Active Damping of LCL Filter for Three-phase PWM Inverter without Additional Hardware Sensors

A Novel Active Damping Control of a Three-phase PWM Inverter with LC Filter

A novel control method of a three-phase PWM inverter with LC filter is proposed. The transfer function of LC filter is the same as that of 2nd order low pass filter(2nd LPF) which has a zero damping ratio. A simple method of implementing 2nd LPF with damping ratio is to add resistor to inductor or capacitor of LC filter. In an industrial application, it is not practical to adopt damping resisto...

Hardware Implementation for Multicarrier Pwm Based Three Phase Multilevel Inverter

Three-phase LCL-filter for Grid-connected Inverter Using Cooperative Bacteria Foraging Optimization

This paper establishes an LCL-filters design and control for three-phase grid inverter. The crucial object is to conquer optimum damping with a required system control bandwidth for the LCL-filter. This control technique is achieved by using Bacteria Foraging Optimization. Mathematical analysis has been introduced to investigate the steady-state and dynamic performances of the overall system. T...

Grid Current Regulation of a Three-Phase Voltage Source Inverter With an LCL Input Filter

Many grid connected power electronic systems, such as STATCOMs, UPFCs, and distributed generation system interfaces, use a voltage source inverter (VSI) connected to the supply network through a filter. This filter, typically a series inductance, acts to reduce the switching harmonics entering the distribution network. An alternative filter is a LCL network, which can achieve reduced levels of ...

Explicit Model-Predictive Control of a PWM Inverter With an LCL Filter

This paper deals with the control of pulsewidth modulation inverters connected to the grid through resonant LCL filters. It proposes two alternative (piecewise affine) models that account for the switched behavior of the converter. Based on these improved models, an explicit model-predictive control scheme is derived in order to provide a fast response, making it very suitable for applications,...