Control method, system and device of doubly-fed motor system and readable storage medium

A technology of doubly-fed generator and control method, which is applied in the direction of generator control circuit, circuit device, control system, etc., can solve problems such as lack of research.

Inactive Publication Date: 2018-11-30
GUANGDONG UNIV OF TECH
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  • Control method, system and device of doubly-fed motor system and readable storage medium
  • Control method, system and device of doubly-fed motor system and readable storage medium
  • Control method, system and device of doubly-fed motor system and readable storage medium

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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] The embodiment of the present invention discloses a doubly-fed motor system control method, see figure 2 shown, including:

[0057] S1: According to the vector control strategy of the double-fed motor system, establish the mathematical model of the double-fed motor and obtain the system state equation;

[0058] Specifically, the stator of the doubly-fed motor is connected to the grid, and the rotor is connected to the AC excitation converter. At this ...

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Abstract

The present invention discloses a control method, a system, and a device of a doubly-fed motor system and a readable storage medium. The control method comprises the following steps: establishing a doubly-fed motor mathematical model according to a vector control strategy of the doubly-fed motor system, and obtaining system state equation(s); judging the fact that whether the doubly-fed motor system is in a chaotic state according to parameter(s) of the doubly-fed motor system; if the doubly-fed motor system is in the chaotic state, decoupling the system state equation(s), and obtaining decoupled multi-model composite state equation(s); and establishing control variable(s) according to the multi-model composite state equation(s), inputting the control variable(s) into the multi-model composite state equation(s) to control the doubly-fed motor system to separate from the chaotic state. According to the control method, the control variable(s) are established via the multi-model compositestate equation(s), and the doubly-fed motor system is controlled by using the control variable(s), so that the doubly-fed motor system in the chaotic state can separate from the chaotic state rapidlyand converge stably and rapidly. Compared with the prior art, the control method has the advantages of fast response rate, high control precision and strong robustness when the control method is usedfor controlling the doubly-fed motor system.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a control method, system, device and readable storage medium of a doubly-fed motor system. Background technique [0002] As a renewable clean energy, wind power has been widely used. At present, most of the motors used in wind power generation systems are doubly-fed induction generators, see figure 1 The doubly-fed motor system shown. [0003] Chaos phenomenon refers to the seemingly random irregular motion that occurs in a deterministic system, a transformation of stretching and folding. For a definite nonlinear dynamical system, the chaotic state is a non-convergent, non-divergent, non-periodic irregular motion, and the divergent state is characterized by a positive Lyapunov exponent. The Lyapunov exponent reflects the average exponential rate of divergence or separation between adjacent trajectories of the system in the phase space. Therefore, for a bounded dynamical sy...

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Application Information

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IPC IPC(8): H02P9/00H02J3/38H02P101/15
CPCH02J3/386H02P9/007H02P2101/15Y02E10/76
Inventor 黄宝洲杨俊华蔡浩然陈海峰
Owner GUANGDONG UNIV OF TECH
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