Power loss reduction in electrical network using optimized location and size of multi distributed generators

The location of distributed generators (DG) with different size on the power distribution systems could modify the voltage profile and impacts the level of real power losses. Faster optimization technique as well as a high computational speed of load flow are therefore required. This paper presents a linear model and an algorithm that allow to calculate the real power losses of the system. This methodology is based on the graph theory for representing the electrical network and generate the incident matrix. The Interior Point (IP) method is chosen as a local optimization method to solve problems of large-scale nonlinearity of power grid flows. The proposed approach obtains the optimal location and size of the DG units for each bus system with an important saving computational time and it has been tested with three standard IEEE bus. The results demonstrate the capability of the proposed method to reduce the active power losses with an advantageous time saving comparing to nonlinear approach based on Newton Raphson method.