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Time domain simulation method for subsynchronous oscillation of doubly-fed wind power generator system

A sub-synchronous oscillation and wind turbine technology, applied in wind power generation, single-grid parallel feeding arrangement, etc., can solve problems such as sub-synchronous oscillation, fan off-grid, equipment damage, etc.

Inactive Publication Date: 2019-06-28
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when wind turbines are connected to the large power grid through series compensation lines or DC transmission lines, they will cause serious subsynchronous oscillations, causing a large number of wind turbines to go off-grid and equipment damage, which will have a bad impact on system stability.

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  • Time domain simulation method for subsynchronous oscillation of doubly-fed wind power generator system
  • Time domain simulation method for subsynchronous oscillation of doubly-fed wind power generator system
  • Time domain simulation method for subsynchronous oscillation of doubly-fed wind power generator system

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the present invention provides a time-domain simulation method for subsynchronous oscillation of a doubly-fed wind power generator system, the steps of which include:

[0024] (1) Establish the mathematical model of DFIG and transmission line; (2) Read in the original data; (3) Deduce the aerodynamic model; (4) Deduce the rotor shafting model; (5) Deduce the generator model; (6) ) to set the series compensation degree of the transmission line; (7) to set the wind speed of each fan; (8) to output the simulation graphics.

[0025] The above steps are described in detail below.

[0026] 1. Establish the mathematical model of double-fed wind turbine and transmission line

[0027] In order to obtain the time-domain simulation of subsynchronous resonance, a mathematical model of the entire system is established first. S...

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Abstract

The invention provides a time domain simulation method for the subsynchronous oscillation of a doubly-fed wind power generator system. The method comprises the steps of (1) establishing a mathematicalmodel of a doubly-fed wind turbine and a transmission line, (2) reading original data, (3) deriving an aerodynamic model, (4) deriving a rotor shaft system model, (5) deriving a power generator model, (6) setting transmission line string compensation, (7) setting the wind speed of each fan, and (8) outputting a simulation graph. The invention can be used for the time domain simulation of a subsynchronous oscillation phenomenon generated by the doubly-fed wind power generator system, therefore, the economic efficiency of the transmission is improved, the stability of an entire transmission system is maintained, and the significance is important.

Description

technical field [0001] The invention relates to a time-domain simulation technology, in particular to a time-domain simulation technology of subsynchronous oscillation of a doubly-fed wind power generator system. Background technique [0002] With the continuous growth of population, rapid economic development and severe environmental pollution, the human demand for energy continues to intensify. Vigorously developing clean, non-polluting and renewable new energy has become an inevitable choice for the prosperity and development of all countries. Wind energy is an inexhaustible renewable energy with surplus, and experts and scholars all over the world pay more and more attention to it. In recent years, China's wind power has developed very rapidly, and large-scale development of wind resources has become an indispensable part of our national energy strategy. As of the end of 2013, the installed capacity of wind power has reached 91412MW, accounting for 3% of my country's to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 付敏毕妍霜
Owner HARBIN UNIV OF SCI & TECH