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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Advanced Power Server (APS): User’s Manual Start Dispatch Dispatch Sequence Settings The Start Dispatch settings control how the MicroTurbines within the group are started once the group has received a start command. There are two options that determine how the MicroTurbines within a group are started, Priority mode and Run Time Balance mode. The “Power Dispatch” Dispatch Sequence Settings described later have an impact on whether the Start Dispatch settings are active or not. Priority mode or Run Time Balance mode will only be active when the “Max Efficiency Power Dispatch” Dispatch mode is selected. Care should be taken to always select either Priority or Run Time Balance when in the max efficiency mode of operation as it is not possible to turn them both off even if neither item has a check mark next to it in the dispatch sequence. When the Priority mode is selected, the MicroTurbines are started based on a pre-defined set of criteria that is outlined in Table 8, by priority order where the lower number represents a higher priority for starting the turbines. This will typically create a repeatable pattern of starting of MicroTurbines within a group. Priority Level Description 1 2 Table 8. Priority Mode Start Criteria Units that have been manually forced “on” by the user (already running and cannot be turned off). All things being similar, turbine capacity and turbine’s current run status, then the units with the lower assigned turbine number are higher rated and started first. The other available mode for determining which turbines to start within a group is Run Time Balance mode. Using this mode, the turbines are continually cycled by starting a new unit and turning off a running unit to maintain the similar operating hours on the turbines within a group. Setup of this turbine-starting mode can be adjusted using the two input textboxes as shown in Figure 19 and defined below. • Start Operating Hours Delta: This setting determines the power level between the running MicroTurbine with the highest operating hours and the non-running MicroTurbine with least operating hours that will cause the high time running unit to be turned off and the low time non-running unit to be turned on. This allows you to adjust the cyclic nature of the group of turbines. • Minimum Run Time (Hours): This setting determines the minimum time a MicroTurbine that was recently turned on will run before it is allowed to be available to be turned off. This is irrespective of the Start Operating Hours Delta setting which means that the unit will not be turned off to balance out the operating hours of the group until this time expires. This input will keep units from being rapidly turned on and then off due to other external events. 400011 Rev A (June 2007) Page 31 of 67 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 | ADVANCED POWER SERVER (APS) USER’S MANUAL
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