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Wind farm equivalent modeling method suitable for large-scale wind power grid-connected transient stability analysis

A technology of transient stability analysis and equivalent modeling, which is applied in the field of value modeling, can solve difficult application problems, and achieve the effect of easy engineering implementation and simple operation

Active Publication Date: 2017-11-07
STATE GRID CORP OF CHINA +3
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  • Application Information

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Problems solved by technology

[0006] (2) Determine the group division of wind farms by means of short-circuit calculation, which is difficult to apply in the equivalent research of large-scale wind power bases and large-scale wind power centralized access systems

Method used

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  • Wind farm equivalent modeling method suitable for large-scale wind power grid-connected transient stability analysis
  • Wind farm equivalent modeling method suitable for large-scale wind power grid-connected transient stability analysis
  • Wind farm equivalent modeling method suitable for large-scale wind power grid-connected transient stability analysis

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Embodiment

[0090] Figure 4 Shown is a schematic diagram of a detailed model of a wind farm in a grid-connected large-scale wind power base. The wind farm has a total installed capacity of 201MW and consists of 134 1.5MW double-fed variable-speed wind turbines. Among them, there are 67 A-type and B-type wind turbines. The feeder parameters in the wind farm are shown in Table 1.

[0091] Table 1

[0092]

[0093]

[0094] According to the group division method proposed by the present invention, the wind farm is divided into two groups A and B, and then according to the principle of cluster division, the two groups are divided into three clusters respectively, wherein in group A and group B There are 17 wind turbines in the most sensitive and insensitive clusters, and 33 wind turbines in the more sensitive clusters.

[0095] According to the feeder parameters of the wind farm given in Table 1, the parameters of the sending lines of group A and group B can be obtained after calcul...

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Abstract

The invention provides a wind farm equivalent modeling method suitable for large-scale wind power grid-connected transient stability analysis, by dividing the wind turbines in the wind farm into groups according to types and models, and then grouping the wind turbines in the same group According to a fixed ratio, it is divided into three categories: the most sensitive cluster affected by the fault, the more sensitive cluster and the insensitive cluster. The different clusters are aggregated and modeled using the method of single-machine multiplication, and the impedance parameters of equivalent lines are calculated according to the principle of line equivalence. Establish the wind farm equivalent model. The invention satisfies the need to reflect the actual characteristics of the wind farm with as few wind turbines as possible, is easy to operate, and is convenient for engineering realization, and is suitable for the transient stability research of the power grid after the 10-million-kilowatt wind power base and the large-scale wind power collection system are connected. has a positive meaning.

Description

technical field [0001] The invention relates to a modeling method, in particular to a wind farm equivalent modeling method suitable for large-scale wind power grid-connected transient stability analysis. Background technique [0002] With the sustained and rapid development of wind power in my country, wind power-based new energy has become the second largest power source in more than ten provinces including Northeast China, Inner Mongolia, and Gansu, and new energy is undergoing a historic transition from supplementary energy to alternative energy. . As a power source, wind power is intermittent and difficult to dispatch. Its impact on the safety and stability of the power grid is different from that of conventional synchronous generators. In order to accurately analyze the impact of large-scale wind power access on the safe and stable operation of the power grid, it is necessary to establish a system that can accurately respond to wind farm faults. Run the model of the fea...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 刘纯高峰张梅李庆贺敬张春宇张元栋梁剑
Owner STATE GRID CORP OF CHINA