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Fan grid-connected control method based on virtual synchronous generator parameter self-adaptive control

An adaptive control and virtual synchronization technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as complexity of steps, inability to respond quickly, and difficulty in implementing differentiators

Active Publication Date: 2020-06-12
FUJIAN UNIV OF TECH
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Problems solved by technology

This patent modifies the virtual inertia control equation of double-fed wind turbines, avoiding the difficult problem of differentiators, and can easily consider the relative contribution of wind power virtual inertia control to the total inertia of the system, but when dealing with load disturbances, due to the complexity of the steps , cannot react quickly

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  • Fan grid-connected control method based on virtual synchronous generator parameter self-adaptive control
  • Fan grid-connected control method based on virtual synchronous generator parameter self-adaptive control
  • Fan grid-connected control method based on virtual synchronous generator parameter self-adaptive control

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] The invention provides a wind turbine grid-connected control method based on the adaptive control of virtual synchronous generator parameters, such as figure 1 As shown, the control system is connected in parallel on the AC bus output by the wind farm, and the control system includes an energy storage device, an inverter, a voltage sensor, a current sensor, an adaptive active power-frequency control module, a reactive power-voltage control module, a virtual Impedance control module and SVPWM control module, the energy storage device is connected in parallel to the AC bus output by the wind farm through the inverter, and the voltage sensor and current sensor respectively collect the voltage U of the control system and the grid-connected end of the wind farm abc and the output current I of the energy storage device abc , input t...

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Abstract

The invention relates to a fan grid-connected control method based on virtual synchronous generator parameter adaptive control. An AC bus output by a wind power plant is connected with a control system in parallel. The control system comprises an energy storage device, an inverter, a voltage sensor, a current sensor, a self-adaptive active-frequency control module, a reactive-voltage control module, a virtual impedance control module and an SVPWM control module, wherein the energy storage device is connected in parallel to an alternating current bus output by a wind power plant through an inverter; the voltage sensor and the current sensor respectively acquire the voltage of the grid-connected end of the control system and the wind power plant and the current output by the energy storage device, and inputs the voltage and current into the adaptive active-frequency control module, the reactive-voltage control module, the virtual impedance control module and the SVPWM control module forcalculation to obtain a driving signal of the inverter; and the output of the energy storage device is controlled to perform fan grid-connected control. The method is beneficial to improving the rapidity and stability of fan grid-connected control.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a wind turbine grid-connected control method based on the parameter adaptive control of a virtual synchronous generator. Background technique [0002] In recent years, with the in-depth research on new energy power generation technologies, wind power is being connected to the grid with a high penetration rate, which can provide cleaner and more sustainable energy support for the grid. However, when new energy is connected to the grid on a large scale, since the wind turbine based on the power electronic inverter interface has almost no rotational kinetic energy, when it is connected to the grid on a large scale, the inertia of the system will be reduced, resulting in Serious frequency oscillation problems may occur after being disturbed; when the system power fluctuates, the frequency may oscillate or even lead to frequency collapse, seriously threatenin...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32H02J3/18
CPCH02J3/32H02J3/1842Y02E70/30Y02E10/76Y02E40/30
Inventor 李培强夏正邦李俊男曹鹏程孙培栋商俊杰
Owner FUJIAN UNIV OF TECH
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