* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Product Life Cycle Report:
Ground (electricity) wikipedia , lookup
Control system wikipedia , lookup
Electric power system wikipedia , lookup
Electrical ballast wikipedia , lookup
Current source wikipedia , lookup
Audio power wikipedia , lookup
Transformer wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Power engineering wikipedia , lookup
Schmitt trigger wikipedia , lookup
Integrating ADC wikipedia , lookup
Amtrak's 25 Hz traction power system wikipedia , lookup
Power MOSFET wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Pulse-width modulation wikipedia , lookup
Electrical substation wikipedia , lookup
History of electric power transmission wikipedia , lookup
Stray voltage wikipedia , lookup
Transformer types wikipedia , lookup
Surge protector wikipedia , lookup
Voltage regulator wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Distribution management system wikipedia , lookup
Three-phase electric power wikipedia , lookup
Alternating current wikipedia , lookup
Opto-isolator wikipedia , lookup
Voltage optimisation wikipedia , lookup
Buck converter wikipedia , lookup
Solar micro-inverter wikipedia , lookup
Mains electricity wikipedia , lookup
Product Life Cycle Report: 1. Introduction 1.1 Hardware Components and General Interface Design In order to transfer power from the Avista fuel cell to the analog model power system, this interface design uses four main components, not including the fuel cell. The DC to DC converter regulates and steps up the DC output voltage from the fuel cell. This regulated voltage is fed through a power inverter to create a three phase AC signal at 60Hz. This three phase signal, which contains third harmonics from the switching of the inverter, is filtered by a delta to wye transformer. This transformer also steps up the AC voltage to an appropriate magnitude, matched with the AMPS voltage. The fourth component in the interface design is the zero detection circuitry. This circuitry is used to determine the positions and timings of the three voltage phases on the AMPS. 1.2 Power Flow Control The DSP used to operate and control the power inverter has been programmed to accept signals from the zero-detection circuitry. The DSP uses these signals to adjust the voltage phase such that the signal from the inverter can be synchronized with the voltage signals on the AMPS. Once synchronized, the phase angle is adjusted to control the power flow from the fuel cell to the AMPS, completing the interface process. 2. Design 2.1 Choosing the Appropriate Hardware Components The fuel cell used in this design is capable of reliably providing 100 Watts of power. In order to provide a certain level of device safety and upgradeability, the DC to DC converter and AC inverter were chosen to be able to transfer 200 Watts. This also ensures that the current ratings on the devices won’t be exceeded due to reactive power transferred through the interface due to differing voltage magnitudes at the output of the transformer and the AMPS. The transformer, obtained from the UI ECE department, is rated at 8.5kVA and was chosen because of its availability in the lab. The zero-detection circuitry was built from scratch to meet this system’s unique specifications. It utilizes a series of logic gates to output a series of pulses that can be interpreted by the DSP to determine the inverter switching timing. 2.2 Software Programming and System Control In order to reprogram the DSP to adjust the inverter output voltage and phase, it had to be reprogrammed. The reprogramming process involved analyzing the current programming, modifying it to adjust the voltage magnitude, and adding additional code to accept the input from the zero-detection circuitry. The software used to accomplish this task was the ***TI-blah.*** 2.3 Hardware and Software Costs Once appropriate components were chosen for this design, the DC to DC converter, the inverter, and the components used to create the zero-detection circuitry were all purchased with funding from the ECE Department and the ***GRANT***. The software and J-tag emulator used to program the DSP were donated by TI. The transformer and inductor bank are on loan from the ECE department, and will serve as removable, standalone devices that will be easy to connect and disconnect. These items were provided at no cost.