Stepless rapid phase-control reactive power dynamic compensation device and compensation method thereof

Abstract

The invention discloses a stepless rapid phase-control reactive power dynamic compensation device and a reactive dynamic compensation method. The device comprises a compensation transformer and a control circuit thereof, a capacitor or a capacitor bank; wherein, a secondary winding of the transformer is connected between an access bus and the capacitor in series; a primary winding of the transformer is connected to the output terminal of the control circuit; the control circuit comprises a phase-adjusting circuit adapted with a working power supply, a signal detection circuit connected between the access bus and the phase-adjusting circuit in series and a sampling circuit connected between the phase-adjusting circuit and the output side of the secondary winding of the transformer; the primary winding of the transformer is connected to the output terminal of the phase-adjusting circuit. The reactive compensation of the invention can be realized only by adjusting the output voltage phase of the phase-adjusting circuit, therefore, the invention can realize stepless compensation and has high adjusting accuracy, rapid response, high efficiency and good compensation effect. The compensation device and method of the invention are suitable for all the voltage grades of the existing power grids and various places such as substations, electrified railways and the like.

Description

technical field [0001] The invention relates to a reactive power dynamic compensation method and a reactive power dynamic compensation device, and more specifically relates to a stepless fast phase-controlled reactive power dynamic compensation device and a compensation method thereof. Background technique [0002] In the distribution network, the reactive power generated by the power generator and the power of the transmission line are often insufficient to meet the reactive power demand of a large number of motors, transformers, reactors, fluorescent lamps and other inductive loads in the network and the reactive power loss in the system. , which often leads to a decrease in the power factor of the grid and a decrease in the utilization rate of the grid system. In order to reduce active power loss and voltage drop, reduce loss in power transmission, ensure safe, economical and efficient operation of the power grid, and improve the capacity and quality of power transmission...

AI Technical Summary

Problems solved by technology

[0004] Static compensation: often divided into fixed or graded compensation, the general structure is relatively simple, and AC contactors are mostly used as switching actuators for power capacitors, but the disadvantage is that only fixed gears can be adjusted, and the compensation accuracy is low; moreover, the compensation When the capacitor is switched, the impact current is large, the switching speed is slow, and the failure rate of the contactor is high due to frequent switching

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