CN106405323A - Single port measurement calibration model based cable sweep frequency positioning analyzing system and method - Google Patents
Single port measurement calibration model based cable sweep frequency positioning analyzing system and method Download PDFInfo
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- CN106405323A CN106405323A CN201610695612.6A CN201610695612A CN106405323A CN 106405323 A CN106405323 A CN 106405323A CN 201610695612 A CN201610695612 A CN 201610695612A CN 106405323 A CN106405323 A CN 106405323A
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- signal
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- single port
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
Abstract
The invention relates to a single port measurement calibration model based cable sweep frequency positioning analyzing system and method wherein the system comprises a signal receiving and sending unit and a single port calibration model. The signal receiving and sending unit is provided with a signal emitter, a signal coupler and a signal receiver. The signal emitter generates a signal with certain frequency and sends it to the signal coupler. The signal coupler acts the emitted signal onto a to-be-detected cable hung at its end and receives the reflection signal from the cable. The signal coupler is used to separate the emitted signal and the reflection signal. The signal receiver is used to receive the reflection signal and the emitted signal and outputs the amplitude ratio of the two and their phase difference as measurement data. The single port calibration model is connected with the signal receiver. According to the application of the signal flow graph theory on the expression of the single port calibration model, the measurement data is analyzed; the position with damage or breakage is located; therefore, complete cable data analysis can be realized.
Description
Technical field
The present invention relates to a kind of power cable monitoring field and in particular to a kind of based on single port measure calibrating patterns electricity
Cable frequency sweep positioning analysises system and method.
Background technology
Power cable is the transmission and distribution for electric power, and with social development and progress, cable consumption is in entirely electricity
In power transmission line, shared ratio increasingly improves, and cable compares with overhead transmission line, has reliability height it is not easy to be subject to surrounding
Environment and the impact of pollution, between line, insulation distance is little, takes up an area few, noiseless electric wave a little, so using very extensive.Cable exists
During provided underground, do not take up an area face and space, not only safety but also reliability, were also not easy to give away one's position.
Because most of cable laying is in underground, with a large amount of uses of cable, when cable runs, due to extraneous and
Inherent the reason, all some faults can occur, belong to unpredictable phenomenon, after cable breaks down, the lookup of trouble point becomes
One great problem.Taken time and effort by manpower monitoring, so needing a kind of monitoring method to realize cable fault cable
Damage location positioning etc. provides the earlier stage processing method of data.
Content of the invention
The present invention is in order to solve the above problems it is proposed that a kind of positioned based on the cable frequency sweep that single port measures calibrating patterns
Analysis system and method, it is possible to achieve the early stage of the data such as cable failure location positioning, cable integrity data analysiss is processed.
To achieve these goals, the present invention adopts following scheme：
A kind of cable frequency sweep positioning analysises system measuring calibrating patterns based on single port, including：
Signal transmitting and receiving unit, including signal projector, signal coupler and signal receiver；Signal projector generates certain
The signal of frequency is sent to signal coupler, and transmission signal is acted on the tested cable of its end mounting by signal coupler, and
Receive the reflected signal from cable, described signal coupler is used for isolating transmission signal and reflected signal；Signal receiver divides
From the transmission signal of the reflected signal of signal coupler output and signal projector output, and the amplitude of the two Jie Shou not exported
Than with phase contrast as measurement data；
Single port calibrating patterns, the measurement data of receipt signal receptor output, list is applied to according to signal flow diagram theory
The expression formula of port calibrating patterns, analysis measurement data, position damage location, realize cable integrity data analysiss.
Also include signal filtering unit, be arranged between signal receiver and single port calibrating patterns, for measurement number
According to being filtered.
A kind of cable frequency sweep method for positioning analyzing being measured calibrating patterns based on single port, is comprised the following steps：
1) it is based on standard termination, measurement meets all calibration data of frequency needed for inverse Fourier transform, obtains signal stream
Figure theory is applied to the error entry value in the expression formula of single port calibrating patterns：
Wherein S11For measurement data, EXFor isolating error；EDFor directional error；EPFor positive frequencies tracking error；ERFor
Source mismatch error；EsFor reverse frequency tracking error；R is real reflection coefficient；
2) it is based on actual cable, measurement meets all real data of frequency needed for inverse Fourier transform；
3) it is applied to the expression formula of single port calibrating patterns according to real data and signal flow diagram theory, obtain the electricity of reality
Cable reflection coefficient, carries out inverse Fourier transform to actual cable reflection coefficient, you can positioning damage location, realizes cable complete
Property data analysiss.
Described step 1) comprise the following steps：
41) the end mounting short circuit load of signal coupler, reflection R=- 1 of short circuit load；
42) signal of signal projector generation certain frequency is sent to signal coupler；
43) single port calibrating patterns obtain the measurement data under this kind of frequency；
44) change signal projector sends the frequency of sinusoidal signal；Repeat step 43), number of repetition meets inverse Fourier
Frequency number of times required for conversion, measurement records measurement data after finishing.
45) changing load is open-circuited load, reflection R=1 of open-circuited load, repeat step 42) arrive step 44)；
46) changing load is cable matched load, reflection R=0 of cable matched load, repeat step 42) to step
Rapid 44)；
47) after three kinds of load measures finish, it is applied to the expression of single port calibrating patterns according to signal flow diagram theory
Formula, obtains EX+ED、EPERAnd EsValue；
Described step 2) comprise the following steps：
51) mount actual tested communication cable after signal coupler；
52) signal of signal projector generation certain frequency is sent to signal coupler；
53) single port calibrating patterns obtain the measurement data under this kind of frequency；
54) change signal projector sends the frequency of sinusoidal signal；Repeat step 53), number of repetition meets inverse Fourier
Number of times required for conversion, measurement records measured value after finishing.
Beneficial effects of the present invention：
(1) by single port measurement calibrating patterns are applied in the frequency sweep damage positioning system of cable, it is possible to achieve electricity
Cable integrity data is analyzed；
(2) early stage providing data for cable failure location positioning etc. is processed, and has ensured the safe and reliable operation of cable, from
And ensured stability and the safety of electric power system.
Brief description
Fig. 1 is connection diagram of the present invention；
Fig. 2 is signal transmitting and receiving cell schematics of the present invention；
Fig. 3 is applicating flow chart of the present invention.
Specific embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
A kind of cable frequency sweep positioning analysises system measuring calibrating patterns based on single port, including：
Signal transmitting and receiving unit, including signal projector, signal coupler and signal receiver；Signal projector generates certain
The signal of frequency is sent to signal coupler, and transmission signal is acted on the tested cable of its end mounting by signal coupler, and
Receive the reflected signal from cable, described signal coupler is used for isolating transmission signal and reflected signal；Signal receiver divides
From the transmission signal of the reflected signal of signal coupler output and signal projector output, and the amplitude of the two Jie Shou not exported
Than with phase contrast as measurement data；
Signal projector generates a series of signal of the frequencies meeting frequency needed for inverse Fourier transform.
Single port calibrating patterns, the measurement data of receipt signal receptor output, list is applied to according to signal flow diagram theory
The expression formula of port calibrating patterns, analysis measurement data, position damage location, realize cable integrity data analysiss.
Also include signal filtering unit, be arranged between signal receiver and single port calibrating patterns, for measurement number
According to being filtered.
Described single port calibrating patterns are a module being arranged on PC, for correcting to measurement data.
Described signal transmitting and receiving unit is used for realizing signal sending, the coupling of signal, and the reception of signal, and signal is sent out
Unit is sent to realize sine wave freuqency synthesis using AD9850, signal receives and adopts AD8302 high accuracy width phase detecting system, signal
Coupling carries out coupling processing using directional coupler.
A kind of cable frequency sweep method for positioning analyzing being measured calibrating patterns based on single port, is completed by following steps：
Step 1：Based on standard termination, measurement meets all calibration data of frequency needed for inverse Fourier transform, obtains letter
Number flow graph theory is applied to the error entry value in the expression formula of single port calibrating patterns；
Step 2：Based on actual cable, measurement meets all real data of frequency needed for inverse Fourier transform；
Step 3：It is applied to the expression formula of single port calibrating patterns according to real data and signal flow diagram theory, obtain reality
Cable reflection coefficient, inverse Fourier transform is carried out to actual cable reflection coefficient, you can positioning damage location, realize cable
Integrity data is analyzed.
Described step 1, comprises the following steps that：
1) single port calibrating patterns are connected with signal transmitting and receiving unit, the end mounting short circuit load of signal transmitting and receiving unit,
2) signal transmitting and receiving unit sets a kind of tranmitting frequency of sinusoidal signal；
3) measurement of single port calibrating patterns obtains based under this kind of frequency, the amplitude of reflected signal and phase place；
4) change signal transmitting and receiving unit sends the frequency of sinusoidal signal；
5) repeat step 3) arrive step 4), until the points required for obtaining, indication points, refer to PC end against in Fu herein
Points required for leaf transformation, ordinary circumstance we select at 1024 points or 512 points.
6) changing load is open-circuited load, repeat step 2) arrive step 5)；
7) changing load is cable matched load, repeat step 2) arrive step 5)；
8) after three kinds of load measures finish, single port calibrating patterns, single port calibrating patterns root are passed data to
Carry out correlation computations according to the fixing expression formula that signal flow diagram theory is applied to single port calibrating patterns, this expression formula is：
Wherein EXFor isolating error；
EDFor direction tropism error；
EPPositive frequencies tracking error；
ERSource mismatch error；
EsFor reverse frequency tracking error；
R is real reflection parameters.
S11For measured value.
After the deformation of this expression formula it is：
After above-mentioned three kinds of loads of mounting, corresponding measurement of reflection-factor value can be obtained, respectively：
M3=EX+ED
Wherein M1., M2, M3 respectively mount short circuit load, open-circuited load, the measured value under cable matched load.
According to the above results, the mathematic(al) representation that can calculate each error term is：
EX+ED=M3
After obtaining M1, M2, M3, you can obtain the value of ErEp, Ex+Ed and Es according to above-mentioned expression formula.
Described step 2, comprises the following steps that：
1) mount actual tested communication cable after signal transmitting and receiving unit；
2) signal transmitting and receiving unit sets a kind of tranmitting frequency of sinusoidal signal；
3) measure the amplitude of reflected signal, phase place, obtain the data under this dot frequency；
4) change signal transmitting and receiving unit sends the frequency of sinusoidal signal；
5) repeat step 3) arrive step 4), until the points required for obtaining；
6) single port calibrating patterns are passed data to.
Described step 3, based on step 2) obtained by data, according to above-mentioned formula, obtain real cable reflection coefficient
R, actual value R is carried out inverse Fourier transform, positions damage location, carries out cable shield integrity and Analysis of Topological Structure,
To realize cable integrity data analysiss, cable failure location positioning etc. provides the early stage of data to process.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not
Need to pay the various modifications that creative work can make or deformation still within protection scope of the present invention.
Claims (6)
1. a kind of cable frequency sweep positioning analysises system based on single port measurement calibrating patterns is it is characterised in that include：
Signal transmitting and receiving unit, including signal projector, signal coupler and signal receiver；Signal projector generates certain frequency
Signal be sent to signal coupler, transmission signal is acted on the tested cable of its end mounting by signal coupler, and receives
From the reflected signal of cable, described signal coupler is used for isolating transmission signal and reflected signal；Signal receiver connects respectively
Receive from signal coupler output reflected signal and signal projector output transmission signal, and export the Amplitude Ration of the two and
Phase contrast is as measurement data；
Single port calibrating patterns, the measurement data of receipt signal receptor output, single port is applied to according to signal flow diagram theory
The expression formula of calibrating patterns, analysis measurement data, position damage location, realize cable integrity data analysiss.
2. system according to claim 1 it is characterised in that：Signal projector generates and meets the required frequency of inverse Fourier transform
A series of signal of frequencies of point.
3. system according to claim 1 it is characterised in that：Also include signal filtering unit, be arranged at signal receiver
And single port calibrating patterns between, for being filtered to measurement data.
4. a kind of cable frequency sweep method for positioning analyzing measuring calibrating patterns based on single port according to claim 1, its
It is characterised by comprising the following steps：
1) it is based on standard termination, measurement meets all calibration data of frequency needed for inverse Fourier transform, obtain signal flow diagram reason
By the error entry value in the expression formula being applied to single port calibrating patterns：
2) it is based on actual cable, measurement meets all real data of frequency needed for inverse Fourier transform；
3) it is applied to the expression formula of single port calibrating patterns according to real data and signal flow diagram theory, the cable obtaining reality is anti-
Penetrate coefficient, inverse Fourier transform is carried out to actual cable reflection coefficient, you can positioning damage location, realize cable integrity number
According to analysis.
5. method according to claim 4 is it is characterised in that described step 1) comprise the following steps：
41) the end mounting short circuit load of signal coupler, reflection R=- 1 of short circuit load；
42) signal of signal projector generation certain frequency is sent to signal coupler；
43) single port calibrating patterns obtain the measurement data under this kind of frequency；
44) change signal projector sends the frequency of sinusoidal signal；Repeat step 43), number of repetition meets inverse Fourier transform
Required frequency number of times, measurement records measurement data after finishing.
45) changing load is open-circuited load, reflection R=1 of open-circuited load, repeat step 42) arrive step 44)；
46) changing load is cable matched load, reflection R=0 of cable matched load, repeat step 42) arrive step
44)；
47) after three kinds of load measures finish, it is applied to the expression formula of single port calibrating patterns according to signal flow diagram theory, obtains
To EX+ED、EPERAnd EsValue.
6. method according to claim 4 is it is characterised in that described step 2) comprise the following steps：
51) mount actual tested communication cable after signal coupler；
52) signal of signal projector generation certain frequency is sent to signal coupler；
53) single port calibrating patterns obtain the measurement data under this kind of frequency；
54) change signal projector sends the frequency of sinusoidal signal；Repeat step 53), number of repetition meets inverse Fourier transform
Required number of times, measurement records measured value after finishing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841838A (en) * | 2016-11-21 | 2017-06-13 | 山东康威通信技术股份有限公司 | The device and method of the cable shield status monitoring based on the measurement of frequency sweep reflection power |
| CN112782539A (en) * | 2020-12-28 | 2021-05-11 | 深圳供电局有限公司 | Cable insulation defect detection method and system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666109A (en) * | 2002-07-09 | 2005-09-07 | 朴珍培 | Time-frequency domain reflectometry apparatus and method |
| US20060005065A1 (en) * | 2002-04-17 | 2006-01-05 | Advantest Corporation | Network analyzer, network analyzing method, automatic corrector, correcting method, program, and recording medium |
| EP2360486A1 (en) * | 2010-02-24 | 2011-08-24 | Omicron electronics GmbH | Method for calibrating a partial discharge flow sensor |
| CN103592565A (en) * | 2012-08-16 | 2014-02-19 | 中兴通讯股份有限公司 | Position detection method and device for fault of cable |
| CN103983931A (en) * | 2014-05-06 | 2014-08-13 | 中国电子科技集团公司第十三研究所 | Method for determining uncertainty of S parameter measurement conducted through vector network analyzer |
| CN104297602A (en) * | 2014-10-23 | 2015-01-21 | 中国电子科技集团公司第四十一研究所 | Cable testing method based on simplified hardware circuit |
| CN204462307U (en) * | 2015-01-09 | 2015-07-08 | 山东康威通信技术股份有限公司 | Based on the cable-transmission line fault section location system of synchronized sampling |
| CN105301444A (en) * | 2015-10-14 | 2016-02-03 | 云南电网有限责任公司普洱供电局 | Single-port detection-based cable fault locating device |
| CN105388397A (en) * | 2015-12-02 | 2016-03-09 | 山东康威通信技术股份有限公司 | Fault positioning device and method for cable of branch structure |
| CN105510766A (en) * | 2015-11-06 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | Radio frequency cable fault positioning detection device and method |
-
2016
- 2016-08-19 CN CN201610695612.6A patent/CN106405323A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060005065A1 (en) * | 2002-04-17 | 2006-01-05 | Advantest Corporation | Network analyzer, network analyzing method, automatic corrector, correcting method, program, and recording medium |
| CN1666109A (en) * | 2002-07-09 | 2005-09-07 | 朴珍培 | Time-frequency domain reflectometry apparatus and method |
| EP2360486A1 (en) * | 2010-02-24 | 2011-08-24 | Omicron electronics GmbH | Method for calibrating a partial discharge flow sensor |
| CN103592565A (en) * | 2012-08-16 | 2014-02-19 | 中兴通讯股份有限公司 | Position detection method and device for fault of cable |
| CN103983931A (en) * | 2014-05-06 | 2014-08-13 | 中国电子科技集团公司第十三研究所 | Method for determining uncertainty of S parameter measurement conducted through vector network analyzer |
| CN104297602A (en) * | 2014-10-23 | 2015-01-21 | 中国电子科技集团公司第四十一研究所 | Cable testing method based on simplified hardware circuit |
| CN204462307U (en) * | 2015-01-09 | 2015-07-08 | 山东康威通信技术股份有限公司 | Based on the cable-transmission line fault section location system of synchronized sampling |
| CN105301444A (en) * | 2015-10-14 | 2016-02-03 | 云南电网有限责任公司普洱供电局 | Single-port detection-based cable fault locating device |
| CN105510766A (en) * | 2015-11-06 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | Radio frequency cable fault positioning detection device and method |
| CN105388397A (en) * | 2015-12-02 | 2016-03-09 | 山东康威通信技术股份有限公司 | Fault positioning device and method for cable of branch structure |
Non-Patent Citations (1)
| Title |
|---|
| 周浩波: "便携式单端口矢量网络分析仪射频通道电路的设计与实现", <中国优秀硕士学位论文全文数据库 工程科技II辑> * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841838A (en) * | 2016-11-21 | 2017-06-13 | 山东康威通信技术股份有限公司 | The device and method of the cable shield status monitoring based on the measurement of frequency sweep reflection power |
| CN106841838B (en) * | 2016-11-21 | 2019-05-17 | 山东康威通信技术股份有限公司 | Cable shield state monitoring apparatus and method based on the measurement of frequency sweep reflection power |
| CN112782539A (en) * | 2020-12-28 | 2021-05-11 | 深圳供电局有限公司 | Cable insulation defect detection method and system |
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