Wind power plant virtual inertia increasing method based on wind-storage cooperative operation

A virtual inertia and wind farm technology, applied in wind power generation, electrical components, circuit devices, etc., can solve the problems of high demand for energy storage capacity, insufficient use of wind turbines, and high energy storage costs, so as to improve inertia and frequency stability , to avoid the effect of the second drop

Active Publication Date: 2018-04-24
STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

When the existing literature exists, it is still necessary to operate in a load-shedding state for a long time to reserve spare capacity, which sacrifices the maximum wind energy capture efficiency of the wind turbine; it will result in a high demand for energy storage capacity. Given that the current energy storage cost is still high, relying solely on The economy of energy storage to compensate the inertia of the wind field has yet to be considered, or the difference in the frequency...

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  • Wind power plant virtual inertia increasing method based on wind-storage cooperative operation
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  • Wind power plant virtual inertia increasing method based on wind-storage cooperative operation

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[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0051] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combin...

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Abstract

The invention discloses a wind power plant virtual inertia increasing method based on wind-storage cooperative operation. Fan operation features in different wind speeds are analyzed and zoning is performed on the wind speeds. Through detecting system frequency fluctuation and digging frequency adjustment potential and energy storage power features of the fan itself, system frequency fluctuation is responded with real time control of active power of a wind storage system, so that increase of a virtual inertia of the wind power plant is realized. According to the invention, wind-storage combined system inertia can be improved effectively, and also, the combined system can be enabled to give active power response to frequency fluctuation in multiple wind conditions and problems such as secondary falling of frequency can be avoided at the same time. Therefore, system frequency stability is improved.

Description

technical field [0001] The invention relates to a method for improving virtual inertia of a wind farm based on wind-storage coordinated operation. Background technique [0002] With the increase of wind power grid-connected capacity year by year, the intermittent and random characteristics of wind power output power make the connection of large-scale wind power generation bring new challenges to power system planning, operation control, protection, dispatching and other aspects. challenge. Among them, the double fed induction generator (DFIG) is the most widely used variable-speed constant-frequency wind turbine in wind farms. This type of wind turbine output active power through a power electronic converter with variable speed and constant frequency. The fan rotor is not directly connected to the grid. The synchronous unit uses the kinetic energy of the rotor to damp the inertial frequency response capability of the system frequency change. However, in a regional power g...

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Application Information

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IPC IPC(8): H02J3/38H02J3/24H02J3/48
CPCH02J3/386H02J3/24H02J3/48H02J2203/20Y02E10/76
Inventor 贾玉健李莉刘博施冬明于光波韩德顺沈倩李广巩晓静李嫣然
Owner STATE GRID SHANDONG ELECTRIC POWER
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