Analysis of current controllers for voltage-source inverter

A new hysteresis band current control technique for a shunt active filter

“…In the conventional HB current control technique, maximum switching frequency occurs near the zerocrossing region [7][8][9]. Additionally, in the zero-crossing region shown in Figure 1, the inverter output current flows through a transistor, and then, by changing the direction, it flows through a free-wheeling diode of the same transistor during a switching period, or vice versa.…”

“…For the application of the active filter, the hysteresis band (HB) current control technique is the most preferred solution because of advantages such as easy implementation and a very fast dynamic response [5][6][7][8][9][10][11][12][13].…”

Efficiency and Power Density Improvement of Grid-Connected Hybrid Renewable Energy Systems utilizing High Frequency-Based Power Converters

“…Moreover, the power converter system can perform reactive power compensation and smooth grid connection. However, the DFIG system has the following disadvantages: a multi-stage gearbox is still necessary in the drive train because the speed range is far from a common turbine speed of [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] rpm, slip ring is used to transfer the rotor power by means of a partial-scale converter which requires a regular maintenance, large stator currents due to grid fault condition result in large rotor currents then converter needs to be protected from destroy, control strategies are complicated [37].…”

“…Several HFAC power distribution systems were implemented for aerospace applications, and NASA evaluated this scheme for space station applications [9,10]. It was developed as a workable power distribution system for hybrid electric vehicles (HEVs) as well [11] using traditional AC-AC conversion through semiconductor switches.…”

“…For example, a VS inverter might be a buck converter that cannot produce an output voltage greater than the source voltage. This limitation often requires an additional DC-DC boost converter for stationary applications such as batteries, photovoltaics, and fuel cells, which make the power conversion have lower efficiency, larger size, and higher cost [7][8][9][10][11].…”