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An IEEE 2A Power System Stabilizer (PSS) control parameter adaptive fitting method

A technology for controlling parameters and power systems, applied to electrical components, circuit devices, AC network circuits, etc., can solve the problems of non-repeatability of parameter setting process, difficulty in forming a standardized process, complicated calculation process, etc., to avoid repeated iterations Calculation and verification operations, rich functions, and the effect of simplifying the test process

Active Publication Date: 2018-12-14
STATE GRID GASU ELECTRIC POWER RES INST +2
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Problems solved by technology

The existing parameter setting method requires multiple manual iterative calculations and verification operations. The calculation process is complex, the calculation amount is large, the error is uncontrollable, the efficiency is low, and it is highly dependent on the experience of field technicians. The test takes a long time and the operation is difficult. The parameters The setting process is not repeatable and it is difficult to form a standardized process

Method used

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  • An IEEE 2A Power System Stabilizer (PSS) control parameter adaptive fitting method
  • An IEEE 2A Power System Stabilizer (PSS) control parameter adaptive fitting method
  • An IEEE 2A Power System Stabilizer (PSS) control parameter adaptive fitting method

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Embodiment 1

[0026] Example 1 An IEEE 2A-type PSS control parameter adaptive fitting method——Taking the PSS parameter tuning test of the #3 unit of the State Power Investment Corporation Xiaoxia Hydropower Station as an example

[0027] (1) KS2 parameter calculation

[0028] KS2 is the key parameter for the synthesis of electric power signal and speed signal in IEEE 2A type PSS. The value of KS2 is related to parameters such as generator speed, generator rated capacity, moment of inertia of the generator's entire shaft system, and time constant of the direct-blocking link of the electrical power signal input branch. These parameters are provided by the generator manufacturer. In the method provided by this patent, a KS2 calculation module is set, and the value of KS2 can be automatically calculated after inputting parameters such as generator speed.

[0029] Guodian Xiaoxia Hydropower Station #3 unit rated speed is 68.2n / min, and the moment of inertia of the entire shaft system is 30000kg.m 2 , ...

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Abstract

The invention belongs to the technical field of automatic control in a power system, in particular to an IEEE 2A type Power System Stabilizer (PSS) control parameter adaptive fitting method. The uncompensated characteristics of the generator excitation control system are obtained by an actual measurement test, after the optimal compensation characteristics of the PSS are calculated, an extreme value function taking minimization of the variance of the compensation characteristics and the optimal compensation characteristics of the PSS as the objective is established, the PSS control parameter adaptive fitting model is established based on the function and solved, and the parameters of PSS control system are finally obtained. The method realizes the automatic and fast fitting of PSS controlparameters of the uncompensated characteristics of the adaptive generator excitation control system, is simple to operate, avoids a large amount of repeated iterative calculation and calibration operation, and effectively improves the field work efficiency of testers.

Description

Technical field [0001] The invention belongs to the technical field of automatic control in power systems, and specifically relates to an IEEE 2A power system stabilizer (PSS) control parameter adaptive fitting method. Background technique [0002] The emergence and expansion of interconnected power systems and the large-scale application of rapid excitation systems have weakened the system damping of the power grid, and even negative damping has occurred. This makes the electrical quantities (current, voltage, power) of the power system subject to small disturbances as Periodic changes around its steady-state operating value, that is, power system oscillations. Among them, the oscillation mode whose oscillation frequency is in the range of 0.1-2.0 Hz is called low-frequency oscillation. When a low-frequency oscillation occurs in the power system, the unbalanced power that appears to propagate back and forth between the generator sets in the system causes the generator rotors to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 刘文飞拜润卿智勇郝如海陈仕彬张彦凯史玉杰邢延东高磊祁莹牛浩明周治伊张海龙
Owner STATE GRID GASU ELECTRIC POWER RES INST
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