Double-fed machine set wind power station equivalent modeling system and method based on rotation speed grouping

A technology of doubly-fed units and equivalent modeling, applied in the field of value modeling, can solve the problem that the model is not suitable for the study of electromagnetic transient process of wind turbines

Inactive Publication Date: 2012-10-31
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0007] People's research on the equivalent model of variable speed and constant frequency wind farm still stays in the steady state model used for power flow calculation and the electromechanical transient model used for system transient stability analysis, and the above models are still not competent for the electromagnetic transient state of w...

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  • Double-fed machine set wind power station equivalent modeling system and method based on rotation speed grouping
  • Double-fed machine set wind power station equivalent modeling system and method based on rotation speed grouping
  • Double-fed machine set wind power station equivalent modeling system and method based on rotation speed grouping

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Embodiment Construction

[0089] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0090] Such as figure 1 As shown in the present invention, a double-fed unit wind farm equivalent modeling system based on speed grouping includes a fan operation information extraction unit, a unit grouping unit, and an equivalent machine parameter calculation unit connected in sequence; the fan operation information extraction unit Realize extracting the operating status information of all doubly-fed fans inside the wind farm from the wind farm control center; the function of the unit grouping unit is to divide each unit into several clusters according to the speed information of each fan; the equivalent machine parameter calculation unit Its function is to calculate the parameters of the equivalent machines of each cluster, so as to achieve the purpose of using several equivalent machines to equalize the electromagnetic transient p...

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Abstract

The invention discloses a double-fed machine set wind power station equivalent modeling system and method based on rotation speed grouping, wherein the system comprises a fan running information extracting unit, a machine set grouping unit and an equivalent machine parameter calculating unit which are sequentially connected. The method comprises the following steps that firstly the fan running information extracting unit extracts all rotation and mechanical power information of fault initial time of all to-be-equivalent fans for subsequent calculation; then the machine set grouping unit divides machine sets with similar rotation speed of fault initial time of the machine sets into a same machine group; and finally, the equivalent machine parameter calculating unit calculates each group of equivalence to be parameters of one double-fed machine set by adopting a volume weighting based parameter polymerization method, and thus a multi-machine electromagnetic transient state equivalent model which is subjected to equivalence of a wind power station. The system and the method provided by the invention provide a foundation condition for the influence research on the conventional relay protection for large-scale wind energy electromagnetic transient state value simulation calculation and switched power systems.

Description

technical field [0001] The invention relates to the technical field of equivalent modeling of wind farms, in particular to a wind farm equivalent modeling system and method for doubly-fed units based on speed grouping. Background technique [0002] With the rapid development of large-scale, high-concentration, and long-distance wind farm grid-connected forms, the electromagnetic transient simulation calculation of large-scale wind farms has encountered great difficulties, and the development of wind farm electromagnetic transient equivalent models has become a It is urgent to calculate the system fault numerical value and analyze the impact of wind power access to the power system on the existing protection devices. [0003] There are three main types of modern synchronous generator equivalent theory systems: Coherency-Based Equivalent, Modal Equivalent, and Estimation Equivalent. [0004] The coherence equivalent method is mainly used to analyze the transient stability of ...

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Application Information

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IPC IPC(8): G06F17/50
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 张保会王小立郝治国李光辉刘志远温靖华王辉
Owner XI AN JIAOTONG UNIV
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