Method for compensating wind power plant virtual inertia by utilizing energy accumulation device

An energy storage device and virtual inertia technology, applied in the field of wind power generation, can solve problems such as low reliability and complex schemes

Active Publication Date: 2015-05-06
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, this solution is mainly aimed at achieving inertia compensation for wind turbines. For a wind farm consisting of dozens or even hundreds of wind turbines, it is necessary to coordinate and distribute the power released by the virtual inertia compensation of the wind farm among a large n

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  • Method for compensating wind power plant virtual inertia by utilizing energy accumulation device
  • Method for compensating wind power plant virtual inertia by utilizing energy accumulation device
  • Method for compensating wind power plant virtual inertia by utilizing energy accumulation device

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Embodiment Construction

[0084] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0085] The present invention aims at simulating the inertia characteristics of equal-capacity synchronous generators in wind farms, and obtains that the energy that needs to be released during the inertia response process of the two is equal, and then obtains that an energy storage device with an installed capacity of about 5% of the wind farm can make the wind farm generate and The similar inertia effect of equal-capacity synchronous generators can improve the frequency stability of large-scale wind power grid-connected systems. The specific implementation method is to measure the frequency deviat...

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Abstract

The invention discloses a method for compensating wind power plant virtual inertia by utilizing energy accumulation device; the method utilizing an energy accumulation device of about 5% of the rated installed capacity of the wind power plant is able to make the wind power plant generate a virtual inertia effect which is almost equal to a synchronous generator of the same capacity. The method generates active commands need to be output by the energy accumulation device by measuring the frequency bias and the frequency change rate at the outlet generatrix of the wind power plant, and processing the frequency bias and the frequency change rate with fuzzy logic. The energy accumulation device outputs power for compensating the virtual inertia of the wind power plant based on the commands. The method for compensating wind power plant virtual inertia by utilizing energy accumulation device effectively evaluates the capacity requirement of the energy accumulation device, and can be used for guide the energy accumulation configuration of the wind power plant; moreover, the structure of the controller thereof is simple, reliable and easy to be implemented, thus providing a foundation for developing a 'friendly' wind power plant, being beneficial to absorbing the large-scale wind power by the power grid, and increasing the safe and stable running level of wind power integration power system.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and more specifically relates to a method for compensating the virtual inertia of a wind farm by using an energy storage device. Background technique [0002] With the increase of grid-connected wind power capacity, the penetration rate of wind power continues to increase, which brings a series of challenges to the safe and stable operation of the power system, including frequency stability. Generally speaking, the direct coupling between the rotor speed of the conventional synchronous generator and the system frequency can directly respond to the change of the system frequency, has the function of damping the sudden change of the system frequency, and presents a certain inertia to the system. However, wind turbines controlled by frequency converters are usually completely decoupled from the system frequency, and the kinetic energy of their rotors is "hidden" by the control of frequ...

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Application Information

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IPC IPC(8): H02J3/38H02J3/28
CPCH02J3/28H02J3/386Y02A30/60Y02E10/76Y02E70/30
Inventor 刘巨文劲宇
Owner HUAZHONG UNIV OF SCI & TECH
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