A saturable reactor with resistance forming bias voltage

Abstract

The invention relates to a saturation resistor for forming bias voltage through resistance. The reactor comprises a closed loop iron core, wherein two iron core columns of the closed loop iron core are provided with at least two coils respectively; the number of turns of each coil is the same; the two iron core columns are provided with a homonymous end connecting terminal I of one coil respectively and a heteronymous end connecting terminal II of the other coil respectively; a thyristor is forwardly connected in series between remaining terminals of the two coils of one iron core column; another thyristor is reversely connected in series between remaining terminals of the two coils of the other iron core column; a control terminal of each thyristor is connected with a control circuit; a pair of resistors are connected in series between positive electrodes of the two thyristors; another pair of resistors are connected in series between negative electrodes of the two thyristors; the resistance values of the four resistors are equal; a node between the two pairs of resistors is connected with a diode; the size of a trigger angle of each thyristor is controlled by the control circuit, so continuous adjustment of the size of the reactance value of the saturation reactor is realized.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation in electric power systems, in particular to a saturated reactor in which resistance forms a bias voltage. Background technique [0002] Reactors are widely used in power systems. The series reactor can limit the short-circuit current; the shunt reactor can limit the overvoltage; the combination of the reactor and the capacitor can form a filter circuit. In some application fields, the reactance value of the reactor is fixed; in some application fields, the reactance value of the reactor should be adjusted continuously with the change of the power system operation mode. The controllable saturable reactor (also called: saturable reactor, magnetron reactor) whose reactance value can be adjusted continuously is an important research topic. [0003] The saturable reactor uses the saturation characteristics of the closed-loop iron core of the saturable reactor to change t...

AI Technical Summary

Problems solved by technology

However, the existing saturable reactor coil needs taps, and the manufacturing process is complicated

The tap position has a great influence on the characteristics of the saturable reactor. After the tap position is determined, it cannot be changed, and the optimal design of the saturable reactor cannot be realized.

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