JPS5928714U

JPS5928714U - reactive power compensator

Info

Publication number: JPS5928714U
Application number: JP12340582U
Authority: JP
Inventors: 信東
Original assignee: 日新電機株式会社
Priority date: 1982-08-14
Filing date: 1982-08-14
Publication date: 1984-02-22

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のアーク炉等に対する無効電力補７　　　
償装置をブロック図で示す。第２図は連窓Ｑ検出、器を
ブロック図で示す。第３図は本考案の一実施１′　　　
　例をブ・ツク図で示す。第４図は本考案における１ｊ　　　　主要部をブロック図で示す。第５図は本考案
の動作説明のための図である。第６図は本考案で使用さ
れる真の制御量演算器の一例を示し、第７図Ａ。Ｂはそれぞれ第６図の演算器において使用される制御量
検出部をそれぞれ例示する。第８図は第６図の真の制御
量演算器に使用されるリップル除去部を示す。第９図は
従来の装置と本案装置による無効電力補償比較図である
。第１０図は本考案における連込Ｑ検出器の出力ＱＦ（
！：パルス出力Ｐ工′。ＰＩの関係を示すグラフである。１・・・電力系統、２・・・直列リアクトル、３・・・
サイリスクスイッチ、４・・・交流パワーフィルタ、５
・・・アーク炉用変圧器、６・・・アーク炉、７・・・
連込Ｑ検出器、８・・・パルス発生器、９・・・パルス
増巾器、７１・・・移相器、７２・・・乗算器、７３・
・・遅延要素、７４・・・合成器、７５・・・リップル
フィルタ、１０１・・・真の制御量演算器、１０２・・
・サンプルホルダ、１０３・・・合成器、１０４・・・
パルス発生器。Figure 1 shows reactive power supplement 7 for conventional arc furnaces, etc.
2 shows a compensation device in block diagram form; FIG. FIG. 2 shows a block diagram of a continuous window Q detection device. Figure 3 shows one implementation 1' of the present invention.
An example is shown in a book diagram. FIG. 4 shows a block diagram of the main parts of 1 j in the present invention. FIG. 5 is a diagram for explaining the operation of the present invention. FIG. 6 shows an example of a true control amount calculator used in the present invention, and FIG. 7A. B each illustrates a control amount detection section used in the arithmetic unit of FIG. 6, respectively. FIG. 8 shows a ripple removal section used in the true control amount calculator of FIG. FIG. 9 is a comparative diagram of reactive power compensation between the conventional device and the present device. Figure 10 shows the output QF (
! :Pulse output P'. It is a graph showing the relationship of PI. 1...Power system, 2...Series reactor, 3...
Cyrisk switch, 4... AC power filter, 5
...Arc furnace transformer, 6...Arc furnace, 7...
Entrainment Q detector, 8... Pulse generator, 9... Pulse amplifier, 71... Phase shifter, 72... Multiplier, 73...
...Delay element, 74...Synthesizer, 75...Ripple filter, 101...True control amount calculator, 102...
- Sample holder, 103...Synthesizer, 104...
pulse generator.

Claims

[Scope of utility model registration request]

In a reactive power compensator consisting of a slow phase reactive power consumption circuit consisting of a series circuit of a reactor and an anti-parallel thyristor, and an AC filter equipment, a Q detector with a fast response but with a large error and a true control amount with a slow response but a small error are used. It is equipped with an arithmetic unit and a sample hold for storing the command value in the control interval of the past half cycle of the Q detector having a large error, and calculates the control error in the control interval of the past half cycle of the Q detector having a large error, and calculates the control error of the Q detector having a large error. A reactive voltage compensator that uses the sum of the output of a large Q detector as a control amount in the control section.