Power factory load flow sensitivity analysis of an induction motor load model

Power factory Load flow sensitivity is a method used to obtain certain relationship between dependent and independent variables using differential relationship among physical measure in systems. Voltage sensitivity analysis is based on the linearization of the system around the operational point resulting from a load flow calculation. Inappropriate load representation has been a major setback causing inaccurate simulation results of the dynamic load. Further, induction motor loads comprise of 60% power system loads whose understanding under various dynamics is crucial for system stability. Static loads are known to be imprecise in dynamic load simulation and therefore yield false information on the system stability. This paper presents a dynamic load model whose parameters are varied to investigate their effects on both active and reactive load dynamics. Load modeling using field measurement data from power quality meter of an industrial consumer and that of standard motor models are analyzed to assess their effects on sensitivity of the system stability. Load flow sensitivity is analyzed to perform a voltage sensitivity analysis based on the linearization of the system around the operational point that results from a load flow calculation. The efficiency of the system is estimated using the IEEE 9 bus system. The result indicates that load model parameters have different sensitivity values under voltage disturbance. The results acquired are thus acceptable and rational.