能源区块链(blockchain)技术为能源互联网提供了一个崭新的发展途径,受到广泛关注。区块链技术本质上是一个由集体维护的去中心化且公开透明的分布式数据库,具有可靠性、保密性高等特性,在有效解决能源交易双方间的信任问题上具有较好...能源区块链(blockchain)技术为能源互联网提供了一个崭新的发展途径,受到广泛关注。区块链技术本质上是一个由集体维护的去中心化且公开透明的分布式数据库,具有可靠性、保密性高等特性,在有效解决能源交易双方间的信任问题上具有较好前景。首先,该文对区块链技术的特征进行了分析;然后,结合虚拟电厂(virtual power plant,VPP)概念与区块链技术初步给出了微网能源区块链模型;最后,通过算例分析验证了引入区块链技术可以提升能源互联网中数据传递的不可篡改性和保密性。展开更多
为提高电网分析的准确性,调度中心采用的电网模型应从外网等值模型逐步过渡到全电网模型。通过BPA(bonneville power administration)电网模型与能量管理系统电网模型进行模型拼接可生成全电网模型,分析了模型拼接的难点、步骤。算例结...为提高电网分析的准确性,调度中心采用的电网模型应从外网等值模型逐步过渡到全电网模型。通过BPA(bonneville power administration)电网模型与能量管理系统电网模型进行模型拼接可生成全电网模型,分析了模型拼接的难点、步骤。算例结果表明应用全电网模型进行电网分析可提高计算精度。展开更多
New energy sources such as solar energy and hydrogen energy have been applied to the Unmanned Aerial Vehicle(UAV), which could be formed as the hybrid power sources due to the requirement of miniaturization, lightweig...New energy sources such as solar energy and hydrogen energy have been applied to the Unmanned Aerial Vehicle(UAV), which could be formed as the hybrid power sources due to the requirement of miniaturization, lightweight, and environmental protection issue for UAV. Hybrid electrical propulsion technology has been used in UAV and it further enforces this trend for the evolution to the Hybrid-Powered System(HPS). In order to realize long endurance flight mission and improve the energy efficiency of UAV, many researching works are focused on the Energy Management Strategy(EMS) of the HPS with digital simulation, ground demonstration platforms and a few flight tests for the UAV in recent years. energy management strategy, in which off-line or on-line control algorithms acted as the core part, could optimize dynamic electrical power distribution further and directly affect the efficiency and fuel economy of hybrid-powered system onboard.In order to give the guideline for this emerging technology for UAV, this paper presents a review of the topic highlighting energy optimal management strategies of UAV. The characteristics of typical new energy sources applied in UAV are summarized firstly, and then the classification and analysis of the architecture for hybrid power systems in UAV are presented. In the context of new energy sources and configuration of energy system, a comprehensive comparison and analysis for the state of art of EMS are presented, and the various levels of complexity and accuracy of EMS are considered in terms of real time, computational burden and optimization performance based on the optimal control and operational modes of UAV. Finally, the tendency and challenges of energy management strategy applied to the UAV have been forecasted.展开更多
文摘能源区块链(blockchain)技术为能源互联网提供了一个崭新的发展途径,受到广泛关注。区块链技术本质上是一个由集体维护的去中心化且公开透明的分布式数据库,具有可靠性、保密性高等特性,在有效解决能源交易双方间的信任问题上具有较好前景。首先,该文对区块链技术的特征进行了分析;然后,结合虚拟电厂(virtual power plant,VPP)概念与区块链技术初步给出了微网能源区块链模型;最后,通过算例分析验证了引入区块链技术可以提升能源互联网中数据传递的不可篡改性和保密性。
文摘为提高电网分析的准确性,调度中心采用的电网模型应从外网等值模型逐步过渡到全电网模型。通过BPA(bonneville power administration)电网模型与能量管理系统电网模型进行模型拼接可生成全电网模型,分析了模型拼接的难点、步骤。算例结果表明应用全电网模型进行电网分析可提高计算精度。
基金upported by the Open Innovative Fund of Xi’an Aisheng Technology Group Company of China (No. ASN-IF2015-0202)
文摘New energy sources such as solar energy and hydrogen energy have been applied to the Unmanned Aerial Vehicle(UAV), which could be formed as the hybrid power sources due to the requirement of miniaturization, lightweight, and environmental protection issue for UAV. Hybrid electrical propulsion technology has been used in UAV and it further enforces this trend for the evolution to the Hybrid-Powered System(HPS). In order to realize long endurance flight mission and improve the energy efficiency of UAV, many researching works are focused on the Energy Management Strategy(EMS) of the HPS with digital simulation, ground demonstration platforms and a few flight tests for the UAV in recent years. energy management strategy, in which off-line or on-line control algorithms acted as the core part, could optimize dynamic electrical power distribution further and directly affect the efficiency and fuel economy of hybrid-powered system onboard.In order to give the guideline for this emerging technology for UAV, this paper presents a review of the topic highlighting energy optimal management strategies of UAV. The characteristics of typical new energy sources applied in UAV are summarized firstly, and then the classification and analysis of the architecture for hybrid power systems in UAV are presented. In the context of new energy sources and configuration of energy system, a comprehensive comparison and analysis for the state of art of EMS are presented, and the various levels of complexity and accuracy of EMS are considered in terms of real time, computational burden and optimization performance based on the optimal control and operational modes of UAV. Finally, the tendency and challenges of energy management strategy applied to the UAV have been forecasted.
