Abstract
This study aims to implement a single-stage differential boost inverter (SSDBI) applied in a single-stage battery energy storage system (BESS) topology that can supply power from a lower-voltage battery module to an alternating current (AC) load. Compared with the common two-stage topology, which has a two-stage converter and higher-voltage battery module array, the single-stage topology can reduce the number of cells and components and improve the power density. In addition, a modified sinusoidal pulse-width modulation (SPWM) control was proposed to reduce the control complexity of the SSDBI while improving the total harmonic distortion (THD) of the inverter. The modified SPWM control can reduce the duty ratio of the SSDBI and the stress on the components in order to improve the AC voltage output waveform and reduce the THD.
Highlights
Nowadays, the technology of inverters has been increasingly developed because they are widely used in numerous applications, such as in PV and power grids
The other system specifiand the voltage range of the battery module was 33.6–58.4 cations can be obtained in Table 2, for which the inductors and the capacitors were measured with an LCR meter (WK3255B)
The results show that the traditional sinusoidal pulse-width modulation (SPWM) control needs a larger peak value of both the voltage and current than the modified control while reaching the same root mean square (RMS)
Summary
The technology of inverters has been increasingly developed because they are widely used in numerous applications, such as in PV and power grids. The inverter plays an important role in a BESS, where the inverter is responsible for the energy transmission. The AC source (utility power) can Received: 2 August 2021 charge the battery pack through the battery charger.
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