CN112394297A - Electrical cabinet insulation detection device and method based on bus bar induction power supply - Google Patents
Electrical cabinet insulation detection device and method based on bus bar induction power supply Download PDFInfo
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- CN112394297A CN112394297A CN202011248775.2A CN202011248775A CN112394297A CN 112394297 A CN112394297 A CN 112394297A CN 202011248775 A CN202011248775 A CN 202011248775A CN 112394297 A CN112394297 A CN 112394297A
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- 238000009413 insulation Methods 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 230000006698 induction Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 13
- 230000005856 abnormality Effects 0.000 claims abstract description 11
- 230000003750 conditioning effect Effects 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims description 8
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides an electrical cabinet insulation detection device based on bus bar induction power supply, which comprises an induction power supply unit, a signal acquisition unit, a signal conditioning unit, an A/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, an alarm unit and a communication unit, wherein the induction power supply unit is used for supplying power to the electrical cabinet; the electrical cabinet insulation detection device provides power through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the electrical cabinet according to the collected signal, and timely sends out an alarm when the insulation abnormality occurs so that a worker can timely make a solution and further guarantee the working reliability of the electrical cabinet. The invention provides a busbar induction power supply-based electrical cabinet insulation detection device and method, which can more conveniently and accurately detect the insulation condition and pass the working reliability of an electrical cabinet.
Description
Technical Field
The invention belongs to the technical field of power detection, and particularly relates to a busbar induction power supply-based electrical cabinet insulation detection device and method.
Background
With the development of socioeconomic and the progress of science and technology, people have higher and higher requirements on indexes of power supply. The electrical cabinet is used as an important component of an electrical power system, and safe and reliable operation of the electrical cabinet is an important guarantee of the electrical power system. In order to cooperate with the development of intellectualization, the detection of the power system is also developing towards intellectualization, and meanwhile, the safety and reliability of the power system can be improved.
The invention provides a busbar induction power supply-based electrical cabinet insulation detection device, wherein an induction power supply unit is adopted to directly generate electric energy by induction under the condition that a busbar is electrified, no additional power supply is required, the device is convenient and simple to install, reliable and safe in power supply, can intelligently acquire current and voltage signals, can analyze and judge the insulation condition of an electrical cabinet according to the acquired signals, and can timely send an alarm when abnormality occurs, so that the working reliability of the electrical cabinet is effectively improved.
Disclosure of Invention
The invention provides a busbar induction power supply-based electrical cabinet insulation detection device and method, which can more conveniently and accurately detect the insulation condition and pass the working reliability of an electrical cabinet.
The invention particularly relates to an electrical cabinet insulation detection device based on bus bar induction power supply, which comprises an induction power supply unit, a signal acquisition unit, a signal conditioning unit, an A/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, an alarm unit and a communication unit, wherein the signal acquisition unit is sequentially connected with the signal conditioning unit, the A/D conversion unit and the control processing unit, and the control processing unit is respectively connected with the induction power supply unit, the key input unit, the storage unit, the display unit, the alarm unit and the communication unit; the electrical cabinet insulation detection device provides power through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the electrical cabinet according to the collected signal, and timely sends out an alarm when the insulation abnormality occurs so that a worker can timely make a solution and further guarantee the working reliability of the electrical cabinet.
The induction power supply unit is directly arranged above a busbar in the electrical cabinet and comprises a magnetic core, a winding, a protection module, a rectifying circuit, a first filter circuit, a storage battery and a power supply switch, alternating current voltage is obtained from the busbar through the winding, the smooth direct current voltage is output through the protection module, the rectifying circuit and the first filter circuit in a voltage stabilizing manner, and electric energy storage or output is carried out through the storage battery; and the power supply switch receives a remote control instruction and controls whether to provide a power supply for the electrical cabinet insulation detection device.
The signal acquisition unit adopts a current sensor to acquire leakage current of the electrical cabinet and adopts a voltage sensor to acquire phase voltage.
The signal conditioning unit comprises an amplifying circuit and a second filter circuit, wherein the amplifying circuit amplifies the acquired signal and outputs a signal meeting the input requirement of the A/D conversion unit; the second filter circuit filters high-frequency interference signals by adopting a low-pass filter.
The key input unit is combined with the storage unit and the display unit to carry out parameter setting and information inquiry, and the parameters comprise a leakage current alarm value and an electric capacity initial value difference alarm value.
The alarm unit adopts an audible and visual alarm, and can send out audible and visual alarm signals in time when the electrical cabinet insulation detection device detects abnormality; the communication unit transmits the detection result of the electrical cabinet insulation detection device to a remote monitoring center by adopting a wireless communication technology, and can receive a control instruction of the remote monitoring center to realize remote control and parameter setting.
The invention also provides an electrical cabinet insulation detection method based on bus bar induction power supply, which comprises the following steps:
step (1): controlling the induction power supply unit to supply power to the electrical cabinet insulation detection device;
step (2): collecting the leakage current and the phase voltage;
and (3): amplifying the signal by the amplifying circuit;
and (4): filtering out high-frequency interference signals through the second filter circuit;
and (5): performing A/D conversion by the A/D conversion unit;
and (6): the control processing unit compares the leakage current with the leakage current alarm value, if the leakage current alarm value is larger than the leakage current alarm value, a leakage current high alarm is sent out through the alarm unit and the display unit, and if the leakage current alarm value is not larger than the leakage current alarm value, the step (7) is carried out;
and (7): calculating the capacitance of the main insulation operation state of the electrical cabinet
I is the leakage current, U is the phase voltage, and omega is a coefficient ratio;
and (8): calculating the initial value difference of capacitance
CeThe rated capacitance of the electrical cabinet;
and (9): comparing the capacitance initial value difference with the capacitance initial value difference alarm value, if the capacitance initial value difference alarm value is larger than the capacitance initial value difference alarm value, sending out an alarm of capacitance change abnormity through the alarm unit and the display unit, and if the capacitance change abnormity alarm value is not larger than the capacitance initial value difference alarm value, entering the step (10);
step (10): and uploading information to the remote monitoring center through the communication unit.
Compared with the prior art, the beneficial effects are: the electrical cabinet insulation detection device adopts the induction power supply unit to directly induce and generate electric energy under the condition that the busbar is electrified, does not need to additionally introduce a power supply, is convenient and simple to install, is reliable and safe in power supply, can intelligently collect current and voltage signals, judges the insulation condition of the electrical cabinet according to the collected signal analysis, and timely sends out an alarm when abnormity occurs.
Drawings
Fig. 1 is a position diagram of a busbar, a magnetic core and a winding in the electrical cabinet insulation detection device based on busbar induction power supply.
Detailed Description
The following describes in detail a specific embodiment of the electrical cabinet insulation detection device based on bus bar induction power supply according to the present invention with reference to the accompanying drawings.
The positional relationship among the bus bar 1, the magnetic core 2, and the winding 3 is shown in fig. 1.
The insulation detection device for the electrical cabinet comprises an induction power supply unit, a signal acquisition unit, a signal conditioning unit, an A/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, an alarm unit and a communication unit, wherein the signal acquisition unit is sequentially connected with the signal conditioning unit, the A/D conversion unit and the control processing unit, and the control processing unit is respectively connected with the induction power supply unit, the key input unit, the storage unit, the display unit, the alarm unit and the communication unit; the electrical cabinet insulation detection device provides power through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the electrical cabinet according to the collected signal, and timely sends out an alarm when the insulation abnormality occurs so that a worker can timely make a solution and further guarantee the working reliability of the electrical cabinet.
The induction power supply unit is directly arranged above a busbar in the electrical cabinet and comprises a magnetic core, a winding, a protection module, a rectifying circuit, a first filter circuit, a storage battery and a power supply switch, alternating current voltage is obtained from the busbar through the winding, the smooth direct current voltage is output through the protection module, the rectifying circuit and the first filter circuit in a voltage stabilizing manner, and electric energy storage or output is carried out through the storage battery; and the power supply switch receives a remote control instruction and controls whether to provide a power supply for the electrical cabinet insulation detection device.
The signal acquisition unit adopts a current sensor to acquire leakage current of the electrical cabinet and adopts a voltage sensor to acquire phase voltage.
The signal conditioning unit comprises an amplifying circuit and a second filter circuit, wherein the amplifying circuit amplifies the acquired signal and outputs a signal meeting the input requirement of the A/D conversion unit; the second filter circuit filters high-frequency interference signals by adopting a low-pass filter.
The key input unit is combined with the storage unit and the display unit to carry out parameter setting and information inquiry, and the parameters comprise a leakage current alarm value and an electric capacity initial value difference alarm value.
The alarm unit adopts an audible and visual alarm, and can send out audible and visual alarm signals in time when the electrical cabinet insulation detection device detects abnormality; the communication unit transmits the detection result of the electrical cabinet insulation detection device to a remote monitoring center by adopting a wireless communication technology, and can receive a control instruction of the remote monitoring center to realize remote control and parameter setting.
The invention also provides an electrical cabinet insulation detection method based on bus bar induction power supply, which comprises the following steps:
step (1): controlling the induction power supply unit to supply power to the electrical cabinet insulation detection device;
step (2): collecting the leakage current and the phase voltage;
and (3): amplifying the signal by the amplifying circuit;
and (4): filtering out high-frequency interference signals through the second filter circuit;
and (5): performing A/D conversion by the A/D conversion unit;
and (6): the control processing unit compares the leakage current with the leakage current alarm value, if the leakage current alarm value is larger than the leakage current alarm value, a leakage current high alarm is sent out through the alarm unit and the display unit, and if the leakage current alarm value is not larger than the leakage current alarm value, the step (7) is carried out;
and (7): calculating the capacitance of the main insulation operation state of the electrical cabinet
I is the leakage current, U is the phase voltage, and omega is a coefficient ratio;
and (8): calculating the initial value difference of capacitance
CeThe rated capacitance of the electrical cabinet;
and (9): comparing the capacitance initial value difference with the capacitance initial value difference alarm value, if the capacitance initial value difference alarm value is larger than the capacitance initial value difference alarm value, sending out an alarm of capacitance change abnormity through the alarm unit and the display unit, and if the capacitance change abnormity alarm value is not larger than the capacitance initial value difference alarm value, entering the step (10);
step (10): and uploading information to the remote monitoring center through the communication unit.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The electrical cabinet insulation detection device based on bus bar induction power supply is characterized by comprising an induction power supply unit, a signal acquisition unit, a signal conditioning unit, an A/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, an alarm unit and a communication unit, wherein the signal acquisition unit is sequentially connected with the signal conditioning unit, the A/D conversion unit and the control processing unit, and the control processing unit is respectively connected with the induction power supply unit, the key input unit, the storage unit, the display unit, the alarm unit and the communication unit; the electrical cabinet insulation detection device provides power through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the electrical cabinet according to the collected signal, and timely sends out an alarm when the insulation abnormality occurs so that a worker can timely make a solution and further guarantee the working reliability of the electrical cabinet.
2. The electrical cabinet insulation detection device based on bus bar induction power supply according to claim 1, wherein the induction power supply unit is directly placed above a bus bar in the electrical cabinet, and comprises a magnetic core, a winding, a protection module, a rectification circuit, a first filter circuit, a storage battery and a power supply switch, wherein an alternating current voltage is obtained from the bus bar through the winding, and is subjected to voltage stabilization and output of a smooth direct current voltage through the protection module, the rectification circuit and the first filter circuit, and then is subjected to electrical energy storage or output through the storage battery; and the power supply switch receives a remote control instruction and controls whether to provide a power supply for the electrical cabinet insulation detection device.
3. The electrical cabinet insulation detection device based on bus bar induction power supply according to claim 2, wherein the signal conditioning unit comprises an amplifying circuit and a second filter circuit, the amplifying circuit amplifies the acquired signal and outputs a signal meeting the input requirement of the A/D conversion unit; the second filter circuit filters high-frequency interference signals by adopting a low-pass filter.
4. The electrical cabinet insulation detection device based on bus bar induction power supply according to claim 3, wherein the key input unit is combined with the storage unit and the display unit to perform parameter setting and information query, and the parameters include a leakage current alarm value and a capacitance initial value difference alarm value.
5. The detection method for the insulation detection device of the electrical cabinet based on the bus bar induction power supply according to any one of claims 1 to 4, wherein the detection method comprises the following steps:
step (1): controlling the induction power supply unit to supply power to the electrical cabinet insulation detection device;
step (2): collecting leakage current and phase voltage;
and (3): amplifying the signal by the amplifying circuit;
and (4): filtering out high-frequency interference signals through the second filter circuit;
and (5): performing A/D conversion by the A/D conversion unit;
and (6): the control processing unit compares the leakage current with the leakage current alarm value, if the leakage current alarm value is larger than the leakage current alarm value, a leakage current high alarm is sent out through the alarm unit and the display unit, and if the leakage current alarm value is not larger than the leakage current alarm value, the step (7) is carried out;
and (7): calculating the capacitance of the main insulation operation state of the electrical cabinet
I is the leakage current, U is the phase voltage, and omega is a coefficient ratio;
and (8): calculating the initial value difference of capacitance
CeThe rated capacitance of the electrical cabinet;
and (9): comparing the capacitance initial value difference with the capacitance initial value difference alarm value, if the capacitance initial value difference alarm value is larger than the capacitance initial value difference alarm value, sending out an alarm of capacitance change abnormity through the alarm unit and the display unit, and if the capacitance change abnormity alarm value is not larger than the capacitance initial value difference alarm value, entering the step (10);
step (10): and uploading information to the remote monitoring center through the communication unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011248775.2A CN112394297A (en) | 2020-11-10 | 2020-11-10 | Electrical cabinet insulation detection device and method based on bus bar induction power supply |
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| CN202011248775.2A CN112394297A (en) | 2020-11-10 | 2020-11-10 | Electrical cabinet insulation detection device and method based on bus bar induction power supply |
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