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CHAPTER 3 Capstone SYSTEM DESCRIPTION Load Controller The C200 Load Controller is one of the primary digital controllers and is responsible for converting power from the high power DC bus to the customer’s desired AC output voltage and frequency or in the reverse direction in order to start the engine. In the case of a Grid Connect system, the Load Controller automatically matches the existing voltage and frequency of the customer’s grid. Generator Controller The C200 Generator Controller is dedicated to fully active speed control of the permanent magnet AC generator/motor. This controller provides high frequency AC power to initially spin the engine up to the desired starting speed by flowing power from the DC bus. Once the system lights off, it controls the speed of the engine ensuring that the system remains at the speed to which it was commanded in order to generate power. Then Generator Controller then transfers that power to the DC bus. This controller also has control of the safety valve that opens and dumps compressed air overboard in the event of a loss of speed control, and a brake resistor that can be used to control excess power on the DC bus. Engine Controller The C200 Engine Controller is responsible for regulating fuel, the igniter, and all engine sensors. It initiates the lighting sequence of the engine and then controls the operating temperature with the flow of fuel once ignition is detected. Controlling of the fuel also includes control of the flow to the six individual fuel injectors. Battery Controllers The C200 has two identical Battery Controllers that convert the battery DC bus voltage from two large DC batteries to the system high power DC bus voltage. These controllers are responsible for the sourcing or sinking of power as necessary to regulate the DC bus. These controllers are only found on Stand Alone systems as the inverter regulates the DC bus on grid connect systems using grid power. During a start on a Stand Alone system, the Battery Controllers are responsible for turning on and charging the system’s high power DC bus. They also have built in battery health and monitoring software to manage the charge of the system’s batteries. System Controller The C200 System Controller is responsible for management of the entire microturbine operation and the interfacing to the outside world. It commands the individual controllers to the correct operation states and operation settings at the proper time to regulate the entire system. It takes manual commands from the user through the Display Panel, digital commands over the RS-232 communication bus (using the Capstone Remote Monitoring System (CRMS) software) from a computer or from a MODBUS converter, MultiPac communication from another turbine, Advanced Power Server, or direct discrete analog or digital inputs. This controller logs all system faults and records data prior to, during, and after all logged faults for the last 20 faults on record. As an additional safety feature, it has control of all low voltage DC power to the fuel valves and will disable the fuel system, independent of the Engine Controller, in the event of a fault. 410066 Rev C (June 2009) 3-5 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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