A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A s...A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including LPP.For damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was proposed.The performance of the suggested controller was tested using a 16-machine 5-area network.The results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating conditions.The method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing LPP.Simulation results demonstrate that the model presented can be used in designing of essential controllers for LPP.展开更多
We have developed a uniform and dense epitaxial thinfilm of 0.94(Bi_(0.5)Na_(0.5))TiO_(3)-0.04×(Bi_(0.5)Na_(0.5))TiO_(3)-0.02BaTiO_(3)on a SrRuO_(3)coated SrTiO_(3)substrate by pulsed laser deposition method.The ...We have developed a uniform and dense epitaxial thinfilm of 0.94(Bi_(0.5)Na_(0.5))TiO_(3)-0.04×(Bi_(0.5)Na_(0.5))TiO_(3)-0.02BaTiO_(3)on a SrRuO_(3)coated SrTiO_(3)substrate by pulsed laser deposition method.The remnant polarization,coercivefield and dielectric constant of thefilm with thickness of 315 nm,were measured to be 16.6μC·cm^(-2),147.5 kV·cm^(-1)and 640(at 1 kHz),respectively.Thefilm exhibited a high breakdown voltage and low leakage current of 1.1×10^(-5)A·cm^(-2)at 310 kV·cm^(-1).This(Bi_(0.5)Na_(0.5))TiO_(3)-based thinfilm with a target composition in the rhombohedral side of the morphotropic phase boundary can be considered a potential candidate for relatively high power applications.展开更多
文摘A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including LPP.For damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was proposed.The performance of the suggested controller was tested using a 16-machine 5-area network.The results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating conditions.The method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing LPP.Simulation results demonstrate that the model presented can be used in designing of essential controllers for LPP.
基金The-nancial support of this work by the Glenn Howatt foundation is sincerely appreciated by the authors.
文摘We have developed a uniform and dense epitaxial thinfilm of 0.94(Bi_(0.5)Na_(0.5))TiO_(3)-0.04×(Bi_(0.5)Na_(0.5))TiO_(3)-0.02BaTiO_(3)on a SrRuO_(3)coated SrTiO_(3)substrate by pulsed laser deposition method.The remnant polarization,coercivefield and dielectric constant of thefilm with thickness of 315 nm,were measured to be 16.6μC·cm^(-2),147.5 kV·cm^(-1)and 640(at 1 kHz),respectively.Thefilm exhibited a high breakdown voltage and low leakage current of 1.1×10^(-5)A·cm^(-2)at 310 kV·cm^(-1).This(Bi_(0.5)Na_(0.5))TiO_(3)-based thinfilm with a target composition in the rhombohedral side of the morphotropic phase boundary can be considered a potential candidate for relatively high power applications.
