CN203554465U - Simulation platform of power consumption information acquisition system - Google Patents

Abstract

The utility model discloses a simulation platform of a power consumption information acquisition system, which comprises a voltage level regulator, a concentrator, a carrier line length simulator, a carrier decay simulator, a carrier interference simulator, an RS485 line length simulator, an RS485 interference simulator, an Ethernet and serial port converter, an electric energy meter simulator, and a parameter configuration and simulation result output device. According to the simulation platform of a power consumption information acquisition system, the problems that the efficiency is low and the test results are not accurate when indoor test is carried out on acquisition equipment, and the test efficiency of the acquisition equipment and the accuracy of the test results can be improved.

Description

The emulation platform of power information acquisition system

Technical field

The utility model relates to the communications field, in particular to a kind of emulation platform of power information acquisition system.

Background technology

The construction of power information acquisition system is the important component part that strong intelligent grid is built, and is the basis of improving company management's standardization, informationization, modernization level.Realize the collection of residential customers electric weight, collecting device just must be installed.And the quality of collecting device quality and the height of detection efficiency will directly affect the operation stability of collecting device, the copy reading success rate of power information and the construction progress of acquisition system.

In correlation technique, the residential customers power information collection of nationwide mainly adopts concentrator to realize, and concentrator is by up channel and the master station communication of checking meter, by the various table meters of carry below down channel copy reading.Fig. 1 is the acquisition system basic network topological structure schematic diagram according to correlation technique, as shown in Figure 1, the uplink transmission mode of concentrator is mainly selected optical fiber private network, GPRS (General Packet Radio Service at present, referred to as GPRS)/code division multiple access access (Code Division Multiple Access, referred to as CDMA)/3-G (Generation Three mobile communication system) (The Third Generation, referred to as 3G) wireless public network; Downlink transmission mode mainly adopts the modes such as RS485 communication, power line carrier, micropower wireless network.

Two kinds of topological structures in acquisition system shown in Fig. 1, have been adopted, respectively shown in Fig. 2 and Fig. 3: " main website+concentrator+collector+electric energy meter " and " main website+concentrator+electric energy meter mode ", wherein, up channel between concentrator and main website is GPRS/CDMA wireless public network, between concentrator and collector or electric energy meter, by power line, transmit data, between collector and electric energy meter, by Shielded Twisted Pair, transmit data.

Inventor finds in research process, because power information acquisition system is built at the early-stage, in power grid enterprises' standard, the partial function of collecting device, stipulations and technical indicator are not rigorous, manufacturer understands different, and the mechanism of checking meter of different carrier chip producer is also different, under existing indoor test environment, to the test of concentrator, be only whether up to standard by measuring its technical indicator, but because indoor test environment exists idealized, even therefore by the concentrator of indoor test, also cannot guarantee its performance in actual applications.And, when being tested, need to each index, test respectively one by one by concentrator, also there is the problem that testing efficiency is low.

For collecting device being carried out in correlation technique, the efficiency of indoor test existence is low, the inaccurate problem of test result, not yet proposes at present effective solution.

Utility model content

The utility model provides a kind of emulation platform of power information acquisition system, at least to solve, collecting device is carried out to the efficiency that indoor test exists is low, the inaccurate problem of test result.

According to an aspect of the present utility model, a kind of emulation platform of power information acquisition system is provided, comprise: electric pressure adjuster, concentrator, carrier line length simulator, carrier wave reduction emulator, carrier-in-interference simulator, RS485 line length simulator, RS485 interference simulation device, Ethernet and serial converter, electric energy meter simulator, parameter configuration and simulation result follower, wherein: described electric pressure adjuster, described concentrator, described RS485 line length simulator, described RS485 interference simulation device, described Ethernet and serial converter, described parameter configuration and simulation result follower connect successively, described electric pressure adjuster, described carrier line length simulator, described carrier wave reduction emulator, described Ethernet are connected successively with serial converter, described carrier-in-interference simulator is connected with the input of described carrier wave reduction emulator.

Preferably, described platform also comprises: low-voltage power line isolation pressurizer, be connected with described electric pressure adjuster, and be used to described emulation platform that power supply is provided, and the power supply of external power source and described emulation platform is isolated.

Preferably, described electric pressure adjuster, for adjusting the electric pressure of the described emulation platform of input, wherein, the scope of described electric pressure comprises: exchange 264 volts of 176 volts～interchanges.

Preferably, described concentrator, for gathering user's power information, and offers described emulation platform by the power information of collection and carries out emulation transmission.

Preferably, described carrier line length simulator, the impact for emulation different carrier line length on the signal of telecommunication on carrier line, wherein, it is one of following that described different carrier line length comprises: 1 meter, 500 meters, 1000 meters, 1500 meters, 2000 meters.

Preferably, described RS485 line length simulator, impact for the different RS485 communication line of emulation length on the signal of telecommunication on RS485 communication line, wherein, it is one of following that described different RS485 communication line length comprises: 1 meter, 500 meters, 1000 meters, 1500 meters, 2000 meters.

Preferably, described carrier wave reduction emulator, by carrier channel, detecting module is connected with described Ethernet and serial converter, for the specified pad value of emulation different carrier chip, wherein, the specified pad value of described different carrier chip comprises one of following: 0 decibel, 25 decibels, 50 decibels, 75 decibels, 100 decibels.

Preferably, described carrier-in-interference simulator and described RS485 interference simulation device, for generation of the interference signal of predetermined waveform, the interference signal of wherein said predetermined waveform is for the following interference one of at least of emulation: additive property white Gaussian noise, periodically disturb, time constant continuous interference and the random bursty interference producing.

Preferably, described parameter configuration and simulation result follower are also connected with described electric pressure adjuster, described carrier line length simulator, described carrier wave reduction emulator, described carrier-in-interference simulator, described RS485 line length simulator, described RS485 interference simulation device, described electric energy meter simulator respectively.

Preferably, described parameter configuration and simulation result follower comprise: configuration parameter input unit, for inputting the configuration parameter for configuring above-mentioned each simulator; Simulation result output unit, for showing the simulation result of above-mentioned each simulator.

Pass through the utility model, adopt electric pressure adjuster, concentrator, carrier line length simulator, carrier wave reduction emulator, carrier-in-interference simulator, RS485 line length simulator, RS485 interference simulation device, Ethernet and serial converter, electric energy meter simulator, parameter configuration and simulation result follower to build the mode of emulation platform, solved and collecting device has been carried out to the efficiency of indoor test existence is low, the inaccurate problem of test result, improved the efficiency of collecting device test and the accuracy of test result.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the acquisition system basic network topological structure schematic diagram according to correlation technique;

Fig. 2 is the topological structure schematic diagram according to a kind of acquisition system of correlation technique;

Fig. 3 is the topological structure schematic diagram according to the another kind of acquisition system of correlation technique;

Fig. 4 is according to the structural representation of the emulation platform of the power information acquisition system of the utility model embodiment;

Fig. 5 is according to the preferred structure schematic diagram of the emulation platform of the power information acquisition system of the utility model embodiment;

Fig. 6 is according to the preferred structure schematic diagram of the parameter configuration of the utility model embodiment and simulation result follower 420;

Fig. 7 is the acquisition system simplified structure schematic diagram according to the utility model preferred embodiment;

Fig. 8 is according to the structural representation of the collecting device detection platform of the utility model embodiment;

Fig. 9 is the schematic diagram of the parameter configuration interface of the concentrator that provides according to the detection main website of the utility model preferred embodiment;

Figure 10 is according to the schematic diagram of the parameter configuration display interface of concentrator in the detection main website of the utility model preferred embodiment;

Figure 11 is according to the schematic diagram of the parameter configuration display interface of the detection main website power source voltage influence module of the utility model preferred embodiment;

Figure 12 is according to the schematic diagram of the parameter configuration display interface of carrier line length emulation module in the detection main website of the utility model preferred embodiment;

Figure 13 is the schematic diagram of uploading the parameter configuration display interface of wave attenuation emulation module according to the detection main website of the utility model preferred embodiment;

Figure 14 is according to the schematic diagram of the parameter configuration display interface of carrier-in-interference emulation module in the detection main website of the utility model preferred embodiment;

Figure 15 is according to the schematic diagram of the parameter configuration display interface of RS845 line length emulation module in the detection main website of the utility model preferred embodiment;

Figure 16 is according to the schematic diagram of the parameter configuration display interface of multiple emulation modules in the detection main website of the utility model preferred embodiment;

Figure 17 is according to the schematic diagram of the display interface of the full-automatic detected parameters configuration of the utility model preferred embodiment;

Figure 18 is according to the schematic diagram of the display interface of the full-automatic testing process of the utility model preferred embodiment;

Figure 19 is according to the schematic diagram of the test report generating in the detection main website of the utility model preferred embodiment;

Figure 20 is according to the schematic diagram of the line length circuit model of the utility model preferred embodiment;

Figure 21 is according to the schematic diagram of the attenuator principle of the utility model preferred embodiment.

Embodiment

It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.

The present embodiment provides a kind of emulation platform of power information acquisition system, Fig. 4 is according to the structural representation of the emulation platform of the power information acquisition system of the utility model embodiment, as shown in Figure 4, this platform comprises: electric pressure adjuster 402, concentrator 404, carrier line length simulator 406, carrier wave reduction emulator 408, carrier-in-interference simulator 410, RS485 line length simulator 412, RS485 interference simulation device 414, Ethernet and serial converter 416, electric energy meter simulator 418, parameter configuration and simulation result follower 420, wherein:

Electric pressure adjuster 402, concentrator 404, RS485 line length simulator 412, RS485 interference simulation device 414, Ethernet and serial converter 416, parameter configuration and simulation result follower 420 are connected successively;

Electric pressure adjuster 402, carrier line length simulator 406, carrier wave reduction emulator 408, Ethernet are connected successively with serial converter 416;

Carrier-in-interference simulator 410 is connected with the input of carrier wave reduction emulator 408.

By above-mentioned platform, adopt electric pressure adjuster 402, carrier line length simulator 406, carrier wave reduction emulator 408, carrier-in-interference simulator 410, RS485 line length simulator 412, RS485 interference simulation device 414, Ethernet and serial converter 416, electric energy meter simulator 418, parameter configuration and simulation result follower 420 artificial actual scenes to carry out emulation testing to concentrator 404, make test result more approach the test result under practical application scene, improved the accuracy of test result; Owing to being the test that scene that is virtually reality like reality is carried out, in test process, realized the test to concentrator 404 all parameters simultaneously, thereby promoted the efficiency of test.And, for the concentrator 404 of different manufacturers production, adopt this platform by identical parameter configuration, to make test result objective and fair.

Module, unit involved in embodiment of the present utility model can be realized by the mode of software, also can realize by the mode of hardware.Described module, unit in the present embodiment also can be arranged in processor, for example, can be described as: a kind of processor comprises electric pressure adjuster 402, concentrator 404, carrier line length simulator 406, carrier wave reduction emulator 408, carrier-in-interference simulator 410, RS485 line length simulator 412, RS485 interference simulation device 414, Ethernet and serial converter 416, electric energy meter simulator 418, parameter configuration and simulation result follower 420.

Fig. 5 is according to the preferred structure schematic diagram of the emulation platform of the power information acquisition system of the utility model embodiment, as shown in Figure 5, preferably, this platform also comprises: low-voltage power line isolation pressurizer 502, be connected with electric pressure adjuster 402, be used to emulation platform that power supply is provided, and the power supply of external power source and emulation platform is isolated.

Preferably, electric pressure adjuster 402, for adjusting the electric pressure of input emulation platform, wherein, the scope of electric pressure comprises: exchange 264 volts of 176 volts～interchanges.

Preferably, concentrator 404, for gathering user's power information, and offers emulation platform by the power information of collection and carries out emulation transmission.

Preferably, carrier line length simulator 406, the impact for emulation different carrier line length on the signal of telecommunication on carrier line, wherein, it is one of following that different carrier line length comprises: 1 meter, 500 meters, 1000 meters, 1500 meters, 2000 meters.

Preferably, RS485 line length simulator 412, impact for the different RS485 communication line of emulation length on the signal of telecommunication on RS485 communication line, wherein, it is one of following that different RS485 communication line length comprises: 1 meter, 500 meters, 1000 meters, 1500 meters, 2000 meters.

Preferably, carrier wave reduction emulator 408, by carrier channel, detecting module is connected with Ethernet and serial converter 416, for the specified pad value of emulation different carrier chip, wherein, the specified pad value of different carrier chip comprises one of following: 0 decibel, 25 decibels, 50 decibels, 75 decibels, 100 decibels.

Preferably, carrier-in-interference simulator 410 and RS485 interference simulation device 414, for generation of the interference signal of predetermined waveform, wherein the interference signal of predetermined waveform is for the following interference one of at least of emulation: additive property white Gaussian noise, periodically disturb, time constant continuous interference and the random bursty interference producing.

Preferably, parameter configuration and simulation result follower 420 are also connected with electric pressure adjuster 402, carrier line length simulator 406, carrier wave reduction emulator 408, carrier-in-interference simulator 410, RS485 line length simulator 412, RS485 interference simulation device 414, electric energy meter simulator 418 respectively.

Fig. 6 is according to the preferred structure schematic diagram of the parameter configuration of the utility model embodiment and simulation result follower 420, as shown in Figure 6, preferably, parameter configuration and simulation result follower 420 comprise: configuration parameter input unit 422, for inputting the configuration parameter for configuring above-mentioned each simulator; Simulation result output unit 424, for showing the simulation result of above-mentioned each simulator.

Below in conjunction with preferred embodiment, be described and illustrate.

For analog acquisition running operating mode, in this preferred embodiment, the practical application scene of the collecting device in correlation technique is analyzed, simplified, a kind of acquisition system simplified structure has been proposed, as shown in Figure 7.

In this preferred embodiment, adopt respectively power line, Shielded Twisted Pair and electric energy meter communication, and respectively to concentrator by the performance of carrier communication, evaluate by the performance of RS485 communication.

According to the acquisition system shown in Fig. 7, simplify basic structure and carry out the design of collecting device detection platform, the collecting device detection platform in this preferred embodiment is built overall employing modularized design, can be comprised of software and hardware two parts.

Wherein, software section can be comprised of detection Master Station Software (being equivalent to parameter configuration and simulation result follower 420), virtual electric energy meter (being equivalent to electric energy meter simulator 418);

Hardware components can be by forming with lower module: mains voltage variations affects module (being equivalent to electric pressure adjuster 402); Carrier line length emulation module (being equivalent to carrier line length simulator 406); Carrier wave decay emulation module (being equivalent to carrier wave reduction emulator 408); Carrier-in-interference emulation module (being equivalent to carrier-in-interference simulator 410); RS485 line length emulation module (being equivalent to RS485 line length simulator 412); RS485 line-hit emulation module (being equivalent to RS485 interference simulation device 414); Low-voltage power line xegregating unit (being equivalent to low-voltage power line isolation pressurizer 502); Ethernet and serial ports conversion equipment (being equivalent to Ethernet and serial converter 416); All kinds are copied control device (being equivalent to electric energy meter simulator 418).

Fig. 8 is according to the structural representation of the collecting device detection platform of the utility model embodiment, as shown in Figure 8, shows the general structure schematic diagram of the collecting device detection platform of this preferred embodiment.

Below the function of above-mentioned modules is introduced.

Detect the function of main website

For detection of concentrator, whether meet the systems soft ware that gathers related protocol and profile; Software adopts the Windows interface, simple and easy to operate of hommization.Configurable concentrator parameter, editor's detection scheme, test automatically, and provide and print detection record.Its function is as follows:

1, terminal electric energy meter/ac sampling device parameter configuration; To concentrator, issue parameter, the arbitrarily quantity of allocating and measuring point, address, communications protocol, user's size class-mark etc., wherein, Fig. 9 is the schematic diagram of the parameter configuration interface of the concentrator that provides according to the detection main website of the utility model preferred embodiment; Figure 10 is according to the schematic diagram of the parameter configuration display interface of concentrator in the detection main website of the utility model preferred embodiment.

2, detection scheme setting.According to the difference of test item, evaluation content, can work out arbitrarily, delete detection scheme, and arbitrarily combination.For example, Figure 11 is according to the schematic diagram of the parameter configuration display interface of the detection main website power source voltage influence module of the utility model preferred embodiment; Figure 12 is according to the schematic diagram of the parameter configuration display interface of carrier line length emulation module in the detection main website of the utility model preferred embodiment; Figure 13 is the schematic diagram of uploading the parameter configuration display interface of wave attenuation emulation module according to the detection main website of the utility model preferred embodiment; Figure 14 is according to the schematic diagram of the parameter configuration display interface of carrier-in-interference emulation module in the detection main website of the utility model preferred embodiment; Figure 15 is according to the schematic diagram of the parameter configuration display interface of RS845 line length emulation module in the detection main website of the utility model preferred embodiment; Figure 16 is according to the schematic diagram of the parameter configuration display interface of multiple emulation modules in the detection main website of the utility model preferred embodiment.Parameter configuration display interface shown in Figure 16 is for configuring the summation detection scheme of electric line carrier communication emulation.

3, support full-automatic testing.According to the detection scheme of establishment, one-touch startup, tests automatically by step, improves testing efficiency.Wherein, Figure 17 is according to the schematic diagram of the display interface of the full-automatic detected parameters configuration of the utility model preferred embodiment.Figure 18 is according to the schematic diagram of the display interface of the full-automatic testing process of the utility model preferred embodiment.

4, automatically generate test report.Figure 19 is according to the schematic diagram of the test report generating in the detection main website of the utility model preferred embodiment.

Virtual electric energy meter function

Virtual electric energy meter can adopt software to realize the communications protocol of hardware electric energy meter, function, and the main flow carrier protocol of multiple electric energy meter communications protocol and domestic main carrier wave manufacturer has been realized in its inside, can flexible configuration agreement, communications parameter.Under testing environment, coordinate suitable hardware interface, not only replaced the function of actual power table, and flexible operation, the scalable expansion of agreement, the more important thing is and avoided repeating numerous and diverse artificial wiring.

Electric line carrier communication (PLC) performance simulation detects

The transmission medium of carrier signal is low-voltage power line, has the impacts such as carrier signal interference, noise jamming, decay, impedance variation, signal distortion in power line, causes power line carrier communication to be difficult to realize 100% communication success rate.In order to weigh the quality of different vendor's concentrator carrier communication, analyzed after the simulation model of low-voltage power line, propose to adopt the various on-the-spot operating conditions of modularized design analogue simulation, carrier communication performance to concentrator under same test platform is comprehensively passed judgment on, and mentality of designing and scheme are as follows:

Power line length emulation module

Low-voltage power line is a kind of distributed circuit, and electric current has caused voltage drop along the line in the resistance of wire, has produced again the magnetic field of variation simultaneously around wire, and the magnetic field of this variation is along producing induced voltage completely.Voltage between wire continuously changes along the line, and simultaneously because this has formed electric capacity to wire, line-to-line just exists displacement current, when frequency is higher, can not ignore; Simultaneously during change in voltage, leakage current also can not be ignored.Like this in different place along the line, electric current difference, the model doing at this is that transmission line is regarded as to a kind of limit that a series of lamped elements form, the parameter of circuit is thought distribution along the line, Figure 20 is according to the schematic diagram of the line length circuit model of the utility model preferred embodiment, as shown in figure 20, provided the distributed circuit model of low-voltage power uniform transmission line.

According to Kirchhoff's law, can write voltage, the current equation of micro-section of dx:

$u-(u+\frac{\&PartialD;u}{\&PartialD;x}\mathrm{dx})=\left({\mathrm{<figure-callout\; id="0"\; label="R"\; filenames="HDA0000403620000000091.png,HDA0000403620000000101.png"\; state="\{\{state\}\}">R</figure-callout>}}_0\mathrm{dx}\right)i+\left({\mathrm{<figure-callout\; id="0"\; label="L"\; filenames="HDA0000403620000000091.png,HDA0000403620000000101.png"\; state="\{\{state\}\}">L</figure-callout>}}_0\mathrm{dx}\right)\frac{\&PartialD;i}{\&PartialD;t}$

$i-(i+\frac{\&PartialD;i}{\&PartialD;x}\mathrm{dx})={\mathrm{<figure-callout\; id="0"\; label="G"\; filenames="HDA0000403620000000091.png,HDA0000403620000000101.png"\; state="\{\{state\}\}">G</figure-callout>}}_0\mathrm{dx}(u+\frac{\&PartialD;u}{\&PartialD;x}\mathrm{dx})+{\mathrm{<figure-callout\; id="0"\; label="C"\; filenames="HDA0000403620000000091.png,HDA0000403620000000101.png"\; state="\{\{state\}\}">C</figure-callout>}}_0\mathrm{dx}\frac{\&PartialD;}{\&PartialD;t}(u+\frac{\&PartialD;u}{\&PartialD;x}\mathrm{dx})$

Arrange and omit after second-order differential amount dx, obtain low-voltage power uniform transmission line equation:

$\left\{\begin{array}{c}-\frac{\&PartialD;u}{\&PartialD;x}=R_{0}i+{\mathrm{<figure-callout\; id="0"\; label="L"\; filenames="HDA0000403620000000091.png,HDA0000403620000000101.png"\; state="\{\{state\}\}">L</figure-callout>}}_0\frac{\&PartialD;i}{\&PartialD;t}\\ -\frac{\&PartialD;i}{\&PartialD;x}=G_{0}u+{\mathrm{<figure-callout\; id="0"\; label="C"\; filenames="HDA0000403620000000091.png,HDA0000403620000000101.png"\; state="\{\{state\}\}">C</figure-callout>}}_0\frac{\&PartialD;u}{\&PartialD;t}\end{array}\right.$

Condition when initial according to top, terminal situation and time, can obtain the solution of equation, and electric current and voltage is temporal evolution not only, also with length variations.

Line length emulation module

Generally, power line length under a desk-top transformer is greatly between 1 kilometer to 2 kilometers, the low-voltage power uniform transmission line equation obtaining according to line length circuit model and the test of actual track, we have designed low-voltage power line length emulation module, and this module can realize at laboratory condition the emulation of power line length.Emulation module is divided into 1 meter, and 500 meters, 1000 meters, 1500 meters, 2000 meters of basic modules, the emulation that coordinates automatic switching apparatus can realize low-voltage power line length detects.

Carrier wave decay emulation module

Carrier wave decay is main by slackening and reflecting carrier signal such as circuit branch, circuit medium, the circuit time limit, line lengths.Attenuation characteristic is mainly manifested in several aspects such as line length, the forward and reverse transmission of circuit, carrier signal zero crossing and peak dot transmission attenuation, the alternate transmission of transformer.For analog attenuation amount, the design adopts carrier wave attenuator to carry out the decay of simulated line to carrier signal, and attenuator, in the fixing frequency range of power line carrier, is introduced the circuit of a predetermined decay, with is introduced the dB value and the characteristic impedance thereof that decay, identifies.

Figure 21 is according to the schematic diagram of the attenuator principle of the utility model preferred embodiment, and as shown in figure 21, carrier wave output-input voltage ratio is:

$\left|\frac{U_o}{U_I}\right|=\left|\frac{\frac{1}{\mathrm{j\&omega;<figure-callout\; id="2"\; label="C"\; filenames="HDA0000403620000000051.png,HDA0000403620000000052.png"\; state="\{\{state\}\}">C</figure-callout>}}}{2\mathrm{j\&omega;L}+\frac{1}{\mathrm{j\&omega;C}}}\right|=\left|\frac{1}{1-2{\mathrm{\&omega;}}^2\mathrm{LC}}\right|$

Being scaled decibel value is: $20\lg \left|\frac{U_o}{U_i}\right|=20\lg \left|\frac{1}{1-2{\mathrm{\&omega;}}^2\mathrm{LC}}\right|,$ Wherein ω=2 π f.

If carrier frequency is certain, select different inductance or electric capacity, just can determine the now basic design parameters of attenuator, thereby draw the decibel value of decay.

In the design of this decay carrier module, adopt specified decay dB:+0dB, 25dB, 50dB, 75dB and the adjustable design of 100dB, under the specified pad value of different carrier chip, by adjusting above several pad value, the load capacity of carrier communication effect, carrier module is passed judgment on.

Supply voltage affects module

According to concentrator demand of technical standard, concentrator working power permissible variation-20%～+ 20%.The design mainly tests the carrier meter reading success rate of concentrator under different operating power supply.By voltage regulator, experimental facilities power supply and external power source are isolated simultaneously, prevent from being subject in test process external interference.Change in voltage scope is AC220V ± 20%, evaluates the carrier meter reading success rate within the scope of AC176～AC264V.

Power line interference emulation module

Power line interference source is analyzed

The complexity existing on power line is disturbed can be divided into natural disturbance and artificial disturbance.The interference that natural disturbance causes as thunder and lightning, this interference will affect the power line data communication of moment.But can effectively avoid this type of to disturb the impact on data communication by the automatic retransmission mechanism of data and mechanism for correcting errors.Artificial disturbance is to be produced by the power consumption equipment being connected on power line, and on plc data, communication has serious impact, not only can cause signal error rate high, and receiving device cannot correctly be accepted; In addition, it also likely makes the inner self-interference that produces of receiving equipment, has a strong impact on the work of whole system.Therefore the design carries out design analysis mainly for artificial disturbance.

Interference on power line can not be thought additive property white Gaussian noise simply, in order to represent the complex nature of this interference and to simplify and analyze, can be divided into approx 3 classes: periodically disturb, time constant continuous interference and the random bursty interference producing.

(1) periodically disturb: main source is the equipment such as ghyristor circuit, electric mechanical, electrical air conditioner.Ghyristor circuit is generally present in electronic dimming equipment, and in the equipment such as Switching Power Supply, convertible frequency air-conditioner, the interference period that these equipment produce is generally the integral multiple of power frequency or power frequency; When the motor in the equipment such as fan, air-conditioning, washing machine moves, will on power line in the family, produce a large amount of high order harmonic components, this harmonic wave is the integral multiple of power frequency, its frequency can arrive several ten thousand hertz and energy comparison and concentrate, its frequency spectrum may partly cover signal spectrum, cause the reduction of signal to noise ratio, cause the increase of the error rate; The interference of television set is mainly the line frequency signal of 15～73kHz, and sort signal also has certain interference to power line.

(2) constant continuous interference time: because a large amount of household electrical appliance use simultaneously, discharge multiple interference, and instantaneous power of these interference, cycle, phase place etc. alter a great deal, different, constant continuous interference while therefore finally producing on the power line of portion within the family.This interference average power is smaller, but frequency spectrum is very wide and sustainable existence, it is generally acknowledged that this is the background noise of 10kHz～100MHz.The frequency spectrum of this interference likely partially or completely covers signal spectrum, and therefore, it is very low that the signal to noise ratio in communication process may become, and causes the communication error rate to increase.

(3) the random bursty interference producing: various high power loads will cause the acute variation of voltage, electric current as the short trouble on the unexpected ON/OFF of refrigerator, air-conditioning, washing machine etc., power circuit etc., the increase of harmonic component, causes impulse disturbances or impulse disturbances group that energy is very large.The duration that this class is disturbed is shorter, but concentration of energy, frequency spectrum is wide, and to carrier data, communication has a huge impact.In the in-plant scope of receiving node, the load of middle low power, affects communication efficiency as the ON/OFF of fluorescent lamp, computer etc. also can produce compared with large burst interference.

Power line interference the Realization of Simulation

According to the analysis to power line interference source, adopt periodic interference that the various household electrical appliance of signal projector emulation produce, time constant continuous interference and the random bursty interference producing, by signal coupling apparatus, the emulation interference waveform of generation is coupled in the power line channel of test again, reaches carrier meter reading success rate under emulation testing disturbance environment.Also can be according to site testing data, draw various interference waveforms and be coupled in measurement circuit, indoor, on-the-spot disturbed condition is reappeared, analyze the unsuccessful reason of data reading system, for the improvement of lower step provides reference.

RS485 communication performance detects

According to RS485 bus structures theory, under the prerequisite of ecotopia, RS485 bus transfer distance can reach 1200 meters.In the RS-485 of select drive bus, in the situation that communication baud rate is certain, bringing onto load number number, be directly related with the ultimate range of signal transmission.Physical relationship is: in the scope allowing in bus, bringing onto load number is more, and the distance that signal can transmit is just less; Bringing onto load number is fewer, and the distance that signal can transmit is just far away.

The design is in the situation that load is certain, by changing the impedance of RS485 connection, simulates 1 meter, and 200 meters, 500 meters, 1000 meters, the length of 1500 meters of connections, tests RS485 communication performance transmission range.

Key technology and innovative point

At present, domestic aspect concentrator performance evaluation the scheme of neither one system, yet do not have ripe experience and can use for reference, we have mainly carried out technological innovation and have felt free to try in following several respects.And reached following beneficial effect:

1, in traditional indoor test, owing to there being the equipment such as convertible frequency air-conditioner, fluorescent lamp, computer in building, in test environment with PERIODIC INTERFERENCE, bursty interference, during the test effect of finding evening in test is better than and daytime, day off is better than working, can not truly reflect the performance of concentrator, bring uncertainty to the judge of concentrator.Pass through above-described embodiment, build collecting device detection platform, in the various actual influence amounts of test lab simulation, under same standard, the performance of each manufacturer concentrator is carried out to overall merit, make to evaluate the data that draw and have authenticity, credibility, fairness, the situation of prevent erroneous judgement, failing to judge occurs.

2, modularized design, is easy to safeguard and upgrading.

Along with being in full swing of power information acquisition system construction, remote auto meter reading system has obtained applying more and more widely, promoting the use of in process of automatic meter reading system, utilize low-voltage power line as communication channel, the transmission that realizes data-signal has embodied its advantage day by day, but in application, is also faced with huge challenge.Power line has high decay, strong noise, feature that signal distortion is large, can be very large for different carrier chips, different modulation systems and his communication performance difference of the mechanism of checking meter.

For simulating the impact of the various amounts of impact on power line carrier, PLC quality, developed low-voltage power line length simulation unit, carrier wave attenuation units, interference units, change in voltage unit, RS485 length simulation unit, and be combined in a platform.Adopt modularized design, according to the carrier schemes of different vendor, carry out respectively test evaluation; Also can, according to on-the-spot ruuning situation, in conjunction with each manufacturer's various analog simulations of carrier chip feature combination in any unit, carry out integration test evaluation; Maintain easily and upgrade.

3, virtual electric energy meter design, presses close to on-the-spot actual.

The power of load capacity is to pass judgment on the key technical index of concentrator performance, for evaluating the load capacity of concentrator, in our test, all the actual table of band was tested in the past, due to the restriction of the chamber condition that is put to the test, it is also more single that the quantity of electric energy meter can not be taken maximum, stipulations to, and laboratory detects the concentrator passing through and is installed to and occurs the phenomenon that crashes, frequently restart after on-the-spot operation a period of time often.The main cause that causes this phenomenon be concentrator software programming unreasonable, there is leak, or memory size does not reach designing requirement.For addressing this problem, we adopt the scheme of Virtual table, and the load capacity of concentrator is evaluated.

Virtual electric energy meter software is mainly to adopt software to realize the communications protocol of hardware electric energy meter, function, and the main flow carrier protocol of multiple electric energy meter communications protocol and domestic main carrier wave manufacturer has been realized in its inside, can flexible configuration agreement, communications parameter.Under testing environment, coordinate suitable hardware interface, not only replaced the function of actual power table, and also the electric weight temporal evolution of having good luck, flexible operation, the scalable expansion of agreement, the more important thing is and avoided repeating numerous and diverse artificial wiring.

4, one-touch startup, full-automatic testing.

In concentrator test in the past, issue item by item parameter test, judge by testing staff according to job instruction, efficiency is extremely low, sometimes also may cause project undetected.This testing software adopts one-touch startup, automatically completes, and in test, without manual intervention, prevents undetected or flase drop; Testing scheme is flexibly customized, facilitates tester to change in time test plan; Also can automatically generate test report, effectively increase work efficiency.

5, multiple functional, evaluate comprehensively

This system, by low-voltage power line length l-G simulation test, interference test, change in voltage impact test and RS485 length l-G simulation test, has realized the overall merit of the concentrator performance to different carrier chip, different vendor.

6, society and Economic and Efficiency Analysis

The various extraneous factors of can effectively stopping the emulation platform that above-described embodiment provides cause collecting device to detect underproof event generation, safeguard the legitimate interests of both sides of supply and demand, be conducive to consolidate the legal status of the legal metering validation activity of province measurement centre, improve the degree of recognition of government and society to company, fully show state-owned enterprise's image that company is careful and responsible and the service image of sincere standard.

And power information collecting device performance detecting system has improved the quality of collecting device, shortened model machine detection time, reduce personnel's input, improved operating efficiency, guaranteed the timely supply of material of equipment, concrete comparative analysis sees the following form:

Obviously, those skilled in the art should be understood that, above-mentioned of the present utility model each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the utility model is not restricted to any specific hardware and software combination.

More than above are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims (10)

1. the emulation platform of a power information acquisition system, it is characterized in that comprising: electric pressure adjuster, concentrator, carrier line length simulator, carrier wave reduction emulator, carrier-in-interference simulator, RS485 line length simulator, RS485 interference simulation device, Ethernet and serial converter, electric energy meter simulator, parameter configuration and simulation result follower, wherein:

Described electric pressure adjuster, described concentrator, described RS485 line length simulator, described RS485 interference simulation device, described Ethernet are connected successively with serial converter, described parameter configuration and simulation result follower;

Described electric pressure adjuster, described carrier line length simulator, described carrier wave reduction emulator, described Ethernet are connected successively with serial converter;

Described carrier-in-interference simulator is connected with the input of described carrier wave reduction emulator.

2. platform according to claim 1, is characterized in that, described platform also comprises:

Low-voltage power line isolation pressurizer, is connected with described electric pressure adjuster, is used to described emulation platform that power supply is provided, and the power supply of external power source and described emulation platform is isolated.

3. platform according to claim 1, is characterized in that, described electric pressure adjuster, and for adjusting the electric pressure of the described emulation platform of input, wherein, the scope of described electric pressure comprises: exchange 264 volts of 176 volts～interchanges.

4. platform according to claim 1, is characterized in that, described concentrator for gathering user's power information, and offers described emulation platform by the power information of collection and carries out emulation transmission.

5. platform according to claim 1, it is characterized in that, described carrier line length simulator, for the impact of emulation different carrier line length on the signal of telecommunication on carrier line, wherein, described different carrier line length comprises one of following: 1 meter, 500 meters, 1000 meters, 1500 meters, 2000 meters.

6. platform according to claim 1, it is characterized in that, described RS485 line length simulator, impact for the different RS485 communication line of emulation length on the signal of telecommunication on RS485 communication line, wherein, described different RS485 communication line length comprises one of following: 1 meter, 500 meters, 1000 meters, 1500 meters, 2000 meters.

7. platform according to claim 1, it is characterized in that, described carrier wave reduction emulator, by carrier channel, detecting module is connected with described Ethernet and serial converter, for the specified pad value of emulation different carrier chip, wherein, the specified pad value of described different carrier chip comprises one of following: 0 decibel, 25 decibels, 50 decibels, 75 decibels, 100 decibels.

8. platform according to claim 1, it is characterized in that, described carrier-in-interference simulator and described RS485 interference simulation device, for generation of the interference signal of predetermined waveform, the interference signal of wherein said predetermined waveform is for the following interference one of at least of emulation: additive property white Gaussian noise, periodically disturb, time constant continuous interference and the random bursty interference producing.

9. according to the platform described in any one in claim 1 to 8, it is characterized in that, described parameter configuration and simulation result follower are also connected with described electric pressure adjuster, described carrier line length simulator, described carrier wave reduction emulator, described carrier-in-interference simulator, described RS485 line length simulator, described RS485 interference simulation device, described electric energy meter simulator respectively.

10. according to the platform described in any one in claim 1 to 8, it is characterized in that, described parameter configuration and simulation result follower comprise:

Configuration parameter input unit, for inputting the configuration parameter for configuring above-mentioned each simulator;

Simulation result output unit, for showing the simulation result of above-mentioned each simulator.

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