Quantitative Analysis on Relationship between VDCOL Controller Parameters and Voltage Stability Factor in Multi-infeed DC Transmission System

Abstract

Based on the incremental power flow equation, the influence of VDCOL controller parameters on voltage stability factor VSF was studied by sensitivity analysis method, and the mathematical relationship between the two was obtained for the first time. Based on the analytical relationship, the quantitative relationship between VDCOL control parameters and voltage stability factor VSF was made clear, which lays a mathematical and theoretical foundation for the controller parameters tuning. Taking CIGRE standard DC system parameters as typical parameters, the relation curve between VDCOL control parameters and VSF was obtained. Combined with the relation curve, the influence of VDCOL parameters on the system voltage stability was further expounded, and some useful conclusions were obtained. The simulation analysis shows that the method and conclusions obtained in this paper are correct and effective, and have important theoretical guidance and practical significance on the design and operation of the system.