De-icing Schemes and Operations for Overhead Power Line Based on Shunt Capacitor Over-compensation Method

Abstract

De-icing schemes and operations for overhead power line in 10kV, 66kV and 220kV networks based on shunt capacitor over-compensation method are proposed in this paper. This novel de-icing method is based on characteristics of sinusoidal AC and theory of shunt capacitor over-compensation. By utilizing 10kV capacitor bank, which is installed as standard apparatus in substation, reactive current can be transmitted to the specific deicing power line, which leads to over-compensation of network, and temperature of the power line will be increased. This de-icing scheme and operations are proved and verified in 10kV network by on-site experiments. Focus on characteristics and structure of power grid in China, this method is feasible to transferred and applied in 35kV, 66kV and 220kV networks.

Elimination of total harmonic distortion in transmission lines using adaptive fuzzy logic in de-icing process

“…When the time of icemelting process is increased, the temperature distribution along the conductor will increased too. The time of this process is between half hour and three hours [8]. The time of de-icing process is affected by the outline features that are related to the used conductor.…”

Enhancing Power Grid Resilience Against Ice Storms: State-of-the-Art, Challenges, Needs, and Opportunities

“…The work in [71] showed that by leveraging both the skin effect and dielectric losses, it is possible to produce even heating and, thus, increase the de-icing efficiency. Other AC-based thermal energy de-icing mechanisms include injection of reactive current from capacitor and inductor banks [72], [73], circulating currents from phase-shifting transformers [19], and on-load tap changing transformers [74]. In the case of extra high-voltage transmission lines, ice-melting current flow can be increased by reconfiguring parallel bundled conductors to series connections through switchgears installed at both ends of the line [75].…”