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Modeling Method of Primary Frequency Modulation System of Wind Turbine Based on Pitch Control

A technology for pitch control and wind turbines, applied in electrical digital data processing, instruments, design optimization/simulation, etc., can solve problems such as lack of dynamic response speed and steady-state response, and lack of modeling work for dynamic response of primary frequency modulation of wind power

Active Publication Date: 2019-05-28
CHINA THREE GORGES UNIV
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  • Application Information

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Problems solved by technology

For primary frequency regulation of wind turbines, although a lot of work has been carried out on control strategies and regulation performance improvement, so far no modeling work has been done on the dynamic response of primary frequency regulation of wind power, so there is a lack of wind power mechanical power under system frequency disturbance. Mathematical Description Method of Adjusted Dynamic Response Speed ​​and Steady-state Response

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  • Modeling Method of Primary Frequency Modulation System of Wind Turbine Based on Pitch Control
  • Modeling Method of Primary Frequency Modulation System of Wind Turbine Based on Pitch Control
  • Modeling Method of Primary Frequency Modulation System of Wind Turbine Based on Pitch Control

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Embodiment Construction

[0051] In order to facilitate the understanding and implementation of the present invention by those of ordinary skill in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention. The block diagram of the primary frequency modulation input and output system based on pitch control in the present invention is as follows figure 1 As shown, each part of the control model is given by this figure.

[0052] The modeling method of the primary frequency regulation system of wind turbine based on pitch control includes the following steps:

[0053] Step 1: According to the aerodynamic model, find P m Per unit value P m-pu :

[0054]

[0055] In the above formula, ρ, R, λ, λ N , Β, β N , V w , V wN , Cp(λ,β), C pN (λ N ,β N ) Are air dens...

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Abstract

The invention relates to a dynamic response modeling method for a primary frequency modulation system of a wind turbine generator based on propeller pitch control. The method comprises the following steps: solving a small signal increment Delta Pm of mechanical power Pm; establishing a state variable for describing a power control ring; establishing a reference pitch angle beta ref and a mathematic model of a propeller pitch servo actuator; establishing a small signal increment state equation set of a propeller pitch primary frequency modulation input and output control system related to the variable according to the above-mentioned steps; constructing a system state space model and solving a system input and output transfer function. The invention aims to provide a dynamic modeling method for the primary frequency modulation system of a double-fed wind turbine generator for describing the dynamic response of the primary frequency modulation system of similar synchronous generator prime motor-governor, so as to grasp a mathematic description method for the primary frequency modulation response of the wind turbine generator under the disturbance of power system frequency.

Description

Technical field [0001] The invention relates to the technical field of system control and modeling of wind power generation, in particular to a method for modeling a primary frequency modulation system of a wind turbine based on pitch control. Background technique [0002] The primary frequency modulation of the synchronous generator includes the dynamic response process and the steady-state response process. The dynamic response process is described by the prime mover and governor dynamic model, which can reflect the mechanical power adjustment speed, and the static adjustment rate reflects the mechanical power Adjust the steady-state amplitude and the effect on the steady-state response of the system frequency. For the primary frequency modulation of wind turbines, although a lot of work has been carried out on the improvement of control strategies and regulation performance, no modeling work has been done on the dynamic response of the primary frequency modulation of wind turb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李世春
Owner CHINA THREE GORGES UNIV
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