electric grid problems 1. The precise time when voltage peaks at a power source compared to the precise time it peaks at a substation is an example of: a). A GPS time stamp b). A smart grid c). Phasor Measurement Units (PMUs) c). A synchro-phasor 2. A smart grid calculates phase angles at generation stations and substations using extremely accurate time stamps created from: a). PMUs b). Synchro-Phasors c). GPS satellites c). All of the above Solution ANS 1- It is an example of Phasor Measurement Units and Synchro Phasor both are same so answer is both option C and D ANS 2- It is created from GPS satellites.

1. Electric Power Transformers - Open and Short Circuit Tests B. Open and Short Circuit Tests: l.
Connect a 1-D transformer to a 120V power supply and leave the secondary side open as shown
in Fig 2(a). Record the exciting current (i.e, the current flowing through the transfomer under no
load) and active power delivered to the transfomer. Note that under no load, VpEp, since the
voltage drop across the series impedance is very small, hence can be neglected 2. 1. Connect the
primary side of the transformer to a variable AC power supply which nmust initially be set to
zero voltstcic the secondary side (see
Solution
what is the question???