A transmission network planning method under high proportion of clean energy access

Abstract

The invention discloses a transmission network planning method under the access of high-proportion clean energy. By establishing and solving a two-layer programming model, a planning scheme that makes the upper and lower two-layer planning models relatively optimal is obtained; because the upper-layer planning model , taking the lines to be built, the flexible units to be built, and the amount of flexible resource calls as variables, and the total investment in planning and grid flexibility indicators as the objective function to make decisions, and the decision results are transmitted to the lower-level planning model through the system admittance matrix, while The lower-level planning model passes the operation test of different simulation scenarios, takes the capacity of flexible units to be built and the amount of flexible calls as variables, optimizes the flexibility index and the configuration of flexible units, and uses the total amount of flexible resources to be called and the amount of adjustable The unit construction capacity is returned to the upper-level planning model, thereby affecting the variable parameters of the upper-level planning model. Therefore, the present invention can not only effectively reflect the ability of the electric power system to accept renewable energy, but also adapt to the grid-connected demand of a relatively high proportion of renewable energy.

Description

technical field [0001] The invention belongs to the technical field of power system planning. In particular, it relates to a transmission network planning method under the access of a high proportion of clean energy. Background technique [0002] Transmission network planning is an important part of power system planning. Its task is to determine the optimal transmission network grid structure according to the load and power generation changes during the planning period, so as to meet the safe and reliable transmission of electric energy and improve the construction and operation of the power grid. economy. [0003] With the continuous expansion of transmission network scale and the rapid development of clean energy, transmission network planning is facing more and more uncertain factors. The traditional power grid planning scheme is difficult to meet the requirements of new energy consumption and system optimization operation, and is no longer suitable for the current pow...

AI Technical Summary

Problems solved by technology

[0004] The evaluation work of the current multi-objective planning evaluation system of the transmission network is mainly carried out from the two aspects of the reliability and economic evaluation of the transmission network, which is not comprehensive enough to meet the current operation needs of the power grid under the influence of multiple uncertainties

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