CN202634425U - One-to-many half-duplex responsive cable power line carrier relay communication system - Google Patents
One-to-many half-duplex responsive cable power line carrier relay communication system Download PDFInfo
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- CN202634425U CN202634425U CN 201220252726 CN201220252726U CN202634425U CN 202634425 U CN202634425 U CN 202634425U CN 201220252726 CN201220252726 CN 201220252726 CN 201220252726 U CN201220252726 U CN 201220252726U CN 202634425 U CN202634425 U CN 202634425U
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Abstract
The utility model discloses a one-to-many half-duplex responsive cable power line carrier relay communication system. The communication system is characterized by comprising carrier data transmit-receive terminals (1), clamping-type narrowband inductance coupling adapters (2) and buried cables (4), wherein the buried cables are sequentially connected with one another in a segmented manner; shielding layers on two sides of each segmented cable (4) are grounded; one clamping-type narrowband inductance coupling adapters (2) is respectively arranged on two sides of each grounded point (2); a first clamping-type narrowband inductance coupling adapter (2) of the first segmented cable (4) is connected to one carrier data transmit-receive terminal (1); and every two adjacent clamping-type narrowband inductance coupling adapters (2) of two adjacent segment buried cables (4) are connected with each other. The one-to-many half-duplex responsive cable power line carrier relay communication system can better take the communication speed and data transfer accuracy into consideration, so that the size, the weight, the installation, the use and the manufacturing cost of a power line carrier signal coupling device can be comprehensively matched with installation conditions, investment capacities and operating requirements of a 10kV power grid.
Description
Technical field:
The utility model relates to the one-to-many half-duplex and replys formula ground cable power line carrier relay communications system, belongs to power line carrier (PLC) communications field.
Background technology:
The world is multinational to be devoted to the intelligent grid construction, and the construction key technology of intelligent grid is data communication, and up to the present, data communication is still the bottleneck that restriction mesolow intelligent grid is built.The GPRS pattern that current medium voltage network is popular is a public network, and it only supports AMR (remote meter reading), does not support the intelligent grid construction, presses the exclusive data communications platform of intelligent grid demand to become the task of top priority during therefore research and development can be satisfied.In fact the mesolow intelligent grid build except GPRS, also have optical cable, wireless, PLC (power line carrier) pattern is available.Because the optical cable construction receives the restriction of condition and fund, wirelessly receive the restriction of frequency spectrum resource to make the popularization and application of this dual mode all receive serious restriction, having PLC only is the advantageous best mode of electric power system.There are greatest differences in the structure and the carrier characteristics of medium voltage network and high-voltage fence, and traditional power line carrier equipment has lost using value, and research and development are significant with the novel electric power line carrier number biography system that middle pressure intelligent grid matees comprehensively again.Have the history in more than 20 year both at home and abroad about the research of mesolow electrical network plc communication platform; But because medium voltage network is an one-to-many system; The T that exists at random on the circuit connects, intersects, turns round, overhead wire with cable interface etc. all had a strong impact on the carrier wave normal transmission, so the research of all traditional approachs does not all have achievement.
The utility model content:
The purpose of the utility model is to overcome the deficiency of above-mentioned prior art and the present situation to medium voltage network PLC technology is provided, and its technical performance, equipment manufacturing cost, index and the middle ground cable electrical network one-to-many half-duplex of the coupling cable power line carrier relay communications system comprehensively of pressing such as installs and uses with replying formula.
The purpose of the utility model can reach through following measure: formula ground cable power line carrier relay communications system is replied in the one-to-many half-duplex; It is characterized in that it comprises the carrier data transceiver terminal; Plug-in arrowband inductance coupling high adapter, cable; Ground cable segmentation connects successively, the equal ground connection of screen at cable two ends, every section ground, and the both sides of each earth point respectively are provided with a plug-in arrowband inductance coupling high adapter; First section ground first plug-in arrowband inductance coupling high adapter on the cable connects carrier data transceiver terminal, and two adjacent plug-in arrowband inductance coupling high adapters of adjacent segment ground cable connect.
In order further to realize the purpose of the utility model, it also is provided with the frequency conversion relaying, and every grade of frequency conversion relaying is made up of two interfaces that two adjacent plug-in arrowband inductance coupling high adapters of adjacent segment ground cable connect two-way frequency conversion link terminal respectively.
In order further to realize the purpose of the utility model, be provided with forward relay behind described per three grades of frequency conversion relayings, forward relay is made up of two adjacent plug-in arrowband carrier data transceiver terminals of inductance coupling high adapters connection of adjacent segment ground cable.
In order further to realize the purpose of the utility model; The two-way frequency conversion link terminal of described carrier wave comprises single-chip microcomputer; Single-chip microcomputer connects first analog switch, second analog switch, the 3rd analog switch, the 4th analog switch, the 5th analog switch, the 6th analog switch, frequency mixer, LM phase-locked loop, amplification shaping device, power amplifier, RS485 interface respectively; First analog switch connects and connects first filter, second analog switch, power amplifier, plug-in arrowband inductance coupling high adapter respectively, and first filter connects the 3rd filter, amplitude limiter, and the 3rd filter connects second analog switch; Amplitude limiter connects frequency mixer; Frequency mixer connects the 3rd analog switch, the 4th analog switch respectively, and the 3rd analog switch connects second filter, and second filter connects LM567 phase-locked loop, the 4th filter respectively; The 4th filter connects the 4th analog switch; The LM567 phase-locked loop connects the 5th analog switch, the 6th analog switch, amplification shaping device, and the 6th analog switch connects power amplifier, and power amplifier connects second analog switch, plug-in arrowband inductance coupling high adapter respectively; First filter, second filter are identical, and the 3rd filter, the 4th filter are identical.
In order further to realize the purpose of the utility model; Described plug-in arrowband inductance coupling high adapter is formed by being connected to ground outer inductive coupler L, capacitor C and the impedance adapter SP of cable screen; The ferrite semicircle magnet ring that inductive coupler L adopts two bores and ground cable external diameter to mate; Wherein half coils and forms the plug-in inductive coupler, and impedance adapter SP adopts the ferrite magnetic tank coiling to form.
In order further to realize the purpose of the utility model; Described carrier data transceiver terminal comprises receiving filter, power amplifier; Receiving filter connects demodulator, and demodulator connects monolithic computer, and monolithic computer connects the RS interface; The RS485 interface connects the RS485 bus, and receiving filter and power amplifier all are connected with plug-in arrowband inductance coupling high adapter.
The utility model is compared with prior art can produce following good effect:
1. adopt two-way frequency conversion trunking scheme; Receive frequency fx is downconverted into fy and sends; Receive frequency is that fy is up-converted into the fx transmission; Do not have propagation delay time without the modulation process in the frequency conversion relay processes, do not reduce transmission speed but do not have error correcting capability, multistage relaying disturbs accumulation.
2. two-way frequency conversion relaying and the collocation of forward relay mode science are used; Eliminate the influence that the multistage frequency conversion relaying disturbs accumulation with the fault-tolerant or error correcting technique in the forward relay modulation; Just can realize that with the one-level forward relay communication speed only reduces by 7 grades of relayings of one times, can satisfy the data communication requirement of medium voltage network fully.
3. utilize analog switch and singlechip technology to realize the intelligent channel conversion in the two-way frequency conversion relay processes.
4. utilize cheap LM567 phase-locked loop to realize the channel filtering of demodulation of phase locking and high squareness factor.
5. utilize parallel resonance to realize the coupling of inductance arrowband, plug-in arrowband, utilize ferrite porcelain jar coiling impedance adapter, make the coupling adapter volume little, in light weight, cheap, easy for installation.
6. the communication system of institute's utility model is specially adapted to the demand that the 10KV intelligent grid is built.
The utility model utilizes three channel frequency f
1, f
2, f
3Constitute the special-purpose power line carrier relay communications system of a cover 10KV ground cable electrical network with the scientific combination at two-way frequency conversion link terminal and forward relay terminal.Owing to adopted three grades of frequency conversions to insert the combination trunking scheme that one-level is transmitted, so system can take into account the accuracy that communication speed can ensure transfer of data again.Two-way frequency conversion terminal is with the two-way control of monolithic computer combination analog switch implementation frequency conversion relaying, with cheap LM567 phase-locked loop reality horizontal lock filtering, the amplification of separating the mediation frequency variation signal.Since system adopted plug-in arrowband inductance coupling high technology make the signal Coupling device of power line carrier volume, weight, install and use, mounting condition, the investment capacity, the instructions for use of cost cost and 10KV electrical network mate comprehensively.
Description of drawings:
The structural principle sketch map of Fig. 1 the utility model;
Fig. 2 is the profile sketch map of the plug-in arrowband inductance coupling high adapter of Fig. 1;
Fig. 3 is the schematic diagram of the plug-in arrowband inductance coupling high adapter of Fig. 1;
Fig. 4 is the theory diagram of the carrier data transceiver terminal of Fig. 1.
Fig. 5 is the theory diagram of the two-way frequency conversion link terminal of Fig. 1.
Embodiment: formula ground cable power line carrier relay communications system (referring to Fig. 1) is replied in the one-to-many half-duplex; By carrier data transceiver terminal 1, plug-in arrowband inductance coupling high adapter 2, two-way frequency conversion link terminal 3, on the ground cable plc data transmission system formed of cable 4; Adopt two kinds of patterns of two-way frequency conversion relaying and forward relay and form the novel middle PLC of pressure number and pass system by the link combinations form of the slotting one-level forward relay of three grades of frequency conversions; Two-way frequency conversion relaying does not have the non-time delay of modulation process; But its interference effects at different levels are accumulated during multistage continuous relaying; Though communication speed of forward relay relaying reduces by one times; But can adopt influence fault-tolerant, that error correction coding is eliminated multistage frequency conversion relaying interference accumulation in its modulation process, adopt 3 grades of frequency conversion relayings to insert the one-level forward relays, the demand that can satisfy communication speed can ensure that again the transmission data are accurate.
The one-to-many half-duplex is replied formula ground cable power line carrier relay communications system by carrier data transceiver terminal 1, plug-in arrowband inductance coupling high adapter 2, the two-way frequency conversion link terminal 3 of carrier wave; Ground cable 4 is formed; Carrier data transceiver terminal 1 has data transmit-receive and two kinds of mode of operations of data forwarding, and the two-way frequency conversion link terminal 3 of carrier wave has data transmit-receive and two kinds of mode of operations of frequency conversion relaying, and actual networking can be according to demand by its mode of operation of software set in using; System adopts ground cable screen to do communications carrier; Carrier signal is done the loop transmission with screen and the earth, and cable 4 segmentations in ground connect successively, the equal ground connection of screen at cable two ends, every section ground; The both sides of each earth point respectively are provided with a plug-in arrowband inductance coupling high adapter 2; Install because the ground cable is segmentation, the screen at every section two ends is ground connection all, so the signal coupling adopts segmented couples.When signal amplitude is enough, need not relaying; As long as couple together two plug-in arrowband inductance coupling high adapters 2; When increasing signal attenuation with the cable joint number that lands to need add relaying the time; As long as receive two plug-in arrowband inductance coupling high adapters 2 respectively on two-way frequency conversion link terminal 3 corresponding two interfaces of carrier wave, when the existing three grades of frequency conversion relayings in front also need fourth stage relaying, then receive carrier data transceiver terminal 1 to two plug-in arrowband inductance coupling high adapters 2 and get final product.When fourth stage forward relay still can not satisfy the demands, the relaying of back recovered to use the two-way frequency conversion link terminal of carrier wave again, by that analogy.
The data message that main website sends is modulated on the carrier wave by carrier data transceiver terminal 1; Plug-in arrowband inductance coupling high adapter 2 is coupled on the screen of ground cable 4; At cable node place two inductance coupling high adapters 2 are connected; When increase signal attenuation two-way frequency conversion link terminal 3 of loading wave then to need add relaying the time with the cable joint number that lands; If also need behind three grades of two-way frequency conversion link terminals 3 of carrier wave relaying then fourth stage relaying change carrier data transceiver terminal 1 into, the level V relaying returns to the two-way frequency conversion link terminal 3 of carrier wave again and gets final product.
Plug-in arrowband inductance coupling high adapter 2 (referring to Fig. 2, Fig. 3) is formed by being connected to ground outer inductive coupler L, capacitor C and the impedance adapter SP of cable screen; The ferrite semicircle magnet ring that inductive coupler L adopts two bores and ground cable external diameter to mate; Wherein half coils and forms the plug-in inductive coupler; Impedance adapter SP adopts the ferrite magnetic tank coiling to form; Inductive coupler L, impedance adapter SP secondary coil and capacitor C are formed parallel resonance, and it is 75 Ω that the tap of selection adapter primary coil makes the adapter primary impedance.Suitably selecting the inductance capacitance value to make resonance frequency is that required frequency constitutes inductance arrowband coupling adapter.
Carrier data transceiver terminal 1 (referring to Fig. 4); It comprises receiving filter 1-1, power amplifier 1-2, and receiving filter 1-1 connects demodulator 1-3, and demodulator 1-3 connects monolithic computer 1-4; Monolithic computer 1-4 connects RS485 interface 1-5, and RS485 interface 1-5 connects RS485 bus 1-6.Receiving filter 1-1 and power amplifier 1-2 all are connected with plug-in arrowband inductance coupling high adapter 2.Signal through the plug-in arrowband inductance coupling high adapter 2 coupling carry out filtering, be demodulated to data and send single-chip microcomputer 1-4; Single-chip microcomputer is seen data off through RS485 interface 1-5 and RS485 bus 1-6; Data by RS485 bus 1-6 comes are sent single-chip microcomputer 1-4; Single-chip microcomputer 1-4 carries out carrier modulation to the data of accepting and send power amplification, and the power carrier signal is sent to power line through coupling adapter 2.
The two-way frequency conversion link terminal 3 of carrier wave (referring to Fig. 5); It comprises first filter 101, second filter 102, the 3rd filter 103, the 4th filter 104, first analog switch 201, second analog switch 202, the 3rd analog switch 203, the 4th analog switch 204, the 5th analog switch 205, the 6th analog switch 206, amplitude limiter 3-1, frequency mixer 3-2, LM567 phase-locked loop 3-3, amplification shaping device 3-4, power amplifier 3-5, RS485 interface 3-7 and single-chip microcomputer 3-6; Single-chip microcomputer 3-6 connects first analog switch 201, second analog switch 202, the 3rd analog switch 203, the 4th analog switch 204, the 5th analog switch 205, the 6th analog switch 206, frequency mixer 3-2, LM567 phase-locked loop 3-3, amplification shaping device 3-4, power amplifier 3-5, RS485 interface 3-7 respectively; First analog switch 201 connects and connects first filter 101, second analog switch 202, power amplifier 3-5, plug-in arrowband inductance coupling high adapter 2 respectively; First filter 101 connects the 3rd filter 103, amplitude limiter 3-1; The 3rd filter 103 connects second analog switch 202; Amplitude limiter 3-1 connects frequency mixer 3-2; Frequency mixer 3-2 connects the 3rd analog switch 203, the 4th analog switch 204 respectively; The 3rd analog switch 203 connects second filter 102; Second filter 102 connects LM567 phase-locked loop 3-3, the 4th filter 104 respectively; The 4th filter 104 connects the 4th analog switch 204; LM567 phase-locked loop 3-3 connects the 5th analog switch 205, the 6th analog switch 206, amplification shaping device 3-4, and the 6th analog switch 206 connects power amplifier 3-5, and power amplifier 3-5 connects second analog switch 202, plug-in arrowband inductance coupling high adapter 2 respectively.First filter 101, second filter 102 are identical; The 3rd filter 103, the 4th filter 104 are identical; All analog switch states are by Single-chip Controlling; Two-way frequency conversion link terminal 3 has pattern 1 and 2 two kinds of mode of operations of pattern, the data transceiver terminal 1 of single-chip microcomputer pattern control line---bi-directional frequency converter repeater 3 is pattern 2 during low level---band frequency conversion relay function that is pattern 1 during for high level.
Described pattern 1---the mode of operation of two-way frequency changing repeater is: static single-chip microcomputer is down connected analog switch 201,204,205, and 202,203,206 break off, and the single-chip microcomputer serial interface closes up and closes; LM567 phase-locked loop nature frequency of oscillation is fy; Equipment is in the descending frequency conversion wait state of fx → fy, when receiving fx, becomes 3 pin that fy delivers to the LM567 phase-locked loop through mixing and filtering, and 8 pin locking indication becomes 0 behind the LM567 pll lock; Single-chip microcomputer is opened analog switch 6 and is sent fy; The locking indication replys 1 after fx finishes, and single-chip microcomputer is connected analog switch 2,3 and broken off 1,4,5,6, and LM567 vibrates at fx naturally; Be in fy → fx up-conversion wait state; Mixing and filtering becomes fy into fx when receiving fy, and the locking indication becomes 0 by 1, and single-chip microcomputer is connected analog switch 6 and sent fx; Fy finish the back single-chip microcomputer with the recovering state of analog switch to the down-conversion wait state, if the up-conversion stand-by period during greater than setting (what communication failure of back) single-chip microcomputer will automatically restore to the down-conversion wait state.
Described pattern 2---the data transceiver terminal of band frequency conversion relaying; The serial interface of single-chip microcomputer closes up to be arranged on and opens accepting state; All there is the address code of oneself at each terminal and is located at code stream foremost; Single-chip microcomputer nonintervention frequency converter when the address is not oneself; Single-chip microcomputer breaks off all analog switches when being oneself, and the frequency converter single-chip microcomputer of withdrawing from the arena is seen demodulating data off and sent power amplification to send the data-modulated carrier wave that the RS485 mouth receives through the RS485 interface, recovery down-conversion wait state after having sent.
The one-to-many half-duplex is replied the scientific combination of formula 10KV ground cable power line carrier relay communications system through two-way frequency conversion relaying and forward relay and has been realized that data high-speed transmits accurately; Guaranteed the real-time index of communication effectively; It has significant advantage than present popular single-frequency forward relay mode; Press the communications platform of intelligent grid in being particularly suitable for doing, ordinary circumstance is divided into three frequency f
1, f
2, f
3, the up-downgoing repeater mode is:
Claims (6)
1. formula ground cable power line carrier relay communications system is replied in the one-to-many half-duplex; It is characterized in that it comprises carrier data transceiver terminal (1); Plug-in arrowband inductance coupling high adapter (2), cable (4); Ground cable (4) segmentation connects successively, the equal ground connection of screen at cable (4) two ends, every section ground, and the both sides of each earth point respectively are provided with a plug-in arrowband inductance coupling high adapter (2); First plug-in arrowband inductance coupling high adapter (2) on first section ground cable (4) connects carrier data transceiver terminal (1), and adjacent two plug-in arrowband inductance coupling high adapters (2) of adjacent segment ground cable (4) connect.
2. formula ground cable power line carrier relay communications system is replied in one-to-many half-duplex according to claim 1; It is characterized in that being provided with the frequency conversion relaying, every grade of frequency conversion relaying is connected two interfaces formations of two-way frequency conversion link terminal (3) respectively by adjacent two plug-in arrowband inductance coupling high adapters (2) of adjacent segment ground cable (4).
3. formula ground cable power line carrier relay communications system is replied in one-to-many half-duplex according to claim 2; It is characterized in that being provided with forward relay behind described per three grades of frequency conversion relayings, forward relay is made up of adjacent two plug-in arrowband inductance coupling high adapters (2) carrier data transceiver terminals of connection (1) of adjacent segment ground cable (4).
4. formula ground cable power line carrier relay communications system is replied in one-to-many half-duplex according to claim 2; It is characterized in that the two-way frequency conversion link terminal of described carrier wave (3) comprises single-chip microcomputer (3-6); Single-chip microcomputer (3-6) connects first analog switch (201), second analog switch (202), the 3rd analog switch (203), the 4th analog switch (204), the 5th analog switch (205), the 6th analog switch (206), frequency mixer (3-2), LM567 phase-locked loop (3-3), amplification shaping device (3-4), power amplifier (3-5), RS485 interface (3-7) respectively; First analog switch (201) connect connect respectively first filter (101), second analog switch (202, power amplifier (3-5), plug-in arrowband inductance coupling high adapter (2); First filter (101) connects the 3rd filter (103), amplitude limiter (3-1); The 3rd filter (103) connects second analog switch (202; Amplitude limiter (3-1) connects frequency mixer (3-2); Frequency mixer (3-2) connects the 3rd analog switch (203), the 4th analog switch (204) respectively; The 3rd analog switch (203) connects second filter (102); Second filter (102) connects LM567 phase-locked loop (3-3), the 4th filter (104) respectively, and (104 connect the 4th analog switch (204) to the 4th filter, and LM567 phase-locked loop (3-3) connects the 5th analog switch (205), the 6th analog switch (206), amplification shaping device (3-4); The 6th analog switch (206) connects power amplifier (3-5); Power amplifier (3-5) connects second analog switch (202), plug-in arrowband inductance coupling high adapter (2) respectively, and first filter (101), second filter (102) are identical, and the 3rd filter (103), the 4th filter (104) are identical.
5. formula ground cable power line carrier relay communications system is replied in one-to-many half-duplex according to claim 1; It is characterized in that described plug-in arrowband inductance coupling high adapter (2) forms by being connected to ground outer inductive coupler L, capacitor C and the impedance adapter SP of cable screen; The ferrite semicircle magnet ring that inductive coupler L adopts two bores and ground cable external diameter to mate; Wherein half coils and forms the plug-in inductive coupler, and impedance adapter SP adopts the ferrite magnetic tank coiling to form.
6. formula ground cable power line carrier relay communications system is replied in one-to-many half-duplex according to claim 1; It is characterized in that described carrier data transceiver terminal (1) comprises receiving filter (1-1), power amplifier (1-2); Receiving filter (1-1) connects demodulator (1-3); Demodulator (1-3) connects monolithic computer (1-4); Monolithic computer (1-4) connects RS485 interface (1-5), and RS485 interface (1-5) connects RS485 bus (1-6), and receiving filter (1-1) and power amplifier (1-2) all are connected with plug-in arrowband inductance coupling high adapter (2).
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| CN 201220252726 CN202634425U (en) | 2012-05-31 | 2012-05-31 | One-to-many half-duplex responsive cable power line carrier relay communication system |
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| CN 201220252726 CN202634425U (en) | 2012-05-31 | 2012-05-31 | One-to-many half-duplex responsive cable power line carrier relay communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710292A (en) * | 2012-05-31 | 2012-10-03 | 山东电力集团公司烟台供电公司 | One-to-many half-duplex responsive ground cable power line carrier relay communication system |
| WO2021104386A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Power line communication apparatus and power generating system |
-
2012
- 2012-05-31 CN CN 201220252726 patent/CN202634425U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710292A (en) * | 2012-05-31 | 2012-10-03 | 山东电力集团公司烟台供电公司 | One-to-many half-duplex responsive ground cable power line carrier relay communication system |
| CN102710292B (en) * | 2012-05-31 | 2014-05-07 | 国家电网公司 | One-to-many half-duplex responsive ground cable power line carrier relay communication system |
| WO2021104386A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Power line communication apparatus and power generating system |
| US11637589B2 (en) | 2019-11-28 | 2023-04-25 | Huawei Digital Power Technologies Co., Ltd. | Power line communication apparatus and power generating system |
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Owner name: SHANDONG ELECTRIC POWER CORPORATION YANTAI POWER S Effective date: 20130510 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: SHANDONG ELECTRIC POWER CORPORATION YANTAI POWER SUPPLY CO., LTD. Effective date: 20130510 |
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