Method for calculating optimal admitting ability for wind power multipoint access of regional power grid

Abstract

The invention discloses a method for calculating the optimal admitting ability for wind power multipoint access of a regional power grid and belongs to the technical field of wind power penetration methods of the power grid. The method for calculating the optimal admitting ability for the wind power multipoint access of the regional power grid comprises the steps that the installed capacity of all wind power plants is initialized, and data such as the local wind speed are acquired; the output condition of all the wind power plants is calculated, and unit commitment and optimization within all dispatching cycles are conducted, so that an annual unit commitment mode of an electric power system comprising the wind power plants is obtained; power flow calculation is conducted based on each period of time, whether an operation constraint condition of the system is met is verified, and a final objective function value is calculated after simulation is conducted on the system for more than 8760 hours; the installed capacity of the wind power plants is updated, optimized iteration is conducted on an objective function, and optimal solution of the wind power generating capacity is achieved, namely the optimal admitting ability of the power grid which enables the economical efficiency of the system to be optimized on the premise that the safety and stability constraint conditions are met is achieved. According to the method for calculating the optimal admitting ability for the wind power multipoint access of the regional power grid, an optimal wind power admitting capacity calculation model with the largest net earning of a wind power plant and power grid combination system (with the environmental benefit considered) as the purpose is established, and suggestions can be provided for the proper establishment of the installed capacity of the regional wind power plants.

Description

technical field [0001] The invention relates to a calculation method for the optimal acceptance capacity of wind power multi-point access in a regional power grid, and belongs to the technical field of wind power acceptance methods for power grids. Background technique [0002] As energy security issues and environmental issues become increasingly prominent, my country has intensified the development of renewable energy power generation, among which wind power has the fastest development. Although wind power has excellent emission reduction benefits, due to the randomness and volatility of its output, wind power grid integration will inevitably bring challenges to the safety and stability of the grid, which also makes its power generation economical lower than conventional thermal power generation. my country's Renewable Energy Law stipulates that the power grid must accept wind power in full. This policy requires the power grid to provide supporting grid-connected construct...

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Problems solved by technology

Although wind power has excellent emission reduction benefits, due to the randomness and volatility of its output, wind power grid integration will inevitably bring challenges to the safety and stability of the grid, which also makes its power generation economical lower than conventional thermal power generation

my country's Renewable Energy Law stipulates that the power grid must accept wind power in full. This policy requires the power grid to provide supporting grid-connected construction, increase operational backup and peak-shaving costs, which brings a certain economic burden to power grid companies and makes the power grid The enthusiasm of enterprises to adopt wind power is not high, resulting in problems such as excess wind power installed capacity and low utilization rate

On the one hand, the Renewable Energy Law stipulates that the power grid fully accepts wind power, and on the other hand, the power grid has requirements for safety, reliability, and economy, which make wind farm abandonment and installed capacity serious waste. Existing research mainly focuses on Considering the technical aspects of transmission capacity constraints and power grid peak-shaving capacity constraints, the maximum wind power capacity that can be accommodated by the power grid under the existing power structure is generally obtained, which cannot meet the requirements of system economy, safety and stability at the same time

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