one embodiment of the present application, setting an AGC controllable uplink scheduling policy corresponding to a unit AGC based on an AGC optimization value includes setting a unit AGC optimization judgment threshold, specifically, adding a unit AGC optimization judgment threshold Pth, where a range of values of Pth is as follows:

Pt<Pth<Pv。

pt is a unit downward penetration target value, is also an automatic upward penetration base load waiting value, and Pv is the upper edge of a unit vibration area. Pth may be set according to specific needs. The following describes a single AGC and an AGC controllable uplink scheduling policy set in this embodiment, which specifically includes the following cases:

And setting the uplink scheduling single machine AGC state to be 1 under the condition that the single machine AGC is put in and the AGC optimized value is larger than the AGC optimized judgment threshold, namely when Po > Pth.

And under the condition that the single machine AGC is controllable and the AGC optimized value is larger than the AGC optimized judgment threshold, namely when Po > Pth, setting the single machine AGC controllable state of the uplink scheduling to be 1.

And setting the uplink scheduling single machine AGC state to 0 under the condition that the single machine AGC is put and the AGC optimized value is smaller than the AGC optimized judgment threshold, namely when Po < Pth. And when the single machine AGC exits, setting the state of the uplink scheduling single machine AGC to 0.

Setting the uplink scheduling single machine AGC controllable state to 0 under the condition that the single machine AGC is controllable and the AGC optimized value is smaller than the AGC optimized judgment threshold, namely when Po < Pth; when the single machine AGC is not controllable, the controllable state of the single machine AGC for uplink scheduling is set to 0.

Step S105, setting a single step crossing step length and a single step adjustment in-place judging time, and detecting whether the real sending value of the unit tracks a given value or not by combining the single step crossing step length, the single step adjustment in-place judging time and the single machine AGC maximum time.

Specifically, the method drives the unit to automatically pass through the vibration area through AGC, adopts a real-time optimization multiple allocation strategy, and needs to set a reasonable single-step crossing step length Ps and single-step adjustment in-place maximum time Ts in order to ensure that the unit rapidly and stably passes through the vibration area. The specific numerical value can be set according to the current working condition, the requirement for crossing the vibration area and other factors.

In one embodiment of the present application, during the process of traversing the vibration region, when the deviation between the actual set and the given value is smaller than a certain value of the single-step traversing step Ps in the Ts period, the next target value is issued.

Furthermore, in order to avoid that real-time and dispatch setting deviate due to long-time untracked setting, the method and the device also detect whether the real-time value of the unit tracks a given value. Specifically, a power deviation exit mark and a stand-alone AGC maximum time Tm are set, wherein Tm is greater than Ts. And combining Ps, ts and Tm for tracking detection.

In one embodiment of the present application, combining a single step crossing step length, a single step adjustment in-place determination time and a single machine AGC maximum time, detecting whether a set real sending value tracks a given value includes:

when the unit real sending value and the given value are within the single-step adjustment in-place judging time and the deviation is continuously larger than the single-step traversing step length multiplied by the preset coefficient, the given value of the next step is issued through the AGC system; and under the condition that the single-step adjustment in-place judging time is exceeded and the single-machine AGC maximum time is reached, and the deviation is continuously larger than the single-step crossing step length multiplied by a preset coefficient, exiting the flow of automatically crossing the vibration area and the single-machine AGC, and checking the abnormal reason.

Specifically, the preset coefficient in this embodiment is used to calculate a constant value with the single-step traversing step Ps for comparison, and the system can be set according to the requirement of detection precision. If the deviation between the actual and the given value in the TS time period is always larger than a certain value of the single-step crossing step length Ps, the next given value is issued, and if the deviation between the given value and the actual value in the Tm time period is still larger than a certain value of Ps, the crossing mark and the single machine AGC are exited, and the load of the machine set is checked to be not tracked for the given reason in time.

Step S106, setting three working modes of an automatic upward penetrating vibration area, an immediate downward penetrating vibration area and a preferential downward penetrating vibration area, and executing corresponding working modes according to the actual running condition of the unit based on the set parameters.

The parameters based on which the control unit executes the corresponding working mode comprise the parameters involved in the steps of the downward target value, the single step crossing step length, the single step adjustment in-place judgment time, the single machine AGC maximum time and the like.

Specifically, an automatic upward-penetrating vibration area, an immediate downward-penetrating vibration area and a preferential downward-penetrating vibration area working mode are set, no mark is arranged in the automatic upward-penetrating mode, and each unit is provided with a mark which is marked in the immediate downward-penetrating mode and the preferential downward-penetrating mode, so that the mark which needs to be put into at present can be selected independently according to actual operation requirements. The specific flow of performing these three modes of operation is described in detail below.

In order to more clearly illustrate a specific implementation process of the present application for executing the automatic up-threading vibration area operation mode, an exemplary description is given below of an execution method of the automatic up-threading vibration area operation mode set forth in an embodiment of the present application.

Fig. 2 is a flowchart of a method for executing an automatic vibration area passing-up operation mode according to an embodiment of the present application, as shown in fig. 2, the method includes the following steps:

step S201, judging whether the machine needs to be started or not according to the scheduling load curve, and normally distributing the load to each unit which is put into the AGC through the AGC system according to the load distribution principle under the condition that the machine needs to be started.

Specifically, whether the machine needs to be started or not can be judged according to the dispatching load curve, if the machine needs to be started, an operator gives a machine set starting grid-connected instruction in advance, the AGC normally distributes the load to other input AGC machine sets according to a load distribution principle, and the like, so that the real dispatching given value tracking of the load actual sending value of the whole plant is ensured.

And S202, after the machine set is started and connected, reactive power of the machine set is set to be 0, whether the machine set normally runs with a foundation load is checked, residual load is distributed through an AGC system, and after the fact that active regulation enabling of the machine set is normally put into operation is determined, the machine set is put into AGC.

Specifically, after the unit is started and connected, reactive power of the unit is set to be 0, normal load operation of the unit is checked, and the AGC normally distributes residual load to other AGC units for execution. And after checking that the active power adjustment enabling of the unit is put into normal operation, the operator inputs the AGC groups.

And step S203, when the condition of automatically passing through the vibration area is met, setting the AGC optimal value of the unit passing through the vibration area to be equal to the waiting value of the unit passing through the base load.

Specifically, the conditions for automatically passing through the vibration area are as follows: the AGC input of the whole plant, the machine set grid-connected state and the machine set single machine AGC input meet the conditions, when the AGC input of the whole plant, the machine set grid-connected state and the machine set single machine AGC input are met, the AGC automatically takes effect by passing through the vibration area, and the machine set AGC optimal value of the vibration area to be passed through is equal to the waiting value of the machine set passing through base load, namely Po=Pt.

And step S204, judging whether the process of passing through the vibration area on the whole plant AGC target value and the unit meets the corresponding preset condition in real time, and under the condition that the preset condition is not met, redistributing the residual load to ensure that the whole plant load actual sending value tracks the scheduling given value.

Specifically, the preset conditions in this step are: the AGC target value of the whole plant is larger than or equal to +20MW of the sum of the upper edges of the vibration areas of the input AGC machine set, and other input AGC lower-penetrating vibration areas cannot be caused by the upper-penetrating vibration areas of the machine set. And judging whether the process of penetrating through the vibration area on the whole plant AGC target value and the unit meets the respective corresponding conditions or not in real time through an AGC program. If the load distribution principle is not satisfied, the load distribution principle is adopted to ensure that the load actual value of the whole plant tracks the scheduling given value. If so, the AGC re-optimizes the allocation and then proceeds to the next step.

Step S205, based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, the machine set with the upper crossing vibration area automatically passes through the vibration area step by step through the AGC system according to the deviation of the real sending value and the given value of the machine set.

Specifically, the AGC automatically takes the machine set penetrating the vibration area to penetrate the vibration area, the active set value of the machine set is issued step by step according to the set penetrating step length Ps, and load deviation generated by the penetrating process of the machine set is matched one by other input AGC machine sets. And when the single-step adjustment is within the in-place maximum time Ts, and the given and actual deviation of the set of the upward-penetrating vibration region is smaller than a certain value of the single-step crossing step length Ps, continuing to deliver the next given value. If the single step is not adjusted in place within the maximum time TS, then a given value is issued once, the other AGC units are put into one-to-one matching, the power deviation exit mark and the single machine AGC maximum time Tm are still not adjusted in place, and the single machine AGC is exited.

And S206, scheduling and optimizing according to the deviation in real time through the AGC system, and ending the automatic threading flow after the load adjustment of the current unit threading the vibration area is consistent with that of other units which are put into AGC.

Specifically, AGC optimizes in real time according to the scheduling given value and actual value deviation, and after the load adjustment of the unit in the upward-penetrating vibration area is consistent with that of other AGC units, the unit automatically fails in upward-penetrating.

In this embodiment, when it is determined that two or more units are required to be started and the grid-connected belt base load waits to be threaded according to the scheduling load curve, the units AGC to be threaded are sequentially input according to the sequence of the required machine threading, one unit threading vibration area is automatically carried when one threading condition is met, other units wait at the base load, the machine threading is completed, the other units threading vibration area is continuously carried when the other unit threading conditions are met, and only one unit passes through the vibration area at the same time. In the traversing process, AGC optimizes distribution in real time, and ensures real-time tracking and scheduling given values of the whole factory.

In order to more clearly illustrate the specific implementation process of the execution priority downward-penetrating vibration region working mode of the present application, an exemplary description is given below of an execution method of the priority downward-penetrating vibration region working mode set forth in the embodiment of the present application.

Fig. 3 is a flowchart of a method for executing a working mode of preferentially penetrating through a vibration region according to an embodiment of the present application, as shown in fig. 2, the method includes the following steps:

step S301, judging whether the unit falls into a vibration area to operate according to the dispatching load curve, and judging whether the condition of preferentially downwards penetrating the vibration area is met according to the AGC input state and the unit state under the condition that the unit falls into the vibration area to operate.

Specifically, whether the curve value can cause the input AGC unit to fall into the vibration region for operation is judged according to the load curve scheduled at the subsequent moment, if the input AGC unit can cause the unit to fall into the vibration region for operation, the operator inputs the unit to 'preferentially pass through' the vibration region mark. The "preferential drop-down" flag input conditions are: all the conditions are met, namely, all the plant AGC is input, the unit power generation state, the unit AGC is input, all the units pass through the vibration area pressing plate and are not input.

And step S302, when the condition of preferentially penetrating through the vibration area is met, judging whether the AGC target value of the whole plant and the capacity of other AGC-input units meet the preset condition in real time, and when the preset condition is not met, automatically and synchronously reducing the load of the AGC-input units to the upper edge of the vibration area according to the scheduling given value through the AGC system.

Specifically, the preset conditions in this step are: the AGC target value of the whole plant is smaller than +20MW of the sum of the vibration areas of the input AGC units, and other input AGC capacities can be matched. And judging whether the AGC target value of the whole plant and the capacity of other units put into the AGC meet respective corresponding conditions in real time through an AGC program, and if not, automatically and synchronously reducing the load put into the AGC unit to the upper edge of the vibration area by the AGC according to the scheduling given value. If so, the next step is entered.

And step S303, setting the AGC optimal value of the unit in the run-down vibration area to be equal to the run-down target value.

Specifically, after the condition of the unit preferential downward vibration area is met, the AGC optimization value of the unit of the downward vibration area needs to be set to be equal to the downward target value of the unit, namely po=pt.

Step S304, based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, the machine set with the preferential downward crossing vibration area automatically passes through the vibration area step by step through the AGC system according to the deviation of the real sending value of the machine set and the given value.

Specifically, the AGC automatically passes through the vibration area with a unit of 'preferential downward passing' vibration area, the active set value of the unit is issued step by step according to the set passing step length Ps, and load deviation generated by the passing process of the unit is matched one by other input AGC units. And when the single-step adjustment is within the in-place maximum time Ts, and the given and actual deviation of the unit in the downward-penetrating vibration region is smaller than a certain value of the single-step crossing step length Ps, continuing to deliver the next given value. If the single step is not adjusted in place within the maximum time TS, then a given value is issued once, the other AGC units are put into one-to-one matching, the power deviation exit mark and the single machine AGC maximum time Tm are still not adjusted in place, and the single machine AGC is exited.

And step S305, scheduling and optimizing according to the deviation in real time through the AGC system, and ending the preferential downward-threading flow when the actual value of the unit of the current downward-threading vibration region is smaller than or equal to the sum value of the downward-threading target value and the dead zone of the single machine.

Specifically, the AGC optimizes in real time according to the scheduling given value and the actual value deviation, the actual value of the unit in the downward-penetrating vibration area is smaller than or equal to the downward-penetrating target value and the single machine dead zone, the downward-penetrating is finished, and meanwhile, the operation flows of the priority downward-penetrating mark, the single machine AGC and the AGC controllability are exited.

And step S306, after the preferential underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

Specifically, after the completion of the pull-down, the unit waits with the pull-down target value Pt, and whether the machine is stopped or the load is adjusted later is manually operated by an operator.

In this embodiment, when the unit performs preferential downward wearing, the other units are prohibited from automatically upward wearing the vibration area to perform matching.

In order to more clearly illustrate a specific implementation process of the instant-passing through vibration area working mode in the execution of the present application, an exemplary description is provided below of an execution method of the instant-passing through vibration area working mode in the embodiment of the present application.

Fig. 4 is a flowchart of a method for executing an immediate downward vibration region operation mode according to an embodiment of the present application, as shown in fig. 4, the method includes the following steps:

and S401, when the machine needs to be stopped, judging whether the condition of immediately passing through the vibration area is met or not by combining the AGC input state and the unit state.

Specifically, when the machine unit is judged to be shut down according to the load curve or the machine unit is shut down due to fault processing and other reasons, an operator can manually put in the mark of 'instant threading'. The conditions for the immediate underpass vibration region are: the marking conditions of judging whether the whole plant AGC is put into operation, the unit power generation state, the unit AGC is put into operation and all the unit penetrating vibration area pressing plates are not put into operation or not, namely judging whether the whole plant AGC is put into operation or not, wherein the whole plant AGC is put into operation, the unit power generation state, the unit AGC is put into operation and all the unit penetrating vibration area pressing plates are not put into operation or not, and all the above conditions are met.

And step S402, when the condition of penetrating through the vibration area immediately is met, judging whether the AGC target value of the whole plant and the capacity of other units which are put into the AGC meet the preset condition in real time, and under the condition that the preset condition is not met, carrying out normal load distribution according to the scheduling given value through the AGC system.

Specifically, the preset conditions in this step are: the AGC target value of the whole plant is smaller than the maximum chargeable load of other AGC units, and the capacities of other AGC units can be matched. And judging whether the AGC target value of the whole plant is smaller than the maximum chargeable load of other input AGC units or not through AGC in real time, and judging whether other input AGC capacities can be matched or not. If not, the AGC performs normal load distribution according to the scheduling given value. If so, the next step is entered.

And S403, setting the AGC optimal value of the unit in the run-down vibration area to be equal to the run-down target value.

Specifically, after the condition of the downward-penetrating vibration region is met, the AGC optimization value of the downward-penetrating vibration region unit needs to be set to be equal to the downward-penetrating target value of the unit, namely po=pt.

Step S404, based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, the machine set with the immediate downward crossing vibration area automatically passes through the vibration area step by step through the AGC system according to the deviation of the real sending value of the machine set and the given value.

Specifically, the AGC automatically passes through the vibration area with the unit passing through the vibration area instantly, the active set value of the unit is issued step by step according to the set passing step length Ps, and the load deviation generated by the passing process under the unit is matched one by other input AGC units. And when the single-step adjustment is within the in-place maximum time Ts, and the given and actual deviation of the unit in the downward-penetrating vibration region is smaller than a certain value of the single-step crossing step length Ps, continuing to deliver the next given value. If the single step is not adjusted in place within the maximum time TS, then a given value is issued once, the other AGC units are put into one-to-one matching, the power deviation exit mark and the single machine AGC maximum time Tm are still not adjusted in place, and the single machine AGC is exited.

And step 405, performing scheduling optimization according to the deviation in real time through the AGC system, and ending the instant downward flow when the actual value of the unit of the current downward vibration region is smaller than or equal to the sum of the downward target value and the dead zone of the single machine.

Specifically, the AGC optimizes in real time according to the scheduling given value and the actual value deviation, the actual value of the unit in the downward-penetrating vibration area is smaller than or equal to the downward-penetrating target value and the single machine dead zone, the downward-penetrating is finished, and meanwhile, the control flow of the priority downward-penetrating mark, the single machine AGC and the AGC controllability is exited.

Step S406, after the instant underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

Specifically, after the instant underpass is completed, the underpass unit is provided with the underpass target value Pt for waiting, and whether the subsequent shutdown is needed or not is manually operated by an operator.

It should be noted that, in this embodiment, the control of the current unit allows the unit to automatically go up through the vibration area to perform matching only when the "instant-down" flag is turned on. When the machine set rotation is needed, a lower penetrating machine set is put into a mark of 'instant lower penetrating' and the other machine set is started and connected into an AGC group, when the AGC target value of the whole plant is smaller than the maximum load of the other input AGC machine sets, the machine sets start to rotate, and the lower penetrating machine set and the upper penetrating machine set are adjusted in a one-to-one matching mode.

Therefore, the method and the device make full use of the characteristics of the AGC optimized value, bring the AGC optimized value into the unit single AGC and the AGC controllable uplink scheduling comprehensive operation. The method can solve the contradiction that the AGC unit is not put into operation in the vibration area because of the strategy configuration of the dispatching side, and the AGC belt unit passes through the vibration area and needs the AGC unit to be kept in the put-in state. And the deviation between a dispatching given value and a load curve value is avoided, and the unit is ensured to normally pass through the vibration area. And the machine set downward-penetrating vibration area is provided with a preferential downward-penetrating mode and an immediate downward-penetrating mode, so that operators can select the machine set downward-penetrating vibration area according to the needs, and the requirements of daily operation and emergency treatment are met. The embodiment of the application also sets perfect locking conditions, the AGC passes through the vibration area to fully consider the limitation of the water head on the unit load and whether the capacities of other units are matched, and other conditions only allow one unit to pass through the vibration area except for immediate lower threading and automatic upper threading which can be matched up and down, so that the load of the whole plant is prevented from generating larger fluctuation.

In order to more clearly illustrate the beneficial effects of the method for quickly crossing the vibration area by the unit based on the AGC system regulation of the hydropower station, in one embodiment of the application, the method is applied to a specific hydropower station for verification. Taking a test result of a No. 3 unit of a large-scale cascade hydropower station as an example, the time for a manual unit to pass through a vibration area is about 3 minutes and 40 seconds, and the number of vibration alarm reporting times reaches more than 40 times. After the AGC of the application automatically passes through the vibration area, the time of the vibration area of the belt unit is shortened to about 1 minute and 10 seconds, the vibration alarm reporting times are shortened to 4 times, and the running condition of the unit is obviously improved.

In summary, according to the method for quickly crossing the vibration area by the unit based on the hydropower station AGC system regulation and control, the single unit AGC and AGC controllable state in the station and the single unit AGC and AGC controllable state in the dispatch are calculated respectively, so that the dispatch given value is ensured not to deviate from the load curve, and the unit in the station normally crosses the vibration area. Moreover, the method can put the machine set into the AGC group after the machine set is started and connected in advance, and the machine set can be kept waiting at the upper through base value when the automatic crossing condition is not met, and the vibration area can be automatically, quickly and stably penetrated when the condition is met. According to the method, the downward-penetrating vibration is divided into two modes of preferential downward-penetrating and immediate downward-penetrating, and corresponding downward-penetrating marks can be selected and input according to actual operation requirements, so that the requirements of various aspects of daily operation and emergency treatment are met. The method can realize the rapid and stable automatic AGC with the unit crossing of the vibration area, and obviously reduce the vibration and the swing degree out-of-limit alarm of the unit in the crossing process. Moreover, the method can realize one-to-one matching of the unit immediate downward penetrating vibration area and the automatic upward penetrating vibration area, thereby facilitating unit rotation and accident emergency treatment.

In order to achieve the embodiment, the application further provides a device for a unit to quickly pass through a vibration area based on the regulation and control of the hydropower station AGC system. The device can be arranged in control equipment of a centralized control center of the hydropower station, or an electronic device is arranged in the control center for the device, so that the unit can quickly pass through the vibration area. Fig. 5 is a schematic structural diagram of a device for a unit to quickly pass through a vibration area based on AGC system regulation of a hydropower station according to an embodiment of the present application.

As shown in fig. 5, the apparatus includes a first setting module 100, a dividing module 200, a determining module 300, a second setting module 400, a detecting module 500, and an executing module 600.

The first setting module 100 is configured to set a matching relationship between a water head in the AGC system and a chargeable maximum load of the unit according to a comprehensive characteristic curve of the water turbine and a unit operation condition.

The dividing module 200 is used for dividing a vibration area and an operable area of the single vibration area hydroelectric generating set.

The determining module 300 is configured to set a target value of the downward-penetrating vibration region, and re-determine the operable region of the unit by combining the target value of the downward-penetrating vibration region, the upper threshold value of the vibration region, and the maximum load that the unit can carry.

And the second setting module 400 is configured to determine an AGC optimization value according to the pull-down target value and the upper limit threshold of the vibration area, and set an AGC controllable uplink scheduling policy corresponding to the unit single AGC based on the AGC optimization value.

The detection module 500 is configured to set a single step crossing step length and a single step adjustment in-place determination time, and detect whether the real sending value of the unit tracks a given value by combining the single step crossing step length, the single step adjustment in-place determination time and the single machine AGC maximum time.

The execution module 600 is configured to set three working modes of an automatic upward-penetrating vibration area, an immediate downward-penetrating vibration area and a preferential downward-penetrating vibration area, and execute corresponding working modes according to the actual running condition of the unit based on the set parameters.

Optionally, in one embodiment of the present application, the first setting module 100 is specifically configured to: and defining the number of data of the maximum output corresponding to the water head in a configuration file of matching the water head and the load of the AGC program, and configuring the corresponding relation between any water head and the maximum load of the unit.

Optionally, in one embodiment of the present application, the partitioning module 200 is specifically configured to: determining a vibration area of the hydroelectric generating set according to a stability test result of the hydroelectric generating set in a full water head range, and setting the vibration area range in operation parameters of an AGC system; the operable zone is automatically calculated from the head and vibration zone by an AGC program.

Optionally, in one embodiment of the present application, the determining module 300 is specifically configured to: setting a corresponding downward-penetrating target value according to the reverse power of the unit in the downward-penetrating vibration area process of the unit, and taking the downward-penetrating target value as an automatic upward-penetrating base load waiting value of the unit; the operational area of the unit is redetermined by the following formula:

Por＝[0，Pt]，

Por＝[Pv，Pm]

Optionally, in an embodiment of the present application, the second setting module 400 is specifically configured to: setting an AGC optimization judgment threshold value of a unit; under the condition that the single machine AGC is put in and the AGC optimized value is larger than the AGC optimized judgment threshold, setting the single machine AGC state of the uplink scheduling to be 1; under the condition that the single machine AGC is controllable and the AGC optimized value is larger than the AGC optimized judgment threshold, setting the single machine AGC controllable state of the uplink scheduling to be 1; setting the uplink scheduling single machine AGC state to 0 under the condition that the single machine AGC is put in and the AGC optimized value is smaller than the AGC optimized judgment threshold value; when the single machine AGC exits, the state of the single machine AGC for up-sending scheduling is set to 0; setting the uplink scheduling single machine AGC controllable state to 0 under the condition that the single machine AGC is controllable and the AGC optimized value is smaller than the AGC optimized judgment threshold; when the single machine AGC is not controllable, the controllable state of the single machine AGC for uplink scheduling is set to 0.

Optionally, in one embodiment of the present application, the detection module 500 is specifically configured to: when the unit real sending value and the given value are within the single-step adjustment in-place judging time and the deviation is continuously larger than the single-step traversing step length multiplied by the preset coefficient, the given value of the next step is issued through the AGC system; and under the condition that the single-step adjustment in-place judging time is exceeded and the single-machine AGC maximum time is reached, and the deviation is continuously larger than the single-step crossing step length multiplied by a preset coefficient, exiting the flow of automatically crossing the vibration area and the single-machine AGC, and checking the abnormal reason.

Optionally, in one embodiment of the present application, the execution module 600 is specifically configured to: judging whether the machine needs to be started or not according to the scheduling load curve, and normally distributing the load to each unit which is put into AGC according to a load distribution principle through an AGC system under the condition that the machine needs to be started; after the machine set is started and connected, reactive power of the machine set is set to be 0, whether the machine set normally runs with basic load is checked, residual load is distributed through an AGC system, and after the fact that active regulation enabling of the machine set is put into normal operation is determined, the machine set is put into AGC; when the condition of automatically passing through the vibration area is met, setting the AGC optimal value of the unit in the vibration area to be equal to the waiting value of the unit passing through the base load; judging whether the process of passing through the vibration area on the whole plant AGC target value and the unit meets the corresponding preset conditions in real time, and under the condition that the preset conditions are not met, redistributing the residual load to ensure that the whole plant load real-time sending value tracks the scheduling given value; based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, the AGC system automatically drives the machine set with the vibration zone to gradually cross the vibration zone according to the deviation between the actual sending value and the given value of the machine set; scheduling optimization is carried out in real time according to the deviation through the AGC system, and after the load adjustment of the current machine set penetrating through the vibration area is consistent with that of other machine sets which are input into the AGC, the automatic penetrating flow is ended.

Optionally, in an embodiment of the present application, the execution module 600 is further configured to: judging whether the unit can fall into a vibration area to operate according to the scheduling load curve, and judging whether the condition of preferentially penetrating through the vibration area is met according to the AGC input state and the unit state under the condition that the unit falls into the vibration area to operate; when the condition of preferentially penetrating through the vibration area is met, judging whether the AGC target value of the whole plant and the capacity of other AGC-input units meet preset conditions in real time, and automatically and synchronously reducing the load input into the AGC units to the upper edge of the vibration area according to the scheduling given value by the AGC system under the condition that the preset conditions are not met; setting the AGC optimal value of the unit in the downward-penetrating vibration area to be equal to the downward-penetrating target value; based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, the AGC system automatically and preferentially passes through the vibration area step by step according to the deviation between the actual sending value and the given value of the unit; scheduling and optimizing in real time according to the deviation through an AGC system, and ending the preferential downward-threading flow when the actual value of the unit of the current downward-threading vibration region is smaller than or equal to the sum value of the downward-threading target value and the dead zone of the single machine; and after the preferential underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

Optionally, in an embodiment of the present application, the execution module 600 is further configured to: when the machine is required to be stopped, judging whether the condition of penetrating through the vibration area immediately is met or not by combining the AGC input state and the unit state; when the condition of penetrating through the vibration area immediately is met, judging whether the AGC target value of the whole plant and the capacity of other units which are put into the AGC meet the preset condition in real time, and carrying out normal load distribution according to the scheduling given value through the AGC system under the condition that the preset condition is not met; setting the AGC optimal value of the unit in the downward-penetrating vibration area to be equal to the downward-penetrating target value; based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, the AGC system is used for automatically carrying out gradual crossing of the unit with the immediate downward crossing vibration area according to the deviation between the real sending value and the given value of the unit; scheduling and optimizing in real time according to the deviation through an AGC system, and ending the immediate downward-threading flow when the actual value of the unit of the current downward-threading vibration region is smaller than or equal to the sum value of the downward-threading target value and the dead zone of the single machine; and after the instant underpass is finished, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

It should be noted that, the foregoing description of the embodiments of the method for quickly passing through the vibration area by the unit based on the AGC system regulation of the hydropower station is also applicable to the device of this embodiment, and the implementation principle is the same, and will not be repeated here.

In summary, according to the device for quickly traversing the vibration area based on the unit regulated by the hydropower station AGC system, the in-station single machine AGC and the AGC controllable state and the dispatch single machine AGC and the AGC controllable state are calculated respectively, so that the dispatch given value is ensured not to deviate from the load curve, and the in-station unit normally traverses the vibration area. Moreover, the device can put the unit into the AGC group after being started and connected in advance, and the unit can be kept waiting at the upper through base value when the automatic crossing condition is not met, and can automatically, rapidly and stably pass through the vibration area when the condition is met. The device divides the downward vibration into two modes of preferential downward and immediate downward, and can selectively input the corresponding downward mark according to the actual operation requirement so as to meet the requirements of various aspects of daily operation and emergency treatment. The device can realize that AGC automatically takes the machine set to pass through the vibration area rapidly and stably, and obviously reduces the vibration and the swing degree out-of-limit alarm of the machine set in the passing process. Moreover, the device can also realize that the unit is one-to-one matched with the automatic upward-penetrating vibration area immediately after the downward-penetrating vibration area is cut, so that the unit rotation and the accident emergency treatment are convenient.

In order to achieve the above embodiments, the present invention further provides a non-transitory computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements a method for a unit based on AGC system regulation and control of a hydropower station according to the first aspect of the present application to quickly traverse a vibration area.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, if a schematic representation of the above terms is employed in a plurality of embodiments or examples, it is not intended that these embodiments or examples be identical. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. A method for a unit to quickly pass through a vibration area based on AGC system regulation and control of a hydropower station is characterized by comprising the following steps:

2. The method of claim 1, wherein the setting the matching relationship between the head of the AGC system and the maximum load that the unit can carry comprises:

and defining the number of data of the maximum output corresponding to the water head in a configuration file of matching the water head and the load of the AGC program, and configuring the corresponding relation between any water head and the maximum load of the unit.

3. The method of claim 1, wherein the dividing the vibration zone and the operational zone of the single vibration zone hydro-generator set comprises:

determining a vibration area of the hydroelectric generating set according to a stability test result of the hydroelectric generating set in a full water head range, and setting the vibration area range in the operation parameters of the AGC system;

the operable zone is automatically calculated from the head and vibration zone by an AGC program.

4. The method of claim 1, wherein setting a pull-down target value for a pull-down vibration region comprises:

setting a corresponding downward-penetrating target value according to the reverse power of the unit in the downward-penetrating vibration area process of the unit, and taking the downward-penetrating target value as an automatic upward-penetrating base load waiting value of the unit;

The operational area of the unit is redetermined by the following formula:

Por＝[0，Pt]，

Por＝[Pv，Pm]

5. The method of claim 1, wherein the setting the AGC controllable uplink scheduling policy corresponding to the unit AGC based on the AGC optimization value comprises:

setting an AGC optimization judgment threshold value of a unit;

setting the uplink scheduling single machine AGC state to be 1 under the condition that the single machine AGC is put in and the AGC optimized value is larger than the AGC optimized judgment threshold value;

under the condition that the single machine AGC is controllable and the AGC optimized value is larger than the AGC optimized judgment threshold, setting the single machine AGC controllable state of the uplink scheduling to be 1;

setting 0 for the single machine AGC state of the uplink scheduling under the condition that the single machine AGC is put in and the AGC optimized value is smaller than the AGC optimized judgment threshold; when the single machine AGC exits, setting the state of the single machine AGC of the up-sending scheduling to 0;

setting 0 for the single machine AGC controllable state of the uplink scheduling under the condition that the single machine AGC is controllable and the AGC optimized value is smaller than the AGC optimized judgment threshold; and setting the uplink scheduling single machine AGC controllable state to 0 when the single machine AGC is uncontrollable.

6. The method of claim 1, wherein said detecting whether the unit real estate value tracks a given value in combination with the single step crossing step size, the single step adjustment in place determination time, and the stand-alone AGC maximum time, comprises:

when the single step adjustment is in place and the deviation between the actual sending value of the unit and the given value is continuously larger than the single step crossing step length multiplied by a preset coefficient, the given value of the next step is sent out through the AGC system;

and under the condition that the single-step adjustment in-place judging time is exceeded and the single-machine AGC maximum time is reached, and the deviation is continuously larger than the single-step crossing step length multiplied by a preset coefficient, exiting the flow of automatically crossing the vibration area and the single-machine AGC, and checking the abnormal reason.

7. The method of claim 1, wherein performing an automatic up-through vibration zone mode of operation comprises:

judging whether the machine needs to be started or not according to a scheduling load curve, and normally distributing the load to each unit which is put into AGC according to a load distribution principle through the AGC system under the condition that the machine needs to be started;

after the machine set is started and connected, reactive power of the machine set is set to be 0, whether the machine set normally runs with basic load is checked, residual load is distributed through the AGC system, and after the fact that active regulation enabling of the machine set is put into normal is determined, the machine set is put into AGC;

When the condition of automatically passing through the vibration area is met, setting the AGC optimal value of the unit in the vibration area to be equal to the waiting value of the unit passing through the base load;

judging whether the process of passing through the vibration area on the whole plant AGC target value and the unit meets corresponding preset conditions in real time, and under the condition that the preset conditions are not met, redistributing residual load to ensure that the whole plant load actual sending value tracks the scheduling given value;

based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, a machine set with a crossing vibration area automatically passes through the vibration area step by step through the AGC system according to the deviation of a machine set actual sending value and a given value;

and scheduling and optimizing according to the deviation in real time through the AGC system, and ending the automatic threading flow after the load adjustment of the current threading vibration area unit is consistent with that of other units which are put into AGC.

8. The method of claim 1, wherein performing a preferential drop-through vibration zone mode of operation comprises:

judging whether the unit can fall into a vibration area to operate according to the scheduling load curve, and judging whether the condition of preferentially penetrating through the vibration area is met according to the AGC input state and the unit state under the condition that the unit falls into the vibration area to operate;

When the condition that the vibration area is penetrated downwards preferentially is met, judging whether the AGC target value of the whole plant and the capacity of other AGC-input units meet preset conditions in real time, and automatically and synchronously reducing the load of the AGC units to the upper edge of the vibration area according to a scheduling given value by an AGC system under the condition that the preset conditions are not met;

setting the AGC optimal value of the unit in the downward-penetrating vibration area to be equal to the downward-penetrating target value;

based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, a machine set which automatically takes priority to pass through a vibration area gradually crosses the vibration area through the AGC system according to the deviation between the actual sending value and the given value of the machine set;

scheduling and optimizing according to the deviation in real time through the AGC system, and ending the preferential downward-threading flow when the actual value of the unit of the current downward-threading vibration region is smaller than or equal to the sum value of the downward-threading target value and the dead zone of the single machine;

and after the preferential underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

9. The method of claim 1, wherein performing a transient pull-down vibration region mode of operation comprises:

when the machine is required to be stopped, judging whether the condition of penetrating through the vibration area immediately is met or not by combining the AGC input state and the unit state;

When the condition of instantly penetrating through the vibration area is met, judging whether the AGC target value of the whole plant and the capacity of other units put into AGC meet preset conditions in real time, and carrying out normal load distribution according to a scheduling given value through an AGC system under the condition that the preset conditions are not met;

based on the single-step crossing step length, the single-step adjustment in-place judging time and the single-machine AGC maximum time, a machine unit automatically and instantly penetrating through a vibration area gradually crosses the vibration area through the AGC system according to the deviation between the actual sending value and the given value of the machine unit;

scheduling and optimizing according to the deviation in real time through the AGC system, and ending the immediate downward flow when the actual value of the unit in the current downward vibration area is smaller than or equal to the sum of the downward target value and the dead zone of the single machine;

and after the instant underpass is completed, controlling the unit of the current underpass vibration area to carry the underpass target value to wait for subsequent operation.

10. The utility model provides a device that unit passed through vibration district fast based on regulation and control of power station AGC system which characterized in that includes: