Directional derivative-based method for quasi-stationary voltage support analysis of single-infeed VSC-HVDC units

• Published in: High voltage 2020-10, Vol.5 (5), p.511-522
• Main Authors: Perilla, Arcadio, Rueda Torres, Jose Luis, Rakhshani, Elyas, Irnawan, Roni, Faria da Silva, Filipe, van der Meijden, Mart, Bak, Claus Leth, Alefragkis, Alex, Lindefelt, Anna
• Format: Article
• Language: English
• Subjects: AC bus voltage; analytical method; directional derivative concept; HVDC power convertors; HVDC power transmission; power generation control; power generation faults; power system control; PWM power convertors; quasistationary voltage support analysis; reactive power control; reduced size power system; single-infeed vsc-hvdc units; Special Issue: Advances in High Voltage DCSystems/Grids Control, Operation, andProtection; voltage source converter; VSC reactive power control modes; VSC units; VSC‐HVDC systems
• ISSN: 2397-7264; 2397-7264
• DOI: 10.1049/hve.2019.0420

This study presents an investigation of the impact of the quasi-stationary voltage support provided by a voltage source converter (VSC) connected to a single point of a power system. Based on the directional derivative concept, an analytical method is developed to quantify the sensitivities of the AC bus voltage with respect to the VSC reactive power control modes. Based on a real case study, it is shown that the method applies to VSC units that are part of VSC-HVDC systems, which can operate in a point-to-point or multi-terminal configuration. Time-domain simulations are performed to verify the findings from the application of the analytical method on a reduced size power system.