Abstract
The rapid growth of the Information and Communications Technology (ICT) sector requires additional infrastructure, such as more micro-datacenters and telecom stations, to support the higher internet speeds and low latency requirements of 5G networks. The increased power requirements of the new ICT technologies necessitate the proposal of new power supplies, in an attempt to support the increase in energy demand and running costs. This work provides an in-depth theoretical analysis on the losses of the individual stages of commercially available PSU and proposes a new multicell PSU, the buck PFC converter, which offers a higher overall efficiency at varying load levels. The theoretical results are verified using simulation results, via a PSIM Thermal Module, and using experimental data. The results indicate that multicell structures can improve the overall PSU efficiency by 1.2% at 50% rated power and more than 2.1% at full power. Finally, taking into consideration the economic implications of this study, it is shown that the proposed multicell structure may increase the PSU costs by 10.78%, but the payback period is in the order of just 3.3 years.
Highlights
The 5G network requirements for the Information and Communication Technology (ICT) sector has caused a continuous demand for growth in micro-datacenter and Telecommunication Stations (TS) [1,2]
The impact of power supply units (PSU) with improved energy efficiency could lead to significant energy savings in the Information and Communications Technology (ICT) industry globally, and could contribute to the efforts and targets set for global energy decrease, through more efficient systems
The results presented in this study demonstrate that using low-power modules such as the multicell structure for high-power PSU systems improves the energy efficiency
Summary
The 5G network requirements for the Information and Communication Technology (ICT) sector has caused a continuous demand for growth in micro-datacenter and Telecommunication Stations (TS) [1,2]. A micro-datacenter (μDC) is a datacenter of size smaller or equal to one rack. The growth of datacenters and micro-datacenters is huge nowadays and they have a great impact on global electricity consumption. In 2016, more than 1.8% of the global electrical energy was consumed by datacenters and this will keep increasing [3]. 5G networks have increased energy requirements compared to previous generations, and several researchers have concentrated on improving the energy efficiency of communication links [4,5,6]. The increased number of TS and μDC will unavoidably lead to an increased energy consumption
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