A Robust Transmission Network Planning Method Considering Demand Response and n-1 Anticipated Failures

Abstract

The invention discloses a robust transmission network planning method of considering a demand response and N-1 expected failures. The power flow level of a whole network is reduced by adopting the demand response through collecting conventional technical parameters of a main network, obtaining historical data of renewable energy output and considering the renewable energy output uncertainty and power flow off-limit caused by the N-1 expected failures, and the line construction requirements of a transmission network are reduced. According to the robust transmission network planning method, an extreme scene set is generated according to extreme values of the historical data of renewable energy output, the proposed model is solved by adopting mixed integer programming, and a transmission network planning scheme capable of meeting the system security requirements under all extreme scenes is obtained through optimization. The line construction cost and the demand response cost can be flexibly adjusted through setting reasonable ratios of demand response resources at various load points, and the robustness and the economy of the transmission network planning scheme can be taken into account.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and more specifically relates to a robust transmission network planning method considering demand response and N-1 expected faults. Background technique [0002] The continuous growth of power load, the increasingly serious environmental problems and the widespread concern for economic benefits make the planning and operation of my country's power system urgently need to be changed. At the planning level, due to the gradual increase in the penetration rate of renewable energy such as wind power and photovoltaics in the power grid, the fluctuation and intermittency of its output will affect the reliability of power supply in the power grid; The content that cannot be ignored, ensuring that the optimized transmission network planning scheme passes each N-1 verification is the prerequisite for the safe operation of the system. Therefore, in order to alleviate the power flow limit that may be c...

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Problems solved by technology

[0004] Aiming at the above deficiencies or improvement needs of the prior art, the present invention provides a robust transmission network planning method considering demand response and N-1 expected faults, thus solving the possible problems caused by wind power uncertainty and N-1 expected faults. The trend crossing problem

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