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CHAPTER 4 Capstone OPERATING MODES CHAPTER 4: OPERATING MODES This section describes the Grid Connect and Stand Alone operating modes, including transitions between these operating modes, MultiPac operation, and Dispatch modes. Grid Connect Introduction Grid Connect mode allows the C1000 MicroTurbine package to be connected in parallel with an electric utility. When a utility grid disturbance occurs, the integrated protective relay functions of the 200 kW MicroTurbine power modules will automatically shut down the system. The C1000 package can restart automatically to resume supplying electricity to connected loads once grid power returns to normal. In Grid Connect mode, the C1000 MicroTurbine generator package is a current source only - the MicroTurbine synchronizes to the electric utility for both voltage and frequency reference. The MicroTurbine can be used to provide base load power or shave peak power based on loads or user commands. Features Grid Connect functionality and user benefits are optimized in the C1000 MicroTurbine package through several advanced features of the C1000 controller. Besides optimizing turbine efficiency for a given power output and minimizing emissions, the C1000 controller will balance power module run times and offers numerous custom and time of use controls for precise dispatch of power according to the user’s needs. The time of use feature includes programmable peak shaving functions, which automatically configure the MicroTurbine package to operate on a time schedule or to follow local loads during specific time periods, reducing peak demand charges. These special features are described as Time of Use and Load Following dispatch modes later in this chapter. Time of Use supplies variable power levels at selected times to meet user load demand. Load Following tracks local electrical loads to supply power on an as-needed basis. The C1000 controller also includes Modbus, discrete, and Ethernet interfaces to external systems, such as utility power meters, rate meters or Building Management Systems. These interfaces can provide even better optimization of your electrical generation and heat recovery needs, providing optimized operational modes based on electric demand, heat demand and utility pricing. Reverse Power Flow Protection is easily included and prevents the MicroTurbine system from backfeeding power to the grid. Implementation of Load Following mode and Reverse Power Flow Protection requires installation of an external power meter and/or a timer or switch. The external power meter provides information to the MicroTurbine on power flow at a point between the MicroTurbine and the grid power supply. 410072 Rev A (January 2009) Page 4-1 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.PDF Image | CAPSTONE C1000 MICROTURBINE SYSTEMS TECHNICAL REFERENCE
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