PDF Publication Title:
Text from PDF Page: 015
Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Protective Relay Functions for Capstone MicroTurbines The microturbine can be configured to provide reverse power flow protection in two different ways. Either method requires an external device be installed at the appropriate point in the distribution circuit to measure power flow. Utilities are normally most concerned about power flow back into their utility grid, and measure this flow at a Point of Common Coupling (or PCC) with onsite generating equipment. The three basic methods are: • Power meter with pulse outputs to the microturbine • Power meter with Modbus output to C1000 Series control system • Reverse power relay with trip signal to the microturbine. 4.6.1. Power Meter with Pulse Outputs The C30, C65 and C200 microturbine models can be programmed to initiate a Normal Shutdown by installing a power meter with pulse outputs at the utility point of common coupling. Two pulses are required. Once pulse to detect power being imported, and the other to detect power being exported. The reverse power protective function uses the exporting pulse, and can be configured to initiate a Normal Shutdown when reverse power flow is measured for a duration of 0 to 120 seconds. Note that an overall response time of zero (0) seconds cannot be realistically achieved. The minimum duration depends on the kWh-per-pulse calibration factor of the power meter and the magnitude of the reverse power flow. In practice, if the duration is set as 0 second, the shutdown will be initiated when the first reverse power flow pulse is received. Normal Shutdown allows cooldown of the microturbine to occur as opposed to a Grid Fault warmdown (shutdown) caused by the microturbine's integrated voltage, frequency, and anti- islanding protection. 4.6.2. Power Meter with Modbus Output The C1000 Series microturbine models can be programmed to initiate a Normal Shutdown by installing a power meter with Modbus protocol at the utility point of common coupling. Custom programming is required to integrate the Modbus power meter, determine the required export kW limit and duration. This will be defined by the local Utilities interconnection agreement. Normal Shutdown allows cooldown of the microturbine to occur as opposed to a Grid Fault warmdown (shutdown) caused by the microturbine's integrated voltage, frequency, and anti- islanding protection. 4.6.3. Reverse Power Relay with Trip Signal The C30, C65, C200 and C1000 Series microturbine models can be programmed to accept a fault input from a reverse power flow relay, to initiate a Grid Fault Shutdown when reverse power flow is detected. The shutdown can be configured to be a Normal Shutdown (cooldown) or a warmdown. Refer to Shutdown section for further information. 410033 Rev H (December 2013) Page 15 of 17 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. NOTE: Some regulatory agencies and utilities have rigid requirements regarding proper reverse power flow to the utility during grid disturbances. In this case, the best approach is to use a utility-approved reverse power flow relay to provide a trip signal to the microturbine. The relay trip signal output should interface with one of the microturbine digital fault inputs and be software configured to fault severity level 4 (warmdown). When properly setup, the main output contactor on the microturbine will open to stop exporting power as soon as a trip signal from the reverse power protective relay is detected.PDF Image | Technical Reference Protective Relay Functions for Capstone Microturbines
PDF Search Title:
Technical Reference Protective Relay Functions for Capstone MicroturbinesOriginal File Name Searched:
410033H_TR_PROTECTIVE_RELAYS.pdfDIY PDF Search: Google It | Yahoo | Bing
Capstone Turbine and Microturbine: Capstone microturbines used and new surplus for sale listing More Info
Consulting and Strategy Services: Need help with Capstone Turbine, sizing systems, applications, or renewable energy strategy, we are here to assist More Info
Container Lumber Dry Kiln: Since 1991 developing and innovating dry kilns using standard shipping containers More Info
Supercritical CO2 Lumber Dry Kiln: Compact fast drying in 3 days or less for small amounts of wood and lumber drying More Info
BitCoin Mining: Bitcoin Mining and Cryptocurrency... More Info
Publications: Capstone Turbine publications for microturbine and distributed energy More Info
FileMaker Software for Renewable Energy Developing database software for the renewable energy industry More Info
CO2 Gas to Liquids On-Demand Production Cart Developing a supercritical CO2 to alcohol on-demand production system (via Nafion reverse fuel cell) More Info
Stranded Gas for low cost power Bitcoin Mining Using stranded gas for generators may provide breakthrough low power costs for cryptocurrency miners. More Info
| CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com | RSS | AMP |