CN114362135B - Parameter setting method and system for power system stabilizer - Google Patents
Parameter setting method and system for power system stabilizer Download PDFInfo
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Abstract
The invention discloses a parameter setting method and a parameter setting system of a power system stabilizer, wherein, firstly, the related parameters of a power system and a generator before and after the change of a difference adjustment coefficient are obtained, and the uncompensated phase frequency characteristic variation of a unit caused by the change of the difference adjustment coefficient is calculated under different frequencies; then, acquiring the test phase frequency characteristic under the original difference adjustment coefficient, and calculating the theoretical value of the phase frequency characteristic of the unit after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit; and finally, judging whether the hysteresis rotation speed angle of each additional moment is in a reasonable range under the initial power system stabilizer parameters based on the theoretical value of the phase frequency characteristic of the unit after the difference adjustment coefficient is changed, and correcting the power system stabilizer parameters based on a judgment result. The problems of uncompensated phase frequency characteristics of a unit obtained by re-performing field tests, low PSS parameter configuration efficiency and high cost are solved.
Description
Technical Field
The invention relates to the technical field of machine network coordination of power systems, in particular to a parameter setting method and system of a power system stabilizer.
Background
The statements in this section merely relate to the background of the present disclosure and may not necessarily constitute prior art.
The Power System Stabilizer (PSS) is an important measure for increasing system damping, suppressing low-frequency oscillation, and improving system stability, and has been widely used. In particular, the output signal of the PSS is superimposed on the main control loop of the automatic voltage regulator, the output signal of which is generally denoted as DeltaU pss The method comprises the steps of carrying out a first treatment on the surface of the The uncompensated phase frequency characteristic of the machine set refers to electromagnetic torque delta T e Relative to PSS output signal DeltaU pss Is described as the phase frequency characteristic of
PSS link self phase frequency characteristic->
And->
Under the combined action, the PSS can generate positive damping torque to inhibit low-frequency oscillation of the unit, so that the uncompensated phase frequency characteristic of the unit has obvious influence on the PSS; when the unit is put into operation or the software and hardware of the excitation system are modified, the uncompensated phase frequency characteristic of the unit is usually acquired through field test, and the PSS parameters of the unit are further configured.
However, with the development of extra-high voltage and new energy, the requirement of the power grid for the additional difference adjustment coefficient of the unit is continuously changed, and after the difference adjustment coefficient is changed, if the field test is performed again to obtain the uncompensated phase frequency characteristic of the unit and configure the PSS parameter, the efficiency is low and the cost is high.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a parameter setting method and system for a power system stabilizer, which are used for evaluating the validity of the original PSS parameters and further modifying the PSS parameters after the additional adjustment difference coefficient of a unit is changed.
In a first aspect, the present invention provides a method for setting parameters of a power system stabilizer;
a method of parameter tuning of a power system stabilizer, comprising:
acquiring related parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating uncompensated phase frequency characteristic variation of the unit caused by the change of the difference adjustment coefficient under different frequencies;
acquiring test phase frequency characteristics under an original difference adjustment coefficient, and calculating a theoretical value of the phase frequency characteristics of the unit after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit;
judging whether the hysteresis rotation speed angle of each additional moment is in a reasonable range under the parameters of the stabilizer of the initial power system based on the theoretical value of the phase frequency characteristic of the unit after the difference adjustment coefficient is changed;
and based on the judging result, when the additional torque lag rotating speed angle is not in a reasonable range, correcting the parameters of the stabilizer of the electric power system until all the additional torque lag rotating speed angles are in the reasonable range.
Further, at a certain frequency, the theoretical value of the unit phase frequency characteristic after the variation of the difference adjustment coefficient is the sum of the uncompensated phase frequency characteristic variation of the unit at the corresponding frequency and the experimental phase frequency characteristic value at the original difference adjustment coefficient.
Further, under a certain frequency, the unit uncompensated phase frequency characteristic variation is the difference between the unit uncompensated phase frequency characteristic of the generator unit under the original difference adjustment coefficient and the unit uncompensated phase frequency characteristic under the new difference adjustment coefficient.
Further, the relevant parameters of the generator include: the method comprises the steps of a generator fundamental wave angular frequency value, an inertia time constant of a generator, a damping coefficient of the generator, a generator d-axis synchronous reactance, a generator q-axis synchronous reactance, a generator d-axis transient reactance, a coupling reactance between the generator and an infinite power system, a q-axis component of a machine end current, a generator end voltage, a component of the generator end voltage on a d-axis, a component of the generator end voltage on a q-axis, a generator sub-transient potential, an imaginary potential after the generator q-axis synchronous reactance, a generator d-axis transient reactance including the coupling reactance and a generator q-axis synchronous reactance including the coupling reactance;
the parameters related to the power system include the power system voltage and the angle between the power system voltage and the q-axis.
In a second aspect, the present invention provides a parameter tuning system for a power system stabilizer;
a parameter tuning system for a power system stabilizer, comprising:
the compensation-free phase frequency characteristic change amount calculation module is used for obtaining relevant parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating the compensation-free phase frequency characteristic change amount of the unit caused by the change of the difference adjustment coefficient under different frequencies;
the unit phase frequency characteristic theoretical value calculation module is used for acquiring the test phase frequency characteristic under the original difference adjustment coefficient, and calculating the unit phase frequency characteristic theoretical value after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit;
the additional moment hysteresis rotation speed angle judging module is used for judging whether each additional moment hysteresis rotation speed angle is in a reasonable range or not under the parameters of the initial power system stabilizer based on the theoretical value of the phase frequency characteristic of the unit after the adjustment difference coefficient is changed;
and the power system stabilizer parameter correction module is used for correcting the power system stabilizer parameters until all the additional moment lag rotating speed angle ranges are within a reasonable range when the additional moment lag rotating speed angle is not within the reasonable range based on the judgment result.
Further, at a certain frequency, the theoretical value of the unit phase frequency characteristic after the variation of the difference adjustment coefficient is the sum of the uncompensated phase frequency characteristic variation of the unit at the corresponding frequency and the experimental phase frequency characteristic value at the original difference adjustment coefficient.
Further, under a certain frequency, the unit uncompensated phase frequency characteristic variation is the difference between the unit uncompensated phase frequency characteristic of the generator unit under the original difference adjustment coefficient and the unit uncompensated phase frequency characteristic under the new difference adjustment coefficient.
Further, the relevant parameters of the generator include: the method comprises the steps of a generator fundamental wave angular frequency value, an inertia time constant of a generator, a damping coefficient of the generator, a generator d-axis synchronous reactance, a generator q-axis synchronous reactance, a generator d-axis transient reactance, a coupling reactance between the generator and an infinite power system, a q-axis component of a machine end current, a generator end voltage, a component of the generator end voltage on a d-axis, a component of the generator end voltage on a q-axis, a generator sub-transient potential, an imaginary potential after the generator q-axis synchronous reactance, a generator d-axis transient reactance including the coupling reactance and a generator q-axis synchronous reactance including the coupling reactance;
the parameters related to the power system include the power system voltage and the angle between the power system voltage and the q-axis.
In a third aspect, the present invention also provides an electronic device, including:
a memory for non-transitory storage of computer readable instructions; and
a processor for executing the computer-readable instructions,
wherein the computer readable instructions, when executed by the processor, perform the method of the first aspect described above.
In a fourth aspect, the invention also provides a storage medium storing non-transitory computer readable instructions, wherein the instructions of the method of the first aspect are executed when the non-transitory computer readable instructions are executed by a computer.
Compared with the prior art, the invention has the beneficial effects that:
the parameter setting method of the power system stabilizer provided by the invention realizes that after the additional difference adjustment coefficient of the unit is changed, the validity of the original PSS parameter is evaluated, the PSS parameter is further modified, and the problems of uncompensated phase frequency characteristics of the unit, low efficiency of configuring the PSS parameter and high cost caused by re-performing field test are solved.
Additional aspects of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
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The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a flowchart of a parameter setting method of a power system stabilizer according to a first embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms also are intended to include the plural forms, and furthermore, it is to be understood that the terms "comprises" and "comprising" and any variations thereof are intended to cover non-exclusive inclusions, such as, for example, processes, methods, systems, products or devices that comprise a series of steps or units, are not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or inherent to such processes, methods, products or devices.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
All data acquisition in the embodiment is legal application of the data on the basis of meeting laws and regulations and agreements of users.
Example 1
The embodiment provides a parameter setting method of a power system stabilizer;
as shown in fig. 1, a parameter setting method of a power system stabilizer, which realizes automatic and accurate modification of PSS parameters when a unit adjustment difference coefficient is changed, includes:
step 1, acquiring relevant parameters of a power system and a generator, and calculating uncompensated phase frequency characteristic variation of a unit caused by variation of a difference adjustment coefficient under different frequencies, wherein the method comprises the following steps of:
step 101, obtaining relevant parameters of a power system and a generator.
Specifically, the generator-related parameters include: angular frequency value omega of fundamental wave of generator 0 Inertia time constant M of the generator, damping coefficient D of the generator and D-axis synchronous reactance x of the generator d Q-axis synchronous reactance x of generator q D-axis transient reactance x of generator d ' coupling reactance x between generator and infinite power system e Q-axis component i of machine side current q0 Generator terminal voltage U t0 Component U of generator terminal voltage on d-axis td0 Component U of generator terminal voltage on q-axis tq0 Sub-transient potential E of generator q0 ' generator q-axis synchronous reactance x q Post imaginary potential E Q0 Generator d-axis transient reactance x 'including junction reactance' dΣ And generator q-axis synchronous reactance x including coupled reactance q∑ 。
The power system related parameters include: power system voltage V s And the angle delta between the power system voltage and the q axis 0 。
Step 102, calculating an original adjustment difference coefficient set value X based on related parameters of the power system and the generator c1 And the generator set has uncompensated phase frequency characteristics under different frequencies of 0.1-2.0 HZ, and specifically, a point is taken at intervals of 0.1HZ within the range of 0.1-2.0 HZ.
First, the exciting voltage per unit value u in the exciting per unit system is used fd Conversion by X ad Per unit value E under per unit system fd ：
Wherein I is FD0 For rotor current corresponding to rated voltage on empty air gap line of synchronous machine, R FD For the known value of the rotor resistance, u fdbase For the reference value of exciting voltage under the exciting per unit system, the reference value is recorded
Represents the exciting voltage U under the per unit exciting system fd Conversion to X ad E under per unit system fd Coefficient when the time is short.
Then, the original difference adjustment coefficient set value X is calculated c1 Uncompensated phase frequency characteristic of lower generator set at 0.1-2.0 HZ
Wherein, the calculation formula of the uncompensated phase frequency characteristic of the unit is as follows,
wherein K is A Indicating the amplification factor of the excitation system, wherein the value is taken as the amplification factor and K of the control part of the excitation system in the excitation system modeling report 7 Is a product of (2); omega 0 For fundamental angular frequency value, omega 0 Is a named value, in rad/s; m is the inertia time constant of the generator, M is a famous value, and the unit is S; d is a damping coefficient, and D is dimensionless; k (K) 1 ～K' 6 The expression of (2) is as follows:
K' 5 ＝K 5 +K 11 ·X c
K' 6 ＝K 6 +K 12 ·X c
wherein x is d The d-axis synchronous reactance of the generator is achieved; x is x q Synchronous reactance for the q-axis of the generator; x is x d ' is the generator d-axis transient reactance; x is x e A coupling reactance between the generator and an infinite power system; i.e q0 Is the q-axis component of the machine side current; u (U) t0 Is the generator terminal voltage; u (U) td0 The component of the generator terminal voltage on the d axis; u (U) tq0 A component of the generator terminal voltage on the q-axis; e (E) q0 ' is the generator sub-transient potential; v (V) s Is the power system voltage; e (E) Q0 Is the reactance x q A virtual potential of the rear; x's' dΣ A generator d-axis transient reactance including a junction reactance;x q∑ q-axis synchronous reactance for a generator including a linked reactance; x is x d 、x q 、x d ′、x e 、i q0 、U t0 、U td0 、U tq0 、E q0 ′、V s 、EQ0、x' dΣ 、x q∑ All are X ad A per unit value under the per unit system; delta 0 Delta is the included angle between the voltage of the power system and the q axis 0 Is a named value, the unit is rad; x is X c Xc is dimensionless for the difference adjustment coefficient.
Step 103, calculating a new set adjustment difference coefficient value X c2 Uncompensated phase frequency characteristics of lower generator set at different frequencies of 0.1-2.0 HZ (f=0.1 HZ,0.2HZ, …,2.0 HZ)
The calculation method is the same as step 102.
104, calculating the uncompensated phase frequency characteristic variation quantity of the motor unit caused by the variation of the difference adjustment coefficient under the condition of 0.1-2.0 HZ
Specifically, at a certain frequency, the variation of the uncompensated phase frequency characteristic of the generator set is the difference between the uncompensated phase frequency characteristic of the generator set under the original tuning difference coefficient and the uncompensated phase frequency characteristic of the generator set under the new tuning difference coefficient, that is, the calculation formula of the variation of the uncompensated phase frequency characteristic of the generator set under the frequency f is
Step 2, obtaining the test phase frequency characteristic under the original difference adjustment coefficient, and calculating the theoretical value of the phase frequency characteristic of the unit after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit
Specifically, at a certain frequency, the theoretical value of the phase frequency characteristic of the unit after the variation coefficient is changed is thatThe sum of the uncompensated phase frequency characteristic variation of the unit under the frequency and the test phase frequency characteristic value under the original difference adjustment coefficient, namely, the calculation formula of the theoretical value of the phase frequency characteristic of the unit after the change of the difference adjustment coefficient under the frequency f is as follows
Wherein,,
in order to obtain the test phase frequency characteristic value under the original difference adjustment coefficient from the PSS test report of the unit, the method comprises the following steps of +.>
Is different in value.
Step 5, judging whether each additional moment hysteresis rotation speed angle under all frequencies is in a reasonable range or not under the parameters of the initial power system stabilizer based on the phase frequency characteristic theoretical value of the unit after the difference adjustment coefficient is changed; if yes, maintaining the parameters of the initial power system stabilizer unchanged; otherwise, the parameters of the stabilizer of the power system are corrected until the angle range of the additional moment hysteresis rotation speed under all frequencies is within a reasonable range.
Specifically, the compensation angle margin is set in consideration of errors in the phase frequency characteristics after the calculated adjustment difference is changed
Compensating angle margin->
Taken as 10 °; calculating the theoretical value +.about.of the unit phase frequency characteristic of the initial PSS parameter after the difference adjustment coefficient is changed at each frequency f>
Under the condition of additional moment lag rotation speed angle +.>
Whether or not to be within reasonable range->
An inner part; if yes, maintaining the original parameters unchanged; if the torque hysteresis rotation speed is not met, the PSS parameters are modified until the additional torque hysteresis rotation speed angles at all frequencies are within a reasonable range; wherein (1)>
Setting an angle range value specified in a test guideline for a DL/T1231 power system stabilizer at a frequency f; />
Is->
And the sum of the angles after the PSS itself,
wherein,,
the phase frequency characteristic of the PSS link is shown.
The method of the invention realizes the evaluation of the validity of the original PSS parameters and further modifies the PSS parameters after the additional difference adjustment coefficient of the unit is changed, and solves the problems of uncompensated phase frequency characteristics of the unit obtained by re-performing field test, low PSS parameter configuration efficiency and high cost.
Example two
The embodiment provides a parameter setting system of a power system stabilizer;
a parameter tuning system for a power system stabilizer, comprising:
the compensation-free phase frequency characteristic change amount calculation module is used for obtaining relevant parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating the compensation-free phase frequency characteristic change amount of the unit caused by the change of the difference adjustment coefficient under different frequencies;
the unit phase frequency characteristic theoretical value calculation module is used for acquiring the test phase frequency characteristic under the original difference adjustment coefficient, and calculating the unit phase frequency characteristic theoretical value after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit;
the additional moment hysteresis rotation speed angle judging module is used for judging whether each additional moment hysteresis rotation speed angle is in a reasonable range or not under the parameters of the initial power system stabilizer based on the theoretical value of the phase frequency characteristic of the unit after the adjustment difference coefficient is changed;
and the power system stabilizer parameter correction module is used for correcting the power system stabilizer parameters until all the additional moment lag rotating speed angle ranges are within a reasonable range when the additional moment lag rotating speed angle is not within the reasonable range based on the judgment result. Specifically configured to: if the additional moment hysteresis rotation speed angle is in a reasonable range, maintaining the parameters of the initial power system stabilizer unchanged; otherwise, the parameters of the stabilizer of the power system are corrected until the angle range of the hysteresis rotating speed of all the additional torque is within a reasonable range.
And under a certain frequency, the theoretical value of the phase frequency characteristic of the unit after the difference adjustment coefficient is changed is the sum of the uncompensated phase frequency characteristic variation quantity of the unit under the corresponding frequency and the test phase frequency characteristic value under the original difference adjustment coefficient.
And under a certain frequency, the unit uncompensated phase frequency characteristic variation is the difference value between the unit uncompensated phase frequency characteristic of the generator unit under the original difference adjustment coefficient and the unit uncompensated phase frequency characteristic under the new difference adjustment coefficient under the corresponding frequency.
Wherein, the relevant parameters of the generator include: the method comprises the steps of a generator fundamental wave angular frequency value, an inertia time constant of a generator, a damping coefficient of the generator, a generator d-axis synchronous reactance, a generator q-axis synchronous reactance, a generator d-axis transient reactance, a coupling reactance between the generator and an infinite power system, a q-axis component of a machine end current, a generator end voltage, a component of the generator end voltage on a d-axis, a component of the generator end voltage on a q-axis, a generator sub-transient potential, an imaginary potential after the generator q-axis synchronous reactance, a generator d-axis transient reactance including the coupling reactance and a generator q-axis synchronous reactance including the coupling reactance; the parameters related to the power system include the power system voltage and the angle between the power system voltage and the q-axis
It should be noted that the above modules correspond to the steps in the first embodiment, and the above modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to the disclosure in the first embodiment. It should be noted that the modules described above may be implemented as part of a system in a computer system, such as a set of computer-executable instructions.
The foregoing embodiments are directed to various embodiments, and details of one embodiment may be found in the related description of another embodiment.
The proposed system may be implemented in other ways. For example, the system embodiments described above are merely illustrative, such as the division of the modules described above, are merely a logical function division, and may be implemented in other manners, such as multiple modules may be combined or integrated into another system, or some features may be omitted, or not performed.
Example III
The embodiment also provides an electronic device, including: one or more processors, one or more memories, and one or more computer programs; wherein the processor is coupled to the memory, the one or more computer programs being stored in the memory, the processor executing the one or more computer programs stored in the memory when the electronic device is running, to cause the electronic device to perform the method of the first embodiment.
It should be understood that in this embodiment, the processor may be a central processing unit CPU, and the processor may also be other general purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate array FPGA or other programmable logic device, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include read only memory and random access memory and provide instructions and data to the processor, and a portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software.
The method in the first embodiment may be directly implemented as a hardware processor executing or implemented by a combination of hardware and software modules in the processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method. To avoid repetition, a detailed description is not provided herein.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
Example IV
The present embodiment also provides a computer-readable storage medium storing computer instructions that, when executed by a processor, perform the method of embodiment one.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The parameter setting method of the power system stabilizer is characterized by comprising the following steps of:
acquiring related parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating uncompensated phase frequency characteristic variation of the unit caused by the change of the difference adjustment coefficient under different frequencies;
acquiring test phase frequency characteristics under an original difference adjustment coefficient, and calculating a theoretical value of the phase frequency characteristics of the unit after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit; under a certain frequency, the theoretical value of the phase frequency characteristic of the unit after the variation of the difference adjustment coefficient is the sum of the uncompensated phase frequency characteristic variation of the unit under the corresponding frequency and the experimental phase frequency characteristic value under the original difference adjustment coefficient;
judging whether the hysteresis rotation speed angle of each additional moment is in a reasonable range under the parameters of the stabilizer of the initial power system based on the theoretical value of the phase frequency characteristic of the unit after the difference adjustment coefficient is changed;
and based on the judging result, when the additional torque lag rotating speed angle is not in a reasonable range, correcting the parameters of the stabilizer of the electric power system until all the additional torque lag rotating speed angles are in the reasonable range.
2. The method for setting parameters of a power system stabilizer according to claim 1, wherein the unit uncompensated phase frequency characteristic variation amount at a certain frequency is a difference between a unit uncompensated phase frequency characteristic of a generator unit under an original tuning difference coefficient and a unit uncompensated phase frequency characteristic under a new tuning difference coefficient.
3. A method of setting parameters of an electrical power system stabilizer according to claim 1, wherein the generator parameters include: the method comprises the steps of a generator fundamental wave angular frequency value, an inertia time constant of a generator, a damping coefficient of the generator, a generator d-axis synchronous reactance, a generator q-axis synchronous reactance, a generator d-axis transient reactance, a coupling reactance between the generator and an infinite power system, a q-axis component of a machine end current, a generator end voltage, a component of the generator end voltage on a d-axis, a component of the generator end voltage on a q-axis, a generator sub-transient potential, an imaginary potential after the generator q-axis synchronous reactance, a generator d-axis transient reactance including the coupling reactance and a generator q-axis synchronous reactance including the coupling reactance;
the parameters related to the power system include the power system voltage and the angle between the power system voltage and the q-axis.
4. A parameter tuning system for a power system stabilizer, comprising:
the compensation-free phase frequency characteristic change amount calculation module is used for obtaining relevant parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating the compensation-free phase frequency characteristic change amount of the unit caused by the change of the difference adjustment coefficient under different frequencies;
the unit phase frequency characteristic theoretical value calculation module is used for acquiring the test phase frequency characteristic under the original difference adjustment coefficient, and calculating the unit phase frequency characteristic theoretical value after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variation quantity of the unit; under a certain frequency, the theoretical value of the phase frequency characteristic of the unit after the variation of the difference adjustment coefficient is the sum of the uncompensated phase frequency characteristic variation of the unit under the corresponding frequency and the experimental phase frequency characteristic value under the original difference adjustment coefficient;
the additional moment hysteresis rotation speed angle judging module is used for judging whether each additional moment hysteresis rotation speed angle is in a reasonable range or not under the parameters of the initial power system stabilizer based on the theoretical value of the phase frequency characteristic of the unit after the adjustment difference coefficient is changed;
and the power system stabilizer parameter correction module is used for correcting the power system stabilizer parameters until all the additional moment lag rotating speed angle ranges are within a reasonable range when the additional moment lag rotating speed angle is not within the reasonable range based on the judgment result.
5. The system for setting parameters of a power system stabilizer according to claim 4, wherein the variation of the uncompensated phase frequency characteristic of the generator set at a certain frequency is a difference between the uncompensated phase frequency characteristic of the generator set at the original tuning difference coefficient and the uncompensated phase frequency characteristic of the generator set at the new tuning difference coefficient.
6. A power system stabilizer parameter tuning system in accordance with claim 4, wherein said generator related parameters include: the method comprises the steps of a generator fundamental wave angular frequency value, an inertia time constant of a generator, a damping coefficient of the generator, a generator d-axis synchronous reactance, a generator q-axis synchronous reactance, a generator d-axis transient reactance, a coupling reactance between the generator and an infinite power system, a q-axis component of a machine end current, a generator end voltage, a component of the generator end voltage on a d-axis, a component of the generator end voltage on a q-axis, a generator sub-transient potential, an imaginary potential after the generator q-axis synchronous reactance, a generator d-axis transient reactance including the coupling reactance and a generator q-axis synchronous reactance including the coupling reactance;
the parameters related to the power system include the power system voltage and the angle between the power system voltage and the q-axis.
7. An electronic device, comprising:
a memory for non-transitory storage of computer readable instructions; and
a processor for executing the computer-readable instructions,
wherein the computer readable instructions, when executed by the processor, perform the method of any of the preceding claims 1-3.
8. A storage medium, characterized by non-transitory storing computer-readable instructions, wherein the instructions of the method of any one of claims 1-3 are performed when the non-transitory computer-readable instructions are executed by a computer.
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