CN105337512A - Large-power bidirectional enforced drainage electric power apparatus - Google Patents
Large-power bidirectional enforced drainage electric power apparatus Download PDFInfo
- Publication number
- CN105337512A CN105337512A CN201510801467.0A CN201510801467A CN105337512A CN 105337512 A CN105337512 A CN 105337512A CN 201510801467 A CN201510801467 A CN 201510801467A CN 105337512 A CN105337512 A CN 105337512A
- Authority
- CN
- China
- Prior art keywords
- power
- supply device
- current
- output
- unit
- 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.)
- Pending
Links
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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
- H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration with control circuit
- H02M7/1626—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration with control circuit with automatic control of the output voltage or current
-
- 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
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a large-power bidirectional enforced drainage electric power apparatus, comprising an MCU (microprogrammed control unit) singlechip as well as a low-current output unit, a positive polarity output triggering unit, a negative polarity output triggering unit, a data collection isolation conversion module, a foreign communication interface, a keyboard and operation switch, a liquid crystal display and an acousto-optic alarming device which are connected with the MCU singlechip respectively, wherein the positive polarity output triggering unit and the negative polarity output triggering unit are respectively connected with a constant-potential current transformer of a rectifying circuit; the low-current output unit is connected with the commutation circuit of the rectifying circuit; the data collection isolation conversion module is connected with an anti-thunder direct current interference resisting unit of the rectifying circuit. The large-power bidirectional enforced drainage electric power apparatus has the beneficial effects that the power of the drainage electric power apparatus is greatly improved, and constant potential control range is greatly enlarged; the apparatus has standby monitoring and automatic triggering starting functions; the polarity of the output voltage can be automatically transformed along with the polarity of a ground potential; the apparatus has an intelligenization function and is strong in interference capability.
Description
Technical field
The present invention relates to a kind of great power bidirectional forced drainage power-supply device.
Background technology
During HVDC (High Voltage Direct Current) transmission system employing one pole-the earth operational mode, direct current grounding pole place has the electric current up to a few kiloampere to enter ground.So large electric current, may produce interference to the buried oil and gas pipes in tens kilometers of kilometer range even up to a hundred and station equipment: the normal operation affecting cathodic protection system; The stray electrical current flowing into, flow out can be formed on buried pipeline, the corrosion failure of pipeline can occur within outflow position very short time; Greatly can increase the overprotection risk of pipeline at inflow position, cause the safety problems such as anticorrosive coating peeling, tubing hydrogen embrittlement and hydrogen damage.
For avoiding DC influence, corrosion is produced to pipeline; the heavy current impact in short-term that suppression pipeline is subject to the line residual current of DC transmission system one pole and produces; pressure correction need be carried out to the large-scale potential shift of pipeline; guarantee the normal operation of cathodic protection power-supply device under strong dc disturbance state, powerful two-way forced drainage power-supply device (hereinafter referred to as " drainage power-supply device ") need be used.
The cathodic protection potentiostat that current oil and gas pipes is conventional, be a kind of rectifier of automatic control, its output variable can regulate, and is stablized the DC suppling equipment of energising point energising current potential by closed-loop system.It is mainly applicable to the place that structures/electrolytical current potential often fluctuates.The operation principle of potentiostat, is the structures/electrolytical current potential signal source gathering a standard with reference electrode, sends the signal collected to comparison amplifier, and after comparing amplification, the output current of adjustment major loop, maintains a constant current potential.
If the heavy current impact being in short-term used for by existing cathodic protection potentiostat suppressing pipeline to be subject to the line residual current of DC transmission system one pole and producing, pressure correction is carried out to the large-scale potential shift of pipeline, will exist following not enough:
1, single device power is too little.Have case to show, the line residual current of DC transmission system one pole can produce the earth current of 3000A, pipeline can produce about up to the current potential of+200V.Conventional potentiostat power usually within 1000W (20A/50V), the pipeline in strong jamming district need lay along the line tens of, even the potentiostat of up to a hundred can realize forcing correction, this is difficult to carry out in engineering.
2, constant potential control range is limited.When carbon steel and low alloy steel cathodic protection adopts Cu-CuSO
4during reference electrode, the constant potential control range of conventional potentiostat is 0 ~-3V.Once the current potential that pipeline is subject to stray electrical current interference and produces exceedes this scope, conventional potentiostat will convert constant current working method automatically to, is difficult to the protection realizing normal table.
3, do not possess await orders monitoring with automatically trigger start-up performance.The line residual current of DC transmission system one pole runs has generation and the duration is uncertain, the feature such as heavy current in short-term, and under the most of the time, pipeline disturbs without stray electrical current.This just needs cathodic protection power-supply device to be in monitoring state of awaiting orders for a long time, once there is big current interference automatically can trigger startup.Conventional potentiostat does not possess this function.
4, equipment antijamming capability is not enough.Conventional potentiostat has anti-interchange 50Hz, 30V power frequency and continues interference function, and between reference line, zero line, moment can bear 4J, 1500V overvoltage.The duration of DC transmission system generation one pole line residual current can reach a few hours, pipeline can produce about up to the current potential of+200V.Obviously there is the problem of anti-stray current interference performance deficiency under such conditions in conventional potentiostat.
5, dipole inversion ability is not possessed.During DC transmission system generation one pole line residual current, the polarity of earth current is random, and both may be that positive pole enters ground, also may be that negative pole enters ground.Therefore, if will carry out pressure correction to pipeline potential shift, cathodic protection power-supply device output current polarity should be changed according to the polarity of interference source.The constant potential polarity of conventional potentiostat is negative, does not possess dipole inversion ability.
For solving the above-mentioned deficiency of conventional cathodes protection potentiostat, special research and development great power bidirectional forced drainage power-supply device, forces correction for the pipeline cathode protection current potential realized in DC transmission system one pole line residual current jamming coverage.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of great power bidirectional forced drainage power-supply device.
The technical solution adopted in the present invention is: a kind of great power bidirectional forced drainage power-supply device, comprises that MCU single-chip microcomputer exports trigger element with the small area analysis output unit be connected with MCU single-chip microcomputer respectively, positive polarity, negative polarity exports trigger element, data acquisition isolated variable module, externally communication interface, keyboard and console switch, liquid crystal display and acoustic-optic alarm; Described positive polarity exports trigger element and is connected with the constant potential current transformer of rectification circuit respectively with negative polarity output trigger element; Described small area analysis output unit is connected with the commutation circuit of rectification circuit; Described data acquisition isolated variable module is connected with the anti-DC influence unit of the lightning protection of rectification circuit.
Compared with prior art, good effect of the present invention is:
1, drainage power-supply device power significantly improves.Conventional cathodic protection with potentiostat power usually within 1000W (20A/50V).The drainage power-supply device that the invention proposes is by using SCR rectification circuit, and adopt silicon controlled rectifier constant potential current transformer as power-ourput device, transformer adopts the oily type of cooling, achieves the stable output of maximum power 20kW.Meanwhile, the lifting of combinative prevention grade, meets the requirement that outdoor installation uses.
The heavy current impact in short-term produced for the line residual current of DC transmission system one pole, drainage power-supply device can carry out pressure correction to the large-scale potential shift of pipeline, thus under guaranteeing strong dc disturbance state, cathodic protection system normally runs.
2, constant potential control range significantly expands.The constant potential control range of conventional potentiostat is 0 ~-3V, once the current potential that pipeline is subject to stray electrical current interference and produces exceedes this scope, will automatically convert constant current working method or disorderly closedown to.Output voltage range, by using SCR rectification circuit, is extended to-200V ~+200V, and can regulates continuously by the drainage power-supply device that the invention proposes.
3, possess await orders monitoring with automatically trigger start-up performance.It is small probability event that the line residual current of DC transmission system one pole runs, and under the most of the time, pipeline disturbs without stray electrical current, and the magnitude of current needed for beam cathode protection is only in the scope of several amperes.The drainage power-supply device that the invention proposes is provided with silicon controlled rectifier and small area analysis exports two cover output units.Under normal circumstances, power-supply device runs small area analysis output unit, and the data acquisition circuit of singlechip chip design will detect pipe/earth potential.When pipeline is subject to strong dc interference, the pipe/earth potential arithmetic average of the multiple controlling of sampling point of drainage power-supply device, just in-0.85V or when being defeated by-1.5V, automatically switches to silicon controlled rectifier output unit operational mode by singlechip chip, carries out High-current output.
4, the polarity of output voltage can be changed automatically with the polarity of pipe to soil potential.The constant potential control range of conventional potentiostat is 0 ~-3V, and the constant polarity of output voltage is negative.During DC transmission system generation one pole line residual current, the polarity of earth current is random.Therefore, if will carry out pressure correction to pipeline potential shift, drainage power-supply device output current polarity should be changed according to the polarity of interference source.The drainage power-supply device that the invention proposes adopts bridge rectifier topological structure, can according to the needs of actual output voltage polarity, by adopting singlechip chip to carry out Intelligent treatment, the triggering signal of automatic switchover silicon-controlled device, realize the reversing of output voltage.
5, intelligent functions is possessed.Conventional potentiostat mostly is mechanical type, can not realize intelligent management operation.The drainage power-supply device that the invention proposes adopts single-chip microcomputer (MCU) technology, utilize online real-time control computer, realize output voltage dipole inversion, pipe/earth potential awaits orders monitoring and automatically trigger the functions such as startup, data acquisition, Long-distance Control.Have that user-friendly for operation, program control ability is strong, dependable performance, be easy to the advantages such as expansion.
6, antijamming capability is strong.Relative to conventional potentiostat, the drainage power-supply device turnover cable that the invention proposes all has carried out anti-lightning strike overvoltage protection, is provided with the power surge protector of corresponding specification.Prevent the accidental damage of drainage power-supply device under strong curcent surge state.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is drainage power-supply device functional-block diagram;
Fig. 2 is bridge rectifier topological structure schematic diagram;
Fig. 3 is ac input end surge protector scheme of installation;
Fig. 4 is DC output end surge protector scheme of installation.
Embodiment
A kind of powerful two-way forced drainage power-supply device, as shown in Figure 1.Main body comprises: Based Intelligent Control, information exchange and rectification circuit three part, slave part comprises keyboard and console switch, liquid crystal display and sound and light alarm.
The core of intelligent control part is MCU single-chip microcomputer (MicroControllerUnit), also comprises small area analysis output unit, positive polarity exports trigger element, negative polarity exports trigger element three unit.MCU single-chip microcomputer receives the electronic signal of message exchange, accordingly small area analysis output unit, positive polarity output trigger element, negative polarity is exported to trigger element three unit and sends instruction, and then realize the control to the element of rectification circuit.
Information exchange part comprises data acquisition isolated variable module, externally communication interface.Direct voltage isolating transmitter module converts the standard output signals of isolating with input signal in proportion to the d. c. voltage signal by reference electrode and voltmeter collection, as the important foundation information of MCU single-chip microcomputer.Meanwhile, the drainage power-supply device status data of MCU single-chip microcomputer record can externally transmit by external communication interface in real time.
The core of rectifier circuit portion is constant potential current transformer, also comprises lightning protection unit, commutation circuit, the anti-DC influence unit of lightning protection three unit.Drainage power-supply device adopts silicon controlled rectifier constant potential current transformer as power-ourput device.AC power input side, DC output side all addition of lightning protection unit, guarantee the anti-strong curcent surge performance of equipment.Positive polarity exports trigger element and negative polarity and exports trigger element and is connected with constant potential current transformer respectively, and MCU single-chip microcomputer can to align in time according to the different potentials signal gathered/and negative polarity exports trigger element and sends instruction, the output polarity of control constant potential current transformer.Small area analysis output unit is connected with commutation circuit, and when needs equipment small-power exports, MCU single-chip microcomputer sends instruction to small area analysis output unit, controls commutation circuit.
The performance of critical piece comprises:
1, MCU single-chip microcomputer.
Single-chip microcomputer is by CPU, RAM, ROM, timing number device and multiple I/O Interface integration on one chip, forms the online real-time control computer of chip-scale.Single-chip microcomputer has the advantages such as volume is little, low in energy consumption, controlling functions strong, expansion is flexible, microminiaturized and easy to use.Can realize output voltage dipole inversion, pipe to soil potential is awaited orders and is monitored and automatically trigger startup, data acquisition, the functions such as Long-distance Control, adopts single-chip microcomputer both to ensure that the realization of various functions, turn improves the reliability of equipment.
8 single-chip microcomputers can be adopted, operating frequency 0 ~ 20MHz, possess 3 timers, require that the frequency acquisition for electric potential signal reaches 2 times/more than s.Meanwhile, the parameter such as stability, anti-interference of single-chip microcomputer should meet the needs of system long-time running.
System adopts low power dissipation design, and single-chip microcomputer has the sleep pattern based on interrupt operation, has monitoring of awaiting orders (monitoring pipe/earth potential) and automatically triggers start-up performance.When the pipe/earth potential arithmetic average collected by 3 place's controlling of sampling points is in default setting (-0.85V ~-1.5V) scope, drainage power-supply device enters sleep pattern, enables small area analysis output unit.When pipeline is subject to strong dc interference, and when exceeding the scope of default (-0.85V ~-1.5V) by pipe/earth potential arithmetic average that 3 place's controlling of sampling points collect, singlechip chip triggers startup automatically, be switched to silicon controlled rectifier output unit operational mode, the response time is less than 3 seconds.After row is started shipment in automatic triggering, with the automatic regulation output size of current of potentiostatic mode.
2, data acquisition isolated variable module:
Pipeline is installed 3 place's controlling of sampling points and in Near Pipelines soil, presets long-effect copper sulfate reference electrode corresponding to 3 places.Controlling of sampling dot spacing is preferably 30m, and corresponding long-effect copper sulfate reference electrode and controlling of sampling dot spacing are not more than 1m.All be connected the digital voltmeter of high internal resistance between cathodic protection station cable with reference cable, realize d. c. voltage signal collection.Again by modular direct voltage isolating transmitter, the d. c. voltage signal of collection can be converted in proportion to the standard output signals of isolating with input signal.Input direct voltage range of signal is 0 ~ 200VDC, and output signal has the various ways such as 4 ~ 20mA, 0 ~ 20mA, 0 ~ 5VDC and 0 ~ 10VDC.Data acquisition isolated variable module need realize 3000VDC tri-isolation between input signal, output signal, accessory power supply, effectively solves ground return circuit crosstalk.
3, constant potential current transformer:
1) lectotype selection
Because the power output of separate unit drainage power-supply device is large, exporting for obtaining reliable, stable electric current, should SCR rectification circuit be used.This circuit adopts silicon controlled rectifier constant potential current transformer as power-ourput device.Alternating voltage is through transformer pressure-reducing, and controllable silicon slicing, the direct current obtaining pulsing exports.Using reference electrode current potential as feedback control signal, amplify process through error, adjustment thyristor operating angle, realizes the adjustment to output current.
Controllable silicon slicing is the continuous adjustment realizing output voltage (-200V ~+200V), output current (2A ~ 100A) by changing the silicon controlled angle of flow.
2) small area analysis output unit
But this power-ourput device is (flow through the maintenance electric current that silicon controlled electric current is less than device, controllable silicon will turn off) when output current is less, cannot provide output current.For this reason, at small area analysis section (0 ~ 2A), small area analysis output unit should be increased.This unit can change according to polarities of potentials, automatically the polarity of adjustment output current.
For the reliable of guaranteed output output system effectively runs, Intelligent treatment need be carried out by singlechip chip, the running status of automatic switchover silicon controlled rectifier output unit and small area analysis output unit.
3) dipole inversion
For the polarity realizing drainage power-supply device output voltage can be changed automatically with the polarity of pipe to soil potential, adopt the bridge rectifier topological structure shown in Fig. 2.According to the needs of actual output voltage polarity, by adopting singlechip chip to carry out Intelligent treatment, the triggering signal of automatic switchover silicon-controlled device, realize the reversing of output voltage.
When load in figure (RL) upper end needs positive polarity electric current to export, MCU single-chip microcomputer is that positive polarity exports trigger mode, and triggering signal controls controllable silicon V1, V3, V6, V8.At the positive half cycle of alternating voltage input current, V1, V6 conducting, V3, V8 end, and electric current gets back to TR level lower end by TR level upper end through n → V1 → c d e → RL → p q → V6 → k; At the negative half period of alternating voltage input current, V3, V8 conducting, V1, V6 end, and electric current gets back to TR level upper end by TR level lower end through k → V3 → d e → RL → p q s → V8 → n.
When load in figure (RL) upper end needs negative polarity electric current to export, MCU single-chip microcomputer is that negative polarity exports trigger mode, and triggering signal controls controllable silicon V2, V4, V5, V7.At the positive half cycle of alternating voltage input current, V4, V7 conducting, V2, V5 end, and electric current gets back to TR level lower end by TR level upper end through n m → V7 → s q p → RL → e → V4 → j k; At the negative half period of alternating voltage input current, V2, V5 conducting, V4, V7 end, and electric current gets back to TR level upper end by TR level lower end through k j → V5 → p → RL → e d c → V2 → m n.
4) the anti-DC influence of lightning protection
(1) ac input end of drainage power-supply device adopts nominal discharge current to be that the power surge protector of 20kA protects equipment, and circuit form is parallel connection type.
Power surge protector the key technical indexes: maximum Uc 385V, nominal discharge current 20kA, maximum discharge current 40kA, deboost (8/20 μ s)≤1.8kV, leakage current≤20 μ A, response speed≤25ns.
Surge protector is installed near power-supply device, is not more than 10m with the mounting distance of drainage power-supply device, connects wire cross-section area and is not less than 10mm
2.Circuit breaker or fuse that nominal current value is 32A should be installed in the front end of surge protector.Ac input end surge protector is installed and is seen Fig. 3.
(2) DC output end of drainage power-supply device adopts nominal discharge current to be that the power surge protector of 40kA protects equipment, and circuit form is parallel connection type.
Power surge protector the key technical indexes: maximum Uc 275V, minimum conducting voltage 100 ~ 150V, nominal discharge current 40kA; maximum discharge current 60kA; deboost (8/20 μ s)≤1.3kV, leakage current≤20 μ A, response speed≤25ns.
Surge protector is installed near power-supply device, is not more than 10m with the mounting distance of drainage power-supply device, connects wire cross-section area and is not less than 10mm
2.Circuit breaker or fuse that nominal current value is 32A should be installed in the front end of surge protector.DC output end surge protector is installed and is seen Fig. 4.
(3) the part of data acquisition cable (reference cable, cathodic protection station cable) of drainage power-supply device adopts nominal discharge current to be that the surge protector of 20kA protects equipment, and circuit form is tandem type or parallel connection type.
Surge protector the key technical indexes: maximum Uc 275V, nominal discharge current 20kA, maximum discharge current 60kA, deboost (10/700 μ s)≤50V.
5) type of cooling
By adopting constant potential current transformer, ensure that the power output of this drainage power-supply device is 20kW, output voltage range-200V ~+200V, output-current rating is 100A to the maximum.
Adopt the oil cooled constant potential current transformer of transformer, the needs of outdoor mounted and high-power output can be met.After system full-load run 24h, the coil of transformer, reactor, the maximum temperature-rise of iron core are no more than 60 DEG C.
Under drainage power-supply device normal running (operation) conditions, the continuous operation life-span is not less than 10 years.
6) degree of protection:
The casing degree of protection of drainage power-supply device: outdoor version IP55 and more than, indoor type IP31 and more than, and meet GB4208 requirement.
The cold-rolled steel sheet that drainage power-supply device casing adopts thickness to be not less than 1.5mm is shaped, and surface adopts electrostatic plastic spraying preservative treatment.
Claims (9)
1. a great power bidirectional forced drainage power-supply device, is characterized in that: comprise that MCU single-chip microcomputer exports trigger element with the small area analysis output unit be connected with MCU single-chip microcomputer respectively, positive polarity, negative polarity exports trigger element, data acquisition isolated variable module, externally communication interface, keyboard and console switch, liquid crystal display and acoustic-optic alarm; Described positive polarity exports trigger element and is connected with the constant potential current transformer of rectification circuit respectively with negative polarity output trigger element; Described small area analysis output unit is connected with the commutation circuit of rectification circuit; Described data acquisition isolated variable module is connected with the anti-DC influence unit of the lightning protection of rectification circuit.
2. great power bidirectional forced drainage power-supply device according to claim 1, it is characterized in that: described MCU single-chip microcomputer carries out Real-Time Monitoring to pipe to soil potential, when pipe to soil potential is within the scope of default setting, drainage power-supply device enters sleep pattern, enables small area analysis output unit; When pipeline is subject to strong dc interference, and when the pipe/earth potential mean value of multiple controlling of sampling point exceedes default scope, MCU singlechip chip triggers startup automatically, is switched to constant potential current transformer; After automatic triggering startup optimization, with the automatic regulation output size of current of potentiostatic mode.
3. great power bidirectional forced drainage power-supply device according to claim 1, is characterized in that: described data acquisition isolated variable module is included in pipeline installs many places controlling of sampling point and in Near Pipelines soil, preset long-effect copper sulfate reference electrode corresponding to many places; Controlling of sampling point draws cathodic protection station cable, and long-effect copper sulfate reference electrode draws reference cable; All be connected the digital voltmeter of high internal resistance between cathodic protection station cable with reference cable, realize d. c. voltage signal collection; By direct voltage isolating transmitter, the d. c. voltage signal of collection is converted in proportion to the standard output signals of isolating with input signal again, realize 3000VDC tri-isolation between input signal, output signal, accessory power supply.
4. great power bidirectional forced drainage power-supply device according to claim 3, is characterized in that: described input direct voltage range of signal is 0 ~ 200VDC, and output signal comprises 4 ~ 20mA, 0 ~ 20mA, 0 ~ 5VDC and 0 ~ 10VDC.
5. great power bidirectional forced drainage power-supply device according to claim 3; it is characterized in that: reference electrode cable, cathodic protection station cable employing nominal discharge current is that the surge protector of 20kA protects equipment, and circuit form is tandem type or parallel connection type.
6. great power bidirectional forced drainage power-supply device according to claim 1, is characterized in that: described constant potential current transformer is silicon controlled rectifier constant potential current transformer.
7. great power bidirectional forced drainage power-supply device according to claim 6, is characterized in that: the AC power input side of rectification circuit, DC output side all arrange lightning protection unit.
8. great power bidirectional forced drainage power-supply device according to claim 7, is characterized in that: described ac input end employing nominal discharge current is that the power surge protector of 20kA protects equipment, and circuit form is parallel connection type.
9. great power bidirectional forced drainage power-supply device according to claim 7, is characterized in that: described DC output end employing nominal discharge current is that the power surge protector of 40kA protects equipment, and circuit form is parallel connection type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801467.0A CN105337512A (en) | 2015-11-19 | 2015-11-19 | Large-power bidirectional enforced drainage electric power apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801467.0A CN105337512A (en) | 2015-11-19 | 2015-11-19 | Large-power bidirectional enforced drainage electric power apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105337512A true CN105337512A (en) | 2016-02-17 |
Family
ID=55287858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510801467.0A Pending CN105337512A (en) | 2015-11-19 | 2015-11-19 | Large-power bidirectional enforced drainage electric power apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105337512A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130371A (en) * | 2016-07-20 | 2016-11-16 | 广东双核电气有限公司 | The Switching Power Supply that a kind of Intelligent constant power rectification controls |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10357396A1 (en) * | 2003-12-09 | 2005-07-07 | Martin Gmbh | Unit producing current for cathodic corrosion protection, e.g. for large systems such as pipelines, applies thyristor control to transformer primary supply |
| CN1650506A (en) * | 2002-05-17 | 2005-08-03 | 约翰·J·威萨亚西尔 | AC-DC converters with bi-directional thyristor valves |
| CN103270464A (en) * | 2010-12-22 | 2013-08-28 | 英特尔公司 | Cold swap load adaptive power supply |
| CN103695937A (en) * | 2013-12-26 | 2014-04-02 | 中国石油大学(北京) | Generalized direct current cathodic protection system and generalized direct current constant potential rectifier thereof |
| CN103899883A (en) * | 2014-04-03 | 2014-07-02 | 中国石油集团工程设计有限责任公司 | Oil and gas pipeline comprehensive protection method for high-voltage direct-current grounding electrode interference |
-
2015
- 2015-11-19 CN CN201510801467.0A patent/CN105337512A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1650506A (en) * | 2002-05-17 | 2005-08-03 | 约翰·J·威萨亚西尔 | AC-DC converters with bi-directional thyristor valves |
| DE10357396A1 (en) * | 2003-12-09 | 2005-07-07 | Martin Gmbh | Unit producing current for cathodic corrosion protection, e.g. for large systems such as pipelines, applies thyristor control to transformer primary supply |
| CN103270464A (en) * | 2010-12-22 | 2013-08-28 | 英特尔公司 | Cold swap load adaptive power supply |
| CN103695937A (en) * | 2013-12-26 | 2014-04-02 | 中国石油大学(北京) | Generalized direct current cathodic protection system and generalized direct current constant potential rectifier thereof |
| CN103899883A (en) * | 2014-04-03 | 2014-07-02 | 中国石油集团工程设计有限责任公司 | Oil and gas pipeline comprehensive protection method for high-voltage direct-current grounding electrode interference |
Non-Patent Citations (1)
| Title |
|---|
| 于欣恺: ""管道防腐恒电位仪的控制系统研究"", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130371A (en) * | 2016-07-20 | 2016-11-16 | 广东双核电气有限公司 | The Switching Power Supply that a kind of Intelligent constant power rectification controls |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105116296A (en) | Special fault indicator for high-voltage power transmission network cable line | |
| CN103592580A (en) | Insulator haze and pollution flashover online monitoring system and method | |
| CN204874749U (en) | Oil -water well sleeve pipe anticorrosion cathodic protection and digital remote monitoring device | |
| CN203715726U (en) | Oil-water well casing cathode protection digital remote monitoring corrosion-proof instrument | |
| CN104852349B (en) | Overvoltage protection device for natural gas pipeline system | |
| CN105337512A (en) | Large-power bidirectional enforced drainage electric power apparatus | |
| CN106130371A (en) | The Switching Power Supply that a kind of Intelligent constant power rectification controls | |
| CN105071541A (en) | High-reliability substation online monitoring system | |
| CN104967108A (en) | DC power supply system of oil-water well bushing cathode protection anti-corrosion instrument | |
| CN203700526U (en) | Impressed current protection system | |
| CN205616949U (en) | Regional cathodic protection prison measure and regulate accuse system | |
| CN202405774U (en) | Stray current drainage device | |
| CN108707907A (en) | A kind of collecting well group cathodic protection digitlization remote monitoring cabinet and method | |
| CN209043962U (en) | High-tension cable sheath grounding circulation monitoring device | |
| CN208501107U (en) | A kind of underground metalliferous polarization potential intelligent control instrument | |
| CN204167854U (en) | A kind of cable termination tower apparatus | |
| CN204497723U (en) | Overvoltage protection device for natural gas pipeline system | |
| CN209119804U (en) | Electric furnace overvoltage energy absorption protective device | |
| CN207302857U (en) | A kind of intelligent clandestine network distribution transformer | |
| CN111856973A (en) | Intelligent control system for buried steel pipe and rail drainage | |
| CN202956146U (en) | Monitoring device of detection well of DC (direct current) earth electrode and system thereof | |
| CN102780176B (en) | Method for reducing insulation overhead ground wire induction voltage of alternating current transmission line | |
| CN104535894A (en) | Small current grounding fault line selection method and device in double-bus operation mode | |
| RU2752495C1 (en) | Combined cathode protection device with autonomous power supply from renewable energy sources | |
| CN205622213U (en) | Cable outward appearance stray current protector based on initiatively reduce current potential |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180110 Address after: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Applicant after: China Petroleum Engineering Construction Co Ltd Address before: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Applicant before: Engineering Design Co., Ltd., China Petroleum Group |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160217 |