JPH02101967A - Thyristor rectifier for electrolysis - Google Patents
Thyristor rectifier for electrolysisInfo
- Publication number
- JPH02101967A JPH02101967A JP25311188A JP25311188A JPH02101967A JP H02101967 A JPH02101967 A JP H02101967A JP 25311188 A JP25311188 A JP 25311188A JP 25311188 A JP25311188 A JP 25311188A JP H02101967 A JPH02101967 A JP H02101967A
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- Japan
- Prior art keywords
- signal
- voltage
- control
- tap
- thyristor rectifier
- Prior art date
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Links
- 238000005868 electrolysis reaction Methods 0.000 title description 3
- 238000004804 winding Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Rectifiers (AREA)
Abstract
Description
【発明の詳細な説明】
〔腫東上の利用分野〕
この発明は、ソーダ１！解装置、アルミナ電解装置など
互いに直列接続された複数の電解装置を負荷とする１解
用サイリスタ喪流装置、ことにその出力直流電圧の制御
回路に関する。[Detailed Description of the Invention] [Field of Application of the Magatojo] This invention is based on the soda 1! The present invention relates to a single electrolysis thyristor current loss device whose load is a plurality of electrolyzers connected in series, such as electrolyzers and alumina electrolyzers, and particularly to a control circuit for its output DC voltage.
電解工業など、数ｖ程度の低電圧で数万人の直流電流を
必要とする電解装ｆｉ［ｙｆｒ：負荷とする電解用サイ
リスタ整流器置においては、′ｒｔ解装置を数台から十
台程度厘列接続してサイリスタ整流器に接続した方がサ
イリスタ素子の耐電圧性能を有効に活用でき、かつ降圧
変圧器の直流巻線数が少くてすむなどの利点があシ広く
使用されている。また直流電圧の制御をサイリスタ整流
器を位相制御することによって行う方式が広く知られて
いる。In the electrolytic industry, etc., which require tens of thousands of DC currents at low voltages of about a few volts, thyristor rectifier equipment for electrolysis is used as a load. Connecting thyristor elements in series to a thyristor rectifier is widely used because of its advantages, such as making more effective use of the withstand voltage performance of the thyristor elements and reducing the number of DC windings in the step-down transformer. Also, a widely known method is to control the DC voltage by controlling the phase of a thyristor rectifier.
位相制御されるサイリスタ整流器の制御角αにおける直
流電圧平均（［Ｅｄは、制御角α＝Ｏにおける直流電圧
平均値・ＥｄＯと制御角αの余弦Ｃｏａαとの槓に比例
するので、制御角αを制御することにより、出力直流電
圧を大幅に変化させることが可能である。ところが、
Ｃｏｓαは装置の力率でもあるために、制御角αを大き
くして出力直流電圧Ｅｄを低い値に絞り込んだ場合には
、装置の力率も著しく悪くなる。また、装置の力率Ｃｏ
ｓαの低下は、併せて交流電力系統の力率（＋１！路力
率）に悪影響を及ぼし、ひいては電源容量の増大を必要
とするので、電力事情の悪い地域や国々においては、１
！解用サイリスタ整流装置の力率Ｃｏｓαの改善が重要
な課題になりている。ことに、直列電解装置の競合かを
短絡して運転台数を制御する方式では、運転台数に対志
して直流電圧Ｅｄ ｔｌ−制御する必要があるので、位
相制御のみでは制御角αが大きくなシ、線路力率に及ぼ
す悪影響が深刻な問題になる。The DC voltage average at the control angle α of the phase-controlled thyristor rectifier ([Ed is proportional to the DC voltage average value at the control angle α=O EdO and the cosine Coaα of the control angle α, so the control angle α is By controlling the output DC voltage, it is possible to change the output DC voltage significantly.
Since Cosα is also the power factor of the device, when the control angle α is increased to narrow down the output DC voltage Ed to a low value, the power factor of the device also becomes significantly worse. Also, the power factor Co of the device
A decrease in sα also has a negative effect on the power factor (+1! road power factor) of the AC power system, and in turn requires an increase in power supply capacity.
! Improving the power factor Cos α of the thyristor rectifier for use in the thyristor system has become an important issue. In particular, in the method of controlling the number of operating units by short-circuiting competing electrolyzers in series, it is necessary to control the DC voltage Ed tl- with respect to the number of operating units, so the control angle α becomes large with only phase control. However, the negative effect on the line power factor becomes a serious problem.
この発明の目的は、直流電圧を低い電圧に制御した場合
においても力率ＣＯＢαの低下が少く、こＣＰ
れによｌＥｉ路力率に及ぼす悪影響をｉ制することにあ
る。An object of the present invention is to minimize the decrease in the power factor COBα even when the DC voltage is controlled to a low voltage, thereby suppressing the negative effect on the road power factor.
上記課題を解決するために、この発明によれば、降圧変
圧器の直流巻縁側に配されたサイリスタ整流器を位相制
御することにより、その負荷側に複数台直列接続された
！解装置の運転台数に対応して出力電圧および電流を制
御するものにおいて、前記降圧変圧器の交流巻線側沈設
けられたタップ切換装置と、前記サイリスタ整流器の出
力電流検出信号とその設定信号とを突き合わせその偏差
を積分した電圧信号を制御角指令信号として出力する比
内槓分形電流調節器と、前記制御角指令信号が所定のし
きい値範囲を超えたとき前記タップ切換装置にタップ切
換を指令する交流側電圧制御部と、前記降圧変圧器の端
子電圧検出信号を同期信号として前記制御角指令信号レ
ベルに比例した制御角を有する制御信号を前記サイリス
タ整流器のゲート回路に向けて出力する位相制御部とを
備えるものとする。In order to solve the above problems, according to the present invention, by controlling the phase of thyristor rectifiers arranged on the DC winding edge side of a step-down transformer, a plurality of thyristor rectifiers are connected in series on the load side! The output voltage and current are controlled in accordance with the number of operating units of the step-down transformer, and the step-down transformer includes a tap changer installed on the side of the AC winding, an output current detection signal of the thyristor rectifier, and a setting signal thereof. a voltage signal obtained by integrating the deviation thereof and outputting the voltage signal as a control angle command signal; and a phase control unit that outputs a control signal having a control angle proportional to the control angle command signal level to the gate circuit of the thyristor rectifier using the terminal voltage detection signal of the step-down transformer as a synchronization signal. It shall be equipped with a section.
上記手段において、比例積分形電流調節器が発する制御
角指令信号が所定レベル範囲を超えたとき、降圧変圧器
のタップ切換装置に向けて駆動信号を発する交流側電圧
制御部を設けたことによシ、直列電解装置の運転台数の
変化は直流電流の増大。In the above means, when the control angle command signal issued by the proportional-integral current regulator exceeds a predetermined level range, an AC side voltage control unit is provided which issues a drive signal to the tap changer of the step-down transformer. A change in the number of series electrolyzers in operation results in an increase in DC current.
制御角指令信号の増大を介して又流側電圧制御部がタッ
プ切換装ａを降圧タップ側または昇圧タップ側に切換え
ることによシミ圧が＃ｉ調整される。The stain pressure is adjusted to #i by increasing the control angle command signal and by causing the upstream voltage control section to switch the tap switching device a to the step-down tap side or the step-up tap side.
また、変流電圧の制御にともなう直流電流の変化は再び
電流調節器の出力制御角指令信号レベルの変化として位
相角制御部により検知され、制御信号の制御遅れ角αが
交流側電圧制御部がない場合に比べて小さくなるので、
力率Ｃｏｇαは従来装置に比べて著しく改善され、これ
に伴なって系統力率も改善される。In addition, the change in the DC current due to the control of the transformed voltage is again detected by the phase angle control section as a change in the output control angle command signal level of the current regulator, and the control delay angle α of the control signal is detected by the AC side voltage control section. It will be smaller than without it, so
The power factor Cogα is significantly improved compared to the conventional device, and the system power factor is also improved accordingly.
以下この発ａＡを笑施例に基づいて説明する。 This aA will be explained below based on an example.
第１図はこの発明の実施例装置を示す回路構成図であり
、三相ブリッジ結線されたサイリスタ整流器を用いた場
合金的に示したものである。図において、１は降圧変圧
器であシ、その−次巻線２側にはタップ切換器１５Ａと
、これＫよって切換制御されるタップ選択器１５Ｂとか
らなる負荷時タップ切換装置１５（無電圧タップ切換装
置であってもよい）を持ち、直流巻線３の出力側はサイ
リスタ素子５を例えば三相ブリッジ結線されたサイリス
タ整流器（他の多相整流器であってもよい）４に接続さ
れる。７は整流器４の出力側に接続され、複数台直列接
続された電解装置であｐｌ例えば短絡スイッチ８によ〕
その運転台数が制御される。１１は出力直流電流１ｄの
検出器、１２はその設定器であシ、検出信号１１１と設
定信号１２１は比例積分形電流調節器１３に電流突き合
わせ方式で入力される。比例積分形電流調節器１３は比
例抵抗を介して定電流充電される積分コンデンサを持ち
、設定信号１２１に対する検出信号１１１の偏差信号電
流とほぼ等しく逆極性の電流が積分コンデンサに流れる
ことくより、積分コンデンサにあらかじめ充電されてい
た電荷が放電し、第２図にその出力電圧信号を制御角α
を縦軸に対応させて示すように制御角指令信号１３αと
して出力される。FIG. 1 is a circuit diagram showing a device according to an embodiment of the present invention, in which a three-phase bridge-connected thyristor rectifier is used. In the figure, reference numeral 1 is a step-down transformer, and on the side of the secondary winding 2 of the step-down transformer 1 there is a tap changer 15A and a tap selector 15B that is controlled by this K. The output side of the DC winding 3 connects the thyristor element 5 to, for example, a three-phase bridge-connected thyristor rectifier (which may also be another polyphase rectifier) 4 (which may be a tap switching device). . 7 is connected to the output side of the rectifier 4, and is an electrolytic device in which a plurality of units are connected in series.
The number of vehicles in operation is controlled. Reference numeral 11 is a detector for the output DC current 1d, 12 is a setting device thereof, and a detection signal 111 and a setting signal 121 are inputted to a proportional-integral type current regulator 13 in a current matching method. The proportional-integral current regulator 13 has an integrating capacitor that is charged with a constant current through a proportional resistor, and a current that is approximately equal to and opposite in polarity to the deviation signal current of the detection signal 111 with respect to the setting signal 121 flows through the integrating capacitor. The charge previously charged in the integrating capacitor is discharged, and the output voltage signal is changed to the control angle α as shown in Figure 2.
is output as a control angle command signal 13α as shown in correspondence with the vertical axis.
この制御角指令信号１３αは上限、下限二つのしきい値
１４Ａ、１４Ｂを有するコンパレータからなる交流側電
圧制御部１４に入力され、指令信号１６αの電圧レベル
が正側の上限しきい値レベルを超えたとき、タップ切換
器１５Ａに降圧タップへの切換を指示する制御信号を発
し、負側の下限しきい値レベルを下廻った場合に昇圧タ
ップへの切換を指示する制御信号を発する。This control angle command signal 13α is input to an AC side voltage control unit 14 consisting of a comparator having two upper and lower thresholds 14A and 14B, and the voltage level of the command signal 16α exceeds the positive upper threshold level. When this occurs, a control signal is issued to instruct the tap changer 15A to switch to a step-down tap, and when the voltage falls below the lower limit threshold level on the negative side, a control signal is issued to instruct the tap changer 15A to switch to a step-up tap.
一方、指令信号１３αは位相制御部２００制御信号発生
器１７に電圧検出器１６の検出電圧信号１６ｖとともに
入力され、検出電圧信号１６Ｖを同期信号としてサイリ
スタ素子５０位相制御に必要な制御信号１７Ｐが発生す
る。すなわち、制御信号発生器の動作をタイムチャート
第３図に示すように、検出電圧信号１６Ｖはこれに同期
した矩形波信号１７Ａに変換され、さらに鋸歯状波信号
１７Ｂに変換された後、第２図に示す制御角指令信号１
３αとの切合いが行われ、両者の交点で制御信号として
の矩形波パルス１７ｐが発生し、増幅回路１８でパワー
増幅された後、パルス伝送器１９を介してサイリスタ歴
流器４の各サイリスタ素子５のゲートに供給される。な
お、制御信号１７ｐは図ではＵ相の上下一対のサイリス
タアームＵ、Ｘに供給される一対の制御信号１７ｕ、１
７Ｘのみを示したが、これが各相電気角１２０’の位相
差をもって発生することにより、相互に電気角６０°位
相がずれた６個の制御信号（ゲートパルス）により各サ
イリスタ素子が制御されることはいうまでもないことで
あシ、制御角指令信号１３αの電圧レベルが増大すると
制御角αが大きくなシ、電圧レベルが低下すると制御角
αが小さくなる位相制御が行われる。On the other hand, the command signal 13α is input to the control signal generator 17 of the phase control unit 200 together with the detected voltage signal 16v of the voltage detector 16, and a control signal 17P necessary for phase control of the thyristor element 50 is generated using the detected voltage signal 16V as a synchronization signal. do. That is, as shown in the time chart of FIG. 3 for the operation of the control signal generator, the detected voltage signal 16V is converted into a rectangular wave signal 17A synchronized therewith, further converted into a sawtooth wave signal 17B, and then a second Control angle command signal 1 shown in the figure
3α, a rectangular wave pulse 17p is generated as a control signal at the intersection of the two, and after being power amplified by the amplifier circuit 18, it is transmitted to each thyristor of the thyristor current converter 4 via the pulse transmitter 19. Supplied to the gate of element 5. In addition, the control signal 17p is a pair of control signals 17u, 1 supplied to a pair of upper and lower thyristor arms U, X of the U phase in the figure.
Although only 7X is shown, since this is generated with a phase difference of 120' electrical angle for each phase, each thyristor element is controlled by six control signals (gate pulses) that are out of phase by 60 electrical degrees. Needless to say, phase control is performed in which when the voltage level of the control angle command signal 13α increases, the control angle α becomes large, and when the voltage level decreases, the control angle α becomes small.
上述のように構成された実施例装置において、直列電解
装［７の１台が短絡スイッチ８によって短絡されて運転
を中止すると、電流１ｄの増加は電流検出器１１で検知
され、電流調節器がこの電流増加を設定値に戻すための
電圧レベルの高い制御角指令信号１３αを出力する。１
３αの電圧レベルが交流電圧制御部１４の上限しきい値
１４Ａを超えると、タップ切換器１５Ａを降圧タップに
切換える信号が出され、これに基づいてタップ選択器１
５が動作して直流巻線６の出力電圧が低下し、まず直流
出力電圧Ｅｄの粗調整が行われる。In the embodiment apparatus configured as described above, when one of the series electrolyzers [7 is short-circuited by the short-circuit switch 8 and stops operating, the increase in the current 1d is detected by the current detector 11, and the current regulator is activated. A control angle command signal 13α with a high voltage level is outputted to return this current increase to the set value. 1
When the voltage level of 3α exceeds the upper limit threshold 14A of the AC voltage control unit 14, a signal is issued to switch the tap changer 15A to a step-down tap, and based on this, the tap selector 1
5 operates to lower the output voltage of the DC winding 6, and first, rough adjustment of the DC output voltage Ed is performed.
粗調整による直流電圧Ｅｄの低下は負荷電流１ｄの減少
として電流検出器１１を介して電流調節器１６に伝えら
れ、指令信号１６αの電圧レベルが低下するので、この
信号を受けてサイリスタ素子を位相制御する位相制御部
２０は、粗調整で電圧を下げ足りない分を微調整するだ
けですむことにな夛、当然のことながら制御角αは小さ
くなり、力率Ｃｏｓαを高いレベルに保持できるととも
に、ｆＩｓ路力重力率ぼす悪影響おも排除することがで
きる。The decrease in DC voltage Ed due to rough adjustment is transmitted to the current regulator 16 via the current detector 11 as a decrease in the load current 1d, and the voltage level of the command signal 16α decreases, so the thyristor element is phased in response to this signal. The controlling phase control section 20 only needs to coarsely adjust the voltage and make fine adjustments to compensate for the insufficient voltage, which naturally reduces the control angle α and allows the power factor Cosα to be maintained at a high level. , fIs can also eliminate the negative effects of road force and gravity.
なお降圧変圧器１次巻線２のタップ間隔は電解装置７０
台数に対応して決めることが好ましいことはいうまでも
ないことであ夕、負荷時タップ切換装置を用いれば、電
解装置全体の運転を持続した状態で電圧制御を自動的に
行うことができる。Note that the tap spacing of the primary winding 2 of the step-down transformer is the same as that of the electrolytic device 70.
Needless to say, it is preferable to determine the voltage depending on the number of electrolyzers, and if an on-load tap changer is used, voltage control can be automatically performed while the entire electrolyzer continues to operate.
この発明は前述のように、複数台直列接続された′ＮＬ
解装置の運転台数の変化に対応する電圧制御を、比しｕ
積分形電流調節器の出力制御角指令信号を交流制御部で
しきい値と比較して行う降圧変圧器の出力電圧制御と、
制御角指令信号を位相制御部で受けて行う位相制御とを
併用して行うよう構成した。その結果、運転台数の変化
によって生ずる各ｔｍ装置の電圧変化の大部分を交流制
御部で粗調整でき、粗調整で足９ない電圧の微調整を位
相制御部によって行うことができるので、制御角を小さ
な範囲に限定することが可能になシ、従来技術で問題と
なった制御角が大きくなることによる力率Ｃｏ ｓαの
低下および線路力率に及ぼす悪影響が排除され、したが
って電力事情の悪い地域や国々において電源設備容量に
支障を来たすことなく、直列ｖＬ解装置の運転台数の変
化に対応して電圧制御を行うことのできる電解用サイリ
スタ整流装置を提供することができる。As mentioned above, this invention is based on a plurality of 'NL's connected in series.
The voltage control that corresponds to the change in the number of operating equipment is compared.
output voltage control of a step-down transformer performed by comparing an output control angle command signal of an integral type current regulator with a threshold value in an AC control section;
It is configured to perform the phase control in combination with the phase control performed by receiving the control angle command signal in the phase control section. As a result, most of the voltage changes of each TM device that occur due to changes in the number of operating units can be roughly adjusted by the AC control unit, and the phase control unit can make fine adjustments to the voltage, which would not be possible with coarse adjustment. It is possible to limit the power factor to a small range, and the decrease in the power factor Cosα due to the increase in the control angle, which was a problem with the conventional technology, and the negative effect on the line power factor are eliminated, and therefore it is possible to eliminate the problem in areas with poor power conditions. It is possible to provide an electrolytic thyristor rectifier that can perform voltage control in response to changes in the number of series VL solution devices in operation without causing a problem in power supply capacity in countries such as the United States and other countries.
第１図はこの発明の実施例装置を示す概略回路構成図、
第２図は実施例装置における比例積分形電流調節器の出
力信号対制御角特性線図、第６図は実施例装置における
制御信号発生器の各部信号タイムチャートである。FIG. 1 is a schematic circuit configuration diagram showing an embodiment of the present invention;
FIG. 2 is an output signal vs. control angle characteristic diagram of the proportional-integral current regulator in the embodiment, and FIG. 6 is a time chart of signals of each part of the control signal generator in the embodiment.
Claims (1)
器を位相制御することにより、その負荷側に複数台直列
接続された電解装置の運転台数に対応して出力電圧およ
び電流を制御するものにおいて、前記降圧変圧器の交流
巻線側に設けられたタップ切換装置と、前記サイリスタ
整流器の出力電流検出信号とその設定信号とを突き合わ
せその偏差を積分した電圧信号を制御角指令信号として
出力する比例積分形電流調節器と、前記制御角指令信号
が所定のしきい値範囲を超えたとき前記タップ切換装置
にタップ切換を指令する交流側電圧制御部と、前記降圧
変圧器の端子電圧検出信号を同期信号として前記制御角
指令信号レベルに比例した制御角を有する制御信号を前
記サイリスタ整流器のゲート回路に向けて出力する位相
制御部とを備えたことを特徴とする電解用サイリスタ整
流装置。1) By controlling the phase of the thyristor rectifier placed on the DC winding side of the step-down transformer, the output voltage and current are controlled according to the number of electrolyzers connected in series on the load side. A tap switching device provided on the AC winding side of the step-down transformer compares the output current detection signal of the thyristor rectifier with its setting signal, and outputs a voltage signal obtained by integrating the deviation as a control angle command signal. a proportional-integral current regulator; an AC side voltage control section that instructs the tap switching device to switch taps when the control angle command signal exceeds a predetermined threshold range; and a terminal voltage detection signal of the step-down transformer. a phase control section that outputs a control signal having a control angle proportional to the control angle command signal level as a synchronization signal to a gate circuit of the thyristor rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63253111A JP2718958B2 (en) | 1988-10-07 | 1988-10-07 | Thyristor rectifier for electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63253111A JP2718958B2 (en) | 1988-10-07 | 1988-10-07 | Thyristor rectifier for electrolysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02101967A true JPH02101967A (en) | 1990-04-13 |
| JP2718958B2 JP2718958B2 (en) | 1998-02-25 |
Family
ID=17246652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63253111A Expired - Lifetime JP2718958B2 (en) | 1988-10-07 | 1988-10-07 | Thyristor rectifier for electrolysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2718958B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012157238A (en) * | 2011-01-24 | 2012-08-16 | Aeg Power Solutions Bv | Rectifier circuit having at least two operating points |
| AT526361B1 (en) * | 2022-12-21 | 2024-02-15 | Andritz Ag Maschf | Controllable rectifier arrangement for hydrogen electrolysis |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53135447A (en) * | 1977-04-28 | 1978-11-27 | Tokuyama Soda Kk | Method of controlling voltage in electric dialysing device |
-
1988
- 1988-10-07 JP JP63253111A patent/JP2718958B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53135447A (en) * | 1977-04-28 | 1978-11-27 | Tokuyama Soda Kk | Method of controlling voltage in electric dialysing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012157238A (en) * | 2011-01-24 | 2012-08-16 | Aeg Power Solutions Bv | Rectifier circuit having at least two operating points |
| AT526361B1 (en) * | 2022-12-21 | 2024-02-15 | Andritz Ag Maschf | Controllable rectifier arrangement for hydrogen electrolysis |
| AT526361A4 (en) * | 2022-12-21 | 2024-02-15 | Andritz Ag Maschf | Controllable rectifier arrangement for hydrogen electrolysis |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2718958B2 (en) | 1998-02-25 |
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