Voltage Stability Analysis and Real Power Loss Reduction in Distributed Distribution System

The development of DGs will bring new changes to traditional power systems. Distributed generation has important consequences for the operation of the distribution networks. Appropriate size and location of distributed generation (DG) play a significant role in minimizing power losses in distribution systems. This paper represents techniques to minimize power losses and improves voltage stability in a distribution feeder by optimizing DG model in terms of size, location and operating point of DG through sensitivity analysis. The methods have been developed with considering load characteristics and representing loads with constant impedance and constant current models, separately. A DG injection into the distribution system improves the voltage profile with minimum loss. The proposed techniques have been tested on IEEE 37 bus distribution system and TNEB 11 KV distribution feeder.