A calculation method of available transmission capacity based on large-scale wind power grid connection
A technology of transmission capability and calculation method, applied in the computing field where transmission capability can be used, to achieve the effect of accurate calculation and improved prediction accuracy
Active Publication Date: 2019-12-03
STATE GRID SICHUAN ECONOMIC RES INST
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem in the prior art that the calculation of available transmission capacity only calculates the available transmission capacity of the system power flow section at a certain point in time in the power grid, and provides a method for obtaining short-term forecast data of wind farms On this basis, considering the evaluation time window, calculate the available transmission capacity of each grid-connected point to the load area at different times, compare the available transmission capacity, and find the appropriate wind power grid-connected point
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[0031] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.
[0032] Such as figure 1 As shown, a calculation method based on large-scale wind power grid-connected available transmission capacity includes the following steps:
[0033] Step 1: collect the original data of the wind farm, the original data of the wind farm includes the active output of the wind farm at each moment;
[0034] Step 2: Carry out forecast analysis based on the raw data of the wind farm to obtain the short-term forecast data of the wind farm;
[0035] Step 3: Based on the short-term forecast data of wind farms, when wind power is connected to the grid, the available t...
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The present invention discloses a calculation method capable of employing transmission capability based on large-scale wind power integration. The method comprises: collecting the original data of a wind power plant; performing prediction analysis according to the original data of the wind power plant, and obtaining the short-period prediction data of the wind power plant; calculating the available transmission capability of each grid connection point at a load region at different moments based on the short-period prediction data of the wind power plant when the wind power is subjected to grid connection; and calculating the fault probability corresponding to the available transmission capability based on the available transmission capability of each grid connection point at a load region at different moments based on the short-period prediction data of the wind power plant, and obtaining the probability distribution of the available transmission capability. The calculation method capable of employing transmission capability based on large-scale wind power integration takes the assessment time window into account on the basis of obtaining the short-period prediction data of the wind power plant, calculates the available transmission capability of each grid connection point at a load region at different moments and considers the influences of the wind power output volatility and the grid connection point on the available transmission capability so as to realize the accurate calculation of the available transmission capability, perform comparison by using the available transmission capability and find out appropriate wind power grid connection points.
Description
technical field [0001] The invention relates to the field of power system operation and control, in particular to a calculation method of available transmission capacity based on large-scale wind power grid connection. Background technique [0002] With the continuous development of wind power technology and the continuous increase of installed capacity of wind farms, the intermittency and volatility of wind power make it a disturbance source when connected to the grid, which has a great impact on the safe operation level of the power grid. In addition, most of my country's wind farms are far away from the load center and have a large capacity, while the construction of the power grid is relatively weak, and the difference in wind power grid connection points will have a greater impact on the operation of the power grid. Therefore, accurate short-term wind power forecasting, and using the prediction results to calculate the impact of wind power access on the available transm...
Claims
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IPC IPC(8): G06Q10/04G06Q50/06H02J3/38
CPCG06Q10/04G06Q50/06H02J3/386Y02E10/76Y04S10/50
Inventor 周友富张全明雷斌
Owner STATE GRID SICHUAN ECONOMIC RES INST