CN111007344A - Large circuit load test method for carbon fiber composite core wire - Google Patents
Large circuit load test method for carbon fiber composite core wire Download PDFInfo
- Publication number
- CN111007344A CN111007344A CN201911367522.4A CN201911367522A CN111007344A CN 111007344 A CN111007344 A CN 111007344A CN 201911367522 A CN201911367522 A CN 201911367522A CN 111007344 A CN111007344 A CN 111007344A
- Authority
- CN
- China
- Prior art keywords
- current
- wire
- test
- sag
- carbon fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention discloses a carbon fiber composite core wire large circuit load test method which comprises the steps of preparing a test loop, loading current, testing the maximum current, recording data in the test process in real time through online monitoring equipment, drawing a wire temperature-sag curve graph, a wire current-sag curve graph, point processing of sag abnormality and repeated test; by adopting the method, the current, the temperature and the sag variation trend of the carbon fiber composite core wire under the loading condition of alternating current and direct current can be compared, the current, the temperature, the sag and the external environment weather of the wire are monitored by utilizing the online monitoring equipment, the test factors are comprehensive, the test result is more accurate, a global mobile communication system communication network is adopted, the monitoring data is uploaded to a monitoring main station through a general wireless grouping mode, the data transmission and statistics are convenient and efficient, and the intelligent degree is high.
Description
Technical Field
The invention relates to a test method of a conductive wire, in particular to a large circuit load test method of a carbon fiber composite core wire.
Background
The carbon fiber composite core wire is a novel wire taking a carbon fiber composite material core as a reinforcing core. The high-temperature-resistant aluminum conductor cable has the remarkable characteristics of high temperature resistance, high capacity, low sag, low loss, light weight and the like, and can replace the traditional steel-cored aluminum conductor cable.
At present, the number of circuits of carbon fiber composite core wires in domestic operation is nearly thousands, and the voltage level is 35 kV-500 kV. But no systematic tracking studies have been conducted on the actual behavior of the wire in the line. The excellent performance of the transmission line is verified and summarized in the absence of an actual transmission line.
The traditional wire performance monitoring method is rough in mode, and does not take various slight factors which possibly influence the monitoring result into consideration, so that the accuracy of the test result is low, more monitoring factors are not convenient to collect, collect and transmit, and the collection difficulty is high.
Disclosure of Invention
Based on the defects in the prior art mentioned in the background art, the invention provides a large circuit load test method for a carbon fiber composite core wire.
The invention overcomes the technical problems by adopting the following technical scheme, and specifically comprises the following steps:
a large circuit load test method for a carbon fiber composite core lead comprises the following steps:
step one, preparing a test loop, namely taking a carbon fiber composite core wire and a steel-cored aluminum strand as the test loop; the span is set to be 200 meters, and a large-current generator is used as a power supply;
loading current, namely loading current into the test loop, gradually loading the current, recording the temperature and sag of the lead in real time, and keeping the loading current unchanged for 10 minutes when the temperature of the lead reaches integral multiple;
step three, carrying out maximum current test, determining the loaded maximum current according to the actual output current of the large-current generator, and recording the maximum temperature and sag of the wire at the moment;
after the test is finished, reducing the current to 0, and recording data in the test process in real time through online monitoring equipment;
step five, data processing, namely drawing a wire temperature-sag curve graph and a wire current-sag curve graph according to real-time data provided by the online monitoring equipment;
fifthly, processing points with abnormal sag, and manually processing data at the twisted position of the online monitoring equipment due to wind and other external actions;
and step six, repeating the test, testing the leads of different batches, simultaneously recording and processing test data, comparing the test data of the leads of different batches, and taking an average value.
As a further scheme of the invention: and in the second step, the ambient temperature, the wind speed, the sunshine, the initial temperature of the lead and the sag are measured and recorded before the current is loaded.
As a still further scheme of the invention: in the fourth step, the on-line monitoring equipment comprises a current testing device, a temperature testing device, a sag testing device and a microclimate device, wherein the current testing device is used for detecting the sag characteristic of the wire.
As a still further scheme of the invention: the device comprises a reference wire, a test wire, a temperature test device, a sag test device, a microclimate device and a wire tower, wherein the current test device is arranged on the reference wire, the temperature test device is arranged in two and is respectively arranged on the reference wire and the test wire, the sag test device is arranged in the middle of the reference wire and the test wire, and the microclimate device is arranged on the wire tower.
As a still further scheme of the invention: the sag testing device adopts a laser range finder to detect the verticality and the bending radian of the lead between two adjacent towers.
As a still further scheme of the invention: in the first step, the large current generator adopts a rated power supply current generator with variable types, 380V +/-5% of two-phase lines, 1800A power supply equipment comprises an alternating current load current 3KA, the allowable overload capacity is 1.1 times, the alternating current load voltage is 180V, and the voltage regulation range is 10% -105%; and the direct current load current is 3KA, the allowable overload capacity is 1.1 times, the direct current load voltage is 180V, and the voltage regulating range is 10-105%.
As a still further scheme of the invention: the on-line monitoring equipment adopts a global system for mobile communication network and uploads monitoring data to a monitoring main station in a general wireless grouping mode.
After adopting the structure, compared with the prior art, the invention has the following advantages: by adopting the method, the current, the temperature and the sag variation trend of the carbon fiber composite core wire under the loading condition of alternating current and direct current can be compared, the current, the temperature, the sag and the external environment weather of the wire are monitored by utilizing the online monitoring equipment, the test factors are comprehensive, the test result is more accurate, a global mobile communication system communication network is adopted, the monitoring data is uploaded to a monitoring main station through a general wireless grouping mode, the data transmission and statistics are convenient and efficient, and the intelligent degree is high.
Drawings
FIG. 1 is a flow chart of a large circuit load test method of a carbon fiber composite core wire.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1, in an embodiment of the present invention, a method for testing a large circuit load of a carbon fiber composite core wire includes the following steps:
step one, preparing a test loop, namely taking a carbon fiber composite core wire and a steel-cored aluminum strand as the test loop; the span is set to be 200 meters, and a large-current generator is used as a power supply;
wherein, in the carbon fiber composite core wire and the steel-cored aluminum strand, the technical parameters of the carbon fiber soft aluminum strand are as follows:
in the carbon fiber composite core wire and the steel-cored aluminum strand, the steel-cored aluminum strand has the following technical parameters:
loading current, namely loading current into the test loop, calculating a reference value of the current-carrying capacity of the wire loading calculation according to environmental conditions, gradually loading the current, recording the temperature and sag of the wire in real time, and keeping the loading current unchanged for 10 minutes when the temperature of the wire reaches integral multiple;
step three, carrying out maximum current test, determining the loaded maximum current according to the actual output current of the large-current generator, and recording the maximum temperature and sag of the wire at the moment;
after the test is finished, reducing the current to 0, and recording data in the test process in real time through online monitoring equipment;
step five, data processing, namely drawing a wire temperature-sag curve graph and a wire current-sag curve graph according to real-time data provided by the online monitoring equipment;
fifthly, point processing of sag abnormity, wherein in the testing process, the online monitoring equipment can be twisted due to wind and other external actions of the wire, so that the actual sag is influenced, and manual processing of data is needed;
and step six, repeating the test, testing the leads of different batches, simultaneously recording and processing test data, comparing the test data of the leads of different batches, and taking an average value.
In one embodiment of the invention, in the second step, the ambient temperature, the wind speed, the sunshine, the initial temperature of the wire and the sag are measured and recorded before the current is loaded.
In another embodiment of the present invention, in the fourth step, the on-line monitoring device includes a current testing device, a temperature testing device, a sag testing device and a microclimate device for detecting the sag characteristics of the wire.
In another embodiment of the invention, the current testing device is arranged on the comparison reference wire, the temperature testing devices are two and are respectively arranged on the reference wire and the test wire, the sag testing devices are two and are respectively arranged between the reference wire and the test wire, and the microclimate device is one and is arranged on the wire tower.
In another embodiment of the invention, the sag testing device adopts a laser range finder to detect the verticality and the bending radian of the conducting wire between two adjacent towers.
In another embodiment of the invention, in the first step, the high-current generator adopts a rated supply current generator with variable types, the two-phase two-wire power supply equipment is 380V ± 5%, the 1800A power supply equipment comprises an alternating load current 3KA, the allowable overload capacity is 1.1 times, the alternating load voltage is 180V, the voltage regulation range is 10% -105%, the minimum resolution is 2V, and the voltage increase and decrease time is less than 60 seconds; and the direct current load current is 3KA, the allowable overload capacity is 1.1 times, the direct current load voltage is 180V, the voltage regulating range is 10% -105%, the minimum resolution is 2V, and the voltage increasing and reducing time is less than 60 seconds.
In another embodiment of the present invention, because the online monitoring devices installed in the project are of various types and have wide location distribution, each online monitoring device employs a global system for mobile communications communication network and uploads monitoring data to the monitoring master station in a general wireless packet manner.
The current device, the temperature device, the microclimate device and the sag device of the test all work normally in the test process, and the normal operation of the test is ensured. Because the sag testing principle is laser ranging, the testing accuracy depends on the verticality of the testing device and the ground, the testing device is installed on the lead, the lead generates windage yaw under the action of wind, the testing device is further deviated, and the tested sag data are very large in discrete type. But the change trend and the maximum and minimum value of the sag can be seen, which is significant for the wire sag early warning.
From the comparison of the current, temperature and sag trend of two different types of wires, it can be seen that the current is increased, the temperature of the wire is generally increased, and the sag of the wire is increased, and vice versa. However, the current is too small, the influence on the temperature of the wire is not large, and further the influence on the sag of the wire is not large.
The wire temperature depends not only on the wire current but also on the ambient wind speed. The greater the wind speed, the less noticeable the temperature change due to the increased current.
The wire sag is mainly dependent on the wire temperature, but is also influenced by the wind speed, the larger the influence.
The current borne by the carbon fiber composite core wire is close to the designed rated current, but the temperature of the carbon fiber composite core wire does not reach the designed rated temperature, and the sag of the carbon fiber composite core wire meets the design requirement.
By adopting the method, the current, the temperature and the sag variation trend of the carbon fiber composite core wire under the loading condition of alternating current and direct current can be compared, the current, the temperature, the sag and the external environment weather of the wire are monitored by utilizing the online monitoring equipment, the test factors are comprehensive, the test result is more accurate, a global mobile communication system communication network is adopted, the monitoring data is uploaded to a monitoring main station through a general wireless grouping mode, the data transmission and statistics are convenient and efficient, and the intelligent degree is high.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. But all changes which come within the scope of the invention are intended to be embraced therein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Claims (7)
1. A large circuit load test method for a carbon fiber composite core wire is characterized by comprising the following steps:
step one, preparing a test loop, namely taking a carbon fiber composite core wire and a steel-cored aluminum strand as the test loop; the span is set to be 200 meters, and a large-current generator is used as a power supply;
loading current, namely loading current into the test loop, gradually loading the current, recording the temperature and sag of the lead in real time, and keeping the loading current unchanged for 10 minutes when the temperature of the lead reaches integral multiple;
step three, carrying out maximum current test, determining the loaded maximum current according to the actual output current of the large-current generator, and recording the maximum temperature and sag of the wire at the moment;
after the test is finished, reducing the current to 0, and recording data in the test process in real time through online monitoring equipment;
step five, data processing, namely drawing a wire temperature-sag curve graph and a wire current-sag curve graph according to real-time data provided by the online monitoring equipment;
fifthly, processing points with abnormal sag, and manually processing data at the twisted position of the online monitoring equipment due to wind and other external actions;
and step six, repeating the test, testing the leads of different batches, simultaneously recording and processing test data, comparing the test data of the leads of different batches, and taking an average value.
2. The carbon fiber composite core wire large circuit load test method as claimed in claim 1, wherein in the second step, the ambient temperature, the wind speed, the sunlight, the initial temperature of the wire and the sag are measured and recorded before the current is loaded.
3. The carbon fiber composite core wire large circuit load test method according to claim 1, wherein in the fourth step, the on-line monitoring equipment comprises a current test device, a temperature test device, a sag test device and a microclimate device for detecting the sag characteristics of the wire.
4. The carbon fiber composite core wire large circuit load test method as claimed in claim 3, wherein the current test device is installed on a comparison reference wire, the temperature test device is two and is respectively installed on the reference wire and the test wire, the sag test device is two and is respectively installed between the reference wire and the test wire, and the microclimate device is one and is installed on a wire tower.
5. The large circuit load test method of the carbon fiber composite core wire as claimed in claim 3, wherein the sag testing device adopts a laser range finder to detect the verticality and the bending radian of the wire between two adjacent towers.
6. The carbon fiber composite core wire large circuit load test method as claimed in claim 1, wherein in the first step, the large current generator adopts a rated power supply current generator with variable types, the two-phase two-wire is 380V +/-5%, 1800A power supply equipment comprises an alternating load current of 3KA, the allowable overload capacity is 1.1 times, the alternating load voltage is 180V, and the voltage regulation range is 10% -105%; and the direct current load current is 3KA, the allowable overload capacity is 1.1 times, the direct current load voltage is 180V, and the voltage regulating range is 10-105%.
7. The carbon fiber composite core wire large circuit load test method as claimed in claim 3, wherein the on-line monitoring device adopts a global system for mobile communications communication network and uploads monitoring data to a monitoring master station in a general wireless packet mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367522.4A CN111007344A (en) | 2019-12-26 | 2019-12-26 | Large circuit load test method for carbon fiber composite core wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367522.4A CN111007344A (en) | 2019-12-26 | 2019-12-26 | Large circuit load test method for carbon fiber composite core wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111007344A true CN111007344A (en) | 2020-04-14 |
Family
ID=70119000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911367522.4A Pending CN111007344A (en) | 2019-12-26 | 2019-12-26 | Large circuit load test method for carbon fiber composite core wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111007344A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556752A (en) * | 2020-12-01 | 2021-03-26 | 国网浙江省电力有限公司经济技术研究院 | In-service carbon fiber composite core wire mechanical property testing method, device and system |
| CN112630652A (en) * | 2020-11-30 | 2021-04-09 | 摩登汽车(盐城)有限公司 | Method for testing maximum current level of vehicle-mounted connector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858945A (en) * | 2010-04-29 | 2010-10-13 | 中国电力科学研究院 | Laboratory icing simulating test method of optical power ground wires (OPGWs) |
| CN103926484A (en) * | 2014-03-14 | 2014-07-16 | 广东电网公司电力科学研究院 | Electric transmission line dynamic capacity increasing method based on circuit sag real-time measurement |
| CN105486947A (en) * | 2015-11-28 | 2016-04-13 | 国网河南省电力公司郑州供电公司 | Line fault detection method based on carbon fiber conductor |
| CN106990310A (en) * | 2017-05-03 | 2017-07-28 | 中国南方电网有限责任公司电网技术研究中心 | Overhead power transmission conducting wire capacity characteristic monitoring system, method of testing and device |
-
2019
- 2019-12-26 CN CN201911367522.4A patent/CN111007344A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858945A (en) * | 2010-04-29 | 2010-10-13 | 中国电力科学研究院 | Laboratory icing simulating test method of optical power ground wires (OPGWs) |
| CN103926484A (en) * | 2014-03-14 | 2014-07-16 | 广东电网公司电力科学研究院 | Electric transmission line dynamic capacity increasing method based on circuit sag real-time measurement |
| CN105486947A (en) * | 2015-11-28 | 2016-04-13 | 国网河南省电力公司郑州供电公司 | Line fault detection method based on carbon fiber conductor |
| CN106990310A (en) * | 2017-05-03 | 2017-07-28 | 中国南方电网有限责任公司电网技术研究中心 | Overhead power transmission conducting wire capacity characteristic monitoring system, method of testing and device |
Non-Patent Citations (1)
| Title |
|---|
| 李斌 等: ""输电线路增容导线弧垂特性真型试验研究"", 《南方电网技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630652A (en) * | 2020-11-30 | 2021-04-09 | 摩登汽车(盐城)有限公司 | Method for testing maximum current level of vehicle-mounted connector |
| CN112556752A (en) * | 2020-12-01 | 2021-03-26 | 国网浙江省电力有限公司经济技术研究院 | In-service carbon fiber composite core wire mechanical property testing method, device and system |
| CN112556752B (en) * | 2020-12-01 | 2022-07-12 | 国网浙江省电力有限公司经济技术研究院 | In-service carbon fiber composite core wire mechanical property testing method, device and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105353256B (en) | A kind of power transmission and transformation equipment state method for detecting abnormality | |
| Douglass et al. | Real-time overhead transmission-line monitoring for dynamic rating | |
| Yang et al. | Power line sensornet-a new concept for power grid monitoring | |
| CN105406476B (en) | Stability of power system quick judgment method based on historical data | |
| CN111007344A (en) | Large circuit load test method for carbon fiber composite core wire | |
| CN108701994B (en) | System and method for dynamically determining maximum capacity for current transmission | |
| CN106877404A (en) | One kind hair transmission of electricity joint dynamic compatibilization method and system | |
| CN112924817A (en) | Power distribution network fault accurate positioning method based on deep neural network | |
| US11159045B2 (en) | Facility for monitoring a portion of a high-voltage electrical power transmission network | |
| CN107069718A (en) | The low-voltage distribution network line loss calculation method influenceed based on three-phase imbalance on line loss | |
| CN104052053B (en) | Based on the power distribution network double line terminal section impedance analysis method of Linear Regression Model in One Unknown | |
| CN111030098A (en) | Method for dynamically improving heat stability limit of power transmission section based on multivariate parameter constraint | |
| CN106990310B (en) | Overhead transmission conductor capacity characteristic monitoring system, testing method and device | |
| CN111244951A (en) | Sensitivity analysis-based multi-section online stability quota calculation method and system | |
| McLaughlin et al. | Application of dynamic line rating to defer transmission network reinforcement due to wind generation | |
| Alvarez et al. | Dynamic line rating—Technologies and challenges of PMU on overhead lines: A survey | |
| CN110108983B (en) | Intelligent cable state online measurement and control management method | |
| CN108921348A (en) | A kind of transmission line of electricity maximum carrying capacity probability density distribution appraisal procedure based on weather prognosis | |
| CN107329022A (en) | A kind of transmission line of electricity loadability analysis method | |
| CN108683182B (en) | Regional power distribution network vulnerability assessment method | |
| CN111953025A (en) | Method and system for determining distributed photovoltaic absorption capacity of power distribution network | |
| CN115545479A (en) | Method and device for determining important nodes or important lines of power distribution network | |
| CN109711687B (en) | Insulator state fuzzy evaluation method based on improved entropy method | |
| CN114696318A (en) | Comprehensive identification method for key line of power grid based on deviation maximization idea | |
| CN114371364A (en) | Short-circuit fault judgment method based on load end positive sequence voltage amplitude variation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200414 |
|
| RJ01 | Rejection of invention patent application after publication |