A Nonlinear Controller for Neutral Point Piloted (T-Type) Multilevel Inverter-Based Three-Phase Four-Wire DSTATCOM

<div>Harmonic spectra of load currents and compensated source currents with PI controller. (a) Phase <i>a</i> load current harmonic spectrum. (b) Phase <i>b</i> load current harmonic spectrum. (c) Phase <i>c</i> load current harmonic spectrum. (d) Phase <i>a</i> source current harmonic spectrum with PI controller. (e) Phase <i>b</i> source current harmonic spectrum with the PI controller. (f) Phase <i>c</i> source current harmonic spectrum with the PI controller.</div>

International Transactions on Electrical Energy Systems

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Figure 8

Figure 8: A Nonlinear Controller for Neutral Point Piloted (T-Type) Multilevel Inverter-Based Three-Phase Four-Wire DSTATCOM 