IEEE 738-2006 IEEE Standard for Calculating the Current-Temperature of Bare Overhead Conductors

IEEE 738-2006 Стандарт IEEE для расчета текущего котемпературной Голые ВЛ Проводники

The purpose of this standard is to present a method of calculating the current-temperature relationship of bare overhead conductors. Conductor surface temperatures are a function of the following:a) Conductor material propertiesb) Conductor diameterc) Conductor surface conditionsd) Ambient weather conditionse) Conductor electrical currentThe first two of these properties are specific chemical and physical properties. The third may vary with time and be dependent upon ambient atmospheric conditions other than weather. The fourth, weather, varies greatly with the hour and season. The fifth, conductor electrical current, may be constant or may vary with power system loading, generation dispatch, and other factors.The equations relating electrical current to conductor temperature may be used in either of the following two ways:-- To calculate the conductor temperature when the electrical current is known-- To calculate the current that yields a given maximum allowable conductor temperatureFor the purposes of this standard, either the electrical current is assumed constant for all time or it is assumed to undergo a step change from an initial current to a final current. The ambient weather conditions are assumed to be constant with time in both the steady-state and transient