The centralized radio access cellular network infrastructure based on centralized Super Base Station(CSBS) is a promising solution to reduce the high construction cost and energy consumption of conventional cellular n...The centralized radio access cellular network infrastructure based on centralized Super Base Station(CSBS) is a promising solution to reduce the high construction cost and energy consumption of conventional cellular networks. With CSBS, the computing resource for communication protocol processing could be managed flexibly according the protocol load to improve the resource efficiency. Since the protocol load changes frequently and may exceed the capacity of processors, load balancing is needed. However, existing load balancing mechanisms used in data centers cannot satisfy the real-time requirement of the communication protocol processing. Therefore, a new computing resource adjustment scheme is proposed for communication protocol processing in the CSBS architecture. First of all, the main principles of protocol processing resource adjustment is concluded, followed by the analysis on the processing resource outage probability that the computing resource becomes inadequate for protocol processing as load changes. Following the adjustment principles, the proposed scheme is designed to reduce the processing resource outage probability based onthe optimized connected graph which is constructed by the approximate Kruskal algorithm. Simulation re-sults show that compared with the conventional load balancing mechanisms, the proposed scheme can reduce the occurrence number of inadequate processing resource and the additional resource consumption of adjustment greatly.展开更多
The site selection of converter stations for voltage source converter-based direct current(VSC-DC)interties can significantly impact their control performance,particularly when both grid-following control(GFL)and grid...The site selection of converter stations for voltage source converter-based direct current(VSC-DC)interties can significantly impact their control performance,particularly when both grid-following control(GFL)and grid-forming control(GFM)are configured.It is challenging to fully realise the maximum potential of both control modes at a single node within an urban power grid.This paper proposes a novel converter station site selection method to identify optimal connection points in urban grids,enabling efficient active power transfer while providing flexible active and reactive power support in inter-connected urban areas.First,a comprehensive index system is developed to quantitatively assess the impact of VSC-DC intertie converter station siting on urban grids under both GFL and GFM modes.The proposed method utilises voltage stability margins to quickly rank candidate nodes and combines Euclidean distance with grey relational analysis to determine the most advantageous locations.A case study demonstrates the effectiveness of the proposed approach.The results show that the novel site selection method ensures converter stations configured with both GFL and GFM are optimally sited,thereby maximising control performance,significantly enhancing power support capabilities,and improving resilience at the connected nodes.展开更多
基金supported in part by the National Science Foundationof China under Grant number 61431001the Beijing Talents Fund under Grant number 2015000021223ZK31
文摘The centralized radio access cellular network infrastructure based on centralized Super Base Station(CSBS) is a promising solution to reduce the high construction cost and energy consumption of conventional cellular networks. With CSBS, the computing resource for communication protocol processing could be managed flexibly according the protocol load to improve the resource efficiency. Since the protocol load changes frequently and may exceed the capacity of processors, load balancing is needed. However, existing load balancing mechanisms used in data centers cannot satisfy the real-time requirement of the communication protocol processing. Therefore, a new computing resource adjustment scheme is proposed for communication protocol processing in the CSBS architecture. First of all, the main principles of protocol processing resource adjustment is concluded, followed by the analysis on the processing resource outage probability that the computing resource becomes inadequate for protocol processing as load changes. Following the adjustment principles, the proposed scheme is designed to reduce the processing resource outage probability based onthe optimized connected graph which is constructed by the approximate Kruskal algorithm. Simulation re-sults show that compared with the conventional load balancing mechanisms, the proposed scheme can reduce the occurrence number of inadequate processing resource and the additional resource consumption of adjustment greatly.
基金National Natural Science Foundation of China,Grant/Award Number:52207119Young Elite Scientists Sponsorship Program by CAST,Grant/Award Number:2023QNRC001Shandong Provincial Natural Science Foundation,China,Grant/Award Number:ZR2024QE468。
文摘The site selection of converter stations for voltage source converter-based direct current(VSC-DC)interties can significantly impact their control performance,particularly when both grid-following control(GFL)and grid-forming control(GFM)are configured.It is challenging to fully realise the maximum potential of both control modes at a single node within an urban power grid.This paper proposes a novel converter station site selection method to identify optimal connection points in urban grids,enabling efficient active power transfer while providing flexible active and reactive power support in inter-connected urban areas.First,a comprehensive index system is developed to quantitatively assess the impact of VSC-DC intertie converter station siting on urban grids under both GFL and GFM modes.The proposed method utilises voltage stability margins to quickly rank candidate nodes and combines Euclidean distance with grey relational analysis to determine the most advantageous locations.A case study demonstrates the effectiveness of the proposed approach.The results show that the novel site selection method ensures converter stations configured with both GFL and GFM are optimally sited,thereby maximising control performance,significantly enhancing power support capabilities,and improving resilience at the connected nodes.
