A primary frequency modulation test method, device, system and readable storage medium

Abstract

The present application discloses a primary frequency modulation test method, device, system and computer-readable storage medium, the method comprising: obtaining test frequencies corresponding to multiple operating conditions according to historical frequency disturbances of the power grid and preset frequency curves of unit frequency modulation drills; selecting a target operating condition according to the current operating state of the unit, judging whether the unit meets the frequency modulation conditions according to the operating data of the unit and the basic parameters of the unit; if so, sending the test frequency corresponding to the target operating condition to the unit, which responds to the unit; calculating the primary frequency modulation test performance index of the computer unit according to the response data of the unit, and obtaining the primary frequency modulation test result according to the primary frequency modulation test performance index. The above technical scheme disclosed in the present application realizes automatic testing of the unit, improves the safety of the primary frequency modulation test, and performs a primary frequency modulation test by using the test frequency corresponding to the obtained operating condition to make the test more realistically and comprehensively reflect the primary frequency modulation performance of the unit, thereby improving the accuracy of the primary frequency modulation test.

Description

Technical Field

[0001] The present application relates to the technical field of power system testing, and more specifically, to a primary frequency modulation testing method, device, system and computer-readable storage medium. Background Art

[0002] It is necessary to conduct a frequency regulation performance test on the generator set regularly to ensure that the unit meets the primary frequency regulation performance requirements under the premise of safe and stable operation.

[0003] At present, the existing method for testing the primary frequency regulation performance of a generator set is to use artificial simulation test frequency, and to obtain frequency deviation by modifying the actual frequency regulation speed value in the DCS (Distributed Control System) / DEH (Digital Electric Hydraulic Control System) logic to perform a primary frequency regulation test on the unit. Among them, the deviation signal obtained in the test is a step signal, and the method is implemented in the form of step disturbance. However, since most of the actual frequency disturbances that appear in the power grid are not step disturbances, this test method cannot correctly reflect the true primary frequency regulation performance of the generator set. In addition, since the specific implementation of this test method is to manually input the speed value, it will also increase the dependence on manual labor, and it is easy to threaten the safety of the unit and the power grid due to human input errors.

[0004] In summary, how to improve the safety and accuracy of a frequency modulation test and realize the automatic execution of a frequency modulation test is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a primary frequency modulation test method, device, system and computer-readable storage medium, which are used to improve the safety and accuracy of the primary frequency modulation test and realize the automatic execution of the primary frequency modulation test.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A primary frequency modulation test method, comprising:

[0008] According to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise, the test frequencies corresponding to multiple working conditions are obtained in advance;

[0009] Selecting a target operating condition from the multiple operating conditions according to the current operating state of the unit, acquiring the operating data of the unit, and judging whether the unit meets the frequency modulation condition according to the operating data of the unit and the basic parameters of the unit;

[0010] If yes, each test frequency corresponding to the target operating condition is sent to the unit in sequence, and the unit responds to each test frequency corresponding to the target operating condition;

[0011] Response data of the unit when responding is obtained, a primary frequency modulation test performance index of the unit is calculated according to the response data and basic parameters of the unit, and a primary frequency modulation test result is obtained according to the primary frequency modulation test performance index.

[0012] Preferably, if the number of the target operating conditions is greater than 1, the operating data of the unit is obtained, and whether the unit meets the frequency modulation condition is determined according to the operating data of the unit and the basic parameters of the unit. If so, the test frequencies corresponding to the target operating conditions are sequentially sent to the unit, including:

[0013] Selecting a target operating condition that has not been issued as the current target operating condition, obtaining the operating data of the unit before issuing the first test frequency corresponding to the current target operating condition to the unit, and judging whether the unit meets the frequency modulation condition according to the operating data of the unit and the basic parameters of the unit, and if so, issuing each test frequency corresponding to the current target operating condition to the unit in sequence;

[0014] The step of selecting an unissued target operating condition as the current target operating condition is performed until the test frequencies corresponding to the last unissued target operating condition are sequentially issued to the unit.

[0015] Preferably, the test frequencies corresponding to the current target operating condition are sequentially sent to the unit, including:

[0016] The first time lengths of the test frequency intervals corresponding to the current target operating condition are sequentially sent to the units.

[0017] Preferably, it also includes:

[0018] The time for issuing the first test frequency corresponding to the next target working condition is controlled to differ from the time for issuing the last test frequency corresponding to the previous target working condition by a second time length.

[0019] Preferably, after obtaining the test frequencies corresponding to the multiple working conditions, the method further includes:

[0020] The test frequencies corresponding to the various working conditions are stored in a sample library.

[0021] Preferably, before storing the test frequencies corresponding to the working conditions in the sample library, the method further includes:

[0022] Performing data integrity and data security verification on the test frequencies corresponding to each of the working conditions;

[0023] If the test frequency corresponding to the working condition passes the data integrity and data security verification, the step of storing the test frequency corresponding to the working condition in a sample library is performed.

[0024] Preferably, after the test frequencies corresponding to the target operating conditions are sequentially sent to the units, the method further includes:

[0025] Data recording is performed on the response process of the unit, and a recording file is generated.

[0026] A primary frequency modulation test device, comprising:

[0027] A test frequency module is obtained, which is used to obtain the test frequencies corresponding to multiple working conditions according to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise;

[0028] A judgment module, configured to select a target operating condition from the multiple operating conditions according to the current operating state of the unit, obtain the operating data of the unit, and judge whether the unit meets the frequency modulation condition according to the operating data of the unit and the basic parameters of the unit;

[0029] A sending module, used for sending each test frequency corresponding to the target working condition to the unit in sequence if the unit meets the frequency modulation condition, and the unit responds to each test frequency corresponding to the target working condition;

[0030] The test result obtaining module is used to obtain the response data of the unit when responding, calculate the primary frequency regulation test performance index of the unit according to the response data and the basic parameters of the unit, and obtain the primary frequency regulation test result according to the primary frequency regulation test performance index.

[0031] A primary frequency modulation test system, comprising:

[0032] An information interface, used to connect to the unit to send each test frequency corresponding to the target operating condition to the unit and obtain the operating data and response data of the unit;

[0033] Data interface, used to receive historical frequency disturbances of the power grid and preset frequency curves of unit frequency regulation exercises;

[0034] Memory for storing computer programs;

[0035] A processor is used to implement the steps of the primary frequency modulation test method as described in any one of the above items when executing the computer program.

[0036] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the primary frequency modulation test method as described in any one of the above items are implemented.

[0037] The present application provides a primary frequency modulation test method, device, system and computer-readable storage medium, wherein the method comprises: obtaining test frequencies corresponding to multiple operating conditions in advance according to historical frequency disturbances of the power grid and preset frequency curves of frequency modulation drills of the unit; selecting a target operating condition from multiple operating conditions according to the current operating state of the unit, and obtaining the operating data of the unit, and judging whether the unit meets the frequency modulation conditions according to the operating data of the unit and the basic parameters of the unit; if so, sending each test frequency corresponding to the target operating condition to the unit in sequence, and the unit responds to each test frequency corresponding to the target operating condition; obtaining response data when the unit responds, calculating the primary frequency modulation test performance index of the computer group according to the response data and the basic parameters of the unit, and obtaining the primary frequency modulation test result according to the primary frequency modulation test performance index.

[0038] The above technical solution disclosed in the present application obtains test frequencies corresponding to multiple working conditions in advance according to the historical frequency disturbance of the power grid and the preset unit frequency regulation exercise frequency curve, and selects the target working condition from the multiple working conditions obtained in advance after receiving the primary frequency regulation instruction, and after determining that the unit meets the frequency regulation conditions according to the collected operation data of the unit and the basic parameters of the unit, the test frequencies corresponding to the selected target working conditions are sequentially sent to the unit, and the unit responds to the test frequency corresponding to the target working condition, and calculates the primary frequency regulation test performance index according to the response data of the unit and obtains the primary frequency regulation test result accordingly, so as to realize the automatic primary frequency regulation test of the unit, reduce the dependence on manual labor, and avoid the threat to the safety of the unit and the power grid due to the manual input of the wrong frequency, thereby improving the safety of the primary frequency regulation test, and because the test frequency corresponding to the working condition obtained in the present application is closer to the real frequency disturbance, therefore, the method of using the test frequency corresponding to the working condition to perform the primary frequency regulation test can make the test more real and comprehensive reflect the primary frequency regulation performance of the unit, thereby improving the accuracy of the primary frequency regulation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0040] Figure 1 A flow chart of a primary frequency modulation test method provided in an embodiment of the present application;

[0041] Figure 2 A diagram showing the data import interface provided in the embodiment of the present application;

[0042] Figure 3 A display diagram showing the unit operation data provided in the embodiment of the present application and the result of judging whether the unit meets the frequency regulation conditions;

[0043] Figure 4 A graph showing the calculation results of a frequency modulation test performance index provided in an embodiment of the present application;

[0044] Figure 5 A result report display diagram provided for the embodiment of the present application;

[0045] Figure 6 A test frequency display diagram after verification provided by an embodiment of the present application;

[0046] Figure 7 A display diagram of a recording file provided in an embodiment of the present application;

[0047] Figure 8 A structural schematic diagram of a primary frequency modulation test device provided in an embodiment of the present application;

[0048] Fig. 9 A structural schematic diagram of a primary frequency modulation test system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to ensure the safe operation of the power grid and generator sets, enable the grid-connected generator sets to adapt to the changes in the load and frequency of the power grid at any time, and improve the power quality and the control level of the power grid frequency, the primary frequency regulation capability of the generator sets must be fully utilized. It is necessary to conduct a primary frequency regulation performance test on the generator sets regularly to ensure that the generator sets meet the primary frequency regulation performance requirements under the premise of safe and stable operation.

[0050] At present, the existing primary frequency regulation performance test method of the generator set is implemented by artificially simulating the test frequency. Specifically, the actual frequency regulation speed value is manually modified in the DCS / DEH logic according to the frequency deviation to perform a primary frequency regulation test on the unit. Among them, the simulated test frequency adopts step disturbance, and most of them are small frequency difference signals within 3000±2.1rpm. In very rare special cases, a large-value signal of 3000±2.5rpm appears. Moreover, when the primary frequency regulation test is performed manually, the input speed value is a fixed speed value (specifically, a data is selected from the above frequency difference signal and input into the unit). However, since the actual frequency in the power grid has both small frequency difference and large frequency difference, and most of them are not step disturbances, but irregular disturbance signals, therefore, the existing frequency regulation test method reflects the primary frequency regulation output of the generator set in response to the step small frequency difference signal, and cannot correctly reflect the true primary frequency regulation performance of the generator set. In addition, in the existing process of manually conducting a frequency modulation test, each step must be manually involved, and when testing multiple working conditions, the DCS / DEH logic parameters of the unit need to be manually modified frequently. This results in a frequency modulation test being highly dependent on manual labor, and it is easy for human input errors to occur during the test. Once a human input error occurs, it threatens the normal operation of the unit and even threatens the security of the power grid.

[0051] To this end, the present application provides a primary frequency regulation test technical solution for automatically performing a primary frequency regulation test on the unit to reduce reliance on manual labor, thereby avoiding input errors and enabling the test to correctly reflect the actual primary frequency regulation performance of the generator set.

[0052] In order to make those skilled in the art understand the technical solution more clearly, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0053] See also Figure 1 , which shows a flow chart of a primary frequency modulation test method provided in an embodiment of the present application. A primary frequency modulation test method provided in an embodiment of the present application may include:

[0054] S11: According to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise, the test frequencies corresponding to the multiple working conditions are obtained in advance.

[0055] Before performing a frequency modulation test on the unit, the frequency modulation test system can first obtain the historical frequency disturbance of the power grid, wherein the historical frequency disturbance of the power grid can specifically include the frequency disturbance that actually occurred in the power grid without causing an accident, and the historical frequency data in the accident frequency curve corresponding to the accident caused by the power grid frequency disturbance. At the same time, the preset unit frequency modulation drill frequency curve can be obtained, wherein the unit frequency modulation drill frequency curve specifically includes targeted drills for UHV tripping, targeted drills for low-frequency oscillation, targeted drills for coupled oscillations of inter-regional units, drills for generator control characteristics under isolated grid operation, and drills for high-frequency crossing characteristics of the power grid. If the UHV line is locked and causes a power grid accident, the test frequency with the characteristics of the accident at that time can be simulated, and the control characteristics of the generator to respond to the event can be tested by applying the test frequency to the unit's primary frequency modulation circuit in the future, so as to find deficiencies and make timely improvements. Through the above process, it can be seen that the obtained test frequency includes historical recording data of the power grid frequency, step data under various working conditions, data corresponding to the targeted drill frequency curve, etc.

[0056] It should be noted that the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation drill obtained here can support common txt and csv format files. For details, please refer to Figure 2 , which shows a data import interface display diagram provided in an embodiment of the present application. By importing data into a primary frequency regulation test system, the system can obtain the historical frequency disturbance of the power grid and the preset unit frequency regulation exercise frequency curve.

[0057] After obtaining the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise, the test frequencies corresponding to multiple working conditions can be obtained according to the obtained historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise. Specifically, one exercise frequency curve can be one working condition, and one historical frequency disturbance of the power grid can be one working condition. The frequency corresponding to each curve and disturbance is the test frequency corresponding to the working condition, and the test frequency corresponding to each working condition can complete one frequency regulation test. In addition, after obtaining the test frequencies corresponding to multiple working conditions, these working conditions and their corresponding test frequencies can be displayed so that users can know them in time and make selections.

[0058] Since the test frequency corresponding to each operating condition in the present application is the test frequency corresponding to each operating condition obtained based on the historical frequency disturbance of the power grid, the test frequency corresponding to each operating condition obtained can more realistically reflect the frequency disturbance of the power grid. Therefore, when a frequency modulation test is performed according to these test frequencies, the test can more realistically and comprehensively reflect the primary frequency modulation performance of the unit, thereby facilitating improving the accuracy of the test.

[0059] S12: Select a target operating condition from multiple operating conditions according to the current operating status of the unit, and obtain the operating data of the unit, and determine whether the unit meets the frequency regulation conditions according to the operating data and basic parameters of the unit; if so, execute step S13, if not, a prompt can be issued that a frequency regulation test cannot be performed at present.

[0060] When it is necessary to perform a frequency modulation test on the unit, the current operating state of the unit can be obtained, and the target operating condition corresponding to the current operating state of the unit can be selected from the test frequencies corresponding to the multiple operating conditions obtained in step S11 according to the current operating state of the unit. For example, for a unit with unsatisfactory primary frequency modulation performance results during high-frequency disturbance, the frequency of the high-frequency disturbance can be used as the target operating condition to specifically test the frequency modulation characteristics of the unit under high-frequency disturbance, etc. At the same time, the primary frequency modulation test system can collect the operating data of the unit in real time through the information interface.

[0061] After the operating data of the unit is collected and the target operating condition is selected, the recent operating data of the unit can be obtained from the collected operating data of the unit (for example, the operating data within the first 5 seconds of the first test frequency corresponding to the target operating condition is obtained), and the unit is judged whether it meets the frequency modulation conditions based on the obtained operating data of the unit and the basic parameters of the unit, wherein the basic parameters mentioned here can be pre-configured by the user in a frequency modulation test system, and the basic parameters can specifically include unit capacity, unit speed inequality, unit speed dead zone, etc. In addition, the above-mentioned judgment of whether the unit meets the frequency modulation conditions based on the collected operating data of the unit and the basic parameters of the unit can specifically be to judge whether the unit is not in an abnormal disturbance state, whether there are no other actions, whether it is in a safe state, etc. If it is determined that the unit meets the frequency modulation conditions, it indicates that a frequency modulation test can be performed on the unit. If it is determined that the unit does not meet the frequency modulation conditions, it indicates that a frequency modulation test cannot be performed on the unit temporarily. At this time, the response data of the unit is empty. Therefore, a prompt that a frequency modulation test cannot be performed at present can be directly issued to prompt that the unit cannot perform a frequency modulation test in the current state. At the same time, it can be transferred to step S14, as shown in detail. Figure 3 As shown, it shows the display of unit operation data and the display of the results of judging whether the unit meets the frequency regulation conditions provided in the embodiment of the present application.

[0062] S13: Send each test frequency corresponding to the target operating condition to the unit in sequence, and the unit responds to the test frequency corresponding to the target operating condition.

[0063] If it is determined that the unit meets the frequency modulation conditions, the test frequencies corresponding to the selected target working conditions can be sent to the unit in sequence, specifically to the unit's DCS / DEH. After receiving the test frequency, the unit's DCS / DEH can respond to the test frequency corresponding to the target working condition. Specifically, the conversion of the test frequency to the speed signal can be realized through the supporting control logic to respond to the primary frequency modulation to increase / decrease load, test start and stop, fault exit and other functions.

[0064] S14: Acquire response data of the unit when responding, calculate the primary frequency modulation test performance index of the unit according to the response data and basic parameters of the unit, and obtain the primary frequency modulation test result according to the primary frequency modulation test performance index.

[0065] When the unit responds to the test frequency corresponding to the target operating condition, the response data of the unit can be obtained, which may include electric power response data, etc. After that, the primary frequency regulation test performance index of the unit can be calculated based on the obtained response data and the basic parameters of the unit and the collected operation data of the unit. The primary frequency regulation test performance index mentioned here may include primary frequency regulation contribution rate, theoretical power, actual power, speed regulation inequality rate, delay time, etc. For details, please refer to Figure 4 , which shows a display diagram of the calculation results of a frequency modulation test performance indicator provided in an embodiment of the present application.

[0066] After calculating the primary frequency regulation test performance index of the unit, the primary frequency regulation test result can be obtained according to the primary frequency regulation test performance index and the primary frequency regulation test result can be displayed. Specifically, the primary frequency regulation test performance index can be analyzed, and a result report can be generated according to the analysis result, and the result report can be displayed. For details, please refer to Figure 5 , which shows a result report display diagram provided in an embodiment of the present application.

[0067] Through the above process, it can be known that the present application can automatically implement a frequency modulation test on the unit, therefore, it can reduce manual participation, reduce dependence on manual labor, improve the accuracy and safety of a frequency modulation test, and can perform a frequency modulation test on the unit under multiple working conditions at one time. The entire test process is simple, convenient, efficient, highly automated and highly repeatable. In addition, a frequency modulation test can be performed by using the test frequency corresponding to the working condition obtained according to the historical frequency disturbance of the power grid and the preset unit frequency modulation drill frequency curve, so that the test can more truly and comprehensively reflect the primary frequency modulation performance of the unit.

[0068] The above technical solution disclosed in the present application obtains test frequencies corresponding to multiple working conditions in advance according to the historical frequency disturbance of the power grid and the preset unit frequency regulation exercise frequency curve, and selects the target working condition from the multiple working conditions obtained in advance after receiving the primary frequency regulation instruction, and after determining that the unit meets the frequency regulation conditions according to the collected operation data of the unit and the basic parameters of the unit, the test frequencies corresponding to the selected target working conditions are sequentially sent to the unit, and the unit responds to the test frequency corresponding to the target working condition, and calculates the primary frequency regulation test performance index according to the response data of the unit and obtains the primary frequency regulation test result accordingly, so as to realize the automatic primary frequency regulation test of the unit, reduce the dependence on manual labor, and avoid the threat to the safety of the unit and the power grid due to the manual input of the wrong frequency, thereby improving the safety of the primary frequency regulation test, and because the test frequency corresponding to the working condition obtained in the present application is closer to the real frequency disturbance, therefore, the method of using the test frequency corresponding to the working condition to perform the primary frequency regulation test can make the test more real and comprehensive reflect the primary frequency regulation performance of the unit, thereby improving the accuracy of the primary frequency regulation test.

[0069] The embodiment of the present application provides a primary frequency modulation test method. If the number of target operating conditions is greater than 1, the operating data of the unit is obtained, and whether the unit meets the frequency modulation condition is determined according to the operating data of the unit and the basic parameters of the unit. If so, the test frequency corresponding to the target operating condition is sequentially sent to the unit, which may include:

[0070] Select an unissued target operating condition as the current target operating condition. Before issuing the first test frequency corresponding to the current target operating condition to the unit, obtain the unit's operating data, and determine whether the unit meets the frequency regulation conditions based on the unit's operating data and the unit's basic parameters. If so, issue each test frequency corresponding to the current target operating condition to the unit in sequence.

[0071] The step of selecting an unissued target operating condition as the current target operating condition is executed until each test frequency corresponding to the last unissued target operating condition is sequentially issued to the unit.

[0072] When selecting a target operating condition from multiple operating conditions according to the current operating state of the unit, if the number of selected target operating conditions is greater than 1, the process of sending the test frequency is as follows:

[0073] Step 1: Select a target operating condition among multiple target operating conditions that has not issued a test frequency as the current target operating condition, and before issuing the first test frequency corresponding to the current target operating condition (the first test frequency mentioned here is the first test frequency to be issued in the order of issuance) to the unit, first obtain the operating data of the unit (specifically, obtain the recent operating data of the unit as mentioned above), and judge whether the unit meets the frequency regulation conditions based on the obtained operating data of the unit and the basic parameters of the unit. If not, a prompt that a frequency regulation test cannot be performed at present can be issued, and the test is terminated, and the process goes to step S14. If satisfied, the test frequencies corresponding to the current target operating condition are issued to the unit in sequence (specifically, the first test frequency mentioned above is issued first, and then the second test frequency is issued...);

[0074] Step 2: After the test frequency corresponding to the current target operating condition is issued, select a target operating condition from the remaining target operating conditions whose test frequencies have not been issued as the current operating condition, that is, repeat steps 1 and 2 until the last target operating condition whose test frequency has not been issued is selected as the current target operating condition, and the test frequencies corresponding to the target operating condition are issued to the unit in sequence.

[0075] Through the above process, it can be known that the present application judges whether the unit meets the frequency regulation conditions before each time sending the test frequency corresponding to the target operating condition to the unit, that is, before each time sending the first test frequency corresponding to the target operating condition, a judgment is made whether the unit meets the frequency regulation conditions, so as to ensure the safety of a frequency regulation test of the unit.

[0076] A primary frequency modulation test method provided in an embodiment of the present application sequentially sends each test frequency corresponding to the current target operating condition to the unit, which may include:

[0077] The first time length of each test frequency interval corresponding to the current target operating condition is sent to the unit in sequence.

[0078] In the present application, when the test frequencies corresponding to the current target operating condition are sent to the unit in sequence, the test frequencies corresponding to the current target operating condition can be sent to the unit in sequence with an interval of the first time length, that is, for each target operating condition, when sending the corresponding test frequencies, they can be sent in a manner of intervals of the first time length, that is, for the same operating condition, the sending time of the previous test frequency and the sending time of the next test frequency can differ by the first time length, so as to give the unit response time to each test frequency and avoid the frequency causing the unit to operate and causing the unit to be unable to operate safely and stably.

[0079] It should be noted that the first time length can be pre-configured by the user in the primary frequency modulation test system according to the characteristics of the unit. Specifically, the first time length can be 20 milliseconds. Of course, it can also be modified according to actual needs. This application does not impose any limitation on this.

[0080] A primary frequency modulation test method provided in an embodiment of the present application may further include:

[0081] The time for issuing the first test frequency corresponding to the next target working condition is controlled to differ from the time for issuing the last test frequency corresponding to the previous target working condition by a second time length.

[0082] In the present application, the sending time of the first test frequency corresponding to the next target operating condition can be controlled to differ from the sending time of the last test frequency corresponding to the previous target operating condition by a second time length, that is, after sending the last test frequency corresponding to the previous target operating condition, you can wait for the second time length before sending the first test frequency corresponding to the next target operating condition, that is, the sending time interval between the two target operating conditions can be the second time interval, so as to avoid the impact of the unit's uninterrupted frequent action on its operation, thereby ensuring safe and stable operation.

[0083] It should be noted that the second time interval can also be pre-configured in the primary frequency modulation test system by the user according to the characteristics of the unit, wherein the second time interval can be greater than the first time interval, and can be specifically 90 seconds. Of course, it can also be modified according to actual needs, and this application does not impose any restrictions on this. In addition, it should be noted that during the second waiting time length, the primary frequency modulation test system can select the current target operating condition, determine whether the unit meets the frequency modulation conditions, and other steps.

[0084] A primary frequency modulation test method provided in an embodiment of the present application may further include, after obtaining the test frequencies corresponding to the multiple working conditions:

[0085] The test frequency corresponding to each working condition is stored in the sample library.

[0086] In the present application, after obtaining the test frequencies corresponding to multiple operating conditions, the test frequencies corresponding to each operating condition can be stored in a sample library, and the test frequencies corresponding to each operating condition can be stored separately during the storage process, so that the test frequencies corresponding to each operating condition can be directly obtained from the sample library and sent to the unit in sequence, and the test frequencies corresponding to each operating condition can be viewed from the sample library later.

[0087] A primary frequency modulation test method provided by an embodiment of the present application may further include, before storing the test frequencies corresponding to each working condition in a sample library:

[0088] Verify data integrity and data security for the test frequency corresponding to each working condition;

[0089] If the test frequency corresponding to the working condition passes the data integrity and data security verification, the step of storing the test frequency corresponding to the working condition in the sample library is performed.

[0090] Before storing the test frequencies corresponding to each working condition in the sample library, the test frequencies corresponding to each working condition can be verified for data integrity and data security. The data integrity verification of the test frequencies corresponding to each working condition can be implemented by judging the data length. Specifically, according to the two detailed requirements published by the regional power grid dispatching agencies, during a frequency modulation test, the frequency modulation time T is greater than a certain time threshold T0 (such as 15s) and the frequency modulation test is considered to be a valid test. Otherwise, it is an invalid test. The frequency modulation time corresponding to each working condition can be calculated by the data length L of the test frequency (the data length is specifically the number of test frequencies) and the time interval T1 (i.e., the first time interval) of the test frequency. That is, frequency modulation time T = data length L of the test frequency * time interval T1 of the test frequency. For example, if L is 3000 and T1 is 20 milliseconds, then T is 300. 0*20 milliseconds = 60000 milliseconds, i.e., 60 seconds. The above calculation formula can be used to verify whether the frequency modulation time T corresponding to each operating condition is greater than the time threshold T0. If it is greater than, the test frequency corresponding to the operating condition passes the data integrity check. If it is not greater than, the test frequency corresponding to the operating condition fails the data integrity check. The data security check for the test frequencies corresponding to each operating condition can be specifically implemented by determining the range of the test frequencies corresponding to each operating condition. For each operating condition, when the corresponding test frequencies are all within the interval range of [n1, n2], where n1 is the minimum frequency disturbance value that the unit can withstand, and n2 is the maximum frequency disturbance value that the unit can withstand, the test frequencies corresponding to the operating condition pass the data security check. If there is a test frequency among the test frequencies corresponding to the operating condition that exceeds the above interval range, the test frequencies corresponding to the operating condition fail the data security check.

[0091] When the test frequency corresponding to each working condition is verified for data integrity and data security in the above manner, if the test frequency corresponding to the working condition passes the data integrity and data security verification, the test frequency corresponding to the working condition is stored in the sample library. If the test frequency corresponding to the working condition fails to pass the data integrity and / or data security verification, the test frequency corresponding to the working condition is not stored in the sample library, and a prompt indicating that the verification failed and the test frequency needs to be re-uploaded may be displayed. For details, please refer to Figure 6 , which shows a test frequency display diagram after verification provided in an embodiment of the present application, wherein the test frequency displayed in the display diagram is specifically a test frequency corresponding to an operating condition.

[0092] The above process can avoid storing abnormal data in the sample library, which may cause malfunction of the unit during a frequency modulation test, thereby ensuring the safety of the unit and the power grid.

[0093] A primary frequency modulation test method provided in an embodiment of the present application may further include, after the test frequency corresponding to the target working condition is sequentially sent to the unit:

[0094] The data of the unit's response process is recorded and a recording file is generated.

[0095] In this application, after the test frequency corresponding to the target working condition is sent to the unit in sequence, the data of the unit's response process can be recorded. Specifically, various data of the unit during the response process (including test frequency, power, etc.) can be recorded and a recording file can be generated. The recording file can be displayed while displaying the result of a frequency modulation test. For details, see Figure 7 , which shows a display diagram of the recording file provided in an embodiment of the present application.

[0096] The present application also provides a primary frequency modulation test device, see Figure 8 , which shows a structural schematic diagram of a primary frequency modulation test device provided in an embodiment of the present application, which may include:

[0097] A test frequency obtaining module 21 is used to obtain test frequencies corresponding to multiple working conditions according to historical frequency disturbances of the power grid and a preset frequency curve of frequency regulation exercise of the unit in advance;

[0098] The judgment module 22 is used to select a target operating condition from multiple operating conditions according to the current operating state of the unit, obtain the operating data of the unit, and judge whether the unit meets the frequency regulation conditions according to the operating data of the unit and the basic parameters of the unit;

[0099] The sending module 23 is used to send each test frequency corresponding to the target working condition to the unit in sequence if the unit meets the frequency regulation condition, and the unit responds to the test frequency corresponding to the target working condition;

[0100] The test result obtaining module 24 is used to obtain the response data of the unit when responding, calculate the primary frequency modulation test performance index of the unit according to the response data and the basic parameters of the unit, and obtain the primary frequency modulation test result according to the primary frequency modulation test performance index.

[0101] In a primary frequency modulation test device provided in an embodiment of the present application, if the number of target operating conditions is greater than 1, the judgment module 22 may include:

[0102] A selection unit is used to select a target operating condition that has not been issued as the current target operating condition, obtain the operating data of the unit before issuing the first test frequency corresponding to the current target operating condition to the unit, and judge whether the unit meets the frequency regulation condition according to the operating data of the unit and the basic parameters of the unit, and if so, issue each test frequency corresponding to the current target operating condition to the unit in sequence;

[0103] The execution unit is used to execute the step of selecting an unissued target operating condition as the current target operating condition until the test frequencies corresponding to the last unissued target operating condition are issued to the unit in sequence.

[0104] An embodiment of the present application provides a primary frequency modulation test device, wherein the selection unit may include:

[0105] The sending subunit is used to send the first time length of each test frequency interval corresponding to the current target working condition to the unit in sequence.

[0106] A primary frequency modulation test device provided in an embodiment of the present application may further include:

[0107] The control module is used to control the difference between the sending time of the first test frequency corresponding to the next target working condition and the sending time of the last test frequency corresponding to the previous target working condition by a second time length.

[0108] A primary frequency modulation test device provided in an embodiment of the present application may further include:

[0109] The storage module is used to store the test frequencies corresponding to the various working conditions in a sample library after obtaining the test frequencies corresponding to the multiple working conditions.

[0110] A primary frequency modulation test device provided in an embodiment of the present application may further include:

[0111] A verification module, used for verifying the data integrity and data security of the test frequency corresponding to each working condition before storing the test frequency corresponding to each working condition in the sample library;

[0112] The execution module is used to execute the step of storing the test frequency corresponding to the working condition in the sample library if the test frequency corresponding to the working condition passes the data integrity and data security verification.

[0113] A primary frequency modulation test device provided in an embodiment of the present application may further include:

[0114] The recording module is used to record the data of the response process of the unit after the test frequency corresponding to the target working condition is sent to the unit in sequence, and generate a recording file.

[0115] The present application also provides a primary frequency modulation test system. Fig. 9 , which shows a structural schematic diagram of a primary frequency modulation test system provided by an embodiment of the present application, which may include:

[0116] The information interface 31 is used to connect to the unit to send each test frequency corresponding to the target working condition to the unit and obtain the operation data and response data of the unit;

[0117] Data interface 32, used to receive historical frequency disturbances of the power grid and preset frequency curves of unit frequency regulation exercises;

[0118] A memory 33, used for storing computer programs;

[0119] The processor 34 can implement the following steps when executing the computer program stored in the memory:

[0120] The test frequencies corresponding to multiple working conditions are obtained in advance according to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise; the target working condition is selected from the multiple working conditions according to the current operating state of the unit, and the operating data of the unit is obtained, and whether the unit meets the frequency regulation conditions is judged according to the operating data of the unit and the basic parameters of the unit; if so, each test frequency corresponding to the target working condition is sent to the unit in turn, and the unit responds to each test frequency corresponding to the target working condition; the response data of the unit when responding is obtained, the primary frequency regulation test performance index of the computer unit is calculated according to the response data and the basic parameters of the unit, and the primary frequency regulation test result is obtained according to the primary frequency regulation test performance index.

[0121] Among them, the information interface 31 can be specifically connected to the DCS / DEH of the unit, and the primary frequency regulation test system can be used independently on site as a client device, and can also be installed in the platform of the power dispatching agency of each province, combined with the SCADA (Supervisory Control And Data Acquisition) database information, to perform remote primary frequency regulation testing on abnormal units or units with low pass rate.

[0122] The present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps can be implemented:

[0123] The test frequencies corresponding to multiple working conditions are obtained in advance according to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise; the target working condition is selected from the multiple working conditions according to the current operating state of the unit, and the operating data of the unit is obtained, and whether the unit meets the frequency regulation conditions is judged according to the operating data of the unit and the basic parameters of the unit; if so, each test frequency corresponding to the target working condition is sent to the unit in turn, and the unit responds to each test frequency corresponding to the target working condition; the response data of the unit when responding is obtained, the primary frequency regulation test performance index of the computer unit is calculated according to the response data and the basic parameters of the unit, and the primary frequency regulation test result is obtained according to the primary frequency regulation test performance index.

[0124] The computer-readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0125] The description of the relevant parts of a primary frequency modulation test device, equipment and computer-readable storage medium provided in the embodiments of the present application can be found in the detailed description of the corresponding parts of a primary frequency modulation test method provided in the embodiments of the present application, and will not be repeated here.

[0126] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment that includes a series of elements are inherent to the elements. In the absence of more restrictions, the elements limited by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment that includes the elements. In addition, the above-mentioned technical solution provided in the embodiment of the present application is consistent with the corresponding technical solution in the prior art in principle, and the part is not described in detail, so as not to repeat too much.

[0127] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A primary frequency modulation test method, characterized in that: include: According to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise, the test frequencies corresponding to multiple working conditions are obtained in advance; Selecting a target operating condition from the multiple operating conditions according to the current operating state of the unit, acquiring the operating data of the unit, and judging whether the unit meets the frequency regulation condition according to the operating data of the unit and the basic parameters of the unit; judging whether the unit meets the frequency regulation condition according to the operating data of the unit and the basic parameters of the unit includes judging whether the unit is not in an abnormal disturbance state, whether there are no other actions, and whether it is in a safe state; If yes, each test frequency corresponding to the target operating condition is sent to the unit in sequence, and the unit responds to each test frequency corresponding to the target operating condition; Acquire response data of the unit when responding, calculate a primary frequency modulation test performance index of the unit according to the response data and basic parameters of the unit, and obtain a primary frequency modulation test result according to the primary frequency modulation test performance index; If the number of the target operating conditions is greater than 1, the operating data of the unit is obtained, and whether the unit meets the frequency modulation condition is determined according to the operating data of the unit and the basic parameters of the unit. If so, the test frequencies corresponding to the target operating conditions are sequentially sent to the unit, including: Selecting a target operating condition that has not been issued as the current target operating condition, obtaining the operating data of the unit before issuing the first test frequency corresponding to the current target operating condition to the unit, and judging whether the unit meets the frequency modulation condition according to the operating data of the unit and the basic parameters of the unit, and if so, issuing each test frequency corresponding to the current target operating condition to the unit in sequence; Executing the step of selecting a target operating condition that has not been issued as the current target operating condition until each test frequency corresponding to the last target operating condition that has not been issued is issued to the unit in sequence; The test frequencies corresponding to the current target operating condition are sequentially sent to the unit, including: Sending the first time lengths of the test frequency intervals corresponding to the current target operating condition to the units in sequence; Also includes: The time for issuing the first test frequency corresponding to the next target working condition is controlled to differ from the time for issuing the last test frequency corresponding to the previous target working condition by a second time length; the second time length is greater than the first time length.

2. The primary frequency modulation test method according to claim 1, characterized in that: After obtaining the test frequencies corresponding to multiple working conditions, it also includes: The test frequencies corresponding to the various working conditions are stored in a sample library.

3. The primary frequency modulation test method according to claim 2, characterized in that: Before storing the test frequencies corresponding to the working conditions in the sample library, the method further includes: Performing data integrity and data security verification on the test frequencies corresponding to each of the working conditions; If the test frequency corresponding to the working condition passes the data integrity and data security verification, the step of storing the test frequency corresponding to the working condition in a sample library is performed.

4. The primary frequency modulation test method according to claim 1, characterized in that: After the test frequencies corresponding to the target operating conditions are sequentially sent to the units, the method further includes: Data recording is performed on the response process of the unit, and a recording file is generated.

5. A primary frequency modulation test device, characterized in that: include: A test frequency module is obtained, which is used to obtain the test frequencies corresponding to multiple working conditions according to the historical frequency disturbance of the power grid and the preset frequency curve of the unit frequency regulation exercise; A judgment module, configured to select a target operating condition from the multiple operating conditions according to the current operating state of the unit, obtain the operating data of the unit, and judge whether the unit meets the frequency regulation condition according to the operating data of the unit and the basic parameters of the unit; judging whether the unit meets the frequency regulation condition according to the operating data of the unit and the basic parameters of the unit includes judging whether the unit is not in an abnormal disturbance state, whether there are no other actions, and whether it is in a safe state; A sending module, used for sending each test frequency corresponding to the target working condition to the unit in sequence if the unit meets the frequency modulation condition, and the unit responds to each test frequency corresponding to the target working condition; A test result obtaining module is used to obtain response data when the unit responds, calculate the primary frequency regulation test performance index of the unit according to the response data and the basic parameters of the unit, and obtain the primary frequency regulation test result according to the primary frequency regulation test performance index; If the number of target working conditions is greater than 1, the judgment module includes: A selection unit, configured to select a target operating condition that has not been issued as a current target operating condition, obtain the operating data of the unit before issuing a first test frequency corresponding to the current target operating condition to the unit, and determine whether the unit meets the frequency modulation condition according to the operating data of the unit and the basic parameters of the unit, and if so, issue each test frequency corresponding to the current target operating condition to the unit in sequence; an execution unit, configured to execute the step of selecting a target operating condition that has not been issued as the current target operating condition, until each test frequency corresponding to the last target operating condition that has not been issued is issued to the unit in sequence; Selected units include: A sending subunit, used for sending the first time lengths of the test frequency intervals corresponding to the current target operating condition to the units in sequence; The primary frequency modulation test device also includes: The control module is used to control the difference between the sending time of the first test frequency corresponding to the next target working condition and the sending time of the last test frequency corresponding to the previous target working condition by a second time length; the second time length is greater than the first time length.

6. A primary frequency modulation test system, characterized in that: include: An information interface, used to connect to the unit to send each test frequency corresponding to the target operating condition to the unit and obtain the operating data and response data of the unit; Data interface, used to receive historical frequency disturbances of the power grid and preset frequency curves of unit frequency regulation exercises; Memory for storing computer programs; A processor, configured to implement the steps of the primary frequency modulation test method as described in any one of claims 1 to 4 when executing the computer program.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the primary frequency modulation test method according to any one of claims 1 to 4 are implemented.

Images