Category: AC Load

The Benefits of Regenerative Loads & Sources

Utility Grid Testing - NH Research (NHR)

Intro to Regenerative Loads & Sources

Traditional loads, either air-cooled or water-cooled, convert the unit-under-test’s (UUT) output power into heat waste whereas regenerative loads recycle the UUT output power back onto the facility or UUT in the form of re-usable electricity. This allows the test system to lower the total electrical usage while significantly reducing waste heat. For example a regenerative load with > 90% efficiency would return more than 90% of the UUT’s output power back to the facility and convert less than 10% of the UUT power into heat.

Traditional Electronic Loads vs. Regenerative Loads

An electronic load converts 100% of the discharge power (P = V*I) directly into heat. Unlike resistors, electronic loads are able to provide more sophisticated loading profiles such as constant current, constant voltage, and constant power, in addition to constant resistance. The load profile can be changed dynamically without disconnecting the UUT. Air-cooled electronic loads dissipate the waste heat into the air and can be used anywhere in a laboratory or manufacturing space as long as there is sufficient space or air-chiller capacity. Water-cooled electronic loads dissipate the waste heat through a water connection, which limits where these loads can be used. Testing may also get halted when the water-chiller system is under maintenance.

Regenerative electronic loads convert discharge power (P = V*I) back into usable electricity for the facility, thereby increasing flexibility in two ways. First, the total power demand and associated electrical costs are reduced. Second, regeneration creates significantly less waste heat, which in turn reduces  the energy and equipment required for facility cooling. This allows maximum flexibility when planning, upgrading, or rearranging laboratory or manufacturing workspaces.

Regeneration Significantly Reduces the Cost of Heat

Using regenerative AC and DC loads and sources dramatically reduces the total amount of power required from the utility.  This is because the UUT can use the power from both the utility connection and the power returned by the regenerative load. This directly reduces the total amount of power used by the facility to conduct the required testing, the amount of waste heat, and the power to remove the heat. Additionally, the total cost of ownership of traditional loads often includes far more than just the initial purchase of the load. Traditional loads imply more electrical usage and higher electrical usage may require electrical system upgrades to support additional test stations. Each new station will generate significant amount of waste heat, which may require facility modifications such as new air-handlers or water-chiller connection points. All these costs can be associated with simply trying to remove waste heat.

NHR Regenerative Test Solutions

NH Research (NHR) provides regenerative AC and DC loads with expandable power to meet future higher test-power needs. This modular design allows for maximum flexibility in test by providing unmatched configuration options as well as future scalability. Both AC and DC products are bi-directional allowing them to reverse power flow using the same internal electronics.

Regenerative AC/DC Loads and Sources:

To learn more about potential cost savings , download our Regenerative Loads and Sources Application Note.

Download “Regenerative Loads & Sources” App Note

NHR Presents at Intersolar 2020: Managing the Impacts of Electrification on the Grid

Power Lines Field

NH Research Inc., (NHR) a leading provider of power testing instruments and systems for the automotive, renewable energy, energy storage, and critical-power markets, will be presenting at Intersolar North America 2020.

Martin Weiss, Product Director at NH Research, will present in a talk entitled, “Bi-directional Test Solutions to Manage the Impacts of Electrification on the Grid”. In this session, he’ll share test solutions used by the industry to evaluate electric loading profiles and use cases for EVs, micro-grid, V2G and energy storage applications. This presentation will also review key factors in selecting the right test solution and industry use cases.

NHR Presentation Track: Managing the Electricity Load on the Grid: The Role & Impact of Vehicle Charging
Event: Intersolar North America, 2020
Dates: Feb 4th from 3pm to 4:15pm
Location: San Diego Convention Center, Room 9

Presentation Description:

Bi-directional Test Solutions to Manage the Impacts of Electrification on the Grid

EV DC Fast Charging deployments are accelerating. The ability to simulate these loading profiles is critical for: validating sophisticated load management systems and assessing the impact on the grid. Regenerative bi-directional sources, grid simulators and battery emulators are the engineer’s tool for testing new power management systems, solar (PV), energy storage systems, EVs and DC fast chargers. These bi-directional capabilities are especially ideal for utility companies to test and understand the impacts of e-mobility and grid-tied devices (DG and V2G) on the grid. Simulating the bidirectional power flows to and from the grid substantially speeds up testing time and reduces energy costs.

Key Presentation Takeaways:

• Identify power test approaches for strategic load management & utility grid testing
• Learn about next gen technologies for simulating real-world conditions & load profiles
• Industry use cases

NHR’s flexible test solutions include: 9200 & 9300 bi-directional DC power, 9410 regenerative grid simulator, 9410 AC Source and 9430 4-Quadrant AC loads.

For more information, contact us at 949-474-3900 or visit: https://nhresearch.com.

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NHR Presents at the Automotive Testing Expo 2019 in Novi, Michigan

High Voltage Battery Test System 9300 - NH Research, Inc. (NHR)NH Research Inc., a leading provider of power testing instruments and systems for the automotive, industrial, energy storage, and critical-power markets, will be showcasing industry leading test solutions at the Automotive Testing Expo 2019. The advanced testing solutions being demonstrated include Battery Cyclers, Battery Emulation Systems, Grid-Simulators, and AC Loads.

Visit booth # 9018 to learn about NHR’s flexible and expandable EV test solutions across DC Fast Chargers, Powertrain, power conversion and other e-mobility and transportation applications. Our application experts will be on-hand to demonstrate NHR’s flexible 9200 & 9300 series battery module and pack test systems, 9410 regenerative grid simulator, and 9430 4-Quadrant AC loads.

Fully integrated test platforms are implemented with NHR’s Enerchron® Test Management Software. This powerful, yet intuitive software tool synchronizes any combination of testing devices including NHR’s instruments; communications (CAN/MODBUS); other commonly required equipment (DAQ); relay controllers; chambers/chillers; and more. Stop by for a software demonstration.

Event: Automotive Testing Expo 2019
Location: Novi, Michigan
Dates: October 22-24th, 2019
Visit Booth: #9018

For more information on our EV Test Solutions, visit our application page at https://nhresearch.com/power-electronics-application-test-solutions/ev-powertrain-testing/.

About NH Research
NH Research, Inc. (NHR) enables electrification by accelerating innovation, validation and functional test of today’s technologies. Backed by over 50 years of experience in power conversion and power supply test systems we provide world class test instruments and systems. Our solutions provide the performance, simplicity, and safety that engineers and researchers desire.

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