Intelligent circulation anti-icing method for transmitting current by split lead

Abstract

The invention provides an intelligent circulation anti-icing method which can be applied to two to twelve and more split lead power transmission lines to transmit current. The method can be applied to any icing tension line section of a power transmission line and can accurately judge whether the icing prevention needs to be started or not automatically according to the line icing condition to realize the automation and the intellectualization of the whole anti-icing process. The method comprises the following steps of: mounting a control device; detecting the environmental parameter and judging whether the current environment needs to start the icing prevention or not by the control device; grouping sub-leads of the split lead; and when the anti-icing operation needs to be started, sequentially converging currents of all split leads at the transmitting end of the anti-icing section on each group of sub-leads according to preset interval time by the control device. The invention increases the transmission current of the sub-leads, achieves the aim of icing prevention by joule heat and can realize the automation and the intellectualization of the local or whole anti-icing process without adding an ice thawing power supply and the icing detection on the line and damage the icing condition before the generation of ice.

Description

technical field [0001] The invention relates to the technical field of high-voltage, ultra-high voltage and ultra-high voltage transmission, in particular to an automatic and intelligent anti-icing method for high-voltage, ultra-high voltage and ultra-high voltage transmission lines. Background technique [0002] In an environment with low temperature and high humidity, the transmission lines of the power system will be covered with ice, which will easily lead to accidents such as tower collapse and disconnection, which will cause large-scale power outages, affect the safe and reliable operation of the power system, and cause major economic losses. loss. [0003] Deicing and anti-icing of transmission lines has always been the focus of attention at home and abroad. The existing anti-icing technology for transmission lines needs to be carried out under the guidance of external equipment or manual operation. A deicing power transmission line with multiple wires disclosed in ...

AI Technical Summary

Problems solved by technology

The existing deicing method is inconvenient, the deicing process is complicated, the deicing cost is high, manual operation is required, and real-time automatic and intelligent anti-icing cannot be realized. Anti-icing of UHV split conductors; another example is a method of melting ice for transmission lines suitable for multi-split conductors disclosed in the Chinese invention patent publication with publication number CN101409438A: at the junction of substations or converter stations and multi-split conductor transmission lines Install corresponding two to four ice-melting switches controlled by an electric operating mechanism. On the side of the power transmission line, use suspension string insulation, tension string insulation, middle span and jumper insulation to insulate the sub-conductors of the split conductors from each other. In the case of ice-covered conductors, open more than one ice-melting switch to disconnect the connected split conductors, thereby increasing the current density in the remaining connected split conductors, and increasing the calorific value of the connected conductors to melt ice; To disclose how to judge whether to start anti-icing, it is necessary to manually start the anti-icing process, and at the same time, the ice-melting switch is installed at the junction of the substation and the transmission line. When the ice is melted, the wires in the non-ice section will heat up, seriously damaging the wires, and the operation is complicated , At present, the failure rate of the operating mechanism is relatively high, and the addition of ice-melting switches and supporting devices will affect the reliability of the power system and make maintenance inconvenient

At the same time, in the prior art, there are all methods of deicing the ice-coated lines, and there is no method of anti-icing through the transmission current of the lines before the lines are iced.

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