JPH0260454U

JPH0260454U -

Info

Publication number: JPH0260454U
Application number: JP13953188U
Authority: JP
Priority date: 1988-10-26
Filing date: 1988-10-26
Publication date: 1990-05-02

Description

[Brief explanation of drawings]

第１図は本考案の瞬時電圧低下補償装置の１実
施例のブロツク図、第２図は第１図の検出部の詳
細なブロツク図である。１……交流電源、２……負荷、３……サイリス
タスイツチ部、４……注入トランス、５……イン
バータ装置、１１……制御装置、１３……検出部
、１６……駆動切換部、２３……擬似電圧発生回
路、２４……切換スイツチ、２５……検出処理回
路。 FIG. 1 is a block diagram of one embodiment of the instantaneous voltage drop compensator of the present invention, and FIG. 2 is a detailed block diagram of the detection section of FIG. 1. DESCRIPTION OF SYMBOLS 1... AC power supply, 2... Load, 3... Thyristor switch section, 4... Injection transformer, 5... Inverter device, 11... Control device, 13... Detection section, 16... Drive switching section, 23 ... pseudo voltage generation circuit, 24 ... changeover switch, 25 ... detection processing circuit.

Claims

[Claim for Utility Model Registration] A parallel circuit consisting of a thyristor switch section for a normal power supply line and a secondary side of an injection transformer for a compensation power supply line is provided between an AC power source and a load, and the switch section and the compensation AC generation A control device that controls an inverter device for use in the AC power source includes a detection unit that detects a voltage drop in the AC power source from a difference between a reference sine wave voltage synchronized with the AC power source and a detected voltage of the AC power source; A drive switching unit is provided that outputs a switching signal for driving switching between the switch unit and the inverter device based on the signal, and the switching unit is driven when the voltage of the AC power source is normal by switching the drive based on the switching signal. , supplying the alternating current power to the load via the switch unit, driving the inverter device when the voltage of the alternating current power source decreases, and supplying the output alternating current of the inverter device to the primary side of the transformer; In the instantaneous voltage drop compensation device, which supplies a composite power source in which the output AC is injected in series into a power source to the load via the secondary side of the transformer, and compensates for an instantaneous voltage drop of the AC power source in series with the output AC, The detection unit includes a pseudo voltage generation circuit that reduces the reference sine wave voltage to generate a pseudo voltage for forced voltage drop detection, and outputs the pseudo voltage instead of the detected voltage by switching to operation check. and a detection processing circuit that detects a voltage drop from the difference between the reference sine wave voltage and the output voltage of the switch and forms the detection signal, and performs an operation check based on the pseudo voltage. instantaneous voltage drop compensator.