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

A parameter tuning method and system for a power system stabilizer Download PDF

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CN114362135B
CN114362135B CN202111312169.7A CN202111312169A CN114362135B CN 114362135 B CN114362135 B CN 114362135B CN 202111312169 A CN202111312169 A CN 202111312169A CN 114362135 B CN114362135 B CN 114362135B
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generator
power system
unit
frequency characteristic
phase frequency
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CN114362135A (en
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朱应峰
解笑苏
王安东
曹志伟
高嵩
杨冬
张维超
袁训奎
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
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Abstract

本发明公开了一种电力系统稳定器的参数整定方法及系统,首先,获取调差系数变化前后的电力系统和发电机的相关参数,计算不同频率下,调差系数变化引起的机组无补偿相频特性变化量;然后,获取原始调差系数下的试验相频特性,并结合机组无补偿相频特性变化量,计算不同频率下,调差系数变化后的机组相频特性理论值;最后,基于调差系数变化后的机组相频特性理论值,判断初始电力系统稳定器参数下,每个附加力矩滞后转速角度是否处于合理范围内,并基于判断结果,修正电力系统稳定器参数。解决了重新进行现场试验获取机组的无补偿相频特性并配置PSS参数效率低、耗资大的问题。

Figure 202111312169

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.

Figure 202111312169

Description

一种电力系统稳定器的参数整定方法及系统A parameter tuning method and system for a power system stabilizer

技术领域technical field

本发明涉及电力系统机网协调技术领域,特别是涉及一种电力系统稳定器的参数整定方法及系统。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.

背景技术Background technique

本部分的陈述仅仅是提到了与本发明相关的背景技术,并不必然构成现有技术。The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art.

电力系统稳定器(PSS)是增加系统阻尼,抑制低频振荡,提高系统稳定性的重要措施,得到广泛应用。具体实现时,PSS的输出信号叠加在自动电压调节器的主控制环路,其输出信号通常记作ΔUpss;机组的无补偿相频特性是指电磁转矩ΔTe相对于PSS输出信号ΔUpss的相频特性,记作

Figure BDA0003342410680000011
PSS环节自身相频特性/>
Figure BDA0003342410680000012
与/>
Figure BDA0003342410680000013
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
Figure BDA0003342410680000011
Phase-frequency characteristics of the PSS link itself/>
Figure BDA0003342410680000012
with />
Figure BDA0003342410680000013
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.

但是,随着特高压和新能源的发展,电网对机组附加调差系数的需求也在不断改变,当调差系数改变后,若重新进行现场试验获取机组的无补偿相频特性并配置PSS参数,效率低、耗资大。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.

发明内容Contents of the invention

为了解决现有技术的不足,本发明提供了一种电力系统稳定器的参数整定方法及系统,实现了在机组附加调差系数改变后,评估原PSS参数的有效性,并进一步修改PSS参数。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.

第一方面,本发明提供了一种电力系统稳定器的参数整定方法;In a first aspect, the present invention provides a method for parameter setting of a power system stabilizer;

一种电力系统稳定器的参数整定方法,包括:A parameter tuning method for a power system stabilizer, comprising:

获取调差系数变化前后的电力系统和发电机的相关参数,计算不同频率下,调差系数变化引起的机组无补偿相频特性变化量;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;

获取原始调差系数下的试验相频特性,并结合机组无补偿相频特性变化量,计算不同频率下,调差系数变化后的机组相频特性理论值;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;

基于调差系数变化后的机组相频特性理论值,判断初始电力系统稳定器参数下,每个附加力矩滞后转速角度是否处于合理范围内;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;

基于判断结果,在存在附加力矩滞后转速角度不处于合理范围时,修正电力系统稳定器参数,直至所有附加力矩滞后转速角度范围处于合理范围内。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.

进一步的,某一频率下,所述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。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 .

进一步的,某一频率下,所述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。Further, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the unit is: difference in frequency characteristics.

进一步的,所述发电机的相关参数包括:发电机基波角频率值、发电机的惯性时间常数、发电机的阻尼系数、发电机d轴同步电抗、发电机q轴同步电抗、发电机d轴暂态电抗、发电机与无穷大电力系统之间的联结电抗、机端电流的q轴分量、发电机端电压、发电机端电压在d轴的分量、发电机端电压在q轴的分量、发电机次暂态电势、发电机q轴同步电抗后的假想电势、包括联结电抗在内的发电机d轴暂态电抗和包括联结电抗在内的发电机q轴同步电抗;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;

所述电力系统的相关参数包括电力系统电压和电力系统电压与q轴之间的夹角。The relevant parameters of the power system include the power system voltage and the angle between the power system voltage and the q-axis.

第二方面,本发明提供了一种电力系统稳定器的参数整定系统;In a second aspect, the present invention provides a parameter setting system for a power system stabilizer;

一种电力系统稳定器的参数整定系统,包括:A parameter setting system for a power system stabilizer, comprising:

机组无补偿相频特性变化量计算模块,用于获取调差系数变化前后的电力系统和发电机的相关参数,计算不同频率下,调差系数变化引起的机组无补偿相频特性变化量;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;

机组相频特性理论值计算模块,用于获取原始调差系数下的试验相频特性,并结合机组无补偿相频特性变化量,计算不同频率下,调差系数变化后的机组相频特性理论值;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;

附加力矩滞后转速角度判断模块,用于基于调差系数变化后的机组相频特性理论值,判断初始电力系统稳定器参数下,每个附加力矩滞后转速角度是否处于合理范围内;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;

电力系统稳定器参数修正模块,用于基于判断结果,在存在附加力矩滞后转速角度不处于合理范围时,修正电力系统稳定器参数,直至所有附加力矩滞后转速角度范围处于合理范围内。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.

进一步的,某一频率下,所述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。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 .

进一步的,某一频率下,所述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。Further, at a certain frequency, the variation of the uncompensated phase-frequency characteristic of the unit is: difference in frequency characteristics.

进一步的,所述发电机的相关参数包括:发电机基波角频率值、发电机的惯性时间常数、发电机的阻尼系数、发电机d轴同步电抗、发电机q轴同步电抗、发电机d轴暂态电抗、发电机与无穷大电力系统之间的联结电抗、机端电流的q轴分量、发电机端电压、发电机端电压在d轴的分量、发电机端电压在q轴的分量、发电机次暂态电势、发电机q轴同步电抗后的假想电势、包括联结电抗在内的发电机d轴暂态电抗和包括联结电抗在内的发电机q轴同步电抗;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;

所述电力系统的相关参数包括电力系统电压和电力系统电压与q轴之间的夹角。The relevant parameters of the power system include the power system voltage and the angle between the power system voltage and the q-axis.

第三方面,本发明还提供了一种电子设备,包括:In a third aspect, the present invention also provides an electronic device, comprising:

存储器,用于非暂时性存储计算机可读指令;以及memory for non-transitory storage of computer readable instructions; and

处理器,用于运行所述计算机可读指令,a processor for executing said computer readable instructions,

其中,所述计算机可读指令被所述处理器运行时,执行上述第一方面所述的方法。Wherein, when the computer-readable instructions are executed by the processor, the method described in the first aspect above is performed.

第四方面,本发明还提供了一种存储介质,非暂时性地存储计算机可读指令,其中,当所述非暂时性计算机可读指令由计算机执行时,执行第一方面所述方法的指令。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 .

与现有技术相比,本发明的有益效果是:Compared with prior art, the beneficial effect of the present invention is:

本发明的一种电力系统稳定器的参数整定方法,其实现了在机组附加调差系数改变后,评估原PSS参数的有效性,并进一步修改PSS参数,解决了重新进行现场试验获取机组的无补偿相频特性并配置PSS参数效率低、耗资大的问题。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.

本发明附加方面的优点将在下面的描述中部分给出,或通过本发明的实践了解到。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.

附图说明Description of drawings

构成本发明的一部分的说明书附图用来提供对本发明的进一步理解,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。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.

图1为本发明实施例一的一种电力系统稳定器的参数整定方法的流程图。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.

具体实施方式Detailed ways

应该指出,以下详细说明都是示例性的,旨在对本发明提供进一步的说明。除非另有指明,本文使用的所有技术和科学术语具有与本发明所属技术领域的普通技术人员通常理解的相同含义。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.

需要注意的是,这里所使用的术语仅是为了描述具体实施方式,而非意图限制根据本发明的示例性实施方式。如在这里所使用的,除非上下文另外明确指出,否则单数形式也意图包括复数形式,此外,还应当理解的是,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。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.

在不冲突的情况下,本发明中的实施例及实施例中的特征可以相互组合。In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

本实施例所有数据的获取都在符合法律法规和用户同意的基础上,对数据的合法应用。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.

实施例一Embodiment one

本实施例提供了一种电力系统稳定器的参数整定方法;This embodiment provides a method for parameter setting of a power system stabilizer;

如图1所示,一种电力系统稳定器的参数整定方法,实现了机组调差系数改变时自动、准确的修改PSS参数,包括: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:

步骤1、获取电力系统和发电机的相关参数,计算不同频率下,调差系数变化引起的机组无补偿相频特性变化量,具体的: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:

步骤101、获取电力系统和发电机的相关参数。Step 101, acquiring relevant parameters of the power system and the generator.

具体的,发电机相关参数包括:发电机基波角频率值ω0、发电机的惯性时间常数M、发电机的阻尼系数D、发电机d轴同步电抗xd、发电机q轴同步电抗xq、发电机d轴暂态电抗xd′、发电机与无穷大电力系统之间的联结电抗xe、机端电流的q轴分量iq0、发电机端电压Ut0、发电机端电压在d轴的分量Utd0、发电机端电压在q轴的分量Utq0、发电机次暂态电势Eq0′、发电机q轴同步电抗xq后的假想电势EQ0、包括联结电抗在内的发电机d轴暂态电抗x'和包括联结电抗在内的发电机q轴同步电抗xq∑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' and generator q-axis synchronous reactance x including coupling reactance.

电力系统相关参数包括:电力系统电压Vs和电力系统电压与q轴之间的夹角δ0The 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.

步骤102、基于电力系统和发电机的相关参数,计算原始调差系数设置值Xc1下,发电机组在不同频率0.1~2.0HZ下的机组无补偿相频特性,具体的,0.1~2.0HZ范围内每间隔0.1HZ取一个点。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.

首先,将采用励磁标幺系统下的励磁电压标幺值ufd转换采用Xad标幺系统下的标幺值EfdFirst, 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:

Figure BDA0003342410680000071
Figure BDA0003342410680000071

其中,IFD0为同步机空载气隙线上对应额定电压的转子电流,RFD为转子电阻有名值,ufdbase为励磁标幺系统下励磁电压的基准值,记

Figure BDA0003342410680000072
表示将励磁标幺系统下的励磁电压Ufd转化为Xad标幺系统下Efd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
Figure BDA0003342410680000072
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.

然后,计算原始调差系数设置值Xc1下发电机组在0.1~2.0HZ下的机组无补偿相频特性

Figure BDA0003342410680000073
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
Figure BDA0003342410680000073
Among them, the calculation formula of the uncompensated phase-frequency characteristic of the unit is as follows,

Figure BDA0003342410680000074
Figure BDA0003342410680000074

其中,KA表示励磁系统放大倍数,其值取为励磁系统建模报告中励磁系统控制部分的放大倍数与K7的乘积;ω0为基波角频率值,ω0为有名值,单位是rad/s;M为发电机的惯性时间常数,M是有名值,单位是S;D为阻尼系数,D无量纲;K1~K'6的表达式如下: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:

Figure BDA0003342410680000081
Figure BDA0003342410680000081

Figure BDA0003342410680000082
Figure BDA0003342410680000082

Figure BDA0003342410680000083
Figure BDA0003342410680000083

Figure BDA0003342410680000084
Figure BDA0003342410680000084

Figure BDA0003342410680000085
Figure BDA0003342410680000085

Figure BDA0003342410680000086
Figure BDA0003342410680000086

Figure BDA0003342410680000087
Figure BDA0003342410680000087

Figure BDA0003342410680000088
Figure BDA0003342410680000088

K'5=K5+K11·Xc K' 5 =K 5 +K 11 ·X c

K'6=K6+K12·Xc K' 6 =K 6 +K 12 ·X c

其中,xd为发电机d轴同步电抗;xq为发电机q轴同步电抗;xd′为发电机d轴暂态电抗;xe为发电机与无穷大电力系统之间的联结电抗;iq0为机端电流的q轴分量;Ut0为发电机端电压;Utd0为发电机端电压在d轴的分量;Utq0为发电机端电压在q轴的分量;Eq0′为发电机次暂态电势;Vs为电力系统电压;EQ0为电抗xq后的假想电势;x'为包括联结电抗在内的发电机d轴暂态电抗;xq∑为包括联结电抗在内的发电机q轴同步电抗;xd、xq、xd′、xe、iq0、Ut0、Utd0、Utq0、Eq0′、Vs、EQ0、x'、xq∑均为Xad标幺系统下的标幺值;δ0为电力系统电压与q轴之间的夹角,δ0为有名值,单位是rad;Xc为调差系数,Xc无量纲。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' 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' , 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.

步骤103、计算新设置调差系数值Xc2下发电机组在不同频率0.1~2.0HZ(f=0.1HZ,0.2HZ,…,2.0HZ)下的机组无补偿相频特性

Figure BDA0003342410680000091
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
Figure BDA0003342410680000091
Its calculation method is the same as step 102.

步骤104、计算电机组在0.1~2.0HZ下,调差系数变化引起的机组无补偿相频特性变化量

Figure BDA0003342410680000092
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
Figure BDA0003342410680000092
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

Figure BDA0003342410680000093
Figure BDA0003342410680000093

步骤2、获取原始调差系数下的试验相频特性,并结合机组无补偿相频特性变化量,计算不同频率下,调差系数改变后的机组相频特性理论值

Figure BDA0003342410680000094
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
Figure BDA0003342410680000094
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:

Figure BDA0003342410680000095
Figure BDA0003342410680000095

其中,

Figure BDA0003342410680000096
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,/>
Figure BDA0003342410680000097
的值不同。in,
Figure BDA0003342410680000096
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, />
Figure BDA0003342410680000097
value is different.

步骤5、基于调差系数变化后的机组相频特性理论值,判断初始电力系统稳定器参数下,所有频率下的每个附加力矩滞后转速角度是否处于合理范围内;若是,则维持初始电力系统稳定器参数不变;否则,修正电力系统稳定器参数,直至所有频率下的附加力矩滞后转速角度范围处于合理范围内。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.

具体的,考虑到计算调差改变后相频特性存在误差,设置补偿角度裕量

Figure BDA0003342410680000101
补偿角度裕量/>
Figure BDA0003342410680000102
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/>
Figure BDA0003342410680000103
下,附加力矩滞后转速角度/>
Figure BDA0003342410680000104
是否在合理范围/>
Figure BDA0003342410680000105
Figure BDA0003342410680000106
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,/>
Figure BDA0003342410680000107
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;/>
Figure BDA0003342410680000108
为/>
Figure BDA0003342410680000109
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
Figure BDA0003342410680000101
Compensation Angle Margin/>
Figure BDA0003342410680000102
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
Figure BDA0003342410680000103
Next, the additional torque lags the speed angle />
Figure BDA0003342410680000104
Is it within a reasonable range />
Figure BDA0003342410680000105
Figure BDA0003342410680000106
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, />
Figure BDA0003342410680000107
is the angle range value specified in DL/T 1231 Power System Stabilizer Setting Test Guidelines at frequency f;/>
Figure BDA0003342410680000108
for />
Figure BDA0003342410680000109
and the sum of the angles behind the PSS itself,

Figure BDA00033424106800001010
Figure BDA00033424106800001010

其中,

Figure BDA00033424106800001011
表示PSS环节自身的相频特性。in,
Figure BDA00033424106800001011
Indicates the phase-frequency characteristics of the PSS link itself.

本发明的方法实现了在机组附加调差系数改变后,评估原PSS参数的有效性,并进一步修改PSS参数,解决了重新进行现场试验获取机组的无补偿相频特性并配置PSS参数效率低、耗资大的问题。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.

实施例二Embodiment two

本实施例提供了一种电力系统稳定器的参数整定系统;This embodiment provides a parameter setting system of a power system stabilizer;

一种电力系统稳定器的参数整定系统,包括:A parameter setting system for a power system stabilizer, comprising:

机组无补偿相频特性变化量计算模块,用于获取调差系数变化前后的电力系统和发电机的相关参数,计算不同频率下,调差系数变化引起的机组无补偿相频特性变化量;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;

机组相频特性理论值计算模块,用于获取原始调差系数下的试验相频特性,并结合机组无补偿相频特性变化量,计算不同频率下,调差系数变化后的机组相频特性理论值;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;

附加力矩滞后转速角度判断模块,用于基于调差系数变化后的机组相频特性理论值,判断初始电力系统稳定器参数下,每个附加力矩滞后转速角度是否处于合理范围内;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;

电力系统稳定器参数修正模块,用于基于判断结果,在存在附加力矩滞后转速角度不处于合理范围时,修正电力系统稳定器参数,直至所有附加力矩滞后转速角度范围处于合理范围内。具体被配置为:若所述附加力矩滞后转速角度处于合理范围内,则维持初始电力系统稳定器参数不变;否则,修正电力系统稳定器参数,直至所有附加力矩滞后转速角度范围处于合理范围内。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 .

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。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.

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。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 .

其中,发电机的相关参数包括:发电机基波角频率值、发电机的惯性时间常数、发电机的阻尼系数、发电机d轴同步电抗、发电机q轴同步电抗、发电机d轴暂态电抗、发电机与无穷大电力系统之间的联结电抗、机端电流的q轴分量、发电机端电压、发电机端电压在d轴的分量、发电机端电压在q轴的分量、发电机次暂态电势、发电机q轴同步电抗后的假想电势、包括联结电抗在内的发电机d轴暂态电抗和包括联结电抗在内的发电机q轴同步电抗;电力系统的相关参数包括电力系统电压和电力系统电压与q轴之间的夹角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

此处需要说明的是,上述模块对应于实施例一中的步骤,上述模块与对应的步骤所实现的示例和应用场景相同,但不限于上述实施例一所公开的内容。需要说明的是,上述模块作为系统的一部分可以在诸如一组计算机可执行指令的计算机系统中执行。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.

上述实施例中对各个实施例的描述各有侧重,某个实施例中没有详述的部分可以参见其他实施例的相关描述。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.

所提出的系统,可以通过其他的方式实现。例如以上所描述的系统实施例仅仅是示意性的,例如上述模块的划分,仅仅为一种逻辑功能划分,实际实现时,可以有另外的划分方式,例如多个模块可以结合或者可以集成到另外一个系统,或一些特征可以忽略,或不执行。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.

实施例三Embodiment three

本实施例还提供了一种电子设备,包括:一个或多个处理器、一个或多个存储器、以及一个或多个计算机程序;其中,处理器与存储器连接,上述一个或多个计算机程序被存储在存储器中,当电子设备运行时,该处理器执行该存储器存储的一个或多个计算机程序,以使电子设备执行上述实施例一所述的方法。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.

应理解,本实施例中,处理器可以是中央处理单元CPU,处理器还可以是其他通用处理器、数字信号处理器DSP、专用集成电路ASIC,现成可编程门阵列FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。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.

存储器可以包括只读存储器和随机存取存储器,并向处理器提供指令和数据、存储器的一部分还可以包括非易失性随机存储器。例如,存储器还可以存储设备类型的信息。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.

在实现过程中,上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。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.

实施例一中的方法可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器、闪存、只读存储器、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。为避免重复,这里不再详细描述。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.

本领域普通技术人员可以意识到,结合本实施例描述的各示例的单元及算法步骤,能够以电子硬件或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。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.

实施例四Embodiment four

本实施例还提供了一种计算机可读存储介质,用于存储计算机指令,所述计算机指令被处理器执行时,完成实施例一所述的方法。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.

以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。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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