It is our great pleasure to organize this special issue in Control Theory and Technology in honor of the 90th birthday of Professor Huashu Qin.She is one of the pioneers in control theory and applications in China,and...It is our great pleasure to organize this special issue in Control Theory and Technology in honor of the 90th birthday of Professor Huashu Qin.She is one of the pioneers in control theory and applications in China,and has made many truly outstanding contributions to the field including nonlinear dynamics and control,intelligent control,robotics and complex systems.It is no surprise that she was selected as a representative introduced significantly in“Women in Control”of IEEE Control Systems Magazine.展开更多
Due to its capability of solving decision-making problems involving multiple entities and objectives, as well as complex action sequences, game theory has been a basic mathematical tool of economists, politicians, and...Due to its capability of solving decision-making problems involving multiple entities and objectives, as well as complex action sequences, game theory has been a basic mathematical tool of economists, politicians, and sociologists for decades. It helps them understand how strategic interactions impact rational decisions of individual players in competitive and uncertain environment, if each player aims to get the best payoff. This situation is ubiquitous in engineering practices. This paper streamlines the foundations of engineering game theory, which uses concepts, theories and methodologies to guide the resolution of engineering design, operation, and control problems in a more canonical and systematic way. An overview of its application in smart grid technologies and power systems related topics is presented, and intriguing research directions are also envisioned.展开更多
Transmission blockage caused by structural defects of small hydropower distribution network and insufficient regulation flexibility,which has a certain coupling relationship in time series,is the main reason for water...Transmission blockage caused by structural defects of small hydropower distribution network and insufficient regulation flexibility,which has a certain coupling relationship in time series,is the main reason for water abandonment.Based on the characteristics of time-sharing multiplexing of energy storage system(ESS),utilizing the coupling relationship of water abandonment events and rationally configuring ESS can solve the problems of small hydropower transmission congestion and lack of regulatory flexibility.The causes of insufficient flexibility and transmission blockage resulting in water abandonment,and the coupling relationship with ESS are analyzed.A source-grid-storage collaborative planning model for small hydropower distribution network is established.The upper-level objective is to maximize on-site consumption of small hydropower and the profits of regional small hydropower investors.The lower-level objective is to minimize average voltage offset,the input of VAR compensation system(VCS)and the number of transformer tap changer operation.The YALMIP solver is used to solve the optimization problems.Taking the 90 MW small hydropower unit in a certain area as an example,collaborative planning and operation analysis is conducted.The results prove that the proposed method can improve the on-site consumption of small hydropower,increase the income of regional small hydropower investors,and can also increase the voltage quality of the distribution network.展开更多
An atmospheric pressure microwave plasma source （APMPS） that can generate a large volume of plasma at an atmospheric pressure has been developed at Tsinghua University. This paper presents the design of this APMPS, ...An atmospheric pressure microwave plasma source （APMPS） that can generate a large volume of plasma at an atmospheric pressure has been developed at Tsinghua University. This paper presents the design of this APMPS, the theoretical consideration of microwave plasma ignition and the simulation results, including the distributions of the electric field and power density inside the cavity as well as the accuracy of the simulation results. In addition, a method of producing an atmospheric pressure microwave plasma and some relevant observations of the plasma are also provided. It is expected that this research would be useful for further developing atmospheric pressure microwave plasma sources and expanding the scope of their applications.展开更多
We develop a new cavity with a mode similar to TE13 to produce microwave plasma, named APMPS Ⅱ, which is able to produce a mass of air plasma with diameter of around 6 cm, equipped with about 3 kW input power under o...We develop a new cavity with a mode similar to TE13 to produce microwave plasma, named APMPS Ⅱ, which is able to produce a mass of air plasma with diameter of around 6 cm, equipped with about 3 kW input power under one atmosphere. The plasma seems to be homogeneous without significant filamentous discharge as observed by common camera device. We present the theory of this cavity, show the distribution of electric field of several planes inside the cavity and give some experimental results.展开更多
文摘It is our great pleasure to organize this special issue in Control Theory and Technology in honor of the 90th birthday of Professor Huashu Qin.She is one of the pioneers in control theory and applications in China,and has made many truly outstanding contributions to the field including nonlinear dynamics and control,intelligent control,robotics and complex systems.It is no surprise that she was selected as a representative introduced significantly in“Women in Control”of IEEE Control Systems Magazine.
基金This work was supported by National Natural Science Foundation of China （No. 51621065）.
文摘Due to its capability of solving decision-making problems involving multiple entities and objectives, as well as complex action sequences, game theory has been a basic mathematical tool of economists, politicians, and sociologists for decades. It helps them understand how strategic interactions impact rational decisions of individual players in competitive and uncertain environment, if each player aims to get the best payoff. This situation is ubiquitous in engineering practices. This paper streamlines the foundations of engineering game theory, which uses concepts, theories and methodologies to guide the resolution of engineering design, operation, and control problems in a more canonical and systematic way. An overview of its application in smart grid technologies and power systems related topics is presented, and intriguing research directions are also envisioned.
基金supported by the General Program of the National Natural Science Foundation of China(No.62176146).
文摘Transmission blockage caused by structural defects of small hydropower distribution network and insufficient regulation flexibility,which has a certain coupling relationship in time series,is the main reason for water abandonment.Based on the characteristics of time-sharing multiplexing of energy storage system(ESS),utilizing the coupling relationship of water abandonment events and rationally configuring ESS can solve the problems of small hydropower transmission congestion and lack of regulatory flexibility.The causes of insufficient flexibility and transmission blockage resulting in water abandonment,and the coupling relationship with ESS are analyzed.A source-grid-storage collaborative planning model for small hydropower distribution network is established.The upper-level objective is to maximize on-site consumption of small hydropower and the profits of regional small hydropower investors.The lower-level objective is to minimize average voltage offset,the input of VAR compensation system(VCS)and the number of transformer tap changer operation.The YALMIP solver is used to solve the optimization problems.Taking the 90 MW small hydropower unit in a certain area as an example,collaborative planning and operation analysis is conducted.The results prove that the proposed method can improve the on-site consumption of small hydropower,increase the income of regional small hydropower investors,and can also increase the voltage quality of the distribution network.
基金National Natural Science Foundation of China(No.50477005)the Basic Research Foundation of Tsinghua University.China(No.JCpy2005053)
文摘An atmospheric pressure microwave plasma source （APMPS） that can generate a large volume of plasma at an atmospheric pressure has been developed at Tsinghua University. This paper presents the design of this APMPS, the theoretical consideration of microwave plasma ignition and the simulation results, including the distributions of the electric field and power density inside the cavity as well as the accuracy of the simulation results. In addition, a method of producing an atmospheric pressure microwave plasma and some relevant observations of the plasma are also provided. It is expected that this research would be useful for further developing atmospheric pressure microwave plasma sources and expanding the scope of their applications.
基金Supported by the National Natural Science Foundation of China and the Basic Research Foundation of Tsinghua University under Grant Nos 50477005 and JCpy2005053.
文摘We develop a new cavity with a mode similar to TE13 to produce microwave plasma, named APMPS Ⅱ, which is able to produce a mass of air plasma with diameter of around 6 cm, equipped with about 3 kW input power under one atmosphere. The plasma seems to be homogeneous without significant filamentous discharge as observed by common camera device. We present the theory of this cavity, show the distribution of electric field of several planes inside the cavity and give some experimental results.
