发明名称 Method and System for Determining the Thermal Power Line Rating
摘要 Method for measuring the power line thermal rating or maximum allowable current rating of an overhead power line with respect to a suspended/anchored cable span (2), comprising at least the following steps of: monitoring a motion of at least one point P of said suspended/anchored cable span (2) over a time interval;monitoring actual line current I, in A, over said time interval;determining an actual sag of said suspended/anchored cable, as a variable of actual line current;measuring or determining the effective wind speed of said suspended/anchored cable span (2) over said time interval;determining a sag reserve DF, in m, for thermal rating, which is the distance between the actual sag and a maximum allowable sag;determining the rate of change, tan(α), in m/A2, of the actual sag versus the square of the line current for the effective wind speed; anddetermining the power line thermal rating of the overhead power line, or ampacity, linked to a corresponding safety clearance, at measured or determined effective wind speed, by adding the square of actual current I to the ratio of the sag reserve DF by the sag rate of change, tan(α), at the effective wind speed, and taking the square root of that addition, i.e.;Ampacity=I2+DFtan(α),;wherein ampacity is in amperes.
申请公布号 US2016178681(A1) 申请公布日期 2016.06.23
申请号 US201414579792 申请日期 2014.12.22
申请人 Université de Liège, Interface Entreprises - Université ;Ampacimon S.A. 发明人 Lilien Jean-Louis;Nguyen Huu-Minh;Godard Bertrand
分类号 G01R31/02;G01N25/00;G01R19/00 主分类号 G01R31/02
代理机构 代理人
主权项 1. Method for measuring the power line thermal rating or maximum allowable current rating of an overhead power line with respect to a suspended/anchored cable span (2), comprising at least the following steps of: monitoring a motion of at least one point P of said suspended/anchored cable span (2) over a time interval; monitoring actual line current I, in A, over said time interval; determining an actual sag of said suspended/anchored cable, as a variable of actual line current; measuring or determining the effective wind speed of said suspended/anchored cable span (2) over said time interval; determining a sag reserve DF, in m, for thermal rating, which is the distance between the actual sag and a maximum allowable sag; determining the rate of change, tan(α), in m/A2, of the actual sag versus the square of the line current for the effective wind speed; and determining the power line thermal rating of the overhead power line, or ampacity, linked to a corresponding safety clearance, at measured or determined effective wind speed, by adding the square of actual current I to the ratio of the sag reserve DF by the sag rate of change, tan(α), at the effective wind speed, and taking the square root of that addition, i.e.Ampacity=I2+DFtan(α), wherein ampacity is in amperes.
地址 Angleur BE