CN1976245A - Capacity coupler used for intermediate voltage power line carrier communication - Google Patents
Capacity coupler used for intermediate voltage power line carrier communication Download PDFInfo
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- CN1976245A CN1976245A CN 200610155084 CN200610155084A CN1976245A CN 1976245 A CN1976245 A CN 1976245A CN 200610155084 CN200610155084 CN 200610155084 CN 200610155084 A CN200610155084 A CN 200610155084A CN 1976245 A CN1976245 A CN 1976245A
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- circuit
- carrier communication
- power line
- line carrier
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
A capacity coupler used on carrier communication of medium voltage power line is prepared as setting the first circuit between power line and the second circuit, arranging high voltage capacitor on the first circuit for using said capacitor to couple signal onto power line and series-connecting isolation-coupled transformer to high voltage capacitor.
Description
Technical field
The present invention relates to the coupler field, mainly is a kind of capacity coupler that is used for the medium voltage electricity line carrier communication.
Background technology
Medium voltage power line communication is the decay of high-frequency signal and the solution of dielectric strength with the problem of data coupler.Coupler is the coupling data signal between the communicator of power line and modulator-demodulator.For this capacitive couplings device can be adopted by medium voltage power line, this coupler just must be under some conditions safe operation and the carrier signal that satisfies 1-40MHZ very low decay is arranged, these conditions comprise and exchange proof voltage, partial discharge, lightning impulse and console switch instantaneous peak value voltage.This data coupler can be capacitive coupler or inductive coupler.
Summary of the invention
The present invention will solve above-mentioned existing shortcoming, and a kind of capacity coupler that is used for the medium voltage electricity line carrier communication is provided.
The present invention solves the technical scheme that its technical problem adopts: this capacity coupler that is used for the medium voltage electricity line carrier communication, this coupler comprises first circuit, first circuit is connected between power line and the second circuit, and wherein first circuit has the high-voltage capacitor that is used to couple a signal to power line; And the isolation coupling transformer of connecting with high-voltage capacitor.
Second circuit of the present invention is meant earthed circuit; Also can be meant another phase line of power line, at this moment this capacity coupler comprises a circuit, and this circuit has high-voltage capacitor 1 He that 1. is used to couple a signal to medium voltage power line phase line 1; 2. be used to couple a signal to the high-voltage capacitor 2 of medium voltage power line phase line 2; 3. with the isolation coupling transformer of high-voltage capacitor 1 and high-voltage capacitor 2 polyphones; 4. the other end of high-voltage capacitor 1 and high-voltage capacitor 2 is connected with ground wire by the safe inductor that intercepts the 1-40MHZ carrier signal respectively.
Power line of the present invention also can be the shaft core line cable of radio frequency cable, and second circuit is the screen of radio frequency cable, constitutes the layout that is used in the condenser type signal coupler that centers on coaxial radio frequency cable in the TVCable carrier communication system.
First circuit of the present invention also comprises the gas discharge protective circuit that is used for anti-lightning impulse of connecting with high-voltage capacitor, as gas discharge tube or gap etc.
The radio-frequency (RF) output end of isolation coupling transformer of the present invention is parallel with the semiconductor discharge protection circuit that is used for anti-lightning impulse, as semiconductor discharge tube etc.; Be parallel with the resonant circuit that is used to reduce the high-frequency signal decay between elementary, secondary, the primary and secondary of isolation coupling transformer.
The effect that the present invention is useful is: capacity coupler is the device that is used to couple a signal to power line.The present invention has realized pressing the low decay of 1-40MHz signal of communication under the dielectric strength in 10KV, to satisfy the needs of medium voltage electricity line carrier communication.Gas discharge tube or gap are arranged in the isolation coupling transformer, semiconductor discharge tube is arranged in isolation coupling transformer secondary output coil, and effectively protection is owing to the current surge that lightning, switch transient process etc. cause can induce very big voltage in the isolation coupling transformer.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention 1;
Fig. 2 is the circuit theory diagrams of the embodiment of the invention 2;
Fig. 3 is the circuit theory diagrams of the embodiment of the invention 3;
Fig. 4 is the circuit theory diagrams of the embodiment of the invention 4;
Embodiment
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Embodiment 1: as shown in Figure 1, this coupler comprises first circuit, and first circuit is connected between medium voltage power line 200 and the earthed circuit, and wherein first circuit has the high-voltage capacitor 201 that is used to couple a signal to power line; And the isolation coupling transformer 202 of connecting with high-voltage capacitor, the elementary and high-voltage capacitor 201 of isolation coupling transformer 202 is connected, and its secondary ab outputs to the modulator-demodulator of communication device.
Embodiment 2: be coupler ground coupling schematic diagram mutually as shown in Figure 2; Be used for carrier signal is coupled to capacity coupler between medium voltage power line phase line and the ground wire; high-voltage capacitor 201 is connected with phase line 200 by a high pressure fuse 205; elementary and the high-voltage capacitor 201 of isolation coupling transformer 202 is connected; its secondary ab outputs to the modulator-demodulator of communication device; and b point ground connection; gas discharge tube 203 is connected in parallel on the elementary of isolation coupling transformer 202; semiconductor discharge tube 204 is connected in parallel on the secondary of isolation coupling transformer 202, forms anti-lightning impulse protective circuit.
In the present embodiment; capacity coupler comprises high-voltage capacitor and the isolation coupling transformer of contacting with this capacitor; and for being protected from the discharge circuit that lightning impulse is connected in parallel on isolation coupling transformer input, output, signal of communication forms the loop between phase line that links to each other with high-voltage capacitor and ground wire.
Embodiment 3: be the coupler phase phase mode schematic diagram that is coupled as shown in Figure 3; Be a kind of being used for carrier signal to be coupled to capacity coupler between medium voltage power line phase line and the phase line, high-voltage capacitor 201 is connected with phase line 200 by a high pressure fuse 205, another high-voltage capacitor 207 is connected with another phase line 213 by another high pressure fuse 206, series connection isolation coupling transformer 202 between high-voltage capacitor 201 and the capacitor 207, its secondary ab outputs to the modulator-demodulator of communication device, and semiconductor discharge tube 210 is connected in parallel on the output of isolation coupling transformer 202.High-voltage capacitor 201 is by inductance 208 ground connection, with the low-voltage end of clamping down on electric capacity 201 than electronegative potential, inductance 208 stops high frequency (1-40MHz) signal of communication, and power frequency is then formed path, and gas discharge tube 209 is connected in parallel on inductance 208 two ends and plays anti-lightning impulse protective effect; In like manner; high-voltage capacitance 207 is by inductance 211 ground connection, and than electronegative potential, inductance 211 stops high frequency (1-40MHz) signal of communication with the low-voltage end of clamping down on electric capacity 207; power frequency is then formed path, and gas discharge tube 212 is connected in parallel on inductance 211 two ends and plays anti-lightning impulse protective effect.
In the present embodiment, for anti-interference, reduce the decay of signal of communication, adopt the mode that is coupled mutually, by two independently high-voltage capacitor connect with different phase line respectively, middle serial connection isolation coupling transformer, communication signal forms the loop between two phase lines, reduced owing to adopt the too much interference that coupled modes produced mutually.
Embodiment 4: be the coupler schematic diagram that has increased the resonant circuit that is used to reduce the high-frequency signal decay as shown in Figure 4, as medium voltage electricity line carrier communication signal frequency 1-40MHz, between high band 20-40MHz, carrier signal has on transmission line than high attenuation, adopt the capacitor 213 of appearance value between 10-100PF among Fig. 4, can in the frequency range of 20-40MHz, cause resonance, the signal attenuation of compensation high band.
In the present embodiment, in order further to reduce the transmission attenuation of high-frequency signal (20-40MHz) on power line, the capacitor of employing appropriate appearance value in parallel between isolation coupling primary, secondary, primary and secondary to be formed on the resonance of high band, improves signal strength signal intensity.
The present invention also can couple a signal to the coaxial radio frequency cable of non-electricity cable, and phase line 200 can be replaced by the shaft core line cable of radio frequency cable, and ground wire can be replaced by the screen of radio frequency cable.
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of requirement of the present invention.
Claims (7)
1, a kind of capacity coupler that is used for the medium voltage electricity line carrier communication, it is characterized in that: this coupler comprises first circuit, and first circuit is connected between power line and the second circuit, and wherein first circuit has
(A) be used to couple a signal to the high-voltage capacitor of power line; And with
(B) the isolation coupling transformer of high-voltage capacitor series connection.
2, the capacity coupler that is used for the medium voltage electricity line carrier communication according to claim 1, it is characterized in that: described second circuit is meant earthed circuit.
3, the capacity coupler that is used for the medium voltage electricity line carrier communication according to claim 1 is characterized in that: described second circuit is meant another phase line of power line.
4, the capacity coupler that is used for the medium voltage electricity line carrier communication according to claim 1 is characterized in that: described first circuit also comprises the gas discharge protective circuit that is used for anti-lightning impulse of connecting with high-voltage capacitor.
5, the capacity coupler that is used for the medium voltage electricity line carrier communication according to claim 1 is characterized in that: the radio-frequency (RF) output end of described isolation coupling transformer is parallel with the semiconductor discharge protection circuit that is used for anti-lightning impulse.
6, be used for the capacity coupler of medium voltage electricity line carrier communication according to claim 1 or 5, it is characterized in that: be parallel with the resonant circuit that is used to reduce the high-frequency signal decay between elementary, secondary, the primary and secondary of described isolation coupling transformer.
7, the capacity coupler that is used for the medium voltage electricity line carrier communication according to claim 1 is characterized in that: described power line is the shaft core line cable of radio frequency cable, and second circuit is the screen of radio frequency cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610155084 CN1976245A (en) | 2006-12-07 | 2006-12-07 | Capacity coupler used for intermediate voltage power line carrier communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610155084 CN1976245A (en) | 2006-12-07 | 2006-12-07 | Capacity coupler used for intermediate voltage power line carrier communication |
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| Publication Number | Publication Date |
|---|---|
| CN1976245A true CN1976245A (en) | 2007-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200610155084 Pending CN1976245A (en) | 2006-12-07 | 2006-12-07 | Capacity coupler used for intermediate voltage power line carrier communication |
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| CN (1) | CN1976245A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447494A (en) * | 2011-12-31 | 2012-05-09 | 上海贝岭股份有限公司 | Broadband coupling circuit for multicarrier communication |
| CN105551227A (en) * | 2015-12-10 | 2016-05-04 | 国网四川省电力公司电力科学研究院 | Waveform signal source directly injected into power line |
| CN105610468A (en) * | 2016-01-11 | 2016-05-25 | 国家电网公司 | Integrated capacitive coupler for narrowband carrier communication of medium voltage power line |
| CN105790797A (en) * | 2016-01-29 | 2016-07-20 | 青岛鼎信通讯股份有限公司 | Integrated capacitive coupler for medium voltage power carrier communication |
| CN106059626A (en) * | 2016-06-21 | 2016-10-26 | 国网福建省电力有限公司 | Networking method for achieving medium-voltage communication by using arrester |
| CN110572190A (en) * | 2018-06-06 | 2019-12-13 | 青岛鼎信通讯股份有限公司 | Bridging device for medium-voltage carrier communication |
| CN110830084A (en) * | 2019-12-24 | 2020-02-21 | 上海虑信电力科技有限公司 | Phase coupling driving circuit of power line carrier communication system |
-
2006
- 2006-12-07 CN CN 200610155084 patent/CN1976245A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447494A (en) * | 2011-12-31 | 2012-05-09 | 上海贝岭股份有限公司 | Broadband coupling circuit for multicarrier communication |
| CN105551227A (en) * | 2015-12-10 | 2016-05-04 | 国网四川省电力公司电力科学研究院 | Waveform signal source directly injected into power line |
| CN105610468A (en) * | 2016-01-11 | 2016-05-25 | 国家电网公司 | Integrated capacitive coupler for narrowband carrier communication of medium voltage power line |
| CN105790797A (en) * | 2016-01-29 | 2016-07-20 | 青岛鼎信通讯股份有限公司 | Integrated capacitive coupler for medium voltage power carrier communication |
| CN106059626A (en) * | 2016-06-21 | 2016-10-26 | 国网福建省电力有限公司 | Networking method for achieving medium-voltage communication by using arrester |
| CN106059626B (en) * | 2016-06-21 | 2019-08-13 | 国网福建省电力有限公司 | It is a kind of using arrester realize in press the network-building method of communication |
| CN110572190A (en) * | 2018-06-06 | 2019-12-13 | 青岛鼎信通讯股份有限公司 | Bridging device for medium-voltage carrier communication |
| CN110830084A (en) * | 2019-12-24 | 2020-02-21 | 上海虑信电力科技有限公司 | Phase coupling driving circuit of power line carrier communication system |
| CN110830084B (en) * | 2019-12-24 | 2021-06-22 | 上海虑信电力科技有限公司 | Phase coupling driving circuit of power line carrier communication system |
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Open date: 20070606 |