CN105911513A - System for testing immunity of intelligent ammeter to radio frequency conducted disturbance - Google Patents
System for testing immunity of intelligent ammeter to radio frequency conducted disturbance Download PDFInfo
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- CN105911513A CN105911513A CN201610443667.8A CN201610443667A CN105911513A CN 105911513 A CN105911513 A CN 105911513A CN 201610443667 A CN201610443667 A CN 201610443667A CN 105911513 A CN105911513 A CN 105911513A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
A system for testing immunity of an intelligent ammeter to radio frequency conducted disturbance is disclosed and comprise a standard source, a standard ammeter, a decoupling impedance Z, an electric current generator and an ammeter being tested. A three phase voltage output end of the standard source is connected with a corresponding voltage terminal of the ammeter being tested, and a one phase voltage output end of the standard source is connected with a corresponding voltage terminal of the standard ammeter; after being connected with the standard ammeter in series, one end of a one phase output current of the standard source is connected with the decoupling impedance Z in series and connected with one end L of a current terminal, of a corresponding phase position, of the ammeter being tested; the other end of the one phase output current of the standard source is directly connected with the other end L' of the current terminal L, of the corresponding phase position, of the ammeter being tested; one end of an output end of the electric current generator is connected with the one end L of the current terminal, of the corresponding phase position, of the ammeter being tested while the other end of the output end of the electric current generator is connected with the other end L' of the current terminal, of the corresponding phase position, of the ammeter being tested. The invention provides the system for testing immunity of the intelligent ammeter to radio frequency conducted disturbance, the system is used for testing immunity of the intelligent ammeter to symmetric current conducted disturbance, wherein a symmetric current ranges from 2kHz to 150 kHz in frequency.
Description
Technical field
The present invention relates to a kind of intelligent electric meter Conducted Radio Frequency disturbance jamming immunity test system, belong to Electric Energy Metering Technology field.
Background technology
In recent years, China's intelligent grid has been enter into the all-round construction stage.Along with the fast development of intelligent grid, intelligence electric energy
Table, as the important component part of intelligent grid, is extensively applied, and its metering accuracy and operational reliability will directly affect
Economic interests between electric company and electricity consumption user.Therefore, State Grid Corporation of China has worked out a series of company standard, to intelligence
Electric energy meter proposes requirement, to ensure the accurate metering of electric energy.
Existing relevant criterion and technological document, such as: state's net company standard Q/GDW 1354, IEC 17215 standard, IR46
International recommendation and EN 50470 standard etc., according to IEC6100-4 and GB/17626 electromagnetic compatibility series standard, exist to intelligent electric meter
Conducted Radio Frequency Immunity method of testing and device in 150kHz-80MHz frequency range have been proposed accordingly requirement, to frequency
Scope is that the conduction interference of 2kHz-150kHz does not does requirement.But, along with making widely of photovoltaic DC-to-AC converter and Switching Power Supply
With, consequent frequency range is that 2kHz-150kHz symmetrical current can carry out conduction interference to electric energy meter, at present, lacks phase
The intelligent electric meter Conducted Radio Frequency disturbance jamming immunity test system answered, it is impossible to carry out corresponding test to evaluate electric energy meter to its anti-interference
Degree ability.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art, it is provided that a kind of intelligent electric meter Conducted Radio Frequency harassing and wrecking are anti-
Degree of disturbing test system, for carrying out intelligent electric energy meter resisting under frequency range is 2kHz-150kHz symmetrical current conduction interference
Degree of disturbing is tested.
In order to solve above-mentioned technical problem, the present invention is to be achieved through the following technical solutions:
A kind of intelligent electric meter Conducted Radio Frequency disturbance jamming immunity test system, including: standard source, standard scale, decoupling impedance Z, electric current
Generator and tested table.The three-phase voltage outfan of standard source is connected with the corresponding voltage terminal of tested table, the one of standard source
Phase voltage outfan is connected with the corresponding voltage terminal of standard scale, for tested table and standard scale voltage circuit provide test time
Required 50Hz standard sine voltage；After one phase output electric current of standard source and standard scale series connection, then connect also with decoupling impedance Z
Being connected with the corresponding phase current terminal L of tested table, a phase output direct and tested table of the electric current other end of standard source is corresponding
Phase current terminal other end L＇It is connected, for 50Hz standard required when standard scale and the offer test of tested table current circuit just
String electric current；One end of current feedback circuit outfan is connected with tested table corresponding phase current terminal L, and the other end then accesses tested
Table corresponding phase current terminal other end L＇, the current circuit for tested table provides the frequency range needed for test to be 2kHz-
The electric current harassing and wrecking signal of 150kHz；The effect of decoupling impedance Z is to avoid this harassing and wrecking signal to enter standard source, and then affects power frequency letter
Number generation.
Described current feedback circuit, including: signal generator, amplifier, decoupling impedance Z＇, current transformer, modulate circuit
And DSP；The output of signal generator and amplifier connect, by the frequency range that signal generator produces be 2kHz-150kHz just
String small area analysis signal exports after amplifying；One end of amplifier is through decoupling impedance Z＇It is connected with the current terminal L of tested table, decoupling resistance
Impedance Z＇Power current entering signal generator can be prevented；The other end of amplifier is through the input of current transformer primary side and tested table
Current terminal L＇Being connected, such frequency range is that the sinusoidal current harassing and wrecking signal of 2kHz-150kHz will flow through tested table
Current circuit；The secondary side of current transformer exports conditioned circuit and is connected with the analog input of DSP；The output of DSP and letter
Number generator input connects；The electric current that frequency is 2kHz-150kHz after current transformer detection is amplified harasses signal, passes through
Modulate circuit becomes the treatable analog voltage signal of DSP, and DSP, by processing this voltage signal, obtains electric current harassing and wrecking signal
Amplitude, and carry out judging that also control signal generator improves or reduces the amplitude of signal according to the value set, until actual output
Signal amplitude and setting value approximately equal.
The step that tested table is tested by the present invention is as follows:
(1) test is started；
(2) standard source is started, the sinusoidal voltage of output 50Hz and electric current；
(3) frequency and the amplitude of harassing and wrecking signal are set；
(4) signal generator output sinusoidal current harassing and wrecking signal；
(5) amplitude of the electric current harassing and wrecking signal of output is detected by current transformer；
(6) if the amplitude of electric current harassing and wrecking signal and setting value are close, meet requirement, then enter step (7)；As being unsatisfactory for requirement
Then by dsp control signal generator, the amplitude of signal is adjusted；
(7) test period t of the harassing and wrecking resident setting of signal exported；
(8) read at the trial between electric energy meter error after t；
(9) signal generator stops output harassing and wrecking signal, and current amplitude gradually reduces to 0；
(10) according to step delta f set, reset harassing and wrecking signal frequency and amplitude, repeat step (4) to step (9)；
(11) the harassing and wrecking signal immunity to interference test of tested table 2kHz-150kHz electric current is completed.
Compared with prior art, the invention has the beneficial effects as follows: the invention provides a kind of intelligent electric meter Conducted Radio Frequency and disturb
Disturb immunity test system, be used for carrying out intelligent electric energy meter under frequency range is 2kHz-150kHz symmetrical current conduction interference
Immunity to interference test.
Accompanying drawing explanation
Fig. 1 is the test system schematic of the present invention；
Fig. 2 is current generator configuration schematic diagram of the present invention；
Fig. 3 is the test flow chart of the present invention.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings:
It it is the test system schematic of the embodiment of the present invention shown in Fig. 1.
The present embodiment one intelligent electric energy meter Conducted Radio Frequency disturbance jamming immunity test device, including: standard source, standard scale,
Decoupling impedance, current feedback circuit and tested table.During test, first turning on standard source, now the voltage output end of standard source will
There is provided the 50Hz sinusoidal voltage of standard to the voltage circuit of standard scale and tested table, its amplitude can be carried out according to the specification of tested table
Adjust；The electric current output of standard source provides the 50Hz sinusoidal current of standard will to the current circuit of standard scale and tested table, its
Amplitude can be adjusted according to the specification of tested table and testing requirement；Then, in current feedback circuit, set the width of harassing and wrecking signal
Value and frequency, the amplitude of electric current starts to raise from 0, until amplitude and the setting value approximately equal of harassing and wrecking signal being detected.Now,
Owing to the voltage circuit of standard scale and tested table is in parallel, and current circuit is series connection, therefore can pass through standard scale and quilt
Error between inspection table, reads relative error, special with detection metering of tested table under this amplitude and specific and frequency current are harassed
Property.Further, decoupling impedance Z can avoid this radio environment signal to enter standard source, and then affects the accurate of test.Then will harassing and wrecking
The amplitude of signal gradually decreases to 0, according to the step-length set, reset the frequency of electric current harassing and wrecking signal, rise the width of electric current
Value, repeat the above steps, complete the electric current harassing and wrecking signal immunity to interference test of 2kHz-150kHz.
It it is the structural representation of the current feedback circuit of the present embodiment shown in Fig. 2.
The current feedback circuit of the present embodiment, including: signal generator, amplifier, decoupling impedance Z＇, current transformer, conditioning
Circuit and DSP.During test, DSP is utilized to set frequency and amplitude, the signal of the electric current harassing and wrecking signal that signal generator will produce
The output of generator and amplifier connect, the sinusoidal small area analysis that frequency range the is 2kHz-150kHz letter produced by signal generator
Number amplify after export；One end of amplifier is through decoupling impedance Z＇It is connected with the current terminal L of tested table, decoupling impedance Z＇Can prevent
Power current entering signal generator；The other end of amplifier is through the input of current transformer primary side and the current terminal L of tested table＇
Being connected, such frequency range is that the sinusoidal current harassing and wrecking signal of 2kHz-150kHz will flow through the current circuit of tested table；Electric current
The secondary side of transformer exports conditioned circuit and is connected with the analog input of DSP；The output of DSP and signal generator input
Connect；The electric current that frequency is 2kHz-150kHz after current transformer detection is amplified harasses signal, becomes through modulate circuit
The treatable analog voltage signal of DSP, DSP, by processing this voltage signal, obtains the amplitude of electric current harassing and wrecking signal, and according to setting
Fixed value carries out judging and control signal generator improves or reduces the amplitude of signal, until the signal amplitude of actual output and setting
Definite value approximately equal, the electric current harassing and wrecking signal of the most exportable needs, when needs change electric current harassing and wrecking signal, can be by DSP weight
Frequency and the amplitude of electric current harassing and wrecking signal are newly set, it should be noted that before resetting, the electric current of last time need to be harassed letter
Number amplitude reduces to 0, then repeats above-mentioned process, then the electric current of new frequency is harassed signal amplitude is raised to setting value.
The testing process of the present embodiment is as it is shown on figure 3, concrete testing procedure is as follows:
Step 1: start test；
Step 2: start standard source, the sinusoidal voltage of output 50Hz and electric current；
Step 3: set frequency and the amplitude of harassing and wrecking signal；
Step 4: signal generator output sinusoidal current harassing and wrecking signal；
Step 5: the amplitude of the electric current harassing and wrecking signal of output is detected by current transformer；
Step 6: if the amplitude of electric current harassing and wrecking signal and setting value are close, meet requirement, then enter step 7；As being unsatisfactory for wanting
Ask then by dsp control signal generator, the amplitude of signal is adjusted；
Step 7: test period t of the harassing and wrecking resident setting of signal of output；
Step 8: electric energy meter error after t between reading at the trial；
Step 9: signal generator stops output harassing and wrecking signal, and current amplitude gradually reduces to 0；
Step 10: according to step delta f set, resets harassing and wrecking signal frequency and amplitude, repeats step 4 to step 9；
Step 11: complete the harassing and wrecking signal immunity to interference test of tested table 2kHz-150kHz electric current.
Claims (3)
1. an intelligent electric meter Conducted Radio Frequency disturbance jamming immunity test system, it is characterised in that described system includes standard source, mark
Quasi-table, decoupling impedance Z, current feedback circuit and tested table；The three-phase voltage outfan of standard source and the corresponding voltage end of tested table
Son is connected, and a phase voltage outfan of standard source is connected with the corresponding voltage terminal of standard scale, for tested table and standard scale
Voltage circuit required 50Hz standard sine voltage time test is provided；One phase output electric current of standard source and standard scale series connection
After, then connect with decoupling impedance Z and be connected with the corresponding phase current terminal L of tested table, a phase output electric current of standard source
Direct and the tested table corresponding phase current terminal other end L of the other end＇It is connected, provides for standard scale and tested table current circuit
50Hz standard sine electric current required during test；One end of current feedback circuit outfan and tested table corresponding phase current terminal phase
Connecting L, the other end then accesses tested table corresponding phase current terminal other end L＇, the current circuit for tested table provides test institute
The electric current that frequency range the is 2kHz-150kHz harassing and wrecking signal needed；The effect of decoupling impedance Z is to avoid this harassing and wrecking signal to enter mark
Quasi-source, and then affect the generation of power frequency component.
A kind of intelligent electric meter Conducted Radio Frequency disturbance jamming immunity test system, it is characterised in that described
Current feedback circuit includes: signal generator, amplifier, decoupling impedance Z＇, current transformer, modulate circuit and DSP；Signal generator
Output and amplifier connect, by signal generator produce the sinusoidal small area analysis signal that frequency range is 2kHz-150kHz amplify
Rear output；One end of amplifier is through decoupling impedance Z＇It is connected with the current terminal L of tested table, decoupling resistance impedance Z＇Power frequency can be prevented
Electric current entering signal generator；The other end of amplifier is through the input of current transformer primary side and the current terminal L of tested table＇It is connected
Connecing, such frequency range is that the sinusoidal current harassing and wrecking signal of 2kHz-150kHz will flow through the current circuit of tested table；Current Mutual Inductance
The secondary side of device exports conditioned circuit and is connected with the analog input of DSP；The output of DSP is with signal generator input even
Connect；The electric current that frequency is 2kHz-150kHz after current transformer detection is amplified harasses signal, becomes DSP through modulate circuit
Treatable analog voltage signal, DSP, by processing this voltage signal, obtains the amplitude of electric current harassing and wrecking signal, and according to setting
Value carry out judging and control signal generator improves or reduces the amplitude of signal, until the signal amplitude of actual output and setting
Value approximately equal.
A kind of intelligent electric meter Conducted Radio Frequency disturbance jamming immunity test system, it is characterised in that described
System is as follows to the testing procedure of tested table:
(1) test is started；
(2) standard source is started, the sinusoidal voltage of output 50Hz and electric current；
(3) frequency and the amplitude of harassing and wrecking signal are set；
(4) signal generator output sinusoidal current harassing and wrecking signal；
(3) amplitude of the electric current harassing and wrecking signal of output is detected by current transformer；
(6) if the amplitude of electric current harassing and wrecking signal and setting value are close, meet requirement, then enter step (7)；As being unsatisfactory for requirement
Then by dsp control signal generator, the amplitude of signal is adjusted；
(7) test period t of the harassing and wrecking resident setting of signal exported；
(8) read at the trial between electric energy meter error after t；
(9) signal generator stops output harassing and wrecking signal, and current amplitude gradually reduces to 0；
(10) according to step delta f set, reset harassing and wrecking signal frequency and amplitude, repeat step (4) to step (9)；
(11) the harassing and wrecking signal immunity to interference test of tested table 2kHz-150kHz electric current is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610443667.8A CN105911513A (en) | 2016-06-20 | 2016-06-20 | System for testing immunity of intelligent ammeter to radio frequency conducted disturbance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610443667.8A CN105911513A (en) | 2016-06-20 | 2016-06-20 | System for testing immunity of intelligent ammeter to radio frequency conducted disturbance |
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| CN105911513A true CN105911513A (en) | 2016-08-31 |
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| CN201610443667.8A Pending CN105911513A (en) | 2016-06-20 | 2016-06-20 | System for testing immunity of intelligent ammeter to radio frequency conducted disturbance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594158A (en) * | 2018-02-09 | 2018-09-28 | 浙江迅驰科技有限公司 | DM EMI experimental rig and method |
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| CN205898997U (en) * | 2016-06-20 | 2017-01-18 | 国网江西省电力科学研究院 | Smart electric meter radio frequency conducted disturbance noise immunity test system |
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Patent Citations (7)
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| CN101183147A (en) * | 2007-12-21 | 2008-05-21 | 上海联能仪表有限公司 | Precision testing system of electrical energy meter electricity quick transient impulse group interference test |
| CN101982792A (en) * | 2010-09-29 | 2011-03-02 | 南京航空航天大学 | Test system and method for measurement error and EMS frequency automatic matching of intelligent electric energy meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594158A (en) * | 2018-02-09 | 2018-09-28 | 浙江迅驰科技有限公司 | DM EMI experimental rig and method |
| CN108594158B (en) * | 2018-02-09 | 2023-09-29 | 浙江迅驰科技有限公司 | Differential mode interference test device and method |
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