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Characteristic impedance, Z = √(L/C)
50 = √(L/20*10⁻¹²)
L = (50*50)*(20*10⁻¹²)
L = 50000*10⁻¹²
L = 50 nH
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When different types of consumers are charged at different uniform per unit rates, it is said to be Flat Rate Tariff.
In this type, the consumers are grouped into different classes.
Each class is charged at different uniform rate.
The capacity of reactor = 50 MVAr when it is operated at 415 kV.
Impedance of reactor = V2/MVAr = (415*415)2/50 = 3444.5 Ω
For 400 kV,
Reactive power observed = (400*400)/3444.5
= 46.45 MVAR
Or
VAr capacity of capacitor or reactor is proportional to V²
When neutral disconnected, lamps are in series connection,
So, for series connection current is same for both Lamp,
So, Resistance of 100 W Lamp is more compared to 150 W Lamp.
Hence after neutral connection disconnect 100 W Lamp is more brighter than the 150 W Lamp.
Simple logic of reactance diagram is that simplified equivalent circuit of power system in which the various components of power system are represented by their reactances.
The reactance diagram can be obtained from impedance diagram if all the resistive components are neglected.
Here,
Vt = 300 V
Rse = 0.03 Ω, Rsh = 30 Ω, Ra = 0.05 Ω
I_L = 50 A
Vsh = V + I_L*Rse = 300 + 50*0.03 = 301.5 V
Ish = Vsh/Rsh = 301.5/30 = 10.05 A
Ia = Ish + I_L = 60.05 A
Eg = Vt + I_L*Rse + IaRa
Eg = 300 + 50*0.03 + 60.05*0.05 = 304.5025 V