Investigation of Subsynchronous Resonance With VSC-Based HVDC Transmission Systems

• Published in: IEEE transactions on power delivery Vol. 24; no. 1; pp. 433 - 440
• Main Authors: Prabhu, N., Padiyar, K.R.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Analytical models; Applied sciences; Computer simulation; Converters; Damping; Damping torque; Direct current networks; eigenvalue analysis; Eigenvalues; Eigenvalues and eigenfunctions; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Electronics; Exact sciences and technology; Field study; Generators; HVDC; HVDC transmission; Investigations; Mathematical models; Other multijunction devices. Power transistors. Thyristors; parameter optimization; Power conversion; Power electronics, power supplies; Power networks and lines; Resonance; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Semiconductors; Simulation; Special rotating machines; Testing; Torque; Transient analysis; transient simulation; Turbogenerators; voltage-source converters (VSCs); HVDC power convertors; Current source converter; Power transmission; Operating mode; Voltage control; Field experiment; Gate turn off thyristor; Power transistor; Direct current; HVDC systems; Voltage mode; eigenvalue analysis; Inverter; Rectifier; Damping torque; Insulated gate bipolar transistor; On-line systems; Power electronics; voltage-source converters (VSCs); HVDC; Voltage source converter; Case study; Subsynchronous resonance; Power control; Turbine generator; parameter optimization; transient simulation; Comparative study
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/TPWRD.2008.2005878

The HVDC converter control can destabilize torsional modes of nearby turbogenerators. The first experience of HVDC-turbine generator torsional interaction was observed in 1977 during field tests at Square Butte. The development of power semiconductors, specially insulated-gate bipolar transistors and gate turnoff thyristors (GTOs) has led to the small power HVDC transmission based on voltage-source converters (VSCs). The self-commutated VSC-based HVDC installations have several advantages compared to conventional HVDC-based online-commutated current source converter. The main objective of this paper is to investigate and present the detailed analysis of subsynchronous resonance (SSR), arising from a VSC-based HVDC system connected close to generating units. The analysis considers different operating modes of the converters. Based on a case study, it is shown that the dc voltage control mode of VSC operation (rectifier/inverter) close to the generator units can contribute positive damping in the torsional-mode frequency range of interest. The investigations of SSR with VSC-based HVDC is carried out based on linear (damping torque and eigenvalue) analysis and nonlinear transient simulation. While the damping torque, eigenvalue analysis, and controller design are based on the D-Q model, the transient simulation considers the D-Q model and the three-phase detailed model of VSC using switching functions. The influence of the operating modes of the converters and effects of some important parameters, such as effective short circuit ratio and generator rating are investigated.