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Analysis method of wind power layout in regional power grid based on static voltage stability

A regional power grid and analysis method technology, applied in the direction of electrical digital data processing, data processing applications, instruments, etc., can solve problems that have not been considered, and achieve the effect of ensuring stable operation

Active Publication Date: 2017-11-07
STATE GRID CORP OF CHINA +4
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Problems solved by technology

[0005] However, the strength of the grid itself is also a decisive condition for determining whether the system can operate stably after the wind power is connected to the grid, but it has not been considered.

Method used

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  • Analysis method of wind power layout in regional power grid based on static voltage stability
  • Analysis method of wind power layout in regional power grid based on static voltage stability
  • Analysis method of wind power layout in regional power grid based on static voltage stability

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Embodiment Construction

[0048] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] like figure 1 as shown, figure 1 It is a flow chart of a regional grid wind power layout analysis method based on static voltage stability; the method of the present invention includes the following steps:

[0050] Step 1. Build a wind power connection reactive power characteristic model on the network model of the regional power grid, and determine the wind power connection location;

[0051] Step 2. Obtain the PV curves of the wind power connected to the busbar of the substation in the normal operation mode and the N-1 operation mode;

[0052] Step 3. Obtain the critical voltage of the wind power connected to the busbar of the substation according to the PV curve;

[0053] Step 4. Obtain the normal voltage of the bus according to the critical voltage and the static stability reserve coefficient of the system;

[0054] ...

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Abstract

The invention provides a static voltage stability-based analysis method for regional power grid wind power layout. The method includes: building a wind power access reactive power characteristic model on the network model of the regional power grid; obtaining wind power in normal operation mode and N-1 operation mode PV curve connected to the busbar of the substation; according to the PV curve, the critical voltage of the wind power connected to the busbar of the substation is obtained; the normal voltage of the busbar is obtained; The wind power capacity is theoretically accepted, and then the wind power capacity ratio in the regional power grid is obtained. According to the capacity ratio and the total amount of wind power access in the regional power grid, the wind power layout of each busbar in the regional power grid is obtained. This method uses the limit wind power access capacity of the substation bus to judge the relative ratio between the access capacity of this substation and the access capacity of other substations, and then use it to allocate the access capacity of each substation under a given planning capacity.

Description

technical field [0001] The invention relates to a method for researching wind power layout of a power system regional power grid, in particular to a method for analyzing wind power layout of a regional power grid based on static voltage stability. Background technique [0002] In recent years, the wind power industry has developed rapidly. However, wind power off-grid accidents also occur frequently, highlighting the lack of grid-connected standards and technological lag for wind farms. [0003] The wind power installed capacity that the grid can withstand is closely related to the system scale, power structure and distribution, and load characteristics of the grid. After the large-scale development of wind power, it is necessary to participate in the power balance of the system. When the large-scale wind power has a high simultaneous rate, the change of wind power output will cause a great impact on the power grid. Ensure the safe and stable operation of the power grid. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06Q50/06
Inventor 李琰王伟胜赵强刘纯王国军秦世耀杨文华迟永宁李玉芳苏媛媛王真孙蔚汤海雁张占奎魏林君王志冰
Owner STATE GRID CORP OF CHINA
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