Method for regulating frequency domain based nonlinear power system stabilizer parameter

A power system stability and power system technology, applied in the direction of measuring electrical variables, general control systems, motor generator testing, etc., can solve the problems of NR-PSS unfavorable on-site operator parameter adjustment and use
CN101119094AActive Publication Date: 2008-02-06TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2008-02-06

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Abstract

The present invention discloses parameter regulating method of non-linear electricity system stabilizer based on frequency domain test and pertains to the technical field of stability control of electric power system. The present invention is characterized in that: test the non-frequency-compensation linear property curves and test the phase angle under different frequency points in the low frequency vibrating range of 0.2 to 2.0Hz from the output point of the stabilizer to the voltage of the generator after the working condition of tested machine unit is fixed; then calculate the lead and lag angle a 1 of the linear part of the output signals of the stabilizer under different frequencies, added with phase angle that has corresponding frequency property, and then decide whether surpass the lead and lag range relative with Delta Omega axle prescribed by national standard; if not surpass, the feedback factor k1, k2 and k3 of the linear part can be calculated out; then the damping coefficient C1 and the gain coefficient C2 can be decided with critical amplification times method and load phase step method. The present invention is easy to be comprehended by commissioning operators and is easy to be populated.
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Description

technical field

[0001] The technical invention belongs to the technical field of power system stability and control. Background technique

[0002] The excitation control of large generator sets is one of the most effective and economical technical means to improve the dynamic quality and transient stability of the power system. Current generator excitation regulators mainly use PID (Proportional Integral Differential Control), PSS (Power System Stabilizer) and LOEC (Linear Optimal Excitation Control), all of which are based on the approximate linearization model near the system operating equilibrium point. , thus ignoring the inherent nonlinear characteristics of the system. Although the NOEC (Nonlinear Optimal Excitation Control) designed based on the nonlinear mathematical model of the power system can effectively improve the stability of the power system, it is the same as the above three control methods. The mathematical model does not consider the uncertainty of the s...

Claims

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