Telecommunications power architectures: distributed or centralized

Abstract

Various plausible power architectures used in COS and EEEs are discussed in this paper. Each architecture, including currently used architectures. has its advantages and disadvantages. S i n a architectures are application-spedc, it is emphvized that none or the architectures discussed is considered to be optimum. However, distributed architectures have several advantages over the bulk arclutectures used today. IMPACT ON POWERexpected to decrease. However, many more services are expected to be inccrporated in future networks. The net result of this will be an overall increase in the amount of power required to support the network. As the network architecture is expected to be distributed, the network will have remote modules possibly containing multiple microprocessors and memory in scattered through out the network. In addition. these modules may be placed in locations such as the tops of poles and mountains, underground. the curbside, etc.For such applications high power densities coupled with high efficiencies and high reliability under all environment and load conditions will be essential. POWER SYSTEMS ARCHITECTURESThe power needs of future networks will create demands that cannot be met with current power architectures; therefore, the present power architecture should be re-examined. The major factors influencing the choice of power architectures are as follows:Voltage and energy requirements of the load. Higher levels of integration and the implementation of sub-micron technology integrated circuits within the telecommunication load demand a low-voltage, high-quality power system to be reliably supplied to the load.b. The downtime requirements of the load and the attendant downtime requirements of the power c. The overall life of the power system d. The overall efficiency of the power system and the elimination of multiple conversions (ac-to-dc at some voltage level and then again to dc at anothcr level).gracefully.a.supply.e. The flexibility of the power system to grow ne power for the network wa vary according to the type of service and architecture adooted to imolement it. It must be noted that with f. The utility ratio (the ampacity of the power Plant that is in actual U% over the installed ampacity) of the power plant.

DC Microgrids—Part II: A Review of Power Architectures, Applications, and Standardization Issues

“…While it should be acknowledged that the considered list is by no means complete, we have limited our discussion only to these novel applications of DC MGs. More details about some well-known and matured examples such as DPSs [1]- [10], telecommunication [11]- [13], data centers [14], [15] vehicular electric power systems [16], [17] can be found in the existing literature.…”

“…roliferation of renewable energy sources (RESs), together with ever more electronic loads and electric vehicles (EVs) in modern power networks have prompted an idea of considering the application of low voltage DC distribution to areas far beyond traditional DC distributed power systems (DPSs) [1]- [10], or power supplies for telecom stations [11]- [13], data centers [14], [15] and vehicular Tomislav Dragičević, Juan C. Vasquez, and Josep M. Guerrero are with Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark (email: tdr@et.aau.dk , juq@et.aau.dk, joz@et.aau.dk).…”

Amplitude Death Solutions for Stabilization of DC Microgrids With Instantaneous Constant-Power Loads

“…Conclusions made modeling the ideal case of an LRC are usually valid because the efficiencies of most LRCs are usually above 96% within their nominal operating conditions [24]. Thus, (2) becomes with i L ≥ 0, and v c > .…”

A Generalized Fault Coverage Model for Linear Time-Invariant Systems

“…We apply the proposed fault coverage model to analyze the reliability of the DC network displayed in Fig. 7, which is an abstraction of a distributed DC power system for telecommunications applications [35]. The purpose of this system is to reliably provide power to two loads, represented by resistors , and , maintaining their voltage within some tolerance around some nominal values , and respectively.…”