In this study,the present situation and characteristics of power supply in remote areas are summarized.By studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the ap...In this study,the present situation and characteristics of power supply in remote areas are summarized.By studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the applicability of related technologies,such as grid-forming storage and power load management,is studied,including grid-connection technologies,such as grid-forming converters and power load management.On this basis,three power-supply modes were proposed.The application scenarios and advantages of the three modes were compared and analyzed.Based on the local development situation,the temporal sequences of the three schemes are described,and a case study was conducted.The study of the heavy-load power supply mode in remote areas contributes to solving the problem of heavy-load green power consumption in remote areas and promoting the further development of renewable energy.展开更多
The smart grid with flexible topologies receives intensive attention recently.Transmission switching(TS)alters the power system topology during operation,and has been demonstrated for the advantage of economic and sec...The smart grid with flexible topologies receives intensive attention recently.Transmission switching(TS)alters the power system topology during operation,and has been demonstrated for the advantage of economic and secure operation of power systems.TS includes a chain of sequential switching actions which bring disturbances to the system if the switching actions are not properly designed.Unfortunately,it is not considered or well-studied in existing works.In this paper,a new multi-period TS model that considers the transition security and a two-stage iterative method are proposed.In the TS model,we take into account the fact that only one line is permitted to switch up or down at a time and the security of each switching action is considered.The proposed iterative solution makes the TS model more tractable in ACframework.Case studies on a 6-bus system and the IEEE 57-bus test system have verified the effectiveness of theproposed model.Numerical results show that:àthe consideration of transition security of TS is essential;`the transition path is directly related to secure and fast the transmission switching;′the proposed model and solution method give an effective way to determine the switching sequence and switching timing under transition security criteria.展开更多
文摘In this study,the present situation and characteristics of power supply in remote areas are summarized.By studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the applicability of related technologies,such as grid-forming storage and power load management,is studied,including grid-connection technologies,such as grid-forming converters and power load management.On this basis,three power-supply modes were proposed.The application scenarios and advantages of the three modes were compared and analyzed.Based on the local development situation,the temporal sequences of the three schemes are described,and a case study was conducted.The study of the heavy-load power supply mode in remote areas contributes to solving the problem of heavy-load green power consumption in remote areas and promoting the further development of renewable energy.
基金supported by National Natural Science Foundation of China(No.U1766205)Science and Technology Foundation of SGCC "Research on Efficient Integration of Large Scale Long Distance Offshore Wind Farm and Its Key Technologies in Operation and Control".
文摘The smart grid with flexible topologies receives intensive attention recently.Transmission switching(TS)alters the power system topology during operation,and has been demonstrated for the advantage of economic and secure operation of power systems.TS includes a chain of sequential switching actions which bring disturbances to the system if the switching actions are not properly designed.Unfortunately,it is not considered or well-studied in existing works.In this paper,a new multi-period TS model that considers the transition security and a two-stage iterative method are proposed.In the TS model,we take into account the fact that only one line is permitted to switch up or down at a time and the security of each switching action is considered.The proposed iterative solution makes the TS model more tractable in ACframework.Case studies on a 6-bus system and the IEEE 57-bus test system have verified the effectiveness of theproposed model.Numerical results show that:àthe consideration of transition security of TS is essential;`the transition path is directly related to secure and fast the transmission switching;′the proposed model and solution method give an effective way to determine the switching sequence and switching timing under transition security criteria.
