AGC mode automatic switching method and system based on linkage of plant station monitoring and dispatching command system

Abstract

The invention discloses an AGC mode automatic switching method and system based on plant station monitoring and dispatching command system linkage, and the method comprises the steps: obtaining a power station plan load curve issued by a power grid dispatching command system when an AGC command is switched from a first command to a second command, and calculating the plan load value of each time point of a preset step length through an interpolation method; judging the plan load value, judging whether the plan load value of the power station changes within T minutes or not, if yes, switching the plant-level AGC working mode of the power station from the first working mode to the second working mode after the first judgment logic, and when the AGC command is switched from the second command to the third command, switching the second command to the third command. And the power station plant-level AGC working mode is switched from the second working mode to the first working mode after passing through the second judgment logic. After interconnection and intercommunication of the power station computer monitoring and dispatching command control system are achieved, automatic application, automatic switching and automatic command returning can be achieved in the AGC mode switching process, and the working efficiency of watchmen is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of AGC mode switching, and in particular to an AGC mode automatic switching method and system based on plant monitoring and dispatching command system linkage. Background Art

[0002] In the power industry, AGC refers to Automatic Generation Control, which is one of the paid auxiliary services provided by grid-connected power plants. AGC can control the generator set within the specified output adjustment range, track the instructions issued by the power dispatching and trading agency, and adjust the power output in real time according to a certain adjustment rate to meet the power system frequency and tie line power control requirements.

[0003] There are generally two ways for the superior power dispatching organization in the power system to communicate with the power station: recorded telephone communication or dispatching command and control system.

[0004] The two parties in the recorded telephone communication first need to exchange their units and names, then verbally state the dispatch order, repeat the dispatch order, and finally issue an order to execute it. For short dispatch orders such as AGC switching mode, recorded telephone communication has the problem of low efficiency due to the need for oral repetition. In addition, recorded telephone communication is not convenient for the recipient to record the content of the dispatch order. The voice volume and pitch of the two parties in communication are different, which may lead to miscommunication and cause erroneous operation.

[0005] The dispatching command and control system is a dispatching terminal and a command receiving terminal developed based on the C / S architecture and private communication protocol. The dispatching terminal obtains real-time grid data from the power grid management system through the security zone I / II interface, and interconnects with the power station dispatching and operation business through the synchronization server of the security zone II / III. The command receiving terminal communicates with the superior power dispatching organization through the power dispatching data network and the vertical encryption authentication device. After the command receiving unit receives the dispatching command at the command receiving terminal of the dispatching command and control system, it executes the corresponding dispatching command on the computer monitoring system of the command receiving unit. In the process of executing the dispatching command, the computer monitoring system can only execute the manually entered operation commands, and cannot determine the one-to-one correspondence between the executed operation commands and the dispatching commands, which poses a risk of human error. The dispatching command and control system and the computer monitoring system of the command receiving unit cannot be interconnected, and the risk of human error cannot be technically avoided.

[0006] When it comes to equipment that needs to be adjusted by the superior dispatching organization, the equipment operation quality and time control requirements are extremely high. Once an error occurs, the consequences are extremely serious, affecting the safe and stable operation of the power grid. Since the AGC mode switching affects the power station's tracking of the planned load curve, the timeliness and accuracy requirements are high. Once the communication with the dispatcher is not timely and accurate, resulting in the inability to switch the AGC mode on time or the AGC mode is manually switched by mistake, it will cause the power station load deviation and affect the safe and stable operation of the power grid. Therefore, it is very necessary to improve the efficiency of AGC mode switching and realize the AGC automatic switching mode. Summary of the invention

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

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

[0009] Therefore, the present invention provides an automatic AGC mode switching method and system based on the linkage between plant monitoring and dispatching command system, which can solve the problems mentioned in the background technology.

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

[0011] In a first aspect, the present invention provides an automatic AGC mode switching method based on the linkage between plant monitoring and dispatching command system, comprising:

[0012] When the AGC command is switched from the first instruction to the second instruction, the planned load curve of the power station issued by the power grid dispatching command system is obtained, and the planned load value at each time point of the preset step length is calculated by using the interpolation method;

[0013] Determine whether the planned load value of the power station changes within T minutes. If there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode.

[0014] When the AGC command is switched from the second instruction to the third instruction, the power station-level AGC working mode is switched from the second working mode to the first working mode after the second judgment logic.

[0015] As a preferred scheme of the AGC mode automatic switching method based on the linkage of the plant monitoring and dispatching command system described in the present invention, it also includes: if the planned load value determines that the planned load value of the power station does not change within T minutes, the AGC command is switched from the second instruction to the first instruction.

[0016] As a preferred solution of the AGC mode automatic switching method based on the linkage between the plant monitoring and dispatching command system described in the present invention, the first judgment logic includes:

[0017] If the planned load value of the power station changes within T minutes, an application is initiated to switch the AGC mode from the first working mode to the second working mode;

[0018] After the application is initiated, the consent instruction of the power station duty officer and the permission instruction of the dispatching duty officer are obtained in turn;

[0019] If the power station operator's consent instruction or the dispatch operator's permission instruction is not obtained, after a specific delay of T1, an application is initiated again to switch the AGC mode from the first working mode to the second working mode;

[0020] If the power station operator's consent instruction or the dispatching operator's permission instruction is obtained, the AGC will be switched to "station dispatch".

[0021] As a preferred solution of the AGC mode automatic switching method based on the linkage between the plant monitoring and dispatching command system described in the present invention, the first judgment logic also includes:

[0022] After switching the AGC to "station adjustment", determine whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold P. If the difference between the two is greater than the active power threshold P, determine whether the AGC planned load value is less than the active power actual value.

[0023] If the AGC planned load value is less than the active power actual value, the AGC station adjustment setting value is adjusted down by P, and after a specific delay time T2, it is determined again whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P;

[0024] If the difference between the two is still greater than the active power threshold value P, the AGC station adjustment set value is increased by P. After a specific delay time T2, it is determined again whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P. The AGC station adjustment active power set value is adjusted cyclically until the difference between the AGC station planned load value and the active power actual value is less than or equal to the active power threshold value P.

[0025] When the difference between the two is less than or equal to the active power threshold P, the AGC is switched to the "load curve" to complete the switching from the first working mode to the second working mode.

[0026] As a preferred solution of the AGC mode automatic switching method based on the linkage between the plant monitoring and dispatching command system described in the present invention, the second judgment logic includes:

[0027] When the AGC command is switched from the second instruction to the third instruction, an application is initiated to switch the AGC mode from the second working mode to the first working mode;

[0028] After the application is initiated, the consent instruction of the power station duty officer and the permission instruction of the dispatching duty officer are obtained in turn;

[0029] If the power station operator's consent instruction or the dispatch operator's permission instruction is not obtained, after a specific delay of T1, an application is initiated again to switch the AGC mode from the second working mode to the first working mode;

[0030] If the power station operator's consent instruction or the dispatching operator's permission instruction is obtained, the AGC will be switched to "active power setting".

[0031] As a preferred solution of the AGC mode automatic switching method based on the linkage between the plant monitoring and dispatching command system of the present invention, the second judgment logic further includes:

[0032] After the AGC is switched to "active power setting", it is determined whether the difference between the AGC scheduling active power setting value and the active power actual value is less than or equal to the active power threshold value P. If the difference between the two is greater than the active power threshold value P, it is determined whether the AGC scheduling active power setting value is less than the active power actual value;

[0033] If the AGC dispatch active power setting value is less than the active power actual value, the AGC station adjustment setting value is reduced by P, and after a specific delay time T2, it is determined again whether the difference between the AGC dispatch active power setting value and the active power actual value is less than or equal to the active power threshold value P;

[0034] If the difference between the two is still greater than the active power threshold value P, the AGC station adjustment set value is increased by P. After a specific delay time T2, it is determined again whether the difference between the AGC dispatch active power set value and the active power actual value is less than or equal to the active power threshold value P. The AGC station adjustment active power set value is adjusted cyclically until the difference between the AGC dispatch active power set value and the active power actual value is less than or equal to the active power threshold value P.

[0035] When the difference between the two is less than or equal to the active power threshold P, the AGC is switched to "scheduling" to complete the switching from the second working mode to the first working mode.

[0036] As a preferred solution of the AGC mode automatic switching method based on the linkage of plant monitoring and dispatching command system described in the present invention, it also includes: when the AGC command type is the second instruction, the dispatcher no longer issues a new dispatching active power setting value, and the actual active power generation value of the power station tracks the last dispatching active power setting value issued.

[0037] In a second aspect, the present invention provides an AGC mode automatic switching system based on the linkage between plant monitoring and dispatching command system, comprising:

[0038] The load value calculation module is used to obtain the planned load curve of the power station issued by the power grid dispatching command system when the AGC command is switched from the first instruction to the second instruction, and calculate the planned load value at each time point of the preset step length by using the interpolation method;

[0039] The first switching module is used to determine whether the planned load value of the power station changes within T minutes. If there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode;

[0040] The second switching module is used for switching the power plant-level AGC working mode from the second working mode to the first working mode after the second judgment logic when the AGC command is switched from the second instruction to the third instruction.

[0041] In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method when executing the computer program.

[0042] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method described above when executed by a processor.

[0043] Compared with the prior art, the present invention has the following beneficial effects: the present invention proposes an automatic switching method and system for AGC mode based on the linkage between plant and station monitoring and dispatching and command systems. When the AGC command is switched from the first instruction to the second instruction, the planned load curve of the power station issued by the power grid dispatching and command system is obtained, and the planned load value at each time point of the preset step is calculated by the interpolation method; the planned load value is judged to determine whether the planned load value of the power station has changed within T minutes. If there is a change, the plant-level AGC working mode of the power station is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power given, dispatching, closed-loop" working mode, and the second working mode is the "load curve, station dispatching, closed-loop" working mode; when the AGC command is switched from the second instruction to the third instruction, the plant-level AGC working mode of the power station is switched from the second working mode to the first working mode after the second judgment logic. The power station computer monitoring system automatically switches the AGC mode, which can effectively avoid the risk of human error and improve the accuracy of AGC mode switching; the power station computer monitoring system initiates the AGC mode switching process according to the change of AGC command type, effectively avoiding the risk of missed application and missed switching, and ensuring the timeliness of AGC mode switching; the AGC mode switching process automatically initiates application and response, effectively avoiding the risk of wrong application, missed response and miscommunication; during the AGC mode switching process, when the AGC planned load value or the dispatching active power setting value deviates greatly from the actual active power value, the computer monitoring system can automatically adjust the station dispatch setting value accordingly to avoid large load fluctuations during the switching process and impact on the power grid system. After the power station computer monitoring and dispatching command and control system are interconnected, the AGC mode switching process can realize automatic application, automatic switching, and automatic response, which greatly improves the work efficiency of the duty officer. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0045] Figure 1 A method flow chart of an automatic AGC mode switching method and system based on plant monitoring and dispatching command system linkage provided by an embodiment of the present invention;

[0046] Figure 2 A first judgment logic flow chart of an AGC mode automatic switching method and system based on plant monitoring and dispatching command system linkage provided by an embodiment of the present invention;

[0047] Figure 3A second judgment logic diagram of an AGC mode automatic switching method and system based on plant monitoring and dispatching command system linkage provided by an embodiment of the present invention;

[0048] Figure 4 An internal structural diagram of a computer device of an AGC mode automatic switching method and system based on plant monitoring and dispatching command system linkage provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0050] Example 1

[0051] Reference Figure 1-Figure 4 , is the first embodiment of the present invention, which provides an AGC mode automatic switching method and system based on the linkage between the plant monitoring and the dispatching command system, including an AGC mode automatic switching method based on the linkage between the plant monitoring and the dispatching command system and an AGC mode automatic switching system based on the linkage between the plant monitoring and the dispatching command system, wherein the AGC mode automatic switching method based on the linkage between the plant monitoring and the dispatching command system includes:

[0052] Before describing the embodiments of the present application in detail, some related concepts are first explained for the sake of clarity.

[0053] "Active power given, dispatching, closed loop": Active power given: refers to setting the target value of active power output by the power station. The "given" here refers to the target value given by the power grid dispatching center or the power station operator. Dispatching: refers to the power grid dispatching center. The dispatching center will dynamically adjust the power generation plan of each power station according to the changes in demand of the entire power grid. Closed loop: In control theory, a closed-loop control system means that the system will self-regulate based on actual output feedback. In this scenario, the power station will continuously monitor the active power it actually emits and adjust it based on the deviation from the target value to ensure that the output is stable near the target value.

[0054] "Load curve, station adjustment, closed loop": Load curve: usually refers to the time-varying electricity demand curve, which describes the expected electricity demand at different time periods in a day. The load curve is issued to the power station by the grid dispatching center the day before. In this mode, the power station will adjust its power generation according to the pre-planned load curve. Station adjustment: refers to the adjustment mechanism within the power station, that is, the power station adjusts its power generation according to the load curve or the manual settings of the power station operator, rather than directly responding to the instructions of the dispatching center. Closed loop: also refers to the system adjusting according to the difference between the actual output and the target value to ensure that the output remains within the desired range.

[0055] Interpolation: is a mathematical method used to estimate unknown values ​​between known data points. In this scenario, interpolation is used to calculate the planned load value of the power plant between two known time points (such as two points on the planned load curve provided by the power grid dispatching and command system). Common interpolation methods include linear interpolation, polynomial interpolation, etc. For example, if the planned load curve is 100MW at 8:00 and 120MW at 9:00, then linear interpolation can be used to calculate the planned load value at 8:30.

[0056] In related technologies, the switching of AGC (automatic generation control) modes often relies on manual judgment and operation, which not only increases the risk of misoperation, but may also affect the stable operation of the power grid due to untimely response.

[0057] The present application provides a method that can effectively solve the above-mentioned problems. Next, multiple embodiments will be combined to explain in detail how to implement the automatic switching method of the AGC mode based on the linkage between the plant monitoring and the dispatching command system;

[0058] Figure 1 A method flow chart of an automatic AGC mode switching method and system based on plant monitoring and dispatching command system linkage is shown, including:

[0059] S101, when the AGC command is switched from the first instruction to the second instruction, the planned load curve of the power station issued by the power grid dispatching command system is obtained, and the planned load value at each time point of the preset step length is calculated by interpolation method;

[0060] In the embodiment of the present application, the first instruction is "SCHEO" or "SCHEA", the second instruction is "MANU", and the third instruction is "WAIT";

[0061] It should be noted that in MANU: current mode, the power station load value is controlled by the power station itself according to the planned load curve, and the dispatcher no longer issues a new dispatch active power set value. If the planned load value changes within a short period of time T minutes, the AGC needs to be switched to "load curve, station dispatch, closed loop".

[0062] SCHEO: In the current mode, the dispatch is based on the base load value of the power station under the planned load curve value.

[0063] SCHEA: In the current mode, the dispatcher determines the basic load value of the power station according to the planned load curve value, but the power station needs to bear a certain amount of load adjustment in the secondary emergency area. That is, the dispatching active power setting value issued by the dispatcher may deviate from the planned load curve to a certain extent, generally not exceeding 200MW.

[0064] WAIT: AGC is in this mode in the "load curve, station regulation, closed loop" mode. The power plant-level AGC sends the load according to the planned load curve value.

[0065] In the embodiment of the present application, when the power plant-level AGC works in the "active power given, dispatching, closed loop" mode, the AGC command type is switched from "SCHEO" or "SCHEA" to "MANU", and the power plant computer monitoring system receives the power plant planned load curve issued by the power grid dispatching command system, wherein the planned load curve is composed of the planned load values ​​at each time point with a step length of 15 minutes. In the AGC mode automatic switching method, after the power plant computer monitoring system receives the power plant planned load curve issued by the power grid dispatching command system, it uses the interpolation method to calculate the planned load values ​​at each time point with a step length of 1 minute. The preset step length here is 1 minute, and relevant technical personnel can adjust it according to actual conditions to better meet the needs of power grid dispatching.

[0066] For example, suppose you receive a planned load curve with a data point every 15 minutes, as shown below:

[0067]

[0068] Now we need to use the interpolation method to calculate the planned load value at each time point with a step length of 1 minute. In this application, a simple linear interpolation method is used to estimate the load value at each time point between 8:00 and 8:15.

[0069] The linear interpolation formula is as follows:

[0070]

[0071] Where y is the value to be estimated. x is the time of the unknown point that you want to know. x1,y1 and x2,y2 are two known adjacent data points. Suppose you want to calculate the planned load value at 8:05, and the known data points are (08:00, 100) and (08:15, 120).

[0072] x1=08:00,y1=100

[0073] x2=08:15,y2=120

[0074] x=08:05

[0075] Substituting these values ​​into the formula:

[0076]

[0077] y=100+6.67

[0078] y≈106.67

[0079] Therefore, the planned load value at 8:05 is approximately 106.67MW. The same method can be applied to each time point between 8:01 and 8:14, and so on, until the entire planned load curve is refined to one data point per minute.

[0080] It should be noted that other improved types of difference methods can also be used to obtain corresponding data, but they should all be within the scope of protection of our design ideas;

[0081] In an optional embodiment, in addition to using the interpolation method, the planned load curve can also be solved by using the approximation method, spline interpolation method, exponential smoothing method, moving average method and other methods, and relevant technical personnel can select according to specific needs.

[0082] It should be noted that S101 ensures that when the AGC mode is switched, the power station computer monitoring system can obtain sufficiently detailed planned load curve data, so as to more accurately control the load output of the power station. This refined data not only reduces the risk of misoperation caused by inaccurate data, but also improves the efficiency and accuracy of power grid dispatching, further ensuring the stable operation of the power grid.

[0083] S102, judging whether the planned load value of the power station changes within T minutes, if there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic, the first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode;

[0084] In the embodiment of the present application, if the planned load value determines that the planned load value of the power station does not change within T minutes, the AGC command is switched from the second instruction to the first instruction.

[0085] Specifically, the first judgment logic includes:

[0086] If the planned load value of the power station changes within T minutes, an application is initiated to switch the AGC mode from the first working mode to the second working mode;

[0087] Furthermore, after the application is initiated, the consent instruction of the power station duty officer and the permission instruction of the dispatching duty officer are obtained in sequence;

[0088] Furthermore, if the consent instruction of the power station operator or the permission instruction of the dispatching operator is not obtained, after a delay of a specific time length T1, an application for switching the AGC mode from the first working mode to the second working mode is initiated again;

[0089] Furthermore, if the power station operator's consent instruction or the dispatching operator's permission instruction is obtained, the AGC will be switched to "station dispatch".

[0090] Furthermore, after the AGC is switched to "station adjustment", it is determined whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P. If the difference between the two is greater than the active power threshold value P, it is necessary to determine whether the AGC planned load value is less than the active power actual value;

[0091] Furthermore, if the AGC planned load value is less than the active power actual value, the AGC station adjustment setting value is reduced by P, and after a specific delay time T2, it is determined again whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P;

[0092] Furthermore, if the difference between the two is still greater than the active power threshold value P, the AGC station adjustment set value is increased by P, and after a specific delay time T2, it is determined again whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P, and the AGC station adjustment active power set value is adjusted cyclically until the difference between the AGC station planned load value and the active power actual value is less than or equal to the active power threshold value P;

[0093] Furthermore, when the difference between the two is less than or equal to the active power threshold P, the AGC is switched to the "load curve" to complete the switching from the first working mode to the second working mode.

[0094] like Figure 2 As shown, it is a first judgment logic flow chart in the embodiment of the present application, and the specific process steps are as follows:

[0095] Step 1: The power plant-level AGC works in the "active power setting, dispatching, closed loop" mode, and the AGC command type is switched from "SCHEO" or "SCHEA" to "MANU", and then proceed to step 2.

[0096] Step 2: The computer monitoring system uses the interpolation method to calculate the planned load value of the load curve every minute and enters step 3.

[0097] Step 3: Determine whether the planned load value of the power station changes within T minutes. If not, proceed to step 4; if yes, proceed to step 6.

[0098] Step 4: Notify the dispatcher that the power plant-level AGC command type is "MANU" and proceed to step 5.

[0099] Step 5: The dispatcher switches the power plant-level AGC command type to "SCHEO" or "SCHEA".

[0100] Step 6: The computer monitoring system automatically initiates the AGC mode switch to "load curve, station adjustment, closed loop" application and proceeds to step 7.

[0101] Step 7: Determine whether the power station operator's consent instruction has been received. If not, proceed to step 9. If yes, proceed to step 8.

[0102] Step 8: Determine whether the dispatcher's permission instruction has been received. If not, proceed to step 9; if yes, proceed to step 10.

[0103] Step 9: Extend the specific time T1 and proceed to step 6.

[0104] Step 10: The computer monitoring system automatically switches the AGC to "station adjustment" and proceeds to step 11.

[0105] Step 11: Determine whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P. If not, proceed to step 12; if yes, proceed to step 16.

[0106] Step 12: Determine whether the AGC planned load value is less than the active power actual value, if not, proceed to step 13, if yes, proceed to step 15.

[0107] Step 13: The computer monitoring system automatically increases the AGC station setting value by P and proceeds to step 14.

[0108] Step 14: Delay for a specific time period T2 and proceed to step 11.

[0109] Step 15: The computer monitoring system automatically adjusts the AGC station setting value to a smaller value P and goes to step 14.

[0110] Step 16: The computer monitoring system automatically switches the AGC to the "load curve" and proceeds to step 17.

[0111] Step 17: The computer monitoring system automatically returns the order for dispatching: the AGC mode is switched to "load curve, station adjustment, closed loop" and the execution is completed.

[0112] In an embodiment of the present application, after the dispatching command and control system is interconnected with the computer monitoring system of the ordered unit, the power station operator can confirm and agree to the AGC mode switching application operation on the power station computer monitoring system, and the dispatching operator can complete the AGC mode switching permission operation on the dispatching command and control system.

[0113] In the embodiment of the present application, in the AGC mode switching process, if the power station operator does not choose to agree or not for the AGC mode switching application when the timeout period arrives, or the dispatching operator does not choose to permit or not when the timeout period arrives, the monitoring system will issue a voice reminder.

[0114] In an embodiment of the present application, when the AGC mode is set under a load curve, station adjustment or dispatching mode, the actual active power generation value of the power station tracks the active power setting value under the corresponding mode.

[0115] In the embodiment of the present application, when the AGC command type is MANU, the dispatcher will no longer issue a new dispatch active power setting value, and the actual active power value of the power station will track the last dispatch active power setting value issued. If the planned load value does not change within a short time T minutes at this time, there is no need to switch the AGC mode to "load curve, station dispatch, closed loop", and the actual active power value of the power station will not deviate significantly from the planned load value. For example, the time T can be set to 15 minutes.

[0116] In the embodiment of the present application, in the AGC mode switching process, if the power station operator disagrees to initiate the application or the dispatch operator does not approve the application, the application will be re-initiated after a specific delay time T1. For example, the specific time T1 can be set to 5 minutes.

[0117] In the embodiment of the present application, in order to avoid large load fluctuations and impact on the power grid system during the AGC mode switching process, when the difference between the AGC planned load value and the active power value is greater than the active power threshold P, the AGC "active power setting" and "load curve" cannot be switched; when the difference between the AGC dispatch active power setting value and the active power value is greater than the active power threshold P, the AGC "dispatching" and "station dispatching" cannot be switched. For example, the active power threshold P can be set to 30MW.

[0118] In an embodiment of the present application, during the AGC mode switching process, the deviation between the AGC planned load value or the dispatching active power setting value and the actual active power value may be large. At this time, the monitoring system needs to adjust the station adjustment setting value accordingly before switching the AGC to the corresponding mode.

[0119] In the embodiment of the present application, after the AGC station adjustment setting value is adjusted, it takes a certain time for the actual active power value of the power station to be adjusted to the vicinity of the station adjustment setting value, so the deviation between the AGC planned load value or the scheduling active power setting value and the actual active power value is compared after a specific delay T2. For example, the specific time length T2 can be set to 10s.

[0120] It should be noted that step S102 can respond to load fluctuations in a timely manner by real-time monitoring of changes in the planned load value of the power station within T minutes, ensuring that the load output of the power station is synchronized with the power grid dispatching requirements. This fast response mechanism not only improves the flexibility of power grid dispatching, but also effectively reduces the operating risks caused by load changes. By introducing the confirmation mechanism of the power station operator and the dispatching operator, the compliance and safety of the AGC mode switching are ensured. This double confirmation method effectively avoids the possibility of misoperation and ensures the stable operation of the power grid. The deviation between the AGC planned load value and the active power actual value is gradually reduced by cyclically adjusting the active power setting value of the AGC station until the preset active power threshold P is reached. This refined adjustment method not only improves the accuracy of load control, but also effectively avoids the impact of large load fluctuations on the power grid system. The processing strategy under special circumstances is also considered. For example, if the power station operator or the dispatching operator fails to respond to the mode switching application timeout, the monitoring system will issue a voice reminder to ensure that the relevant personnel can respond and handle it in time. This humanized design effectively improves the reliability and safety of power grid dispatching.

[0121] S103, when the AGC command is switched from the second instruction to the third instruction, the power station-level AGC working mode is switched from the second working mode to the first working mode after the second judgment logic.

[0122] In the embodiment of the present application, the second judgment logic includes: when the AGC command is switched from the second instruction to the third instruction, initiating an application for switching the AGC mode from the second working mode to the first working mode;

[0123] Furthermore, after the application is initiated, the consent instruction of the power station duty officer and the permission instruction of the dispatching duty officer are obtained in sequence;

[0124] Furthermore, if the consent instruction of the power station operator or the permission instruction of the dispatching operator is not obtained, after a delay of a specific time length T1, an application for switching the AGC mode from the second working mode to the first working mode is initiated again;

[0125] Furthermore, if the power station operator's consent instruction or the dispatching operator's permission instruction is obtained, the AGC is switched to "active power setting".

[0126] Furthermore, after the AGC is switched to "active power setting", it is determined whether the difference between the AGC scheduling active power setting value and the active power actual value is less than or equal to the active power threshold value P. If the difference between the two is greater than the active power threshold value P, it is determined whether the AGC scheduling active power setting value is less than the active power actual value;

[0127] Furthermore, if the AGC dispatch active power setting value is less than the active power actual value, the AGC station adjustment setting value is reduced by P, and after a specific delay time T2, it is determined again whether the difference between the AGC dispatch active power setting value and the active power actual value is less than or equal to the active power threshold value P;

[0128] Furthermore, if the difference between the two is still greater than the active power threshold value P, the AGC station adjustment set value is increased by P, and after a specific delay time T2, it is determined again whether the difference between the AGC dispatch active power set value and the active power actual value is less than or equal to the active power threshold value P, and the AGC station adjustment active power set value is adjusted cyclically until the difference between the AGC dispatch active power set value and the active power actual value is less than or equal to the active power threshold value P;

[0129] Furthermore, when the difference between the two is less than or equal to the active power threshold P, the AGC is switched to "scheduling" to complete the switching from the second working mode to the first working mode.

[0130] like Figure 3 As shown, it is a second judgment logic flow chart in the embodiment of the present application, and the specific process steps are as follows:

[0131] Step 1: The power plant-level AGC works in the "load curve, station adjustment, closed loop" mode, and the AGC command type is switched from "MANU" to "WAIT", and then proceed to step 2.

[0132] Step 2: The computer monitoring system automatically initiates an application to switch the AGC mode to "active power setting, dispatching, closed loop" and proceeds to step 3.

[0133] Step 3: Determine whether the power station operator's consent instruction has been received. If not, proceed to step 5. If yes, proceed to step 4.

[0134] Step 4: Determine whether the dispatcher's permission instruction has been received. If not, proceed to step 5. If yes, proceed to step 6.

[0135] Step 5: Extend the specific time T1 and proceed to step 2.

[0136] Step 6: The computer monitoring system automatically switches the AGC to "active power setting" and goes to step 7.

[0137] Step 7: Determine whether the difference between the AGC scheduling active power setting value and the active power actual value is less than or equal to the active power threshold P. If not, proceed to step 8; if yes, proceed to step 12.

[0138] Step 8: Determine whether the AGC scheduling active power setting value is less than the active power actual value. If not, proceed to step 9; if yes, proceed to step 11.

[0139] Step 9: The computer monitoring system automatically increases the AGC station setting value by P and proceeds to step 10.

[0140] Step 10: Delay for a specific time period T2 and proceed to step 7.

[0141] Step 11: The computer monitoring system automatically adjusts the AGC station setting value to a smaller value P and goes to step 10.

[0142] Step 12: The computer monitoring system automatically switches the AGC to "Scheduling" and proceeds to Step 13.

[0143] Step 13: The computer monitoring system automatically returns the command for dispatch: the AGC mode is switched to "active power setting, dispatching, closed loop" and the execution is completed.

[0144] In the embodiment of the present application, when the AGC command type is the second instruction, the dispatcher no longer issues a new dispatch active power setting value, and the actual active power generation value of the power station tracks the last dispatch active power setting value issued.

[0145] In an optional embodiment, it is also possible to consider giving the power station operator the authority to adjust the AGC station adjustment set value according to the actual situation of the power station in the "active power given" working mode. Taking into account the actual needs of the power station operation and possible emergencies, the power station operator can adjust the AGC station adjustment set value according to the real-time operating status of the power station, equipment status, environmental factors and other factors in the "active power given" working mode. This adjustment operation can maximize the actual operation needs of the power station while ensuring the stable operation of the power grid, and improve the operating efficiency and economic benefits of the power station.

[0146] Furthermore, the power station operator's adjustment of the AGC station setting value should be subject to certain restrictions and monitoring to ensure the rationality and safety of the adjustment operation. The monitoring system should record the adjustment operation in real time and send a notification to the dispatcher on duty when necessary so that the dispatcher on duty can monitor and evaluate the operation status of the power station.

[0147] In an optional embodiment, when the power station load changes significantly, the monitoring system can be set to automatically determine and adjust the AGC working mode. This automatic adjustment mechanism can ensure that the power grid system can maintain stable operation when the load changes, thereby improving the reliability and safety of the power grid.

[0148] Furthermore, when the monitoring system automatically adjusts the AGC working mode, it should comprehensively consider the actual operating conditions of the power station, equipment status, environmental factors and other factors to ensure that the adjusted working mode can meet the actual operating needs of the power station. At the same time, the monitoring system should also monitor and evaluate the adjusted working mode in real time to ensure the stable operation of the power grid system.

[0149] In an optional embodiment, the monitoring system can also be set to regularly collect statistics and analyze the AGC operation data of the power station in order to evaluate and optimize the operation status of the power station. The monitoring system should regularly collect statistics and analyze the AGC operation data of the power station, which may include data such as the actual active power value of the power station, the planned load value, the scheduling active power setting value, and the AGC station adjustment setting value. By analyzing these data, the operation status, load changes, equipment status and other information of the power station can be understood, providing strong support for the operation optimization and troubleshooting of the power station.

[0150] Furthermore, the monitoring system can also send corresponding prompts and suggestions to the power plant operator or dispatcher based on the analysis results to help them better manage and maintain the operation of the power plant. This intelligent data analysis and management method can improve the operation efficiency and management level of the power plant and reduce operation costs and risks.

[0151] In summary, the present invention proposes an automatic switching method for AGC mode based on the linkage of plant and station monitoring and dispatching and command systems. When the AGC command is switched from the first instruction to the second instruction, the planned load curve of the power station issued by the power grid dispatching and command system is obtained, and the planned load value at each time point of the preset step length is calculated by using the interpolation method; the planned load value is judged to determine whether the planned load value of the power station has changed within T minutes. If there is a change, the plant-level AGC working mode of the power station is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed-loop" working mode, and the second working mode is the "load curve, station dispatching, closed-loop" working mode; when the AGC command is switched from the second instruction to the third instruction, the plant-level AGC working mode of the power station is switched from the second working mode to the first working mode after the second judgment logic. The power station computer monitoring system automatically switches the AGC mode, which can effectively avoid the risk of human error and improve the accuracy of AGC mode switching; the power station computer monitoring system initiates the AGC mode switching process according to the change of AGC command type, effectively avoiding the risk of missed application and missed switching, and ensuring the timeliness of AGC mode switching; the AGC mode switching process automatically initiates application and response, effectively avoiding the risk of wrong application, missed response and miscommunication; during the AGC mode switching process, when the AGC planned load value or the dispatching active power setting value deviates greatly from the actual active power value, the computer monitoring system can automatically adjust the station dispatch setting value accordingly to avoid large load fluctuations during the switching process and impact on the power grid system. After the power station computer monitoring and dispatching command and control system are interconnected, the AGC mode switching process can realize automatic application, automatic switching, and automatic response, which greatly improves the work efficiency of the duty officer.

[0152] This embodiment also provides an AGC mode automatic switching system based on the linkage between the plant monitoring and dispatching command system, including:

[0153] The load value calculation module is used to obtain the planned load curve of the power station issued by the power grid dispatching command system when the AGC command is switched from the first instruction to the second instruction, and calculate the planned load value at each time point of the preset step length by using the interpolation method;

[0154] The first switching module is used to determine whether the planned load value of the power station changes within T minutes. If there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode;

[0155] The second switching module is used for switching the power plant-level AGC working mode from the second working mode to the first working mode after the second judgment logic when the AGC command is switched from the second instruction to the third instruction.

[0156] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0157] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 4 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, an automatic switching method of the AGC mode based on the linkage of the plant station monitoring and dispatching command system is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0158] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0159] When the AGC command is switched from the first instruction to the second instruction, the planned load curve of the power station issued by the power grid dispatching command system is obtained, and the planned load value at each time point of the preset step length is calculated by using the interpolation method;

[0160] Determine whether the planned load value of the power station changes within T minutes. If there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode;

[0161] When the AGC command is switched from the second instruction to the third instruction, the power station-level AGC working mode is switched from the second working mode to the first working mode after the second judgment logic.

[0162] Example 2

[0163] Reference Figure 1-Figure 4 , which is an embodiment of the present invention, provides an AGC mode automatic switching method and system based on the linkage of plant monitoring and dispatching command system. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0164] The effect comparison between the method of the present invention and the traditional method is shown in the following table:

[0165] Table 1: Comparison of technical indicators between the method of the present invention and the traditional method

[0166] index Method of the present invention Traditional methods Skill level requirements for operators to perform AGC mode switching Low high The duty officer did not find the possibility that the AGC mode needed to be switched none have Risk of missing application / return order when switching AGC mode No risk Medium risk Risk of miscommunication between power station duty officer and dispatch duty officer No risk Low risk The risk of AGC mode switching causing impact on the power grid system No risk Medium risk Risk of misoperation during AGC mode switching No risk Medium risk AGC mode switching application accuracy 100％ 96％ Average time required for AGC mode switching About 4 minutes About 12 minutes AGC mode switching efficiency high Low

[0167] As can be seen from the above table, the present invention reduces the skill level requirements for the on-duty personnel for AGC mode switching, eliminates the possibility that the on-duty personnel do not find that the AGC mode needs to be switched, reduces the risks of missed applications / reply orders, miscommunication, and misoperation, reduces the risk of impact that the AGC mode switching may bring to the power grid, and improves the accuracy of the AGC mode switching application and the switching efficiency. The present invention significantly shortens the time consumption of AGC mode switching.

[0168] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0169] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0170] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0171] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0172] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0173] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0174] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for automatic switching of AGC modes based on linkage between plant monitoring and dispatching command system, characterized in that: include: When the AGC command is switched from the first instruction to the second instruction, the planned load curve of the power station issued by the power grid dispatching command system is obtained, and the planned load value at each time point of the preset step length is calculated by using the interpolation method; Determine whether the planned load value of the power station changes within T minutes. If there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode; When the AGC command is switched from the second instruction to the third instruction, the power station-level AGC working mode is switched from the second working mode to the first working mode after the second judgment logic.

2. The AGC mode automatic switching method based on the linkage between the plant monitoring and dispatching command system according to claim 1 is characterized in that: Also includes: If the planned load value determines that the planned load value of the power station does not change within T minutes, the AGC command is switched from the second instruction to the first instruction.

3. The AGC mode automatic switching method based on plant monitoring and dispatching command system linkage according to claim 2 is characterized in that: The first judgment logic includes: If the planned load value of the power station changes within T minutes, an application is initiated to switch the AGC mode from the first working mode to the second working mode; After the application is initiated, the consent instruction of the power station duty officer and the permission instruction of the dispatching duty officer are obtained in turn; If the power station operator's consent instruction or the dispatch operator's permission instruction is not obtained, after a specific delay of T1, an application is initiated again to switch the AGC mode from the first working mode to the second working mode; If the power station operator's consent instruction or the dispatching operator's permission instruction is obtained, the AGC will be switched to "station dispatch".

4. The AGC mode automatic switching method based on plant monitoring and dispatching command system linkage according to claim 3 is characterized in that: The first judgment logic also includes: After switching the AGC to "station adjustment", determine whether the difference between the AGC planned load value and the active power value is less than or equal to the active power threshold P. If the difference between the two is greater than the active power threshold P, determine whether the AGC planned load value is less than the active power value. If the AGC planned load value is less than the active power actual value, the AGC station adjustment setting value is adjusted down by P, and after a specific delay time T2, it is determined again whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P; If the difference between the two is still greater than the active power threshold value P, the AGC station adjustment set value is increased by P. After a specific delay time T2, it is determined again whether the difference between the AGC planned load value and the active power actual value is less than or equal to the active power threshold value P. The AGC station adjustment active power set value is adjusted cyclically until the difference between the AGC station planned load value and the active power actual value is less than or equal to the active power threshold value P. When the difference between the two is less than or equal to the active power threshold P, the AGC is switched to the "load curve" to complete the switch from the first working mode to the second working mode.

5. The AGC mode automatic switching method based on the linkage between the plant monitoring and dispatching command system according to claim 4 is characterized in that: The second judgment logic includes: When the AGC command is switched from the second instruction to the third instruction, an application is initiated to switch the AGC mode from the second working mode to the first working mode; After the application is initiated, the consent instruction of the power station duty officer and the permission instruction of the dispatching duty officer are obtained in turn; If the power station operator's consent instruction or the dispatch operator's permission instruction is not obtained, after a specific delay of T1, an application is initiated again to switch the AGC mode from the second working mode to the first working mode; If the power station operator's consent instruction or the dispatching operator's permission instruction is obtained, the AGC will be switched to "active power setting".

6. The AGC mode automatic switching method based on plant monitoring and dispatching command system linkage according to claim 5 is characterized in that: The second judgment logic further includes: After switching the AGC to "active power setting", determine whether the difference between the AGC scheduling active power setting value and the active power actual value is less than or equal to the active power threshold P. If the difference between the two is greater than the active power threshold P, determine whether the AGC scheduling active power setting value is less than the active power actual value; If the AGC dispatch active power setting value is less than the active power actual value, the AGC station adjustment setting value is reduced by P, and after a specific delay time T2, it is determined again whether the difference between the AGC dispatch active power setting value and the active power actual value is less than or equal to the active power threshold value P; If the difference between the two is still greater than the active power threshold value P, the AGC station adjustment set value is increased by P. After a specific delay time T2, it is determined again whether the difference between the AGC dispatch active power set value and the active power actual value is less than or equal to the active power threshold value P. The AGC station adjustment active power set value is adjusted cyclically until the difference between the AGC dispatch active power set value and the active power actual value is less than or equal to the active power threshold value P. When the difference between the two is less than or equal to the active power threshold P, the AGC is switched to "scheduling" to complete the switching from the second working mode to the first working mode.

7. The AGC mode automatic switching method based on plant monitoring and dispatching command system linkage according to claim 6 is characterized in that: Also includes: When the AGC command type is the second instruction, the dispatcher no longer issues a new dispatch active power setting value, and the actual active power generation value of the power station tracks the last dispatch active power setting value issued.

8. An AGC mode automatic switching system based on plant monitoring and dispatching command system linkage, characterized in that: include: The load value calculation module is used to obtain the planned load curve of the power station issued by the power grid dispatching command system when the AGC command is switched from the first instruction to the second instruction, and calculate the planned load value at each time point of the preset step length by using the interpolation method; The first switching module is used to determine whether the planned load value of the power station changes within T minutes. If there is a change, the power station plant-level AGC working mode is switched from the first working mode to the second working mode after the first judgment logic. The first working mode is the "active power setting, dispatching, closed loop" working mode, and the second working mode is the "load curve, station dispatching, closed loop" working mode; The second switching module is used for switching the power plant-level AGC working mode from the second working mode to the first working mode after the second judgment logic when the AGC command is switched from the second instruction to the third instruction.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

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

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