摘要
针对当前无源配电网向有源配电网过渡,配电网网架结构发生变化,导致运行检修工作中作业安全风险显著增加,提出一种基于奥迪道克公式的中压有源配电网工作接地线的安全校核方法。将分布式电源分为旋转电机型和逆变型2类,考虑工作人员位于中压侧检修的情况。在此基础上,根据叠加定理计算因误动、装置等原因在工作接地线处产生的短路电流,利用奥迪道克公式初选取接地线截面积,通过计算单相、三相残压对其进行二次校核,最后根据实际拓扑提供可靠的接地措施。通过实际案例中的应用,验证该方法的可行性和有效性。
The transition from passive power distribution network to active power distribution leads to the change of network structure,which results in the significant increase of risk in operation and maintenance work.This paper proposes a verification method about the safety of grounding wire in medium-voltage active distribution network based on Ondendonks formula.Considering the situation that the staff in the medium voltage side for maintenance,the distributed generators are divided into two types,which are rotating machine-based generator and inverter-based generator.On this basis,the short-circuit current generated at the grounding device due to mis-operation and device reasons is calculated according to the superposition theorem.The cross-sectional area of the grounding device is selected by using the Ondendonks formula preliminarily,and then the secondary check is carried out by calculating the single-phase and three-phase residual voltage.Finally,reliable grounding measures can be obtained on the basis of the actual topology.The feasibility and effectiveness of this method are validated by the application in a practical case.
作者
黄伟达
李天友
刘松喜
黄超艺
陈宏
蔡维
HUANG Weida;LI Tianyou;LIU Songxi;HUANG Chaoyi;CHEN Hong;CAI Wei(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350001,China;Technology Center of Electric Power Research Institute,State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350001,China;School of Electrical Engineering and Automation,Xiamen University of Technology,Xiamen 361000,China;State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350001,China)
出处
《电力科学与技术学报》
CAS
北大核心
2022年第4期114-124,共11页
Journal of Electric Power Science And Technology
基金
国家电网有限公司总部科技项目(5213302000G1)。
关键词
有源配电网
运行检修
接地线
叠加定理
奥迪道克公式
active distribution network
operation and maintenance
grounding device
superposition theorem
Ondendonks formula
