CN202393837U - Cable dielectric loss measuring device based on frequency conversion series resonance - Google Patents
Cable dielectric loss measuring device based on frequency conversion series resonance Download PDFInfo
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- CN202393837U CN202393837U CN2011203819435U CN201120381943U CN202393837U CN 202393837 U CN202393837 U CN 202393837U CN 2011203819435 U CN2011203819435 U CN 2011203819435U CN 201120381943 U CN201120381943 U CN 201120381943U CN 202393837 U CN202393837 U CN 202393837U
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Abstract
The utility model discloses a cable dielectric loss measuring device based on frequency conversion series resonance. The cable dielectric loss measuring device comprises a series resonance apparatus and a measuring apparatus. The series resonance apparatus comprises an AC power supply, an excitation transformer and a resonance reactor, wherein a test sample is connected with the resonance reactor in series. High voltage is provided for the two ends of the test sample after the AC power supply passes across the excitation transformer and the resonance reactor. The measuring apparatus comprises a current voltage sampling unit, a signal conversion isolation unit, an A/D synchronization sampling unit, a single-chip microcomputer control unit, and a signal processing unit. The cable dielectric loss measuring device of the utility model is simple in operation and allows the dielectric loss of a cable to be measured conveniently.
Description
Technical field
The utility model belongs to field of power, more particularly, relates to a kind of power cable dielectric device based on variable-frequency series-resonance.
Background technology
Power cable is the important equipment for power transmission and distribution of electric system, large enterprise, and the insulating property of its insulation course are along with the time of operation and the variation of environment also can constantly change, so the detection of the insulating property of power cable insulation layer is extremely important.
The deficiency of present prior art:
(1) existing checkout equipment is to adopt the method for series resonance to do the high pressure withstand voltage test, and the employed equipment volume of this method is big, voltage is high, operating difficulties.
(2) existing detection method can only detection streamer whether can be through withstand voltage test, and dielectric loss that can not detection streamer.
The utility model content
For this reason, the utility model purpose provides a kind of simple to operate, and the power cable dielectric device based on variable-frequency series-resonance of ability detection streamer dielectric loss.
The technical scheme that the utility model adopted is following: a kind of power cable dielectric device based on variable-frequency series-resonance comprises:
Series resonant equipment is in series with the test test product, is used for producing high voltage at test test product two ends;
Measurement mechanism is connected with said test test product, is used for the voltage and current signal of collecting test test product, and through calculating the dielectric loss of test test product, said proving installation comprises:
The current/voltage sampling unit is used for obtaining the current and voltage signals of the test test product of series resonant equipment;
The signal transformation isolated location is connected with said current/voltage sampling unit, is used for filtering out the undesired signals such as spike of tested current and voltage signals;
A/D synchronized sampling unit is connected with said signal transformation isolated location, is used for tested analog signal conversion is become digital signal;
Signal processing unit is connected with said A/D synchronized sampling unit, is used for the voltage and current signal that is collected is carried out computing, draws the dielectric loss of test test product, which is provided with the man-machine interface that is used to operate and show test test product result.
Said series resonant equipment comprises AC power, exciting transformer resonant reactor, and said test test product is in series with said resonance reactor.
Also comprise the Single-chip Controlling unit in the said measurement mechanism, said Single-chip Controlling unit connects with AC power, is used to control the electric voltage frequency of said AC power output.
The output voltage frequency of the said AC power of said Single-chip Controlling unit controls is 20～300Hz.
Also be provided with printout and communication interface in the said measurement mechanism, be used for the dielectric loss of resulting test test product is carried out data printing and data output.
The technique scheme of the utility model is compared prior art and is had the following advantages:
1, the utility model adopts Single-chip Controlling AC frequency conversion power source voltage frequency, and the voltage-regulation scope is big, is convenient to realize testing the security measurement of test product.
2, through the voltage and current signal of being gathered is carried out computing, directly obtain the cable dielectric loss of test test product, simple.
Description of drawings
For the content that makes the utility model is more clearly understood,, the utility model is done further detailed explanation, wherein below according to the specific embodiment of the utility model and combine accompanying drawing
Fig. 1 is the utility model schematic diagram.
Fig. 2 is the current/voltage sampling detector among Fig. 1;
Fig. 3 is the signal transformation buffer circuit figure among Fig. 1;
Fig. 4 is an A/D synchronized sampling circuit diagram among Fig. 1.
Embodiment
As shown in Figure 1: the utility model mainly comprises: series resonant equipment and measurement mechanism; Series resonant equipment wherein mainly comprises AC frequency conversion power supply, exciting transformer and resonance reactor; Test test product wherein is in series with resonance reactor, the AC frequency conversion power supply through exciting transformer resonant reactor after for the test test product two ends high voltage is provided.
Measurement mechanism comprises current/voltage sampling unit, signal transformation isolated location, A/D synchronized sampling unit, Single-chip Controlling unit and signal processing unit.
Current/voltage sampling unit wherein is made up of the current/voltage sampling detector, and is as shown in Figure 2, is used for obtaining the current and voltage signals of the test test product of series resonant equipment; The signal transformation isolated location is made up of the signal transformation buffer circuit, and is as shown in Figure 3, is connected with the current/voltage sampling unit, is used for filtering out the undesired signals such as spike of signal.
A/D synchronized sampling unit is made up of A/D synchronized sampling circuit, and is as shown in Figure 4, is connected with the signal transformation isolated location, is used for tested analog signal conversion is become digital signal, so that single-chip microcomputer reads.
Signal processing unit is connected with said A/D synchronized sampling collecting unit, is used for the voltage and current signal that is collected is carried out computing, draws the dielectric loss of test test product, which is provided with the man-machine interface that is used to operate and show test test product result.
The Single-chip Controlling unit connects with AC power, is used to control the electric voltage frequency of AC power output, and the electric voltage frequency output valve of AC power wherein is 20～300Hz.
In addition, also be provided with printout and communication interface in the measurement mechanism, be used for the dielectric loss of resulting test test product is carried out data printing and data output.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (5)
1. power cable dielectric device based on variable-frequency series-resonance comprises:
Series resonant equipment is in series with the test test product, is used for producing high at test test product two ends
Voltage;
Measurement mechanism is connected with said test test product, is used for the voltage and current signal of collecting test test product, and through calculating the dielectric loss of test test product, it is characterized in that:
Said proving installation comprises:
The current/voltage sampling unit is used for obtaining the current and voltage signals of the test test product of series resonant equipment;
The signal transformation isolated location is connected with said current/voltage sampling unit, is used for filtering out the spike undesired signal of current and voltage signals;
A/D synchronized sampling unit is connected with said signal transformation isolated location, is used for tested analog signal conversion is become digital signal;
Signal processing unit is connected with said A/D synchronized sampling unit, is used for the voltage and current signal that is collected is carried out computing, draws the dielectric loss of test test product, which is provided with the man-machine interface that is used to operate and show test test product result.
2. the power cable dielectric device based on variable-frequency series-resonance according to claim 1 is characterized in that:
Said series resonant equipment comprises AC frequency conversion power supply, exciting transformer resonant reactor, and said test test product is in series with said resonance reactor.
3. the power cable dielectric device based on variable-frequency series-resonance according to claim 1 and 2 is characterized in that:
Also comprise the Single-chip Controlling unit in the said measurement mechanism, said Single-chip Controlling unit connects with the AC frequency conversion power supply, is used to control the electric voltage frequency of said AC power output.
4. the power cable dielectric device based on variable-frequency series-resonance according to claim 3 is characterized in that:
The output voltage frequency of the said AC frequency conversion power supply of said Single-chip Controlling unit controls is 20～300Hz.
5. the power cable dielectric device based on variable-frequency series-resonance according to claim 4 is characterized in that:
Also be provided with printout and communication interface in the said measurement mechanism, be used for the dielectric loss of resulting test test product is carried out data printing and data output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203819435U CN202393837U (en) | 2011-10-10 | 2011-10-10 | Cable dielectric loss measuring device based on frequency conversion series resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203819435U CN202393837U (en) | 2011-10-10 | 2011-10-10 | Cable dielectric loss measuring device based on frequency conversion series resonance |
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| Publication Number | Publication Date |
|---|---|
| CN202393837U true CN202393837U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203819435U Expired - Fee Related CN202393837U (en) | 2011-10-10 | 2011-10-10 | Cable dielectric loss measuring device based on frequency conversion series resonance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308775A (en) * | 2013-03-27 | 2013-09-18 | 浙江省电力公司舟山电力局 | Device and method for testing armor loss of alternating current submarine power cable |
| CN104965160A (en) * | 2015-05-29 | 2015-10-07 | 广西电网有限责任公司电力科学研究院 | Cable partial discharge detection method and detection apparatus |
| CN104965159A (en) * | 2015-05-29 | 2015-10-07 | 广西电网有限责任公司电力科学研究院 | Cable insulation state voltage-withstanding detection method and detection apparatus |
| CN105004971A (en) * | 2015-05-29 | 2015-10-28 | 广西电网有限责任公司电力科学研究院 | Method and apparatus for detecting insulating medium spectrum and insulating state withstand voltage of cable |
| CN105044564A (en) * | 2015-05-29 | 2015-11-11 | 广西电网有限责任公司电力科学研究院 | Method and device for detecting cable insulation dielectric spectrum |
| CN113625057A (en) * | 2021-08-11 | 2021-11-09 | 保定腾远电力科技有限公司 | Power cable dielectric loss testing device based on resonance characteristics |
-
2011
- 2011-10-10 CN CN2011203819435U patent/CN202393837U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308775A (en) * | 2013-03-27 | 2013-09-18 | 浙江省电力公司舟山电力局 | Device and method for testing armor loss of alternating current submarine power cable |
| CN103308775B (en) * | 2013-03-27 | 2015-10-28 | 浙江省电力公司舟山电力局 | A kind of devices and methods therefor testing interchange sea electric power cable loss induced by armour |
| CN104965160A (en) * | 2015-05-29 | 2015-10-07 | 广西电网有限责任公司电力科学研究院 | Cable partial discharge detection method and detection apparatus |
| CN104965159A (en) * | 2015-05-29 | 2015-10-07 | 广西电网有限责任公司电力科学研究院 | Cable insulation state voltage-withstanding detection method and detection apparatus |
| CN105004971A (en) * | 2015-05-29 | 2015-10-28 | 广西电网有限责任公司电力科学研究院 | Method and apparatus for detecting insulating medium spectrum and insulating state withstand voltage of cable |
| CN105044564A (en) * | 2015-05-29 | 2015-11-11 | 广西电网有限责任公司电力科学研究院 | Method and device for detecting cable insulation dielectric spectrum |
| CN105044564B (en) * | 2015-05-29 | 2017-11-07 | 广西电网有限责任公司电力科学研究院 | A kind of cable insulation medium spectrum detection method and device |
| CN105004971B (en) * | 2015-05-29 | 2017-11-07 | 广西电网有限责任公司电力科学研究院 | A kind of cable insulation medium spectrum and state of insulation resistance test method and device |
| CN104965160B (en) * | 2015-05-29 | 2018-01-23 | 广西电网有限责任公司电力科学研究院 | A kind of cable local discharge detection method and detection means |
| CN104965159B (en) * | 2015-05-29 | 2018-06-22 | 广西电网有限责任公司电力科学研究院 | A kind of cable insulation state resistance test method and detection device |
| CN113625057A (en) * | 2021-08-11 | 2021-11-09 | 保定腾远电力科技有限公司 | Power cable dielectric loss testing device based on resonance characteristics |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LI WENAN Free format text: FORMER OWNER: WUHAN BEILIAN MEASUREMENT AND CONTROL TECHNOLOGY CO., LTD. Effective date: 20130530 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430070 WUHAN, HUBEI PROVINCE TO: 430071 WUHAN, HUBEI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130530 Address after: East Lake road 430071 in Hubei province Wuhan city Wuchang District No. 8-66-1-101 Patentee after: Li Wenan Address before: 430070, No. 2, building 201, block B, Wenchang building, No. 1, Wuhan Avenue, 3 Optics Valley Avenue, East Lake hi tech Development Zone, Hubei, China Patentee before: Wuhan Beilian Measurement Control Technology Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: ZHONGSHAN GUOXIANG ELECTRIC CO., LTD. Free format text: FORMER OWNER: LI WENAN Effective date: 20130922 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430071 WUHAN, HUBEI PROVINCE TO: 528400 ZHONGSHAN, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130922 Address after: 528400, Guangdong, Zhongshan Torch Development Zone, Zhongshan Port Road, No. 70, 8, one of the four floor of the factory building Patentee after: Zhongshan state wish Electric Co., Ltd. Address before: East Lake road 430071 in Hubei province Wuhan city Wuchang District No. 8-66-1-101 Patentee before: Li Wenan |
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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: 20120822 Termination date: 20161010 |