CN107566012A - Power line carrier communication in-site modeling test system - Google Patents
Power line carrier communication in-site modeling test system Download PDFInfo
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- CN107566012A CN107566012A CN201710720973.6A CN201710720973A CN107566012A CN 107566012 A CN107566012 A CN 107566012A CN 201710720973 A CN201710720973 A CN 201710720973A CN 107566012 A CN107566012 A CN 107566012A
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Abstract
The invention discloses a kind of power line carrier communication in-site modeling test system, including electric power processing system, n carrier signal attenuation control circuit, first order system load, first order system power table, m electric energy meter and master switch, each carrier signal attenuation control circuit includes carrier signal attenuator and the load electrically connected with carrier signal attenuator.The present invention has the advantages that：Present system platform is simple, and cost is low；The system can carry out the detection of various performances and function, can the long-term monitoring stability of a system；Realize the detection of the carrier communication reliability of the meter class product such as electric energy meter, concentrator；Simulation electric energy meter class product actual motion reliability can be achieved.
Description
Technical field
It is relatively low more particularly, to a kind of cost the present invention relates to power-line carrier communication system technical field, detection function
It is more, the energy long-term monitoring stability of a system, the power line carrier communication of simulation electric energy meter class product actual motion reliability can be achieved
In-site modeling test system.
Background technology
Power carrier is the distinctive communication mode of power system, and power carrier communication refers to utilize existing power line, passed through
Carrier system carries out analog or digital signal the technology of high-speed transfer.Maximum feature is need not to set up network again, as long as
Live wire, with regard to data transfer can be carried out.Flourishing for intelligent electric meter market, has driven matched power line carrier communication
The development and application of technology and product.In Chinese market, most of intelligent electric meter is using power-line carrier communication, electricity
The sales volume of line of force carrier chip reached more than 7,000 ten thousand in 2011.But in so large-scale application, power line carrier is led to
The problem that the letter system long-standing meter reading cycle is long, meter reading success rate is not high, meanwhile, tested in the pattern of coherent detection mechanism
All only it is the single test to sending the function, performance of test sample machine progress unit, to vital carrier network communication performance but
Long-term unified detection can not be carried out.
The content of the invention
The present invention in order to overcome in the prior art power line carrier communication in-site modeling test system detection function it is single, no
The deficiency of long-term system monitoring and detection can be carried out, it is proposed that a kind of cost is relatively low, and detection function is more, can long-term monitoring system
System stability, the power line carrier communication in-site modeling test system of simulation electric energy meter class product actual motion reliability can be achieved
System.
To achieve these goals, present invention employs following technical scheme：
A kind of power line carrier communication in-site modeling test system, including power supply processing circuit, n carrier signal decay control
Circuit, first order system load, first order system power table, m electric energy meter and master switch processed, each carrier signal adjustable attenuation
Circuit includes carrier signal attenuator and the load electrically connected with carrier signal attenuator；One end of master switch is electrically connected with power supply
Connect；The other end of master switch respectively with power supply processing circuit, one end of first order system power table, each carrier signal attenuator
Electrically connected with one end of each electric energy meter；The other end of first order system power table and one end of first order system load are electrically connected
Connect, the other end of each electric energy meter electrically connects with one end of respective load；Power supply processing circuit, the decay of each carrier signal
The other end of device, the other end of first order system load and each load is and power electric connection.
The present invention is handled using carrier signal attenuation control circuit to undressed power supply or by power supply processing circuit
The carrier signal of power supply decayed, it is possible to achieve to actual loading and the test of fictitious load various functions and performance, build
Unified test environment is found.
Preferably, also include power supply switching contactor and n load switching contactor；One end of power supply switching contactor
Electrically connected with power supply processing circuit, one end of the other end of power supply switching contactor and each load switching contactor is and carrier wave
Signal attenuation control circuit electrically connects, and the other end of each load switching contactor electrically connects with load.
Preferably, power supply processing circuit includes earth leakage circuit-breaker, pressure regulator, power-supply filter, isolating transformer；Leakage
One end of electric protective circuit breaker and power electric connection, the other end of earth leakage circuit-breaker electrically connect with the input of pressure regulator, pressure regulation
The adjustment end of device electrically connects with one end of power-supply filter, the output end and power electric connection of pressure regulator, power-supply filter it is another
One end electrically connects with the primary side of isolating transformer.
As preferential, one end of the secondary side of isolating transformer electrically connects with one end of first order system power table, and first
The other end of level system power table electrically connects with one end of first order system load, and the other end of first order system load is with isolating
The other end electrical connection of the secondary side of transformer.
Preferably, also including MCU and display, MCU electrically connects with display and each carrier signal attenuator respectively.
Preferably, comprise the following steps：
The initial value that the initial value provided with j is 1, i in (6-1) MCU is 1, provided with fault threshold E；
(6-2) MCU calculates the current signal u (t) of carrier signal attenuator local maximum and inserted by cubic spline
Value obtains coenvelope line uup(t)；
(6-3) calculates signal u (t) local minimum and obtains lower envelope line u by cubic spline interpolationlow(t)；
(6-4) defines average envelope m1(t)=[uup(t)+ulow(t)]/2；
(6-5) utilizes formula hj(t)=u (t)-mj(t) calculating difference hj(t)；
(6-6) is if hj(t) IMF screening stop conditions are unsatisfactory for, make u (t)=hj(t), j values increase by 1, continues to hj(t) enter
Row decomposes；Work as hj(t) meet that IMF sieves stop condition, then obtain the 1st IMF components c of u (t) signals1(t)=hj(t)；
(6-7) utilizes formula ri(t)=u (t)-ci(t) residual components r is calculatedi(t)；
(6-8) works as ri(t) when being unsatisfactory for decomposing stop condition, u (t)=r is madei(t) i values is increased by 1, continue to ri(t)
Decomposed；When meeting to sieve stop condition, if n1=i, n1 IMF components c is obtainediAnd 1 residual components r (t)n(t), u
(t) can then be expressed asExtract ci(t) N number of sample value ci(k), k=1,2 ..., N；
(6-9) MCU utilizes formulaU (t) each component energy is calculated, compares u (t) each component energy
Measure Emax, choose E1,E2,...,EnMiddle maximum Emax, work as EmaxDuring ＞ E, MCU makes the judgement of carrier signal attenuator failure,
Display shows the information of carrier signal attenuator failure；MCU control carrier signal attenuators are stopped；
Work as EmaxDuring≤E, power line carrier communication in-site modeling test system normal work；
Wherein, (6-6), the screening stop condition of (6-8) use imitative Cauchy's test for convergence,Work as SDSieve and stop during ＜ ε, for ε generally between 0.2 and 0.3, T is to set
Fixed constant；Decomposition stop condition is residual signal ri(t) it is changed into monotonic function.
Preferably, n is 2 to 7.
Therefore, the present invention has the advantages that：(1) present system platform is simple, and cost is low；(2) system can
, can the long-term monitoring stability of a system to carry out the detection of various performances and function；(3) meters such as electric energy meter, concentrator are realized
The detection of the carrier communication reliability of class product；(4) simulation electric energy meter class product actual motion reliability can be achieved.
Brief description of the drawings
A kind of circuit diagram of Fig. 1 present invention；
A kind of circuit diagram of the power supply processing circuit of Fig. 2 present invention.
In figure：Power supply processing circuit 1, carrier signal attenuation control circuit 2, first order system load 3, first order system electricity
Can table 4, electric energy meter 5, master switch 6, pressure regulator 11, power-supply filter 12, isolating transformer 13, carrier signal attenuator 21, negative
Carry 22.
Embodiment
The present invention is described further with embodiment below in conjunction with the accompanying drawings：
Embodiment as shown in Figure 1 is a kind of power line carrier communication in-site modeling test system, including power supply processing electricity
It is 1,2, road carrier signal attenuation control circuit 2, first order system load 3,4,2 electric energy meters 5 of first order system power table, total
Switch 6, power supply switching contactor and 2 load switching contactors, each carrier signal attenuation control circuit, which includes carrier wave, to be believed
Number attenuator 21 and the load 22 electrically connected with carrier signal attenuator；One end of master switch and power electric connection；Master switch
The other end respectively with power supply processing circuit, one end of first order system power table, each carrier signal attenuator and each electric energy
One end electrical connection of table；The other end of first order system power table electrically connects with one end of first order system load, each electric energy
The other end of table electrically connects with one end of respective load；Power supply processing circuit, each carrier signal attenuator, first order system
The other end of load and the other end of each load are and power electric connection；One end of power supply switching contactor and power supply processing electricity
Road electrically connect, the other end of power supply switching contactor and it is each load switching contactor one end with carrier signal adjustable attenuation
Circuit electrically connects, and the other end of each load switching contactor electrically connects with load.
As shown in Fig. 2 power supply processing circuit includes earth leakage circuit-breaker, pressure regulator 11, power-supply filter 12, isolation transformation
Device 13；One end of earth leakage circuit-breaker and power electric connection, the other end of earth leakage circuit-breaker and the input of pressure regulator are electrically connected
Connect, the adjustment end of pressure regulator electrically connects with one end of power-supply filter, the output end and power electric connection of pressure regulator, power filter
The other end of device electrically connects with the primary side of isolating transformer, one end and the first order system power of the secondary side of isolating transformer
One end electrical connection of table, the other end of first order system power table electrically connect with one end of first order system load, first order system
The other end of system load electrically connects with the other end of the secondary side of isolating transformer.
In addition, also including MCU and display, MCU electrically connects with display and each carrier signal attenuator respectively；In electricity
Before road is started working, fault detect first is carried out to carrier signal attenuator, comprised the following steps：
The initial value that the initial value provided with j is 1, i in MCU is 1, provided with fault threshold E；
MCU calculates the current signal u (t) of carrier signal attenuator local maximum and obtained by cubic spline interpolation
Coenvelope line uup(t)；
Calculate signal u (t) local minimum and lower envelope line u is obtained by cubic spline interpolationlow(t)；
Define average envelope m1(t)=[uup(t)+ulow(t)]/2；
Utilize formula hj(t)=u (t)-mj(t) calculating difference hj(t)；
If hj(t) IMF screening stop conditions are unsatisfactory for, make u (t)=hj(t) j values increase by 1, continues to hj(t) divided
Solution；Work as hj(t) meet that IMF sieves stop condition, then obtain the 1st IMF components c of u (t) signals1(t)=hj(t)；
Utilize formula ri(t)=u (t)-ci(t) residual components r is calculatedi(t)；
Work as ri(t) when being unsatisfactory for decomposing stop condition, u (t)=r is madei(t) i values is increased by 1, continue to ri(t) divided
Solution；When meeting to sieve stop condition, if n1=i, n1 IMF components c is obtainediAnd 1 residual components r (t)n(t), u (t) is then
It can be expressed asExtract ci(t) N number of sample value ci(k), k=1,2 ..., N；
MCU utilizes formulaU (t) each component energy is calculated, compares u (t) each component energy Emax,
Choose E1,E2,...,EnMiddle maximum Emax, work as EmaxDuring ＞ E, MCU makes the judgement of carrier signal attenuator failure, display
Show the information of carrier signal attenuator failure；MCU control carrier signal attenuators are stopped；
Work as EmaxDuring≤E, power line carrier communication in-site modeling test system normal work；
Wherein, sieve stop condition and use imitative Cauchy's test for convergence,When
SDSieve and stop during ＜ ε, for ε generally between 0.2 and 0.3, T is the constant of setting；Decomposition stop condition is residual signal ri
(t) it is changed into monotonic function.
The course of work of the present invention：
Master switch is closed, power line carrier communication in-site modeling is selected by the break-make of the contact of power supply switching contactor
The power supply of test system；
If necessary to carry out the test of actual loading, the contact of switching load switching contactor, actual loading is believed with carrier wave
The connection of number attenuator, the contact of Switching power switching contactor, directly inputs the power supply without power supply processing circuit processing, for electricity
The offer power supply of powerline carrier communication in-site modeling test system；
If necessary to carry out the test of fictitious load, the contact of switching load switching contactor, fictitious load is believed with carrier wave
The connection of number attenuator, the contact of Switching power switching contactor, by power input to power supply processing circuit；Power supply is protected by leaking electricity
Shield switch access power supply processing circuit, supply voltage is adjusted to suitable magnitude of voltage by pressure regulator；After pressure regulator adjusts
Interference signal in power utilization power-supply filter insulating power supply, ensure the carrier signal in input simulated testing system without clutter
Signal；Power supply is isolated by isolating transformer with carrier signal attenuation control circuit, other interference isolated in simultaneously decaying power supplies
Signal, it is the muting test environment of offer of power line carrier communication in-site modeling test system；
When power supply passes through first order system power table and first order system load, first order system load is believed carrier wave
Number decayed, input of the carrier signal after decay as second level system power table；
Pass through second level system again after the system power table of the second level by the carrier signal that first order system attenuation is crossed
Carrier signal attenuator carry out high-frequency signal decay, the carrier signal after decay is as the defeated of next stage system power table
Enter, carry out carrier signal decay by that analogy, until afterbody electric energy end of list (EOL).
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After having read the content of the invention lectured, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (7)
1. a kind of power line carrier communication in-site modeling test system, it is characterised in that including power supply processing circuit (1), n load
Ripple signal attenuation control circuit (2), first order system load (3), first order system power table (4), m electric energy meter (5) and total
Switch (6), each carrier signal attenuation control circuit is electric including carrier signal attenuator (21) and with carrier signal attenuator
The load (22) of connection；One end of master switch and power electric connection；The other end of master switch respectively with power supply processing circuit, first
One end electrical connection of level one end of system power table, each carrier signal attenuator and each electric energy meter；First order system power
The other end of table electrically connects with one end of first order system load, and the other end of each electric energy meter is electric with one end of respective load
Connection；Power supply processing circuit, each carrier signal attenuator, the other end of first order system load and the other end of each load
And power electric connection.
2. power line carrier communication in-site modeling test system according to claim 1, it is characterised in that also including power supply
Switching contactor and n load switching contactor；One end of power supply switching contactor is electrically connected with power supply processing circuit, and power supply is cut
One end of the other end of changing-over tentaculum and each load switching contactor electrically connects with carrier signal attenuation control circuit, each
The other end for loading switching contactor electrically connects with load.
3. power line carrier communication in-site modeling test system according to claim 1, it is characterised in that at the power supply
Managing circuit includes earth leakage circuit-breaker, pressure regulator (11), power-supply filter (12), isolating transformer (13)；Earth leakage circuit-breaker
One end and power electric connection, the other end of earth leakage circuit-breaker electrically connected with the input of pressure regulator, the adjustment end of pressure regulator
Electrically connected with one end of power-supply filter, the output end and power electric connection of pressure regulator, the other end of power-supply filter is with isolating
The primary side electrical connection of transformer.
4. power line carrier communication in-site modeling test system according to claim 3, it is characterised in that isolating transformer
One end of secondary side electrically connected with one end of first order system power table, the other end and the first order of first order system power table
The other end of one end electrical connection of system load, the other end of first order system load and the secondary side of isolating transformer is electrically connected
Connect.
5. power line carrier communication in-site modeling test system according to claim 1, it is characterised in that also including MCU
And display, MCU electrically connect with display and each carrier signal attenuator respectively.
6. power line carrier communication in-site modeling test system according to claim 5, it is characterised in that including following step
Suddenly：
The initial value that the initial value provided with j is 1, i in (6-1) MCU is 1, provided with fault threshold E；
(6-2) MCU calculates the current signal u (t) of carrier signal attenuator local maximum and obtained by cubic spline interpolation
Obtain coenvelope line uup(t)；
(6-3) calculates signal u (t) local minimum and obtains lower envelope line u by cubic spline interpolationlow(t)；
(6-4) defines average envelope m1(t)=[uup(t)+ulow(t)]/2；
(6-5) utilizes formula hj(t)=u (t)-mj(t) calculating difference hj(t)；
(6-6) is if hj(t) IMF screening stop conditions are unsatisfactory for, make u (t)=hj(t), j values increase by 1, continues to hj(t) divided
Solution；Work as hj(t) meet that IMF sieves stop condition, then obtain the 1st IMF components c of u (t) signals1(t)=hj(t)；
(6-7) utilizes formula ri(t)=u (t)-ci(t) residual components r is calculatedi(t)；
(6-8) works as ri(t) when being unsatisfactory for decomposing stop condition, u (t)=r is madei(t) i values is increased by 1, continue to ri(t) carry out
Decompose；When meeting to sieve stop condition, if n1=i, n1 IMF components c is obtainediAnd 1 residual components r (t)n(t), u (t)
It can then be expressed asExtract ci(t) N number of sample value ci(k), k=1,2 ..., N；
(6-9) MCU utilizes formulaU (t) each component energy is calculated, compares u (t) each component energy
Emax, choose E1,E2,...,EnMiddle maximum Emax, work as EmaxDuring ＞ E, MCU makes the judgement of carrier signal attenuator failure, shows
Show that device shows the information of carrier signal attenuator failure；MCU control carrier signal attenuators are stopped；
Work as EmaxDuring≤E, power line carrier communication in-site modeling test system normal work；
Wherein, (6-6), the screening stop condition of (6-8) use imitative Cauchy's test for convergence,Work as SDSieve and stop during ＜ ε, for ε generally between 0.2 and 0.3, T is to set
Fixed constant；Decomposition stop condition is residual signal ri(t) it is changed into monotonic function.
7. the power line carrier communication in-site modeling test system according to claim 1 or 2 or 3 or 4 or 5 or 6, its feature
It is, n is 2 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720973.6A CN107566012A (en) | 2017-08-21 | 2017-08-21 | Power line carrier communication in-site modeling test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720973.6A CN107566012A (en) | 2017-08-21 | 2017-08-21 | Power line carrier communication in-site modeling test system |
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| Publication Number | Publication Date |
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| CN107566012A true CN107566012A (en) | 2018-01-09 |
Family
ID=60975839
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710720973.6A Pending CN107566012A (en) | 2017-08-21 | 2017-08-21 | Power line carrier communication in-site modeling test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114899893A (en) * | 2022-05-12 | 2022-08-12 | 深圳市拓普联科技术股份有限公司 | Power line communication module, equipment, communication method, system and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236892A (en) * | 2013-04-18 | 2013-08-07 | 国家电网公司 | Carrier communication testing system |
| CN203691397U (en) * | 2014-01-26 | 2014-07-02 | 瑞斯康微电子（深圳）有限公司 | Power line carrier communication test device |
| CN204119227U (en) * | 2014-09-25 | 2015-01-21 | 国家电网公司 | Intelligent electric meter carrier communication module test gimulator |
| CN105182270A (en) * | 2015-07-31 | 2015-12-23 | 华立仪表集团股份有限公司 | Device and method of electric energy meter voltage-withstand test |
| CN205070993U (en) * | 2015-10-30 | 2016-03-02 | 厦门中天微电子科技有限公司 | Power line communication module testing arrangement |
| CN105818690A (en) * | 2016-03-02 | 2016-08-03 | 康迪电动汽车（上海）有限公司 | High-voltage power distribution device and control method |
-
2017
- 2017-08-21 CN CN201710720973.6A patent/CN107566012A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236892A (en) * | 2013-04-18 | 2013-08-07 | 国家电网公司 | Carrier communication testing system |
| CN203691397U (en) * | 2014-01-26 | 2014-07-02 | 瑞斯康微电子（深圳）有限公司 | Power line carrier communication test device |
| CN204119227U (en) * | 2014-09-25 | 2015-01-21 | 国家电网公司 | Intelligent electric meter carrier communication module test gimulator |
| CN105182270A (en) * | 2015-07-31 | 2015-12-23 | 华立仪表集团股份有限公司 | Device and method of electric energy meter voltage-withstand test |
| CN205070993U (en) * | 2015-10-30 | 2016-03-02 | 厦门中天微电子科技有限公司 | Power line communication module testing arrangement |
| CN105818690A (en) * | 2016-03-02 | 2016-08-03 | 康迪电动汽车（上海）有限公司 | High-voltage power distribution device and control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114899893A (en) * | 2022-05-12 | 2022-08-12 | 深圳市拓普联科技术股份有限公司 | Power line communication module, equipment, communication method, system and storage medium |
| CN114899893B (en) * | 2022-05-12 | 2023-10-27 | 深圳市拓普联科技术股份有限公司 | Power line communication module, power line communication device, power line communication method, power line communication system and storage medium |
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