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Operation control method of DFIG grid side and rotor side PWM converter

A grid-side converter and operation control technology, applied in the field of power system

Inactive Publication Date: 2017-01-11
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doubly-fed wind turbines in most wind farms mainly operate in the mode of unit power factor, and fail to give full play to their power regulation ability to participate in grid regulation

Method used

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  • Operation control method of DFIG grid side and rotor side PWM converter
  • Operation control method of DFIG grid side and rotor side PWM converter
  • Operation control method of DFIG grid side and rotor side PWM converter

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Embodiment Construction

[0076] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0077] Specifically from the following aspects:

[0078] Establishment of Mathematical Model of DFIG Grid-side PWM Converter

[0079] The main circuit of the doubly-fed wind turbine grid-side converter is as follows: figure 1 shown. In the figure, u ga , u gb , u gc are the phase voltages of the three-phase grid; i ga i gb i gc are the three-phase input current; v ga , v gb , v gc are the three-phase voltages on the AC side of the converter; U dc is the DC side voltage of the converter; C is the DC bus capacitance; i load is the load current on the DC side. main circuit, L ga , L gb , L gc Respectively, the inductance of each phase line reactor; R ga , R gb , R gc are the line resistances of each phase including the reactor resistance, respectively. In the DFIG wind power system, the load of the grid-side converter is the rotor-side c...

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Abstract

The invention discloses an operation control method of a DFIG grid side and a rotor side PWM converter. The operation control method is used to aim at engineering demands of grid-connected wind power generation system simulation analysis. A double-fed induction wind power generator grid side PWM converter mathematical model is established, and a grid side converter control method based on d-axis power grid voltage orientation is designed, and current tracking control and inverter direct current busbar voltage equalization control are realized. A rotor side converter mathematical model is established, and a DFIG rotor current control method of stator magnetic flux linkage orientation is designed. A 2MW double-fed asynchronous power generator simulation analysis model in a PLECS software platform is established and a sub-synchronous state, a super-synchronous state, and a transition process from the sub-synchronous state to the super-synchronous state are analyzed in a detailed way, and according to a result, the designed mathematical model and the control method are feasible.

Description

technical field [0001] The invention belongs to the field of electric power systems, relates to a grid-connected wind power generation system and its control, and specifically relates to a wind power generation system electromagnetic transient mathematical modeling and its software simulation technology and method. Background technique [0002] As one of the new energy power generation, wind power has become one of the renewable energy sources with the highest degree of scale development, the most mature technology and the fastest development speed in the world today. In recent years, wind power technology has developed rapidly all over the world, and wind power systems are undergoing a period of transition from small capacity to large capacity, from single wind turbine systems to large-scale wind farms, and from onshore wind power to offshore wind power. [0003] The doubly-fed wind power generation system adopts dual PWM converters for excitation control, which has the adv...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/386H02J2203/20Y02E10/76
Inventor 陆畅付晓智勇军
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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