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A reactive power damping controller and parameter tuning method based on flexible excitation system

A technology of damping controller and excitation system, applied in control system, controlling generator, reducing/preventing power oscillation, etc. It can solve problems such as difficult on-site application, difficulty in providing strong damping in multiple modes, complicated controller parameter setting design, etc. problems to achieve the effect of improving response performance

Active Publication Date: 2021-09-21
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional single-channel power system stabilizers, such as the widely used PSS2B, are difficult to provide strong damping in multiple modes at the same time due to the limitations of parameter setting
Although PSS4B can solve the problem of simultaneous suppression of low-frequency oscillations in multiple frequency bands, the three channels of PSS4B have coupling effects and mutual influence, and the setting design of controller parameters is complicated, which is not easy for field application

Method used

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  • A reactive power damping controller and parameter tuning method based on flexible excitation system
  • A reactive power damping controller and parameter tuning method based on flexible excitation system
  • A reactive power damping controller and parameter tuning method based on flexible excitation system

Examples

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Effect test

Embodiment 1

[0086] Such as image 3 A reactive damping controller based on a flexible excitation system for the 0.1Hz-0.5Hz frequency band is shown, which includes:

[0087] Two-way signal input terminals 110 and 120, which are respectively used to receive the rotational speed signal 108 and the electric power signal 109 representing the operating state of the unit;

[0088] An acceleration power signal synthesis link 140, which is used to synthesize and process the rotational speed signal 108 and the electric power signal 109 into an acceleration power signal 107 that can represent the power oscillation of the unit;

[0089] A band-pass filtering link 150, which is used to filter out non-predetermined frequency signals in the acceleration power signal 107 to obtain the acceleration power filter signal 106 within a predetermined frequency range;

[0090] Phase shift gain and output limiting link 160, which is used to provide the phase difference and gain ratio between the acceleration po...

Embodiment 2

[0138] This embodiment provides a reactive damping controller based on a flexible excitation system for the entire frequency range of 0.1 Hz-2.5 Hz. Will image 3 The band-pass filtering link of the reactive damping controller is canceled and set as a path, such as Figure 4 shown, which includes:

[0139] Two-way signal input terminals 110 and 120, which are respectively used to receive the rotational speed signal 108 and the electric power signal 109 representing the operating state of the unit;

[0140] An acceleration power signal synthesis link 140, which is used to synthesize and process the rotational speed signal 108 and the electric power signal 109 into an acceleration power signal 107 that can represent the power oscillation of the unit;

[0141] Phase shift gain and output limiting link 160, which is used to provide the phase difference and gain ratio between the acceleration power signal 107 and the oscillation damping control signal 105, and limit the output os...

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Abstract

The invention discloses a reactive damping controller and a parameter setting method based on a flexible excitation system. The controller of the present invention is composed of a dual-channel signal input terminal, an acceleration power signal synthesis link, a phase shift gain and output limiting link, and a control signal output terminal; the parameter setting method includes: setting the parameters of the acceleration power signal synthesis link, and establishing a flexible excitation system The theoretical non-compensation characteristic mathematical model of the reactive damping channel, the establishment of the reactive damping controller compensation characteristic mathematical model, the use of intelligent optimization algorithms to obtain the optimal solution of the control parameters of the phase shifting link of the reactive damping controller, and the use of the root locus method to obtain The critical gain is obtained, and the reactive damping controller gain is finally adjusted according to the damping calculation formula. The controller of the present invention can replace the power system stabilizer to provide damping to the full frequency band of low-frequency oscillation, and can also use its independent channel advantage to design a damping strengthening strategy for a specific frequency band, so as to improve the effect of excitation control on multi-mode low-frequency oscillation of the power system. full inhibitory effect.

Description

technical field [0001] The invention belongs to the related field of generator excitation additional control, in particular to a reactive damping controller and a parameter setting method based on a flexible excitation system. Background technique [0002] The power system stabilizer (PSS) based on the conventional excitation system is an effective and economical method to suppress the low-frequency oscillation of the power system. The control has the stable control requirement of simultaneously suppressing low-frequency oscillations in different modes. [0003] Traditional single-channel power system stabilizers, such as PSS2B, which is widely used at present, are difficult to provide strong damping in multiple modes at the same time in the low frequency band, mid frequency band and high frequency band due to the limitation of parameter setting. Although PSS4B can solve the problem of simultaneous suppression of low-frequency oscillations in multiple frequency bands, the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02P9/10
CPCH02J3/24H02P9/105
Inventor 张建承吴跨宇毛承雄张甜甜俞鸿飞段文华熊鸿韬楼伯良汪宗恒沈轶君房乐
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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