Q2.A zero mean random signal is uniformly distributed between limits –a and +a and its mean square value is equal to its variance. Then the r.m.s value of the signal is
Q3.The direct axis and quadrature axis reactance’s of a salient pole alternator are 1.2p.u and 1.0p.u respectively. The armature resistance is negligible. If this alternator is delivering rated kVA at upf and at rated voltage then its power angle is
Q7.The response h(t) of a linear time invariant system to an impulse δ(t) , under
initially relaxed condition is The response of this system for a
unit step input u(t) is
A solar energy installation utilize a three – phase bridge converter to feed energy into power system through a transformer of 400V/400 V, as shown below.
The energy is collected in a bank of 400 V battery and is connected to converter
through a large filter choke of resistance 10Ω.