关键词: 多播路由算法, 智能电网, 负载功率, 时延, DR（需求响应）能力

Abstract: In the multicast routing of smart grid, the delay constraint is usually considered, but power load is not be considered for multicast tree construction. Such multicast tree construction will cause that there is a large communication latency from the control center to the high power load devices in power grid. To address this multicast routing problem in smart grid, a multicast routing is presented in this paper. It introduces a multicast tree construction method considering both load power and communication delay, which is called multicast routing algorithm based on DR capability constraint. The presented algorithm constructs a lower cost multicast tree under the condition that the DR capability of the destination is constrained. The simulation results show that the presented algorithm can effectively construct the multicast tree satisfying the constraint condition. Compared with the multicast routing algorithm based on the delay constraint, it can reduce the communication latency from the control center to the high power load devices in power grid , which improve the reliability of demand response in smart grid.

Key words: multicast routing algorithm, smart grid, load power, delay, DR (demand response) capability