By Francisco de León, Patrick St-Roch and Christian Beauregard, CYME International T&D
The Cable Historical Operating Temperature Estimator (CHOTE) is an innovative way to evaluate the temperature at which underground cable systems have operated during their in-service life. Engineers need answers to the following questions:
- Which cables have exceeded their normal operating temperature and for how long?
- Which cables have exceeded their emergency temperature and for how long?
- Given a predicted load growth: when in the future cables will reach their maximum design temperature.
analyzes automatically all the thermal section of a system. This may include transmission and the entire distribution system (manhole-to-manhole). The input to the temperature estimator is the archived loading information usually available through the SCADA/PI. As output CHOTE produces a list of cable sections that have exceeded the normal and/or emergency target temperatures.
This paper was presented at the North American Transmission and Distribution Conference, June 13-15, 2006, Montreal, Canada