Development of a linearized photovoltaic generator model for simulation studies with electromagnetic transient programs

作者：Theocharis Andreas D^*; Pyrgioti Eleftheria C

来源：International Transactions on Electrical Energy Systems, 2015, 25(3): 454-470.

DOI：10.1002/etep.1853

• electromagnetic transients programs
• linearization
• nonlinear circuits
• photovoltaic generators
• photovoltaic power systems
• transients

In this paper, a linearized equivalent electrical circuit of a photovoltaic generator is developed. The proposed model is based on nonlinear and well-tested current-voltage equations which are however used in an alternative mathematical manner. The application of a linearization process, which differs from the well-known piecewise linear scheme and is based on Taylor's series approximation, leads to uncoupling of the current and voltage quantities in each time step of a digital simulation. Using the proposed equivalent photovoltaic generator circuit, the application of nodal analysis on equivalent resistive circuits derives a photovoltaic system model of linear algebraic equations. This remarkably simplifies photovoltaic systems modeling because one can develop a photovoltaic generator element in electromagnetic transient programs for power systems analysis, of great value to power engineers who are involved in photovoltaic systems modeling.

• 出版日期2015-3