CN201662602U - Insulated on-line detection instrument of neutral point grounding high-voltage electric power system - Google Patents
Insulated on-line detection instrument of neutral point grounding high-voltage electric power system Download PDFInfo
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- CN201662602U CN201662602U CN2009203523797U CN200920352379U CN201662602U CN 201662602 U CN201662602 U CN 201662602U CN 2009203523797 U CN2009203523797 U CN 2009203523797U CN 200920352379 U CN200920352379 U CN 200920352379U CN 201662602 U CN201662602 U CN 201662602U
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 title abstract description 5
- 238000009413 insulation Methods 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses an insulated on-line detection instrument of a neutral point grounding high-voltage electric power system, which not only can carry out a test during the operation of a high-voltage electric power system, but also can carry out the test in shutdown standby. The instrument comprises three phases A, B and C of a plant-power bus bar, a grounding resistor R0, a grounding transformer T and an electromotor M. The utility model is characterized in that the input end of the grounding transformer T1 is connected with the three phases A, B and C of the plant-power bus bar, the output end of the grounding transformer T1 is connected with one end of the grounding resistor R0, and the other end of the grounding resistor R0 is respectively connected with a capacitor C and the input end of an I detection instrument; three phases a, b and c of a power wire inlet terminal of the electromotor M are provided with a II detector; and the three phases A, B and C of the plant-power bus bar are connected with a voltage transformer Pt the neutral point of which is grounded via being connected with a capacitor Ct.
Description
Technical field
The utility model relates to a kind of high-voltage power system insulation detector, relates in particular to a kind of neutral ground high-voltage power system insulation online detector.
Background technology
When high voltage electric equipment moves in electrical network, if its inner insulation defect bad because of making, aging and that outside destroy causes, insulation fault of can make a difference equipment and electric power netting safe running of existing.Therefore, after equipment put into operation, traditional way was regularly to have a power failure to carry out preventive trial and maintenance, so that in time detect the insulation defect of device interior, prevents insulation fault.The subject matter that this maintenance system exists has:
1, the equipment test that must have a power failure, thus the operational efficiency of equipment can not be improved effectively;
2, need to be equipped with high performance testing equipment, a large amount of power failure work formality that professional and technical personnel, workload are big, the working time is long and loaded down with trivial details etc., to have caused the waste and the unreasonable distribution of resource;
3, equipment is carried out periodic maintenance and have certain blindness, so that too much unnecessary interruption maintenance occurred, even premature damage too much occurs because of dismounting, assembling etc.
Dc superposition method of the prior art, DC component method and leakage current testing all are at a certain SI semi-insulation test in the system.Dc superposition method is the insulation situation of certain section cable in the measuring system; The DC component method also is the insulation situation of certain section cable in the measuring system; The method of testing of leakage current is to measure at certain insulation of Electric Motor, and measures just not energy measurement insulation when motor has a power failure can only be the motor operation time.
Summary of the invention
The utility model is in order to solve the deficiencies in the prior art, provide a kind of both can be in high-voltage electric power system test in service, also can be at the neutral ground high-voltage power system insulation online detector of shutting down test when standby.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is: comprise station service bus ABC three-phase, stake resistance R0, grounding transformer T and motor M, its characteristics are that the input end of described grounding transformer T1 is connected with described station service bus ABC three, described grounding transformer T1 output terminal is connected with described stake resistance R0 one end, and the described stake resistance R0 other end connects first capacitor C and the first detector input end respectively; Second detector is installed on the described motor M power inleting terminal abc three-phase; Described station service bus ABC three is connected and goes up neutral point by connecting the voltage transformer (VT) Pt of the second capacitor C t ground connection.
The above-mentioned first detector input end is connected with high-tension resistive R1, and described first detector is provided with earth point.
The above-mentioned first capacitor C other end ground connection.
The above-mentioned second detector input end L2 connects on the described motor M power inleting terminal abc three-phase after dividing three the tunnel to connect 3 high-tension resistive R2 again, and the described first detector first input end C1 is connected with the current transformer T2 that is sleeved on described motor M with the second input end C2.
The beneficial effects of the utility model are: by being installed on the station service bus first detector and being installed in last second detector of motor M, the detection high-voltage electric power system is in operation or shuts down the insulation values of equipment when standby, thereby can in time fix a breakdown.Simple in structure, it is convenient to measure, and saves the test duration, has reduced the trouble of shutting down installation.
Description of drawings
Fig. 1 is a wiring schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is made and to further specify:
As shown in Figure 1, the utility model comprises station service bus ABC three-phase, stake resistance R0 and grounding transformer T1 and motor M, the input end of described grounding transformer T1 is connected with described station service bus ABC three, described grounding transformer T1 output terminal is connected with described stake resistance R0 one end, the described stake resistance R0 other end is told two-way, 1 the tunnel connects first capacitor C, the first capacitor C other end ground connection.1 the tunnel connects the high-tension resistive R1 of the first detector input end, and the high-tension resistive R1 other end is connected with the described first detector input end that is provided with earth point again.Described motor M end of incoming cables abc three-phase is connected with described station service bus ABC three, be connected with the described second detector input end L2 by 3 high-tension resistive R2 on the abc three-phase of described motor M end of incoming cables simultaneously, the described second detector first input end C1 and the second input end C2 are connected with current transformer T2 on being sleeved on described motor M, and described second detector is provided with earth terminal.Current transformer T2 is sleeved on three inlet wires of described motor M.Can connect a plurality of described motor M simultaneously on the described station service bus ABC three-phase, described second detector all is housed on each motor M.Described station service bus ABC three is connected and goes up neutral point by connecting the voltage transformer (VT) Pt of the second capacitor C t ground connection, and the second capacitor C t is a capacitance.First detector and the second detector input end high-tension resistive can be selected the resistance of same model for use.When system works, bus and each motor are all charged, and first detector is injected into high voltage direct current in the total system by the L1 end, thereby obtain the insulation values of total system by the DC current of measuring earth terminal, comprise bus and Ge Tai motor.At this moment, it is in running order that the second all detectors all detects motor automatically, just stop to inject high voltage direct current to described motor M, and begin to detect the leakage current of motor M, detected leakage current value is presented on the liquid crystal display by the described second detector L2 input end.Just can be when the system insulation value of first detector demonstration is on the low side by checking each second detector, the leakage current of seeing which platform demonstration is on the low side, on the low side just shows that this TV station motor M insulation has had problem, if the leakage current of every second detector is all normal, be that the insulation of system busbar has had problem with regard to showing.When bus is in cold standby, bus is not charged, each motor M is not connected on the bus, and the high-tension resistive R1 of first detector by first detector injects the high voltage direct current of 1500V to system, obtains the insulation values of system by measuring the ground connection DC current of contacting to earth then.When motor is in cold standby, motor M is not connected on the bus, not charged yet, at this moment, second detector stops the detection of leakage current, beginning is injected high-tension current to the input end L2 of second detector end to three phase windings of motor M by 3 high-tension resistive R2 of this end, thereby obtains the cold standby insulation values of motor M by the DC current of measuring earth terminal.
Claims (4)
1. neutral ground high-voltage power system insulation online detector, comprise station service bus (ABC) three-phase, stake resistance (R0), grounding transformer (T1) and motor (M), it is characterized in that: the input end of described grounding transformer (T1) is connected described grounding transformer with described station service bus (ABC) three
(T1) output terminal is connected with described stake resistance (R0) end, and described stake resistance (R0) other end connects first electric capacity (C) and the first detector input end respectively; Second detector is installed on described motor (M) power inleting terminal (abc) three-phase; Described station service bus (ABC) three-phase is connected with neutral point by connecting the voltage transformer (VT) (Pt) of second electric capacity (Ct) ground connection.
2. according to the described neutral ground high-voltage power system insulation online detector of claim 1, it is characterized in that: the described first detector input end (L1) is connected with high-tension resistive (R1), and described first detector is provided with earth point.
3. according to the described neutral ground high-voltage power system insulation online detector of claim 1, it is characterized in that: described first electric capacity (C) other end ground connection.
4. according to the described neutral ground high-voltage power system insulation online detector of claim 1, it is characterized in that: the described second detector input end (L2) connects on described motor (M) power inleting terminal (abc) three-phase after dividing three the tunnel to connect 3 high-tension resistives (R2) again, and the described second detector first input end (C1) and second input end (C2) are connected with current transformer (T2) on being sleeved on described motor (M).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203523797U CN201662602U (en) | 2009-12-24 | 2009-12-24 | Insulated on-line detection instrument of neutral point grounding high-voltage electric power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203523797U CN201662602U (en) | 2009-12-24 | 2009-12-24 | Insulated on-line detection instrument of neutral point grounding high-voltage electric power system |
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| Publication Number | Publication Date |
|---|---|
| CN201662602U true CN201662602U (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203523797U Expired - Fee Related CN201662602U (en) | 2009-12-24 | 2009-12-24 | Insulated on-line detection instrument of neutral point grounding high-voltage electric power system |
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| CN (1) | CN201662602U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472353A (en) * | 2013-09-26 | 2013-12-25 | 国网河南省电力公司南阳供电公司 | Method for seeking direct-current cross |
| CN105676092A (en) * | 2016-03-29 | 2016-06-15 | 中国石油大学(北京) | Method and system for monitoring insulation level of substation power cable |
| CN111257644A (en) * | 2020-04-01 | 2020-06-09 | 南京传积兴自动化科技有限公司 | On-line monitoring circuit and monitoring system for ground insulation resistance of high-voltage power grid |
-
2009
- 2009-12-24 CN CN2009203523797U patent/CN201662602U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472353A (en) * | 2013-09-26 | 2013-12-25 | 国网河南省电力公司南阳供电公司 | Method for seeking direct-current cross |
| CN103472353B (en) * | 2013-09-26 | 2016-02-03 | 国网河南新野县供电公司 | A kind of method of searching direct current swinging cross |
| CN105676092A (en) * | 2016-03-29 | 2016-06-15 | 中国石油大学(北京) | Method and system for monitoring insulation level of substation power cable |
| CN105676092B (en) * | 2016-03-29 | 2018-11-16 | 中国石油大学(北京) | Electric substation's power cable insulation level monitoring method and system |
| CN111257644A (en) * | 2020-04-01 | 2020-06-09 | 南京传积兴自动化科技有限公司 | On-line monitoring circuit and monitoring system for ground insulation resistance of high-voltage power grid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG SINOKN TONGLI ELECTRIC TECHNOLOGY CO., LT Free format text: FORMER OWNER: WEI ZENGXIA Effective date: 20130105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 250200 JINAN, SHANDONG PROVINCE TO: 250216 JINAN, SHANDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130105 Address after: 250216 Longshan District Office, Shandong, Zhangqiu Patentee after: Shandong qingneng Tongli Electrical Technology Co. Ltd. Address before: 250200, Longshan Street office, Zhangqiu, Shandong Province, No. 29, Licun front street Patentee before: Wei Zengxia |
|
| DD01 | Delivery of document by public notice |
Addressee: Gao Xiangdong Document name: Notification of Passing Examination on Formalities |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 250216 Longshan District Office, Shandong, Zhangqiu Patentee after: Cleanergy Technology Co. Ltd. Address before: 250216 Longshan District Office, Shandong, Zhangqiu Patentee before: Shandong qingneng Tongli Electrical Technology Co. Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Cleanergy Technology Co. Ltd. Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Cleanergy Technology Co. Ltd. Document name: Notification of Termination of Patent Right |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20171224 |