CN110879338A - High-voltage power equipment insulation detection system based on inductive power supply and detection method thereof - Google Patents
High-voltage power equipment insulation detection system based on inductive power supply and detection method thereof Download PDFInfo
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- CN110879338A CN110879338A CN201911227819.0A CN201911227819A CN110879338A CN 110879338 A CN110879338 A CN 110879338A CN 201911227819 A CN201911227819 A CN 201911227819A CN 110879338 A CN110879338 A CN 110879338A
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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
- G01R31/1227—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 of components, parts or materials
Abstract
The invention provides an insulation detection system of high-voltage power equipment based on 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 providing power for the high-voltage power equipment; the high-voltage power equipment insulation detection system realizes electromagnetic induction power supply through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the high-voltage power equipment according to collected current and voltage signals, and sends out alarm signals and sends the alarm signals to a monitoring center when the abnormality occurs so that a worker can make solutions in time and further guarantee the working reliability of the high-voltage power equipment. The invention provides an insulation detection system and method of high-voltage power equipment based on induction power supply, which effectively improve the reliability of the insulation detection system by adopting a power supply mode of induction energy acquisition.
Description
Technical Field
The invention belongs to the technical field of power detection, and particularly relates to an insulation detection system of high-voltage power equipment based on inductive power supply and a detection method thereof.
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 high-voltage equipment is used as an important component of a power system, and the safe and reliable operation of the high-voltage equipment is an important guarantee of the 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 an intelligent high-voltage power equipment insulation detection system based on induction power supply, which adopts a current transformer to obtain cable electric energy, is reliable and safe in power supply, can intelligently collect current and voltage signals, analyzes and judges the insulation condition of high-voltage power equipment according to the collected signals, and timely sends out an alarm when abnormality occurs, thereby effectively improving the working reliability of the high-voltage power equipment.
Disclosure of Invention
The invention provides an insulation detection system and method of high-voltage power equipment based on induction power supply, which effectively improve the reliability of the insulation detection system by adopting a power supply mode of induction energy acquisition.
The invention particularly relates to an insulation detection system of high-voltage power equipment based on 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; the high-voltage power equipment insulation detection system realizes electromagnetic induction power supply through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the high-voltage power equipment according to collected current and voltage signals, and sends out alarm signals and sends the alarm signals to a monitoring center when the abnormality occurs so that a worker can make solutions in time and further guarantee the working reliability of the high-voltage power equipment.
The induction power supply unit comprises an energy taking coil, a protection unit, a rectifying circuit, a first filter circuit and a storage battery, alternating current voltage is obtained from an inlet cable of the high-voltage power equipment through the energy taking coil, the smooth direct current voltage is output in a voltage stabilizing mode through the protection unit, the rectifying circuit and the first filter circuit, and electric energy storage or output is carried out through the storage battery;
the energy taking coil adopts an open-type current transformer; the protection unit adopts a transient suppression diode to prevent the induction power supply unit from inducing very high impact voltage to cause danger when the tested circuit is in fault; the storage battery adopts a lithium battery.
The signal acquisition unit adopts a current sensor to acquire main insulation leakage current of a three-phase sleeve of the high-voltage power equipment, adopts a voltage sensor to acquire phase voltage of the high-voltage power equipment, and the current sensor is installed on a tail screen ground wire of each phase of sleeve of the high-voltage power equipment.
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 insulation detection system is abnormal; the communication unit transmits the detection result of the insulation detection system to the monitoring center by adopting a wireless communication technology, and can receive a control instruction of the monitoring center to realize remote control and parameter setting.
The invention also provides a detection method of the high-voltage power equipment insulation detection system based on induction power supply, which comprises the following steps:
step (1): the signal acquisition unit acquires main insulation leakage current and phase voltage of a three-phase sleeve of the high-voltage power equipment;
step (2): amplifying the signal by the amplifying module;
and (3): filtering out high-frequency interference signals through the filtering module;
and (4): performing A/D conversion by the A/D conversion unit;
and (5): the control processing unit compares the leakage current signal with the leakage current alarm value, if the leakage current signal 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 signal is not larger than the leakage current alarm value, the step (6) is carried out;
and (6): calculating the capacitance of the main insulation operation state of the high-voltage power equipment
I is the leakage current signal, U is the phase voltage signal, and omega is a coefficient ratio;
and (7): calculating the initial value difference of capacitance
CeRated capacitance for the high voltage power equipment;
and (8): 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 (9);
and (9): and uploading information to the monitoring center through the communication unit.
Drawings
Fig. 1 is a schematic structural diagram of an insulation detection system for high-voltage power equipment based on inductive power supply according to the present invention.
Fig. 2 is a working flow chart of a detection method of the high-voltage power equipment insulation detection system based on inductive power supply.
Detailed Description
The following describes in detail a specific embodiment of the insulation detection system for high voltage power equipment based on inductive power supply according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the insulation detection system for high-voltage power equipment of the invention includes 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 further connected with the induction power supply unit, the key input unit, the storage unit, the display unit, the alarm unit and the communication unit respectively; the high-voltage power equipment insulation detection system realizes electromagnetic induction power supply through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the high-voltage power equipment according to collected current and voltage signals, and sends out alarm signals and sends the alarm signals to a monitoring center when the abnormality occurs so that a worker can make solutions in time and further guarantee the working reliability of the high-voltage power equipment.
The induction power supply unit comprises an energy taking coil, a protection unit, a rectifying circuit, a first filter circuit and a storage battery, alternating current voltage is obtained from an inlet cable of the high-voltage power equipment through the energy taking coil, the smooth direct current voltage is output in a voltage stabilizing mode through the protection unit, the rectifying circuit and the first filter circuit, and electric energy storage or output is carried out through the storage battery;
the energy taking coil adopts an open-type current transformer; the protection unit adopts a transient suppression diode to prevent the induction power supply unit from inducing very high impact voltage to cause danger when the tested circuit is in fault; the storage battery adopts a lithium battery.
The signal acquisition unit adopts a current sensor to acquire main insulation leakage current of a three-phase sleeve of the high-voltage power equipment, adopts a voltage sensor to acquire phase voltage of the high-voltage power equipment, and the current sensor is installed on a tail screen ground wire of each phase of sleeve of the high-voltage power equipment.
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 insulation detection system is abnormal; the communication unit transmits the detection result of the insulation detection system to the monitoring center by adopting a wireless communication technology, and can receive a control instruction of the monitoring center to realize remote control and parameter setting.
As shown in fig. 2, the present invention further provides a detection method of an insulation detection system for high voltage power equipment based on inductive power supply, where the detection method includes the following steps:
step (1): the signal acquisition unit acquires main insulation leakage current and phase voltage of a three-phase sleeve of the high-voltage power equipment;
step (2): amplifying the signal by the amplifying module;
and (3): filtering out high-frequency interference signals through the filtering module;
and (4): performing A/D conversion by the A/D conversion unit;
and (5): the control processing unit compares the leakage current signal with the leakage current alarm value, if the leakage current signal 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 signal is not larger than the leakage current alarm value, the step (6) is carried out;
and (6): calculating the capacitance of the main insulation operation state of the high-voltage power equipment
I is the leakage current signal, U is the phase voltage signal, and omega is a coefficient ratio;
and (7): calculating the initial value difference of capacitance
CeRated capacitance for the high voltage power equipment;
and (8): 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 (9);
and (9): and uploading information to the 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 (7)
1. The high-voltage power equipment insulation detection system based on 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 also 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 high-voltage power equipment insulation detection system realizes electromagnetic induction power supply through the induction power supply unit, analyzes and judges whether insulation abnormality exists in the high-voltage power equipment according to collected current and voltage signals, and sends out alarm signals and sends the alarm signals to a monitoring center when the abnormality occurs so that a worker can make solutions in time and further guarantee the working reliability of the high-voltage power equipment.
2. The high-voltage power equipment insulation detection system based on induction power supply of claim 1, wherein the induction power supply unit comprises an energy-taking coil, a protection unit, a rectification circuit, a first filter circuit and a storage battery, wherein an alternating current voltage is obtained from an inlet cable of the high-voltage power equipment through the energy-taking coil, a smooth direct current voltage is output through voltage stabilization of the protection unit, the rectification circuit and the first filter circuit, and electric energy storage or output is performed through the storage battery;
the energy taking coil adopts an open-type current transformer; the protection unit adopts a transient suppression diode to prevent the induction power supply unit from inducing very high impact voltage to cause danger when the tested circuit is in fault; the storage battery adopts a lithium battery.
3. The system for detecting the insulation of the high-voltage power equipment based on the induction power supply as claimed in claim 2, wherein the signal acquisition unit adopts a current sensor to acquire the main insulation leakage current of the three-phase bushing of the high-voltage power equipment, adopts a voltage sensor to acquire the phase voltage of the high-voltage power equipment, and the current sensor is installed on the end screen ground wire of each phase of the bushing of the high-voltage power equipment.
4. The system for detecting the insulation of the high-voltage power equipment based on the induction power supply as claimed in claim 3, wherein the signal conditioning unit comprises an amplifying circuit and a second filter circuit, the amplifying circuit amplifies the collected 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.
5. The insulation detecting system for high voltage power equipment as claimed in claim 4, 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.
6. The insulation detection system for the high-voltage power equipment as claimed in claim 5, wherein the alarm unit adopts an audible and visual alarm, and can give out an audible and visual alarm signal in time when the insulation detection system is abnormal; the communication unit transmits the detection result of the insulation detection system to the monitoring center by adopting a wireless communication technology, and can receive a control instruction of the monitoring center to realize remote control and parameter setting.
7. The detection method of the insulation detection system of the high voltage power equipment according to any one of claims 1 to 6, characterized in that the detection method comprises the steps of:
step (1): the signal acquisition unit acquires main insulation leakage current and phase voltage of a three-phase sleeve of the high-voltage power equipment;
step (2): amplifying the signal by the amplifying module;
and (3): filtering out high-frequency interference signals through the filtering module;
and (4): performing A/D conversion by the A/D conversion unit;
and (5): the control processing unit compares the leakage current signal with the leakage current alarm value, if the leakage current signal 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 signal is not larger than the leakage current alarm value, the step (6) is carried out;
and (6): calculating the capacitance of the main insulation operation state of the high-voltage power equipment
I is the leakage current signal, U is the phase voltage signal, and omega is a coefficient ratio;
and (7): calculating the initial value difference of capacitance
CeRated capacitance for the high voltage power equipment;
and (8): 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 (9);
and (9): and uploading information to the monitoring center through the communication unit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112345932A (en) * | 2020-11-20 | 2021-02-09 | 国网江苏省电力有限公司盐城供电分公司 | Intelligent detection system and detection method for high-voltage circuit breaker |
| CN112394297A (en) * | 2020-11-10 | 2021-02-23 | 国网江苏省电力有限公司盐城供电分公司 | Electrical cabinet insulation detection device and method based on bus bar induction power supply |
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- 2019-12-04 CN CN201911227819.0A patent/CN110879338A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521335A (en) * | 2018-11-16 | 2019-03-26 | 国网江苏省电力有限公司盐城供电分公司 | It is a kind of to take the high-voltage cable insulating state on-line detecting system that powered based on self-induction |
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| 陈建鹏等: "电容式高压套管绝缘状态诊断", 《电气时代》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394297A (en) * | 2020-11-10 | 2021-02-23 | 国网江苏省电力有限公司盐城供电分公司 | Electrical cabinet insulation detection device and method based on bus bar induction power supply |
| CN112345932A (en) * | 2020-11-20 | 2021-02-09 | 国网江苏省电力有限公司盐城供电分公司 | Intelligent detection system and detection method for high-voltage circuit breaker |
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Application publication date: 20200313 |
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