CN106330260B - The laboratory test device and method of low voltage power line carrier performance - Google Patents
The laboratory test device and method of low voltage power line carrier performance Download PDFInfo
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- CN106330260B CN106330260B CN201610712210.2A CN201610712210A CN106330260B CN 106330260 B CN106330260 B CN 106330260B CN 201610712210 A CN201610712210 A CN 201610712210A CN 106330260 B CN106330260 B CN 106330260B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
Abstract
The present invention relates to the laboratory test devices and method of a kind of low voltage power line carrier performance.The object of the present invention is to provide the laboratory test devices and method of a kind of low voltage power line carrier performance of analog site environment factor.The technical scheme is that AC power source connects adjustable transformer input terminal through four circuit breakers, adjustable transformer output end connects computer through power supply line after isolated location, and adjustable transformer output end is also electrically connected carrier test jig through artificial mains network A；Adjustable transformer output end also connects carrier wave with artificial mains network B through isolated location and waits for measurement fixture；The RF of artificial mains network A connects the RF of artificial mains network B through adjustable attenuator with power divider；Spectrum analyzer and signal generator are connected on power divider；Power divider and artificial mains network B tie point connect oscillograph；Adjustable transformer output end is separately connected spectrum analyzer, signal generator and oscillograph through isolated location and power supply line；Computer is communicated by connection and carrier test jig, oscillograph, spectrum analyzer and signal generator.
Description
Technical field
The present invention relates to the laboratory test devices and method of a kind of low voltage power line carrier performance.Suitable for power information
The technical testing field of the low voltage power line carrier of acquisition.
Background technique
As needs of the whole world to power information concentrated collection are more more and more intense, so needing a kind of stabilization, reliable logical
News technology, to support Utilities Electric Co. to the acquisition of the power information of electric supply meter data, load control system, data monitoring, line loss point
The AMI/AMR demands such as analysis.At this stage, low voltage power line carrier is the communication applied to the mainstream of concentrator/gateway to ammeter end
Mode is widely used in solving last 1 kilometer of the Communication of AMI/AMR.
Since the access amount of the tremendous influence that power line is loaded by resident and industrial user, load is different, generate
Noise it is different, will lead to load impedance, noise jamming of one day different periods etc. may all be not quite similar.Research statistics, electricity
Line of force load impedance changes between the Ω of 0.1 Ω~100, and the communication effect to low voltage power line carrier is one and greatly examines
It tests.
In order to improve low voltage power line carrier to the adaptability of variable load, increase low voltage power line carrier to noise
A kind of anti-interference ability, it would be desirable to the test side of low voltage power line carrier network and the laboratory simulation site environment of performance
Method, come to low voltage power line carrier network and performance carry out quantization property test, gradually improve carrier communication network
Robustness and the communication performance for improving carrier wave solve to imitate since load variation, noise jamming etc. communicate low voltage power line carrier
The influence problem of fruit.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above problems, provide a kind of analog site environment because
The laboratory test device and method of the low voltage power line carrier performance of element.
The technical scheme adopted by the invention is that: a kind of laboratory test device of low voltage power line carrier performance, it is special
Sign is: there is AC power source, computer, carrier test jig and carrier wave to wait for measurement fixture；
Wherein AC power source connects adjustable transformer input terminal through four circuit breakers, and adjustable transformer output end is through isolated location
Computer is connected by power supply line, adjustable transformer output end is also electrically connected carrier test jig through artificial mains network A；It is described
Adjustable transformer output end also connects carrier wave with artificial mains network B through isolated location and waits for measurement fixture；
The RF of the artificial mains network A connects the RF of artificial mains network B through adjustable attenuator with power divider；
Spectrum analyzer and signal generator are connected on the power divider；The power divider and artificial power net
Network B tie point connects oscillograph；
The adjustable transformer output end is separately connected the spectrum analyzer, the signal through isolated location and power supply line
Generator and the oscillograph；
The computer is communicated by connection and carrier test jig, oscillograph, spectrum analyzer and signal generator.
The carrier test jig includes test fixture and test carrier module.
The carrier wave waits for that measurement fixture includes ammeter and carrier module to be measured.
The isolated location is made of isolating transformer and filter.
The method tested using the laboratory test device of the low voltage power line carrier performance, it is characterised in that:
A, the receiving sensitivity, working frequency and transmission power of unidirectional carrier module are tested；
A1, four circuit breakers are disconnected；
A2, adjustable transformer is adjusted to instruction 220V；
A3, four circuit breakers of closure；
A4, adjustable attenuator is adjusted to 10dB；
Carrier performance test software on A5, starting computer, makes carrier test jig send data；
A6, spectrum analyzer capture corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph；If do not met, relevant device is checked, directly
Until meeting；
A7, starting carrier performance test software, make carrier test jig enter copy reading data pattern；
A8, adjustable attenuator is adjusted, until carrier performance test software can not receive the data that carrier wave waits for measurement fixture reply；
The numerical value of A9, the adjustable attenuator of record at this time, this value are then the carrier wave by the decaying of addition power divider
The receiving sensitivity of module；
A10, spectrum analyzer capture the transmission carrier spectrum that carrier wave waits for measurement fixture, and the working frequency of carrier module can be obtained
With transmission power；
B, the ratio of signal and noise is calculated；
B1, four circuit breakers are disconnected；
B2, adjustable transformer is adjusted to instruction 220V；
B3, four circuit breakers of closure；
B4, adjustable attenuator is adjusted to 10dB；
Carrier performance test software on B5, starting computer, makes carrier test jig send data；
B6, spectrum analyzer capture corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph, record corresponding carrier wave and send amplitude；Such as
Fruit does not meet, and relevant device is checked, until meeting；
B7, starting carrier performance test software, make carrier test jig enter copy reading data pattern；
B8, adjusting adjustable attenuator are 20dB；
Noise is imported into signal generator by computer, is injected by signal generator by B9, open signal generator
Into power divider；Adjust corresponding noise amplitude, until carrier performance test software Packet Error Ratio stablize in < 10%,
Present noise amplitude is recorded, corresponding signal-to-noise ratio is calculated.
The artificial mains network A is 50 Ω load impedances, and artificial mains network B is 50 Ω load impedances.
The artificial mains network A is 50 Ω load impedances, and artificial mains network B is 2 Ω load impedances.
The carrier wave waits for that measurement fixture is single phase power supply.
The carrier wave waits for that measurement fixture is three phase supply.
The noise is that noise is recorded at white Gaussian noise, sine wave, impulsive noise or oscillograph scene.
The beneficial effects of the present invention are: the present invention, which provides one kind, can simulate the external worlds such as field load impedance, live noise
The laboratory testing method of factor completes the test of the simulation site environment of low-voltage power carrier communication performance, thus quickly
The weak sport technique segment of the ability to communicate of located carriers, and improved.
Detailed description of the invention
Fig. 1 is the performance testing device overall structure diagram of embodiment mesolow power carrier communication.
Specific embodiment
As shown in Figure 1, the laboratory test device of the present embodiment mesolow power line carrier performance has four circuit breakers 1
A, adjustable transformer 1,1, computer, carrier test jig 1, artificial mains network 2 (artificial mains network A and B),
Isolated location 3, adjustable attenuator 1, power divider 1, signal generator 1, spectrum analyzer 1, oscillograph 1
A, carrier wave waits for measurement fixture 1.
AC power source connects adjustable transformer input terminal through four road disconnect switchs, and output end is connected with each isolated location,
AC power source is provided for system.Artificial mains network A and B are powered by an isolated location respectively, the RF of artificial mains network A
It is connected with adjustable attenuator, the RF of artificial mains network B is connected with power divider, and adjustable attenuator and power divider
It is connected, spectrum analyzer and signal generator is wherein connected on power divider, power divider is connect with artificial mains network B
Oscillograph is connect at point.Artificial mains network A and B are separately connected carrier test jig and carrier wave waits for measurement fixture.Computer passes through logical
It interrogates line and carrier test jig, oscillograph, signal generator, spectrum analyzer communicates.Spectrum analyzer, signal generator and show
Wave device connects isolated location through power supply line, is powered by isolated location.
Carrier test jig includes 1 test fixture and 1 test carrier module in the present embodiment；Artificial mains network A
It is 50 Ω or 2 Ω impedances for 50 Ω impedances, artificial mains network B；Isolated location includes 1 isolating transformer and 1 filter；
Carrier wave wait for measurement fixture include 1 ammeter and 1 carrier module to be measured.
Protection and switch electricity of four circuit breakers for system, guarantee when the excessive failure of electric current occurs in system in this example
Play the role of power-off protection.Adjustable transformer is used to adjust the supply voltage of system, test macro can be supported in 220V or
Steady operation under the operating voltage of 120V, since there are the operating voltage of 120V in foreign countries, so needing to simulate 120V power supply system
Test carrier communication performance.Computer operation voltage is in AC110V~AC240V, for installing the PC of carrier performance test macro
Software, by PC software control carrier test jig, the implementation of control performance test item, statistic property test item correlation
Data, export correlated performance analytical statement etc.；It also completes to lead oscillograph, signal generator, the control of spectrum analyzer, data
Out, waveform importing/export etc..Carrier test jig is used to complete
The host node of system, for carrying out data interaction with carrier module to be measured.Isolated location is made of isolating transformer and filter,
Buffer action is played, and filters out the high-frequency signal in power grid, the interference for introducing power grid is avoided and causes systematic quantification test not true
It is qualitative.Adjustable attenuator is used to adjust carrier test jig and carrier wave waits for the signal attenuation multiple between measurement fixture.Power divider
Input signal energy can be evenly distributed to multiple ports, between port and keep the isolation of height, used one in the system
Out two power divider and one go out three power divider.Oscillograph is used for the recording of low-voltage power line scene noise, and can
Amplitude, the waveform etc. of carrier signal are captured for analyzing.Signal generator, which is used to export, records or simulates scene
Noise jamming tests the anti-interference performance of carrier wave.Noise is divided into the waveform and letter for recording low voltage power line carrier operation scene
The noises such as white Gaussian noise, sine wave, the pulse of the simulation of number generator.Spectrum analyzer is used to capture frequency when carrier communication
Spectrum, analyzes its corresponding amplitude, frequency etc..Carrier wave waits for that measurement fixture includes ammeter and carrier wave module to be measured, the performance for carrier wave
Test.
The specific test method is as follows for the present embodiment:
S1, under 50 Ω load impedance simulated environments, the receiving sensitivity of single-phase carrier module；
S2, under simulated environment, the working frequency of single-phase carrier module；
S3, under 50 Ω load impedance simulated environments, the transmission power of single-phase carrier module:
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A and artificial mains network B is 50 Ω load impedances, is single-phase confession to measurement fixture
Electricity；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph；If do not met, relevant device is checked, directly
Until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9) adjustable attenuator, is adjusted, until carrier performance test software can not receive the data that carrier wave waits for measurement fixture reply；
10), the numerical value of the adjustable attenuator of record at this time, decaying of this value by addition power distribution, then be the carrier wave
The receiving sensitivity of module；
11), spectrum analyzer captures the transmission carrier spectrum that carrier wave waits for measurement fixture, can obtain the work frequency of carrier module
Rate and transmission power；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
S4, under 2 Ω load impedance simulated environments, the receiving sensitivity of single-phase carrier module；
S5, under 2 Ω load impedance simulated environments, the transmission power of single-phase carrier module:
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A is 50 Ω load impedances, and artificial mains network B is 2 Ω load impedances, to be measured to control
Tool is single phase power supply；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph；If do not met, relevant device is checked, directly
Until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9) adjustable attenuator, is adjusted, until carrier performance test software can not receive the data that carrier wave waits for measurement fixture reply；
10), the numerical value of the adjustable attenuator of record at this time, decaying of this value by addition power distribution, then be the carrier wave
The receiving sensitivity of module；
11), spectrum analyzer captures the transmission carrier spectrum that carrier wave waits for measurement fixture, can obtain the work frequency of carrier module
Rate and transmission power；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
S6,50 Ω load impedances and be added scene record noise situations Imitating environment under, single-phase carrier module
Signal-to-noise ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S7, in 50 Ω load impedances and when white Gaussian noise is added under simulated environment, the letter of single-phase carrier module
It makes an uproar ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S8, in 50 Ω load impedances and when sine wave is added under simulated environment, the noise of single-phase carrier module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S9, in 50 Ω load impedances and under impulse noise conditions Imitating environment is added, the noise of single-phase carrier module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise:
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A and artificial mains network B is 50 Ω load impedances, is single-phase confession to measurement fixture
Electricity；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph, record corresponding carrier wave and send amplitude；Such as
Fruit does not meet, and relevant device is checked, until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9), adjusting adjustable attenuator is 20dB；
10) oscillograph scene is recorded noise and imported into signal generator by computer, passed through by, open signal generator
Signal generator is injected into power divider；Corresponding noise amplitude is adjusted, until the Packet Error Ratio of carrier performance test software
Stablize in < 10%, records present noise amplitude, calculate corresponding signal-to-noise ratio；
11), according to above step, noise is successively changed to white Gaussian noise, sine wave, impulsive noise, and records phase
The noise amplitude answered calculates corresponding signal-to-noise ratio；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
S10,2 Ω load impedances and be added scene record noise situations Imitating environment under, single-phase carrier module
Signal-to-noise ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S11, in 2 Ω load impedances and when white Gaussian noise is added under simulated environment, the letter of single-phase carrier module
It makes an uproar ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S12, in 2 Ω load impedances and when existing sine wave is added under simulated environment, the noise of single-phase carrier module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S13, in 2 Ω load impedances and under impulse noise conditions Imitating environment is added, the noise of single-phase carrier module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A is 50 Ω load impedances, and artificial mains network B is 2 Ω load impedances, to be measured to control
Tool is single phase power supply；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph, record corresponding carrier wave and send amplitude；Such as
Fruit does not meet, and relevant device is checked, until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9), adjusting adjustable attenuator is 20dB；
10) oscillograph scene is recorded noise and imported into signal generator by computer, passed through by, open signal generator
Signal generator is injected into power divider；Corresponding noise amplitude is adjusted, until the Packet Error Ratio of carrier performance test software
Stablize in < 10%, records present noise amplitude, calculate corresponding signal-to-noise ratio；
11), according to above step, noise is successively changed to white Gaussian noise, sine wave, impulsive noise, and records phase
The noise amplitude answered calculates corresponding signal-to-noise ratio；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
S14, under 50 Ω load impedance simulated environments, the receiving sensitivity of Three Phase Carrier Based module；
S15, under simulated environment, the working frequency of Three Phase Carrier Based module；
S16, under 50 Ω load impedance simulated environments, the transmission power of Three Phase Carrier Based module:
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A and artificial mains network B is 50 Ω load impedances, is three-phase confession to measurement fixture
Electricity；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph；If do not met, relevant device is checked, directly
Until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9) adjustable attenuator, is adjusted, until carrier performance test software can not receive the data that carrier wave waits for measurement fixture reply；
10), the numerical value of the adjustable attenuator of record at this time, decaying of this value by addition power distribution, then be the carrier wave
The receiving sensitivity of module；
11), spectrum analyzer captures the transmission carrier spectrum that carrier wave waits for measurement fixture, can obtain the work frequency of carrier module
Rate and transmission power；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
S17, under 2 Ω load impedance simulated environments, the receiving sensitivity of Three Phase Carrier Based module；
S18, under 2 Ω load impedance simulated environments, the transmission power of Three Phase Carrier Based module；
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A is 50 Ω load impedances, and artificial mains network B is 2 Ω load impedances, to be measured to control
Tool is three phase supply；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph；If do not met, relevant device is checked, directly
Until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9) adjustable attenuator, is adjusted, until carrier performance test software can not receive the data that carrier wave waits for measurement fixture reply；
10), the numerical value of the adjustable attenuator of record at this time, decaying of this value by addition power distribution, then be the carrier wave
The receiving sensitivity of module；
11), spectrum analyzer captures the transmission carrier spectrum that carrier wave waits for measurement fixture, can obtain the work frequency of carrier module
Rate and transmission power；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
S19,50 Ω load impedances and be added scene record noise situations Imitating environment under, Three Phase Carrier Based module
Signal-to-noise ratio: the value be Packet Error Ratio < 10% in the case where, the ratio of signal and noise；
S20, in 50 Ω load impedances and when white Gaussian noise is added under simulated environment, Three Phase Carrier Based module
Signal-to-noise ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S21,2 Ω load impedances and be added scene record noise situations Imitating environment under, Three Phase Carrier Based module
Signal-to-noise ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S22, in 50 Ω load impedances and when sine wave is added under simulated environment, the noise of Three Phase Carrier Based module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S23, in 50 Ω load impedances and under impulse noise conditions Imitating environment is added, the letter of Three Phase Carrier Based module
It makes an uproar ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise:
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A and artificial mains network B is 50 Ω load impedances, is three-phase confession to measurement fixture
Electricity；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph, record corresponding carrier wave and send amplitude；Such as
Fruit does not meet, and relevant device is checked, until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9), adjusting adjustable attenuator is 20dB；
10) oscillograph scene is recorded noise and imported into signal generator by computer, passed through by, open signal generator
Signal generator is injected into power divider；Corresponding noise amplitude is adjusted, until the Packet Error Ratio of carrier performance test software
Stablize in < 10%, records present noise amplitude, calculate corresponding signal-to-noise ratio；
11), according to above step, noise is successively changed to white Gaussian noise, sine wave, impulsive noise, and records phase
The noise amplitude answered calculates corresponding signal-to-noise ratio.
S24, in 2 Ω load impedances and when white Gaussian noise is added under simulated environment, the letter of Three Phase Carrier Based module
It makes an uproar ratio: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S25, in 2 Ω load impedances and when existing sine wave is added under simulated environment, the noise of Three Phase Carrier Based module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise；
S26, in 2 Ω load impedances and under impulse noise conditions Imitating environment is added, the noise of Three Phase Carrier Based module
Than: in the case that the value is Packet Error Ratio < 10%, the ratio of signal and noise:
1) four circuit breakers, are disconnected；
2), wherein artificial mains network A is 50 Ω load impedances, and artificial mains network B is 2 Ω load impedances, to be measured to control
Tool is three phase supply；
3) adjustable transformer, is adjusted to instruction 220V；
4) four circuit breakers, are closed；
5) adjustable damping, is adjusted to 10dB；
6), start carrier performance test software, carrier test jig is made to send data；
7), spectrum analyzer captures corresponding frequency spectrum, and oscillograph captures corresponding waveform, analysis carrier test jig transmitting
Amplitude and waveform whether meet test condition, if met, remove oscillograph, record corresponding carrier wave and send amplitude；Such as
Fruit does not meet, and relevant device is checked, until meeting；
8), start carrier performance test software, carrier test jig is made to enter copy reading data pattern；
9), adjusting adjustable attenuator is 20dB；
10) oscillograph scene is recorded noise and imported into signal generator by computer, passed through by, open signal generator
Signal generator is injected into power divider；Corresponding noise amplitude is adjusted, until the Packet Error Ratio of carrier performance test software
Stablize in < 10%, records present noise amplitude, calculate corresponding signal-to-noise ratio；
11), according to above step, noise is successively changed to white Gaussian noise, sine wave, impulsive noise, and records phase
The noise amplitude answered calculates corresponding signal-to-noise ratio；
12), adjusting adjustable transformer to output voltage is 120V, is repeated the above steps.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, the art
Those of ordinary skill, within the scope of the invention, variation, addition or the replacement made all should belong to protection scope of the present invention.
Claims (9)
1. a kind of method that the laboratory test device of low voltage power line carrier performance is tested, it is characterised in that:
The laboratory test device of the low voltage power line carrier performance, have AC power source, computer, carrier test jig and
Carrier wave waits for measurement fixture；
Wherein AC power source connects adjustable transformer input terminal through four circuit breakers, and adjustable transformer output end passes through after isolated location
Power supply line connects computer, and adjustable transformer output end is also electrically connected carrier test jig through artificial mains network A；It is described adjustable
Transformer output end also connects carrier wave with artificial mains network B through isolated location and waits for measurement fixture；
The RF of the artificial mains network A connects the RF of artificial mains network B through adjustable attenuator with power divider；
Spectrum analyzer and signal generator are connected on the power divider；The power divider and artificial mains network B
Tie point connects oscillograph；
The adjustable transformer output end is separately connected the spectrum analyzer through isolated location and power supply line, the signal occurs
Device and the oscillograph；
The computer is communicated by connection and carrier test jig, oscillograph, spectrum analyzer and signal generator；
Test method includes:
A, the receiving sensitivity, working frequency and transmission power of unidirectional carrier module are tested；
A1, four circuit breakers are disconnected；
A2, adjustable transformer is adjusted to instruction 220V；
A3, four circuit breakers of closure；
A4, adjustable attenuator is adjusted to 10dB；
Carrier performance test software on A5, starting computer, makes carrier test jig send data；
A6, spectrum analyzer capture corresponding frequency spectrum, and oscillograph captures corresponding waveform, the width of analysis carrier test jig transmitting
Whether degree and waveform meet test condition, if met, remove oscillograph；If do not met, relevant device, Zhi Daofu are checked
It is combined into only；
A7, starting carrier performance test software, make carrier test jig enter copy reading data pattern；
A8, adjustable attenuator is adjusted, until carrier performance test software can not receive the data that carrier wave waits for measurement fixture reply；
The numerical value of A9, the adjustable attenuator of record at this time, this value are then the carrier module by the decaying of addition power divider
Receiving sensitivity；
A10, spectrum analyzer capture the transmission carrier spectrum that carrier wave waits for measurement fixture, and the working frequency and hair of carrier module can be obtained
Send power；
B, the ratio of signal and noise is calculated；
B1, four circuit breakers are disconnected；
B2, adjustable transformer is adjusted to instruction 220V；
B3, four circuit breakers of closure；
B4, adjustable attenuator is adjusted to 10dB；
Carrier performance test software on B5, starting computer, makes carrier test jig send data；
B6, spectrum analyzer capture corresponding frequency spectrum, and oscillograph captures corresponding waveform, the width of analysis carrier test jig transmitting
Whether degree and waveform meet test condition, if met, remove oscillograph, record corresponding carrier wave and send amplitude；If no
Meet, relevant device is checked, until meeting；
B7, starting carrier performance test software, make carrier test jig enter copy reading data pattern；
B8, adjusting adjustable attenuator are 20dB；
Noise is imported into signal generator by computer, is injected into function by signal generator by B9, open signal generator
In rate distributor；Adjust corresponding noise amplitude, until carrier performance test software Packet Error Ratio stablize in < 10%, record
Present noise amplitude calculates corresponding signal-to-noise ratio.
2. according to the method described in claim 1, it is characterized by: the artificial mains network A is 50 Ω load impedances, manually
Electric power network B is 50 Ω load impedances.
3. according to the method described in claim 1, it is characterized by: the artificial mains network A is 50 Ω load impedances, manually
Electric power network B is 2 Ω load impedances.
4. according to the method in claim 2 or 3, it is characterised in that: the carrier wave waits for that measurement fixture is single phase power supply.
5. according to the method in claim 2 or 3, it is characterised in that: the carrier wave waits for that measurement fixture is three phase supply.
6. according to the method described in claim 1, it is characterized by: the noise is white Gaussian noise, sine wave, impulsive noise
Or noise is recorded at oscillograph scene.
7. according to the method described in claim 1, it is characterized by: the carrier test jig includes that test fixture and test carry
Wave module.
8. according to the method described in claim 1, it is characterized by: the carrier wave waits for that measurement fixture includes ammeter and carrier wave mould to be measured
Block.
9. according to the method described in claim 1, it is characterized by: the isolated location is by isolating transformer and filter group
At.
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| CN108631819A (en) * | 2017-03-15 | 2018-10-09 | 国网四川省电力公司电力科学研究院 | Power line carrier noise jamming tests system and test method |
| CN108964703B (en) * | 2017-05-18 | 2023-10-20 | 芯迪半导体科技（上海）有限公司 | Testing device of power line carrier communication equipment |
| CN107919928A (en) * | 2017-12-20 | 2018-04-17 | 国网江苏省电力有限公司电力科学研究院 | A kind of carrier signal test device and test method |
| CN108768451B (en) * | 2018-04-28 | 2021-07-20 | 华立科技股份有限公司 | Power line carrier integrated test system and test method |
| CN110581720B (en) * | 2019-09-04 | 2021-05-18 | 武汉长光科技有限公司 | Testing device, system and testing method for converting G.hn PLC power line into coaxial line |
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