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Load margin evaluation method and system for AC-DC hybrid power system

An AC-DC hybrid, load margin technology, applied in the field of power grids, can solve problems such as complex voltage stability problems

Active Publication Date: 2020-07-03
TSINGHUA UNIV +1
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  • Claims
  • Application Information

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Problems solved by technology

At the same time, VSC-HVDC also makes the voltage stability problem more complicated, which brings great challenges to the safe and stable operation of the power system

Method used

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  • Load margin evaluation method and system for AC-DC hybrid power system
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  • Load margin evaluation method and system for AC-DC hybrid power system

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Embodiment Construction

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0051] Before the embodiment of the present invention, the relevant technical features used in the embodiment of the present invention are first described as follows:

[0052] Voltage Source Converter based High Voltage Direct Current Transmission (VSC-HVDC for short) technology, which is similar in structure to HVDC, consists of a converter stati...

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Abstract

The embodiment of the invention provides a load margin evaluation method and system for an AC-DC hybrid power system. The method comprises: establishing a load flow calculation model of the AC-DC hybrid power system containing VSC-HVDC; and in the load flow calculation model, optimizing VSC control parameters based on a particle swarm algorithm to calculate the load margin of the AC-DC hybrid system based on an optimal continuous load flow calculation method. The embodiment of the invention provides a load margin evaluation method and system for an AC-DC hybrid power system. A load flow calculation model of an AC-DC hybrid system is established, VSC control parameters are optimized according to a particle swarm algorithm, the optimal continuous power flow is introduced to perfect and solvethe constructed power flow model, so that the evaluation of the load margin of the AC / DC hybrid system is realized, and a specific way for optimizing the load margin of the AC / DC hybrid system is provided while the voltage stability and the load capacity of the AC / DC hybrid system are effectively evaluated.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power grids, and in particular to a load margin evaluation method and system for an AC / DC hybrid power system. Background technique [0002] With the continuous expansion of the grid scale, the continuous increase of the voltage level and the continuous increase of the transmission distance, the impact of the voltage stability problem on the power system is increasing. Since the 1870s, many major voltage accidents have occurred around the world, causing huge economic losses, so ensuring voltage stability is of great significance for the safe and stable operation of the power grid. The high-voltage DC system based on voltage source converter (VSC-HVDC) has independent and fast active and reactive power adjustment functions, can provide reactive power support for the grid voltage, and does not require the commutation voltage provided by the AC grid to connect weak grids and passive ne...

Claims

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Application Information

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IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 周健沈冰时珊珊郭强韩明远陈颖黄少伟高仕林
Owner TSINGHUA UNIV
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