Thyristor valve controlled type controllable paralleling reactor device configured with parallel valve branches

Abstract

The invention belongs to the reactive compensation field of power system, and provides a thyristor valve controlled type controllable paralleling reactor device configured with parallel valve branches. A controllable paralleling reactor body uses a transformer structure to be designed into a form of high short-circuit impedance or a form of a common transformer external reactor according to requirements. Three phases of the windings at a high voltage side of the controllable reactor are connected to be Y-shaped; a three-phase low voltage side has the same structure; each thyristor valve set is serially connected to a corresponding volume configuration reactor to form the valve branches of which each one is connected in parallel and configured between head and tail ends at the low voltage side; and a breaker is serially connected to a breaker serially connected reactor and connected between the head and tail ends of the low voltage side. When the manner of thyristor valve current zero-cross switching is used, the volume classification adjustment procedure is completed by the manner of thyristor valve current zero-cross switching; when the manner of thyristor valve phase control is used, the fast and smooth adjustment of the output reactive power is realized by controlling a conduction angle of the thyristor.

Description

technical field [0001] The invention belongs to the field of reactive power compensation in electric power systems, and in particular relates to a thyristor valve-controlled controllable parallel reactor device configured in parallel with valve branches. Background technique [0002] According to the national renewable energy development plan, the northwest region will build a 10 million-kilowatt wind power base along the Hexi Corridor, which is far away from the load center. In the case of large-scale wind power grid-connected, the efficient and economical delivery of wind power and the safe and stable operation of the power grid have become constraints in the northwest. Two major technical problems in the development of wind power in the region. Wind power generation has the characteristics of intermittent, fluctuating and random. The output of wind farms varies greatly, and the fluctuation of wind power makes reactive power fluctuate frequently on the 750kV transmission ...

AI Technical Summary

Problems solved by technology

At home and abroad, there is no thyristor valve-controlled controllable shunt reactor device with valve branch parallel configuration proposed by the present invention, which is put into ultra-high voltage / ultra-high voltage power grid applications

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