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Method for evaluating grid operation safety risk caused by wind farm power fluctuation

A technology for power grid operation and power fluctuations, applied to electrical components, circuit devices, AC network circuits, etc., to achieve the effect of promoting safe and reliable consumption of large-scale wind power and reducing adverse effects

Active Publication Date: 2013-08-14
NARI TECH CO LTD
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AI Technical Summary

Problems solved by technology

The current online security and stability analysis is based on the concept of determinism, and does not take into account the uncertainty of the grid operation mode caused by wind power fluctuations and the impact of wind power fluctuations on the grid

Method used

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  • Method for evaluating grid operation safety risk caused by wind farm power fluctuation
  • Method for evaluating grid operation safety risk caused by wind farm power fluctuation
  • Method for evaluating grid operation safety risk caused by wind farm power fluctuation

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Embodiment Construction

[0047] Refer to the attached figure 1 And the present invention is described in further detail in conjunction with examples.

[0048] figure 1 Step 1 described in is to gather basic information in the control center, including wind farm ultra-short-term power forecast information with probabilistic characteristics, as well as grid operation measured information, load forecast information, conventional unit generation plan information and maintenance plan information.

[0049] figure 1 Step 2 described in is to determine the initial moment to evaluate the wind farm power fluctuation, and select two consecutive moments t starting from this moment i and t i+1 , according to the measured / predicted wind power information, to judge the power fluctuation state of the wind farm in the grid.

[0050] If the wind farm in the power grid is in a state of sharp power fluctuation, proceed to step 3). If the wind farms in the power grid are in a state of gentle power fluctuation, the ri...

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Abstract

The invention discloses a method for evaluating a grid operation safety risk caused by wind farm power fluctuation, belonging to the technical field of power systems and power system automation. According to actually measured and ultra-short-term predication information of wind farm power, aiming at adjacent periods, a wind farm power fluctuation state is recognized and is judged to be a stable fluctuation state or a sharp fluctuation state, the result that safety stability margin cannot meet the requirement is used as a harm consequence, and a grid operation safety risk evaluation method is selected according to the wind farm power fluctuation state. The method for evaluating the grid operation safety risk caused by the wind farm power fluctuation has the advantages that the grid operation safety risk caused by the wind farm power fluctuation can be comprehensively evaluated, decision-making bases are provided for reducing the adverse impact caused by wind power fluctuation to operation safety, and the safe and reliable utilization of large-scale wind power is facilitated.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a method for evaluating the safety risk of power grid operation affected by wind farm power fluctuations. Background technique [0002] The fluctuating characteristics of wind power is the root cause of its impact on the safe and stable operation of the grid. When the installed capacity of grid-connected wind power grows to a certain scale, the uncontrollable fluctuation of wind power will cause harm to the safe and stable operation of the power grid. Assessing the risk of wind power output power fluctuations affecting the safe and stable operation of the grid, and then taking targeted prevention and control measures, is the basis for ensuring the safe and reliable consumption of wind power in the grid. [0003] The mandatory power industry standard "Guidelines for Power System Security and Stability" clarifies the ba...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 李碧君徐泰山刘强罗剑波尹玉君刘韶峰王昊昊
Owner NARI TECH CO LTD
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