Restricted Research - Award List, Note/Discussion Page

Fiscal Year: 2018

1329  The University of Texas at Arlington  (74834)

Principal Investigator: Dr David Wetz Jr

Total Amount of Contract, Award, or Gift (Annual before 2011): $ 689,335

Exceeds $250,000 (Is it flagged?): Yes

Start and End Dates: 7/14/17 - 11/30/18

Restricted Research: YES

Academic Discipline: Department of Electrical Engineering

Department, Center, School, or Institute: College of Engineering

Title of Contract, Award, or Gift: Installation of a 150 kW Medium Voltage AC/DC Testbed for Simulation and Modeling of Distributed Generation Shipboard Electrical Power Systems (DG-SEPSs)

Name of Granting or Contracting Agency/Entity: Office of Naval Research (ONR)

Program Title: N/A
CFDA Linked: Basic and Applied Scientific Research


This proposal requests funds to procure and install a one-of-a-kind, 150 kW medium voltage AC/DC test bed that will be utilized in conjunction with existing hardware in the University of Texas at Arlington’s (UTA’s) Pulsed Power and Energy Laboratory (PPEL) to simulate and model distributed generation shipboard electrical power systems (DGSEPSs). The US Navy’s next generation DGSEPSs will rely upon electrical generation from several interconnected sources that will include, but are not limited to, diesel turbine generators, flywheels, and electrochemical batteries. Integration and control of both AC and DC sources within a single power system is not an easy task but is required to make next generation power systems a reality given the uniqueness of loads planned for deployment. Many have proposed that AC and DC generation sources be interconnected on a medium voltage DC (MVDC) bus and voltages as high as 6 kVDC to 12 kVDC, have been proposed. All of the sources and loads will be autonomously operated using real time control and many loads will continuously operate while others will operate in a pulsed mode of operation drawing short/repetitive bursts of power. The use of fossil fuel driven generation alone for driving these types of pulsed power loads is not practical as it is very hard on the generator, both mechanically and electrically, to supply energy in short bursts with intermediate periods of inactivity. Electrochemical batteries and capacitors have been proposed to augment the fossil fuel generation, acting as both a source to the load and as a load themselves to the diesel generation during periods of inactivity. For the past six years, the UTA PPEL has been studying the performance, reliability, and aging of electrochemical cells when cycled at high rates at the material, cell, module, and even 1000 VDC level respectively. Through support from ONR, the PPEL has already designed and installed three – 1000 V electrochemical batteries and initiated efforts aimed at studying battery integration using hardware in the loop (HIL). With the funds proposed here, the PPEL will procure a 150 kW dynamometer/generator pair to generate 480 VAC and a 480 VAC to 4160 VAC voltage transformer to emulate the Navy’s diesel and gas turbine engine / generator sets. A multi-pulse AC/DC rectifier will be procured to rectify the 4160 VAC to 6 kV DC for connection onto a 6 kV MVDC bus. A programmable DC/DC converter is already on hand that will interconnect the existing 1 kV batteries onto the 6 kV MVDC bus and an AC/DC converter will be procured so that the generator can be loaded by the 1 kVDC battery during periods of inactivity. All of the sources and loads will be controlled using an OPAL-RT HIL platform already installed in the PPEL. A 1.0 MJ capacitive load, which is already installed, will be utilized in conjunction with a 6 kV resistive load that is proposed for purchase here. The resulting one-of-a-kind MVDC architecture will be easily modular and will enable the PPEL to assist ONR Codes 33/35 in identifying, understanding, and overcoming the challenges associated with integrating 1 kVDC hybrid energy storage modules (HESMs) into the 4160 VAC generation system so that both can be deployed in future electrical ships to supply complex continuous and pulsed AC/DC loads.

Discussion: No discussion notes


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