TITLE:
Research on the Voltage Interaction of Multi-Infeed HVDC System and Interaction Factor
AUTHORS:
Shengjun Zhou, Guangyao Qiao, Chuan He, Wenhui Wang, Tianqi Liu
KEYWORDS:
Multi-Infeed HVDC, Inverter Bus Voltage, Voltage Interaction, Interaction Factor, Equivalent Impedance, Coupling Impedance
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.3 No.4,
April
13,
2015
ABSTRACT: In multi-infeed HVDC system, the
interactions and influences between DC systems AC systems are complex as the electrical
distances among DC converter stations which are relatively short. Multi-infeed
interaction factor (MIIF) can effectively reflect the interaction among DC
systems. The paper theoretically analyzes the impact factors of MIIF like the electrical
distances between two DC converter stations and the equivalent impedance of the
receiving end AC system. By applying the Kirchhoff’s current law on the
inverter AC bus, the paper deduces the analytical expressions for MIIF. From
the expression, it is clear how the equivalent impedance of AC system and coupling
impedance can affect MIIF. PSCAD simulations validate the effectiveness and the
correctness of the proposed expression and some useful conclusions are drawn.