CN112394262A - Arc external effect moment detection device and method - Google Patents
Arc external effect moment detection device and method Download PDFInfo
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- CN112394262A CN112394262A CN201910754318.1A CN201910754318A CN112394262A CN 112394262 A CN112394262 A CN 112394262A CN 201910754318 A CN201910754318 A CN 201910754318A CN 112394262 A CN112394262 A CN 112394262A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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Abstract
The application discloses an arc external effect moment detection device and method, which are used for detecting arc external effect moments of equipment such as GIS (gas insulated switchgear), GIL (gas insulated switchgear) and the like in an internal arc test. The device includes direct current power supply, photosensitive element group and output resistance, wherein: the direct current power supply, the photosensitive element group and the output resistor are connected in series to form a loop; the photosensitive element group comprises one or more photosensitive elements connected in parallel; arranging the photosensitive elements corresponding to different detection points of the test article; two terminals are led out from two ends of the output resistor respectively to form a measuring system wiring port; the measuring system is used to record the moment when the voltage rise is first detected as the arc external effect moment.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to an arc external effect moment detection device and method.
Background
Internal arc tests are required for equipment such as a Gas-insulated metal-enclosed switchgear (GIS), a Gas-insulated transmission line (GIL), and the like, that is, the protection capability of the equipment to personnel when dangerous electrical effects occur inside the equipment is verified. Specifically, when the device is subjected to an internal arc test, the internal gas pressure of the device rises, the local temperature rises, and finally, an external effect of the shell or the pressure release device cracking may occur, and the crack leaks an arc light along with the external effect, and what we want to detect is when the external effect occurs in the device.
Disclosure of Invention
In view of this, the present invention provides an arc external effect time detection device and method, so as to detect the arc external effect time of equipment such as GIS, GIL and the like in an internal arc test.
An arc external effect moment detection device comprises a direct current power supply, a photosensitive element group and an output resistor, wherein:
the direct current power supply, the photosensitive element group and the output resistor are connected in series to form a loop;
the photosensitive element group comprises one or more photosensitive elements connected in parallel; arranging the photosensitive elements corresponding to different detection points of the test article;
two terminals are led out from two ends of the output resistor respectively to form a measuring system wiring port;
the measuring system is used to record the moment when the voltage rise is first detected as the arc external effect moment.
Optionally, the photosensitive element is a photodiode, a phototriode or a photoresistor.
Optionally, the sample is placed in a protection tank, the photosensitive element is tightly attached to the inner wall of the protection tank, and the direct-current power supply and the output resistor are arranged outside the protection tank.
Optionally, all the elements in the arc external effect time detection device are electrically connected by a polyvinyl chloride shielding sheath flexible wire.
Optionally, the output resistor is an independent resistor or a series-parallel combination of a plurality of resistors.
Optionally, the output resistor is a resistor of 10W 100 Ω.
Optionally, the dc power supply is a power supply with 12V dc output.
Optionally, the photodiode is a photodiode with a diameter of 5 mm.
An arc external effect time detection method is applied to an arc external effect time detection device; the arc external effect moment detection device comprises a direct-current power supply, a photosensitive element group and an output resistor; the direct current power supply, the photosensitive element group and the output resistor are connected in series to form a loop; the photosensitive element group comprises one or more photosensitive elements connected in parallel; arranging the photosensitive elements corresponding to different detection points of the test article;
the method for detecting the arc external effect moment comprises the following steps:
detecting the voltage at two ends of the output resistor;
judging whether voltage rise occurs at two ends of the output resistor;
if so, the time when the voltage rise first occurs is recorded as the arc external effect time.
According to the technical scheme, the light-sensitive element is used as the sensor for detecting the external effect of the electric arc in the internal arc tests of the GIS, the GIL and other equipment, and the light-sensitive element is used for detecting when the arc light appears to judge when the shell or the pressure release device is broken.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an arc external effect time detection device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another apparatus for detecting arc external effect time according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another apparatus for detecting arc external effect time according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another apparatus for detecting arc external effect time according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another apparatus for detecting arc external effect time according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an internal arc test circuit according to the prior art;
FIG. 7 is a schematic diagram of an internal arc test arrangement according to an embodiment of the present invention;
FIG. 8 is an oscillogram of a type of GIL from a plant after an internal arc test in a certain scenario;
fig. 9 is a flowchart of a method for detecting an arc external effect moment according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, or fig. 5, an embodiment of the present invention discloses an arc external effect time detection apparatus, including a dc power supply E, a photosensitive element group 1, and an output resistor R, wherein:
the direct current power supply E, the photosensitive element group 1 and the output resistor R are connected in series to form a loop (the photosensitive element group 1 is connected to the anode of the direct current power supply E, the output resistor R is connected to the cathode of the direct current power supply E, as shown in fig. 1, fig. 2 or fig. 3, or the photosensitive element group 1 is connected to the cathode of the direct current power supply E, and the output resistor R is connected to the anode of the direct current power supply E, as shown in fig. 3 or fig. 4);
the photosensitive element group 1 comprises one or more photosensitive elements connected in parallel, and the photosensitive elements can be, for example, photodiodes (as shown in fig. 1 or fig. 3), phototransistors (as shown in fig. 2 or fig. 4) or photoresistors (as shown in fig. 5; besides, when the photosensitive elements are the photoresistors, the photosensitive element group 1 can also be connected to the negative electrode of the direct current power supply E, and the output resistor R can be connected to the positive electrode of the direct current power supply E); arranging the photosensitive elements corresponding to different detection points of the test article;
two terminals are respectively led out from two ends of the output resistor R to form a measuring system wiring port;
the measuring system is used to record the moment when the voltage rise is first detected as the arc external effect moment.
The following details the working principle of the embodiment of the present invention:
the GIS consists of a circuit breaker, a disconnecting switch, a ground connection, a mutual inductor, a lightning arrester and the like, wherein the inside of the GIS is filled with SF with certain pressure6A gas. Compared with conventional high-voltage electrical products, the GIS has the advantages of compact structure, high reliability, flexible configuration, convenience in installation, high safety, high environmental adaptability, small maintenance workload and the like. IEC 62271-203-2011 specifies test methods for GIS internal fault testing and requires GIS pressure release, shell burn-through and external effects to be recorded by appropriate methods in appendix b.2.3.3.
GIL is a high voltage, high current power transmission device with a gas-insulated, coaxial housing and conductor. Compared with the traditional overhead line or transmission cable, the GIL has the advantages of no influence of external weather, small influence on external electromagnetism, large current-carrying capacity, low fault rate, simple and convenient maintenance and the like. DL/T978-.
Based on the above annex requirements, manufacturers and laboratories need to know the states of the GIS and the GIS test samples at various times in the internal arc test process, and the arc external effect time detection device disclosed by the embodiment of the invention is produced in order to detect the time when the sample in the internal arc test has the arc external effect. It should be noted that the embodiments of the present invention are not limited to GIS and GIS test samples, and all test samples that need to detect the arc external effect moment in the internal arc test are within the application range of the embodiments of the present invention.
Fig. 6 is a schematic diagram of an internal arc test circuit principle, which includes a generator G, a protection switch GB, a closing switch MS, a regulating reactance L, an operation switch MB, a voltage measurement module U, and a current measurement module I, wherein: any two phases (such as AB phases) of the generator G are taken as a test power supply, the test power supply is connected TO a test product TO through a protection switch GB, a closing switch MS, an adjusting reactance L and an operating switch MB in sequence TO form a loop, and a voltage measuring module U and a current measuring module I are used for measuring loop voltage Uab and current Iab.
The internal arc test circuit, the arc external effect time detection device and the test TO are combined together TO obtain an internal arc test arrangement schematic diagram as shown in fig. 7 (the internal arc test circuit only shows the generator G in fig. 7, and the arc external effect time detection device only shows the four photodiodes D1-D4 in fig. 7). In fig. 7, after the test article TO is connected TO the internal arc test circuit, the test article TO is short-circuited at the arc ignition point (the position of the arc ignition point is selected according TO the specifications of IEC 62271-.
Based on this physical phenomenon, the embodiment of the present invention detects when the arc light occurs by the photosensitive element (photodiode, phototransistor, or photoresistor) TO determine when the external effect of the case or the pressure release rupture occurs TO the test TO. In the internal arc test, all the points on the test piece TO where cracks may occur can be arranged with the photosensitive element, and the specific number of detection points TO be arranged is determined by the manufacturer of the test piece TO and the laboratory.
Referring TO any one of the arc external effect moment detection devices shown in fig. 1 TO 5, in the internal arc test, when the shell and the pressure release device of the test sample TO are not broken, the resistance value of the photosensitive element does not change, when the shell or the pressure release device of the test sample TO is broken, the photosensitive element detects arc light, the resistance value changes rapidly, and at the moment, the voltage at two ends of the output resistor R also changes, that is, the voltage value detected by the measurement system connected TO the connection port of the measurement system changes. For example, based on fig. 1, in the internal arc test, when the shell of the test sample TO and the pressure release device are not broken, the photodiode is not conducted, the circuit in fig. 1 is not conducted, and the measurement system detects that the voltage is 0V; when the shell or the pressure release device of the test product TO is broken, the photosensitive diode detects arc light and is immediately conducted (equivalent TO that the resistance value of the photosensitive diode is changed from infinity TO zero), at the moment, the loop in fig. 1 is conducted, current starts from the positive pole of the direct current power supply E, and finally returns TO the negative pole of the direct current power supply E through the conducted photosensitive diode and the output resistor R, and meanwhile, the measurement system immediately detects the voltage at two ends of the output resistor R, and the value of the voltage is basically equal TO the output voltage of the direct current power supply E.
Next, taking an example of an internal arc test performed by a GIL of a certain type in a certain factory under a situation where the voltage Uab is 12kV, the effective value of the current Iab is 63kA, the peak of the current Iab is 153kV, and the current duration is 0.3s, an oscillogram obtained after the test is shown in fig. 8, in which waveforms of the current Iab, the voltage Uab, and the voltage UR across the output resistor R are shown.
The voltage rise of UR in the oscillogram indicates that the test sample shell or the pressure release device is broken for the first time, and the time is 195ms away from the current starting time, namely the test sample is broken when the current flows for 195 ms; the low level after the voltage rises indicates that a large amount of smoke generated by the rupture of the test article shields the photosensitive element, so that the loop of the detection device for the external effect moment of the electric arc is not communicated and is externally represented as the low level; the high level after the low level indicates that heat leaks out after the test sample is broken so that the photosensitive element is welded, and the detection device keeps a normal open state at the moment of the arc external effect and shows a high level to the outside. It can be seen that the time when the voltage first detected by the measurement system rises is the time of the external effect of the arc.
From the above description, it can be known that the embodiment of the present invention adopts the photosensitive element as the sensor for detecting the external effect of the arc in the internal arc test of the equipment such as the GIS, the GIL, etc., and judges when the shell or the pressure release device is broken by detecting when the arc occurs through the photosensitive element.
Optionally, in the internal arc test, it is necessary TO add a protective can 2 outside the test product TO in fig. 7 TO reduce the influence of the test environment caused by the shell cracking of the test product TO, the operation of the pressure relief device, the arc spraying and other factors. A photosensitive element in the arc external effect moment detection device is tightly attached to the inner wall of the protection tank, and the direct-current power supply E and the output resistor R are arranged outside the protection tank.
Optionally, the output resistor R is an independent resistor or a series-parallel combination of a plurality of resistors.
Optionally, the output voltage of the dc power supply E, the size of the photodiode, and the type of the output resistor R may be set according to actual needs. For example, the dc power source E may be set to dc 12V, the photodiode may be a photodiode with a diameter of 5mm, and the output resistor R may be a resistor of 10W 100 Ω.
Optionally, in order to improve the anti-interference performance of the system, all elements in the arc external effect moment detection device are electrically connected by a polyvinyl chloride shielding sheath flexible wire.
Corresponding to the device embodiment, the embodiment of the invention also discloses an arc external effect time detection method, which is applied to the arc external effect time detection device; the arc external effect moment detection device comprises a direct-current power supply, a photosensitive element group and an output resistor; the direct current power supply, the photosensitive element group and the output resistor are connected in series to form a loop; the photosensitive element group comprises one or more photosensitive elements connected in parallel; arranging the photosensitive elements corresponding to different detection points of the test article;
the method for detecting the arc external effect moment is shown in fig. 9 and comprises the following steps:
step S01: detecting the voltage at two ends of the output resistor;
step S02: judging whether voltage rise occurs at two ends of the output resistor; if yes, the process goes to step S03, otherwise, the external effect that the shell or the pressure release device is broken does not occur in the internal arc test of the test sample, and the current arc external effect detection is finished;
step S03: and recording the time when the voltage rises for the first time as the external effect time of the electric arc, and finishing the detection of the external effect time of the electric arc at this time.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The method disclosed by the embodiment corresponds to the device disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the device part for description.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, identical element in a process, method, article, or apparatus that comprises the element.
For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only Memory (ROM), a Random Access Memory (RAM), or the like.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides an electric arc external effect moment detection device which characterized in that, includes DC power supply, photosensitive element group and output resistor, wherein:
the direct current power supply, the photosensitive element group and the output resistor are connected in series to form a loop;
the photosensitive element group comprises one or more photosensitive elements connected in parallel; arranging the photosensitive elements corresponding to different detection points of the test article;
two terminals are led out from two ends of the output resistor respectively to form a measuring system wiring port;
the measuring system is used to record the moment when the voltage rise is first detected as the arc external effect moment.
2. The device for detecting the moment of external effect on arc according to claim 1, wherein said photosensitive element is a photodiode, a phototransistor or a photoresistor.
3. The arc external effect time detection device according to claim 1 or 2, wherein the sample housing is covered with a protection can, the photosensitive element is tightly attached to the inner wall of the protection can, and the dc power supply and the output resistor are disposed outside the protection can.
4. The arc external effect time detection device according to claim 1 or 2, wherein all the components of the arc external effect time detection device are electrically connected by a polyvinyl chloride shielded sheathed cord.
5. The device for detecting the moment of external effect on arc according to claim 1 or 2, wherein the output resistor is an independent resistor or a series-parallel combination of a plurality of resistors.
6. The device for detecting arc external effect moment according to claim 5, wherein the output resistor is a 10W 100 Ω resistor.
7. The arc external effect time detection device according to claim 1 or 2, wherein the dc power supply is a power supply that outputs a dc voltage of 12V.
8. The device for detecting the moment of external effect on arc according to claim 2, wherein said photodiode is a 5mm diameter photodiode.
9. The method is characterized by being applied to an arc external effect time detection device; the arc external effect moment detection device comprises a direct-current power supply, a photosensitive element group and an output resistor; the direct current power supply, the photosensitive element group and the output resistor are connected in series to form a loop; the photosensitive element group comprises one or more photosensitive elements connected in parallel; arranging the photosensitive elements corresponding to different detection points of the test article;
the method for detecting the arc external effect moment comprises the following steps:
detecting the voltage at two ends of the output resistor;
judging whether voltage rise occurs at two ends of the output resistor;
if so, the time when the voltage rise first occurs is recorded as the arc external effect time.
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| CN2689428Y (en) * | 2004-04-01 | 2005-03-30 | 江苏长江电气集团有限公司 | Internal electric arc fault detecting protector in switching cabinet |
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| CN101902030A (en) * | 2010-07-14 | 2010-12-01 | 西安交通大学 | Detecting and positioning device of arc fault of switch apparatus |
| WO2015184832A1 (en) * | 2014-10-09 | 2015-12-10 | 中兴通讯股份有限公司 | Alternating current detection circuit |
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| CN205581232U (en) * | 2016-03-31 | 2016-09-14 | 北京劳动保障职业学院 | Portable arc light protection testing arrangement |
| CN105977114A (en) * | 2016-06-30 | 2016-09-28 | 上海诚意电气有限公司 | Fuse and fusing detection device |
| CN106443431A (en) * | 2016-08-31 | 2017-02-22 | 中国西电电气股份有限公司 | Test loop and method for super/extra-high voltage circuit breaker opening and closing paralleling reactor load |
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2019
- 2019-08-15 CN CN201910754318.1A patent/CN112394262A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| CN2689428Y (en) * | 2004-04-01 | 2005-03-30 | 江苏长江电气集团有限公司 | Internal electric arc fault detecting protector in switching cabinet |
| CN201616666U (en) * | 2010-02-08 | 2010-10-27 | 保定天威恒通电气有限公司 | Multifunctional short circuit protecting system of middle and low-voltage switch cabinet |
| CN101902030A (en) * | 2010-07-14 | 2010-12-01 | 西安交通大学 | Detecting and positioning device of arc fault of switch apparatus |
| DE102014217851A1 (en) * | 2014-09-08 | 2016-03-10 | Robert Bosch Gmbh | Arc detection device, charging system for DC charging of a battery, vehicle with electric drive motor and method for detecting an arc |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 710000 No. 18, north section of West 2nd Ring Road, Lianhu District, Xi'an City, Shaanxi Province Applicant after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: No.18, north section of West 2nd Ring Road, Lianhu District, Xi'an City, Shaanxi Province, 710077 Applicant before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |