Power transmission planning under high proportion clean energy access

Abstract

The invention discloses a power transmission planning under high proportion clean energy access. The power transmission planning under high proportion clean energy access includes the steps: establishing and solving double layer planning models to obtain a planning scheme which enables the upper and lower layers of planning models to be relatively optimal, wherein as the upper layer planning modeltakes the line to be established, the flexibility unit to be established and the flexibility resource calling quantity as variables and takes the total investment of planning and the grid frame flexibility index as the target function to make decisions, the decision result is transmitted to the lower layer planning model through a system admittance matrix; and at the same time, through operationverification of different simulation scenes, the lower layer planning model takes the volume of the flexibility unit to be established and the flexibility calling quantity as the variables to optimizethe flexibility index and flexibility unit configuration, and returns the optimized flexibility index and flexibility unit configuration to the upper layer planning model through the calling total quantity of the flexibility resources and the construction volume of the adjustable unit to be established, so as to influence the variable parameters of the upper layer planning model. Therefore, the power transmission planning under high proportion clean energy access can effectively reflect the capability of accepting renewable energy sources of the electric power system, and can be adapted to the relatively higher proportion of renewable energy sources grid connection demand.

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...

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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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