Anode saturation reactor of direct-current converter valve

Abstract

The embodiment of the invention discloses an anode saturation reactor of a direct-current converter valve. The anode saturation reactor comprises a shell, a coil, at least one pair of iron cores and an iron core heat dissipater. Each iron core comprises a first iron core part and a second iron core part which are of an upper and lower U-type structure or a left and right C-type structure; the iron cores are buckled between the inner wall and the outer wall of the coil to form closed coupling; the iron cores are arranged in the circumferential direction of the coil; the iron core heat dissipater is arranged in the inner wall of the coil and makes contact with the iron cores; the iron core heat dissipater is exposed in air and is in butt joint with the shell.

Description

technical field [0001] The invention relates to reactor technology in the field of power system components, in particular to an anode saturated reactor of a DC converter valve. Background technique [0002] Saturable reactors for DC converter valves are key components of thyristor converter valves in UHVDC transmission projects. It also plays a pressure equalizing role on the converter valve, and has achieved the purpose of protecting the converter valve. [0003] The existing anode saturable reactors for DC converter valves mainly have the following methods: Method 1, using a fixed number of coil turns, the logarithm of the iron core is adjustable, and placing the coil and iron core in the saturable reactor for DC converter valves The upper and lower covers are filled with anti-seismic materials. The disadvantage of this method is that the heat dissipation effect of the iron core is poor, and the core loss is relatively large under the premise of meeting the performance re...

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Problems solved by technology

[0003] The existing anode saturable reactors for DC converter valves mainly have the following methods: Method 1, using a fixed number of coil turns, the logarithm of the iron core is adjustable, and placing the coil and iron core in the saturable reactor for DC converter valves The upper and lower covers are filled with anti-seismic materials. The disadvantage of this method is that the heat dissipation effect of the iron core is poor. Under the premise of meeting the performance requirements, the iron core loss is relatively large.

The second method is formed by coupling a pair of iron cores and coil windings with variable turns. The inductance can be adjusted by adjusting the number of iron cores and the number of turns of the coil. The disadvantage of this method is that the external dimensions of the reactor are difficult to control , and the iron core and coil are cooled by separate water cooling, the water circuit is complex

Method 3: Separately set water-cooled anode saturated reactors for DC converter valves for coils and iron cores. The anode saturated reactors for DC converter valves have good performance in heat dissipation, shock resistance, and noise reduction. Increased core water-cooling branch, resulting in the complexity of waterway design and the possibility of waterway blockage and water leakage

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