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 |
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代理人 |
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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 |