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Method for outputting active power by using smoothing permanent-magnet direct-driving wind power generating system of direct-current-side flywheel energy storage unit

A technology of wind power generation system and flywheel energy storage, which is applied in wind power generation, control system, control generator, etc., and can solve problems such as fluctuations in the output active power of wind power generators

Inactive Publication Date: 2012-01-25
CHONGQING UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the output active power of the wind power generating set fluctuates with the change of the wind speed, and provides a method for smoothing the output active power of the permanent magnet direct drive wind power generation system by using the DC side flywheel energy storage unit

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  • Method for outputting active power by using smoothing permanent-magnet direct-driving wind power generating system of direct-current-side flywheel energy storage unit
  • Method for outputting active power by using smoothing permanent-magnet direct-driving wind power generating system of direct-current-side flywheel energy storage unit
  • Method for outputting active power by using smoothing permanent-magnet direct-driving wind power generating system of direct-current-side flywheel energy storage unit

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Embodiment Construction

[0068] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0069] see figure 1 , figure 2 and Figure 6 , the present invention uses the flywheel energy storage unit on the DC side to smooth the method for outputting active power of the permanent magnet direct drive wind power generation system, and the control objects involved include: voltage Hall sensor 1, permanent magnet synchronous generator 2, current Hall sensor 3, Rotor position sensor 4, abc / dq coordinate transformation module 5, power outer loop control module 6, generator side current inner loop module 7, space vector modulator 8, motor side converter 9, abc / αβ coordinate transformation module 10, voltage Outer loop control module 11, grid side current inner loop control module 12, grid side converter 13, permanent magnet synchronous motor / generator 14, permanent magnet synchronous motor / generator q-axis current setting module 15, energy...

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Abstract

The invention discloses a method for outputting active power by using a smoothing permanent-magnet direct-driving wind power generating system of a direct-current-side flywheel energy storage unit. The method comprises the following steps of: controlling a motor-side converter; controlling a grid-side converter; and controlling an energy-storage-unit-side converter. By cooperated control of the motor-side converter, the grid-side converter and the energy-storage-unit-side converter, a wind power generator set can generate relatively-smoothed active output in the situation of change of a wind speed, and operating requirements of frequency modulation and voltage regulation of the system are met. The method has the advantages that: 1, based on the requirement of power smoothing control, maximum wind energy tracking control is realized; and 2, the network-side active power is smoothed, the quality of electric energy is improved, and the grid-connected operating characteristic of the wind power generating system is improved.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a method for smoothing output active power of a permanent magnet direct-drive wind power generation system by using a DC side flywheel energy storage unit, and belongs to the field of new energy power generation. Background technique [0002] The direct-drive wind power generation system using brushless permanent magnet synchronous generator eliminates brushes, slip rings and gearboxes, thus reducing system maintenance costs and improving system reliability. The permanent magnet synchronous power generation system based on dual PWM converters can realize variable-speed constant-frequency power generation operation and independent control of active and reactive power, with high power generation efficiency, relatively simple structure, and good operational stability. Because wind energy is an unstable energy source, the wind speed has the characteristics of uncontrollability, ina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02P21/14H02J3/38H02P21/22
CPCY02E10/766Y02E10/763Y02E70/30Y02E10/76
Inventor 姚骏熊倩廖勇陈西寅夏先锋
Owner CHONGQING UNIV
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