بررسی رزنانس زیرسنکرون در خطوط انتقال HVDC مبتنی بر VSC



Investigation of Subsynchronous Resonance With VSC-Based HVDC Transmission Systems Abstract—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


Investigation of Subsynchronous Resonance With VSC-Based HVDC Transmission Systems


Abstract—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 􀀀-
model, the transient simulation considers the 􀀀- 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..

بررسی رزنانس زیرسنکرون در خطوط انتقال HVDC مبتنی بر VSC
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Damping torque eigenvalue analysis HVDC


parameter optimization transient simulation voltagesource


converters (VSCs)


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