Title :
Phillips-Heffron model for a PV-DG Grid connected system
Author :
Mishra, Shivakant ; Ramasubramanian, D.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Delhi, New Delhi, India
Abstract :
In this paper, a Phillips-Heffron model for a Photovoltaic (PV)-Diesel Generator (DG) grid connected system has been developed. The linearisation of the system has been carried out about a fixed operating point obtained by performing a load flow analysis on the system. A second order sliding mode controller has been used to control the Voltage Source Converter (VSC) of the PV array. The Automatic Voltage Regulator (AVR) enabled DG provides the reactive support thereby bringing about a decrease in the rating of the VSC. The system stability has been evaluated by computing the eigen values obtained from the state matrix. A method of improving the system stability has also been proposed by operating the PV array in a variable power mode. The results have been obtained using MATLAB R®.
Keywords :
diesel-electric generators; eigenvalues and eigenfunctions; linearisation techniques; load flow control; photovoltaic power systems; power convertors; power generation control; power grids; power system stability; variable structure systems; voltage control; voltage regulators; AVR; MATLAB; PV array; PV-DG grid connected system; Phillips-Heffron Model; VSC; automatic voltage regulator; eigenvalue; linearisation system; load flow analysis; photovoltaic-diesel generator grid connected system; second order sliding mode controller; system stability evaluation; variable power mode; voltage source converter; Arrays; Converters; Equations; Mathematical model; Power system stability; Stability analysis; Voltage control; Eigen values; Phillips-Heffron; sliding mode control; stability;
Conference_Titel :
Power and Energy Society General Meeting (PES), 2013 IEEE
Conference_Location :
Vancouver, BC
DOI :
10.1109/PESMG.2013.6672909
