CN111610370A - 10kV line impedance detection device - Google Patents
10kV line impedance detection device Download PDFInfo
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- CN111610370A CN111610370A CN201910438691.6A CN201910438691A CN111610370A CN 111610370 A CN111610370 A CN 111610370A CN 201910438691 A CN201910438691 A CN 201910438691A CN 111610370 A CN111610370 A CN 111610370A
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- voltage
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- impedance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
A medium voltage line impedance detection device comprises two devices, wherein a directional coupler, a voltage sampler, a current detector, a signal source, a receiving indicator and a display controller are arranged in the device (1), and the device is characterized in that: the device will realize the transmission, reception and display of signals. The device (2) is a high-voltage coupler, and is characterized in that: and carrying out 10kV medium-voltage line feeding on the signal source signal by virtue of a high-voltage coupling capacitor and a feeding network transformer. The device (1) is used as a data receiving and transmitting processor, has a visual interface, is powered by a battery of the whole equipment, is convenient to carry, and can improve the field working efficiency.
Description
Technical Field
The invention relates to a 10kV line impedance detection device.
Background
The medium-voltage line is not a good signal transmission path, and is influenced by the line length in actual use, and meanwhile, the signal-to-noise ratio of the medium-voltage line has severe difference along with the change of switching load.
Currently, the medium-voltage line channel monitoring mode is as follows: and respectively building systems at two ends of a circuit AB, injecting a carrier signal from the end A, receiving the transmitted carrier signal at the end B, knowing the transmission power (dB) of the end A, calculating power loss by comparing the signal strength (dB) received by the end B, and analyzing the impedance of the current channel.
The above method has the following disadvantages: the device is complex to build, needs to additionally increase communication means for power information synchronization, and has low efficiency and high cost.
Disclosure of Invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide a device for conveniently detecting the impedance of a medium voltage line. The device does not need bidirectional installation, has synchronous data, and has the advantages of high efficiency, low cost and simple and convenient construction.
The above object of the present invention is achieved by the following technical solutions:
the technical scheme adopted by the invention for solving the technical problems is as follows: medium voltage impedance detection device (1), high-voltage capacitive coupler (2).
The medium-voltage impedance detection device (1) provides signal transmission, current detection, voltage sampling, signal receiving and display control.
The medium-voltage impedance detection device is composed of a signal source, a current detector, a voltage sampler, a directional coupler and a display controller, wherein the signal source is used for channel frequency scanning, the current detector is used for current detection of a signal source power feed network and current detection of received signals, the voltage sampler is used for collecting voltage values at the front end of the capacitive coupler, and the directional coupler is used for receiving reflected signals.
The high-voltage coupler provides signal coupling, strong and weak electric isolation and impedance conversion of a medium-voltage line.
When the invention is used, a signal source outputs a power signal with a certain frequency, and the output current is detected and recorded through the current; the transmitted power is fed to a 10kV medium-voltage line through a directional coupler and a high-voltage coupler, due to the fact that the impedance of the 10kV medium-voltage line is unknown, part of signals are reflected in an echo mode, a medium-voltage impedance detection device (1) receives the signals through the directional coupler, current detection is conducted on the received signals, voltage sampling is conducted, and the reflection coefficient and the impedance can be calculated.
The impedance coupling ratio of the high-voltage coupler used by the invention is 1:1, and the impedance on a 10kV medium-voltage line can be reversely deduced through impedance transformation.
The invention is provided with a display control unit, and can be operated and observed intuitively.
Drawings
The drawings that are required to be used in the embodiments will be further described below.
FIG. 1 is an electrical block diagram of an embodiment of the present invention.
Detailed Description
Referring to the attached figure 1, the invention relates to a portable impedance measuring device which comprises two parts (1) and (2), wherein the device 1 comprises a display control unit, a current detector, a voltage sampler, a signal source, a receiving indicator and a directional coupler. The method is characterized in that: the display control unit is used for realizing overall control and display in the device 1, the current detection, voltage sampling and receiving indicator is used for collecting sending and receiving signals, and the directional coupler is used for realizing the signal feed network of the device 1. The device (2) is a high-voltage coupler and is internally provided with an impedance conversion circuit, the impedance ratio is nearly 1:1 in the embodiment, and the device (2) realizes the isolation of high-voltage and low-voltage voltages.
In the embodiment of the invention, a signal source sends a signal with a specified frequency, the signal is directly transmitted through a directional coupler and is coupled to a medium-voltage line through a high-voltage coupler, signal energy fed back by the directional coupler is collected at the sending moment, the feedback quantity of the energy can calculate the feedback rate through a formula, and the formula is as follows:
the impedance measurement can be used for calculating the current of the inlet end of the device (2) through current detection and kCL, and the voltage of the inlet end of the device (2) is collected according to a voltage sampler.
The impedance of the input end of the device (2) can be calculated according to the voltage and current sampling values.
The impedance ratio of two ends of the coupling capacitor in the known device (2) is 1:1, and the impedance characteristic on a 10kV medium-voltage line can be obtained through impedance transformation.
The display control unit can adjust frequency and draw graphs.
If the assumption is not true, after the signal source transmits a signal and the receiving indicator receives the signal, failure prompt is given, and the failure prompt is the detection values of each detector, the voltage sampling value and the current detection value.
As mentioned above, assuming that a certain item is marked with a red mark 0, it indicates that the data is abnormal and needs to be tested after being checked.
If the above assumption is not true, the present invention will suggest that the impedance values at this node, including the test frequency, operate in sequence to perform link testing on the n-1, n-2, … nodes.
The invention uses battery to supply power, and can provide a portable test mode.
Claims (2)
1. A medium-voltage line impedance detection device comprises two devices (1) and (2), wherein a directional coupler, a voltage sampler, a current detector, a signal source and a receiving indicator are arranged in the device (1). The method is characterized in that: the device (1) realizes the receiving and sending of test signals, realizes the network feeding of a 10kV medium-voltage carrier line through the device (2), and provides impedance conversion. A display controller in the device (1) realizes frequency control, data sampling, operation and fault prompting, and displays the calculated result on a display.
2. A medium voltage line impedance sensing apparatus according to claim 1, wherein: the device (1) provides an energy transmission sampling function for the device (2), and the device (2) performs impedance transformation and also has a signal coupling transmission function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438691.6A CN111610370A (en) | 2019-05-23 | 2019-05-23 | 10kV line impedance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438691.6A CN111610370A (en) | 2019-05-23 | 2019-05-23 | 10kV line impedance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111610370A true CN111610370A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910438691.6A Withdrawn CN111610370A (en) | 2019-05-23 | 2019-05-23 | 10kV line impedance detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111610370A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034117A (en) * | 2007-04-02 | 2007-09-12 | 武汉大学 | Power transmission line power frequency parameters measuring method and device |
| CN102751952A (en) * | 2012-07-20 | 2012-10-24 | 钜泉光电科技(上海)股份有限公司 | Impedance matching circuit and impedance matching method of power amplifier |
| CN103063926A (en) * | 2012-12-19 | 2013-04-24 | 中国电力科学研究院 | Test method and test device for low-voltage power line narrowband carrier access impedance |
| CN203054091U (en) * | 2012-11-29 | 2013-07-10 | 中国电力科学研究院 | Narrow-band carrier access impedance testing device for low-voltage power lines |
| CN203365552U (en) * | 2013-08-13 | 2013-12-25 | 国家电网公司 | Power line impedance test circuit structure |
| CN104184494A (en) * | 2014-08-29 | 2014-12-03 | 国家电网公司 | Testing system and method for broadband power line carrier channel access resistance |
| CN107576879A (en) * | 2017-07-27 | 2018-01-12 | 山东康威通信技术股份有限公司 | Sweep measurement device and the method for estimating cable attribute |
| CN108169589A (en) * | 2017-12-08 | 2018-06-15 | 囯网河北省电力有限公司电力科学研究院 | Power line communication environment measuring device and test method |
| CN108226647A (en) * | 2018-04-13 | 2018-06-29 | 南方电网科学研究院有限责任公司 | A kind of measuring device to power line access point impedance |
| CN209102805U (en) * | 2018-06-06 | 2019-07-12 | 青岛鼎信通讯股份有限公司 | A kind of midium voltage cable shielded layer narrowband carrier access impedance test system |
-
2019
- 2019-05-23 CN CN201910438691.6A patent/CN111610370A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034117A (en) * | 2007-04-02 | 2007-09-12 | 武汉大学 | Power transmission line power frequency parameters measuring method and device |
| CN102751952A (en) * | 2012-07-20 | 2012-10-24 | 钜泉光电科技(上海)股份有限公司 | Impedance matching circuit and impedance matching method of power amplifier |
| CN203054091U (en) * | 2012-11-29 | 2013-07-10 | 中国电力科学研究院 | Narrow-band carrier access impedance testing device for low-voltage power lines |
| CN103063926A (en) * | 2012-12-19 | 2013-04-24 | 中国电力科学研究院 | Test method and test device for low-voltage power line narrowband carrier access impedance |
| CN203365552U (en) * | 2013-08-13 | 2013-12-25 | 国家电网公司 | Power line impedance test circuit structure |
| CN104184494A (en) * | 2014-08-29 | 2014-12-03 | 国家电网公司 | Testing system and method for broadband power line carrier channel access resistance |
| CN107576879A (en) * | 2017-07-27 | 2018-01-12 | 山东康威通信技术股份有限公司 | Sweep measurement device and the method for estimating cable attribute |
| CN108169589A (en) * | 2017-12-08 | 2018-06-15 | 囯网河北省电力有限公司电力科学研究院 | Power line communication environment measuring device and test method |
| CN108226647A (en) * | 2018-04-13 | 2018-06-29 | 南方电网科学研究院有限责任公司 | A kind of measuring device to power line access point impedance |
| CN209102805U (en) * | 2018-06-06 | 2019-07-12 | 青岛鼎信通讯股份有限公司 | A kind of midium voltage cable shielded layer narrowband carrier access impedance test system |
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Application publication date: 20200901 |