JPH0447715U

JPH0447715U -

Info

Publication number: JPH0447715U
Application number: JP9100390U
Authority: JP
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1992-04-23

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案の直列補償型の瞬
時電圧低下補償装置の１実施例を示し、第１図は
全体の結線図、第２図は一部の詳細な結線図、第
３図ａ〜ｄは動作説明用の波形図、第４図、第６
図はそれぞれ従来例の結線図、第５図ａ〜ｄは第
４図の動作説明用の波形図である。１……系統電源、３……負荷、４……交流サイ
リスタスイツチ回路、５……交流フイルタ、９，
３３……電圧検出トランス、２２……制御部、３
０……主インバータ装置、３１……主注入トラン
ス、３２……補助注入トランス、３４……補助イ
ンバータ装置。 1 to 3 show one embodiment of the series compensation type instantaneous voltage drop compensator of the present invention, FIG. 1 is an overall wiring diagram, FIG. 2 is a partial wiring diagram, and FIG. Figures a to d are waveform diagrams for explaining operation, Figures 4 and 6.
The figures are connection diagrams of conventional examples, and FIGS. 5a to 5d are waveform diagrams for explaining the operation of FIG. 4. 1...System power supply, 3...Load, 4...AC thyristor switch circuit, 5...AC filter, 9,
33...Voltage detection transformer, 22...Control unit, 3
0...Main inverter device, 31...Main injection transformer, 32...Auxiliary injection transformer, 34...Auxiliary inverter device.

Claims

[Claims for Utility Model Registration] Power supply control based on monitoring of voltage drop in the AC power supply turns on an AC thyristor switch circuit for a regular power supply path between the AC power supply and the load when the voltage of the AC power supply is normal. , the AC power supply is supplied to the load via the switch circuit and the AC filter, and when an instantaneous voltage drop occurs in the AC power supply, the switch circuit is turned off, and the AC power supply is connected to the secondary of the series compensation transformer. On the other hand, while supplying the load to the load via the AC filter, a low-frequency compensation AC corresponding to the amount of the drop is generated by an inverter drive and injected into the primary side of the series compensation transformer to reduce the drop in the AC power supply. In a series compensation type instantaneous voltage drop compensator that compensates for and suppresses a drop in load voltage based on , an auxiliary injection transformer, and a large-capacity main inverter device that generates the low-frequency compensation AC by the power supply control and injects it into the primary winding of the main injection transformer when an instantaneous voltage drop occurs in the AC power source; a harmonic compensation control unit that monitors and detects harmonic components of the inverter drive included in the load voltage and performs series compensation control of voltage fluctuations based on the harmonic components; frequency, and when an instantaneous voltage drop occurs in the AC power supply, series compensation control of the voltage fluctuation generates a compensation AC for reducing the harmonic component, and injects it into the primary winding of the auxiliary injection transformer. A series compensation type instantaneous voltage drop compensator equipped with an inverter device.