Driving economic growth, educational innovation, and workforce development for South Carolina

Clemson University Restoration Institute

Dr. Nikolaos RigasAssociate Director

…keeping the best and the brightest…accelerating new innovations into the market…securing an innovation economy…creating new economic opportunities…fostering public / private partnerships…developing the workforce of the future

It’s about…

KEY TECHNICAL AREAS Power Systems, Systems Engineering, Logistics, Materials, Water Ecology, Workforce Development and K-12 STEM

‘Accelerating New Technologies to Market and Educating the workforce of the future’

GRADUATE PROGRAMS200 Graduate Students12 Faculty40 Research Scientist and Staff

Zucker Family Graduate Education Center

Phased Expansion Linking Education and Public /Private Research Facilities

Graduate Education Programs (200 Graduate Students) TT appointments in CoES departments (12) Research Scientists and Staff (40) Education & research programs in: Smart Grid Energy Systems Logistics Materials Mechatronics Water Ecology

Who will be Located at the CURI Energy Campus?

Complements 20 Main Campus Faculty in Energy

Related Areas

Energy Systems Innovation Center

Objectives: Accelerate the development of new technology into the electrical market to reduce the cost of energy delivered.

Establish long term partnerships with industry for work force development, research and education.

Energy Systems Innovation Center: Facility Layout

World-class mechanical and electrical testing infrastructure for wind turbines and other multi-megawatt devices.

Grid Simulator

7.5 MW Test Bench

15 MW Test Bench

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Value Proposition

• Improved preventative maintenance program and operations.

• Reproduce critical field events.

• Testing and failure analysis.

$$ Lower cost of energy delivered $$

Wind Turbine Powertrain

Simulating the Simulator

Physical System

Hardware Simulator of

Physical System

15 MW Hardware In the Loop (HIL)

electric grid simulator

7.5 MW and 15 MW wind

turbine nacelle test benches

Mathematical Simulation of

Hardware Simulator

MATLAB,Simulink,

FPGA models of grid simulator

equipment

MATLAB,Simulink, Simpack

models of test benches and DUT

Naturally Interact

Simulation

Naturally Interact

Determining Natural Frequencies of the System

7.5 MW Wind Turbine Test Facility

15 MW Wind Turbine Test Facility

15 MW Hardware-in-the-Loop Grid Simulator - Overview

Electrical Equipment Under Test

Hardware-in-the-Loop Grid Simulator

Advanced Converter Technology

Real Time Digital Simulator

Simulated Power System

A power system is simulated and reproduced in real-time in order to assess grid compatibility of the device.

Dedicated Power System Substation

Experimental, prototype, and commercializedelectrical equipment can be rigorously testedwithout exposing the power system to the risksinvolved with field testing.

Project Partners

Duke Energy

Santee Cooper

Savannah River National Laboratory

SCANA

TECO-Westinghouse Motor Company

U.S. Department of Energy, EERE

23.9 kV Utility Bus

7.5MW Test Stand

15MW Test Stand

Graduate Education Center500 kW Solar Array

23.9 kV 20 MVA Test Bus

Experimental Bay #1Experimental Bay #2Experimental Bay #3

15 MW HIL Grid Simulator

Up to three independent grid integration tests can run simultaneously in each of the three experimental bay’s

4.16 kV 5 MVA Test Bus

NSF and Duke Energy FundedSituational Control Room Lab

15 MW Grid Integration Testing, Research and Education Facility

& ¢̈«̈³̧ 3̈­¦«¤ ,̈­¤ $  ̈¦± ¬

Variable 23.9 kV (50/60 Hz)

23.9 kV (60 Hz) Utility Bus

Market ApplicationsEV Charging Stations Utility Scale Energy Storage

Large Solar PV Converter

Traditional Distributed Generation (Diesel, NG. etc.)

Micro-Grid Applications

Wind Energy

Large Inverters

Aerospace

Integrating new technologies into the electrical grid

• Power Set Points• Voltage and Frequency Variations• Controls Evaluation

• Power Set Points• Voltage and Frequency Variations• Controls Evaluation

Steady State and Envelope Evaluations

• Voltage Flicker• Harmonic Evaluations• Anti-Islanding (Software)

• Voltage Flicker• Harmonic Evaluations• Anti-Islanding (Software)

Power Quality Evaluations

• Frequency Response• Active Volt-VAR Control• Active Frequency Regulation

• Frequency Response• Active Volt-VAR Control• Active Frequency Regulation

Ancillary Services

• Low Voltage Ride-Through (LVRT)• Unsymmetrical Fault Ride-Through• High Voltage Ride-Through HVRT)

• Low Voltage Ride-Through (LVRT)• Unsymmetrical Fault Ride-Through• High Voltage Ride-Through HVRT)

Grid Fault Ride-Through Testing

• Recreation of field events with captured waveform data

• Recreation of field events with captured waveform dataOpen Loop Testing

• Simulated dynamic behavior and interaction between grid and the device under test

• Simulated dynamic behavior and interaction between grid and the device under test

Hardware-In-the-Loop Testing

Increasing level of difficulty

RTDS®

National InstrumentsInterface Controller

Voltage and Current Set Point Commands

Real Voltage and Current Measurements

15 MW TECO-Westinghouse Power Amplifier

BUS #NVoltage and Current

Information

Wind Turbine“I’m connnected at Bus #N”

Solar Inverter“I’m connnected at Bus #N”

Utility Battery Storage“I’m connnected at Bus #N”

Micro and Smart Grids“I’m connnected at Bus #N”

Megawatt Generator“I’m connnected at Bus #N”

Real Voltages and Currents associated with BUS #N

Variable FrequencyGenerators

“We’re connected at Bus #N”

Hardware-in-the-Loop Testing

HIL Testing Capabilities: Wind Energy Applications

Wind Farm and Collector Bus Experiments

Parallel Model Verification

Simulated Grid Bus

• Classic lumped WTG stability study

• Disturbances external to the farm

• Classic lumped WTG stability study

• Disturbances external to the farm

Wind Farm Modeling

• Model several WTGs in parallel• Disturbances internal to the farm• Model several WTGs in parallel• Disturbances internal to the farm

Collector Bus Modeling

• Present the same test case to both a simulated machine and the actual WTG under test

• Present the same test case to both a simulated machine and the actual WTG under test

Parallel Model Verification

• Offshore versus land based• Stiff versus weak grid conditions• Offshore versus land based• Stiff versus weak grid conditions

Application Specific Issues

Fault Ride-Through Options with the Grid Simulator

Reactive Divider Uncontrolled

Well established method

Trial and error method with low

SC ratios

Converter Only

More flexible test method

Exposes converter to DUT fault duty

Controlled Reactive Divider

Clemson Solution

Increased In-Fault voltage accuracy

Allows for high DUT fault duties

• Clemson’s unique combination of a power converter and reactive divider network provides several different testing options

• For smaller machines, Clemson approach to Fault Ride-Through (FRT) testing is backwards compatible with the two existing methods of performing FRT evaluations

• The first test article will provide the platform for Clemson researchers to evaluate advantages of all three methods and their impact on the DUT

Electrical Capabilities

Overall Facility Electrical Capabilities

Main Test BayNominal Voltage 24 kV (50/60 Hz)Nominal Power 15 MVA (7.5 MVA)Frequency Range 45 to 65 HzSequence Capabilities 3 and 4 wire operationOvervoltage capabilities 133% Continuous OvervoltageFault Simulation Yes (includes Reactive Divider)Hardware-In-the-Loop Yes (limit 1 HIL total)Small Test Bay 1Nominal Voltage 4160 V (50/60 Hz)Nominal Power 3.75 MVA (3 MW @ 0.8 PF)Frequency Range 45 to 65 HzSequence Capabilities 3 and 4 wire operationOvervoltage capabilities 133% Continuous OvervoltageFault Simulation Limited to Converter OnlyHardware-In-the-Loop Yes (limit 1 HIL total)Small Test Bay 2Nominal Voltage 4160 V (50/60 Hz)Nominal Power 3.75 MVA (3 MW @ 0.8 PF)Frequency Range 45 to 65 HzSequence Capabilities 3 and 4 wire operationOvervoltage capabilities 133% Continuous OvervoltageFault Simulation Limited to Converter OnlyHardware-In-the-Loop Yes (limit 1 HIL total)

Three Independent Test Bays

Developing new technologies and driving innovation…(patent submitted)

Thank You…

…..Questions?