CN202256131U - Insulation status online monitoring system of sulfur hexafluoride inflatable-type current transformer - Google Patents
Insulation status online monitoring system of sulfur hexafluoride inflatable-type current transformer Download PDFInfo
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- CN202256131U CN202256131U CN 201120414589 CN201120414589U CN202256131U CN 202256131 U CN202256131 U CN 202256131U CN 201120414589 CN201120414589 CN 201120414589 CN 201120414589 U CN201120414589 U CN 201120414589U CN 202256131 U CN202256131 U CN 202256131U
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Abstract
The utility model discloses an insulation status online monitoring system of the sulfur hexafluoride inflatable-type current transformer, which is characterized in that: a first switch electromagnetic valve is connected with a stabilizing valve, the output end of the stabilizing valve is connected with an infrared sensor and an electrochemical sensing device, the electrochemical sensing device is connected with a pressurizing pump through a second switch electromagnetic valve, the pressurizing pump is connected with a pressure adjusting valve, the pressure adjusting valve can be communicated with a transformer gas compensation port, and the first switch electromagnetic valve can be communicated with the transformer gas compensation port. Due to the adoption of the insulation status online monitoring system, the online monitoring can be realized, the real-time performance is strong, the sample gas after being detected can be sent back to the inflatable current transformer, and the gas loss and the air pollution can be reduced.
Description
Technical field
The utility model relates to the on-line monitoring of high-voltage electric equipment technical field, is specifically related to a kind of sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system and method.
Technical background
At present, prior art is to SF
6Detection and gas analyzing and testing that the on-line monitoring of (sulfur hexafluoride) gas insulated high voltage electrical equipment and checkup item mainly contain mechanical fault, wherein the gas analysis detection is diagnosis SF
6A kind of novel means and methods of air insulating device internal work situation, the scene that is used for high-voltage electrical equipment is detected and plant maintenance.
SF
6The stability of electrical equipment and reliability depend on SF fully
6If the clarity of gas is SF
6Be mixed with impurity in the gas, do not reach specified standard, its arc extinguishing and insulation characterisitic will descend greatly so, therefore are necessary SF
6The purity of gas is monitored in real time.Tradition is to SF
6The measuring method of gas purity comprises thermal conductivity method, densimetry, vapor-phase chromatography; Wherein the measuring accuracy of vapor-phase chromatography is than higher; But its instrument costs an arm and a leg, and requires skilled chromatograph operator to carry out sample analysis, just can obtain data more accurately; And harsh to the running environment requirement, therefore be not suitable for in-site measurement.Be fit to on-line measurement SF
6The method of purity comprises ultraviolet ionization method, infrared detection method, photocaustic spectroscopy, and wherein the used infrared sensor of infrared detection method is through correction, the compensation of internal circuit, and its output linearity is good; Precision is high; And external structure also is more suitable for the measurement under the high-frequency electric field environment, compares optoacoustic spectroscopy and ultraviolet method, and its cost is low; The technical development comparative maturity, these methods are mainly used in monitoring SF at present
6Gas leaks.
SO
2(sulphuric dioxide) is SF
6Main analyte SOF
2The hydrolysate of (thionyl fluoride), composition is more stable, easily long-term existence SF
6In the gas.When equipment failure relates to solid insulating material, SO
2Content is higher.Through detecting SF
6SO in the decomposing gas thing
2Content can in time be found the discharge fault that current transformer is inner, therefore, and through real-time monitoring SO
2Content can reflect SF
6The fault mode of gas insulated high voltage electric equipment and degree at present, can be used for SO
2The on-line monitoring method mainly contain infrared method, ultraviolet fluorescence method and electrochemical process, measure SO for the infrared sensor method
2Content is when with SF
6Measuring accuracy possibly not reach 100ppm during for background gas, and precision is lower, measures SO for ultraviolet fluorescence method
2Content, though measuring accuracy is higher, the structure more complicated needs temperature control system, gas distributing system costs an arm and a leg, and measures SO for electrochemical process
2Content, precision is high, and cost is low, but higher to using environmental requirement, under aerobic and normal pressure, could move reliably and with long-term, and ultraviolet fluorescence method and electrochemical process are mainly used in and reach SO in the flue in the environment at present
2Monitoring, also directly be not used to measure SF
6The electrical equipment decomposition product is measured.
In addition, present Application and Development is in the SF of on-line monitoring
6Decomposing gas thing analyser detection method mainly contains electrochemical process and photocaustic spectroscopy, like the digital SF of SXT type
6Decomposing gas thing analyser, JH3000 type SF
6Electrical equipment decomposition product detector.But there is a common shortcoming in above-mentioned detecting instrument, and the gas after detecting does not exactly return SF
6In the gas insulated high voltage electrical equipment, therefore for these small-sized SF of picture inflatable current transformer
6Electric equipment, the appearance gas large percentage that testing process is spent, and cause environmental pollution, economical inadequately.And present above-mentioned instrument all is offline inspection instruments, generally is placed in the laboratory, need in mutual inductor, take out tested gas through manual work during gas detection, sends into then and carries out analyzing and testing in the above-mentioned monitoring instrument, and efficient and real-time are all lower.
The utility model content
The purpose of the utility model is to above-mentioned technical matters; A kind of sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system and method are provided; Utilize this system and method can avoid the spent appearance gas of testing process, reduce environmental pollution, and; The efficient of gas-monitoring is high, and is real-time.
For realizing this purpose; A kind of sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system that the utility model designed; It is characterized in that: it comprises the control module that first switch electromagnetic valve, pressure maintaining valve, infrared sensor, electrochemical sensing equipment, second switch solenoid valve, force (forcing) pump, pressure-regulating valve, signal conversion module, the A/D modular converter that is connected with signal conversion module, the single-chip microcomputer that is connected with the A/D modular converter, the display module that is connected with single-chip microcomputer, signal input part are connected with single-chip microcomputer; Wherein, The output terminal of said first switch electromagnetic valve connects the input end of pressure maintaining valve; First output terminal of pressure maintaining valve connects the input end of electrochemical sensing equipment; First output terminal of pressure maintaining valve is provided with infrared sensor, and first output terminal of electrochemical sensing equipment is through the input end of second switch solenoid valve connection force (forcing) pump, and the pressurization delivery side of pump is communicated with the input end of pressure-regulating valve; The output terminal of pressure-regulating valve can be communicated with the self-sealing gas supplementing opening of inflatable current transformer, and the input end of first switch electromagnetic valve can be communicated with the self-sealing gas supplementing opening of inflatable current transformer;
The induced signal output terminal of said infrared sensor and electrochemical sensing equipment is connected signal conversion module;
The signal output part of said control module connects the control end of first switch electromagnetic valve, second switch solenoid valve and force (forcing) pump.
In the technique scheme; It also comprises interface conversion threeway and threeway; First interface of said interface conversion threeway is communicated with the self-sealing gas supplementing opening of inflatable current transformer, and second interface of interface conversion threeway is the self-sealing interface, and the input end of said first switch electromagnetic valve connects second interface of threeway; The output terminal of said pressure-regulating valve is through the 3rd interface of second hand valve connection threeway, and first interface of threeway is through the 3rd interface of the first hand valve connecting interface crossover tee.
Be provided with four-way between the input end of said pressurization delivery side of pump and pressure-regulating valve; First interface of said four-way connects the pressurization delivery side of pump; Second interface is connected with the first digital type tensimeter, and the 3rd interface is connected with the 3rd hand valve, and the 4th interface connects the input end of pressure-regulating valve.
Second output terminal of said pressure maintaining valve is connected with the second digital type tensimeter, and second output terminal of said electrochemical sensing equipment is connected with the 4th hand valve.
Technique scheme also comprises environment temperature sensor.
The signal output part of the said first digital type tensimeter, the second digital type tensimeter and environment temperature sensor is connected signal conversion module.
Said single-chip microcomputer is connected with RS485 interface module and alarm module; Wherein, The RS485 interface module is connected with embedded system, and embedded system is connected with LCD MODULE, is connected through signal pre-processing module between said signal conversion module and the A/D modular converter.
The utility model has been realized the on-line monitoring of sulfur hexafluoride inflatable current transformer state of insulation through parts such as first switch electromagnetic valve, pressure maintaining valve, infrared sensor, electrochemical sensing equipment, second switch solenoid valve, force (forcing) pump, pressure-regulating valve, signal conversion module, A/D modular converter, single-chip microcomputer, display module and control module are set; Significantly increased the real-time of monitoring; And; Appearance pneumatic transmission after having detected is got back in the inflatable current transformer, has reduced the loss of gas and to the pollution of atmosphere.In addition, through pressure in the air chamber and environment temperature association analysis, realized SF
6Inflatable current transformer state of insulation on-line monitoring system leak condition self diagnosis, the reliability of raising monitoring system.
The utility model has solved SF
6The problem that infrared sensor is used for the gases at high pressure on-line monitoring has realized SF
6The on-line monitoring of purity, measuring accuracy can reach 0.1%, is SF
6Inflatable current transformer state of insulation monitoring in real time provides foundation; Also solved SO
2The problem that electrochemical sensor is used for high pressure oxygenless gas on-line monitoring has realized SO
2The content on-line monitoring, measuring accuracy can reach 1PPM, is SF
6Inflatable current mulual inductor malfunction pattern and fault degree are judged provides foundation.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of the utility model;
Fig. 2 is the air path part structural representation of the utility model;
Wherein, 1-interface conversion threeway, 2-first hand valve, 3-threeway, 4-first switch electromagnetic valve, 5-pressure maintaining valve, the 6-second digital type tensimeter, 7-infrared sensor, 8-electrochemical sensing equipment, 9-the 4th hand valve, 10-environment temperature sensor, 11-second switch solenoid valve, 12-force (forcing) pump, 13-four-way, 14-the 3rd hand valve, the 15-first digital type tensimeter, 16-pressure-regulating valve, 17-second hand valve.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify:
A kind of sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system as shown in the figure; Comprise the control module that first switch electromagnetic valve 4, pressure maintaining valve 5, infrared sensor 7, electrochemical sensing equipment 8, second switch solenoid valve 11, force (forcing) pump 12, pressure-regulating valve 16, signal conversion module, the A/D modular converter that is connected with signal conversion module, the single-chip microcomputer that is connected with the A/D modular converter, the digital display module that is connected with single-chip microcomputer, signal input part are connected with single-chip microcomputer; Wherein, The output terminal of first switch electromagnetic valve 4 connects the input end of pressure maintaining valve 5; First output terminal of pressure maintaining valve 5 connects the input end of electrochemical sensing equipment 8; First output terminal of pressure maintaining valve 5 is provided with infrared sensor 7; First output terminal of electrochemical sensing equipment 8 connects the input end of force (forcing) pump 12 through second switch solenoid valve 11; The output terminal of force (forcing) pump 12 is communicated with the input end of pressure-regulating valve 16, and the output terminal of pressure-regulating valve 16 can be communicated with the self-sealing gas supplementing opening of inflatable current transformer, and the input end of first switch electromagnetic valve 4 can be communicated with the self-sealing gas supplementing opening of inflatable current transformer;
The induced signal output terminal of said infrared sensor 7 and electrochemical sensing equipment 8 is connected signal conversion module;
The signal output part of said control module connects the control end of first switch electromagnetic valve 4, second switch solenoid valve 11 and force (forcing) pump 12.
Above-mentioned signal conversion module converts voltage signal into the normalized current signal of 4-20mA.
In the technique scheme; Also comprise interface conversion threeway 1 and threeway 3; First interface of interface conversion threeway 1 is communicated with the self-sealing gas supplementing opening of inflatable current transformer, and second interface of interface conversion threeway 1 is the self-sealing interface, and the input end of first switch electromagnetic valve 4 connects second interface of threeway 3; The output terminal of said pressure-regulating valve 16 is through the 3rd interface of second hand valve, 17 connection threeways 3, and first interface of threeway 3 is through the 3rd interface of first hand valve, 2 connecting interface crossover tees 1.
In the technique scheme; Be provided with four-way 13 between the input end of the output terminal of force (forcing) pump 12 and pressure-regulating valve 16; First interface of four-way 13 connects the output terminal of force (forcing) pump 12; Second interface is connected with first digital type tensimeter 15, the three interfaces and is connected with the input end that the 3rd hand valve 14, the four interfaces connect pressure-regulating valve 16.
In the technique scheme, second output terminal of pressure maintaining valve 5 is connected with the second digital type tensimeter 6, and second output terminal of electrochemical sensing equipment 8 is connected with the 4th hand valve 9.
In the technique scheme,, the transmitter measure case of above-mentioned parts is provided with environment temperature sensor 10 in being set.The signal output part of first digital type tensimeter 15, the second digital type tensimeter 6 and environment temperature sensor 10 is connected signal conversion module.First digital type tensimeter 15, the second digital type tensimeter 6 is given single-chip microcomputer with the force value of correspondence; Environment temperature in the environment temperature sensor 10 measuring transducer measure case; And give monolithic with ambient temperature data, the processing through single-chip microcomputer comes the measured value of electrochemical sensor 8 is carried out temperature compensation.
In the technique scheme; Single-chip microcomputer is connected with RS485 interface module and alarm module, and wherein, the RS485 interface module is connected with embedded system; Embedded system is connected with LCD MODULE, is connected through signal pre-processing module between said signal conversion module and the A/D modular converter.Embedded system is used to provide high-quality man-machine interface, the historical operating position of system is provided visual strong chart shape show.Signal pre-processing module is realized the filtering and the amplification of signal.
In the technique scheme, infrared sensor 7 is SF
6Infrared sensor; Electrochemical sensing equipment 8 is SO
2Electrochemical sensing equipment.
In the technique scheme; The digital type tensimeter of first switch electromagnetic valve 4, pressure maintaining valve 5, second 6, infrared sensor 7, electrochemical sensing equipment 8, second switch solenoid valve 11 have constituted the measurement air chamber; The pressure of measuring air chamber in the gas content testing process is 1 atmospheric pressure, guarantees SF
6Infrared sensor and SO
2Electrochemical sensing equipment operate as normal simultaneously, provides foundation, SO through gathering control and the diagnosis of air path part sealing state that pressure signal is air path part solenoid valve, force (forcing) pump
2Electrochemical sensing equipment comprises electrochemical sensor and the structural member that electrochemical sensor is installed, and outside guaranteeing that electrochemical sensor contacts well with detected gas, guarantees that also sensor contacts with air, thereby has guaranteed SO
2Electrochemical sensor has improved serviceable life to the requirement of aerobic working environment, SO
2Electrochemical sensing equipment has three interfaces that are interconnected, and an interface connects SF
6Infrared sensor; An interface connects the 4th hand valve 9; An interface connects the import of second switch solenoid valve 11; The 4th hand valve 9 be for will measure the interface that air chamber vacuumizes, because the measurement gas recycle, vacuumize through the air path part that before the transmitter unit application the digital type tensimeter of first threeway 3, first switch electromagnetic valve 4, pressure maintaining valve 5, second 6, infrared sensor 7, electrochemical sensing equipment 8, second switch solenoid valve 11 is constituted; Thereby guarantee that measurement gas avoids air pollution, second switch solenoid valve 11 is provided convenience for the air path part maintenance.
In the technique scheme; The digital type tensimeter of force (forcing) pump 12, four-way 13, the 3rd hand valve 14, first 15, pressure-regulating valve 16 have constituted auxiliary chamber; The effect of the first digital type tensimeter 15 is sealing situation that auxiliary auxiliary chamber vacuumized and monitored auxiliary chamber; Force (forcing) pump 12 is a unidirectional device with pressure-regulating valve 16; And when the pressure reduction of pressure-regulating valve 16 input ends and output terminal reached designated value, pressure-regulating valve 16 just can be opened, and pressure-regulating valve pressure reduction 16 is provided with greater than SF in actual the use
6Atmospheric pressure in the inflatable mutual inductor (the general requirement of the working pressure of high-voltage electrical equipment remains on 0.4-0.5MPa); Therefore; When the 4th hand valve 9 places vacuumized, can only guarantee to measure air chamber was vacuum, and the gas in the auxiliary chamber can not be extracted out; The 3rd hand valve 14 is identical with the effect of the 4th hand valve 9, and purpose is that auxiliary chamber is evacuated.
The content that this instructions is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (7)
1. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system; It is characterized in that: it comprises the control module that first switch electromagnetic valve (4), pressure maintaining valve (5), infrared sensor (7), electrochemical sensing equipment (8), second switch solenoid valve (11), force (forcing) pump (12), pressure-regulating valve (16), signal conversion module, the A/D modular converter that is connected with signal conversion module, the single-chip microcomputer that is connected with the A/D modular converter, the display module that is connected with single-chip microcomputer, signal input part are connected with single-chip microcomputer; Wherein, The output terminal of said first switch electromagnetic valve (4) connects the input end of pressure maintaining valve (5); First output terminal of pressure maintaining valve (5) connects the input end of electrochemical sensing equipment (8); First output terminal of pressure maintaining valve (5) is provided with infrared sensor (7); First output terminal of electrochemical sensing equipment (8) connects the input end of force (forcing) pump (12) through second switch solenoid valve (11); The output terminal of force (forcing) pump (12) is communicated with the input end of pressure-regulating valve (16); The output terminal of pressure-regulating valve (16) can be communicated with the self-sealing gas supplementing opening of inflatable current transformer, and the input end of first switch electromagnetic valve (4) can be communicated with the self-sealing gas supplementing opening of inflatable current transformer;
Said infrared sensor (7) is connected signal conversion module with the induced signal output terminal of electrochemical sensing equipment (8);
The signal output part of said control module connects the control end of first switch electromagnetic valve (4), second switch solenoid valve (11) and force (forcing) pump (12).
2. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system according to claim 1; It is characterized in that: it also comprises interface conversion threeway (1) and threeway (3); First interface of said interface conversion threeway (1) is communicated with the self-sealing gas supplementing opening of inflatable current transformer; Second interface of interface conversion threeway (1) is the self-sealing interface; The input end of said first switch electromagnetic valve (4) connects second interface of threeway (3), and the output terminal of said pressure-regulating valve (16) is through the 3rd interface of second hand valve (17) connection threeway (3), and first interface of threeway (3) is through the 3rd interface of first hand valve (2) connecting interface crossover tee (1).
3. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system according to claim 2; It is characterized in that: be provided with four-way (13) between the input end of the output terminal of said force (forcing) pump (12) and pressure-regulating valve (16); First interface of said four-way (13) connects the output terminal of force (forcing) pump (12); Second interface is connected with the first digital type tensimeter (15), and the 3rd interface is connected with the 3rd hand valve (14), and the 4th interface connects the input end of pressure-regulating valve (16).
4. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system according to claim 3; It is characterized in that: second output terminal of said pressure maintaining valve (5) is connected with the second digital type tensimeter (6), and second output terminal of said electrochemical sensing equipment (8) is connected with the 4th hand valve (9).
5. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system according to claim 4, it is characterized in that: it also comprises environment temperature sensor (10).
6. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system according to claim 5 is characterized in that: the signal output part of the said first digital type tensimeter (15), the second digital type tensimeter (6) and environment temperature sensor (10) is connected signal conversion module.
7. sulfur hexafluoride inflatable current transformer state of insulation on-line monitoring system according to claim 1; It is characterized in that: said single-chip microcomputer is connected with RS485 interface module and alarm module; Wherein, The RS485 interface module is connected with embedded system, and embedded system is connected with LCD MODULE, is connected through signal pre-processing module between said signal conversion module and the A/D modular converter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120414589 CN202256131U (en) | 2011-10-27 | 2011-10-27 | Insulation status online monitoring system of sulfur hexafluoride inflatable-type current transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120414589 CN202256131U (en) | 2011-10-27 | 2011-10-27 | Insulation status online monitoring system of sulfur hexafluoride inflatable-type current transformer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364327A (en) * | 2011-10-27 | 2012-02-29 | 国网电力科学研究院武汉南瑞有限责任公司 | Sulfur hexafluoride gas-filled type current transformer insulation state on-line monitoring system and method |
| CN102721645A (en) * | 2012-06-27 | 2012-10-10 | 山东电力集团公司电力科学研究院 | Portable SF6 gas resolvent photoacoustic spectrum detecting device and method |
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| CN107102600A (en) * | 2017-06-05 | 2017-08-29 | 天华化工机械及自动化研究设计院有限公司苏州研究所 | Industrial chromatograph malleation inflates explosion-proof interlock |
| CN107317235A (en) * | 2017-08-11 | 2017-11-03 | 国网福建省电力有限公司 | A kind of outdoor inflatable mechanism case for power system |
| CN108458984A (en) * | 2018-05-21 | 2018-08-28 | 郑州力创光电技术有限公司 | The online gas-monitoring control system of air insulating device based on photoelectric sensing principle |
| CN108626447A (en) * | 2018-07-25 | 2018-10-09 | 广东电网有限责任公司 | Charging valve device and current transformer |
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| CN102364327A (en) * | 2011-10-27 | 2012-02-29 | 国网电力科学研究院武汉南瑞有限责任公司 | Sulfur hexafluoride gas-filled type current transformer insulation state on-line monitoring system and method |
| CN102364327B (en) * | 2011-10-27 | 2014-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Sulfur hexafluoride gas-filled type current transformer insulation state on-line monitoring system and method |
| CN102721645A (en) * | 2012-06-27 | 2012-10-10 | 山东电力集团公司电力科学研究院 | Portable SF6 gas resolvent photoacoustic spectrum detecting device and method |
| CN102721645B (en) * | 2012-06-27 | 2014-09-17 | 国网山东省电力公司电力科学研究院 | Portable SF6 gas resolvent photoacoustic spectrum detecting device and method |
| CN104316579A (en) * | 2014-08-23 | 2015-01-28 | 国家电网公司 | Gas distribution method of detector for detecting SF6 gas decomposition products |
| CN107102600A (en) * | 2017-06-05 | 2017-08-29 | 天华化工机械及自动化研究设计院有限公司苏州研究所 | Industrial chromatograph malleation inflates explosion-proof interlock |
| CN107102600B (en) * | 2017-06-05 | 2019-02-12 | 天华化工机械及自动化研究设计院有限公司苏州研究所 | Industrial chromatograph positive pressure inflates explosion-proof interlock |
| CN107317235A (en) * | 2017-08-11 | 2017-11-03 | 国网福建省电力有限公司 | A kind of outdoor inflatable mechanism case for power system |
| CN108458984A (en) * | 2018-05-21 | 2018-08-28 | 郑州力创光电技术有限公司 | The online gas-monitoring control system of air insulating device based on photoelectric sensing principle |
| CN108626447A (en) * | 2018-07-25 | 2018-10-09 | 广东电网有限责任公司 | Charging valve device and current transformer |
| CN109470766A (en) * | 2018-12-21 | 2019-03-15 | 国网内蒙古东部电力有限公司电力科学研究院 | More electrical equipment SF6On-line checking gas circuit |
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Granted publication date: 20120530 |