subsynchronous

subsynchronous

[¦səb′siŋ·krə·nəs]
(electricity)
Operating at a frequency or speed that is related to a submultiple of the source frequency.
References in periodicals archive ?
For the short-shunt configuration, the authors of [27] concluded that adding series capacitors ensures a successful IM starting and highlighted the presence of the subsynchronous resonance phenomenon due to large variations in the total load impedance for such a topology.
As they are being pushed to these new extremes of operation the designs must also adapt to accommodate the consequences of these extremes including increased rotor flexibility and an increased likelihood of subsynchronous whirl.
Figures 6 and 7 show the capabilities of the NPI controller to improve system damping, MPPT, LVRT, and its contribution to network support at both subsynchronous and supper synchronous conditions.
This device is considered as one of the most effective FACTS and is widely used to regulate the power flow in transmission lines, dampen the power oscillations, mitigate subsynchronous resonance (SSR), enhance power system stability, and so forth by changing the reactance of transmission line [16].
Babu, "Mitigation of subsynchronous resonance with fractional-order PI based UPFC controller," Mechanical Systems and Signal Processing, vol.
Moiola, "Multiparameter bifurcation analysis of subsynchronous interactions in DFIG-based wind farms," Electric Power Systems Research, vol.
(i) Subsynchronous mode or partial load mode at below rated speeds: the stator of the DFIG supplies power to the grid and slip power to the rotor via the converters and slip rings.
Between 1966 and 1968, we launched twenty-seven DSCS I satellites--as many as eight at a time--into a subsynchronous orbit.
Edris, "Hybrid series compensation scheme capable of damping subsynchronous resonance", IET Generation, Transmission & Distribution, vol.
Yu, "Removal of dc offset and subsynchronous resonance in current signals for series compensated transmission lines using a novel Fourier filter algorithm," Electric Power Systems Research, vol.