Doubly-fed fan full-wind-speed and initialized modeling based on low-voltage ride-through

A low-voltage ride-through and double-fed fan technology, which is applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as large manpower and material resources, equipment damage, affecting service life and operating safety

Pending Publication Date: 2021-02-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Problems solved by technology

[0003] For some existing wind farms, it will take a lot of manpower and material resources to conduct performance tests or use them in the developm

Method used

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  • Doubly-fed fan full-wind-speed and initialized modeling based on low-voltage ride-through
  • Doubly-fed fan full-wind-speed and initialized modeling based on low-voltage ride-through
  • Doubly-fed fan full-wind-speed and initialized modeling based on low-voltage ride-through

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Embodiment Construction

[0012] The invention will be described in further detail below in conjunction with the accompanying drawings. attached Figure 1a , 1b is the grid-connected simulation model diagram of the double-fed wind turbine. The 1.5MW double-fed wind turbine is composed of the prime mover of the fan, the generator, the converter on the rotor side, and the converter on the grid side. One end of the grid-side converter is connected to the stator of the doubly-fed wind turbine, and the other end is connected to the machine-side converter through the DC bus. The machine-side converter is connected to the rotor of the doubly-fed wind turbine. Between the side converter and the doubly-fed wind turbine, the hardware protection of low-voltage ride-through of the wind turbine is realized. The part of the doubly-fed wind power generation system connected to the power grid is mainly composed of low-voltage-medium voltage step-up transformers, low-voltage generators, line impedance, medium-voltage-...

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Abstract

The invention discloses a doubly-fed fan full-wind-speed and initialized modeling based on low-voltage ride-through. The invention discloses a modeling method for full-wind-speed and quick start initialization of a doubly-fed fan under low-voltage ride-through experimental data in the technical field of new energy. Along with the increase of the wind power proportion, the influence on the stability of the power grid is increasingly prominent, and the method has important significance for accurate modeling. According to the method, wind power plant modeling research is carried out according tolow-voltage ride through test data provided by a certain electric power science research institute, including operation conditions of different wind speeds, different voltage drop degrees and the like. The method comprises the following steps: constructing a quick start model of the doubly-fed wind turbine generator under full-wind-speed operation, judging the operation of the wind turbine generator and a low-voltage ride-through protection device according to measured data and curve analysis, and determining a control mode; in combination with the operation data, giving part of fan initialization parameters, so that the system model can be quickly started and stably operated within one second. The method provided by the invention can be used for accurately modeling an actual wind power plant, and has a relatively high actual application value for related tests of the wind power plant.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a full wind speed and initialization modeling method suitable for double-fed wind turbines based on low-voltage ride-through. Background technique [0002] Due to increasingly serious environmental and resource problems, low cost of wind energy utilization and mature technology, wind power has become a relatively fast-growing new energy power generation technology in the power system, and the development of wind power has become an extremely important measure to improve the economic operation of the power system. The single-unit capacity of wind turbines and the construction scale of wind farms are increasing day by day, but the randomness and intermittent nature of wind force will have a certain impact on the stable operation of the power system. With the continuous development of wind power generation systems, the low voltage of wind farms when the grid fails The...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/381H02J2203/20H02J2300/28Y02E10/76
Inventor 颜湘武孙颖李铁成
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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