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A Hybrid Modular Multilevel Converter (H-MMC) for grid-connected Photo-Voltaic (PV) system is presented in this paper. The array of PV-panels is connected in each sub-module of the converter. The sub-modules are connected in series to form the dc-link for each phase. The dc-link voltage is unipolar and multilevel in nature which is converted to ac voltage by a low frequency converter (LFC). This topology...
A dual inverter based solar PV system is presented in this paper. To reduce the switching loss, the main inverter is switched at low frequency (square wave mode) while the other inverter operates at a higher frequency to compensate for the harmonics generated by the low frequency inverter. A new maximum power point tracking (MPPT) algorithm is proposed using only AC-side current and voltage signals...
In this paper, a fast and simple time domain technique is developed to generate the current reference for a Shunt Active Power Filter (APF) to compensate harmonics, reactive power and load unbalance. Using the proposed technique, the control logic is developed for a Shunt APF topology where a 2-level VSI Inverter is employed. MATLAB / Simulink - based simulations are performed to verify the effectiveness...
Performance of a static synchronous compensator (STATCOM) is presented in this paper. A low frequency and a high frequency inverter are used for this purpose. The low frequency inverter operates in square wave mode in the limiting case, when the STATCOM operates like a static VAR compensator (SVC). Minimum numbers of switchings per cycle in the square wave inverter (SWI) make the switching losses...
This paper deals with a unique combination of two inverters those may work as an active power filter (APF) or a STATCOM. Two inverters are switched at different frequencies. The low frequency inverter takes care of the reactive power demand of the system and makes the source current in phase with the voltage, while, the high frequency inverter mostly compensates for the harmonics. In the limiting...
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