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TEAMER: Over-voltage Protection of Direct Drive Wave Power System (WPS) Electrical Components Public Release

Published by Cardinal Engineering | Department of Energy | Catalog Last Checked: August 03, 2026 at 01:04 AM | Dataset Last Updated: June 11, 2026 at 06:37 PM
Public data, results, and final report from a study on methods to design and optimize an over-voltage protection (OVP) system for a floating, two-body Wave Power System (WPS). The work has been performed by assessing the conditions under which hydrodynamically induced transient over-voltage (OV) events occur, identifying means to detect these events, formulating and assessing solutions to mitigate their impact and protect embedded equipment, and performing a comparative analysis against the baseline to evaluate the impact on: 1. Power Performance (percent improvement in annual mean electrical power (MEP) at PacWave-South); 2. Capital expense (capital cost of OVP, increase over the base system); and 3. Reliability (mean time to failure (MTTF) for the improved OVP system). To perform this comparative analysis, the proposed OVP system solution was compared against a baseline, an industrial standard design for emergency fault protection in wind turbines, which included a dynamic braking chopper (DBC) for DC link protection and a standard 3-phase remote operated circuit breaker for generator disconnect. Improvement in real time DC link voltage management is necessary to minimize OV events and reduce risk to components connected to the DC link, specifically electrolytic capacitors. In practice, DC link voltage regulation between multiple inverter power sources, the generator and BESS power converters, can be achieved with advanced high-speed real-time control loops, such as PROFINET, an industrial standard for real-time communications. Modeling showed that built-in approaches to OVP, namely the DBC and BESS, can raise the trip threshold versus baseline from 7.6 RPM to 8.5 RPM, greatly increasing MEP. The modeling effort found two additional viable approaches to OVP, flux weakening and the use of a solid-state or other fast-acting disconnect switch, that further improve annual MEP and MTTF to completely fulfill the original project goals. This project is part of the TEAMER RFTS 13 (request for technical support) program.

Resources

10 resources available

  • TEAMER Overvoltage Protection Test Plan Post-Access-Report.pdf

    PDF
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  • TEAMER 13 Simulink data_README.docx

    DOCX
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  • TEAMER 13 data_README.docx

    DOCX
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  • UpdatedEnergyCalculationsRpt.m

    M
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  • energyCalculations 26FEB26.xlsx

    XLSX
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  • energyCalculations with SCR losses 26FEB26 w trip metrics.xlsx

    XLSX
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  • ov_original_data.zip

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  • overVoltageEvents teamer13 30sep2024.xlsx

    XLSX
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  • ovrVolt_30sep2024.zip

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  • Restricted Release Over-voltage Protection of Direct Drive Wave Power System WPS Electrical Components

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "019:20"
]
contactPoint 
{
  "fn": "Douglas Algera",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:dalgera@cardinaleng.com"
}
dataQuality 
true
description Public data, results, and final report from a study on methods to design and optimize an over-voltage protection (OVP) system for a floating, two-body Wave Power System (WPS). The work has been performed by assessing the conditions under which hydrodynamically induced transient over-voltage (OV) events occur, identifying means to detect these events, formulating and assessing solutions to mitigate their impact and protect embedded equipment, and performing a comparative analysis against the baseline to evaluate the impact on: 1. Power Performance (percent improvement in annual mean electrical power (MEP) at PacWave-South); 2. Capital expense (capital cost of OVP, increase over the base system); and 3. Reliability (mean time to failure (MTTF) for the improved OVP system). To perform this comparative analysis, the proposed OVP system solution was compared against a baseline, an industrial standard design for emergency fault protection in wind turbines, which included a dynamic braking chopper (DBC) for DC link protection and a standard 3-phase remote operated circuit breaker for generator disconnect. Improvement in real time DC link voltage management is necessary to minimize OV events and reduce risk to components connected to the DC link, specifically electrolytic capacitors. In practice, DC link voltage regulation between multiple inverter power sources, the generator and BESS power converters, can be achieved with advanced high-speed real-time control loops, such as PROFINET, an industrial standard for real-time communications. Modeling showed that built-in approaches to OVP, namely the DBC and BESS, can raise the trip threshold versus baseline from 7.6 RPM to 8.5 RPM, greatly increasing MEP. The modeling effort found two additional viable approaches to OVP, flux weakening and the use of a solid-state or other fast-acting disconnect switch, that further improve annual MEP and MTTF to completely fulfill the original project goals. This project is part of the TEAMER RFTS 13 (request for technical support) program.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "TEAMER Overvoltage Protection Test Plan Post-Access-Report.pdf",
    "format": "pdf",
    "accessURL": "https://mhkdr.openei.org/files/704/TEAMER%2013%20Overvoltage%20Protection-Test-Plan-Post-Access-Report-_Cardinal%20Engineering%2024%20Apr%202026.pdf",
    "mediaType": "application/pdf",
    "description": "The TEAMER post access report for this project."
  },
  {
    "@type": "dcat:Distribution",
    "title": "TEAMER 13 Simulink data_README.docx",
    "format": "docx",
    "accessURL": "https://mhkdr.openei.org/files/704/TEAMER%2013%20Simulink%20data_README.docx",
    "mediaType": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    "description": "Description of files associated with the Simulink model of the power system."
  },
  {
    "@type": "dcat:Distribution",
    "title": "TEAMER 13 data_README.docx",
    "format": "docx",
    "accessURL": "https://mhkdr.openei.org/files/704/TEAMER%2013%20data_README.docx",
    "mediaType": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    "description": "Description of files in archive"
  },
  {
    "@type": "dcat:Distribution",
    "title": "UpdatedEnergyCalculationsRpt.m",
    "format": "m",
    "accessURL": "https://mhkdr.openei.org/files/704/UpdatedEnergyCalculationsRpt.m",
    "mediaType": "application/octet-stream",
    "description": "a. Matlab file that analyzes the simulation data from "ovrVolt_30sep2024" MATLAB files using information from the system electrical simulation. 
b. Looks at the effect of different overvoltage trip points enabled by voltage mitigation means. Baseline is 7.61 RPM. Tuning of built-in measures raises to 8.5 RPM. Implementation of flux weakening raises to 10 RPM. 
c. Looks at the effect of rapidly reconnecting after a trip via a fast acting switch versus a longer off-time of a conventional circuit breaker. 
d. Cases analyzed are as follows: i. Case 1. Ideal All Energy Available ii. Case 2. Baseline (7.61 RPM) with 30 s recovery iii. Case 3. 8.5 RPM, 30s recovery iv. Case 4. 10 RPM (FW),30s recovery v. Case 5. 10 RPM (FW), 50V recovery"
  },
  {
    "@type": "dcat:Distribution",
    "title": "energyCalculations 26FEB26.xlsx",
    "format": "xlsx",
    "accessURL": "https://mhkdr.openei.org/files/704/energyCalculations%2026FEB26.xlsx",
    "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    "description": "Excel file output from "UpdatedEnergyCalculationsRpt.m""
  },
  {
    "@type": "dcat:Distribution",
    "title": "energyCalculations with SCR losses 26FEB26 w trip metrics.xlsx",
    "format": "xlsx",
    "accessURL": "https://mhkdr.openei.org/files/704/energyCalculations%20with%20SCR%20losses%2026FEB26%20w%20trip%20metrics.xlsx",
    "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    "description": "a. Excel file that processes "energyCalculations 26FEB26.xlsx" to produce Tables 1, 2, 4, and 5 in the report. "energyCalculations 26FEB26.xlsx" is to be copied and pasted into the sheet called Matlab Output.
b. Incorporates information from "overVoltageEvents teamer13 30sep2024.xlsx" on the overview tab to characterize the baseline condition. 
c. Converts overall energy from energy to average power. 
d. Calculates effects of SCR losses for cases with a solid-state switch. 
e. Formats data in a presentable way for the report."
  },
  {
    "@type": "dcat:Distribution",
    "title": "ov_original_data.zip",
    "format": "zip",
    "accessURL": "https://mhkdr.openei.org/files/704/ov_original_data.zip",
    "mediaType": "application/zip",
    "description": "Contains MATLAB file "N7638cs81.mat", the wave data set with the highest velocity waves. To analyze other data, move the appropriate *.mat file to this directory and change the filename called within "Init_PMSG_System.m"."
  },
  {
    "@type": "dcat:Distribution",
    "title": "overVoltageEvents teamer13 30sep2024.xlsx",
    "format": "xlsx",
    "accessURL": "https://mhkdr.openei.org/files/704/overVoltageEvents%20teamer13%2030sep2024.xlsx",
    "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    "description": "Spreadsheet summarizing data describing the simulation output data in folder "ovrVolt_30sep2024". Worksheets: i. mat file variables - variable names and descriptions. Model description. ii. overview - Summary of model output iii. ovrVolt - description of each overvoltage event (trip threshold 7.61 RPM)"
  },
  {
    "@type": "dcat:Distribution",
    "title": "ovrVolt_30sep2024.zip",
    "format": "zip",
    "accessURL": "https://mhkdr.openei.org/files/704/ovrVolt_30sep2024.zip",
    "mediaType": "application/zip",
    "description": "Collection of MATLAB *.mat files. This is data correlating wave state to PMG output characteristics. A description of the data is provided in the spreadsheet "overVoltageEvents teamer13 30sep2024.xlsx". Generated by C-Power using Ansys AQWA NAUT v16."
  },
  {
    "@type": "dcat:Distribution",
    "title": "Restricted Release Over-voltage Protection of Direct Drive Wave Power System WPS Electrical Components",
    "format": "HTML",
    "accessURL": "https://mhkdr.openei.org/submissions/701",
    "mediaType": "text/html",
    "description": "Link to the restricted release data, results, and report for the "TEAMER: Over-voltage Protection of Direct Drive Wave Power System (WPS) Electrical Components" project. "
  }
]
identifier https://data.openei.org/submissions/8699
issued 2026-05-01T06:00:00Z
keyword 
[
  "Excel",
  "Hydrokinetic",
  "MHK",
  "Marine",
  "Matlab",
  "OVP",
  "RFTS13",
  "TEAMER",
  "WPS",
  "Wave Power System",
  "capital expense",
  "code",
  "energy",
  "over-voltage",
  "over-voltage protection",
  "power",
  "power system model",
  "preformance",
  "two-body Wave Power System"
]
landingPage https://mhkdr.openei.org/submissions/704
license https://creativecommons.org/licenses/by/4.0/
modified 2026-06-11T18:37:06Z
programCode 
[
  "019:009"
]
projectLead Lauren Ruedy
projectNumber EE0008895
projectTitle Testing Expertise and Access for Marine Energy Research
publisher 
{
  "name": "Cardinal Engineering",
  "@type": "org:Organization"
}
spatial 
"{"type":"Polygon","coordinates":[[[-180,-83],[180,-83],[180,83],[-180,83],[-180,-83]]]}"
title TEAMER: Over-voltage Protection of Direct Drive Wave Power System (WPS) Electrical Components Public Release

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