AC-DC hybrid receiving-end power grid structure optimization method

Abstract

The invention provides an AC-DC hybrid receiving-end power grid structure optimization method, which comprises the steps of determining a to-be-optimized receiving-end power grid, and collecting and planning data of a reference year and a target year; preliminarily analyzing newly-built direct current drop points, types and access modes, and generating to-be-selected substations and line sets; establishing a two-layer structure optimization model of the AC / DC hybrid receiving end power grid; inputting different boundary conditions , adopting a Benders decomposition method to solve the structure optimization model to obtain candidate optimization schemes; and comprehensively evaluating the candidate optimization scheme by adopting a multi-level analysis method, and determining a final structure optimization scheme. According to the method, the scientificity of a power grid structure planning scheme can be improved, and coordination of safety, stability, energy consumption and economic targets is realized.

Description

technical field [0001] The invention relates to the field of power system planning and operation, in particular to a method for optimizing the structure of an AC / DC hybrid receiving end power grid. Background technique [0002] my country's primary energy and load are distributed in reverse. In order to meet the energy transmission at the sending end and the power demand at the receiving end, large-capacity DC transmission technology has been widely used. The characteristics of DC multi-feeding at the receiving end grid in the eastern and central regions are prominent. On the one hand, AC interacts with conventional / flexible DC, and the stability characteristics of the system have changed significantly compared with before, and safety and stability issues such as voltage stability and power angle stability have become prominent; The receiving level has become an important evaluation index for power grid development. The level of security and stability of the system and the ...

AI Technical Summary

Problems solved by technology

At present, the research on the structure optimization method of the traditional AC-DC power grid focuses on conventional DC, and uses indicators such as multi-infeed short-circuit ratio to conduct research, and proposes the DC drop point method and the AC grid construction method, and its adaptability to the characteristics of power electronics in my country's receiving power grid. Insufficient and unable to meet the needs of large-scale new energy and diversified DC power consumption in the receiving power grid

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