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Doubly-fed wind turbine generator set-based inertia control system and method

A doubly-fed wind turbine and inertia control technology, applied in control systems, wind power generation, control generators, etc., can solve problems such as poor frequency stability of the power grid, and achieve smooth control with remarkable effects

Active Publication Date: 2016-11-16
ZHEJIANG WINDEY
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AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of poor grid frequency stability caused by the existing wind power grid-connected mode, the present invention provides an inertia control system and method based on doubly-fed wind turbines that can effectively solve the problem of frequency stability under high wind power penetration

Method used

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  • Doubly-fed wind turbine generator set-based inertia control system and method
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  • Doubly-fed wind turbine generator set-based inertia control system and method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] refer to Figure 1 ~ Figure 2 , an inertia control system based on doubly-fed wind turbines, including:

[0033] The grid frequency detection module is used to quickly and accurately detect the grid frequency;

[0034] The inertia response control module is used to control the torque and speed of the wind turbine respectively based on the detected grid frequency change;

[0035] In the inertia response control module, the inertia response characteristic of a synchronous machine with a fixed inertia time constant is simulated, and the torque command is transmitted to the converter; the speed command is used for the main control to control the running speed of the generator, and the limit of the speed control loop The parameters will be adjusted in real time according to the grid frequency and the operating conditions of the unit.

[0036] An inertia control me...

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Abstract

The invention provides a doubly-fed wind turbine generator set-based inertia control system, which comprises a power grid frequency detection module and an inertia response control module, wherein the power grid frequency detection module is used for quickly detecting a power grid frequency at high precision; the inertia response control module controls torque and a rotating speed of a wind turbine generator set separately according to the detected power grid frequency change as a basis; simulation of inertia response characteristics of a synchronous machine of a fixed inertia time constant is achieved and a torque command is transmitted to a converter; and a rotating speed command is applied to a master control to carry out running speed control on generators and an amplitude limiting parameter of a rotating speed control loop is adjusted in real time according to the power grid frequency and the operating condition of the set. The invention further provides a doubly-fed wind turbine generator set-based inertia control method. The problem of the frequency stability at high permeability of wind power is effectively solved.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a control system and method for doubly-fed wind turbines participating in power grid frequency regulation. Background technique [0002] With the increasing proportion of wind power in the power structure, its impact on the safe and stable operation of the power system is becoming more and more significant. The contradiction between wind power development and system safety operation in some areas has gradually emerged, and the wind curtailment phenomenon continues to appear. Wind power consumption has become a key issue affecting the healthy development of China's wind power. Then, due to the increasing proportion of wind power in the power system and the wide application of variable speed constant frequency wind power technology, wind power grid integration has brought new challenges to the stable operation of the power system. And other issues. Therefore, it is an inevitab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/00H02J3/38H02P101/15
CPCH02J3/386H02P9/00H02P2101/15Y02E10/76
Inventor 杨靖许国东应有孙勇李照霞朱长江
Owner ZHEJIANG WINDEY
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