Method for statically analyzing voltage stabilization of VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system

An AC/DC system, static analysis technology, applied in AC network circuits, DC network circuit devices, electrical components, etc., can solve problems such as commutation failure failures
CN101976836AInactive Publication Date: 2011-02-16HOHAI UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2011-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for statically analyzing voltage stabilization of a VSC-HVDC (Voltage-Sourced Converter-High Voltage Director Current) containing AC and DC system. Aiming at the problem of voltage stability, through determining a tide equation and a converter equation of the VSC-HVDC AC and DC system and considering the change of a load and a generator output, a tide equation containing parameters is formed and a static model of the VSC-HVDC AC and DC hybrid system is established; and the static model is analyzed by adopting a continuous tide method based on a uniform iteration method, and the influence of a VSC-HVDC element on the voltage stability of the system is researched. The invention lays a foundation for further researching the voltage stability characteristic ofthe VSC-HVDC AC and DC hybrid system.
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Description

technical field

[0001] The invention relates to a static analysis method for voltage stability of an AC-DC hybrid system including a voltage source converter type high voltage direct current transmission (VSC-HVDC), belonging to the technical field of power system operation and control. Background technique

[0002] At present, my country's power system has entered the stage of transition from regional power grids to national interconnected power grids. High-voltage direct current transmission (HVDC) has obvious advantages in ultra-long-distance power transmission and system interconnection. my country's Southern Power Grid and East China Power Grid have formed an AC-DC hybrid transmission network. The AC-DC hybrid system has a larger transmission capacity and a more flexible operation mode. The introduction of multiple DC tie lines improves the controllability of the entire system, but it also brings some special problems, making the AC-DC hybrid system safe. The stability...

Claims

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