采用多指标非线性控制方法对电池储能系统(Battery Energy Storage System,BESS)与汽轮发电机的励磁进行协调控制设计。相比于其他的灵活交流输电系统(Flexible Alternating Current Transmission System,FACTS)器件,BESS的优点在于能...采用多指标非线性控制方法对电池储能系统(Battery Energy Storage System,BESS)与汽轮发电机的励磁进行协调控制设计。相比于其他的灵活交流输电系统(Flexible Alternating Current Transmission System,FACTS)器件,BESS的优点在于能够同时对电力系统的有功和无功功率进行快速且有效的控制。设计表明采用多指标非线性控制设计方法能很好地解决高维MIMO非线性系统的控制设计问题。仿真结果表明所设计的控制规律能明显地改善系统各状态量的动态特性,并有效地提高系统的稳定运行能力。展开更多
Estimation of support pressure is extremely important to the support system design and the construction safety of tunnels.At present,there are many methods for the estimation of support pressure based on different roc...Estimation of support pressure is extremely important to the support system design and the construction safety of tunnels.At present,there are many methods for the estimation of support pressure based on different rock mass classification systems,such as Q system,GSI system and RMR system.However,various rock mass classification systems are based on different tunnel geologic conditions in various regions.Therefore,each rock mass classification system has a certain regionality.In China,the BQ-Inex(BQ system)has been widely used in the field of rock engineering ever since its development.Unfortunately,there is still no estimation method of support pressure with BQ-index as parameters.Based on the field test data from 54 tunnels in China,a new empirical method considering BQ-Inex,tunnel span and rock weight is proposed to estimate the support pressure using multiple nonlinear regression analysis methods.And then the significance and necessity of support pressure estimation method for the safety of tunnel construction in China is explained through the comparison and analysis with the existing internationally widely used support pressure estimation methods of RMR system,Q system and GSI system.Finally,the empirical method of estimating the support pressure based on BQ-index was applied to designing the support system in the China’s high-speed railway tunnel—Zhengwan high-speed railway and the rationality of this method has been verified through the data of field test.展开更多
基金国家自然科学基金项目(50747026)广西科学基金项目(0728027)+5 种基金广西研究生教育创新计划资助项目(GXU11T32516GXU11T32598)Project Supported by National Natural Science Foundation of China(50747026)Guangxi Natural Science Foundation(0728027)Innovation Project of Guangxi Graduate Education(GXU11T32516GXU11T32598)
文摘采用多指标非线性控制方法对电池储能系统(Battery Energy Storage System,BESS)与汽轮发电机的励磁进行协调控制设计。相比于其他的灵活交流输电系统(Flexible Alternating Current Transmission System,FACTS)器件,BESS的优点在于能够同时对电力系统的有功和无功功率进行快速且有效的控制。设计表明采用多指标非线性控制设计方法能很好地解决高维MIMO非线性系统的控制设计问题。仿真结果表明所设计的控制规律能明显地改善系统各状态量的动态特性,并有效地提高系统的稳定运行能力。
基金Projects(51878567,51878568,51578458)supported by the National Natural Science Foundation of ChinaProjects(2017G007-F,2017G007-H)supported by China Railway Science and Technology Research and Development Plan。
文摘Estimation of support pressure is extremely important to the support system design and the construction safety of tunnels.At present,there are many methods for the estimation of support pressure based on different rock mass classification systems,such as Q system,GSI system and RMR system.However,various rock mass classification systems are based on different tunnel geologic conditions in various regions.Therefore,each rock mass classification system has a certain regionality.In China,the BQ-Inex(BQ system)has been widely used in the field of rock engineering ever since its development.Unfortunately,there is still no estimation method of support pressure with BQ-index as parameters.Based on the field test data from 54 tunnels in China,a new empirical method considering BQ-Inex,tunnel span and rock weight is proposed to estimate the support pressure using multiple nonlinear regression analysis methods.And then the significance and necessity of support pressure estimation method for the safety of tunnel construction in China is explained through the comparison and analysis with the existing internationally widely used support pressure estimation methods of RMR system,Q system and GSI system.Finally,the empirical method of estimating the support pressure based on BQ-index was applied to designing the support system in the China’s high-speed railway tunnel—Zhengwan high-speed railway and the rationality of this method has been verified through the data of field test.