A novel superconductive controllable reactor

Abstract

The invention provides a novel superconductive controllable reactor which mainly comprises a superconducting field winding, an excitation DC power supply, a detection control unit, an AC winding, a short-circuit winding and an iron core and so on. The novel superconductive controllable reactor can timely adjust the inductance value according to the running state of an electric grid so as to cause the reactive power in the electric grid to be compensated timely and completely, thus reducing the operation loss of the electric grid and improve the power supply quality of the system. Compared with traditional controllable reactor, the novel superconductive controllable reactor is safe and reliable in working and has higher overvoltage and overloading capacity; furthermore, the service life is long, the running cost is low and the installation and maintenance are easy. The advantages of the reactor are more distinct in the 35KV or higher electric grid levels.

Description

technical field [0001] The invention relates to a novel superconducting controllable reactor, which belongs to the technical field of dynamic reactive power compensation of transmission lines. Background technique [0002] With the rapid development of the national economy, the electric power industry is also developing rapidly. People's demand for electric energy is increasing day by day, and at the same time, the requirements for the reliability and quality of power supply are also getting higher and higher. Due to the continuous increase of load and the substantial increase of power plants, not only the network structure of the power system has been changed, but also the power supply distribution of the system has been changed, resulting in unreasonable reactive power distribution of the system. It may even cause a serious shortage of reactive power in some areas and a generally low voltage level. The unreasonable distribution of reactive power in the power system not on...

AI Technical Summary

Problems solved by technology

[0004] ①Due to the limitation of thyristor valve manufacturing level, traditional controllable reactors cannot be directly used in systems above 35kV, and are usually connected to high-voltage power grids through step-down transformers;

[0005] ②Traditional controllable reactors bring a large number of harmonics, requiring additional filtering devices;

[0006] ③ Thyristor valves require accurate control and complex protection devices;

[0007] ④ Thyristors are used to provide full voltage compensation, high voltage thyristors are very expensive

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