CN112630683A - Checking and repairing point system for local electric leakage of high-voltage switch cabinet - Google Patents
Checking and repairing point system for local electric leakage of high-voltage switch cabinet Download PDFInfo
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- CN112630683A CN112630683A CN202011454609.8A CN202011454609A CN112630683A CN 112630683 A CN112630683 A CN 112630683A CN 202011454609 A CN202011454609 A CN 202011454609A CN 112630683 A CN112630683 A CN 112630683A
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/56—Testing of electric apparatus
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to a local electrical leakage checking and repairing point system of a high-voltage switch cabinet, which comprises computer information processing equipment, information receiving equipment and a filter, wherein the filter is in signal connection with the information receiving equipment, the information receiving equipment is in signal connection with the computer information processing equipment through a transmission line, the filtering efficiency can be measured by the Insertion Loss (IL) of the filter, and the system is defined as follows: the leakage detection circuit comprises a power line, a filter, a power filter and a control circuit, wherein WL is 201 gE1/E2(db), E1 is voltage generated by a leakage signal on load impedance or a receiver when the leakage signal is not filtered, E2 is voltage generated by the leakage signal on the load impedance or the receiver after the leakage signal is filtered, the power line is detected through the filter, the power filter has low-pass characteristic, direct-current or low-frequency power is transmitted without attenuation, electromagnetic leakage of high frequency is greatly attenuated, and conduction leakage on the power line has two forms of common mode and differential mode.
Description
Technical Field
The invention relates to the field of high-voltage switch cabinets, in particular to a point checking and repairing system for local electric leakage of a high-voltage switch cabinet.
Background
The high-voltage switch cabinet is used for power generation, power transmission, power distribution, electric energy conversion and consumption of an electric power system and plays roles of on-off, control or protection and the like, the high-voltage switch cabinet is used as an electric appliance product with the voltage grade of 3.6-550 kV, a high-voltage isolating switch, a grounding switch, a high-voltage load switch, a high-voltage automatic coincidence and sectionalizer, a high-voltage operating mechanism, a high-voltage explosion-proof power distribution device, a high-voltage switch cabinet and the like, and at present, the switch cabinet has functions of overhead wire inlet and outlet, cable inlet and outlet, bus connection and the like. The method is mainly suitable for various places such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industrial textile, industrial and mining enterprises, residential districts, high-rise buildings and the like. The switch cabinet is composed of a cabinet body and a circuit breaker, wherein the cabinet body is composed of a shell, electrical elements, various mechanisms, secondary terminals, connecting wires and the like.
The internal circuit of the existing high-voltage switch cabinet can generate electric leakage when in use, and the point of the electric leakage can not be quickly detected when the circuit of the existing high-voltage switch cabinet is detected, so that the detection time of constructors is prolonged.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a point checking and repairing system for local electric leakage of a high-voltage switch cabinet, which is characterized in that: the system comprises computer information processing equipment, information receiving equipment and a filter, wherein the filter is in signal connection with the information receiving equipment;
the filtering performance can be measured by the Insertion Loss (IL) of the filter, and is defined as: 201 gE1/E2(db), E1 is the voltage generated by the leakage signal on the load impedance or receiver without filtering, and E2 is the voltage generated by the leakage signal on the load impedance or receiver after filtering.
Preferably, the power line is first detected by a filter, the power filter has a low-pass characteristic, so that the power of the direct current or low-frequency power supply is transmitted without attenuation, the electromagnetic leakage of higher frequency is greatly attenuated, and the conduction leakage on the power line has two forms of common mode and differential mode.
Preferably, the signal line is detected through a filter, the filtering object is the signal line, the signal line filter is to ensure smooth transmission of signals and simultaneously suppress external harmonic waves and conducted leakage electromagnetic waves, the signal line filter is divided into three types, namely a feed-through filter, a PCB filter and a filter connector, and the feed-through filter is used for passing through a single lead of the shielding box body; the PCB filter is used for filtering signal lines on the circuit board, so that the cost is low and the installation is easy; the filter connector is used for cables passing through the shielded enclosure.
Preferably, the computer information processing apparatus generates electromagnetic leakage to varying degrees and electromagnetic leakage includes both radiation emission and conduction emission.
Preferably, the computer information processing device comprises a processor subsystem, a random access memory RAM subsystem, a read only memory ROM subsystem, an input output device, a magnetic disk drive, a printer, an optical disk drive, a power supply.
Preferably, the electromagnetic energy is absorbed and lost, and the absorptive filter is composed of a lossy device, and the filtering function is realized by absorbing and converting the electromagnetic energy into heat energy.
Preferably, a power filter is employed at the power input.
Has the advantages that:
1. the power line is detected by the filter, the power filter has a low-pass characteristic, so that the power of a direct current or low-frequency power supply is transmitted without attenuation, the electromagnetic leakage of a higher frequency is greatly attenuated, and the conduction leakage on the power line has two forms of a common mode and a differential mode.
2. The signal line is detected through a filter, the filtering object is the signal line, the signal line filter ensures smooth transmission of signals, and simultaneously inhibits external harmonic waves and conduction leakage electromagnetic waves, the signal line filter is divided into a feed-through filter, a PCB filter and a filter connector, and the feed-through filter is used for passing through a single lead of a shielding box body; the PCB filter is used for filtering signal lines on the circuit board, so that the cost is low and the installation is easy; the filter connector is used for cables passing through the shielded enclosure.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a basic schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the detection circuit 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.
Example 1:
a checking and repairing point system for local electric leakage of a high-voltage switch cabinet comprises computer information processing equipment, information receiving equipment and a filter, wherein the filter is in signal connection with the information receiving equipment;
the filtering performance can be measured by the Insertion Loss (IL) of the filter, and is defined as: 201 gE1/E2(db), E1 is the voltage generated by the leakage signal on the load impedance or receiver without filtering, and E2 is the voltage generated by the leakage signal on the load impedance or receiver after filtering.
One specific application of this embodiment is: the power line is detected by the filter, the power filter has a low-pass characteristic, so that the power of a direct current or low-frequency power supply is transmitted without attenuation, the electromagnetic leakage of a higher frequency is greatly attenuated, and the conduction leakage on the power line has two forms of a common mode and a differential mode.
Example 2:
a checking and repairing point system for local electric leakage of a high-voltage switch cabinet comprises computer information processing equipment, information receiving equipment and a filter, wherein the filter is in signal connection with the information receiving equipment;
the filtering performance can be measured by the Insertion Loss (IL) of the filter, and is defined as: 201 gE1/E2(db), E1 is the voltage generated by the leakage signal on the load impedance or receiver without filtering, and E2 is the voltage generated by the leakage signal on the load impedance or receiver after filtering.
The power line is detected through a filter, the power filter has a low-pass characteristic, so that the power of a direct current or low-frequency power supply is transmitted without attenuation, the electromagnetic leakage of a higher frequency is greatly attenuated, the conduction leakage on the power line has two forms of a common mode and a differential mode, a signal line is detected through the filter, a filtering object is the signal line, the smooth transmission of a signal is ensured by the signal line filter, the external harmonic waves and the conduction leakage electromagnetic waves are simultaneously inhibited, the signal line filter is divided into a feed-through filter, a PCB filter and a filter connector, and the feed-through filter is used for penetrating through a single lead of a shielding box body; the PCB filter is used for filtering signal lines on the circuit board, so that the cost is low and the installation is easy; the filter connector is used for cables passing through the shielded enclosure.
The positioning principle of the embodiment is as follows: the computer information processing equipment comprises a processor subsystem, a random access memory RAM subsystem, a read-only memory ROM subsystem, input and output equipment, a magnetic disk driver, a printer, an optical disk driver and a power supply, wherein the electromagnetic leakage is generated to different degrees and comprises radiation emission and conduction emission, the filter can compress an electromagnetic spectrum transmitted through a lead and a cable, and absorbs and loses electromagnetic energy, the absorption filter is composed of a loss device, the filtering function is realized by absorbing and converting the electromagnetic energy into heat energy, and the power supply filter is adopted at the input end of the power supply.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments have not been described in detail to avoid obscuring the description of the invention in its specific form, and it is to be understood that many modifications and variations are possible in light of the teaching of this specification. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides a local electricity of high tension switchgear is revealed examines repair and is clicked system which characterized in that: the system comprises computer information processing equipment, information receiving equipment and a filter, wherein the filter is in signal connection with the information receiving equipment;
the filtering performance can be measured by the Insertion Loss (IL) of the filter, and is defined as: 201 gE1/E2(db), E1 is the voltage generated by the leakage signal on the load impedance or receiver without filtering, and E2 is the voltage generated by the leakage signal on the load impedance or receiver after filtering.
2. The system for checking and repairing local electric leakage of high-voltage switch cabinet according to claim 1, wherein: the power line is detected through the filter, the power supply filter has a low-pass characteristic, so that the power of a direct-current or low-frequency power supply is transmitted without attenuation, the electromagnetic leakage of a higher frequency is greatly attenuated, and the conduction leakage on the power line has two forms of a common mode and a differential mode.
3. The system for checking and repairing local electric leakage of high-voltage switch cabinet according to claim 1, wherein: the signal line is detected through the filter, the filtering object is the signal line, the signal line filter ensures smooth transmission of signals, simultaneously inhibits external harmonic waves and conducts leakage electromagnetic waves, the signal line filter is divided into a feed-through filter, a PCB filter and a filter connector, the feed-through filter is used for penetrating through a single lead of the shielding box body, the PCB filter is used for filtering the signal line on the circuit board, the cost is low, the installation is easy, and the filter connector is used for penetrating through a cable of the shielding box body.
4. The system for checking and repairing local electric leakage of high-voltage switch cabinet according to claim 1, wherein: the computer information processing equipment generates electromagnetic leakage to different degrees, and the electromagnetic leakage comprises radiation emission and conduction emission.
5. The system for checking and repairing local electric leakage of high-voltage switch cabinet according to claim 1, wherein: the computer information processing device comprises a processor subsystem, a Random Access Memory (RAM) subsystem, a Read Only Memory (ROM) subsystem, an input/output device, a magnetic disk drive, a printer, an optical disk drive and a power supply.
6. The system for checking and repairing local electric leakage of high-voltage switch cabinet according to claim 1, wherein: the filter not only can compress the electromagnetic spectrum transmitted by a lead and a cable, and absorb and lose electromagnetic energy, but also is composed of a lossy device, and the electromagnetic energy is absorbed and converted into heat energy to realize the filtering function.
7. The system for checking and repairing local electric leakage of high-voltage switch cabinet according to claim 1, wherein: a power filter is used at the power input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011454609.8A CN112630683A (en) | 2020-12-10 | 2020-12-10 | Checking and repairing point system for local electric leakage of high-voltage switch cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011454609.8A CN112630683A (en) | 2020-12-10 | 2020-12-10 | Checking and repairing point system for local electric leakage of high-voltage switch cabinet |
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| CN112630683A true CN112630683A (en) | 2021-04-09 |
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| CN202011454609.8A Pending CN112630683A (en) | 2020-12-10 | 2020-12-10 | Checking and repairing point system for local electric leakage of high-voltage switch cabinet |
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Citations (8)
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|---|---|---|---|---|
| CN101877160A (en) * | 2009-04-30 | 2010-11-03 | 上海申达自动防范***工程有限公司 | Leakage cable intrusion detector system |
| CN202815097U (en) * | 2012-10-13 | 2013-03-20 | 湖北中科电气股份有限公司 | Insulating medium loss on-line monitoring system |
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2020
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Patent Citations (9)
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| CN101877160A (en) * | 2009-04-30 | 2010-11-03 | 上海申达自动防范***工程有限公司 | Leakage cable intrusion detector system |
| CN103168245A (en) * | 2010-06-07 | 2013-06-19 | Amp控制股份有限公司 | Method for detection of leakage or fault currents from equipment in an electrical power system |
| CN202815097U (en) * | 2012-10-13 | 2013-03-20 | 湖北中科电气股份有限公司 | Insulating medium loss on-line monitoring system |
| CN103197211A (en) * | 2013-03-28 | 2013-07-10 | 国家电网公司 | Switch cabinet partial discharge itinerant detector |
| US20160161543A1 (en) * | 2014-12-09 | 2016-06-09 | Rosemount Inc. | Partial discharge detection system |
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Application publication date: 20210409 |
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