Thyristor converter valve module for HVDC (High Voltage Direct Current) transmission

Abstract

The invention relates to a thyristor converter valve module for HVDC (High Voltage Direct Current) transmission, which is characterized by comprising two valve sections (1 and 2), wherein each valve section is an integrity in structure and comprises a saturated reactor (3), a thyristor unit (4), a DC isobarometric resistor unit, an energy-taking resistor unit, a damping resistor unit (5), a gate unit (6) and a water-cooling system; and in a thyristor-level assembly, the gate unit (6) is arranged at one side of the thyristor unit (4), and the damping resistor unit (5) and a damping capacitor unit (7) are arranged at the other side of the thyristor unit (4). The valve module is watertight, has the advantages of small geometrical size, light weight, convenient assembly and maintenance, simple technical operation and low requirements on operation skills and can effectively improve the mounting efficiency.

Description

[technical field] [0001] The invention belongs to the field of high-voltage direct current transmission, and in particular relates 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. The converter valves currently in operation have some problems, such as easy water leakage, heavy weight, large structural size, and inconvenient installation and maintenance. Water leakage is currently the key factor affecting the safe operation of the converter valve. The structure and weight characteristics of the converter valve are related to the cost of the converter valve and the convenience of i...

AI Technical Summary

Problems solved by technology

For the modular decentralized structure, the thyristor, damping resistor, damping capacitor, gate unit and saturated reactor inside the valve module are assembled in a modular way. This structure design has too many scattered sub-modules inside the valve module. 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. The operating skills of the installation technicians have high requirements

[0004] The component selection and replacement of the current converter valves in operation is slow, the minimum 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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