Reactive power optimization method for power grid considering wind power uncertainty and voltage stability factors

Abstract

The invention discloses a power grid reactive power optimization method with wind power uncertainty and voltage stability being taken into consideration. The method comprises the following steps: 1) generating possible scenes of a plurality of wind power plants by utilizing a Latin hypercube sampling method, and simulating uncertainty of wind energy output by utilizing the scenes of the wind power plants; 2) with minimum expectation value of reactive power service cost and power grid active power loss being an objective function, and with power plant reactive power output being an optimization variable, establishing a wind power plant reactive power optimization model having constraint conditions according to the number of the preset possible scenes of the wind power plants; and 3) solving the wind power plant reactive power optimization model in the step 2) by utilizing a continuation power flow method, and verifying voltage stability of the reactive power optimization results.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a reactive power optimization method for a power grid considering wind power uncertainty and voltage stability factors. Background technique [0002] Renewable energy such as wind energy and solar energy has developed rapidly in China due to its cleanliness, economy, and sustainability. When more and more new energy sources are connected to the grid, the randomness of output power affects the safety and reliability of the system. , power quality, etc. Therefore, the planning and operation scheme of the power grid needs to be actively and moderately adjusted to build a safe, stable and economical power grid environment. As a part of power grid planning and operation, reactive power optimization planning can play a positive role in improving the security of the power grid, reducing power loss, promoting the rational distribution of reactive power flow in the power grid, and...

AI Technical Summary

Problems solved by technology

With further development, the reactive power price model takes into account factors such as the environment, harmonics, and grid frequency, and even studies the reactive power price based on comprehensive cost allocation on the basis of power flow composition analysis; according to the generator's operating curve Scholars They proposed a segmented reactive power bidding model; due to frequent changes in wind energy and light energy, it is difficult to obtain accurate prediction values ​​at present

The optimal solution obtained under a certain output situation may not be applicable in other scenarios, so traditional models and methods are not completely effective

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