Optimized predictive control of three-level neutral point clamped converter based statcom using space-vector modulation

Abstract EN

This paper presents the optimized predictive control of three-level neutral point clamped (NPC) converter based STATCOM intended for installation on renewable energy equipment, industrial and utility distribution systems.

The optimized predictive control method computes the optimal vector using the converter’s discrete-time model just once in every control cycle, while model predictive methods need 27 calculations.

The main feature of the designed optimized predictive control scheme is to maintain the dc-bus voltage at the required level and to compensate the desired reactive power of systems.

Meanwhile, the control technique operates with constant switching frequency, using space-vector modulation.

Also, the paper solves time delay problem in real implementation by considering the delay compensation in the predictive model.

As a result, the STATCOM operates with good performances in steady and transient states.

Finally, both simulation and experimental results are shown the effectiveness of the STATCOM, and verified the validity of the proposed optimized predictive control method.