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A Design Method of Excitation Output Feedback Controller for Synchronous Generator

A technology of synchronous generator and output feedback, applied in the direction of synchronous generator control, control generator, control system, etc., can solve the problems of difficult state feedback and complex excitation control algorithm.

Inactive Publication Date: 2019-07-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a design method of a synchronous generator excitation output feedback controller, which solves the problems that the existing excitation control algorithm is complicated and the state feedback is difficult to realize in the power system

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  • A Design Method of Excitation Output Feedback Controller for Synchronous Generator
  • A Design Method of Excitation Output Feedback Controller for Synchronous Generator

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Embodiment Construction

[0051] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0052] The mathematical model established by the single-machine infinite system is selected as the analysis basis, and the third-order model of the synchronous generator is taken, that is, the transient electromotive force E′ of the generator is q , relative angular velocity ω (unit: rad / s), rotor power angle δ (unit: rad / s) are state variables, y 1 、y 2 As the output quantity, a third-order state-space system model is established, and the specific form is as follows:

[0053]

[0054] Among them, P e =E' q V s sinδ / X' ds Active power output for the generator, using per unit value; ω 0 is the synchronous speed of the generator rotor, in rad / s; V s System voltage amplitude; H is rotor inertia time constant, P m is the output power of the prime mover, using per unit value; D is the damping coefficient; X d Generator stator windin...

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Abstract

The invention discloses a design method of a synchronous generator excitation output feedback controller. First, a three-phase state space system model of a synchronous generator is built; then, the three-phase state space system model is reshaped equivalently into a four-phase state space system model by using a variable replacement method; then, an excitation controller is designed through output feedback; and finally, an optimized excitation controller is obtained by using a quadratic sum method. The existing excitation control algorithm is complex and state feedback cannot be realized in a power system. The method solves the problems in the prior art.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a design method of a synchronous generator excitation output feedback controller. Background technique [0002] With the development of the times, my country's power system has entered the stage of large power grids, large units, AC-DC hybrid long-distance transmission, and cross-regional networking, which determines that the power system will become more and more complex. The power system is a complex nonlinear system, and how to effectively ensure the stable operation of the power system has always been the research focus of researchers, among which suppressing the occurrence of low-frequency oscillations is the top priority. [0003] As an important part of the power system, the excitation control system directly participates in the operation control of the synchronous generator. Excitation control has developed from the initial single-variable pure p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/10H02J3/24H02P103/20
CPCH02J3/24H02P9/105H02P2103/20
Inventor 万勇田红星杨晨
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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