Novel correction control approach for an AC/DC hybrid network considering the PQ decoupling property

Abstract

With the maturity and wide application of the voltage-source converter-based high-voltage direct current (VSC-HVDC) technology in the power grid, the fast-response characteristic of VSC helps to improve the speed of corrective control for the AC/DC hybrid system. This paper presents a corrective control model for AC/DC hybrid grids based on VSC-HVDC. The model is expressed as a typical optimisation model with both the features of the equipment and security constraints of a power network. The corrective control model is dived into an active power sub-model and a reactive power sub-model in order to improve the calculation speed. Case studies of a modified IEEE testing system have been carried out. The results demonstrate the effectiveness of the approach.

Keywords

• power system security
• HVDC power transmission
• power transmission control
• load flow control
• power grids
• HVDC power convertors
• power system simulation
• hybrid power systems
• AC-DC power convertors
• voltage-source convertors
• optimisation
• reactive power control
• VSC-HVDC technology
• VSC-based high-voltage direct current technology
• voltage-source converter-based HVDC technology
• correction control approach
• optimisation model
• reactive power sub-model
• active power sub-model
• power network
• AC/DC hybrid grids
• corrective control model
• AC/DC hybrid system
• power grid
• PQ decoupling property
• AC/DC hybrid network