Method for improving simulation capacity of HVDC transmission system

• Main Authors: ZUO JIANG, AI XIN, HONG SHANNING, LIU CHONGRU
• Format: Patent
• Language: Chinese; English
• Published: 04.11.2009
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; GENERATION; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a method for improving simulation capacity of HVDC transmission system in the technical field of electric power system operation and control technique. The technical program includes: singlet dynamic phasor is expanded to polymorphic dynamic phasor; switch function is used for indicating the characteristic of a converter valve, polymorphic dynamic phasor model of HVDC system is built considering the non-ideal state that alternating current fundamental voltage is asymmetric and direct current is mixed with ripples; curves indicating that each variable changes with time are obtained according to algebraic differentiation equations of the model; complete curves indicating that direct voltage at rectification side of the HVDC transmission system, direct voltage at contravariance side, direct line current and current at alternating current side change with time are calculated respectively by inverse Fourier transform; and finally values at the alternating current side and the direct current