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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Advanced Power Server (APS) Table 6. APS Operating Features Vs. Control Modes Operating Features and Settings Operational Modes Load Balancing Maximum Efficiency Power Setpoint Utility Connection Start Dispatch Run Time Balancing Electrical Load Following Thermal Load Following Dual Mode Manual Start & Power Override Table 6 Notes: Grid Connect & Stand Alone No No Yes Yes(1) Yes Yes(3) Grid Connect & Stand Alone Yes Yes Yes Yes(1) Yes Yes(3) Grid Connect No No Yes Yes(1) Yes(2) Yes(3) (1) Only available with turbines that are ICHP units. ICHP units automatically switch to electrical load following with thermal tracking when in Stand Alone operation. (2) Power Setpoint mode will only work in Grid Connect mode and cannot be chosen as the Stand Alone control mode when the system is not connected to the utility. (3) Power Override functionality only available during Grid Connect operation. 5.2.6. Manual Start and Power Override With any individual turbine, the user can manually start/stop and/or manually set the power demand for the unit. Note that manually overriding power demand can only be done in Grid Connect operation. This can be done while still allowing the currently operating control mode to function, which can be very helpful in troubleshooting facility issues. Be careful to not take too many units away from the controller when operating in an automated control mode as this may result in unexpected performance of the controller and system as a whole. 5.2.7. ICHP Thermal Load Following The APS acts as a master for each group, and C65 ICHP units can be set up under each group to operate in electric priority or thermal priority modes. The APS provides additional flexibility when setting up thermal recovery systems compared to MultiPac systems where a turbine is the master. Refer to the C65 ICHP Application Guide (480014) for additional information about how to set up thermal recovery systems. 5.2.7.1 Electric Priority with Thermal Tracking For electric priority mode, the APS provides the electric load following logic and controls the power output of each turbine accordingly. The thermal output of each ICHP turbine’s heat recovery module is determined by the position of its exhaust diverter valve, which is controlled by temperature measurements and temperature setpoints. These temperature measurements and setpoints can be done individually at each turbine (local), or as a group through the APS. Measurements and setpoints are independent, and can be set for either APS or local turbine operation. For example, the temperature setpoint can be controlled by a value set in the APS, while the actual measured temperatures can come from each turbine. 410079 Rev. C (December 2013) Page 43 of 143 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 | Technical Reference Advanced Power Server (APS)
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