Reactive compensation system of thyristor controlled magnetically controlled reactor

Abstract

The invention discloses a reactive compensation system of a thyristor controlled magnetically controlled reactor, comprising an automatic control system, a magnetically controlled reactor and filter equipment, wherein the automatic control system is electrically connected with the magnetically controlled reactor; the filter equipment is composed of a plurality of reactive filter circuit branches; and the magnetically controlled reactor and the filter equipment are connected on three-phase alternating current in parallel. The system is characterized in that the reactive filter circuit branches are composed of filter capacitors and filter reactors which are mutually connected in series. According to reactive power sampling carried out on the grid system by a voltage sampling circuit and a current sampling circuit in the automatic control system, the signal is sent to a controller and the controller automatically adjusts the thyristor control angle of the magnetically controlled reactor to change the winding DC and control core saturation and realizes continuous adjustment of the reactance, thus realizing fast reactive power compensation. The system can quickly track reactive fluctuation of the grid or load and carry out random real-time compensation to maintain voltage stability.

Description

technical field [0001] The invention relates to the technical field of harmonic control and reactive power compensation of a three-phase AC power transmission and distribution system, in particular to a reactive power compensation system of a thyristor-controlled magnetron reactor. Background technique [0002] In recent years, the interconnection and long-distance and large-capacity power transmission of power systems have become an important trend in the development of the power industry. However, the rapid development of the power system has also led to new contradictions and increasingly prominent problems. With the rapid development of power electronic equipment and the continuous expansion of its application in the industrial field, a large number of inductive loads in the power grid, such as motors, transformers and fluorescent lamps, are Inductive loads, these inductive loads seriously reduce the power factor of the grid during the commissioning process. When some p...

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Problems solved by technology

Although this reactive power compensation device that divides the reactor coil into two can protect the thyristor from excessive short-circuit current when the coil is damaged, and the thyristor can withstand a small overvoltage when the overvoltage occurs, the disadvantage is that when the total reactance value is one Timing, talent, the reactor coil with the same two electrical parameters will consume more raw materials than the single reactor coil, which will increase the production cost

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