CN110750542A - Method, device and equipment for correcting parameters of synchronous generator and storage medium - Google Patents
Method, device and equipment for correcting parameters of synchronous generator and storage medium Download PDFInfo
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- CN110750542A CN110750542A CN201911000133.8A CN201911000133A CN110750542A CN 110750542 A CN110750542 A CN 110750542A CN 201911000133 A CN201911000133 A CN 201911000133A CN 110750542 A CN110750542 A CN 110750542A
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Abstract
The invention provides a method, a device, equipment and a storage medium for correcting parameters of a synchronous generator, and belongs to the technical field of generators. The method comprises the following steps: monitoring the running state of the synchronous generator and determining the running parameters of the synchronous generator; determining simulation parameters corresponding to the operation parameters of the synchronous generator according to the operation parameters of the synchronous generator; and correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters. The method can correct the simulation parameters of the synchronous generator, and improves the accuracy and the reliability of simulation analysis and calculation.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a method, a device, equipment and a storage medium for correcting parameters of a synchronous generator.
Background
When a synchronous generator is used for power generation, parameters of the synchronous generator are generally required to be obtained so as to perform simulation analysis and calculation.
Currently, the parameters of the synchronous generator are usually obtained from preset data or typical values provided by the manufacturer of the synchronous generator, and these data are generally obtained by simplifying the preset calculation formula or combining empirical values.
Due to incomplete data or inaccurate calculation and no consideration of the influence of actual operation conditions such as vortex, saturation and the like, the simulation calculation result comes in and goes out of the actual dynamic process, and the accuracy and the reliability of analysis and calculation are influenced.
Disclosure of Invention
The invention aims to provide a method, a device, equipment and a storage medium for correcting parameters of a synchronous generator, which can improve the accuracy and the reliability of simulation analysis and calculation.
The embodiment of the invention is realized by the following steps:
in one aspect of the embodiments of the present invention, a method for correcting parameters of a synchronous generator is provided, including:
monitoring the running state of the synchronous generator and determining the running parameters of the synchronous generator;
according to the operating parameters of the synchronous generator, a preset parameter database is adopted to determine simulation parameters corresponding to the operating parameters of the synchronous generator, and the parameter database comprises: a correspondence of at least one operating parameter and a simulation parameter;
and correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters.
Optionally, before determining the simulation parameter corresponding to the operating parameter of the synchronous generator by using a preset parameter database according to the operating parameter of the synchronous generator, the method further includes:
performing parameter identification on a preset initial operation parameter, and determining a simulation parameter corresponding to the initial operation parameter;
adjusting the initial operation parameters at least once according to the preset parameter adjustment amplitude, and stopping parameter adjustment until the adjusted operation parameters are greater than the preset maximum operation parameters;
respectively carrying out parameter identification on the at least one adjusted operation parameter, and determining a simulation parameter corresponding to the at least one adjusted operation parameter;
and establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter.
Optionally, the initial operating parameters include: the preset initial values of three kinds of operation parameters, the parameter adjustment range includes: the first operating parameter corresponds to the adjustment range.
Adjusting the initial operation parameter at least once according to the preset parameter adjustment amplitude until the adjusted operation parameter is greater than the preset maximum operation parameter, and stopping parameter adjustment, wherein the parameter adjustment comprises the following steps:
and adjusting the first operation parameter at least once according to the adjustment amplitude corresponding to the first operation parameter, and keeping the other two operation parameters unchanged until the adjusted first operation parameter is greater than the preset maximum value of the first operation parameter, and stopping parameter adjustment.
Establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, wherein the parameter database comprises:
according to the simulation parameters corresponding to the preset initial values of the first operation parameters and the simulation parameters corresponding to the adjusted first operation parameters, establishing a one-dimensional parameter database, wherein the one-dimensional parameter database comprises: the first operation parameter is corresponding to the simulation parameter.
Optionally, the parameter adjustment magnitude further comprises: and the second operation parameter corresponds to the adjustment amplitude.
Adjusting the initial operation parameter at least once according to the preset parameter adjustment range until the adjusted operation parameter is greater than the preset maximum operation parameter, and stopping adjusting the parameter, further comprising:
adjusting the second operation parameter at least once according to the adjustment amplitude corresponding to the second operation parameter, and keeping the other two operation parameters unchanged until the adjusted second operation parameter is larger than the preset maximum value of the second operation parameter, and stopping parameter adjustment; wherein a one-dimensional parameter database is established once each adjustment of a second operating parameter.
Establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, wherein the parameter database comprises:
establishing a two-dimensional parameter database according to at least one-dimensional parameter database obtained by adjusting the second operation parameters at least once and the one-dimensional parameter database obtained by adjusting the first operation parameters; the two-dimensional parameter database includes: a plurality of one-dimensional parameter databases.
Optionally, the parameter adjustment magnitude further comprises: and the adjustment amplitude corresponding to the third operation parameter.
Adjusting the initial operation parameter at least once according to the preset parameter adjustment range until the adjusted operation parameter is greater than the preset maximum operation parameter, and stopping adjusting the parameter, further comprising:
adjusting the third operation parameter at least once according to the adjustment amplitude corresponding to the third operation parameter, and keeping the other two operation parameters unchanged until the adjusted third operation parameter is larger than the preset maximum value of the third operation parameter, and stopping parameter adjustment; wherein a two-dimensional parameter database is established once each adjustment of the third operating parameter.
Establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, wherein the parameter database comprises:
establishing a three-dimensional parameter database according to at least one two-dimensional parameter database obtained by adjusting the third operation parameter at least once and the two-dimensional parameter database obtained by adjusting the second operation parameter; the three-dimensional parameter database includes: a plurality of two-dimensional parameter databases.
Optionally, the operating parameters of the synchronous generator comprise: active power of the synchronous generator, reactive power of the synchronous generator and terminal voltage of the synchronous generator.
In another aspect of the embodiments of the present invention, a device for correcting parameters of a synchronous generator is provided, including:
and the monitoring module is used for monitoring the running state of the synchronous generator and determining the running parameters of the synchronous generator.
The parameter operation module is used for determining simulation parameters corresponding to the operating parameters of the synchronous generator by adopting a preset parameter database according to the operating parameters of the synchronous generator, and the parameter database comprises: a correspondence of at least one operating parameter and a simulation parameter.
And the parameter correction module is used for correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters.
Optionally, the apparatus further comprises:
the parameter identification module is used for carrying out parameter identification on the preset initial operation parameters and determining simulation parameters corresponding to the initial operation parameters; and the simulation system is also used for respectively carrying out parameter identification on the at least one adjusted operation parameter and determining a simulation parameter corresponding to the at least one adjusted operation parameter.
And the parameter adjusting module is used for adjusting the initial operation parameters at least once according to the preset parameter adjusting amplitude, and stopping adjusting the parameters until the adjusted operation parameters are greater than the preset maximum operation parameters.
And the database establishing module is used for establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter.
Optionally, the parameter adjusting module is specifically configured to, according to an adjustment amplitude corresponding to the first operation parameter, perform at least one adjustment on the first operation parameter, and maintain the other two operation parameters unchanged until the adjusted first operation parameter is greater than a preset maximum value of the first operation parameter, and then stop performing the parameter adjustment.
Optionally, the database establishing module is specifically configured to establish a one-dimensional parameter database according to the simulation parameter corresponding to the preset initial value of the first operation parameter and the simulation parameter corresponding to the at least one adjusted first operation parameter, where the one-dimensional parameter database includes: the first operation parameter is corresponding to the simulation parameter.
Optionally, the parameter adjusting module is specifically configured to, according to an adjustment amplitude corresponding to the second operation parameter, perform at least one adjustment on the second operation parameter, while the other two operation parameters remain unchanged, and stop performing the parameter adjustment until the adjusted second operation parameter is greater than a preset maximum value of the second operation parameter; wherein a one-dimensional parameter database is established once each adjustment of a second operating parameter.
Optionally, the database establishing module is specifically configured to establish a two-dimensional parameter database according to at least one-dimensional parameter database obtained by adjusting the second operation parameter at least once and a one-dimensional parameter database obtained by adjusting the first operation parameter; the two-dimensional parameter database includes: a plurality of one-dimensional parameter databases.
Optionally, the parameter adjusting module is specifically configured to, according to an adjustment amplitude corresponding to the third operation parameter, perform at least one adjustment on the third operation parameter, while the other two operation parameters remain unchanged, and stop performing the parameter adjustment until the adjusted third operation parameter is greater than a preset maximum value of the third operation parameter; wherein a two-dimensional parameter database is established once each adjustment of the third operating parameter.
Optionally, the database establishing module is specifically configured to establish a three-dimensional parameter database according to at least one two-dimensional parameter database obtained by adjusting the third operation parameter at least once and a two-dimensional parameter database obtained by adjusting the second operation parameter; the three-dimensional parameter database includes: a plurality of two-dimensional parameter databases.
In another aspect of the embodiments of the present invention, a computer device is provided, including: the method comprises a memory and a processor, wherein a computer program capable of running on the processor is stored in the memory, and when the computer program is executed by the processor, the steps of the method for correcting the parameters of the synchronous generator are realized.
In another aspect of the embodiments of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for correcting parameters of a synchronous generator according to any one of the above items.
The embodiment of the invention has the beneficial effects that:
according to the method, the device, the equipment and the storage medium for correcting the parameters of the synchronous generator, provided by the embodiment of the invention, the simulation parameters can be determined through the operation parameters and the parameter database, and the correction of the simulation parameters of the synchronous generator is realized based on the determined simulation parameters, so that the accuracy of simulation analysis and calculation of the generator is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a first flowchart of a method for correcting parameters of a synchronous generator according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for correcting parameters of a synchronous generator according to an embodiment of the present invention;
FIG. 3 is a logic diagram for establishing a parameter database according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of operating parameters of a synchronous generator according to an embodiment of the present invention;
FIG. 5 is a modified contrast plot for a synchronous engine provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of a device for correcting parameters of a synchronous generator according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Fig. 1 is a flowchart of a method for correcting parameters of a synchronous generator according to an embodiment of the present invention, where the method for correcting parameters of a synchronous generator may be executed by a computer. Referring to fig. 1, an embodiment of the invention provides a method for correcting parameters of a synchronous generator, which includes:
s1: and monitoring the running state of the synchronous generator and determining the running parameters of the synchronous generator.
In the process of the operation of the synchronous engine, the state of the synchronous generator can be monitored, and the operation parameters of the synchronous generator can be determined according to the monitored operation data.
S6: according to the operating parameters of the synchronous generator, a preset parameter database is adopted to determine simulation parameters corresponding to the operating parameters of the synchronous generator, and the parameter database comprises: a correspondence of at least one operating parameter and a simulation parameter.
After the operation parameters of the synchronous generator are determined, the operation parameters are added into a parameter database, and simulation parameters corresponding to the operation parameters of the synchronous generator can be obtained according to the corresponding relation between the operation parameters and the simulation parameters in the parameter database.
It should be noted that the simulation parameters may include: a steady state parameter, a transient parameter, and a sub-transient parameter. Wherein the steady state parameters may include at least one of: a direct-axis unsaturated synchronous reactor, a quadrature-axis unsaturated synchronous reactor and a direct-axis armature reaction reactor; the transient parameters may include at least one of: a direct-axis transient reactance, a direct-axis transient open-circuit time constant, a quadrature-axis transient reactance, and a quadrature-axis transient open-circuit time constant; the sub-transient parameters may include at least one of: a direct-axis sub-transient reactance, a direct-axis sub-transient time constant, a quadrature-axis sub-transient reactance, and a quadrature-axis sub-transient time constant.
S7: and correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters.
After the simulation parameters are obtained, the original values of the simulation parameters in the synchronous generator in the simulation analysis model are correspondingly modified into the values of the obtained simulation parameters, and the correction of the simulation parameters of the synchronous generator is completed. In the simulation analysis model, after the simulation parameters of the synchronous generator are corrected, the simulation analysis model can be adopted to perform simulation analysis on the synchronous generator information based on the corrected simulation parameters.
According to the method, the device, the equipment and the storage medium for correcting the parameters of the synchronous generator, provided by the embodiment of the invention, the simulation parameters can be determined through the operation parameters and the parameter database, and the correction of the simulation parameters of the synchronous generator is realized based on the determined simulation parameters, so that the accuracy of simulation analysis and calculation of the generator is improved.
Fig. 2 is a flowchart of a method for correcting parameters of a synchronous generator according to an embodiment of the present invention, where the method for correcting parameters of a synchronous generator can be executed by a computer. Referring to fig. 2, before determining the simulation parameters corresponding to the operating parameters of the synchronous generator by using a preset parameter database according to the operating parameters of the synchronous generator, the method may further include:
s2: and performing parameter identification on the preset initial operation parameters, and determining simulation parameters corresponding to the initial operation parameters.
It should be noted that, in consideration of the safe and stable operation of the power system, various dynamic disturbance tests of the large-scale generator are not easy to be performed, so that it is difficult to obtain a test curve reflecting the dynamic characteristics of the large-scale generator, and a standard response curve cannot be provided for parameter identification. Therefore, in the embodiment of the invention, the parameter identification is realized by simulating a large generator through a time-step finite element model of the generator. The time-step finite element model of the generator is based on the actual structure of the motor, can simulate the influence of nonlinear factors such as magnetic field distortion and magnetic circuit saturation in the generator on the large generator, and can also consider the influence of factors such as the skin effect of induced eddy currents in a generator rotor in a dynamic process on the large generator.
In the parameter identification process, the operation parameters of the time-step finite element model of the generator can be set as preset initial operation parameters, then the time-step finite element model of the generator is short-circuited, a standard response curve of the parameter identification can be obtained after the model is short-circuited, and simulation parameters corresponding to the initial operation parameters can be obtained according to the standard response curve of the parameter identification.
S3: and adjusting the initial operation parameters at least once according to the preset parameter adjustment amplitude, and stopping parameter adjustment until the adjusted operation parameters are greater than the preset maximum operation parameters.
The specific value of the parameter adjustment amplitude can be set according to the initial operating parameters of the synchronous generator. The parameter adjustment may be to sequentially increase a parameter adjustment range on the basis of the initial operation parameter, and when the adjusted operation parameter is greater than the preset maximum operation parameter, stop increasing the adjustment range, and complete the parameter adjustment.
S4: and respectively carrying out parameter identification on the at least one adjusted operating parameter, and determining a simulation parameter corresponding to the at least one adjusted operating parameter.
And performing parameter identification on at least one adjusted operating parameter, setting the operating parameter of the time-step finite element model of the generator as the adjusted operating parameter in the parameter identification process, then short-circuiting the time-step finite element model of the generator, acquiring a standard response curve of the parameter identification after the model is short-circuited, and acquiring a simulation parameter corresponding to the at least one adjusted operating parameter according to the standard response curve of the parameter identification.
S5: and establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter.
According to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, the relation of the simulation parameters changing along with the operation parameters can be obtained, and a parameter database is established according to the changing relation.
Fig. 3 is a logic diagram of establishing a parameter database according to an embodiment of the present invention, and referring to fig. 3, initial operating parameters according to an embodiment of the present invention include: the preset initial values of three kinds of operation parameters, the parameter adjustment range includes: the first operating parameter corresponds to the adjustment range.
Adjusting the initial operation parameter at least once according to the preset parameter adjustment amplitude until the adjusted operation parameter is greater than the preset maximum operation parameter, and stopping parameter adjustment, wherein the parameter adjustment comprises the following steps:
and adjusting the first operation parameter at least once according to the adjustment amplitude corresponding to the first operation parameter, and keeping the other two operation parameters unchanged until the adjusted first operation parameter is greater than the preset maximum value of the first operation parameter, and stopping parameter adjustment.
In particular, PABCThe parameter is a first operation parameter, delta P is an adjustment amplitude corresponding to the first operation parameter, A is the adjustment frequency of the first operation parameter, and A is an integer greater than or equal to 1; pMAXThe maximum operation parameter of the first operation parameter, the first initial operation parameter in the calculation process is 0:
PABC＝0+A×ΔP
when P is presentABCLess than PMAXWhen a is a + 1; when P is presentABCGreater than PMAXWhen so, the adjustment is stopped.
Establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, wherein the parameter database comprises:
according to the simulation parameters corresponding to the preset initial values of the first operation parameters and the simulation parameters corresponding to the adjusted first operation parameters, establishing a one-dimensional parameter database, wherein the one-dimensional parameter database comprises: the first operation parameter is corresponding to the simulation parameter.
In particular, P may be varied according to simulation parametersABCAnd establishing a one-dimensional parameter database according to the changed relation.
Optionally, the parameter adjustment magnitude further comprises: and the second operation parameter corresponds to the adjustment amplitude.
Adjusting the initial operation parameter at least once according to the preset parameter adjustment range until the adjusted operation parameter is greater than the preset maximum operation parameter, and stopping adjusting the parameter, further comprising:
adjusting the second operation parameter at least once according to the adjustment amplitude corresponding to the second operation parameter, and keeping the other two operation parameters unchanged until the adjusted second operation parameter is larger than the preset maximum value of the second operation parameter, and stopping parameter adjustment; wherein a one-dimensional parameter database is established once each adjustment of a second operating parameter.
Specifically, QABCThe second operation parameter is delta Q, the adjustment amplitude corresponding to the second operation parameter is delta Q, B is the adjustment frequency of the second operation parameter, and B is an integer greater than or equal to 1; qMAXThe maximum operation parameter of the second operation parameter is obtained, and the second initial operation parameter in the calculation process is 0:
QABC＝0+B×ΔQ
when Q isABCLess than QMAXWhen B is B + 1; when Q isABCGreater than QMAXWhen so, the adjustment is stopped.
It should be noted that Q is used to adjust the second operating parameterABCThe establishment of the one-dimensional parameter database is repeated once every change.
Establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, wherein the parameter database comprises:
establishing a two-dimensional parameter database according to at least one-dimensional parameter database obtained by adjusting the second operation parameters at least once and the one-dimensional parameter database obtained by adjusting the first operation parameters; the two-dimensional parameter database includes: a plurality of one-dimensional parameter databases.
In particular, P may be varied according to simulation parametersABCAnd QABCAnd establishing a two-dimensional parameter database according to the changed relation.
Optionally, the parameter adjustment magnitude further comprises: and the adjustment amplitude corresponding to the third operation parameter.
Adjusting the initial operation parameter at least once according to the preset parameter adjustment range until the adjusted operation parameter is greater than the preset maximum operation parameter, and stopping adjusting the parameter, further comprising:
adjusting the third operation parameter at least once according to the adjustment amplitude corresponding to the third operation parameter, and keeping the other two operation parameters unchanged until the adjusted third operation parameter is larger than the preset maximum value of the third operation parameter, and stopping parameter adjustment; wherein a two-dimensional parameter database is established once each adjustment of the third operating parameter.
Specifically, UABCThe third operation parameter is delta U, the adjustment amplitude corresponding to the third operation parameter is delta U, the adjustment frequency of the third operation parameter is C, and the C is an integer greater than or equal to 1; u shapeNFor the rated operating parameters of the synchronous generator, the third initial operating parameter in the calculation process is 90% UN：
UABC＝90％UN+C×ΔU
When U is turnedABCLess than 110% UNWhen, C ═ C + 1; when U is turnedABCGreater than 110% UNWhen so, the adjustment is stopped.
It should be noted that, when the third operating parameter is adjusted, U isABCRepeating the establishment of the two-dimensional parameter database once every change
Establishing a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter, wherein the parameter database comprises:
establishing a three-dimensional parameter database according to at least one two-dimensional parameter database obtained by adjusting the third operation parameter at least once and the two-dimensional parameter database obtained by adjusting the second operation parameter; the three-dimensional parameter database includes: a plurality of two-dimensional parameter databases.
In particular, P may be varied according to simulation parametersABC、QABCAnd UABCAnd establishing a three-dimensional parameter database according to the changed relation.
Wherein, the simulation parameters comprise: direct-axis unsaturated synchronous reactance xdQuadrature axis unsaturated synchronous reactance xqDirect axis armature reaction reactance xadD-axis transient reactance xd’D-axis sub-transient reactance xd”Time constant T of transient open circuit of straight axisd0’Time constant T of direct axis sub-transientd0”Quadrature axis transient reactance xq’Quadrature axis sub-transient reactance xq”Quadrature axis transient open circuit time constant Tq0’Quadrature axis time constant Tq0”。
The simulation parameters jointly form a parameter matrix DABC。
As explained below by a specific example, in the process of actually performing parameter database establishment, the following steps can be performed:
step 1: let A be 0, B be 0, C be 0, PABC＝0，QABC＝0，UABC＝90％UNAnd executing the step 2. Step 1 is to input initial operation parameters and adjustment times corresponding to the initial operation parameters.
Step 2: let PABCStep 3 is performed as 0+ a × Δ P. Step 2 is adjusting the value of the first operating parameter.
And step 3: when P is presentABCLess than PMAXIf yes, executing step 4; when P is presentABCGreater than PMAXThen step 8 is performed. Step 3 is to PABCAnd PMAXThe magnitude relationship of (2) is judged.
And 4, step 4: input PABC、QABC、UABCAnd step 5 is executed. Step 4 is to input the adjusted operating parameters.
And 5: performing parameter identification, obtaining various simulation parameters, and obtaining a parameter matrix D according to the various simulation parametersABCStep 6 is executed. Step 5 is to step 4And identifying the parameters of the input operation parameters.
Step 6: output DABCStep 7 is executed. The output of step 6 is a parameter matrix D corresponding to the one-dimensional parameter databaseABC。
And 7: let a be a +1, perform step 2. And 7, increasing the adjusting times corresponding to the first operation parameter.
And 8: let a be 0 and B be B +1, go to step 9. And 8, setting the adjusting times corresponding to the first operation parameters to be 0, and increasing the adjusting times of the second operation parameters.
And step 9: let QBCStep 10 is performed when the value is 0+ B × Δ Q. Step 9 is adjusting the value of the second operating parameter.
Step 10: when Q isABCLess than QMAXIf so, executing the step 2; when Q isABCGreater than QMAXThen step 11 is performed. Step 10 is to QABCAnd QMAXThe magnitude relationship of (2) is judged.
Step 11: let a be 0, B be 0, and C be C +1, and execute step 12. And 11, setting the adjusting times corresponding to the first operating parameter and the second operating parameter to be 0, and increasing the adjusting times of the third operating parameter.
Step 12: let UABC＝90％UN+ C × Δ U, step 13 is performed. Step 12 is adjusting the value of the third operating parameter.
Step 13: when U is turnedABCLess than 110% UNIf so, executing the step 2; when U is turnedABCGreater than 110% UNAnd (4) ending. Step 13 is to UABCAnd 110% UNThe magnitude relationship of (2) is judged.
Finally obtained parameter matrix DABCIs a parameter database.
Fig. 4 is a schematic view of operation parameters of a synchronous generator according to an embodiment of the present invention, and referring to fig. 4, the operation parameters of the synchronous generator according to the embodiment of the present invention include: active power of the synchronous generator, reactive power of the synchronous generator and terminal voltage of the synchronous generator.
In which the active power 11 of the synchronous generator is of the first typeOperating parameter PABCThe reactive power 12 of the synchronous generator is a second operating parameter QABCThe terminal voltage 13 of the synchronous generator is a third operating parameter UABC。
Wherein, PABC、QABC、UABCThe following conditions are satisfied:
0≤PABC≤PMAX
0≤QABC≤QMAX
90％UN≤UABC≤110％UN
wherein, PABCMay be, for example, 0, and the maximum operating parameters are: pMAX；QABCMay be, for example, 0, and the maximum operating parameters are: pMAX；UABCMay be, for example, 90% UNThe maximum operating parameters are: 110% UN。
The effect of a correction of a synchronous generator is explained below by way of example. Fig. 5 is a modified comparison graph of a synchronous engine according to an embodiment of the present invention, referring to fig. 5, in an embodiment of the present invention, the modified comparison graph of the synchronous engine includes: a relative power angle curve 41, a speed deviation curve 42, an electromagnetic power curve 43, a reactive power curve 44 and an exciting current curve 45.
Wherein, the ordinate of the relative power angle curve 41 is the relative power angle of the generator, and the abscissa is the cycle; the ordinate of the speed deviation curve 42 is the generator speed deviation, and the abscissa is the cycle; the ordinate of the electromagnetic power curve 43 is the electromagnetic power of the generator, and the abscissa is the cycle; the ordinate of the reactive power curve 44 is the reactive power of the generator, and the abscissa is the cycle; the ordinate of the excitation current curve 45 is the generator excitation current, and the abscissa is the cycle.
In fig. 5, the solid line is the original parameter, the dotted line is the simulation parameter obtained by modifying after the parameter identification, and the operation result of the simulation parameter obtained by modifying after the parameter identification is closer to the actual operation state than the operation result of the original parameter, so that the simulation accuracy of the system is improved.
The partial three-dimensional model database established in fig. 4 is as follows:
in the table, when the active power is 150MW, the direct axis is not saturated with the synchronous reactance xdIs 1.438, quadrature axis unsaturated synchronous reactance xqIs 1.232, direct axis armature reaction reactance xadIs 1.322, direct transient reactance xd’Is 0.222, direct axis sub-transient reactance xd”Is 0.132, and has a direct-axis transient open-circuit time constant Td0’6.065, direct axis sub-transient time constant Td0”Is 0.083, quadrature axis transient reactance xq’Is 0.321, quadrature axis sub-transient reactance xq”Is 0.143, quadrature axis transient open circuit time constant Tq0’Is 0.413, quadrature axis time constant Tq0”Was 0.087.
Accordingly, there are corresponding values for various simulation parameters when the active power is 180MW, 210MW, 240MW, 270MW, and 300 MW.
The above is only a specific example of the method for correcting the parameters of the synchronous generator provided by the embodiment of the present invention, and in the actual application process, the values of the operating parameters and the simulation parameters are not limited to the above, and may be other values, which are not described herein again.
Fig. 6 is a schematic diagram of a device for correcting parameters of a synchronous generator according to an embodiment of the present invention, and referring to fig. 6, the embodiment of the present invention provides a device for correcting parameters of a synchronous generator, including:
and the monitoring module 21 is configured to monitor an operation state of the synchronous generator and determine an operation parameter of the synchronous generator.
The parameter operation module 25 is configured to determine, according to the operating parameters of the synchronous generator, simulation parameters corresponding to the operating parameters of the synchronous generator by using a preset parameter database, where the parameter database includes: a correspondence of at least one operating parameter and a simulation parameter.
And the parameter correcting module 26 is used for correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters.
Optionally, the apparatus further comprises:
the parameter identification module 22 is used for performing parameter identification on preset initial operation parameters and determining simulation parameters corresponding to the initial operation parameters; and the simulation system is also used for respectively carrying out parameter identification on the at least one adjusted operation parameter and determining a simulation parameter corresponding to the at least one adjusted operation parameter.
And the parameter adjusting module 23 is configured to adjust the initial operating parameter at least once according to a preset parameter adjustment range, and stop performing parameter adjustment until the adjusted operating parameter is greater than a preset maximum operating parameter.
And the database establishing module 24 is configured to establish a parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter.
Optionally, the parameter adjusting module 23 is specifically configured to, according to an adjustment amplitude corresponding to the first operation parameter, perform at least one adjustment on the first operation parameter, and maintain the other two operation parameters unchanged until the adjusted first operation parameter is greater than a preset maximum value of the first operation parameter, and then stop performing the parameter adjustment.
Optionally, the database establishing module 24 is specifically configured to establish a one-dimensional parameter database according to the simulation parameter corresponding to the preset initial value of the first operation parameter and the simulation parameter corresponding to the at least one adjusted first operation parameter, where the one-dimensional parameter database includes: the first operation parameter is corresponding to the simulation parameter.
Optionally, the parameter adjusting module 23 is specifically configured to, according to an adjustment amplitude corresponding to the second operation parameter, perform at least one adjustment on the second operation parameter, while the other two operation parameters remain unchanged, and stop performing the parameter adjustment until the adjusted second operation parameter is greater than a preset maximum value of the second operation parameter; wherein a one-dimensional parameter database is established once each adjustment of a second operating parameter.
Optionally, the database establishing module 24 is specifically configured to establish a two-dimensional parameter database according to at least one-dimensional parameter database obtained by adjusting the second operation parameter at least once and a one-dimensional parameter database obtained by adjusting the first operation parameter; the two-dimensional parameter database includes: a plurality of one-dimensional parameter databases.
Optionally, the parameter adjusting module 23 is specifically configured to, according to an adjustment amplitude corresponding to the third operation parameter, perform at least one adjustment on the third operation parameter, while the other two operation parameters remain unchanged, and stop performing parameter adjustment until the adjusted third operation parameter is greater than a preset maximum value of the third operation parameter; wherein a two-dimensional parameter database is established once each adjustment of the third operating parameter.
Optionally, the database establishing module 24 is specifically configured to establish a three-dimensional parameter database according to at least one two-dimensional parameter database obtained by adjusting the third operation parameter at least once and a two-dimensional parameter database obtained by adjusting the second operation parameter; the three-dimensional parameter database includes: a plurality of two-dimensional parameter databases.
Fig. 7 is a schematic diagram of a computer device according to an embodiment of the present invention, and referring to fig. 7, an embodiment of the present invention provides a computer device, including: the memory 31 and the processor 32, wherein the memory 31 stores a computer program capable of running on the processor, and the processor 32 implements the steps of the method for correcting the parameters of the synchronous generator according to any one of the above items when the processor executes the computer program.
In another aspect of the embodiments of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for correcting parameters of a synchronous generator according to any one of the above items.
The device, the equipment and the storage medium for correcting the parameters of the synchronous generator provided by the embodiment of the invention can determine the simulation parameters through the operation parameters and the parameter database, and realize the correction of the simulation parameters of the synchronous generator based on the determined simulation parameters, thereby improving the accuracy of simulation analysis and calculation of the generator.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of modifying a parameter of a synchronous generator, comprising:
monitoring the running state of the synchronous generator and determining the running parameters of the synchronous generator;
according to the operating parameters of the synchronous generator, a preset parameter database is adopted to determine simulation parameters corresponding to the operating parameters of the synchronous generator, and the parameter database comprises: a correspondence of at least one operating parameter and a simulation parameter;
and correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters.
2. The method of claim 1, wherein before determining the simulation parameters corresponding to the operating parameters of the synchronous generator according to the operating parameters of the synchronous generator by using a preset parameter database, the method further comprises:
performing parameter identification on a preset initial operation parameter, and determining a simulation parameter corresponding to the initial operation parameter;
adjusting the initial operation parameter at least once according to a preset parameter adjustment amplitude, and stopping parameter adjustment until the adjusted operation parameter is greater than a preset maximum operation parameter;
respectively carrying out parameter identification on the at least one adjusted operation parameter, and determining a simulation parameter corresponding to the at least one adjusted operation parameter;
and establishing the parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter.
3. The method of claim 2, wherein the initial operating parameters comprise: the preset initial values of three kinds of operation parameters, the parameter adjustment range includes: the adjustment amplitude corresponding to the first operation parameter;
and adjusting the initial operation parameter at least once according to a preset parameter adjustment amplitude until the adjusted operation parameter is greater than a preset maximum operation parameter, and stopping parameter adjustment, wherein the method comprises the following steps:
adjusting the first operation parameter at least once according to the adjustment amplitude corresponding to the first operation parameter, and keeping the other two operation parameters unchanged until the adjusted first operation parameter is larger than the preset maximum value of the first operation parameter, and stopping parameter adjustment;
the establishing of the parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter includes:
establishing a one-dimensional parameter database according to the simulation parameters corresponding to the preset initial values of the first operation parameters and the simulation parameters corresponding to the adjusted first operation parameters, wherein the one-dimensional parameter database comprises: and the first operation parameter corresponds to the simulation parameter.
4. The method of claim 3, wherein the parameter adjustment magnitude further comprises: the adjustment amplitude corresponding to the second operation parameter;
the adjusting the initial operation parameter at least once according to the preset parameter adjusting range, and stopping adjusting the parameter until the adjusted operation parameter is greater than the preset maximum operation parameter, further comprising:
adjusting the second operation parameter at least once according to the adjustment amplitude corresponding to the second operation parameter, and keeping the other two operation parameters unchanged until the adjusted second operation parameter is larger than the preset maximum value of the second operation parameter, and stopping parameter adjustment; wherein the one-dimensional parameter database is established once each time the second operating parameter is adjusted;
the establishing of the parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter includes:
establishing a two-dimensional parameter database according to at least one-dimensional parameter database obtained by adjusting the second operation parameters at least once and the one-dimensional parameter database obtained by adjusting the first operation parameters; the two-dimensional parameter database includes: a plurality of said one-dimensional parameter databases.
5. The method of claim 4, wherein the parameter adjustment magnitude further comprises: the adjustment amplitude corresponding to the third operation parameter;
the adjusting the initial operation parameter at least once according to the preset parameter adjusting range, and stopping adjusting the parameter until the adjusted operation parameter is greater than the preset maximum operation parameter, further comprising:
adjusting the third operation parameter at least once according to the adjustment amplitude corresponding to the third operation parameter, and keeping the other two operation parameters unchanged until the adjusted third operation parameter is larger than the preset maximum value of the third operation parameter, and stopping parameter adjustment; wherein said two-dimensional parameter database is established once each adjustment of said third operating parameter;
the establishing of the parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter includes:
establishing a three-dimensional parameter database according to at least one two-dimensional parameter database obtained by adjusting the third operation parameter at least once and the two-dimensional parameter database obtained by adjusting the second operation parameter; the three-dimensional parameter database includes: a plurality of said two-dimensional parameter databases.
6. The method of any one of claims 3-5, wherein the operating parameters of the synchronous generator comprise: active power of the synchronous generator, reactive power of the synchronous generator, and terminal voltage of the synchronous generator.
7. A device for correcting parameters of a synchronous generator, comprising:
the monitoring module is used for monitoring the running state of the synchronous generator and determining the running parameters of the synchronous generator;
the parameter operation module is used for determining simulation parameters corresponding to the operating parameters of the synchronous generator by adopting a preset parameter database according to the operating parameters of the synchronous generator, and the parameter database comprises: a correspondence of at least one operating parameter and a simulation parameter;
and the parameter correction module is used for correcting the simulation parameters of the synchronous generator in the simulation analysis model according to the simulation parameters.
8. The apparatus of claim 7, wherein said apparatus further comprises:
the parameter identification module is used for carrying out parameter identification on a preset initial operation parameter and determining a simulation parameter corresponding to the initial operation parameter; the simulation system is also used for respectively carrying out parameter identification on the at least one adjusted operation parameter and determining a simulation parameter corresponding to the at least one adjusted operation parameter;
the parameter adjusting module is used for adjusting the initial operation parameters at least once according to the preset parameter adjusting amplitude, and stopping parameter adjustment until the adjusted operation parameters are larger than the preset maximum operation parameters;
and the database establishing module is used for establishing the parameter database according to the simulation parameters corresponding to the initial operation parameters and the simulation parameters corresponding to the at least one adjusted operation parameter.
9. A computer device, comprising: memory, a processor, in which a computer program is stored which is executable on the processor, characterized in that the processor realizes the steps of the method according to any of the preceding claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
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