Method for PSS parameter optimization setting based on constraint mutative scale

A technology of parameter setting and scaling, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of inaccurate PSS parameters, insufficient dynamic damping, affecting conveying capacity, etc., and achieve high practical value and high practicality. Value and versatility

Inactive Publication Date: 2014-05-21
云南电网有限责任公司电网规划研究中心
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  • Description
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  • Application Information

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Problems solved by technology

The artificial processing of the data results in inaccurate and unreasonable PSS parameter setting, resulting in insufficient dynamic damping provided by the unit to the system and affecting the conveying capacity

Method used

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  • Method for PSS parameter optimization setting based on constraint mutative scale
  • Method for PSS parameter optimization setting based on constraint mutative scale
  • Method for PSS parameter optimization setting based on constraint mutative scale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 - PSS optimization setting of Xiaowan 1# machine

[0048] (1) Phase-frequency characteristic test of Xiaowan 1# machine. Such as figure 2 The data shown is named Xiaowan 1# Machine.xls.

[0049](2) Apply the optimization model of formula (1) and adopt the constrained variable-scale solution method to calculate the time constants T1~T6 of the lead-lag link of the PSS of Xiaowan 1# machine. Calculated to get:

[0050] T1=0.3501, T3=0.0584, T5=0.0930

[0051] T2=0.0377, T4=0.0050, T6=0.0062

[0052] (3) According to the PSS model and parameters, unit parameters and system parameters, calculate the amplification factor K of the parameter PSS PSS . After calculation, the K of Xiaowan 1# machine PSS The calculated value is:

[0053] K PSS =12.49

Embodiment 2

[0054] Example 2 - PSS optimal setting of Dachaoshan 1# machine

[0055] (1) Phase-frequency characteristic test of Dachaoshan 1# machine. As shown in the table below, the data is named Dachaoshan 1# Machine.xls.

[0056]

[0057]

[0058] (2) Apply formula (1) to optimize the model and adopt the constrained variable-scale solution method to calculate the time constants T1~T6 of the PSS lead-lag link of Dachaoshan 1# machine. Calculated to get:

[0059] T1=0.3113, T3=0.3105, T5=0.5005

[0060] T2=0.0208, T4=0.0207, T6=2.0000

[0061] (3) According to the PSS parameters, unit parameters and system parameters, calculate the amplification factor K of the parameter PSS PSS . After calculation, the K of Dachaoshan 1# machine PSS The calculated value is:

[0062] K PSS =14.30.

[0063] figure 1 In the PSS2A model parameter T 1 ~T 6 For the time constant of the lead-lag link, its optimal tuning method is the first part of the present invention; parameter K PSS is t...

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Abstract

A method for PSS parameter optimization setting based on a constraint mutative scale comprises a first step of obtaining phase-frequency characteristic data of a generator excitation system through a test or theoretical method; a second step of establishing an optimization model for solving a PSS lead-lag link time constant, adopting a constraint mutative scale method to solve the model, obtaining an optimum value of the PSS lead-lag link time constant of a machine set, and enabling the value to be an optimum setting value; and a third step of calculating an amplification coefficient of a PSS according to signal damping in the PSS, the excitation system and a generator link. A practical setting value needs to undergo test verification and is generally very close to a calculated value.

Description

technical field [0001] The invention belongs to the technical field of power system stability control. Background technique [0002] With the commissioning of a large number of generating units and the interconnection of the power grid, the dynamic damping of long-distance large-capacity transmission decreases, and in severe cases, low-frequency oscillations occur in the regional power grid, threatening the safe and stable operation of the power grid. At present, PSS (power system stabilizer) is mainly used to improve dynamic damping or suppress low-frequency oscillation. PSS is an additional component of the excitation system. It generates additional signals by extracting signals related to oscillation, so that the generator can generate additional damping torque and improve The dynamic damping of the system and the conveying capacity of each section can suppress the occurrence of low-frequency oscillation. [0003] Without proper PSS parameters, PSS cannot effectively pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24G06F19/00
Inventor 肖友强
Owner 云南电网有限责任公司电网规划研究中心
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