A Novel Dual-Winding BLDC Generator–Buck Converter Combination for Enhancement of the Harvested Energy From a Flywheel

A comprehensive state‐of‐the‐art review of power conditioning systems for energy storage systems: Topology and control applications in power systems

“…The boost converter consisting of the 3‐state commutation cell is designed to achieve HV gain to charge the BESS using PV panels while decreasing the number of conversion stages, as the PV panels and the BESS share the same converter [26]. To avoid the shortcomings of the boost converter in the generating mode, a combination of a BDDC and a buck‐type DC/DC converter is devised for the dual winding‐brushless DC (BLDC) machine‐based FESS [27]. The conventional buck/boost converters are unsuitable for high step‐up/step down applications due to their hard‐switching, extreme duty cycle, limited voltage conversion ratio and severe reverse recovery problem [28].…”

“…The FESS, SC and SMESS have a short‐term energy storage capability (ms to mins), whereas the BESS has a medium‐to‐long‐term energy storage capability (mins to h) [15–17]. This section categorises the popular topologies of the DC/DC, DC/AC and AC/AC converters into DC bus PCS [20–54] and AC bus PCS [55–72] based on the output voltage types at the connected point, as shown in Figure 2. The DC bus PCS ensures the bidirectional transfer of the electrical energy between the ESS source and DC bus.…”

“…With the improvements in the power semi‐conductor switches with a wide band gap (WBG), many topologies of the PCS are now available with reduced total harmonic distortion (THD), smooth output voltage and high efficiency. The configurations of the PCS in ESSs are generally divided into two types based on the output voltage at the connected points: DC bus PCS [20–54] and AC bus PCS [55–72]. First, the former PCS ensures a stable DC bus voltage regulation for the DC‐link or DC grid by charging and discharging the ESS, which uses a DC/DC converter or an AC/DC converter.…”

“…This paper provides critical insights by filling the gap about the advancements of the power converter topologies and their control techniques in the PCS employed for BESS, FESS, SC/UC and SMESS in the power system applications. Generally, the PCS of ESSs consists of a combination of power converters, that is, DC/DC, DC/AC, AC/DC and AC/AC converters [20–72]. With the improvements in the power semi‐conductor switches with a wide band gap (WBG), many topologies of the PCS are now available with reduced total harmonic distortion (THD), smooth output voltage and high efficiency.…”

Research on an Integrated Hydrostatic-Driven Electric Generator with Controllable Load for Renewable Energy Applications

“…Therefore, controllable power electronics are often employed to connect the generator terminals to electrical loads, batteries or grids. In the experimental platform, the generated energy is converted and supplied to batteries or direct current (DC) electrical loads with relatively low voltage through a diode rectifier and a buck converter [35,36]. Then the captured energy and the system pressure can be governed by the pulse width modulation (PWM) control signals input to the converter.…”