DC Bi-Directional Supply for Battery Emulation Testing and Solar Simulation SOW.pdf

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

GLENN RESEARCH CENTER

CLEVELAND, OHIO

DC Bi-Directional Supply for Battery Emulation/Testing and Solar Simulation Specifications

Introduction/Background

The Advanced Reconfigurable Electric Aircraft Laboratory (AREAL) is a test facility at Glenn Research Center (GRC) that allows the testing of high- power equipment for eventual use in hybrid-electric aircraft systems. AREAL is part of the Revolutionary Vertical Lift Technology (RVLT) project. The RVLT project is exploring multiple technologies that would enable electric or hybrid-electric aircraft, resulting in quieter, more fuel-efficient, and more environmentally-friendly flight.

Scope of Work NASA GRC needs one multi-purpose battery emulator/tester and solar array simulator for testing and development purposes. The requirements are given below.

System Input Power Requirements:

• Shall have an AC input with the following nominal specifications:

480Vac,LL 60Hz 3 Phase Shall include an appropriately sized transformer to provide galvanic isolation between the unit and the facility

System Output Power Requirements:

• Shall have a DC Output with the following minimum rated specifications:

Fully bi-directional +/- 250kW 1000Vdc +/- 1125A Programmable Current Output (CC Mode) Programmable Voltage Output (CV Mode) Programmable Power Output (CP Mode)

• Shall have a DC Output with the following minimum rated specifications for dynamic performance:

200 Hz small-signal bandwidth (voltage-mode) 800 Hz small-signal bandwidth (current-mode) Peak voltage slew-rate no less than 100V/ms Peak current slew rate no less than 2kA/ms Output voltage regulation with no greater than 0.1% full-scale error

Emulation Capabilities

• The system shall have the capability to emulate batteries with the following requirements:

Emulate lithium-ion and lead-acid chemistries Emulate using the Partnership of New Generation of Vehicle (PNGV) lumped equivalent battery circuit models Track state-of-charge

• The system shall have the capability to emulate solar arrays with the following requirements:

Incorporate irradiance effects on output performance.

Incorporate temperature effects on output performance.

Contain fully customizable photovoltaic curve capability

• The system shall have the static ability to compensate for voltage drop across on output cable

• The system shall have the dynamic capability to compensate for voltage drop across on output cable

Test Capabilities:

• The system shall have the capability to perform battery cycle testing

• The battery cycle test capabilities shall have integrated watt-hour, amp-hour, and open-circuit voltage measurements.

• The system shall have the capability to generate programmable at least 200 Hz sine-wave ripple on top of the voltage, current or power.

Safety

• The system shall have a hardware interlocked e-stop

• The system shall have a dedicated facility interlock

Control/Telemetry

• The system shall have a local touchscreen for manual control and troubleshooting

• The system shall have remote control capability with the following inputs:

Ethernet (TCP/IP) Input CAN 2.0B Input Analog/digital Input/Hardware-in-the-loop

System to include external air-cooled (natural convection) 275 kVA transformer with 480 VAC L-L Delta primary and 480 VAC L-L Y with floating neutral secondary and 60,000 BTU/HR indoor heat exchanger with dynalene hot-side fluid

Objective Expand capability of the AREAL to include a battery emulator as an additional source for hybrid-electric flight. This will enhance the lab’s ability to emulate different battery chemistries and power levels.

Description of the Work/Contractor Tasks The contractor task consists of providing power supply. No meetings or reviews are expected for this off-the-shelf equipment.

Deliverables The deliverable for this procurement is for one power supply for battery emulation and solar simulation.