Doubly-fed wind power generation virtual synchronous generator modeling method

A technology of virtual synchronization and modeling method, which can be used in wind power generation, greenhouse gas reduction, energy storage, etc., and can solve problems that need to be further deepened and explored.

Active Publication Date: 2020-03-24
ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] To sum up, most of the current literatures have modeled VSG or DFIG wind power generation systems with various approximations, but for DFIG wind power generation systems based on VSG, especially voltage-controlled DFIG wind power generation systems The research on power generation system modeling still needs to be further deepened and explored

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  • Doubly-fed wind power generation virtual synchronous generator modeling method
  • Doubly-fed wind power generation virtual synchronous generator modeling method
  • Doubly-fed wind power generation virtual synchronous generator modeling method

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Embodiment Construction

[0085] The present invention selects the doubly-fed wind power generation system circuit as one of the topological structures implemented in the case, such as figure 1 shown. The invention adopts a double-fed type wind power generating system fan unit, a long-line filter, a rotor side converter, a grid side converter, a DC filter capacitor and an LCL filter. The stator of the double-fed wind turbine is directly connected to the grid, and the rotor side is connected to the grid through the rotor-side converter and the grid-side converter. A DC link is formed between the rotor-side converter and the grid-side converter by a DC filter capacitor, and the LCL filter of the grid-side converter is connected to the grid as an output terminal.

[0086] The preferred modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0087] Specifically, the parameters in this embodiment are as follows: the rated power of the doubly-...

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Abstract

The invention discloses a doubly-fed wind power generation virtual synchronous generator modeling method based on Thevenin-Norton equivalence. The doubly-fed wind power generation virtual synchronousgenerator modeling method comprises the steps of sampling; changing a traditional doubly-fed fan modeling method, establishing a doubly-fed motor model based on Thevenin and Norton equivalence by utilizing the Thevenin-Norton equivalence theorem, mainly establishing a Thevenin equivalent mathematical model on the stator side of the doubly-fed motor and a Norton equivalent mathematical model on the rotor side of the doubly-fed motor. The modeling method greatly simplifies the algebraic equation calculation of the common connection part of the power grid, the doubly-fed motor stator and the grid-side converter, so that the algebraic equation calculation is more matched with a system mathematical model, and the physical significance is clearer.

Description

technical field [0001] The invention relates to a modeling method of a doubly-fed wind power generator, in particular to a modeling method of a doubly-fed wind power generation system based on a virtual synchronous generator. Background technique [0002] In recent years, with the rapid development of new energy sources such as wind power and photovoltaics, the proportion of new energy in the power grid has been increasing, forming a power system pattern with a high proportion of new energy grid-connected power generation. At present, the doubly-fed wind power generation system, which is the mainstream type of wind power generation, is directly connected to the grid on the stator side, and connected to the grid on the rotor side through a power electronic converter. It is difficult to provide sufficient damping and inertia, and it is difficult to play the role of the rotor inertia of the motor. , which will weaken the frequency regulation and voltage regulation capabilities ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/32Y02E10/76Y02E70/30
Inventor 刘芳刘辉李蕴红刘威汪浩东
Owner ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY
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