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CHAPTER 4 Capstone OPERATING MODES Configuring Grid Connect Mode The C200 microturbine must be told what mode to operate in. This requires both hardwire connections in the User Connection Bay, and software commands from the front panel display or through one of the serial communications ports using a PC with CRMS. To operate in Grid Connect mode, the following needs to be done: Set the System “Power Connect” mode to “Grid Connect” using the Display or using a PC with CRMS. Provide external control connections to the Grid Connect enable input in the User Connection Bay. Refer to Dual Mode below for a discussion of how to switch between Grid Connect and Stand Alone modes. Refer to Chapter 10: Communications in this document for details on pin connections. In addition to this Grid Connect mode setup, means to start and stop the system must be configured. The sections below provide additional functions to be considered for setting up dispatch modes. The Chapter 10: Communications provides description of other input and output options, including Emergency Stop and fault inputs. Note that setting Auto Restart to ENABLE impacts both Grid Connect and Stand Alone operating modes. Separate adjustable timers can be used to set different restart time delays for Grid Connect and Stand Alone modes. These timers are only adjustable using CRMS. The system power demand will also need to be set. Refer to the C200 Users Manual (400008) and CRMS Technical Reference User’s Edition (410013) for configuring all these settings. Auto Restart A system operating in Grid Connect can be set to automatically attempt a restart after low-severity incident-driven shutdowns. If Auto Restart is ON, the system will attempt to restart after a shutdown due to any fault condition that is severity level 3 or less. This feature may be enabled with any of the dispatch modes described below. Capstone recommends enabling Auto Restart to increase system availability, deliver faster power output and reduce wear on the bearings. If the Auto Restart feature is enabled, the system stores the ON command through a loss of utility power. However, the microturbine must be explicitly commanded ON for the Auto Restart operation to function; for example the system will not automatically restart and reconnect to the grid if the Time of Use mode is not telling the system to be ON at that point. Operator intervention is required to manually restart the system if a utility fault condition occurs and the related protective relay function shuts the microturbine down. The Auto Restart feature is available in both the Grid Connect and Stand Alone operating modes. However, each mode has a separate user settable delay timer that is adjustable between zero and 60 minutes. Grid Connect Operation Once the system has been properly wired to the utility grid and any external control wiring has been established, a Capstone Authorized Service Provider is required to complete the commissioning procedure and set protective relay settings. The end user can then refer to the C200 User Manual (400008) for proper operation and maintenance of the system. 410066 Rev C (June 2009) 4-2 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 C200 MICROTURBINE TECHNICAL REFERENCE
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