Modelling And Performance Analysis of A Wind/Diesel Hybrid Power System

Direct voltage control for stand-alone wind energy conversion systems with energy storage

“…But due to great varia-tion in wind speed which occurs from season to season, it can not be used as an autonomous source of generation. Hence, it is necessary to explore possibilities of combining a wind generator with the diesel generator in order to reduce the running cost per kWh and to increase the reliability of the power supply [6].…”

“…The rotor speed OJ, in equations (2)(3)(4)(5)(6)(7) and (2)(3)(4)(5)(6)(7)(8) usually is treated as a constant during the electrical transient. The electrical torque of the induction machine is given by…”

“…Where P is the number of the poles. Equations (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) shows the load voltages and currents in reference frame, assume of induetive load.…”

“…To construct a small-signal ac model at a quiescent operation point, assume that system currents and voltages are equal to some given steady state values I and V (quiescent operating point), (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) With the assumptions that the ac variations are small in magnitude compared to the steady values, then the equations can be simplified. This is done by substituting Eqs.…”

“…This is done by substituting Eqs. (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) into Eqs. (2)(3)(4)(5) and (2)(3)(4)(5)(6).…”