Multilevel Static Compensators (StatComs) offer significant advantages over traditional two level converter based StatComs. The cascaded H-bridge topology for multilevel StatComs is increasing becoming the topology of choice. This paper will address the problem of compensating for the non-ideal nature of the H-bridges so that accurate current control can be… (More)
Model Predictive Control (MPC) can provide performance benefits over traditional schemes in power electronic converter control. A key variable in predictive control schemes is the prediction horizon. This paper examines the impact of increasing the prediction horizon of a five level StatCom via simulation and experimental results.
Multilevel Cascaded H-Bridge (CHB) converters have attractive features for the implementation of large scale photovoltaic systems. They can be directly connected to high voltages and the multilevel voltage synthesis reduces the harmonic distortion introduced. In addition, they have individual DC links ideal for connecting photovoltaic arrays. Existing high… (More)
Phase shifted carrier modulation enforces harmonic cancellation through each phase-leg in a multi-level H-bridge StatCom (H-StatCom). The implementation of this scheme, while achieving excellent harmonic performance suffers from control interactions between the voltage balancing loops. This paper first analyses these interactions and then develops a phase… (More)
A novel droop controller is developed employing parallel voltage and current control algorithms. P-F droop is performed by a voltage controller in the direct axis of the rotating reference frame, whilst Q-V droop is achieved via a deadbeat current controller in the quadrature axis. Simulation and hardware results are presented to demonstrate the control… (More)