Power supply aware computing

2014 IEEE 36th International Telecommunications Energy Conference (INTELEC)

Jatskevich

Cho

et al. 2014

It is envisioned that in future dc power distribution of telecom systems and data centers the smart loads will communicated with sources informing of the changes in operation. This paper presents a strategy based on a preenergized auxiliary power circuit to suppress fast transients from electronic loads. Since the transient-occurrence time will be informed by the load, the auxiliary circuit will pre-energize the dc bus and will inject additional current to counteract the change in load and in this way smooth the transient. In this paper, the design and operation principle of the proposed auxiliary circuit is explained. The proposed approach is verified in a dc microgrid model with 380 VDC and 24 VDC buses and is shown to be very effective in suppressing the load transients.

Section: A Basic Concept Of Load-informed Auxilary Circuitmentioning

confidence: 99%

Suppressing fast load transients and improving dynamic performance in DC telecom power systems and data centers

2014 IEEE 36th International Telecommunications Energy Conference (INTELEC)

Jatskevich

Cho

et al. 2014

“…The paradigm shift in power electronics that the communication between sources and loads will bring potential benefits on power managements is paving a path to optimization of DER systems feeding smart loads [11], [12]. It is envisioned that the future smart electronic loads will use active dampers to flexibly configure new systems and ensure the desired performance by using the information from smart loads.…”

Section: Introductionmentioning

confidence: 99%

Ensuring dynamic stability of constant power loads in DC telecom power systems and data centers using active damping

Pizniur

2014 IEEE 36th International Telecommunications Energy Conference (INTELEC)

Jatskevich

2014

a) (b) Fig. 1. A typical DC DER system: (a) its architecture; and (b) V-I characteristic to explain the negative incremental impedance of CPLs.Abstract -DC distribution is becoming increasingly important in telecom and buildings' power systems. The main building blocks of DC power systems are switching power converters and rectifiers that have nonlinear characteristics. When the voltages are tightly regulated, the converters will act as constant power loads (CPLs). The CPL is known to exhibit the negative incremental impedance and may cause the dynamic instability of the system. The problem associated with CPLs is traditionally tackled using passive damping which has serious drawbacks such as increased size, decreased reliability and efficiency of the system. This paper introduces an active method to inject damping current into the power bus employing an auxiliary power circuit. The proposed approach ensures that the system operates with sufficient stability margin in a small-signal sense. Comparing with previous works, the advantage of the proposed damping circuit is that the absorbed energy for damping is transferred into a neighboring bus with minimal energy losses.

“…Methods for intelligent power management based on a load-informing power paradigm shift have been proposed. Shenoy and Krein showed that communication between the load and power supply is possible and will benefit power delivery performance, e.g., load transients dynamics [14]. Tang proposed a circuit using capacitors and load predictions to feed fast load transients [15].…”

Section: Introductionmentioning

confidence: 99%

Pre-energized compact auxiliary circuit to buffer loads from fast transients with the goal of managing load-informed power

2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL)

Krein

Tse

et al. 2013

Self Cite

A pre-energized auxiliary circuit can be constructed to buffer fast load transients using advance information from an intelligent load. Such information should include the exact times of load transients and their magnitudes. This paper proposes a compact auxiliary circuit that generates a current half the magnitude of the transient. The proposed circuit builds on earlier work addressing load-informed power and operates to pre-energize the power supply. The goal is to integrate it with an intelligent load.