A transmission network planning method considering flexible supply-demand balance

Abstract

The invention discloses a transmission network planning method considering flexible supply-demand balance, which comprises the following steps: according to flexible demand and supply under differenttypes and time scales, an evaluation index of power system flexibility considering supply-demand balance being established; based on the evaluation index of power system flexibility, considering economy, reliability and security, a bilevel transmission network expansion planning model being established; based on the bilevel expansion programming model of transmission network, the transmission network being planned. The method effectively solves the problem that the discarding of renewable energy in current system is seriously disjointed with the construction of power source and the planning ofpower network, at the same time, the invention can effectively solve the problem of economical and safe transmission of renewable energy pow generation in a high-proportion renewable energy system, can make scientific and effective guidance for grid planning work, and finally realize the optimization of resource utilization and the maximization of social benefit.

Description

Technical field [0001] The present invention relates to the field of power grid planning, and in particular, to a transmission grid planning method that considers flexible supply and demand balance. Background technique [0002] In order to cope with the deterioration of the global environment and the depletion of traditional energy sources, renewable energy power generation technology has developed rapidly, and the grid connection ratio has been continuously increased. China has proposed to increase the ratio of renewable energy power generation to 60% by 2050. By then, wind and photovoltaic power generation will become the main power sources in the system. However, due to the temporal and spatial distribution characteristics of renewable energy output, multi-temporal and spatial coupling brings strong uncertainty, and the problem of abandoning wind and light in the system has become increasingly prominent. The safe and stable operation of the power grid is facing severe challen...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a transmission network planning method that considers the balance of flexibility, supply and demand, effectively solves the problem that the current system's renewable energy is more seriously discarded and the power supply construction is out of touch with the power grid planning, and can effectively solve the high-proportion renewable energy system. Economical and safe delivery of energy power generation can provide scientific and effective guidance for power grid planning, and ultimately optimize resource utilization and maximize social benefits

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