ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
A systematic method for deriving soft-switching three-port converters (TPCs), which can interface multiple energy, is proposed in this paper. Novel full-bridge (FB) TPCs featuring single-stage power conversion, reduced conduction loss and low voltage stress are derived. Two non-isolated bidirectional power ports and one isolated unidirectional load port are provided by integrating an interleaved bidirectional Buck/Boost converter and a bridgeless Boost rectifier via a high frequency transformer. The switching bridges on the primary side are shared, hence the number of active switches is reduced. Primary-side pulse width modulation and secondary-side phase shift control strategy are employed to provide two control freedoms. Voltage and power regulations over two of the three power ports are achieved. Furthermore, the current/voltage ripples on the primary-side power ports are reduced due to the interleaving operation. Zero-voltage-switching and zero-current-switching are realized for the active switches and diodes, respectively. A typical FB-TPC with voltage-doubler rectifier developed by the proposed method is analyzed in detail. Operation principles, control strategy and characteristics of the FB-TPC are presented. Experiments have been carried out to demonstrate the feasibility and effectiveness of the proposed topology derivation method.
I. INTRODUCTION
STORAGE battery capable of long-term energy buffering has been a critical element in renewable power systems due to the intermittent nature of sustainable energy [1][2]. Renewable energy power systems need to interface several energy sources such as photovoltaic (PV) array, fuel cells with the load along with a battery backup. A three-port converter (TPC) finds applications in such systems, because it has multiple interfacing ports and can accommodate a primary source and a storage and combines their advantages by utilizing a single power stage[3][4]. In comparison with using multiple traditional two-port converters, the most attractive features of using a TPC are reduced power conversion stages and reduced component count. Hence the efficiency and power density are improved and the cost is reduced[5]. Due to its advantages, the TPC is continuously evolving and new topologies and innovations have been continuously emerging [5]-[23].
VI. CONCLUSION
In this paper, a systematic method for synthesizing three-port converters (TPCs) from interleaved bidirectional converter and bridgeless Boost rectifiers has been proposed. The bidirectional converter and the bridgeless Boost rectifier are connected by a high-frequency transformer to interface multiple bidirectional sources and isolated output load simultaneously. Single-stage power conversion is realized to improve conversion efficiency of the power system. Voltage and power regulations over two of the three power ports are achieved by using interleaved pulse width modulation on primary-side switching-bridges and phase-shift modulation on secondary-side switches. Furthermore, soft-switching operation of all of the active-switches and diodes has been achieved. The voltage/current ripples are reduced thanks to the excellent performance of the proposed TPC topologies and modulation strategies. The voltage stresses of the devices are reduced because the voltages of devices are naturally clamped by the input and output voltages. These features make the proposed topologies good candidates for renewable power systems. A typical full-bridge TPC developed by the proposed method is analyzed with circuit operation principles, control strategies and characteristics presented. Experimental results of a 800W prototype have verified the feasibility and effectiveness of the proposed topology derivation method and the advantages of the derived TPC topologies.