JPS6117214B2 - - Google Patents
Info
- Publication number
- JPS6117214B2 JPS6117214B2 JP53088982A JP8898278A JPS6117214B2 JP S6117214 B2 JPS6117214 B2 JP S6117214B2 JP 53088982 A JP53088982 A JP 53088982A JP 8898278 A JP8898278 A JP 8898278A JP S6117214 B2 JPS6117214 B2 JP S6117214B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- margin angle
- bridge
- rectifier
- commutation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 7
- 238000010304 firing Methods 0.000 description 19
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
- Rectifiers (AREA)
Description
【発明の詳細な説明】
本発明は、アルミ電解用電源などに使用される
制御整流装置で、3相ブリツジ制御整流器を複数
台並列接続し12相以上を構成している制御整流装
置の転流余裕角不足時の制御整流装置の保護方式
に関するものである。Detailed Description of the Invention The present invention is a controlled rectifier used in power supplies for aluminum electrolysis, etc., and is a controlled rectifier that connects multiple three-phase bridge control rectifiers in parallel to form 12 or more phases. This invention relates to a protection method for a controlled rectifier when the margin angle is insufficient.
制御整流装置が、逆変換動作を行なつている場
合、使用している制御整流素子のターンオフ特性
によりある一定の転流余裕角がないと転流失敗を
する。このため従来より転流余裕角を検出し転流
余裕角不足時には制御整流装置を保護している。 When the controlled rectifier performs a reverse conversion operation, commutation will fail unless there is a certain commutation margin angle due to the turn-off characteristics of the controlled rectifier used. For this reason, the commutation margin angle has been conventionally detected to protect the controlled rectifier when the commutation margin angle is insufficient.
第1図に従来から使用されている強制点孤方式
による転流余裕角不足時の制御整流装置の保護方
式のブロツク図を示す。 FIG. 1 shows a block diagram of a conventionally used forced ignition method to protect a controlled rectifier when commutation margin angle is insufficient.
第1図中1は制御整流素子のアノード、カソー
ド間の逆圧期間を検出する逆圧検出回路、2は逆
圧検出電流1からの逆圧期間信号が一定期間発生
するかどうかを検出する転流余裕角不足検出回
路、3は位相制御回路、4は位相制御回路3の点
孤指令により転流余裕角不足時の強制点孤パルス
(以下強点パルスと呼ぶ)を発生するタイミング
と相を決定し転流余裕角不足検出回路からの転流
余裕角不足信号により強点パルスを発生する強制
点孤パルス発生回路、5は位相制御回路3からの
点孤パルスと、転流余裕角不足検出回路2からの
転流余裕角不足信号のノツト信号とのアンド条件
によりオア素子6に信号を出すアンド素子、6は
アンド素子5からの正常時の点孤指令と、強点パ
ルス発生回路4からの強点パルスとのオア条件に
よりインタフエイス回路7へ点孤指令を送るオア
素子、7は制御回路からの点孤指令と制御整流素
子のゲートへの点孤パルス信号との間のインタフ
エイスである。 In Figure 1, 1 is a reverse pressure detection circuit that detects the reverse pressure period between the anode and cathode of the controlled rectifier, and 2 is a circuit that detects whether the reverse pressure period signal from the reverse pressure detection current 1 is generated for a certain period of time. A flow margin angle insufficient detection circuit, 3 a phase control circuit, and 4 a timing and phase for generating a forced firing pulse (hereinafter referred to as a strong point pulse) when commutation margin angle is insufficient according to a firing command from the phase control circuit 3; A forced firing pulse generation circuit determines and generates a strong point pulse based on a commutation margin angle shortage signal from the commutation margin angle shortage detection circuit, 5 is a firing pulse from the phase control circuit 3 and a commutation margin angle shortage detection circuit. An AND element outputs a signal to the OR element 6 based on the AND condition of the insufficient commutation margin angle signal from the circuit 2 and the NOT signal. 7 is an interface between the firing command from the control circuit and the firing pulse signal to the gate of the control rectifier. be.
正常時には位相制御回路3より点孤指令が発生
してアンド素子6、オア素子6、インタフエイス
7を介して制御整流素子のゲートに点孤信号が与
えられる。異常時、すなわ転流余裕角不足検出回
路2より転流余裕角不足信号が発生すると、アン
ド素子5により位相制御回路3より点孤指令をカ
ツトすると共に強点パルス発生回路4より強制点
孤パルスを正常時に転流動作を行なおうとした相
の次の相に発生させる。すなわち、交流電源側の
R相、S相、T相に接続されている制御整流素子
の相の高圧側をそれぞれU相、V相、W相、低圧
側をそれぞれX相、Y相、Z相と呼ぶと、正常時
にはU,Z,V,X,W,Yの順に点孤させ高圧
側はUからV、VからW、WからUの順に転流さ
せ、低圧側はXからY、YからZ、ZからXの順
に転流させているが、例えばV相からW相への転
流時に転流余裕角不足が発生したとすると強点パ
ルスをU相に与え、U相とX相が通電状態とな
り、いわゆるバイパスペア(以下BPPと称す)状
態となる。この後一定時間をおいて転流余裕角不
足検出回路の出力をオフすると、位相制御回路3
から点孤指令がアンド素子5を通つて発生し正常
状態にもどる。 During normal operation, a firing command is generated from the phase control circuit 3, and a firing signal is applied to the gate of the control rectifying element via the AND element 6, the OR element 6, and the interface 7. When an abnormality occurs, that is, when a commutation margin angle shortage signal is generated from the commutation margin angle shortage detection circuit 2, the AND element 5 cuts off the firing command from the phase control circuit 3, and at the same time, the forced firing is performed from the strong point pulse generation circuit 4. A pulse is generated in the phase following the phase in which commutation operation is attempted during normal operation. That is, the high voltage side of the phases of the control rectifier connected to the R phase, S phase, and T phase of the AC power supply side are connected to the U phase, V phase, and W phase, respectively, and the low voltage side is connected to the X phase, Y phase, and Z phase, respectively. Under normal conditions, U, Z, V, X, W, and Y are ignited in this order, and the high pressure side is commutated in the order of U to V, V to W, and W to U, and the low pressure side is commutated from X to Y, and Y. The current is commutated in the order of Z to Z, and Z to X. For example, if a commutation margin angle shortage occurs when commutating from V phase to W phase, a strong point pulse is applied to U phase, and the U phase and becomes energized, resulting in a so-called bypass pair (hereinafter referred to as BPP) state. After that, if the output of the commutation margin angle insufficient detection circuit is turned off after a certain period of time, the phase control circuit 3
A firing command is generated through the AND element 5, and the normal state is restored.
以上は、3相ブリツジの制御整流器1つで構成
されている6相制御整流装置の余裕角不足時の保
護方式である。ところで第2図に3相ブリツジ制
御整流器11A,11Bの2台並列接続した12相
制御整流装置を示す。以下の説明は簡単のために
12相について行なうが2つ以上の複数個であれば
同様に説明できる。 The above is a protection method when the margin angle is insufficient for a six-phase controlled rectifier configured with one three-phase bridge controlled rectifier. By the way, FIG. 2 shows a 12-phase control rectifier in which two three-phase bridge control rectifiers 11A and 11B are connected in parallel. The following explanation is for simplicity
The explanation will be given for 12 phases, but the same explanation can be given for two or more phases.
第2図中9は交流母線、10A,10Bは交流
母線から受電する整流器用変圧器、11A,11
Bは3相ブリツジ制御整流器、12は負荷であ
る。12相の制御整流装置において前に述べた強点
パルス方式の保護方式を使用すると、例えば第2
図の3相ブリツジ制御整流器11A(11Aを進
み位相側と仮定する)。が転流余裕角が不足し強
点パルスが発生したとすると、転流失敗側の3相
ブリツジ制御整流器11A(以下Aブリツジと称
す。)はBPPとなり出力電圧零となるが、健全な
3相ブリツジ制御整流器11B(以下Bブリツジ
と称す。)は逆変換動作の状態が継続する。この
ときの相電圧波形及び直流電圧波形を第3図に示
す。図から明らかなようにBブリツジ11Bの直
流電圧がAブリツジ11Aよりも低いため負荷電
流はAブリツジ11Aに集中する。このため、一
定時間後Aブリツジ11Aを復帰されようとした
とき転流重なり角が増大し、再び転流失敗すると
いう不具合がある。またBブリツジはオフしAブ
リツジのみBPP状態が続くと、負荷電流はAブリ
ツジだけで流れ続けるため大きなインダクタンス
負荷の場合は素子を破壊する恐れがある。 In Figure 2, 9 is an AC bus, 10A, 10B are rectifier transformers that receive power from the AC bus, 11A, 11
B is a three-phase bridge control rectifier, and 12 is a load. Using the previously described strong point pulse protection scheme in a 12-phase controlled rectifier, e.g.
The three-phase bridge control rectifier 11A shown in the figure (assuming 11A is on the leading phase side). If the commutation margin angle is insufficient and a strong point pulse occurs, the three-phase bridge control rectifier 11A (hereinafter referred to as A bridge) on the commutation failure side becomes BPP and the output voltage becomes zero, but the normal three-phase The bridge control rectifier 11B (hereinafter referred to as the B bridge) continues to perform inverse conversion operation. The phase voltage waveform and DC voltage waveform at this time are shown in FIG. As is clear from the figure, since the DC voltage of the B bridge 11B is lower than that of the A bridge 11A, the load current concentrates on the A bridge 11A. Therefore, when attempting to return the A-bridge 11A after a certain period of time, the commutation overlap angle increases and the commutation fails again. Furthermore, if the B bridge is turned off and only the A bridge remains in the BPP state, the load current will continue to flow only through the A bridge, which may destroy the element in the case of a large inductance load.
本発明の目的は、3相ブリツジ制御整流装置を
複数台並列接続し、12相以上を構成している制御
整流装置において、ある特定の3相ブリツジ整流
器が転流余裕角不足となつた場合に制御整流装置
をすみやかに保護し、制御整流装置を継続運転す
ることができるようにする制御整流装置の保護方
式を提供することである。 The purpose of the present invention is to solve the problem when a certain three-phase bridge rectifier becomes insufficient in commutation margin angle in a controlled rectifier in which a plurality of three-phase bridge control rectifiers are connected in parallel to form 12 or more phases. It is an object of the present invention to provide a protection method for a controlled rectifier that promptly protects the controlled rectifier and enables continuous operation of the controlled rectifier.
以下本発明を図面を参照して説明する。 The present invention will be explained below with reference to the drawings.
第4図に本発明の一実施例の構成図を示す。図
中第1図のブロツクと同一番号のものは同一機能
を示す。第4図中67は転流余裕角検出回路2か
らの転流余裕角不足信号と並列接続された他の制
御整流器からの転流余裕角不足信号とのオア条件
をとるオア素子、8は位相制御回路3の点孤指令
により転流余裕角不足時の強点パルス発生相と、
バイパスペア解除のための点孤相を決定し、オア
素子67からの信号で強点パルスを発生し一定時
間後にバイパスペア解除パルスを発生する転流余
裕角不足時ロジツク制御回路である。 FIG. 4 shows a configuration diagram of an embodiment of the present invention. Blocks in the figure with the same numbers as those in FIG. 1 indicate the same functions. In Fig. 4, 6 and 7 are OR elements that take an OR condition between the commutation margin angle shortage signal from the commutation margin angle detection circuit 2 and the commutation margin angle shortage signal from another control rectifier connected in parallel; A strong point pulse generation phase when the commutation margin angle is insufficient due to the firing command of the phase control circuit 3,
This logic control circuit determines the ignition phase for bypass pair release, generates a strong point pulse with the signal from the OR element 67 , and generates a bypass pair release pulse after a certain period of time when the commutation margin angle is insufficient.
次に本発明の作用について説明する。第2図に
示したように3相ブリツジ制御整流器を2台並列
接続し12相の制御整流装置を構成している主回路
に対し、それぞれの制御整流器が第3図に示した
よう転流余裕角不足時の保護装置を持つている。
何らかの不具合によりAブリツジ11Aの転流余
裕角不足検出回路2が動作すると、オア素子67
を通つて、アンド素子51〜56に信号が送ら
れ、位相制御電流3からの信号をカツトすると同
時に該転流余裕角不足信号は転流余裕角不足時ロ
ジツク制御回路8に送られ、強点パルスが発生
し、Aブリツジ11AはBPP状態となる。また同
時に該転流余裕角不正信号はBブリツジ11Bの
転流余裕角不足時保護装置のオア素子67に送ら
れ、Bブリツジ11BもBPP状態となる。その
後、適切な時間遅の後それぞれの転流余裕角不足
時ロジツク制御回路8よりBPPを解除するよう点
孤パルスを発生させると共に転流余裕角不足信号
をオフすると、アンド素子51〜56を通つて再
び位相制御回路3の点孤指令がオア素子61〜6
6に送られ正常運転にもどる。 Next, the operation of the present invention will be explained. As shown in Figure 2, two 3-phase bridge control rectifiers are connected in parallel to form a 12-phase controlled rectifier, and each control rectifier has a commutation margin as shown in Figure 3. It has a protection device in case of insufficient horn.
When the commutation margin angle insufficient detection circuit 2 of the A bridge 11A operates due to some kind of malfunction, the OR element 6 7
A signal is sent to the AND elements 5 1 to 5 6 through the circuit, and the signal from the phase control current 3 is cut off. At the same time, the commutation margin angle shortage signal is sent to the commutation margin angle shortage logic control circuit 8. A strong point pulse is generated and the A bridge 11A enters the BPP state. At the same time, the commutation margin angle incorrect signal is sent to the OR element 67 of the commutation margin insufficient protection device of the B bridge 11B, and the B bridge 11B also enters the BPP state. Thereafter, after an appropriate time delay, each commutation margin angle insufficient logic control circuit 8 generates a firing pulse to release BPP and turns off the commutation margin angle insufficient signal, and AND elements 5 1 to 5 6 The firing command of the phase control circuit 3 passes through the OR elements 6 1 to 6 again.
6 and returns to normal operation.
第5図はAブリツジ11Aの方が進み位相側と
仮定し、本発明の動作を行つた場合の相電圧波形
と直流電圧波形である。V1相からW1相に転流時
に転流余裕角不足になつた場合でありこの時点で
転流余裕角不足信号が発生し、Aブリツジ11
A、Bブリツジ11BのU1相、U2相に強点パル
スが発生する。その後にY1相、Y2相にBPP解除
パルスを発生させ正常運転にもどつている。第5
図ではBPP解除パルスをAブリツジ11A、Bブ
リツジ11Bの点孤角が同一となるよう制御して
いるが、転流余裕角不足信号の発生時点から一定
の適切な時間遅れをもたせてAブリツジ11A,
Bブリツジ11Bに同時に発生されても同一の効
果が得られる。 FIG. 5 shows the phase voltage waveform and DC voltage waveform when the operation of the present invention is performed, assuming that the A bridge 11A is on the leading phase side. This is the case when the commutation margin angle becomes insufficient during commutation from the V 1 phase to the W 1 phase, and at this point, a commutation margin angle shortage signal is generated, and the A bridge 11
Strong point pulses are generated in the U1 phase and U2 phase of the A and B bridges 11B. After that, a BPP release pulse was generated in the Y1 phase and Y2 phase, and normal operation was restored. Fifth
In the figure, the BPP release pulse is controlled so that the firing angles of the A bridge 11A and the B bridge 11B are the same. ,
The same effect can be obtained even if they are generated simultaneously in the B bridge 11B.
また第4図の転流余裕角不足時ロジツク制御回
路8を、第1図に示した強制点孤パルス発生回路
4に置きかえて、強点パルス発生後、ある適切な
時間後に転流余裕角不足信号をオフし、位相制御
回路からの点孤指令によりBPPを解除することも
できる。この場合BPP解除時の点孤位相は位相制
御回路により決定される。 In addition, the commutation margin angle shortage logic control circuit 8 shown in FIG. 4 is replaced with the forced firing pulse generation circuit 4 shown in FIG. BPP can also be canceled by turning off the signal and receiving a firing command from the phase control circuit. In this case, the firing phase when BPP is released is determined by the phase control circuit.
以上の説明により明らかなように、3相ブリツ
ジ制御整流器を複数個並列に接続し12相以上を構
成している制御整流装置において、ある特定の3
相ブリツジ制御整流器が転流余裕角不足となつた
ら該制御整流器に強制点孤パルスを発生させ、
BPPに投入すると共に他の健全な3相ブリツジ制
御整流器にも強点パルスを発生させBPPに投入
し、その後適切な時間の後にBPPを解除すると、
転流余裕角が不足した制御整流器に電流が集中す
ることなくまた運転停止を行なうことなく正常状
態に復帰させることができ、システムの信頼性向
上がはかられかつ経済的な制御整流器の設計が可
能となるので、その効果は大である。 As is clear from the above explanation, in a controlled rectifier in which a plurality of three-phase bridge control rectifiers are connected in parallel to form 12 or more phases, a certain
When the phase bridge control rectifier becomes insufficient in commutation margin angle, a forced ignition pulse is generated in the control rectifier,
When the BPP is turned on and the other healthy three-phase bridge control rectifiers are also generated a strong point pulse and turned on to the BPP, and then the BPP is released after an appropriate time,
It is possible to restore the normal state to a controlled rectifier with insufficient commutation margin angle without concentrating current or shutting down the operation, improving system reliability and designing an economical controlled rectifier. Since it is possible, the effect is great.
第1図は従来使用されている転流余裕角不足時
の制御整流装置の保護方式のブロツク図、第2図
は3相ブリツジ制御整流器を2台並列接続し12相
を構成している制御整流装置の構成図、第3図は
従来の保護方式を行なつた場合の12相制御整流装
置の相電圧と、直電圧波形図、第4図は本発明の
制御整流装置の保護方式の一実施例のブロツク
図、第5図は第4図に示した本発明の一実施例を
行なつた場合の相電圧と直流電圧波形図である。
1…逆圧検出回路、2…転流余裕角不足検出回
路、3…位相制御回路、4…強制点孤パルス発生
回路、5,51〜56…アンド素子、6,61〜
67…オア素子、7…インタフエイス、8…転流
余裕角不足時ロジツク制御回路、9…交流母線、
10―1,10―2…整流器用変圧器、11A,
11B…6相ブリツジ制御整流器、12…負荷。
Figure 1 is a block diagram of a conventional protection system for a controlled rectifier when commutation margin angle is insufficient, and Figure 2 is a controlled rectifier in which two 3-phase bridge control rectifiers are connected in parallel to form 12 phases. The configuration diagram of the device, Figure 3 shows the phase voltage and direct voltage waveform of the 12-phase controlled rectifier when the conventional protection method is used, and Figure 4 shows one implementation of the protection method of the controlled rectifier of the present invention. An example block diagram, FIG. 5, is a phase voltage and DC voltage waveform diagram when the embodiment of the present invention shown in FIG. 4 is carried out. DESCRIPTION OF SYMBOLS 1... Reverse pressure detection circuit, 2... Commutation margin angle deficiency detection circuit, 3... Phase control circuit, 4... Forced firing pulse generation circuit, 5, 5 1 to 5 6 ... AND element, 6, 6 1 to
6 7 ...OR element, 7...Interface, 8...Logic control circuit when commutation margin angle is insufficient, 9...AC bus,
10-1, 10-2... Rectifier transformer, 11A,
11B...6-phase bridge control rectifier, 12...Load.
Claims (1)
し12相以上を構成する制御整流装置において、い
ずれかの3相ブリツジ制御整流器の転流余裕角が
不足した時、該3相ブリツジ制御整流器をバイパ
スペアに投入すると共に他の健全なる3相ブリツ
ジ制御整流器もバイパスペアに投入し、しかる後
バイパスペアを解除するようにしたことを特徴と
する制御整流装置の保護方式。1. In a controlled rectifier in which multiple 3-phase bridge control rectifiers are connected in parallel to form 12 or more phases, when the commutation margin angle of any 3-phase bridge control rectifier is insufficient, the 3-phase bridge control rectifier is A protection method for a controlled rectifier, characterized in that the control rectifier is connected to a bypass pair, and another healthy three-phase bridge control rectifier is also connected to the bypass pair, and then the bypass pair is released.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8898278A JPS5517249A (en) | 1978-07-21 | 1978-07-21 | Controlled rectifier protecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8898278A JPS5517249A (en) | 1978-07-21 | 1978-07-21 | Controlled rectifier protecting system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5517249A JPS5517249A (en) | 1980-02-06 |
JPS6117214B2 true JPS6117214B2 (en) | 1986-05-06 |
Family
ID=13957995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8898278A Granted JPS5517249A (en) | 1978-07-21 | 1978-07-21 | Controlled rectifier protecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5517249A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0266709U (en) * | 1988-11-02 | 1990-05-21 |
-
1978
- 1978-07-21 JP JP8898278A patent/JPS5517249A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5517249A (en) | 1980-02-06 |
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