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Multimodal subsynchronous oscillation adaptive damping control method and apparatus

A subsynchronous oscillation and damping control technology, applied in the direction of reducing/preventing power oscillation, can solve the problems of uncertain disturbance amplitude, limited capacity, output waveform distortion, etc., to avoid deep clipping and waveform distortion, realize capacity allocation, Realize the effect of variable gain control

Active Publication Date: 2017-01-04
TSINGHUA UNIV
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Problems solved by technology

However, in actual engineering, the capacity of the compensation device is limited (for example, the capacity of the SEDC is limited by the exciter), and the disturbance amplitude of the actual oscillation is uncertain. If the gain is too high, it may cause long-term deep limiting of the compensation signal, resulting in normal The excitation function is damaged, or the output waveform is distorted, resulting in harmonics that are not conducive to the power grid and the unit

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  • Multimodal subsynchronous oscillation adaptive damping control method and apparatus
  • Multimodal subsynchronous oscillation adaptive damping control method and apparatus
  • Multimodal subsynchronous oscillation adaptive damping control method and apparatus

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[0047]The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0048] The method and device for adaptive damping of multi-mode subsynchronous oscillation proposed according to the embodiments of the present invention will be described below with reference to the accompanying drawings. First, the adaptive damping of multi-modal subsynchronous oscillation proposed according to the embodiments of the present invention will be described with reference to the accompanying drawings. Control Method.

[0049] figure 1 It is a flow chart of the adaptive damp...

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Abstract

The invention discloses a multimodal subsynchronous oscillation adaptive damping control method and apparatus. The method comprises the following steps: obtaining multiple feedback signals in a control system after filtering; according to the multiple feedback signals after the filtering, obtaining amplitude and a damping ratio of each oscillation mode among multiple oscillation modes; according to the amplitude and the damping ratio of each oscillation mode among the multiple oscillation modes, adaptively adjusting a gain value of each oscillation mode among the multiple oscillation modes in the control system; and according to the gain value of each oscillation mode, distributing capacities to each oscillation mode among the multiple oscillation modes. According to the control method, the multiple oscillation modes can be taken into consideration, disturbance is automatically adapted, the control capacities are distributed among the multiple modes, variable gain control is realized, and deep amplitude limiting of compensation signals is avoided.

Description

technical field [0001] The invention relates to the technical field of power system stability and control, in particular to an adaptive damping control method and device for multi-mode subsynchronous oscillation. Background technique [0002] Since the incident of SSO (Subsynchronous Oscillation) damage to the shafting of the generator set in the 1970s, scholars at home and abroad have carried out a lot of research and development work, and proposed many methods to prevent and control SSO. Among them, SEDC (supplementary excitation damping controller, additional excitation damping controller) and GTSDC (generator terminal subsynchronous damping controller, machine terminal subsynchronous damping controller) are effective suppression measures commonly used in engineering. [0003] However, in practical engineering, the control of subsynchronous oscillation suppression measures such as SEDC and GTSDC needs to consider the following two issues: [0004] (1) Diversity of oscill...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 谢小荣张传宇刘华坤
Owner TSINGHUA UNIV
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