CN114362135A - 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 for a power system stabilizer, which are characterized by comprising the following steps of firstly, obtaining relevant parameters of a power system and a generator before and after the change of a difference adjustment coefficient, and calculating the variation of the uncompensated phase-frequency characteristic of a unit caused by the change of the difference adjustment coefficient under different frequencies; then, obtaining a test phase-frequency characteristic under an original difference adjustment coefficient, and calculating a theoretical value of the phase-frequency characteristic of the unit after the difference adjustment coefficient is changed under different frequencies by combining the variation of the uncompensated phase-frequency characteristic of the unit; and finally, judging whether each additional moment lag rotation speed angle is in a reasonable range under the initial power system stabilizer parameter based on the theoretical value of the unit phase-frequency characteristic after the variation of the difference adjustment coefficient, and correcting the power system stabilizer parameter based on the judgment result. The problems of low efficiency and high cost of acquiring the uncompensated phase frequency characteristic of the unit and configuring the PSS parameters by re-performing the field test are solved.
Description
Technical Field
The invention relates to the technical field of power system machine network coordination, in particular to a parameter setting method and system of a power system stabilizer.
Background
The statements in this section merely provide background information related to the present disclosure and may not 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 is widely applied. In particular, the PSS output signal, commonly referred to as Δ U, is superimposed on the main control loop of the automatic voltage regulatorpss(ii) a The uncompensated phase-frequency characteristic of the unit is electromagnetic torque delta TeRelative to the PSS output signal Δ UpssThe phase frequency characteristic of (2) is recorded as
PSS link self phase frequency characteristic
And
under the combined action, PSS can generate positiveThe damping torque of the generator set inhibits the low-frequency oscillation of the generator set, so that the uncompensated phase-frequency characteristic of the generator set has obvious influence on the PSS; when a unit is put into operation or software and hardware of an excitation system are transformed, field tests are usually required to obtain the uncompensated phase-frequency characteristics of the unit, and then the PSS parameters of the unit are configured.
However, with the development of extra-high voltage and new energy, the demand of the power grid for adding a difference adjustment coefficient to the unit is continuously changed, and when the difference adjustment coefficient is changed, if field tests are conducted again to obtain the uncompensated phase-frequency characteristics of the unit and to configure the PSS parameters, the efficiency is low, and the cost is high.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a parameter setting method and a parameter setting system for a power system stabilizer, which realize the evaluation of the effectiveness of the original PSS parameter after the additional adjustment coefficient of a unit is changed, and further modify the PSS parameter.
In a first aspect, the invention provides a parameter setting method for a power system stabilizer;
a parameter setting method of a power system stabilizer comprises the following steps:
acquiring relevant parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating the variation of the uncompensated phase-frequency characteristic of the unit caused by the change of the difference adjustment coefficient under different frequencies;
acquiring a test phase-frequency characteristic under an original difference adjustment coefficient, and calculating a theoretical value of the phase-frequency characteristic of the unit after the difference adjustment coefficient is changed under different frequencies by combining the variation of the uncompensated phase-frequency characteristic of the unit;
judging whether each additional moment lag rotation speed angle is in a reasonable range under the initial power system stabilizer parameter based on the theoretical value of the unit phase-frequency characteristic after the difference adjustment coefficient is changed;
and based on the judgment result, when the additional moment lagging rotation speed angle is not in the reasonable range, correcting the parameters of the power system stabilizer until all the additional moment lagging rotation speed angle ranges are in the reasonable range.
Further, at a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the variation of the offset coefficient is the sum of the variation of the uncompensated phase-frequency characteristic of the unit at the corresponding frequency and the experimental phase-frequency characteristic value at the original offset coefficient.
Further, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the generator set is a difference between the uncompensated phase-frequency characteristic of the generator set under the original difference adjustment coefficient and the uncompensated phase-frequency characteristic of the generator set under the new difference adjustment coefficient.
Further, the relevant parameters of the generator include: 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 generator terminal current, a generator terminal voltage, a component of a generator terminal voltage on a d axis, a component of a generator terminal 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 relevant parameters of the power system comprise the voltage of the power system and an included angle between the voltage of the power system and a q axis.
In a second aspect, the invention provides a parameter setting system for a power system stabilizer;
a parameter tuning system for a power system stabilizer, comprising:
the unit uncompensated phase-frequency characteristic variation calculating module is used for acquiring relevant parameters of the power system and the generator before and after the variation of the difference adjustment coefficient and calculating the unit uncompensated phase-frequency characteristic variation caused by the variation of the difference adjustment coefficient under different frequencies;
the unit phase frequency characteristic theoretical value calculating module is used for acquiring a test phase frequency characteristic under an original difference adjustment coefficient, and calculating a unit phase frequency characteristic theoretical value after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variable quantity of the unit;
the additional moment lagging rotation speed angle judging module is used for judging whether each additional moment lagging rotation speed angle is in a reasonable range under the initial power system stabilizer parameter based on the theoretical value of the unit phase frequency characteristic after the difference adjustment coefficient is changed;
and the power system stabilizer parameter correction module is used for correcting the power system stabilizer parameters when the additional moment lagging rotation speed angle is not in the reasonable range based on the judgment result until all the additional moment lagging rotation speed angle ranges are in the reasonable range.
Further, at a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the variation of the offset coefficient is the sum of the variation of the uncompensated phase-frequency characteristic of the unit at the corresponding frequency and the experimental phase-frequency characteristic value at the original offset coefficient.
Further, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the generator set is a difference between the uncompensated phase-frequency characteristic of the generator set under the original difference adjustment coefficient and the uncompensated phase-frequency characteristic of the generator set under the new difference adjustment coefficient.
Further, the relevant parameters of the generator include: 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 generator terminal current, a generator terminal voltage, a component of a generator terminal voltage on a d axis, a component of a generator terminal 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 relevant parameters of the power system comprise the voltage of the power system and an included angle between the voltage of the power system and a q axis.
In a third aspect, the present invention further 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.
In a fourth aspect, the present invention also provides a storage medium storing non-transitory computer readable instructions, wherein the non-transitory computer readable instructions, when executed by a computer, perform the instructions of the method of the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the parameter setting method of the power system stabilizer realizes the evaluation of the effectiveness of the original PSS parameter after the additional adjustment coefficient of the unit is changed, further modifies the PSS parameter, and solves the problems of low efficiency and high cost of re-performing a field test to obtain the uncompensated phase-frequency characteristic of the unit and configuring the PSS parameter.
Advantages of 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.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a flowchart of a parameter setting method for a power system stabilizer according to an embodiment of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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 invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
All data are obtained according to the embodiment and are legally applied on the data on the basis of compliance with laws and regulations and user consent.
Example one
The embodiment provides a parameter setting method of a power system stabilizer;
as shown in fig. 1, a method for setting parameters of a power system stabilizer, which realizes automatic and accurate modification of PSS parameters when a unit adjustment coefficient is changed, includes:
step 1, obtaining relevant parameters of an electric power system and a generator, and calculating the variation of the uncompensated phase-frequency characteristics of a unit caused by the variation of a difference adjustment coefficient under different frequencies, specifically:
and 101, acquiring relevant parameters of a power system and a generator.
Specifically, the generator related parameters include: generator fundamental wave angular frequency value omega0Inertia time constant M of generator, damping coefficient D of generator and D-axis synchronous reactance x of generatordQ-axis synchronous reactance x of generatorqD-axis transient reactance x of generatord', coupling reactance x between generator and infinite power systemeQ-axis component i of terminal currentq0Voltage U of generator terminalt0The component U of the voltage at the generator end on the d axistd0The component U of the voltage at the generator end on the q axistq0Generator sub-transient potential Eq0', generator q-axis synchronous reactance xqRear virtual potential EQ0D-axis transient reactance x 'of generator including link reactance'dΣAnd generator q-axis synchronous reactance x including coupling reactanceq∑。
The power system related parameters include: voltage V of power systemsAnd the angle delta between the voltage of the power system and the q axis0。
102, calculating an original difference adjustment coefficient set value X based on relevant parameters of a power system and a generatorc1And then, the generator set has no compensation phase-frequency characteristic under different frequencies of 0.1-2.0 HZ, and specifically, one point is taken at every 0.1HZ interval within the range of 0.1-2.0 HZ.
Firstly, adopting excitation voltage per unit value u under excitation per unit systemfdConversion by XadPer unit value E under per unit systemfd：
Wherein, IFD0Rotor currents, R, corresponding to rated voltages on the no-load air gap line of the synchronous machineFDIs the nominal value of the rotor resistance, ufdbaseRecording the reference value of the excitation voltage under the excitation per unit system
Represents the excitation voltage U under the per unit excitation systemfdConversion to XadPer unit system EfdThe coefficient of time.
Then, the original adjustment coefficient set value X is calculatedc1Uncompensated phase frequency characteristic of generator set under 0.1-2.0 HZ
Wherein, the calculation formula of the uncompensated phase-frequency characteristic of the unit is as follows,
wherein, KARepresenting the amplification factor of the excitation system, the value of which is taken as the amplification factor of the control part of the excitation system in the modeling report of the excitation system and K7The product of (a); omega0Is the fundamental angular frequency value, ω0Is a famous value, and the unit is rad/s; m is inertia of generatorA sexual time constant, M is a named value, and the unit is S; d is a damping coefficient and is dimensionless; k1～K'6The expression of (a) is as follows:
K'5＝K5+K11·Xc
K'6＝K6+K12·Xc
wherein x isdIs a d-axis synchronous reactance of the generator; x is the number ofqIs a generator q-axis synchronous reactance; x is the number ofd' is the d-axis transient reactance of the generator; x is the number ofeIs a generator anda coupling reactance between infinite power systems; i.e. iq0Q-axis component of terminal current; u shapet0Is the generator terminal voltage; u shapetd0The component of the voltage at the end of the generator on the d axis is shown; u shapetq0The component of the voltage at the generator end on the q axis is shown; eq0' is the generator sub-transient potential; vsIs the power system voltage; eQ0Is reactance xqThe latter hypothetical potential; x'dΣIs a generator d-axis transient reactance including a coupling reactance; x is the number ofq∑A q-axis synchronous reactance of the generator including a coupling reactance; x is the number ofd、xq、xd′、xe、iq0、Ut0、Utd0、Utq0、Eq0′、Vs、EQ0、x'dΣ、xq∑Are all XadPer unit value under per unit system; delta0Is the angle between the voltage of the power system and the q-axis, δ0Is a named value, in rad; xcXc is dimensionless for the adjustment coefficient.
Step 103, calculating the new setting adjustment difference coefficient value Xc2The unit uncompensated phase-frequency characteristic of a generator set under different frequencies of 0.1-2.0 HZ (f is 0.1HZ, 0.2HZ, …,2.0HZ)
The calculation method is the same as that in step 102.
104, calculating the variation of the uncompensated phase-frequency characteristics of the generator set caused by the variation of the difference adjustment coefficient under the condition that the generator set is at 0.1-2.0 HZ
Specifically, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the unit is the difference between the uncompensated phase-frequency characteristic of the unit under the original difference adjustment coefficient and the uncompensated phase-frequency characteristic of the unit under the new difference adjustment coefficient of the generator unit under the corresponding frequency, that is, the calculation formula of the variation of the uncompensated phase-frequency characteristic of the unit under the frequency f is as follows
Step 2, obtaining a test phase-frequency characteristic under an original difference adjustment coefficient, and calculating a theoretical value of the phase-frequency characteristic of the unit after the difference adjustment coefficient is changed under different frequencies by combining the variation of the uncompensated phase-frequency characteristic of the unit
Specifically, at 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 variation of the uncompensated phase-frequency characteristic of the unit at the corresponding frequency and the experimental phase-frequency characteristic value at the original difference adjustment coefficient, that is, the calculation formula of the theoretical value of the phase-frequency characteristic of the unit after the variation of the difference adjustment coefficient at the frequency f is
Wherein the content of the first and second substances,
in order to obtain the test phase frequency characteristic value under the original difference modulation coefficient by the PSS test report of the unit, under different frequencies,
the value of (c) is different.
Step 5, judging whether each additional moment lag rotation speed angle under all frequencies is in a reasonable range under the initial power system stabilizer parameters based on the theoretical value of the unit phase-frequency characteristic after the variation of the difference adjustment coefficient; if so, maintaining the initial power system stabilizer parameters unchanged; otherwise, the parameters of the power system stabilizer are corrected until the additional moment lag rotation speed angle range under all the frequencies is in a reasonable range.
Specifically, the compensation angle margin is set in consideration of the error of the phase frequency characteristic after the change of the calculated difference adjustment
Compensating for angular margin
Taking the angle as 10 degrees; calculating a set phase-frequency characteristic theoretical value of the initial PSS parameter after the variation of the adjustment coefficient under each frequency f
Lower, additional moment lags the rotational speed angle
Whether it is in a reasonable range
Internal; if so, maintaining the original parameters unchanged; if not, modifying the PSS parameter until the lag rotation speed angle of the additional moment under all frequencies is in a reasonable range; wherein the content of the first and second substances,
setting an angle range value specified in a test guide rule by a DL/T1231 power system stabilizer under the frequency f;
is composed of
And the sum of the angles behind the PSS itself,
wherein the content of the first and second substances,
and the phase-frequency characteristic of the PSS link is shown.
The method of the invention realizes that the effectiveness of the original PSS parameter is evaluated after the additional adjustment coefficient of the unit is changed, and the PSS parameter is further modified, thereby solving the problems of low efficiency and high cost of acquiring the uncompensated phase-frequency characteristic of the unit and configuring the PSS parameter by carrying out the field test again.
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 unit uncompensated phase-frequency characteristic variation calculating module is used for acquiring relevant parameters of the power system and the generator before and after the variation of the difference adjustment coefficient and calculating the unit uncompensated phase-frequency characteristic variation caused by the variation of the difference adjustment coefficient under different frequencies;
the unit phase frequency characteristic theoretical value calculating module is used for acquiring a test phase frequency characteristic under an original difference adjustment coefficient, and calculating a unit phase frequency characteristic theoretical value after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variable quantity of the unit;
the additional moment lagging rotation speed angle judging module is used for judging whether each additional moment lagging rotation speed angle is in a reasonable range under the initial power system stabilizer parameter based on the theoretical value of the unit phase frequency characteristic after the difference adjustment coefficient is changed;
and the power system stabilizer parameter correction module is used for correcting the power system stabilizer parameters when the additional moment lagging rotation speed angle is not in the reasonable range based on the judgment result until all the additional moment lagging rotation speed angle ranges are in the reasonable range. Is specifically configured to: if the additional moment lag rotation speed angle is in a reasonable range, maintaining the initial power system stabilizer parameters unchanged; otherwise, the parameters of the power system stabilizer are corrected until all the additional moment lag rotation speed angle ranges are within a reasonable range.
Under a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the variation of the offset coefficient is the sum of the variation of the uncompensated phase-frequency characteristic of the unit under the corresponding frequency and the experimental phase-frequency characteristic value under the original offset coefficient.
Under a certain frequency, the variation of the uncompensated phase-frequency characteristic of the unit is the difference between the uncompensated phase-frequency characteristic of the unit under the original difference adjustment coefficient and the uncompensated phase-frequency characteristic of the unit under the new difference adjustment coefficient of the generator set under the corresponding frequency.
Wherein, the relevant parameters of the generator include: 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 generator terminal current, a generator terminal voltage, a component of a generator terminal voltage on a d axis, a component of a generator terminal 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; relevant parameters of 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 modules correspond to the steps in the first embodiment, and the modules are the same as the corresponding steps in the implementation example and the application scenario, but are not limited to the disclosure in the first embodiment. It should be noted that the modules described above as part of a system may be implemented in a computer system such as a set of computer-executable instructions.
In the foregoing embodiments, the descriptions of the embodiments have different emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The proposed system can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the above-described modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules may be combined or integrated into another system, or some features may be omitted, or not executed.
EXAMPLE III
The present embodiment also provides an electronic device, including: one or more processors, one or more memories, and one or more computer programs; wherein, a processor is connected with the memory, the one or more computer programs are stored in the memory, and when the electronic device runs, the processor executes the one or more computer programs stored in the memory, so as to make the electronic device execute the method according to 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 arrays FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include both read-only memory and random access memory, and may 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 device type information.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software.
The method in the first embodiment may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
Those of ordinary skill in the art will appreciate that the various illustrative 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 implementation. 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 four
The present embodiments also provide a computer-readable storage medium for storing computer instructions, which when executed by a processor, perform the method of the first embodiment.
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 parameter setting method of a power system stabilizer is characterized by comprising the following steps:
acquiring relevant parameters of the power system and the generator before and after the change of the difference adjustment coefficient, and calculating the variation of the uncompensated phase-frequency characteristic of the unit caused by the change of the difference adjustment coefficient under different frequencies;
acquiring a test phase-frequency characteristic under an original difference adjustment coefficient, and calculating a theoretical value of the phase-frequency characteristic of the unit after the difference adjustment coefficient is changed under different frequencies by combining the variation of the uncompensated phase-frequency characteristic of the unit;
judging whether each additional moment lag rotation speed angle is in a reasonable range under the initial power system stabilizer parameter based on the theoretical value of the unit phase-frequency characteristic after the difference adjustment coefficient is changed;
and based on the judgment result, when the additional moment lagging rotation speed angle is not in the reasonable range, correcting the parameters of the power system stabilizer until all the additional moment lagging rotation speed angle ranges are in the reasonable range.
2. The method as claimed in claim 1, wherein, at a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the variation of the misalignment coefficient is the sum of the variation of the uncompensated phase-frequency characteristic of the unit at the corresponding frequency and the experimental phase-frequency characteristic value at the original misalignment coefficient.
3. The method as claimed in claim 1, wherein, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the generator set is a difference between the uncompensated phase-frequency characteristic of the generator set at the corresponding frequency under the original skew adjustment coefficient and the uncompensated phase-frequency characteristic of the generator set under the new skew adjustment coefficient.
4. The method as claimed in claim 1, wherein the parameters related to the generator include: 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 generator terminal current, a generator terminal voltage, a component of a generator terminal voltage on a d axis, a component of a generator terminal 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 relevant parameters of the power system comprise the voltage of the power system and an included angle between the voltage of the power system and a q axis.
5. A parameter setting system of a power system stabilizer is characterized by comprising:
the unit uncompensated phase-frequency characteristic variation calculating module is used for acquiring relevant parameters of the power system and the generator before and after the variation of the difference adjustment coefficient and calculating the unit uncompensated phase-frequency characteristic variation caused by the variation of the difference adjustment coefficient under different frequencies;
the unit phase frequency characteristic theoretical value calculating module is used for acquiring a test phase frequency characteristic under an original difference adjustment coefficient, and calculating a unit phase frequency characteristic theoretical value after the difference adjustment coefficient is changed under different frequencies by combining the uncompensated phase frequency characteristic variable quantity of the unit;
the additional moment lagging rotation speed angle judging module is used for judging whether each additional moment lagging rotation speed angle is in a reasonable range under the initial power system stabilizer parameter based on the theoretical value of the unit phase frequency characteristic after the difference adjustment coefficient is changed;
and the power system stabilizer parameter correction module is used for correcting the power system stabilizer parameters when the additional moment lagging rotation speed angle is not in the reasonable range based on the judgment result until all the additional moment lagging rotation speed angle ranges are in the reasonable range.
6. The parameter setting system of the power system stabilizer according to claim 5, wherein at 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 variation of the uncompensated phase-frequency characteristic of the unit at the corresponding frequency and the experimental phase-frequency characteristic value at the original difference adjustment coefficient.
7. The parameter setting system of claim 5, wherein at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the generator set is a difference between the uncompensated phase-frequency characteristic of the generator set at the corresponding frequency under the original compensation coefficient and the uncompensated phase-frequency characteristic of the generator set under the new compensation coefficient.
8. The parameter tuning system of the power system stabilizer according to claim 5, wherein the relevant parameters of the generator include: 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 generator terminal current, a generator terminal voltage, a component of a generator terminal voltage on a d axis, a component of a generator terminal 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 relevant parameters of the power system comprise the voltage of the power system and an included angle between the voltage of the power system and a q axis.
9. 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 claims 1-7.
10. A storage medium storing non-transitory computer-readable instructions, wherein the non-transitory computer-readable instructions, when executed by a computer, perform the instructions of the method of any one of claims 1-7.
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