Hybrid simulation-based electromagnetic direct-current model automatic adjustment method and system

Abstract

The invention relates to a hybrid simulation-based electromagnetic direct-current model automatic adjustment method and system. The method comprises the steps of obtaining initial running condition information from electromagnetic side power flow data, and assigning initial values to initialized information components of a pre-built electromagnetic direct-current model; based on control process parameters of the information components in the initial running condition information, adjusting a current running state of the electromagnetic direct-current model; and when current running state dataafter adjustment is consistent with the electromagnetic side power flow data, switching off a clamping power supply on a converter bus, thereby enabling the electromagnetic direct-current model and anelectromechanical side power grid to form a closed loop through a hybrid simulation interface, and starting hybrid simulation. Therefore, quick and automatic adjustment of running conditions of the electromagnetic side direct-current power transmission model in electromechanical-electromagnetic hybrid simulation of a large-scale alternating-current and direct-current power grid is realized; the workload of manual adjustment of running modes of the electromagnetic direct-current model during the hybrid simulation of the alternating-current and direct-current power grid is greatly reduced; quick adjustment of the running modes of the direct-current electromagnetic model is realized; and the simulation efficiency is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of power system simulation analysis, and in particular relates to an electromagnetic direct current model automatic adjustment method and system based on hybrid simulation. Background technique [0002] As UHV AC and DC projects have been put into operation one after another, the problem of "strong DC and weak AC" in the system has become prominent, the interaction between AC and DC and multiple DCs has become increasingly significant, and the operating characteristics of the power grid have become increasingly complex. In recent years, electromechanical-electromagnetic hybrid simulation has been more and more applied in the analysis of large power grids. By using electromagnetic transient modeling for DC transmission and its surrounding areas, and electromechanical transient modeling for other AC power grids, more detailed simulations can be achieved. The optimized power grid simulation, taking into account...

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Problems solved by technology

[0003] The DC electromagnetic transient model contains a large number of power electronic switches and nonlinear control elements. The operating point is always in the non-fundamental transient process and it is difficult to initialize based on the fundamental wave power flow. The establishment of mixed simulation data including multiple DC electromagnetic transient models, There are difficulties in mode adjustment and smooth start, which restrict the work efficiency and simulation accuracy of large power grid analysis

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