Novel thyristor converter valve module

Abstract

The invention provides electronic equipment with high voltage and high power, which is used for converting alternating current (AC) voltage into direct current (DC) voltage or converting DC voltage into AC voltage, in particular a thyristor converter valve module. A whole valve module is divided into two same segments, and each segment comprises a saturable reactor, a thyristor, a DC equalizing resistor unit, an energy-extracting resistor unit, a damping resistor unit, a damping capacitor unit, a gate electrode unit and a water cooling system, wherein the reactors of the electronic equipment are connected in series to meet the requirements on different transmission powers and different power voltage grades. The equipment is core equipment for high-voltage DC power transmission and can be applied to a DC-AC converting system, meet the requirements of different voltage grades and for the DC converting system with different voltage grades, including the super high voltage of 800 kV or above.

Description

technical field [0001] The invention relates to the field of high-power electric power electronic converter valves in electric power systems, in particular to a thyristor converter valve module for high-voltage direct current transmission. Background technique [0002] As the core component of the HVDC transmission system, the converter valve has been developed and applied for many years. The converter valve module of traditional HVDC power transmission is based on the thyristor series structure as the core, and at the same time includes the control, trigger and protection system of the thyristor. Focusing on the safe and reliable operation of the thyristor, the converter valve module includes the following auxiliary components: saturable reactor, thyristor unit, damping resistor unit, damping capacitor unit, DC voltage equalizing resistor, energy-taking resistor, used for thyristor control, triggering and protection The control unit, and the water cooling system to meet th...

AI Technical Summary

Problems solved by technology

The metal frame type valve module has high structural support strength, but the requirements for electrical insulation must be considered under high voltage, which will increase the structural size of the valve module frame, waste the internal space of the valve module, and increase the weight of the valve module. Big

The combined frame valve module has the problem of mechanical strength. Because the valve module frame has to bear a large weight load, the structural strength of the insulating channel beam, such as tensile strength, bending strength and shear strength, is very high. Increase the difficulty and manufacturing cost of the valve module design, which is not conducive to the engineering application of the converter valve

In the modular decentralized valve module structure, the thyristors, damping resistors, damping capacitors, gate units and saturated reactors inside the valve module are assembled in a modular manner. This structure design has a number of dispersed sub-modules inside the valve module. Too many, resulting in the difficulty of on-site assembly of the valve module project, and it is not conducive to the improvement of the installation efficiency of the valve module. At the same time, this modular decentralized structure requires high precision on-site installation. The operating skills of the technicians who install the modules are highly demanded

[0005] The component selection and replacement of the current converter valves in operation is slow, the latest technology of the current components is not applied, and it cannot meet the needs of the current DC transmission boost and capacity increase

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