Water-cooled resistor assembly with characteristics of non-partial discharge and electrolytic corrosion resistance

Abstract

The invention relates to a water-cooled resistor assembly which employs a parallel inner water path structure and is composed of an individual inner water path 1 and an individual inner water path 2, two resistor cores are distributed in the parallel water path, each resistor core is simultaneously distributed in the inner water path 1 and the inner water path 2, and the same resistor core which is simultaneously distributed in the inner water path 1 and the inner water path 2 presents a series circuit relation. Two resistor cores comprise a resistor core with large power, which employs a multiheads parallel leading-out anticorrosion structure, and the leading-out anticorrosion structure is welded to a large inner electrode, the resistor cores comprise another resistor core with small power, which employ a plastic coated alloy wire anticorrosion structure, and the plastic coated alloy wire anticorrosion structure is welded to a small inner electrode; an anticorrosion electrode is welded to the large inner electrode and the small inner electrode, and an air isolation spacer is added between two resistor cores. The water-cooled resistor assembly has the beneficial effects that the water-cooled resistor assembly can increase the service life of the water-cooled resistor in the working condition of direct current by more than N times; the anticorrosion electrode can be increased, the requirements of long service life of the resistors can be satisfied for clients; the air isolation spacer can eliminate the partial discharge, and the product provided by the invention can be used for high voltage devices in an electric power system.

Description

1. Technical field [0001] The invention belongs to the field of water cooling resistors. 2. Background technology [0002] The existing water-cooled resistor assembly is to open a continuous water tank on the main board of an insulating water shell, one end of the water tank is connected to the water inlet, the other end is connected to the water outlet, four electrodes are embedded on the main board, and one end of the electrode extends Into the water tank, the other end passes through the resistance shell to the outside as the lead-out end of the resistor, put two independent alloy resistance bands (or wires) in the water tank, and use a spot welder to weld each alloy resistance band (or wire) The two ends of the tank are spot-welded on different electrodes, and then the water tank is closed to form a continuous sealed waterway. When working, the voltage is applied to the lead-out end of the resistor, the cooling water flows in from the water inlet, and takes away the hea...

AI Technical Summary

Problems solved by technology

[0005] The insulating water shell is molded by injection molding. After molding, air holes will remain in the shell. The high voltage during operation will cause partial discharge in the air holes in the insulating wall between the two resistors. Repeated partial discharge will eat away at the insulating wall and shorten the resistance. service life of the assembly

[0006] 2. Under DC conditions, the alloy resistance band will be electrolytically corroded

[0007] Under DC conditions, the resistance alloy strip in water will be electrolytically corroded. The characteristic of electrolytic corrosion is to protect the cathode and corrode the anode. The high-potential circle of the two adjacent circles of alloy strips will be corroded, and the alloy strip closer to the positive electrode will be corroded. The faster the speed, so the alloy strip near the positive solder joint is corroded the most, and eventually disconnects from here, causing the resistor to fail completely

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