CN114362135B - A parameter tuning method and system for a power system stabilizer - Google Patents

Abstract

The invention discloses a parameter setting method and system of a power system stabilizer. Firstly, the relevant parameters of the power system and the generator before and after the change of the difference adjustment coefficient are obtained, and the non-compensated phase of the unit caused by the change of the difference adjustment coefficient is calculated at different frequencies. Then, obtain the experimental phase-frequency characteristics under the original adjustment coefficient, and combine the uncompensated phase-frequency characteristic variation of the unit to calculate the theoretical value of the unit’s phase-frequency characteristics after the change of the adjustment coefficient under different frequencies; finally, Based on the theoretical value of the phase-frequency characteristics of the unit after the change of the adjustment coefficient, it is judged whether the lagging speed angle of each additional torque is within a reasonable range under the initial power system stabilizer parameters, and based on the judgment results, the power system stabilizer parameters are corrected. It solves the problem of low efficiency and high cost of re-conducting the field test to obtain the uncompensated phase-frequency characteristics of the unit and configure the PSS parameters.

Description

A parameter tuning method and system for a power system stabilizer

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 technique

The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art.

PSS环节自身相频特性/>

与/>

共同作用下，使得PSS能够产生正的阻尼转矩，抑制机组低频振荡，故机组的无补偿相频特性对PSS影响显著；机组投运或励磁系统软、硬件改造时，通常需要现场试验获取机组的无补偿相频特性，进而配置机组的PSS参数。Power system stabilizer (PSS) is an important measure to increase system damping, suppress low-frequency oscillation, and improve system stability, and has been widely used. In actual implementation, the output signal of the PSS is superimposed on the main control loop of the automatic voltage regulator, and its output signal is usually recorded as ΔU _pss ; the uncompensated phase-frequency characteristic of the unit refers to the electromagnetic torque ΔT _e relative to the PSS output signal ΔU _pss The phase-frequency characteristics of

Phase-frequency characteristics of the PSS link itself/>

with />

Under the combined action, the PSS can generate positive damping torque and suppress the low-frequency oscillation of the unit, so the uncompensated phase-frequency characteristics of the unit have a significant impact on the PSS; when the unit is put into operation or the excitation system is modified, field tests are usually required to obtain The uncompensated phase-frequency characteristics of the unit, and then configure the PSS parameters of the unit.

However, with the development of UHV and new energy, the demand of the power grid for the additional adjustment coefficient of the unit is also constantly changing. , low efficiency and high cost.

Contents of the invention

In order to solve the deficiencies of the prior art, the present invention provides a parameter setting method and system of a power system stabilizer, which can evaluate the validity of the original PSS parameters and further modify the PSS parameters after the additional adjustment coefficient of the unit is changed.

In a first aspect, the present invention provides a method for parameter setting of a power system stabilizer;

A parameter tuning method for a power system stabilizer, comprising:

Obtain the relevant parameters of the power system and generator before and after the variation of the variation coefficient, and calculate the uncompensated phase-frequency characteristic variation of the unit caused by the variation of the variation coefficient at different frequencies;

Obtain the experimental phase-frequency characteristics under the original adjustment coefficient, and combine the uncompensated phase-frequency characteristic change of the unit to calculate the theoretical value of the unit's phase-frequency characteristics after the change of the adjustment coefficient at different frequencies;

Based on the theoretical value of the phase-frequency characteristics of the unit after the variation of the adjustment coefficient, it is judged whether the lagging speed angle of each additional torque is within a reasonable range under the initial power system stabilizer parameters;

Based on the judgment result, when the lagging speed angle of the additional torque is not in a reasonable range, the parameters of the power system stabilizer are corrected until the lagging speed angle range of all the additional torque is within a reasonable range.

Further, at a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the change of the adjustment coefficient is the sum of the uncompensated phase-frequency characteristic change of the unit at the corresponding frequency and the test phase-frequency characteristic value under the original adjustment coefficient .

Further, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the unit is: difference in frequency characteristics.

Further, the relevant parameters of the generator include: generator fundamental angular frequency value, generator inertia time constant, generator damping coefficient, generator d-axis synchronous reactance, generator q-axis synchronous reactance, generator d Shaft transient reactance, coupling reactance between generator and infinite power system, q-axis component of machine terminal current, generator terminal voltage, component of generator terminal voltage on d-axis, component of generator terminal voltage on q-axis, Generator sub-transient potential, imaginary potential after generator q-axis synchronous reactance, generator d-axis transient reactance including coupling reactance and generator q-axis synchronous reactance including coupling reactance;

The relevant parameters of 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 setting system for a power system stabilizer;

A parameter setting system for a power system stabilizer, comprising:

The calculation module of the uncompensated phase-frequency characteristic change of the unit is used to obtain the relevant parameters of the power system and the generator before and after the change of the adjustment coefficient, and calculate the uncompensated phase-frequency characteristic change of the unit caused by the change of the adjustment coefficient under different frequencies;

The theoretical value calculation module of the phase-frequency characteristic of the unit is used to obtain the experimental phase-frequency characteristics under the original adjustment coefficient, and combine the uncompensated phase-frequency characteristic change of the unit to calculate the theory of the phase-frequency characteristics of the unit after the adjustment coefficient changes under different frequencies value;

The additional torque lagging speed angle judgment module is used to judge whether the lagging speed angle of each additional torque is within 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 variation coefficient is changed;

The power system stabilizer parameter correction module is used to modify the parameters of the power system stabilizer based on the judgment result when the lagging speed angle of the additional torque is not within a reasonable range, until all the lagging speed angle ranges of the additional torque are within a reasonable range.

Further, at a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the change of the adjustment coefficient is the sum of the uncompensated phase-frequency characteristic change of the unit at the corresponding frequency and the test phase-frequency characteristic value under the original adjustment coefficient .

Further, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the unit is: difference in frequency characteristics.

Further, the relevant parameters of the generator include: generator fundamental angular frequency value, generator inertia time constant, generator damping coefficient, generator d-axis synchronous reactance, generator q-axis synchronous reactance, generator d Shaft transient reactance, coupling reactance between generator and infinite power system, q-axis component of machine terminal current, generator terminal voltage, component of generator terminal voltage on d-axis, component of generator terminal voltage on q-axis, Generator sub-transient potential, imaginary potential after generator q-axis synchronous reactance, generator d-axis transient reactance including coupling reactance and generator q-axis synchronous reactance including coupling reactance;

The relevant parameters of 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, comprising:

memory for non-transitory storage of computer readable instructions; and

a processor for executing said computer readable instructions,

Wherein, when the computer-readable instructions are executed by the processor, the method described in the first aspect above is performed.

In a fourth aspect, the present invention also provides a storage medium that non-transitorily stores computer-readable instructions, wherein, when the non-transitory computer-readable instructions are executed by a computer, the instructions for executing the method described in the first aspect .

Compared with prior art, the beneficial effect of the present invention is:

The parameter setting method of a power system stabilizer of the present invention realizes the evaluation of the validity of the original PSS parameters after the additional adjustment coefficient of the unit is changed, and further modifies the PSS parameters, which solves the problem of re-performing the field test to obtain the unit Compensating the phase-frequency characteristics and configuring the PSS parameters is inefficient and costly.

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.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention.

FIG. 1 is a flow chart of a method for parameter setting of a power system stabilizer according to Embodiment 1 of the present invention.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present 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 should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that the terms "comprising" and "having" and any variations thereof are intended to cover a non-exclusive Comprising, for example, a process, method, system, product, or device comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include steps or units not explicitly listed or for these processes, methods, Other steps or units inherent in a product or equipment.

In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

The acquisition of all data in this embodiment is based on compliance with laws and regulations and user consent, and the legal application of data.

Embodiment one

This embodiment provides a method for parameter setting of a power system stabilizer;

As shown in Figure 1, a parameter setting method of a power system stabilizer realizes automatic and accurate modification of PSS parameters when the unit adjustment coefficient changes, including:

Step 1. Obtain the relevant parameters of the power system and the generator, and calculate the uncompensated phase-frequency characteristic variation of the unit caused by the variation of the differential coefficient at different frequencies, specifically:

Step 101, acquiring relevant parameters of the power system and the generator.

Specifically, the parameters related to the generator include: generator fundamental angular frequency value ω ₀ , generator inertia time constant M, generator damping coefficient D, generator d-axis synchronous reactance x _d , generator q-axis synchronous reactance x _q , generator d-axis transient reactance x _d ′, coupling reactance x _e between generator and infinite power system, q-axis component i _q0 of generator terminal current, generator terminal voltage U _t0 , generator terminal voltage at d axis component U _td0 , component of generator terminal voltage on q-axis U _tq0 , generator subtransient potential E _q0 ′, imaginary potential E _Q0 after generator q-axis synchronous reactance x _q , power generation including coupling reactance Generator d-axis transient reactance x' _dΣ and generator q-axis synchronous reactance x _qΣ including coupling reactance.

The relevant parameters of the power system include: the power system voltage V _s and the angle δ ₀ between the power system voltage and the q-axis.

Step 102, based on the relevant parameters of the power system and the generator, calculate the original adjustment coefficient setting value X _c1 , the phase-frequency characteristics of the generator set at different frequencies of 0.1 to 2.0 Hz without compensation, specifically, the range of 0.1 to 2.0 Hz One point is taken at intervals of 0.1HZ.

First, convert the per unit value u _fd of the excitation voltage under the excitation per unit system to the per unit value E _fd under the X _ad per unit system:

表示将励磁标幺系统下的励磁电压U_fd转化为X_ad标幺系统下E_fd时的系数。Among them, I _FD0 is the rotor current corresponding to the rated voltage on the no-load air gap line of the synchronous machine, R _FD is the nominal value of the rotor resistance, u _fdbase is the reference value of the excitation voltage under the excitation per unit system, denoted

Indicates the coefficient when converting the excitation voltage U _fd under the excitation per unit system to E _fd under the X _ad per unit system.

其中，机组无补偿相频特性的计算公式如下，Then, calculate the uncompensated phase-frequency characteristics of the generator set at 0.1~2.0HZ under the original adjustment coefficient setting value X _c1

Among them, the calculation formula of the uncompensated phase-frequency characteristic of the unit is as follows,

Among them, K _A represents the magnification of the excitation system, and its value is taken as the product of the magnification of the excitation system control part in the excitation system modeling report and K ₇ ; ω ₀ is the value of the fundamental angular frequency, ω ₀ is a well-known value, and the unit is rad/s; M is the inertial time constant of the generator, M is a well-known value, and the unit is S; D is the damping coefficient, D is dimensionless; the expression of K ₁ ~ K' ₆ is as follows:

K' ₅ ＝K ₅ +K ₁₁ ·X _c

K' ₆ ＝K ₆ +K ₁₂ ·X _c

Among them, x _d is the d-axis synchronous reactance of the generator; x _q is the q-axis synchronous reactance of the generator; x _d ′ is the d-axis transient reactance of the generator; x _e is the coupling reactance between the generator and the infinite power system; i _q0 is the q-axis component of the machine terminal current; U _t0 is the generator terminal voltage; U _td0 is the component of the generator terminal voltage on the d-axis; U _tq0 is the component of the generator terminal voltage on the q _- axis; sub-transient potential; V _s is the power system voltage; E _Q0 is the imaginary potential after the reactance x _q ; x' _dΣ is the d-axis transient reactance of the generator including the coupling reactance; x _q∑ is including the coupling reactance Generator q-axis synchronous reactance; 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∑ are all is the per unit value under the X _ad per unit system; δ ₀ is the angle between the power system voltage and the q-axis, δ ₀ is a well-known value, and the unit is rad; X _c is the adjustment coefficient, and Xc is dimensionless.

其计算方法与步骤102相同。Step 103. Calculate the non-compensated phase-frequency characteristics of the generator set at different frequencies 0.1-2.0HZ (f=0.1HZ, 0.2HZ,...,2.0HZ) under the newly set adjustment coefficient value X _c2

Its calculation method is the same as step 102.

具体的，某一频率下，机组无补偿相频特性变化量为，对应频率下的发电机组在原始调差系数下的机组无补偿相频特性与新调差系数下的机组无补偿相频特性的差值，即，频率f下机组无补偿相频特性变化量的计算公式为Step 104. Calculate the uncompensated phase-frequency characteristic variation of the motor unit caused by the change of the adjustment coefficient at 0.1 to 2.0 Hz

Specifically, at a certain frequency, the amount of change in the uncompensated phase-frequency characteristics of the generator set is, the uncompensated phase-frequency characteristics of the generator set under the original adjustment coefficient and the uncompensated phase-frequency characteristics of the generator set under the new adjustment coefficient at the corresponding frequency The difference, that is, the calculation formula for the uncompensated phase-frequency characteristic variation of the unit at frequency f is

具体的，某一频率下，调差系数变化后的机组相频特性理论值为，对应频率下的机组无补偿相频特性变化量与原始调差系数下的试验相频特性值的和，即，频率f下调差系数变化后的机组相频特性理论值的计算公式为Step 2. Obtain the test phase-frequency characteristics under the original adjustment coefficient, and combine the uncompensated phase-frequency characteristic variation of the unit to calculate the theoretical value of the unit’s phase-frequency characteristics after changing the adjustment coefficient at different frequencies

Specifically, at a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the variation coefficient is changed is the sum of the uncompensated phase-frequency characteristic change of the unit at the corresponding frequency and the test phase-frequency characteristic value under the original modulation coefficient, that is , the calculation formula of the theoretical value of the phase-frequency characteristics of the unit after the change of the differential coefficient at the frequency f is:

为由该机组的PSS试验报告获取原调差系数下的试验相频特性值，不同频率下，/>

的值不同。in,

In order to obtain the test phase-frequency characteristic value under the original adjustment coefficient from the PSS test report of the unit, under different frequencies, />

value is different.

Step 5. Based on the theoretical value of the phase-frequency characteristics of the unit after the variation of the adjustment coefficient, judge whether the lagging speed angle of each additional torque at all frequencies is within a reasonable range under the initial power system stabilizer parameters; if so, maintain the initial power system The parameters of the stabilizer remain unchanged; otherwise, the parameters of the power system stabilizer are corrected until the angular range of the lagging speed of the additional torque at all frequencies is within a reasonable range.

补偿角度裕量/>

取为10°；计算每个频率f下，初始PSS参数在调差系数变化后的机组相频特性理论值/>

下，附加力矩滞后转速角度/>

是否在合理范围/>

内；若满足，则维持原参数不变；若不满足，则修改PSS参数，直至所有频率下的附加力矩滞后转速角度在合理范围内；其中，/>

为频率f下，DL/T 1231电力系统稳定器整定试验导则中规定的角度范围值；/>

为/>

和PSS自身之后角度之和，Specifically, considering that there is an error in the phase-frequency characteristics after the calculation of the adjustment adjustment is changed, the compensation angle margin is set

Compensation Angle Margin/>

Take it as 10°; calculate the theoretical value of the phase-frequency characteristics of the unit after the initial PSS parameter changes in the adjustment coefficient at each frequency f

Next, the additional torque lags the speed angle />

Is it within a reasonable range />

If it is satisfied, keep the original parameters unchanged; if it is not satisfied, modify the PSS parameters until the angle of the lagging speed of the additional torque at all frequencies is within a reasonable range; where, />

is the angle range value specified in DL/T 1231 Power System Stabilizer Setting Test Guidelines at frequency f;/>

for />

and the sum of the angles behind the PSS itself,

表示PSS环节自身的相频特性。in,

Indicates the phase-frequency characteristics of the PSS link itself.

The method of the present invention realizes evaluating the validity of the original PSS parameters after the additional adjustment coefficient of the unit is changed, and further modifies the PSS parameters, and solves the problem of low efficiency of re-conducting the field test to obtain the uncompensated phase-frequency characteristics of the unit and configuring the PSS parameters. costly problem.

Embodiment two

This embodiment provides a parameter setting system of a power system stabilizer;

A parameter setting system for a power system stabilizer, comprising:

The calculation module of the uncompensated phase-frequency characteristic change of the unit is used to obtain the relevant parameters of the power system and the generator before and after the change of the adjustment coefficient, and calculate the uncompensated phase-frequency characteristic change of the unit caused by the change of the adjustment coefficient under different frequencies;

The theoretical value calculation module of the phase-frequency characteristic of the unit is used to obtain the experimental phase-frequency characteristics under the original adjustment coefficient, and combine the uncompensated phase-frequency characteristic change of the unit to calculate the theory of the phase-frequency characteristics of the unit after the adjustment coefficient changes under different frequencies value;

The additional torque lagging speed angle judgment module is used to judge whether the lagging speed angle of each additional torque is within 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 variation coefficient is changed;

The power system stabilizer parameter correction module is used to modify the parameters of the power system stabilizer based on the judgment result when the lagging speed angle of the additional torque is not within a reasonable range, until all the lagging speed angle ranges of the additional torque are within a reasonable range. Specifically, it is configured as follows: if the additional torque lagging speed angle is within a reasonable range, then maintain the initial power system stabilizer parameters unchanged; otherwise, modify the power system stabilizer parameters until all the additional torque lagging speed angle ranges are within a reasonable range .

At a certain frequency, the theoretical value of the phase-frequency characteristic of the unit after the adjustment coefficient is changed is the sum of the uncompensated phase-frequency characteristic change of the unit at the corresponding frequency and the test phase-frequency characteristic value under the original adjustment coefficient.

At a certain frequency, the amount of change in the uncompensated phase-frequency characteristics of the generator set is the difference between the uncompensated phase-frequency characteristics of the generator set under the original adjustment coefficient and the uncompensated phase-frequency characteristics of the generator set under the new adjustment coefficient at the corresponding frequency .

Among them, the relevant parameters of the generator include: generator fundamental angular frequency value, generator inertia time constant, generator damping coefficient, generator d-axis synchronous reactance, generator q-axis synchronous reactance, generator d-axis transient Reactance, coupling reactance between generator and infinite power system, q-axis component of machine terminal current, generator terminal voltage, component of generator terminal voltage on d-axis, component of generator terminal voltage on q-axis, generator times Transient potential, imaginary potential after generator q-axis synchronous reactance, generator d-axis transient reactance including coupling reactance and generator q-axis synchronous reactance including coupling reactance; power system related parameters include power system Voltage and the angle between the power system voltage and the q-axis

It should be noted here that the above-mentioned modules correspond to the steps in the first embodiment, and the examples and application scenarios implemented by the above-mentioned modules and corresponding steps are the same, but are not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the system, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

The description of each embodiment in the foregoing embodiments has its own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The proposed system can be implemented in other ways. For example, the above-described system embodiments are only illustrative. For example, the division of the above modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple modules can be combined or integrated into another A system, or some feature, can be ignored, or not implemented.

Embodiment three

This 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 connected to the memory, and the one or more computer programs are programmed Stored in the memory, when the electronic device is running, the processor executes one or more computer programs stored in the memory, so that the electronic device executes the method described in Embodiment 1 above.

It should be understood that in this embodiment, the processor can be a central processing unit CPU, and the processor can 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 devices , discrete gate or transistor logic devices, discrete hardware components, etc. 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 provides instructions and data to the processor, and a part of the memory may also include non-volatile random access memory. For example, the memory may also store device type information.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.

The method in Embodiment 1 can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in this embodiment can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Embodiment four

This embodiment also provides a computer-readable storage medium for storing computer instructions, and when the computer instructions are executed by a processor, the method described in the first embodiment is completed.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within 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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