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
in China, children witness has not been articled in three procedural laws, some scholar do not think that either children nor other person with no legal capacity should have witness qualification.in fact, although som...in China, children witness has not been articled in three procedural laws, some scholar do not think that either children nor other person with no legal capacity should have witness qualification.in fact, although some other countries do not admit the qualification of children witnesses under certain age,they do not take it as the factor to measure whether a witness has qualification or not.It is the judge who can decide whether a witness has qualification or not.Based on the these foreign counlries＇ s experience,we should not limit the qualification of children witnesses in the legislation. However, for the particularity of children＇s cognitive ability,we should embody this particularity when we judge children＇s testimony and protect children witnesses.展开更多
In China, children witness has not been articled in three procedural laws, some scholar do not think that either children nor other person with no legal capacity should have witness qualification.In fact, although som...In China, children witness has not been articled in three procedural laws, some scholar do not think that either children nor other person with no legal capacity should have witness qualification.In fact, although some other countries do not admit the qualification of children witnesses under certain age, they do not take it as the factor to measure whether a witness has qualification or not. It is the judge who can decide whether a witness has qualification or not. Based on the these foreign countries＇s experience, we should not limit the qualification of children witnesses in the legislation. However, for the particularity of children＇s cognitive ability, we should embody this particularity when we judge children＇s testimony and protect children witnesses.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.
文摘in China, children witness has not been articled in three procedural laws, some scholar do not think that either children nor other person with no legal capacity should have witness qualification.in fact, although some other countries do not admit the qualification of children witnesses under certain age,they do not take it as the factor to measure whether a witness has qualification or not.It is the judge who can decide whether a witness has qualification or not.Based on the these foreign counlries＇ s experience,we should not limit the qualification of children witnesses in the legislation. However, for the particularity of children＇s cognitive ability,we should embody this particularity when we judge children＇s testimony and protect children witnesses.
文摘In China, children witness has not been articled in three procedural laws, some scholar do not think that either children nor other person with no legal capacity should have witness qualification.In fact, although some other countries do not admit the qualification of children witnesses under certain age, they do not take it as the factor to measure whether a witness has qualification or not. It is the judge who can decide whether a witness has qualification or not. Based on the these foreign countries＇s experience, we should not limit the qualification of children witnesses in the legislation. However, for the particularity of children＇s cognitive ability, we should embody this particularity when we judge children＇s testimony and protect children witnesses.
