Voltage monitoring by linear programming based optimization

A two-level technique for power plant voltage monitoring and control is extended using linear-programming-based optimization. A five-bus system is considered, taking all branch and link flows into account. Bus 1 is assumed to be the slack bus, and initial load flow solutions are achieved by the Gauss-Seidel method using the Y bus with tolerances of 0.0001 per unit for both the real and the imaginary components of voltage. This is further modified by the Newton-Raphson method using the Y bus with tolerances of 0.01 per unit for the changes in the real and reactive bus powers. Results show that convergence is achieved within one iteration with considerable reduction in CPU time