Current-circulating intelligent ice-melting device for hepta-bundled conductor power transmission line

Abstract

The invention relates to a current-circulating intelligent ice-melting device for a hepta-bundled conductor power transmission line. According to the current-circulating intelligent ice-melting device, whether an icing phenomenon appears is judged through monitoring external environment conditions, a circuit breaker is controlled to be switched on and off by using an intelligent controller, the total current transmitted by a hepta-bundled conductor is respectively transferred onto a part of sub-conductors, and therefore the purpose of ice melting by increasing the current density of the conductor is achieved. The intelligent controller is used for automatically calculating the required icing time by adopting the load current measured by an electricity-taking sensor, an icing state measured by an icing parameter monitoring unit and external conditions; and after a part of sub-conductors are subjected to ice melting, the intelligent controller is used for controlling the circuit breaker to transfer the current to the other part of sub-conditions till ice layers on seven sub-conductors are completely molten and fall off, and then the intelligent controller returns to a normal working state. When the current-circulating intelligent ice-melting device works, the intelligent controller is used for carrying out integral control, and the working judgment standard of the intelligent controller is provided by an electricity-taking mutual inductor, the icing parameter monitoring unit and the external environment, so that automatic ice-melting and ice-removing operation of the power transmission line can be achieved without manual intervention.

Description

technical field [0001] The invention relates to the technical field of voltage transmission, in particular to a high-voltage transmission line ice-melting device for seven-split conductors. Background technique [0002] In the environment of low temperature and high humidity in winter, high-voltage power transmission lines will be covered with icing. Severe icing will lead to major accidents such as the collapse of transmission line towers and broken wires that affect the safe and reliable operation of the power system, causing large-scale power outages in the power grid. Seriously affect industrial and agricultural production and people's lives, and cause huge economic losses. [0003] Anti-icing, melting and deicing of high-voltage transmission lines have always been the focus of attention at home and abroad. The existing deicing and anti-icing technology for high-voltage transmission lines is still immature and cannot meet the requirements of large-area anti-icing and de...

AI Technical Summary

Problems solved by technology

This method needs to add switchgear and change the structure of the transmission line. The power supply must be interrupted during the ice melting process. There are safety hazards in ice melting and extremely inconvenient operation. The cost of ice melting is high. Different degrees of ice-coated line sections and real-time anti-icing are not feasible for the switch breaker wires used in ultra-high voltage lines, especially the anti-icing of UHV split wires cannot be satisfied; A multi-split transmission line automatic melting ice method and its special switch, which is to install special switches in the substations at both ends of the ice-covered transmission line, and then manually remote control to issue instructions to make the special switch move to realize the transfer of all currents of the transmission line to ice-melting The sub-conductor of the sub-conductor, the sub-conductor generates heat and melts ice. This invention patent needs to manually judge whether there is ice on the field line, and needs the power dispatching department to cooperate with the adjustment of the line load. The degree of segmentation and real-time intelligent ice melting is required. It is difficult for technicians to rush to the scene to observe the ice situation and issue ice melting instructions for local ice-covered sections such as micro-climate and micro-meteorology.

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