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A New Definition of Short-circuit Ratio for Multi-converter HVDC Systems
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 Title & Authors
A New Definition of Short-circuit Ratio for Multi-converter HVDC Systems
Liu, Dengfeng; Shi, Dongyuan; Li, Yinhong;
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 Abstract
In this paper, a new definition of short-circuit ratio concept for multi-converter HVDC systems is proposed. Analysis results of voltage interaction between converters show that the reactive power-voltage characteristic of a converter has a dominant effect on voltage interaction level compared with its active power-voltage characteristic. Such a relation between converter reactive power and voltage interaction level supports taking the former into account in the definition of short-circuit ratio concept for multi-converter systems. The proposed definition is verified by the method of maximum power curve for various system configurations. Furthermore, a formula to calculate transient overvoltage for multi-converter systems is derived based on the proposed definition, and the efficiency of the derived formula is verified.
 Keywords
High voltage direct current;Multi-converter system;Short-circuit ratio;Multi infeed interaction factor;Converter reactive power-voltage characteristic;Transient overvoltage;
 Language
English
 Cited by
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