基于智能电网的动态经济调度研究  

Research on Dynamic Economic Dispatch Based on Smart Grid

作　　者：李惠玲[1] 白晓民[1] 谭闻[1] 董伟杰[1] 栗楠[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2013年第6期1547-1554,共8页Power System Technology

摘　　要：智能电网中大规模电动汽车(plug-in hybrid electricvehicle,PHEV)和可再生能源(renewable energy resource,RES)发电的接入,使得电网由传统的自上而下的集中控制转变为分布式控制,潮流也从单一流动转变为双向流动,直接影响传统发电机组的功率输出。电动汽车能够向电网提供辅助服务(vehicle to grid,V2G),改变了传统经济调度单一的发电商利益模式。车主充电行为的随机性和可再生能源发电的间歇性也加大了对电网调节能力的要求。为此文章构建了基于智能电网的动态经济调度模型,该模型包含电动汽车和可再生能源发电,以发电成本(含电动汽车入网服务成本)和车主充电成本最低、环境污染最小和等效负荷率最高为优化目标,在满足用电需求的前提下,动态调节电动汽车充放电时间和功率,匹配负荷和可再生能源发电波动。最后以10机组系统为例对该模型进行了分析,证明了所提模型的合理性和有效性。Connecting large-scale plug-in hybrid electric vehicles （PHEVs） and renewable energy resources （RES） to smart grid makes the traditional top-down control mode of power grid turned into distributed control model, and the unidirectional power flow is turned into bidirectional power flow, so the power output of traditional generating units is directly impacted. PHEVs can provide ancillary services to the grid （vehicle to grid, V2G） that changes genco＇s single interest mode under traditional economic dispatching. The random charging behavior of PHEV owners and intermittence of renewable energy generation makes the demand on power grid regulation ability stronger. In this paper a smart grid based dynamic economic dispatching model is constructed, in which the PHEV and RES are contained and the minimization of power generation costs （including V2G service cost）, the lowest charging cost of PHEV owners, least air pollution, and maximization of synthetic load ratio are taken as objectives, and under the premise of meet the demand of power consumption the charging/discharging time and power of PHEV is dynamically regulated to match with the fluctuations of loads and renewable energy generation. Simulation results of a 10-generating unit system show that the proposed model is reasonable and effective.

关 键 词：智能电网 电动汽车 可再生能源 V2G 动态经济调度 

分 类 号：TM721[电气工程—电力系统及自动化]