Virtual synchronous motor control method with adaptive instruction filter inversion

A virtual synchronous motor and control method technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of large system modeling errors, solve calculation expansion, suppress power fluctuations and inrush current generation, The effect of ensuring system convergence

Pending Publication Date: 2019-10-22
NANJING INST OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0005] Aiming at the existing problems, the present invention proposes a virtual synchronous motor control method...

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  • Virtual synchronous motor control method with adaptive instruction filter inversion
  • Virtual synchronous motor control method with adaptive instruction filter inversion
  • Virtual synchronous motor control method with adaptive instruction filter inversion

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Embodiment Construction

[0045] In order to further describe the technical features and effects of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] 1. Topology structure corresponding to the embodiment

[0047] Such as image 3 As shown, the controller topology adopted by the embodiment of the present invention. The nonlinear signal generated by the adaptive command filter controller is added to the control of the virtual synchronous motor, and the frequency and phase of the system output voltage are still obtained from the rotor equation, and the back EMF is synthesized and then the PWM conversion is performed.

[0048] 2. Implementation of the method of the present invention

[0049] Such as Figure 5 As shown, the backstepping method is used to design the controller, and the intermediate virtual control quantity and the Lyapunov function are selected in sequence to ensure the system convergence, and...

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Abstract

The invention provides a virtual synchronous motor control method with adaptive instruction filter inversion. The method comprises the following steps: a third-order nonlinear state space model is built; and a controller is acquired according to the third-order nonlinear state space model. Through modeling of an ideal synchronous motor rotor equation and a torque part, an adaptive instruction filter inversion controller is designed, smooth switching of a system grid-connected process can be realized, power fluctuation is reduced, and practical engineering application is facilitated.

Description

Technical field [0001] The invention relates to the technical field of distributed power generation micro-grid, in particular to a method for adopting an adaptive command filtering inversion controller to add a non-linear compensation signal in the control of a virtual synchronous motor to improve system stability. Background technique [0002] Distributed energy sources are connected to the grid on a large scale through grid-connected inverters, and distributed power sources based on power electronic inverters are often due to lack of inertia. When the system is disturbed, its output response speed is too fast, and various performance parameters change suddenly. Affect the stable operation of the power grid. The virtual synchronous generator (VSG) control method simulates the external characteristics of the traditional synchronous generator by introducing a rotor swing equation, constructing a virtual inertia and a frequency modulation command, and providing voltage and frequenc...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/381H02J2203/20
Inventor 杨成顺杨帆张东东黄宵宁
Owner NANJING INST OF TECH
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