Testing and Development Activities of Meter-Base Switches for DER Applications Power Systems 2005 Conference, Clemson University March 9-11 2005 Panel Session on Interconnection: Doeg Rodriguez Doeg Rodriguez Tom Key Tom Key Univ. of Puerto Rico Univ. of Puerto Rico EPRI Solutions EPRI Solutions Mayagüez, PR Mayagüez, PR Knoxville, TN Knoxville, TN [email protected][email protected](787) 505-7783 (865) 218-8082
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Testing and Development Activities of Meter-Base Switches for DER Applications Power Systems 2005 Conference, Clemson University March 9-11 2005 Panel.
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Testing and Development Activities of Meter-Base Switches for DER Applications
Power Systems 2005 Conference, Clemson University March 9-11 2005
Panel Session on Interconnection:
Doeg RodriguezDoeg Rodriguez Tom KeyTom KeyUniv. of Puerto RicoUniv. of Puerto Rico EPRI SolutionsEPRI SolutionsMayagüez, PRMayagüez, PR Knoxville, TNKnoxville, [email protected][email protected](787) 505-7783 (865) 218-8082
A0 Energize one leg gen. circuit while in utility mode Loss of line Single Line Gen. Energization
A1 Energize one leg gen. circuit while in utility mode Loss of line Single Line Gen. Energization
A2 Energize one leg gen. circuit while in gen. mode Loss of line Single Line Gen. EnergizationA3 Disconnect one leg gen. while serving load Loss of line Single Line Gen. Dropout
A4Disconnect one leg gen. while serving load/ Decrease voltage on remaining phase until transfer
Loss of lineSingle Line Gen. Dropout / Undervoltage Magnitude
A5Energize one leg utility, while in gen. mode / Gen. serving load
Loss of line Single Line Utility Energization
A6Energize one leg utility, while in gen. mode / Gen. un-energized
Loss of line Single Line Utility Energization
A6BEnergize one leg utility, while in utility mode / Gen. un-energized
Loss of line Single Line Utility Energization
A7BIncrease utility voltage from zero on both legs simulatenously until transfer
Voltage Disturbance Utility Pickup Voltage Magnitude
A8BIncrease gen. voltage on both legs simultaneously until transfer
Voltage DisturbanceGenerator Pickup Voltage Magnitude
A9BDecrease utility voltage on both legs simultaneously until transfer / Generator Offline
Voltage Disturbance Utility Undervoltage Magnitude
A10Decrease gen. voltage on both legs simultaneously until transfer
Voltage Disturbance Generator Undervoltage Magnitude
A11 De-energize utiltiy and energize gen. Loss of Utility Utility OutageA15 Energize Generator / utility serving load Paralleling ParallelingA17 Energize utility / Gen. serving load Reconnection Utility ReturnA18 Energize utility and de-energize gen Reconnection Utility ReturnA20 Increase voltage on utility source until transfer Voltage Disturbance Utility Overvoltage Magnitude
A21 Increase voltage on generator source until transfer Voltage Disturbance Generator Overvoltage Magnitude
A device that provides a gateway connection with programmable protection for on-site generation systems operating in parallel with the grid or operating as an island
(GridGateway to have 18 programmable protective functions)
The primary functions of the device are to provide protection for the utility from incorrect operation of the DR and to provide a means for safely interconnecting a synchronized DR to the Utility/Residence circuit.
• The GG handles any normal switching or paralleling functions, e.g. transfer, MBB or BBM, etc.
• Utility will use the laptop communication port and set up based on the application and input form end user. If end user changes the DG or Application utility reconfigures.
• End user has control to select "utility preferred" or "generator preferred," and can lockout either source via local circuit breakers.
• Eventually control wiring will be required between the GG and the DG for voltage regulator and governor control following standards for parallel interconnection.
• Potential for external supervisory control via GG, such as generator dispatch or load shedding is consideredin the logical design.
0. Basic manual transferBasic manual transfer – starts with primary source closed, as default configuration for troubleshooting the unit (no protective functions)
1. Open transition transferOpen transition transfer - follows the Generlink functionality (break-before-make operation)
2. Closed transition transferClosed transition transfer - momentary paralleling in the range of 1 to 5 seconds for uninterrupted transfer applications (make-before-break operation)