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Parameter tuning method of power system stabilizer

A power system and stabilizer technology, applied in the direction of circuit devices, AC network circuits, reducing/preventing power oscillation, etc., can solve the problems of inability to ensure the validity of parameters, increase damping, and inaccurate evaluation results, etc., to increase algorithm convergence and rapidity, increasing system damping, overcoming the effects of effectiveness

Inactive Publication Date: 2017-06-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The traditional power system stabilizer has insufficient damping, and the method of setting the parameters of the power system stabilizer in the prior art cannot ensure the validity of the parameters, which makes the evaluation result of the power system stabilizer's suppression of low-frequency oscillations inaccurate

Method used

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  • Parameter tuning method of power system stabilizer
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  • Parameter tuning method of power system stabilizer

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Embodiment Construction

[0034] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] Based on the mathematical model established by the single-machine infinite system, the third-order model of the synchronous generator is taken, namely: the transient electromotive force E' of the generator q , angular velocity ω, and rotor power angle δ are state variables; the excitation system is regarded as a simple proportional inertia link: that is, considering the excitation feedback voltage E fd is a state variable. Then the entire power system link can be regarded as a fourth-order model. In the case of small disturbances, the linearization equation of the entire system can be obtained as follows:

[0036]

[0037] In the formula: Δω is the incremental change of generator speed, Δδ is the incremental change of generator power angle, ΔE' q is the incremental change of the transient electromotive force of the generator, ΔE fd is the incremental cha...

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Abstract

The invention discloses a parameter tuning method of a power system stabilizer and belongs to the technical field of stable control of a power system. The power system stabilizer is designed aiming at a classic small interference four-order single machine infinite bus system model. A lead link, a resetting link and an amplification link are selected as master variables and a certain effective range is set; the master variables are optimized by utilizing a particle swarm algorithm; meanwhile, an inertia weight linear change manner is adopted in order to increase the fast convergence of the algorithm. By adopting the method disclosed by the invention, damping is effectively increased and low-frequency oscillation of a system is inhibited; meanwhile, the defect that the effectiveness of the parameters of the stabilizer cannot be ensured is overcome.

Description

technical field [0001] The invention relates to a parameter setting method of a power system stabilizer, which belongs to the technical field of power system stability control. Background technique [0002] The power system is a complex nonlinear system and has become an indispensable part of the national infrastructure. In the process of long-distance power transmission, due to the disturbance, the generator rotors of the original power system shake relative to each other, resulting in a negative damping effect. The overall damping condition of the system becomes very poor, generally relatively small or in a negative damping state. If the system works in this negative damping mode for a long time, low-frequency power oscillations will appear. The power system control mainly suppresses the low-frequency oscillation of the system through the damping controller, so as to improve the instability caused by small disturbances. Power system stabilizer is the most commonly used ...

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 万勇田红星杨晨
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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