A Thyristor Press-fit Structure for Modular Multilevel Voltage Source Converter

Abstract

The invention provides a thyristor press mounting structure for a modular multi-electrical-level voltage source current converter, belonging to assembly fields consisting of a plurality of single semiconductors or other solid devices. The thyristor press mounting structure provided by the invention is a key component for ensuring the safe and stable operation of a voltage source current converter, has a favorable structural design, and can assist the modular multi-electrical-level voltage source current converter to develop the advantage of the topological structure. The press mounting structure comprises a positive bus bar, a negative bus bar, a thyristor and a press mounting framework; the positive bus bar and the negative bus bar are respectively pressed and mounted at the anode side and the cathode side of the thyristor, and are convenient to be connected with the main circuit of the voltage source current converter, the contact surfaces of the positive bus bar and the negative bus bar and the anode and cathode of the thyristor are subjected to surface treatment (such as nickel plating or silver plating) so as to reduce the contact resistance between the positive bus bar and the negative bus bar and the anode and cathode of the thyristor; and a plurality of insulation modes can be provided between the thyristor and the press mounting framework so as to meet the requirements of different occasions. The press mounting structure has the advantages of compact structure, reasonable design and favorable generality.

Description

technical field [0001] The invention belongs to the field of assemblies composed of a plurality of single semiconductors or other solid devices, and in particular relates to a thyristor pressing structure for modular multilevel voltage source converters. Background technique [0002] In order to alleviate problems such as energy shortage and environmental pollution, the large-scale development and utilization of renewable energy such as wind energy and solar energy has become the general trend. However, renewable energy such as wind energy and solar energy have the disadvantages of being dispersed and intermittent. When wind power and photovoltaic power generation are connected to the grid using traditional AC transmission technology or conventional DC transmission technology, they will bring a series of problems to the power system, and this This problem will become increasingly prominent as the scale of renewable energy utilization expands. [0003] Flexible DC transmissi...

AI Technical Summary

Problems solved by technology

However, renewable energy such as wind energy and solar energy have the disadvantages of being dispersed and intermittent. When wind power and photovoltaic power generation are connected to the grid using traditional AC transmission technology or conventional DC transmission technology, they will bring a series of problems to the power system, and this This problem will become increasingly prominent with the expansion of the scale of renewable energy utilization

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