Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

Abstract

Abstract-This work reviews the state-of-the-art in the field of harmonic resonance problems in Wind Power Plants (WPPs). Firstly, a generic WPP is modeled according to the equivalent circuits of its passive and active components. Main focus is put on modeling active components, i.e. the ones based on power converters. Subsequently, pros and cons of frequency and time domain analysis methods are outlined. The next sections are devoted to mitigation methods implemented in the power electronics converters. From the wind turbine perspective, different techniques to enhance the robustness of the controller are analyzed. Subsequently, the suitability for active damping of harmonics using STATCOM devices is assessed, with focus both on control techniques and power converter technologies.

Harmonic Resonance Stability of Aeronautical Ground Lighting Systems

“…CCRs may cause instabilities when their control interacts with poorly damping resonances in the 0.75  2 kHz range. These harmonic resonance instabilities are reported in other gridconnected VSCs such as HVDC links [8], [9], wind power plants [10], ac traction systems [11] and single-phase applications [12], [13]. In AGL systems, the resistance value of halogen lamps may be enough to prevent these instabilities but they could arise with LED lamps due to their low power consumption.…”

“…Considering the CCR and AGL circuit approximated expressions in (10) and (18), the harmonic frequency of the parallel resonance condition in  frame is obtained as…”

Positive-Net-Damping Stability Criterion in Grid-Connected VSC Systems

“…Thus, this parallel resonance is a particular case of the stability condition |M(jω )N(jω )| = 1. The parallel resonance can also be obtained from the parallel equivalent impedance Z t (jω) (7). Most resonance studies in grid-connected VSC systems consider VSC as an ideal current source and impose B g (ω ) = 0 to characterize parallel resonance [3].…”

“…Data of the VSC control and the WPP are shown in Table I and Table III, respectively. Instability problems can arise due to the interaction between the grid side VSC control of WTs and the WPP [7]. In order to analyze these problems, the WT VSC and the control are modeled as a Norton equivalent circuit (5) and the offshore WPP is modeled with the equivalent circuit in Fig.…”

“…(ii) Near-synchronous resonance instabilities which approximately range from 50 to 300 Hz and are caused by negative dampings due to current control dynamics and outer controls. The harmonic resonance instabilities are reported in different grid-connected VSC applications such as single-phase ac traction systems [6] and WPPs [7]. Also, a L. Sainz and O. Gomis-Bellmunt are with the Dep.…”