Matching of pv power systems with electrical loads using graph theoretic modeling approach

Abstract EN

The quality of load matching in a photovoltaic power system (PVPS) determines the system performance and the degree or the solar cells utilization.

In a good matched system, the operation of the load–line is close to the maximum power–line of the solar cell (SCA) generator.

This paper applies a comprehensive study of applying the Graph Theoretic Modeling (GTM) Approach to a directly connected SCA generator to supply different load type.

The load may be constant, ventilator or centrifugal pump.

Whereas, the used dc motor may be series, separately excited or shunt motor.

The system components are modeling using GTM approach to generate a nonlinear system of equations called Newton- Raphson Mixed Nodal Tableau (NR-MNT).

The equations are then solved numerically by developing a computer program written in MATLAB 6.

A comparison between the different case studies is achieved based on the quality of load matching for each case.