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A power system stabilizer and its implementation method

A technology of power system and implementation method, applied in circuit devices, AC network circuits, reducing/preventing power oscillation, etc., can solve problems such as signal transmission time delay, achieve the effects of suppressing oscillation, solving parameter determination, and realizing feasibility

Active Publication Date: 2021-09-03
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a power system stabilizer and its implementation method, which solves the problem of signal transmission time lag

Method used

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  • A power system stabilizer and its implementation method
  • A power system stabilizer and its implementation method
  • A power system stabilizer and its implementation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The invention provides a method for realizing a stabilizer of a wide-area power system using generator power angle difference as an input signal. application feasibility.

[0055] Detailed description will be given below.

[0056] First of all, the embodiment of the present invention can select the vibration mode to be suppressed and the unit to install the wide-area power system stabilizer through the offline simulation calculation of the power grid. The disturbance test is carried out near the selected unit to obtain the power angle difference curve of the unit, and then combined with the Prony algorithm to obtain the residue of the oscillation mode, and finally obtain the control parameters of the wide-area power system stabilizer. Corresponding to the time delay of the WAMS system transmission signal, the linear interpolation algorithm is used to obtain it to ensure the real-time performance of the signal and the reliability of the wide-area power system stabilizer. ...

Embodiment 2

[0088] The method provided by the embodiment of the present invention may include the following steps:

[0089] 1) The determination of the parameters of the wide-area power system stabilizer and the solution to the signal delay problem, according to the off-line calculation needs to install the unit of the wide-area power system stabilizer;

[0090] 2) Confirm the residue of the oscillation mode that needs to be suppressed by online test;

[0091] 3) Then obtain the parameters of the wide-area power system stabilizer;

[0092] 4) Construct the model of wide-area power system stabilizer;

[0093] 5) Determine the control parameters of the wide-area power system stabilizer model, and finally superimpose the power angle difference signal on the voltage reference point of the generator excitation regulator after passing through the wide-area power system stabilizer, so as to realize the function of the power system stabilizer .

[0094] Among them: in step 1), firstly, accordi...

Embodiment 3

[0158] Based on the same inventive concept, the present invention also provides a power system stabilizer. Since the problem-solving principle of the device is similar to the implementation method of a power system stabilizer, the implementation of the device can refer to the implementation of the method. No longer.

[0159] image 3 shows a schematic structural diagram of the power system stabilizer in the embodiment of the present invention, as image 3 As shown, the power system stabilizer may include:

[0160] The input module 301 is used to input the power angle difference of the generator into the power system stabilizer as an input signal;

[0161] A processing module 302, configured to process the power angle difference signal by using the pre-calculated control parameters;

[0162] The output module 303 is configured to output the processed signal to the excitation regulator of the generator, the processed signal is superimposed with the voltage reference point of ...

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Abstract

The invention relates to a power system stabilizer and its implementation method, comprising: inputting the power angle difference of a generator as an input signal into the power system stabilizer; using pre-calculated control parameters to process the power angle difference signal; The signal is output to the excitation regulator of the generator, and the processed signal is superimposed with the voltage reference point of the excitation regulator and then output. The invention provides a power system stabilizer based on wide-area measurement signals, which increases system damping. Combined with the characteristics of the power angle difference signal changing slowly, this kind of wide-area power system stabilizer takes the power angle difference signal as input. At the same time, the Kalman filter can be used for both filtering and prediction, which solves the problems of wide-area measurement signal delay and measurement error, and ensures the normal operation of the wide-area power system stabilizer.

Description

technical field [0001] The invention relates to an implementation method and system in the field of high-voltage operation, in particular to a power system stabilizer and an implementation method thereof. Background technique [0002] Power System Stabilizer (PSS) is an additional excitation control technology researched to suppress low frequency oscillation. It introduces an additional signal ahead of the shaft speed in the excitation voltage regulator to generate a positive damping torque to overcome the negative damping torque generated in the original excitation voltage regulator. It is used to improve the damping of the power system and solve the problem of low frequency oscillation, which is one of the important measures to improve the dynamic stability of the power system. It extracts signals related to this oscillation, such as generator active power, speed or frequency, and processes them. The additional signals generated are added to the excitation regulator to ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 周成何凤军高磊江伟黄道姗张慧瑜
Owner CHINA ELECTRIC POWER RES INST