104,002 research outputs found
Reactive power, imbalance and harmonics compensation using d-statcom with a dissipativity-based controller
No full textAdaptive Controller For D-Statcom in the Stationary Reference Frame to Compensate for Reactive and Harmonic Distortion Under Unbalanced Conditions
No full textA controller (130) for compensating reactive power and selected current load harmonics in an unbalanced multi-phase power distribution system. Control current is injected from a multi-phase voltage source inverter (118) into the multi-phase power distribution system as a function of the voltage and current provided by the source inverter 118. The injected current is operative to balance the load seen by the power distribution system including non-linear/distorted and unbalanced loads in each phase. The controller includes an inner loop control processor (216), an outer loop control processor, and an adaptation processor. The adaptation processor (238) is operative to estimate a selected set of predetermined harmonic components in the periodic disturbance which is a function of the unknown system parameters, the source current, the source voltage, and their time derivatives in stationary coordinates
An Adaptive Controller in the stationary reference frame for D-Statcom in unbalanced operation
No full textThis paper presents a passivity-based controller for a Distribution Static synchronous Compensator (D-Statcom) aimed at compensating reactive power and unbalanced harmonics in the general case of distorted and unbalanced source voltages and load currents. The proposed approach is based on the measurements of line currents, and ensures precise compensation for selected harmonics. Moreover, in order to compensate for the unavoidable uncertainty in certain system parameters, adaptation is added to the passivity-based controller. One of the major advantages of the proposed solution compared to conventional alternatives is that we are able to perform precise tracking (including higher order harmonics) even in the presence of a relatively low switching frequency, i.e., in the presence of an inverter with limited bandwidth. Simulation and experimental results are provided to illustrate the merits of our solution
An Adaptive Controller in the stationary reference frame for D-Statcom in unbalanced operation
No full textReactive Power and Unbalanced Compensation using STATCOM with Dissipativity-based Control
No full textPassivity-based controller for harmonic compensation in distribution lines with nonlinear loads
No full textA Robust Controller for Controlling a UPS in Unbalanced Operation
No full textA controller (236) for an uninterruptible power supply (UPS) compensates for harmonic distortion in the output current (224,26,228). The controller also provides a control vector (230) also with input from the adaptation processor (234)
Reactive power and unbalance compensation using STATCOM with dissipativity-based control
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