The line currents in amperes in phases a, b and c respectively are 500 +j150, 100 – j600 and – 300 + j600 referred to the same reference vector with phase sequence of abc. Find the symmetrical component of currents.

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The necessary equation to be solved during the load flow analysis using Fast-Decoupled method is given below:<br/>where B' and B'' are formed using the imaginary part of the bus admittance matrix, Ybus. If the system consists of 6 buses of which one of the bus is slack bus and 2 bues are voltage regulated buses, then then the matrix B' is of order ____and the matrix B'' is of order____, respectivity.<br/>∆P/|Vi| = - B'∆δ<br/>∆Q/|Vi| = - B''∆|V|

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