Alternating-current power-supply-uninterrupted ice melting method and device for multi-split wires

Abstract

The invention discloses an alternating-current power-supply-uninterrupted ice melting method for multi-split wires. At least one ice melting converter is connected to each phase of line in the middle of a line ice melting section in series, each ice melting converter is provided with at least two sets of primary lateral coils and at least one set of secondary lateral coil, the two sets of primary lateral coils are connected into the middle of one phase of line to enable the phase of currents to flow through the two sets of primary lateral coils in two branches and generate secondary currents in the secondary lateral coils in an induced mode, the alternating currents output by the secondary lateral coils through tapping points or load regulators are converted into direct currents through a rectification loop, then the direct currents are loaded onto an ice melting loop formed by the multi-split wires of the phase of line to form ice melting loop currents, the heating amount of the ice melting loop currents and the heating amount of load currents of the lines are controlled to be overlaid, and the effect of line protection or ice melting is achieved. An ice melting device manufactured through the method is hung in the middles of three phases of high-voltage lines in a phase-split mode and runs with the high-voltage lines in an equal potential mode. The device is low in insulation requirement, small in size and low in manufacturing cost, and cannot cause line-to-ground faults and phase-to-phase faults.

Description

technical field [0001] The invention relates to a method for melting ice of a power line and a power device thereof, in particular to a method and a device for melting ice of an AC line with multiple split wires without power failure. Background technique [0002] The problem of icing on power lines is an important issue that is generally concerned by countries all over the world. [0003] Retrieve the ice melting technology of international and domestic power lines, commonly used are divided into two categories: one is manual deicing or mechanical deicing, the deicing workload is large, the power outage time is long, the loss of power outage is large, and the mechanical deicing method is not mature . The second type is thermal ice melting, which is divided into two types: power-off ice-melting and non-power-off ice-melting. [0004] There are two common ways to melt ice in a power outage: [0005] 1. AC short circuit upflow ice melting: [0006] Connect 2 to 3 lines to ...

AI Technical Summary

Problems solved by technology

The disadvantage is that only two phases can be melted at a time, the time for melting ice is long, the workload of knife switch operation and manual setting of short-circuit lines is large, and power failure is required.

However, when this method is used to melt ice on 220kv and above lines, the required device capacity increases with the increase of line voltage, and the economy is not good.

[0015] Based on the above analysis, the problem of ice melting of power lines without power failure can be divided into three categories to be studied separately: one is the problem of ice melting of parallel lines of single conductors or ring network lines, generally 10KV, 35KV, and 110KV transmission lines, The method of the above-mentioned Chinese patent application (CN201110410482.4 and CN201210545515.0) is feasible; the second is that the single power line supplying power to the user cannot form a ring network and is a problem of melting ice for a single wire line, generally 0.4KV, 10KV and For 35KV distribution network lines, there is no mature non-stop deicing solution at present; the third is the non-stop deicing problem of multi-split conductors, mainly 220KV and above high-voltage, ultra-high voltage, and ultra-high voltage transmission lines

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