Regional power grid wind power acceptance capability evaluation method

Abstract

The invention discloses a regional power grid wind power acceptance capability evaluation method, and relates to the technical field of power system scheduling automation. According to the regional power grid wind power acceptance capability evaluation method, a constraint factor method and a digital simulation method are combined, the allowable wind power acceptance capacities of a regional powergrid are evaluated from two aspects of peak shaving constraint and static safety constraint respectively, and the small value in the two is selected as the largest total wind power capacity allowed to be accepted by a region; finally, verification is carried out by utilizing transient simulation, and the maximum wind power acceptance capacity of the power grid in the whole region is obtained. Theinfluence of wind power access to the voltage of a substation bus is considered, the influence of wind power access to the regional power grid is reflected more truly, and the evaluation precision ofthe wind power acceptance capability of the regional power grid is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system dispatching automation, and in particular relates to a method for evaluating the wind power receiving capacity of a regional power grid. Background technique [0002] With the increasingly severe energy and environmental issues, the issue of energy conservation and emission reduction has received widespread attention worldwide. As a renewable and pollution-free green energy, wind power has been vigorously developed in recent years. However, due to the randomness and volatility of wind power 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, increa...

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Problems solved by technology

[0004] Among the existing evaluation methods, the "engineering method" is simple and easy to implement, but its evaluation error is relatively large, so it is rarely used; the "mathematical optimization method" constructs an optimization model and takes the safe and stable operation of the system as constraints. By solving the mathematical model, the allowable wind power receiving capacity of the regional power grid that meets the constraints is obtained. However, due to too many constraints, the calculated wind power receiving capacity value is too small, so it cannot accurately reflect the wind power receiving capacity of the regional power grid.

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