Static Security Analysis of Overhead Transmission Lines Based on the Thermal Stability Constraint
The increasingly serious energy shortage problem leads to higher power supply reliability requirements;therefore,it is imperative to greatly improve the transmission line capacity,and reduce the transmission cost.However,thermal stability constraint is an important factor for limiting overhead conductor load capacity.Based on analyzing the impact of ampacity changes on conductor temperature and sag,this paper formulates the state equations focused on conductor temperature calculation,and combined with the power flow calculation and sag calculation.Through the analysis of three-node power system,the short-term power flow control strategy based on the conductor temperature and sag is proposed.
power systemoverhead lineampacitythermal stabilityconductor temperature
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万方数据
维普
