Method for implementing parallel power system stabilizer

A technology of power system and implementation method, which is applied in the parallel feeding arrangement of single network, controlling generator through magnetic field change, reducing/preventing power oscillation, etc., can solve the problem of large PSS amplitude, generator reactive power fluctuation, PSS compensation Insufficient degree and other problems, to achieve the effect of good adaptability, good amplitude-frequency characteristics and phase-frequency characteristics
CN101447679AActive Publication Date: 2009-06-03CHINA ELECTRIC POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA ELECTRIC POWER RES INST
Publication Date
2009-06-03

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Abstract

The invention provides a method for implementing a parallel power system stabilizer (PSS). The parallel PSS of the invention divides compensation frequency domain of the existing PSS into two sections and compensates the compensation frequency domain by two compensation branches respectively, wherein, in one compensation branch, a gain regulating link is used for improving the amplitude of a high-frequency section, while in the other compensation branch, a lag compensation parameter is used for solving the shortage of compensation in a low-frequency section. As the same as the existing PSS, the parallel PSS of the invention can improve the stability of the small perturbation of the system and inhibit the low-frequency oscillation in an interconnected system. Compared with the existing PSS, the parallel PSS of the invention improves the phase-frequency characteristic of the low-frequency section and the amplitude-frequency characteristic of the high-frequency section, thereby widening the working frequency domain of the parallel PSS of the invention, and inhibiting the reactive power fluctuation while the system is in normal operation.
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Description

technical field

[0001] The invention relates to a realization method of a parallel power system stabilizer, which belongs to the field of power system stability control. Background technique

[0002] The parallel power system stabilizer is an additional control of the excitation system of the synchronous generator. Its output signal is superimposed on the reference voltage of the generator excitation regulator. It provides positive feedback for different oscillation modes by adjusting the terminal voltage of the generator. The function of damping, its working principle is shown in the attached figure 2 . At present, a large number of self-shunt excitation static thyristor excitation methods are used in synchronous generators, which greatly reduces the time constant of the automatic excitation regulator (AVR). While improving the transient stability of the system, the fast excitation system reduces the damping of the power system under certain operating conditions, so that ...

Claims

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