Emergency power support coordination optimization method and device for multi-circuit DC lines

Abstract

The invention discloses an emergency power support coordination optimization method and device for multi-circuit DC lines. The method comprises the following steps: establishing an emergency power support coordination optimization model of the multi-circuit direct current line; obtaining emergency power support parameters of DC transmission lines by particle swarm optimization; according to the emergency power support coordination optimization model and the emergency power support parameters, obtaining the emergency power support strategy to provide power support according to the emergency power support strategy in the event of AC grid failure. The method calculates the optimal emergency control strategy according to different fault conditions, and provides power support when the fault occurs, so that the power support can be provided when the AC power network fails, the tie line power and system frequency can be quickly stabilized, and the stable operation level of the power network can be improved.

Description

technical field [0001] The invention relates to the technical field of power system automation, in particular to a multi-circuit DC line emergency power support coordination optimization method and device. Background technique [0002] Due to its advantages in large capacity and long distance, DC transmission system has developed rapidly in recent years. With the continuous expansion of the power grid scale and the continuous improvement of DC technology, more and more DC lines have been built and put into operation, and the structural characteristics of the power grid have become more complex and diverse. At the same time, it has also brought new problems to the safe and stable operation of the power grid system. . The direct current transmission line can quickly adjust the active power and reactive power, and the potential of using this feature for emergency support of direct current power is huge. By giving full play to its fast adjustment characteristics, it can realiz...

AI Technical Summary

Problems solved by technology

[0004] However, the DC power support in the actual system is limited by various factors, such as the overload capacity of the converter valve, the working state of the cooling system, the reactive power compensation capacity of the sending and receiving end, and the strength of the power grid, etc.

At present, there are many studies on DC emergency power support at home and abroad, but most of the existing studies focus on the analysis of the influencing factors of emergency power support, and most of them are qualitative analysis

There is no systematic analysis method for the parameter setting of DC line emergency power support, and there is no in-depth development of the coordination and cooperation of emergency power support for multiple DC lines

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