Method and device for evaluating interaction effect between every two converter stations of multi-infeed direct current transmission system

Abstract

The invention relates to a method and device for evaluating the interaction effect between every two converter stations of a multi-infeed direct current transmission system, and belongs to the technical field of alternating current and direct current power system planning and operation control. Firstly, an interaction effect factor between every two converter stations of an original power network system and an interaction effect factor generated after a power network structure is changed are calculated; according to the interaction effect factors before and after the change, the contribution rates of various components to the interaction effect factor are calculated; finally, the sensitivity degrees of various nodes and circuits to the interaction effect factor are evaluated according to the obtained contribution rate. According to the method and the device, an index concept of the contribution rates of electrical components of an alternating current system is given, the theoretical calculating method is given, according to the given contribution rate index, the sensitivity of the various electrical components is evaluated, the result is suitable for guiding the arrangement of planning, designing and operation modes of a direct-current power network, and prevention work can be well prepared in advance for the high-risk operation mode.

Description

technical field [0001] The invention relates to a method and device for evaluating the interactive influence between converter stations of a multi-feed direct current transmission system, and belongs to the technical field of planning and operation control of AC and DC power systems. Background technique [0002] The distribution of power generation energy and power load in my country is extremely unbalanced. Coal resources are mainly distributed in the Northwest region. The six provinces of Shaanxi, Inner Mongolia, Shaanxi, Xinjiang, Ningxia and Guizhou account for 76% of the country's coal reserves; water resources are mainly distributed in the west of my country. The theory of water resources in the Southwest and Northwest Reserves account for 83% of the country's total, and technologically exploitable reserves account for 77% of the country's total. However, my country's power load demand is mainly concentrated in the central and eastern regions and coastal economically ...

AI Technical Summary

Problems solved by technology

The interaction factor MIIF can reflect the degree of interaction between converter stations, and it is believed that the electrical distance is the most important factor affecting the interaction factor, but the existing research results have not discussed in depth the interaction effect when the grid structure changes Factor trend

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