Power grid power transmission margin control method suitable for large-scale wind power access

A technology of power transmission margin and control method, applied in wind power generation, single grid parallel feeding arrangement, etc., can solve problems such as affecting the effect of network security constraints

Active Publication Date: 2014-10-01
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] With the continuous expansion of the scale of wind power access, due to the uncertainty of wind power output, the planned power flow is generally determined by the common factors of the start-up and stop of conventional generating units, output and wind ...

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  • Power grid power transmission margin control method suitable for large-scale wind power access
  • Power grid power transmission margin control method suitable for large-scale wind power access
  • Power grid power transmission margin control method suitable for large-scale wind power access

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Embodiment Construction

[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0056] Such as figure 1 As shown, the specific steps of the power grid transmission margin control method suitable for large-scale wind power access in this embodiment are:

[0057] Step 1: Obtain the basic data of the power grid, including the power grid model, various parameters of power equipment, operating parameters of generating units and probability distribution description of wind farms;

[0058] The power grid model includes the power equipment in the grid and the topological connection relationship between the equipmen...

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Abstract

The invention provides a power grid power transmission margin control method suitable for large-scale wind power access. The method includes the steps that (1), security constraint unit commitment optimal computation is carried out by adopting a mixed integer planning method to obtain starting and stopping states and power output plans of a conventional power generation unit meeting an objective function and constraint conditions; (2), the influence on power transmission margin by multi-period wind power randomness is quantized by adopting a probability power flow method to obtain a power flow probability distribution range of a power grid branch or a power transmission fracture surface; (3), whether the power flow probability distribution range meets the requirement of a confidence interval or not is judged, if not, the step (1) is executed again, unit commitment optimal computation is carried out again, and the power output plans are adjusted. Compared with the prior art, the power grid power transmission margin control method suitable for large-scale wind power access fully considers randomness of wind power, improves the using effect of short-period security constraint dispatching plans in a wind power access area and enhances performability of the short-period plans.

Description

technical field [0001] The invention relates to a power transmission margin control method, in particular to a power grid transmission margin control method suitable for large-scale wind power access. Background technique [0002] When wind power is connected to the grid, it is generally limited by the transmission section. When dealing with network constraints, the traditional day-ahead power generation plan is based on a deterministic planned power flow, that is, the next day’s system load forecast and bus load forecast are deterministic, while the next day’s The planned power flow is only determined by the start-stop and output of the generating units, and the day-ahead plan can control the planned power flow within a reasonable range by optimizing the start-stop and output of the generating units. [0003] With the continuous expansion of the scale of wind power access, due to the uncertainty of wind power output, the planned power flow is generally determined by the com...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46
CPCY02E10/76
Inventor 张传成丁强董炜戴赛崔辉许丹黄国栋蔡帜朱翊闫翠会门德月
Owner STATE GRID CORP OF CHINA
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