Alternating current and direct current power grid section layered identification method considering different operation modes

Abstract

The invention discloses an alternating-current and direct-current power grid section layered identification method considering different operation modes, and relates to the field of alternating-current and direct-current hybrid power grid planning. The method specifically comprises the steps of obtaining a topological structure of a system, determining an upper limit value of a k coefficient according to a preset fault probability threshold value, retaining a fault scene with a relatively large probability, and determining a value of the k coefficient; changing the actual power of the converter station, and generating a plurality of operation modes based on a dual transformation method of a new energy unit and a thermal power unit; then performing layered section identification on fault scenes corresponding to different k coefficients in each operation mode; and finally, determining whether each power transmission section of the system operates safely according to a parallel identification result. The method is used for improving the section recognition efficiency of the alternating-current and direct-current hybrid system.

Description

technical field [0001] The present application relates to the field of AC / DC hybrid power grid planning, and in particular, to a method for layered identification of AC / DC power grid cross-sections considering different operation modes. Background technique [0002] The access of a large number of power electronic interfaces and the application of large-scale new energy make the power system develop rapidly towards the trend of high proportion of renewable energy and high proportion of power electronic equipment. "Double-high" power system has new and more complex features, such as the characteristics of primary energy, the number of components and the types of components are significantly different from traditional power systems. It is a major and urgent national need to identify the key sections of the "double-high" power system of the AC-DC hybrid power system under the access of new energy, and to ensure the safe operation of the AC-DC hybrid power grid. [0003] Howeve...

AI Technical Summary

Problems solved by technology

[0003] However, when identifying the key sections of the power grid, due to the actual operation mode of the system, the number of fault scenarios and the number of new energy scenarios, the calculation speed is slow

For the actual large-scale AC-DC hybrid power grid, the number of fault scenarios increases sharply, resulting in a significant decrease in the efficiency of section identification, and it is difficult to adapt to the computing needs of the actual large-scale hybrid power grid

Images