[12] An AC-AC converter is used to obtain a variable AC output voltage Vo from a fixed AC source and a single-phase converter with a TRIAC.

[12] An AC-AC converter is used to obtain a variable AC output voltage Vo from a fixed AC source and a single-phase converter with a TRIAC. =========================================== a. True b. False ================================= OTA: please explain why it is true or false!

2 electrical power systems proplems

1. A three-phase line serves a 54MW load with a .9 lagging power factor... (SEE ATTACHMENT)

Power Systems Problem (3-Phase Fault; Matrices; Matrix Inversion)

For a 3-Phase fault at Bus 3, find {see attachment}, the post fault bus voltages for each bus, and the currents to all busses. Show your work, including the Y & Z matrices. Explain your method of matrix inversion. **Please see attachment for complete question and diagram

Power Systems (Nodal Equations; Y Bus Matrix; P&Q)

1. {see attachment see attachment for diagram and details} All reactances are on the System's Base. Write the Nodal Equations and the YBus Matrix. 2. {see attachment for diagram and details} Find P&Q delivered from the generator's terminals to the system

Power Systems (Real Value of Fault Current for 3-Phase Fault)

{See attachment for diagram and details} Both machines are rated at 50 MVA, 20 KV. The system base is the machines' base. Find the real value of the fault current for a 3-Phase fault atthe motor terminals.