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Integrated frequency and damping control method for double-fed wind power generation unit

A doubly-fed wind power generation and comprehensive control technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as limiting the popularization and application of controllers

Inactive Publication Date: 2015-07-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control scheme of variable-speed wind turbine using PD controller to generate additional injected power and realize frequency regulation has a negative damping effect on the power oscillation of the grid, thus limiting the popularization and application of the controller.

Method used

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  • Integrated frequency and damping control method for double-fed wind power generation unit
  • Integrated frequency and damping control method for double-fed wind power generation unit
  • Integrated frequency and damping control method for double-fed wind power generation unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a frequency and damping integrated control method for a doubly-fed wind turbine, including the following steps:

[0021] a: Determine whether the power grid is running stably, if so, use the maximum power tracking control strategy to control the active power of the DFIG, if not, turn to step b;

[0022] b: After the grid frequency changes, adjust the output power of the doubly-fed wind turbine generator set, and the active power increment ΔP f for:

[0023] Δ P f = - K df dΔf dt 1 1 + s T D - K pf Δf - - - ( 1 )

[0024] Among them, K df 、K pf...

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Abstract

The invention discloses an integrated frequency and damping control method for a double-fed wind power generation unit. When the double-fed wind power generation unit normally operates, a maximum power tracking control policy is adopted; when system frequency is changed, a quick active control instruction is provided for participation in system frequency modulation of the wind power generation unit through a frequency controller, and the inertial frequency response of the wind power generation unit is simulated. The proportional differential control in the conventional frequency control of the wind power generation unit is improved into the proportional differential control with first-order inertia, so that the frequency control of the wind power generation unit is always shown as positive damping characteristics, the wind power generation unit have a frequency modulation control function and a system power oscillation suppression control function, and a foundation is laid for the wide application of the controller. After the frequency of a power grid is changed, the electromagnetic power of the wind power generation unit is quickly regulated by frequency control to participate in frequency modulation of the power grid; if a system is subjected to inter-area low-frequency oscillation, the wind power generation unit can suppress the power oscillation of the system under the control policy.

Description

technical field [0001] The invention relates to a frequency and damping comprehensive control method of a generator set, in particular to a frequency and damping comprehensive control method of a double-fed wind power generator set. Background technique [0002] The frequency regulation capability and damping of the power grid have an important impact on the safe and stable operation of the power system, and for regional power grids with a high proportion of wind power installed capacity, this problem will become more prominent. At present, proportional derivative (PD) controllers are mostly used for frequency regulation of variable-speed wind turbines. The df / dt differential control link and the proportional link of frequency droop characteristics are combined to superimpose them on the maximum power tracking control of wind turbines. . The research shows that the df / dt control link can quickly adjust the electromagnetic power of the wind turbine at the moment of the grid ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/24
CPCH02J3/24H02J3/386Y02E10/76
Inventor 张祥宇陈玉伟付媛
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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