Roof greening is crucial for improving urban eco-environment, showing benefits, ecological y or social y, but it is so hard for investors in terms of capitals or promotion. The research introduced sponge-type composit...Roof greening is crucial for improving urban eco-environment, showing benefits, ecological y or social y, but it is so hard for investors in terms of capitals or promotion. The research introduced sponge-type composite vegetation carpet techniques and constructionprocess, making a breakthrough in greening form and having formulated a new one.展开更多
基于T型三电平拓扑的变流器结合了传统两电平和三电平变流器的优点,可以改善并提高系统的输出特性和运行效率,有效降低功率开关管的电压应力和导通损耗。超导磁储能（superconducting magnetic energy storage,SMES）系统拥有很高的功...基于T型三电平拓扑的变流器结合了传统两电平和三电平变流器的优点,可以改善并提高系统的输出特性和运行效率,有效降低功率开关管的电压应力和导通损耗。超导磁储能（superconducting magnetic energy storage,SMES）系统拥有很高的功率密度,作为新型储能装置应用于电力系统是未来的必然趋势。提出了一种基于T型三电平变流器的新型SMES拓扑结构,针对其运行过程中的非线性特性进行了端口受控哈密尔顿建模,并设计了SMES基于反馈互联结构的能量成型控制策略。仿真结果表明,基于能量成型控制及T型三电平拓扑的SMES具有较小的谐波畸变率和很好的功率跟踪性能。将其应用在风力发电系统中,有效平抑了风电波动,增强了风电场的并网能力。展开更多
基金Supported by Guangdong Province Soft Science Research Program(2014B090903015)Guangdong Province Science&Technology Cooperation Program([2015]162)~~
文摘Roof greening is crucial for improving urban eco-environment, showing benefits, ecological y or social y, but it is so hard for investors in terms of capitals or promotion. The research introduced sponge-type composite vegetation carpet techniques and constructionprocess, making a breakthrough in greening form and having formulated a new one.
文摘基于T型三电平拓扑的变流器结合了传统两电平和三电平变流器的优点,可以改善并提高系统的输出特性和运行效率,有效降低功率开关管的电压应力和导通损耗。超导磁储能（superconducting magnetic energy storage,SMES）系统拥有很高的功率密度,作为新型储能装置应用于电力系统是未来的必然趋势。提出了一种基于T型三电平变流器的新型SMES拓扑结构,针对其运行过程中的非线性特性进行了端口受控哈密尔顿建模,并设计了SMES基于反馈互联结构的能量成型控制策略。仿真结果表明,基于能量成型控制及T型三电平拓扑的SMES具有较小的谐波畸变率和很好的功率跟踪性能。将其应用在风力发电系统中,有效平抑了风电波动,增强了风电场的并网能力。
