Method, system and device for detecting steady-state operating range of flexible direct current transmission system, and storage medium

Abstract

The invention discloses a method for detecting steady-state operating range of a flexible direct current transmission system. The method for detecting steady-state operating range of the flexible direct current transmission system comprises the following steps: configuring a voltage sequence of the connecting grid changing side voltage of the flexible direct current transmission system; predetermining a steady-state operating range calculation equation of the flexible direct current transmission system, and the constraint condition of the steady-state operating range calculation equation includes at least the constraint on the overload capacity of the flexible direct current transmission system and the constraint on the voltage endurance capability of the primary device; and performing steady-state operating range detection on the flexible direct current transmission system under various voltage levels of the voltage sequence. Applying the scheme disclosed by the application, the steady-state operating range of the flexible direct current transmission system which is more in line with the actual project can be determined; evaluations which are more accurate and have more practicalapplication values can be made for the active and reactive power output capability of the flexible direct current transmission system; and the full application of the overload capacity is facilitated.The application also discloses a system and device for detecting the steady-state operating range of the flexible direct current transmission system and a storage medium, which have corresponding effects.

Description

technical field [0001] The invention relates to the technical field of flexible straight system detection, in particular to a method, system, equipment and storage medium for detecting a steady state operating range of a flexible straight system. Background technique [0002] The flexible DC transmission technology is the third-generation DC transmission technology based on the voltage source converter technology. Gate Bipolar Transistor, insulated gate bipolar transistor). Its development can be divided into two-level / three-level voltage source converters based on pulse width modulation theory and MMC (Modular Multilevel Converter) based on staircase wave approximation. At this stage, MMC is the main one. Development trend, the flexible DC systems of this application are all MMCs. [0003] The control method of the flexible DC link variable tap can be divided into two categories: manual and automatic. The commonly used mode is automatic control, which can be divided into ...

AI Technical Summary

Problems solved by technology

[0010] However, the aforementioned analysis only theoretically obtains the output range of flexible DC active power and reactive power after the tap is fixed, and only stays at the level of theoretical analysis without the support of simulation or actual operating data.

This is because in practical applications, flexible DC systems usually have overload logic. In addition, even if the overcurrent capability of IBGT is weaker than that of thyristors, there will be a certain margin of flow capacity and short-term overcurrent capability in engineering design.

It can be seen that because the traditional scheme does not consider the overload logic, it is not conducive to accurately determine the steady-state operating range of the flexible straight system, and it is not conducive to fully utilizing the overload capacity

Images