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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Protective Relay Functions for Capstone MicroTurbines Power Controller Operation Overview Figure 2 shows a block diagram of the MicroTurbine installed in Grid Connect mode. A gas turbine engine integral with a high-speed permanent magnet generator is called the turbogenerator. The Power Controller converts high frequency power from the turbogenerator into 50/60 cycle AC power. The Power Controller also regulates fuel supply to the turbogenerator. During the startup sequence, power flow through the Power Controller is reversed. Grid power is used to motor the turbogenerator. When power is available from the turbogenerator, the Power Controller converts generator output to a 3-phase 50/60 HZ power synchronized with the utility grid. Figure 2. Capstone MicroTurbine – Functional Block Diagram NOTE: It is essential for safe operation and service that a current limiting disconnect device be installed between the Power Controller and the utility grid. Local electric codes will almost always require such a disconnect. The added protection of this disconnect device is not considered here. Power Controller Components and Function The operation and power conversion functions of the MicroTurbine are controlled by the Power Controller. Major components of the Power Controller are two 3-phase inverters, power-conditioning equipment, a microprocessor-based system controller, and an auxiliary power supply for the controls. 410033 Rev. D (February 2006) Page 2 of 10 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the equipment specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference Protective Relay Functions for Capstone MicroTurbines
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