The bus admittance matrix of the network shown in the given

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The bus admittance matrix of the network shown in the given figure, for which the marked parameters are per unit impedance, is

1. 0.3 -0.2 ^-1
  -0.2 0.2
2. 0.3 0.2
  0.2 0.2
3. 0.3 -0.2
  -0.2 0.2
4. 15 -5
  -5 5

Correct Option: D

y_jj = sum of all the admittance connected to node j
y_jk = negative of the admittance between nodes, j and k.
Figures are the admittance value
∴ y₁₁ = 10 + 5 = 15; y₂₂ = 5,
y₁₂ = y₂₁ = – 5;

∴ y_BMS =		15		-5
		-5		5

	0.3		-0.2		^-1
	-0.2		0.2

	0.3		0.2
	0.2		0.2

	0.3		-0.2
	-0.2		0.2