A method and system for calculating the influence of excitation additional difference adjustment on dynamic damping of a synchronous generator

A technology of synchronous generator and excitation system, applied in the field of power system

Inactive Publication Date: 2018-12-18
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] The technical solution of the present invention provides a method and system for calculating the influence of the additional excitation adjustment on the dynamic damping

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  • A method and system for calculating the influence of excitation additional difference adjustment on dynamic damping of a synchronous generator
  • A method and system for calculating the influence of excitation additional difference adjustment on dynamic damping of a synchronous generator
  • A method and system for calculating the influence of excitation additional difference adjustment on dynamic damping of a synchronous generator

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Embodiment Construction

[0118] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0119] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a method and a system for calculating the influence of excitation additional difference adjustment on the dynamic damping of a synchronous generator, wherein the method comprises the following steps: a single-machine infinite bus system Philips-Heiferon mathematical model represented by K1, K2, K3, K4, K5 and K6 is expanded to establish a difference adjustment model considering additional difference adjustment which is represented by K1, K2, K3, K4, K'5, K'6. According to the eigenvalues of the state equations of the single-machine infinite bus system without error adjustment, the oscillation frequency of the single machine infinite bus system without error adjustment is solved; according to the eigenvalues of the state equations of the single machine infinite bus system with additional deviation adjustment, the oscillation frequency of the single machine infinite bus system with additional deviation adjustment is solved; and the damping torque coefficient KD ofthe excitation system without additional adjustment Xc=0 and the damping torque coefficient KD of the excitation system after additional adjustment Xc is not equal to 0 are calculated. The differencebetween the damping torque coefficient KD of the excitation system without additional adjustment Xc = 0 and the damping torque coefficient KD of the excitation system with additional adjustment Xc not equal to 0 is compared. The results show that the damping torque coefficient KD of the excitation system with additional adjustment Xc not equal to 0 is higher than that of the excitation system with additional adjustment Xc = 0.

Description

technical field [0001] The present invention relates to the technical field of electric power systems, and more specifically, relates to a method and system for calculating the influence of excitation additional adjustment on the dynamic damping of synchronous generators. Background technique [0002] With the development of UHV AC and DC large-scale interconnected power systems, the safe and stable operation of power systems is becoming increasingly important. The generator excitation system plays a very significant role in ensuring the stability of system voltage and reactive power. Most of the large power plants now use generator-transformer wiring, and the high-voltage side of the main transformer is connected in parallel to the same busbar. Therefore, if the excitation voltage of a unit in the same power plant changes, it will not only change the reactive power and voltage of the unit, but also affect the reactive power of other parallel operating units, thereby causin...

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 霍承祥吴剑超高磊马晓光李志强武朝强魏巍朱艳卿杨超李照庭黄兴于大海濮钧何凤军卜广全
Owner CHINA ELECTRIC POWER RES INST
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