Nonlinear Control of Back-to-Back VSC-HVDC System via Command-Filter Backstepping

Figure 5

System response results of command-filtered backstepping control compared with PID control and controller.

(a) DC-link voltage

(b) Real power components of AC system 1

(c) Reactive power components of AC system 1

(d) Real power components of AC system 2

(e) Reactive power components of AC system 2