摘要
目前,在电网关口节点安装的各类功率和电能表,只能测量和统计进出线路上的总功率和总能量,缺乏分析电气源流间功率交互和能量分配关系的功能。此状况制约了电力成本核算与分摊工作的公正开展。该文在将节点比例共享定理由瞬时电流拓展应用至瞬时功率的基础上,推导出计算节点任意源–源间和流–流间瞬时功率交互穿越值,以及任意源–流间瞬时功率送受值的关系式;设计了数值和解析计算节点源流1个周期能量分配关系的方法,建立了反映节点所有源–源、流–流和源–流间能量交互与送受关系的电能分配矩阵。最后,通过算例,比较了该文方法与其他方法的差异。所提方法将对开发新型节点关口智能电表、为进行关口能量与成本核算提供理论支撑。
To date, all kinds of power meters and watt-hour meters installed at electrical node gateways can only measure and count the total power and total energy of each line entering or leaving a node. These meters cannot obtain the information regarding the power interaction and energy distribution between electrical sources and flows. This situation may hinder the fair accounting and allocation of cost for energy usage. This paper extended the node proportional sharing theorem for instantaneous current to the application of instantaneous power. The formulas for calculating instantaneous power interaction or crossing between any two sources and between any two flows, and the instantaneous power transmitting and accepting between any one pair of sources and flows were first derived. Then, numerical and analytical methods for calculating the energy distribution relationship of nodal sources and flows in one cycle were proposed, and the corresponding energy distribution matrices were also designed to signify the acceptance relationship among all source-source pairs and flow-flow pairs and source-flow pairs of the same node. Finally, the results of energy distribution matrices of an example for energy supply of a node were provided and we also compared these results with other existing methods. The study of this paper shows the proposed method will provide theoretical support for the development of a new type of smart meter or for energy and cost accounting at the node gateway.
作者
于继来
张婷
盛玉和
张伟
王松岩
郭钰锋
YU Jilai;ZHANG Ting;SHENG Yuhe;ZHANG Wei;WANG Songyan;GUO Yufeng(School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China;State Grid Heilongjiang Electric Power Company Limited,Harbin 150030,Heilongjiang Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2021年第5期1618-1626,共9页
Proceedings of the CSEE
基金
国家电网公司科技项目(SGTYHT/18-JS-206)。
关键词
电气节点
源流
瞬时值
能量分配
能量穿越
比例共享
electrical node
source-flow
instantaneous value
energy distribution
energy crossing
proportional sharing
