Control method of doubly-fed wind turbines participating in power grid frequency regulation based on self-resetting integrator
A doubly-fed wind turbine and control method technology, applied in wind power generation, complex mathematical operations, etc., can solve the problems of power grid inertia reduction, insufficient frequency modulation capability, etc., and achieve the effect of optimizing operating conditions
Active Publication Date: 2020-08-11
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a doubly-fed wind turbine based on a self-resetting integrator to participate in the power grid frequency modulation control method, which solves the problems of grid inertia reduction and insufficient frequency modulation capability.
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[0064] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0065] Such as figure 1 As shown, a doubly-fed wind turbine based on self-resetting integrator participates in the power grid frequency regulation control method, including the following steps:
[0066] S1. Calculate the AGC signal ΔP of the wind power plant through the energy management system (EMS) of the dispatch control center W , through the communication channel and the remote terminal unit (RTU) installed in the pow...
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The invention discloses a self-resetting integrator-based control method for doubly-fed wind turbines participating in power grid frequency regulation. The present invention eliminates the adverse effect of the above hysteresis effect by introducing a self-resetting integrator on the basis of the existing wind turbine full wind speed control method. In order to achieve the required power limit level, the present invention first controls the rotational speed of the wind turbine by adjusting the electromagnetic torque, and then adjusts the pitch angle to limit the power output when necessary, thereby optimizing the operating conditions of the pitch angle servo mechanism. At the same time, by introducing the AGC control signal, the fan unit converts the above-mentioned reserve capacity into active power support, thereby realizing its active response to the AGC under certain conditions, enabling the double-fed fan to better participate in the secondary frequency regulation of the power grid, and solving the problem of grid inertia reduction and frequency regulation Insufficient capacity and other issues.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to a control method for doubly-fed wind turbines participating in power grid frequency regulation based on a self-resetting integrator. Background technique [0002] As the main type of grid-connected doubly-fed wind turbine, its power electronic converter shields the coupling relationship between the unit and the grid frequency, so that the wind turbine cannot provide the inertial response capability and frequency modulation capability similar to the synchronous generator. Therefore, a high proportion of wind power connected to the system will inevitably lead to problems such as reduced grid inertia and insufficient frequency modulation capabilities. Therefore, grid-connected guidelines at home and abroad clearly state that grid-connected wind turbines must provide frequency modulation auxiliary services. [0003] In the case of full wind speed, the output of wind tur...
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IPC IPC(8): G06F17/10
CPCY02E10/76
Inventor 王德林杨仁杰刘柳康积涛
Owner SOUTHWEST JIAOTONG UNIV