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

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 pre-energized 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.

[1]  Mesut Baran,et al.  DC distribution for industrial systems: opportunities and challenges , 2002, IEEE Technical Conference Industrial and Commerical Power Systems.

[2]  Siew-Chong Tan,et al.  Transient Mitigation of DC–DC Converters for High Output Current Slew Rate Applications , 2013, IEEE Transactions on Power Electronics.

[3]  F. D. Tan,et al.  A unified model for current-programmed converters , 1995 .

[4]  Dushan Boroyevich,et al.  Future electronic power distribution systems a contemplative view , 2010, 2010 12th International Conference on Optimization of Electrical and Electronic Equipment.

[5]  M. Salato,et al.  Power system architectures for 380V DC distribution in telecom datacenters , 2012, Intelec 2012.

[6]  A. Sannino,et al.  Low-Voltage DC Distribution System for Commercial Power Systems With Sensitive Electronic Loads , 2007, IEEE Transactions on Power Delivery.

[7]  A. Sannino,et al.  Feasibility of a DC network for commercial facilities , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[8]  Philip T. Krein,et al.  Power supply aware computing , 2010, 2010 International Conference on Energy Aware Computing.

[9]  T. Tanaka,et al.  Guidelines for power-supply systems for datacom equipment in NTT , 2002, 24th Annual International Telecommunications Energy Conference.

[10]  Fred C. Lee,et al.  Development of a DC distributed power system , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[11]  W. Schulz.  ETSI standards and guides for efficient powering of telecommunication and datacom , 2007, INTELEC 07 - 29th International Telecommunications Energy Conference.

[12]  Siew-Chong Tan,et al.  Pre-Energized Auxiliary Circuits for Very Fast Transient Loads: Coping With Load-Informed Power Management for Computer Loads , 2014, IEEE Transactions on Circuits and Systems I: Regular Papers.

[13]  Tadatoshi Babasaki,et al.  DC power wide spread in Telecom/Datacenter and in home/office with renewable energy and energy autonomy , 2013 .

[14]  M. Mino,et al.  High-density bidirectional rectifier for next generation 380-V DC distribution system , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[15]  Chi K. Tse,et al.  Pre-energized compact auxiliary circuit to buffer loads from fast transients with the goal of managing load-informed power , 2013, 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL).

[16]  Hyosung Kim,et al.  300V DC feed system for Internet data center , 2011, 8th International Conference on Power Electronics - ECCE Asia.