2017 Electric Ship and Technologies Symposium
2017 IEEE Electric Ship and Technologies Symposium
August 15-17, 2017, Arlington, VA
CEM had a large presence at this event, presenting the following:
Half-day tutorial session to educate the community on pulsed alternators designed to power large pulsed mission systems typical of emerging weapon and sensor platforms.
Dr. Xianyong Feng
One-hour tutorial session outlining the unique CEMSolver. This solver executable is capable of “tearing” a MATLAB SimPowerSystems model into smaller subsystems to enable parallel solution across multiple CPU cores. This capability drastically decreases solve times for increasingly complex power systems.
Dr. Robert Hebner, Dr. Angelo Gattozzi, Ms. Shannon Strank, Mr. Scott Pish, Mr. John Herbst
This presentation described a semi-quantitative comparison of the potential for advanced conventional or superconducting power cables in near future electric ships. The key conclusion was that while superconducting cables showed promise in achieving a smaller, lighter power system, the lack of engineering data on the reliability of a superconducting system in the ship environment made it likely conventional cables would be the prudent choice for, at least, the next few generations of ships. Moreover, while this de-risking is occurring, nanotechnology shows promise for making conventional cables significantly smaller and lighter.
Ms. Shannon Strank, Dr. Xianyong Feng, Dr. Angelo Gattozzi, Mr. Doug Wardell, Mr. Scott Pish, Mr. John Herbst, Dr. Robert Hebner
This presentation describes the CEM Microgrid Testbed, and outlines upgrades underway to reconfigure this environment to provide de-risk testing for the Navy Advanced Development Model. Initial testing will focus on testing control approaches to enable effective DC Fault Protection
Mr. Scott Fish, Mr. Jon Hahne, Dr. Joe Beno, Dr. Hamid Ouroua, Mr. Matt Tillman, Mr. Richard Hayes, Dr. Jerome Tzeng (Army Research Lab)
This poster presents a key technology to making smaller and lighter power systems is to use composites as structural materials in generators and flywheels. Highlights research and CEM prototypes. The faster one can safely spin the rotor in a generator or flywheel, the smaller it can be for a given application. The research team has developed technology to develop reliable composite structures for generator applications. The current approaches provide a path to maximizing the use of today’s composites and show the promise of the enhanced performance available as better composites are developed.
Dr. Xianyong Feng, L. Qi, J. Pan (ABB), and X. Huang (ABB)
The poster presents the modeling of the simulation of an approach to identify and isolate faults in dc power systems. The challenge in dc power systems is that, for the last century, the world has protected ac power systems using technology that interrupted power flow through a fault in the system by opening the circuit at a voltage or current zero. The conference had a number of papers addressing the new challenge of dc systems that do not have natural periodic zero crossings of either the current or voltage. There are two competing approaches that were presented at the symposium. One was to add hardware that would force a current zero in reaction to a fault. The other was to use sensors and controls to reduce the fault current flow to zero and isolate the faulted section. Dr. Feng and his colleagues showed that the second approach can be designed to work very well.
Dr. Angelo Gattozzi, Ms. Shannon Strank, Mr. Scott Pish, Mr. John Herbst, Dr. Robert Hebner, Dr. Fred Engelkemeir
This poster outlines alternate power converter design options that can enable near term improvement in power system performance while SiC is developed further.