以电力系统为物理基础的电力市场运营受到物理规律与经济规律的双重制约,必须掌握电力市场与电力系统在不同时间尺度上的交互影响以保证其安全稳定。为此,基于电力市场与电力系统的动态交互仿真平台(dy-namic simulation platform for p...以电力系统为物理基础的电力市场运营受到物理规律与经济规律的双重制约,必须掌握电力市场与电力系统在不同时间尺度上的交互影响以保证其安全稳定。为此,基于电力市场与电力系统的动态交互仿真平台(dy-namic simulation platform for power markets&power systems,DSPMPS),通过对各参与者的市场行为与反映客观规律的数学模型之间的动态交互仿真,研究了参与者决策对电力市场与电力系统的短期和长期稳定性的影响、市场行为与输电动态阻塞的相互影响、输电阻塞对投资行为及监管行为的影响。这些初步应用反映了DSPMPS在决策支持与综合型人才培训中的重要作用。展开更多
除物理稳定性引起的输电阻塞外,电力市场和社会福利还受到一次能源、环保排放、技术支撑及多方博弈等因素的制约。这些影响市场竞争和效率的因素可统称为广义阻塞,它们共同约束着电力系统和电力市场的运行。其中,由减排约束造成的能源...除物理稳定性引起的输电阻塞外,电力市场和社会福利还受到一次能源、环保排放、技术支撑及多方博弈等因素的制约。这些影响市场竞争和效率的因素可统称为广义阻塞,它们共同约束着电力系统和电力市场的运行。其中,由减排约束造成的能源流不通畅可称为排放阻塞,受到了越来越多的关注。从机理、特性及时效等方面分析排放阻塞与输电动态阻塞的异同,并在电力市场与电力系统的动态交互仿真平台(dynamic simulation platform for power market&power system,DSPMPS)上深入研究其交互影响。仿真结果表明,排放阻塞和输电阻塞存在复杂的交互影响,应从全局观点出发优化广义阻塞的风险管理。在运营中,建议采用"按各自的机理,分别将各种阻塞风险分摊"的风险分摊方法,对2种阻塞进行综合管理。展开更多
For the integration network of a cellular network and a wireless local area network （WLAN）, a priority-based dynamic load transfer （PDLT） algorithm is proposed. The dynamic vertical handoffs by call admission cont...For the integration network of a cellular network and a wireless local area network （WLAN）, a priority-based dynamic load transfer （PDLT） algorithm is proposed. The dynamic vertical handoffs by call admission control are jointly determined by the network conditions and the traffic characteristics in combination with the location-condition of mobile terminals. When there is no bandwidth resource available in the cellular network or WLAN, the proposed PDLT algorithm allows an incoming voice call or data call within the overlapping area of the cellular network and the WLAN to be directed to the spare network; meanwhile, by dynamically computing the occupancy of the bandwidth resource, the proposed PDLT algorithm also allows an ongoing voice call or data communication to be transferred to the network with a sufficient bandwidth resource according to the given threshold to balance the number of voice/data calls in the two networks. The analysis results of a two-dimensional Markov model and the simulation results show that the PDLT algorithm can effectively enhance the whole integrated network＇ s traffic, reduce the blocking probability of new calls and increase the data throughput, and thus decrease the response time for various services.展开更多
文摘以电力系统为物理基础的电力市场运营受到物理规律与经济规律的双重制约,必须掌握电力市场与电力系统在不同时间尺度上的交互影响以保证其安全稳定。为此,基于电力市场与电力系统的动态交互仿真平台(dy-namic simulation platform for power markets&power systems,DSPMPS),通过对各参与者的市场行为与反映客观规律的数学模型之间的动态交互仿真,研究了参与者决策对电力市场与电力系统的短期和长期稳定性的影响、市场行为与输电动态阻塞的相互影响、输电阻塞对投资行为及监管行为的影响。这些初步应用反映了DSPMPS在决策支持与综合型人才培训中的重要作用。
文摘除物理稳定性引起的输电阻塞外,电力市场和社会福利还受到一次能源、环保排放、技术支撑及多方博弈等因素的制约。这些影响市场竞争和效率的因素可统称为广义阻塞,它们共同约束着电力系统和电力市场的运行。其中,由减排约束造成的能源流不通畅可称为排放阻塞,受到了越来越多的关注。从机理、特性及时效等方面分析排放阻塞与输电动态阻塞的异同,并在电力市场与电力系统的动态交互仿真平台(dynamic simulation platform for power market&power system,DSPMPS)上深入研究其交互影响。仿真结果表明,排放阻塞和输电阻塞存在复杂的交互影响,应从全局观点出发优化广义阻塞的风险管理。在运营中,建议采用"按各自的机理,分别将各种阻塞风险分摊"的风险分摊方法,对2种阻塞进行综合管理。
基金The National Science and Technology Major Project(No. 2011ZX03005-004-03 )the National Natural Science Foundation of China (No. 61171081 )the Research Fund of the National Mobile Communications Research Laboratory of Southeast University (No.2011A08)
文摘For the integration network of a cellular network and a wireless local area network （WLAN）, a priority-based dynamic load transfer （PDLT） algorithm is proposed. The dynamic vertical handoffs by call admission control are jointly determined by the network conditions and the traffic characteristics in combination with the location-condition of mobile terminals. When there is no bandwidth resource available in the cellular network or WLAN, the proposed PDLT algorithm allows an incoming voice call or data call within the overlapping area of the cellular network and the WLAN to be directed to the spare network; meanwhile, by dynamically computing the occupancy of the bandwidth resource, the proposed PDLT algorithm also allows an ongoing voice call or data communication to be transferred to the network with a sufficient bandwidth resource according to the given threshold to balance the number of voice/data calls in the two networks. The analysis results of a two-dimensional Markov model and the simulation results show that the PDLT algorithm can effectively enhance the whole integrated network＇ s traffic, reduce the blocking probability of new calls and increase the data throughput, and thus decrease the response time for various services.
