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Transient tripping control method for out-going wind power base containing different types of draught fans

A control method and machine cutting technology, applied in wind power generation, reducing/preventing power oscillation, single-network parallel feeding arrangement, etc., can solve problems such as not considering the stability of wind turbines themselves

Active Publication Date: 2015-12-16
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research object is only for the same type of wind turbines, and does not consider the stability of the wind turbine itself

Method used

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  • Transient tripping control method for out-going wind power base containing different types of draught fans
  • Transient tripping control method for out-going wind power base containing different types of draught fans
  • Transient tripping control method for out-going wind power base containing different types of draught fans

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0102] The CIGREB4-39 wind farm grid-connected system is used for analysis. The generators in the system use detailed models and consider the voltage and speed control system. The wind-to-heat bundling ratio is 1:1.57, and the load adopts 70% constant impedance and 30% constant power. Static model. Assuming that at the 100th cycle, a three-phase short-circuit fault occurs in one of the double-circuit lines of the transmission line. After 0.32s, the transmission fault line is disconnected and the fault is cleared. Follow the steps of the above-mentioned external wind power base transient shutdown control method. CIGREB4-39 wind farm grid-connected system is calculated, and the results are shown in Table 1.

[0103] Table 1 Target values ​​calculated under different weight coefficients

[0104]

[0105] It can be seen from Table 1, when (β 1 ,β 2 )=(1.0,0.0), the transient energy cut-off control index I'of the power system after the wind power base cut-off is the largest. At this ti...

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Abstract

The invention relates to a transient tripping control method for an out-going wind power base containing different types of draught fans. The transient tripping control method comprises the following steps of calculating a total tripping quantity required by a power system with transient stability constraints under a fault and a tripping quantity of a thermal power generation unit when the power system is in an optimized wind-fire proportion tripping condition; carrying out parameter initialization, wherein initial parameters comprise a tripping quantity reduction value of a double fed induction generator (DFIG) unit, a tripping quantity increase value of a squirrel cage induction generator (SCIG) unit, an initial tripping quantity of the DFIG unit and an initial tripping quantity of the SCIG unit in the power system during adjustment of a tripping scheme; building a double-target tripping model with the purpose of making the rate between a transient energy tripping index of the power system and line power oscillation damping maximum; carrying out fuzzy calculation on the double-target tripping model, and adding a weight coefficient to obtain a double-target weighted fuzzy transient tripping model; and adjusting the weight coefficient, carrying out calculation on the double-target weighted fuzzy transient tripping model to obtain an allocation result of the tripping quantity of the DFIG unit and the tripping quantity of the SCIG. The transient tripping control method can be applied to transient tripping control of the wind power base.

Description

Technical field [0001] The invention relates to the technical field of wind power grid-connected technology, in particular to a method for controlling transient cut-off of external wind power bases containing different types of fans. Background technique [0002] With the continuous phased construction of the nine ten million kilowatt-level wind power bases planned by the country, on the one hand, the penetration rate of wind power installed capacity in the power system has been continuously increased, and on the other hand, a wind power base has been formed with different types of wind turbines. There is no shortage of large-scale wind power bases that mainly used squirrel cage induction wind generators (SquirrelCageInductionGenerators:SCIG) in the initial construction and gradually turned to large-scale use of double-fed induction wind generators (DoubleFedInductionGenerator, DFIG). Most of these wind power bases are relatively off-site and have small on-site absorption capacit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24
CPCY02E10/76
Inventor 李晖周明葛俊肖晋宇李庚银王智冬赵强董哲王佳明杨文华郭飞
Owner STATE GRID CORP OF CHINA
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