Optimal selection method for grid-connected points of offshore wind farms
A technology for optimizing selection and wind farms, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as system stability issues that have not yet considered the problem of offshore wind power consumption
Active Publication Date: 2019-03-29
SHANGHAI ELECTRIC POWER DESIGN INST +1
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Problems solved by technology
The selection of traditional offshore wind power grid connection points generally only considers whether the transmission capacity of the regional grid grid can meet the demand for wind power transmission, but has not considered the problem of offshore wind power consumption and the stability of the system after a grid failure
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Embodiment
[0054] Such as figure 1 shown in figure 1 Taking Chongming Island Offshore Wind Farm as an example, the surrounding stations that can be connected to the grid include 220kV Chenjiazhen Station, 220kV Baobei Station and 220kV Changxing Station.
[0055] Step (a) Simulate the output characteristics of the wind farm and the load characteristics of the grid in the research area:
[0056] According to the ARMA model, the annual output characteristic curve of the wind farm can be seen in figure 2 .
[0057] According to the survey, the load characteristic curve of the regional power grid for one year is shown in image 3 .
[0058] Step (b) conduct a preliminary screening of the grid-connected points of the offshore wind farm in the regional power grid:
[0059] According to the output characteristic and load characteristic curve of the wind farm in step (a), the power flow calculation is performed on 8760 time sections, and the maximum load rate of the three grid-connected po...
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The invention discloses an optimization selection method for grid-connected points of an offshore wind power plant. Adequacy and safety of a regional power grid in a calculation period (such as one year) are determined by combination of output characteristic and grid-connected points of the wind power plant, load characteristic of the regional power grid, a power-grid grid structure, and power supply output constraint, for comparing and analyzing the consumption capability of the regional power grid under different grid-connected points on the offshore wind power, and relatively good grid-connected points are screened preliminarily; for the preliminarily-screened grid-connected points, a grid reinforced scheme set is formed; specific to each grid reinforced scheme, re-calculation on time facture surfaces which do not satisfy the adequacy and safety of the regional power grid is carried out from the preliminarily-screened calculation, so as to satisfy the adequacy and safety constraint conditions of the power grid; and finally, by taking the minimum investment as an objective, the optimal grid-connected point of the offshore wind power plant is obtained. By taking the minimum investment cost as the objective, and by comprehensive consideration of the influence to the power grid after offshore wind power grid connection, and the power-grid grid reinforced schemes, the optimal grid-connected point of the offshore wind power is obtained.
Description
technical field [0001] The invention relates to the technical field of grid-connection of wind power generation, in particular to a method for optimally selecting a grid-connection point of an offshore wind farm. Background technique [0002] In order to cope with climate change and advocate sustainable development, my country's energy is transforming to a low-carbon and high-efficiency development model. Driven by the national new energy strategy and policy, wind power has become the main method of new energy application in my country. Both onshore and offshore wind power are developing together, and the installed capacity is increasing year by year. Offshore wind power has huge advantages such as high wind speed, continuous and stable wind resources, large single-unit capacity, no noise restriction, no land occupation, closer to the grid load center, and easy grid connection and utilization. Its large-scale development has become the focus of my country's current wind powe...
Claims
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IPC IPC(8): H02J3/38
CPCH02J3/386H02J2203/20Y02E10/76
Inventor 陈云辉曹娜袁智强张开华褚浩君
Owner SHANGHAI ELECTRIC POWER DESIGN INST