基于节点传输贡献量的省间联络线潮流近似计算  

Approximate calculation of inter-provincial tie-line power flow based on node transmission contribution

作　　者：王洪涛 邹斌[1] 张亮 WANG Hongtao;ZOU Bin;ZHANG Liang(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China;College of Information Mechanical and Electrical Engineering,Ningde Normal University,Ningde 352100,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200444 [2]宁德师范学院信息与机电工程学院,福建宁德352100

出　　处：《电力自动化设备》2020年第6期135-141,共7页Electric Power Automation Equipment

基　　金：福建省自然科学基金资助项目(2019J01845)。

摘　　要：提出以节点传输贡献量为量化指标的节点分类方法,提高了日前电力市场中省间联络线上有功功率的计算精度。以3机5节点的简单电网为例,详细说明了省级电网简化前后功率传输分布因子和注入转换系数的计算过程和步骤。以电网有向图为基础,搜索电源节点与负荷节点之间的可行路径,计算节点的传输贡献量,进而估计节点的注入转换系数,获得联络线潮流的近似值,并分析了以节点传输贡献量的均值为阈值对节点分类的优势。最后在IEEE 118节点系统中将所提方法、均值法和节点定性分类法分别应用于日前电力市场的省间联络线潮流计算,仿真和比较结果表明所提方法减小了注入转换系数均值的波动,与真实值相比,省间联络线潮流的平均绝对误差为0.49%,验证了所提方法的有效性。The node classification method with node transmission contribution as the quantitative index is proposed to improve the calculation accuracy of the inter-provincial tie-line active power in day-ahead elec⁃tricity market.A simple grid with 3-machine 5-bus is taken as an example to explain in detail the calcula⁃tion process and steps of power transfer distribution factor and injection conversion coefficient of injection shift key before and after the provincial power grid simplification.Based on the directed graph of grid,the feasible path between the power node and the load node is searched,the node transmission contribution is calculated,and then the injection shift key of node is estimated to obtain the approximate value of tie-line power flow,and the advantage of node classification by taking the mean value of node transmission contri⁃bution as the threshold value is analyzed.Finally,the proposed method,mean method and node qualitative classification method are applied to the inter-provincial tie-line power flow calculation separately in dayahead electricity market with IEEE 118-bus system.Simulative and comparison results show that the fluctuation of the mean value of injection shift key is reduced by the proposed method.Compared with the true value,the average absolute error of the inter-provincial tie-line power flow is 0.49%,which verifies the effectiveness of the proposed method.

关 键 词：功率传输分布因子 注入转换系数 节点传输贡献量 日前电力市场 联络线潮流 

分 类 号：TM744[电气工程—电力系统及自动化]