Realization method of quasi-proportional resonant power system stabilizer

Abstract

The invention discloses a method for realizing a quasi-proportional resonant power system stabilizer, which includes the following steps: collecting an oscillation signal through a measuring link, obtaining a deviation signal through a DC blocking link, adjusting the deviation signal through a quasi-proportional resonant control link, and then outputting Compensate to the lead-lag link. Finally, the output signal is obtained after being limited by the limiting link, which is superimposed on the reference voltage of the generator excitation regulator to adjust the reference voltage. The invention overcomes the shortcoming that the traditional power system stabilizer cannot greatly increase the damping at the resonance frequency point to suppress the low-frequency oscillation of the resonance mechanism through the quasi-proportional resonance control, and realizes providing a large gain for the resonance oscillation mode only at the resonance frequency point, thereby The damping of the resonant oscillation mode is greatly improved, and the low-frequency oscillation of the resonant mechanism can be effectively suppressed without affecting other oscillation modes; the stabilizer of the present invention is simple in parameter design, convenient in implementation, and has high practical value.

Description

technical field [0001] The invention relates to the field of power system stability control, in particular to a method for realizing a quasi-proportional resonance type power system stabilizer. Background technique [0002] Low-frequency oscillation is one of the main problems that endanger the safe and stable operation of power systems. There are two main mechanisms for its generation: negative damping mechanism and resonance mechanism. Among them, the low-frequency oscillation of the resonance mechanism is caused by the frequency of the external periodic power disturbance source being close to the inherent low-frequency oscillation frequency of the system. [0003] The power system stabilizer is the main measure to suppress the low-frequency oscillation of the power system at present. It is based on the principle of phase compensation to suppress the low-frequency oscillation by adjusting the excitation reference voltage of the generator. The traditional power system stab...

AI Technical Summary

Problems solved by technology

The increase of the gain of the traditional power system stabilizer will affect the frequency range of the entire low-frequency oscillation. Therefore, the traditional power system stabilizer can only increase the damping of the oscillation mode to 0.1-0.3. If the damping of a certain mode is increased, will affect other oscillation modes, resulting in system instability

At present, traditional power system stabilizers are generally installed in the system to suppress low-frequency oscillations, and there is no special suppression device for resonance oscillations

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