Details

Autor(en) / Beteiligte

• Ivanov, N. G.
• Vorobyev, E. S.
• Antonov, V. I.
• Naumov, V. A.
• Soldatov, A. V.

Titel

Adaptive Methods for Ensuring the Efficiency of Intelligent Automatic Reactivation of Ultra-High-Voltage Power Lines

Ist Teil von

• Russian electrical engineering, 2022, Vol.93 (8), p.533-538

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2022

Quelle

SpringerLink

Beschreibungen/Notizen

• The efficiency of reducing switching overvoltages during reclosing of long high-voltage transmission lines is achieved by intelligent automatic reclosing due to precise control of a circuit-breaker switching instant. The required accuracy of the intelligent automatic reclosing is provided by adaptive control algorithms that take a number of technologically important features of the circuit breaker closing process into account. First, as a rule, the moment of closing the electrical circuit does not coincide with the moment of closing the contacts of the switch due to electrical breakdown of the intercontact gap when the contacts approach each other. Second, the moment of closing the contacts itself deviates from the calculated one due to the spread in the time of the circuit breaker drive action. Third, the operating time of the circuit breaker contact system changes under the influence of environmental conditions and during operation. This paper presents the basics of taking into account these features of the electromechanical characteristics of high-voltage circuit breakers in precision control algorithms. It is shown that the effectiveness of intelligent automatic reclosing is ensured by adaptive-control algorithms that take into account the effect of ambient temperature, drive energy stored, supply voltage of control circuits, breaker idle time, operational wear of the circuit breaker, and the dynamics of changes in the electric strength of the intercontact gap during the cycle of switching.