FR2733256A1 - Self=regulating rectifier for cathodic protection of metal structures - Google Patents

Self=regulating rectifier for cathodic protection of metal structures Download PDF

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Publication number
FR2733256A1
FR2733256A1 FR9504965A FR9504965A FR2733256A1 FR 2733256 A1 FR2733256 A1 FR 2733256A1 FR 9504965 A FR9504965 A FR 9504965A FR 9504965 A FR9504965 A FR 9504965A FR 2733256 A1 FR2733256 A1 FR 2733256A1
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FR
France
Prior art keywords
self
cathodic protection
metal structures
regulating rectifier
transformer
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Granted
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FR9504965A
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French (fr)
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FR2733256B1 (en
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Individual
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Priority to FR9504965A priority Critical patent/FR2733256B1/en
Publication of FR2733256A1 publication Critical patent/FR2733256A1/en
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Publication of FR2733256B1 publication Critical patent/FR2733256B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04—Controlling or regulating desired parameters

Abstract

The rectifier, designed to provide protection for metal pipes, bridges and other structures, is regulated by the prim. circuit of a transformer (1) through an opto triac with a high insulating capacity (2), while a reference electrode provides the potential of the pipe (3) to an electronic unit (4) controlling the opto triac trigger.

Description

La présente invention concerne un redresseur auto régulé pour la protection cathodique d'ouvrages métalliques. Voir l'ouvrage de protection cathodique guide pratique, Editions Technip.The present invention relates to a self-regulated rectifier for the cathodic protection of metallic structures. See the cathodic protection book, practical guide, Editions Technip.

Jusqu'à présent on utilise (pour la protection cathodique d'ouvrages métalliques, canalisations, ponts, . ..ect) des redresseurs qui fixent un potentiel négatif par rapport à la terre, ceux ci délivrent une tension (Alternatif redressé). Ces redresseurs sont généralement composés d'un rhéostat, un transformateur et un pont diode. Le rhéostat servant à régler la tension de sortie. D'autres redresseurs plus sophistiqués sont auto-régulés. C'est à dire que la tension de sortie est asservie par une électrode de référence donnant le potentiel de la canalisation. Dans les redresseurs autorégulés nous trouvons 2 technologies différentes 1") La régulation se fait au secondaire du transformateur par un pont de thyristors, I'électrode associée à une électronique commandant les gâchettes des thyristors.Up to now, rectifiers are used (for cathodic protection of metal structures, pipes, bridges, etc.) which fix a negative potential with respect to the ground, these deliver a voltage (rectified AC). These rectifiers are generally composed of a rheostat, a transformer and a diode bridge. The rheostat used to adjust the output voltage. Other more sophisticated rectifiers are self-regulating. That is to say that the output voltage is controlled by a reference electrode giving the potential of the pipe. In self-regulating rectifiers we find 2 different technologies 1 ") The regulation is done at the transformer secondary by a thyristor bridge, the electrode associated with an electronics controlling the triggers of the thyristors.

2") La régulation se fait par des transistors après un pont de diode, I'électrode associé à une électronique commandant les bases des transistors
Ces 2 Technologies employées sont très sensibles à la foudre et aux courants vagabonds qui détériorent les jonctions des thyristors et transistors, rendant hors services les redresseurs autorégulés.2 ") The regulation is done by transistors after a diode bridge, the electrode associated with electronics controlling the bases of the transistors
These 2 Technologies used are very sensitive to lightning and stray currents which deteriorate the junctions of thyristors and transistors, rendering self-regulating rectifiers out of service.

La présente invention porte sur une 3ème Technologie.The present invention relates to a 3rd Technology.

Sa régulation qui se fait au primaire du transformateur G par l'intermédiaire d'un opto triac à fort pouvoir d'isolement (2), I'électrode de référence donnant le potentiel de la canalisation 0 associée à une électronique (!) commandant la gâchette de l'opto triac (2). Its regulation, which takes place in the primary of transformer G via a triac opto with high insulation power (2), the reference electrode giving the potential of line 0 associated with electronics (!) Controlling the triac opto trigger (2).

Le reste du redresseur auto régulé (Transformateur et diodes) est de même technologie qu'un redresseur conventionnel qui a fait ses preuves de robustesse. The rest of the self-regulated rectifier (Transformer and diodes) is of the same technology as a conventional rectifier which has proven its robustness.

Claims (1)

REVENDICATIONS lo) Dispositif de redresseur auto-régulé pour la protection cathodique est caractérisé par lo) Self-regulating rectifier device for cathodic protection is characterized by Sa régulation qui se fait au primaire du transformateur # par l'intermédiaire d'un opto triac à fort pouvoir d'isolement (2), l'électrode de référence donnant le potentiel de la canalisation (3) associée à une électronique (4) commandant la gâchette de l'opto triac 3 Its regulation which is done at the transformer # primary via an opto triac with high insulation power (2), the reference electrode giving the potential of the pipe (3) associated with electronics (4) controlling the trigger of the opto triac 3
FR9504965A 1995-04-24 1995-04-24 SELF-REGULATED RECTIFIER FOR CATHODIC PROTECTION Expired - Lifetime FR2733256B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9504965A FR2733256B1 (en) 1995-04-24 1995-04-24 SELF-REGULATED RECTIFIER FOR CATHODIC PROTECTION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9504965A FR2733256B1 (en) 1995-04-24 1995-04-24 SELF-REGULATED RECTIFIER FOR CATHODIC PROTECTION

Publications (2)

Publication Number Publication Date
FR2733256A1 true FR2733256A1 (en) 1996-10-25
FR2733256B1 FR2733256B1 (en) 1998-02-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9504965A Expired - Lifetime FR2733256B1 (en) 1995-04-24 1995-04-24 SELF-REGULATED RECTIFIER FOR CATHODIC PROTECTION

Country Status (1)

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FR (1) FR2733256B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2172479A1 (en) * 2001-03-13 2002-09-16 Fundacion Cidetec Metal electrodeposition via constant potential reference electrode comprises D.C. processing, with dissolving of anode metal and optimization of potential

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053532A (en) * 1979-06-13 1981-02-04 Dionex Corp Power supply
US5077486A (en) * 1988-03-21 1991-12-31 Gary Marson Power supply for cathodic protection system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053532A (en) * 1979-06-13 1981-02-04 Dionex Corp Power supply
US5077486A (en) * 1988-03-21 1991-12-31 Gary Marson Power supply for cathodic protection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2172479A1 (en) * 2001-03-13 2002-09-16 Fundacion Cidetec Metal electrodeposition via constant potential reference electrode comprises D.C. processing, with dissolving of anode metal and optimization of potential

Also Published As

Publication number Publication date
FR2733256B1 (en) 1998-02-06

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