CN104202067A - Testing simulator for intelligent electric meter carrier communication module - Google Patents
Testing simulator for intelligent electric meter carrier communication module Download PDFInfo
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Abstract
The invention relates to the field of power line carrier communication, and particularly relates to a testing simulator for an intelligent electric meter carrier communication module. The simulator comprises a power supply purification unit, an electric energy meter base table interface unit, a carrier module interface unit, a low-voltage power line carrier channel simulation unit, a detecting unit and a centralized control computer, wherein the power supply purification unit is connected with the low-voltage power line carrier channel simulation unit and the carrier module interface unit respectively; the centralized control computer is connected with the low-voltage power line carrier channel simulation unit, the carrier module interface unit and the electric energy meter base table interface unit respectively; the carrier module interface unit is further connected with the low-voltage power line carrier channel simulation unit and the detecting unit respectively. According to the simulator provided by the invention, each of the basic characteristics of the intelligent electric meter carrier channel simulation module in an actual communication environment is simulated comprehensively and effectively, and the property parameters of a carrier module in different power line environments is tested effectively; moreover, the cost is low and the operation is convenient.
Description
Technical field
The present invention relates to power line carrier communication field, be specifically related to a kind of intelligent electric meter carrier communication module test gimulator.
Background technology
Intelligent electric meter carrier communication module is mainly used in power consumer power information acquisition system.Electric-power centralized meter reading system generally consists of jointly main website, concentrator, cascade terminal, collector and electric energy meter at present, and system architecture can be divided into 3 communication channels: the uplink communication channel of main website and concentrator; The downlink communication channel of concentrator and collector and electric energy meter; The cascaded communication channel of concentrator and cascade terminal.Aspect downlink communication channel, present stage mostly adopts PLC technology.Development gradually along with domestic and international PLC technology, signal modulation system is also more and more, and the modulation system that low-voltage powerline carrier communication chip is conventional has: narrow band communication technology, extension frequency carrier technology, OFDM (OFDM) technology, orthogonal multiple carrier technology, chain code adaptive technique etc.
Along with the development of intelligent grid, intelligent electric meter application is more and more extensive.When the producer of production of intelligent ammeter increases on market, carrier communication module and the modulation system thereof used are separately varied.Power line communication environment in the face of China's bulky complex, the performance that the product of each carrier communication module producer shows in actual power line environment is different, this has just brought difficulty for carrier communication module interchangeability in actual applications, seriously restrict the development of intelligent grid, improved the construction cost of electrical network.In order to pass judgment on the communication performance of the low-voltage power line carrier communication module that different manufacturers produces, for afterwards, to carrier communication module interchangeability, research provides Data support, present stage is starved of a kind of carrier communication module test gimulator, to realize the test of carrier communication module parameter and assessment, and can the key technology of this test gimulator be just to low-voltage power line communication environment, effectively simulate.
Intelligent electric meter carrier communication module is between electric energy meter base table and power line, and its communication environment is comparatively complicated, and measurement difficulty to carrier communication module parameter in actual environment is large, cost is high, do not have universality in specific environment.Test gimulator is the communication environment of analog carrier communication module effectively, conveniently carrier communication module parameter is measured.At present the analogue system of low-voltage power line communication environment relates generally to communicating by letter between concentrator and electric meter carrier wave module, do not consider the impact of electric energy meter base table on carrier communication module parameter generating, there is the defect that complex structure, specific aim are not strong, cost is high.For the test of carrier communication module, concentrator has only played the effect that sends communication instruction, and need not add for the test of carrier communication module, causes the waste of functional parameter.
In sum, existing low-voltage powerline carrier communication analogue technique does not design for carrier communication module test, communication environment that can not comprehensive and accurate reflection intelligent electric meter carrier communication module both sides, there is the defect that complex structure, specific aim are not strong, cost is high, cannot meet the needs of intelligent electric meter carrier communication module interchangeability research.
Summary of the invention
The object of the present invention is to provide a kind of intelligent electric meter carrier communication module test gimulator, solved existing analogue technique not accurate and comprehensive enough to the communication environment reflection of intelligent electric meter carrier communication module both sides, and the high problem of complex structure cost.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: a kind of intelligent electric meter carrier communication module test gimulator, comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, low voltage power line carrier channel simulation unit, detecting unit and centralized control computer, described power purification unit and described low voltage power line carrier channel simulation unit, carrier module interface unit connects respectively, described centralized control computer and described low voltage power line carrier channel simulation unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with low voltage power line carrier channel simulation unit, detecting unit connects respectively,
Described power purification unit is used to this simulator inside electric energy, isolation interference noise are provided and eliminate carrier signal and the impact of noise on described carrier module interface unit that described low voltage power line carrier channel simulation unit produces; Described low voltage power line carrier channel simulation unit comprises the simulation of the communication environment features such as concentrator signal, power line noise, loss decay, power line impedance and power line load for the signal of the power purification unit output to described; Described carrier module interface unit is used to the carrier module being connected with described carrier module interface unit that electric energy is provided, and realizes the communication link from described low voltage power line carrier channel simulation unit to described electric energy meter base table interface unit; Described electric energy meter base table interface unit is used to the electric energy meter being connected with described electric energy meter base table interface unit that communication connection is provided; Described detecting unit is for testing described carrier communication module input and output signal parameter; Described centralized control computer is used for the control of each channel characteristics simulation in described low voltage power line carrier Channel Elements, communicates test described communication equipment and communicate to detect and control electric energy meter state parameter with described electric energy meter base table interface unit with carrier communication unit.
Further technical scheme is, described power purification unit comprises first order filter circuit and the second level filter circuit connecting successively from civil power, second level filter circuit is connected to described carrier module interface unit, and described low voltage power line carrier channel simulation unit is connected between first order filter circuit and second level filter circuit by carrier separation circuit;
Described first order filter circuit is used to this simulator that power supply is provided, and eliminates by impedance matching the interference noise that external power source brings to communication channel; Described second level filter circuit is used to described carrier module interface unit that power supply is provided, and eliminates carrier signal and the impact of noise on described carrier module interface unit that described low voltage power line carrier channel simulation unit produces; Described carrier separation circuit is for separating of power frequency component and the high frequency carrier signal of communication of the output of first order filter circuit.
Further technical scheme is, described low voltage power line carrier channel simulation unit comprises concentrator signal loading module, noise load-on module, fading channel module, power line transport module and the power line load blocks that is all connected with centralized control computer and connects successively from carrier separation circuit, and described power line load blocks is connected to respectively electric energy meter base table interface unit, carrier module interface unit and detecting unit;
The electric power signal that described concentrator signal loading module is exported to the first order filter circuit of the power purification unit from described for the simulation concentrator instruction load that the centralized control computer by described is produced, completes concentrator and intelligent electric meter is sent to the simulation of control command; Described noise load-on module is for the carrier communication signal loading noise of the concentrator signal loading module output to described; Described fading channel module is carried out damped impedance simulation for the signal of the noise load-on module output to described; Described power line transport module is for carrying out transfer impedance simulation to the output signal of described fading channel module; Described power line load blocks is for carrying out load impedance simulation to the signal of described power line transport module output.
Further technical scheme is, described concentrator signal loading module comprises and connects successively serial communication interface, storage chip, D/A conversion chip and power amplifier, wherein said serial communication interface is connected to centralized control computer by RS232 interface, described power amplifier is connected to noise load-on module, and described power purification unit is connected between D/A conversion chip and power amplifier.
Further technical scheme is, described carrier module interface analogue unit comprises power supply noise injection circuit, protective circuit unit and the carrier module socket connecting successively from power purification unit, described carrier module socket connects low voltage power line carrier channel simulation unit and electric energy meter base table interface unit, and described power supply noise injection circuit is connected with centralized control computer;
Described power supply noise injection circuit adds noise for the power supply that provides to carrier module, take characteristics such as simulating power supply noise noise in the power supply that carrier module provides of electric energy meter in side circuit and power supply ripple noise; The power supply that described protective circuit unit is used to electric energy meter base table to offer described carrier module interface unit provides overvoltage, overcurrent and electrostatic protection; Described carrier module socket is for transmitting the carrier (boc) modulated signals between low voltage power line carrier channel simulation unit and electric energy meter base table interface unit.
Further technical scheme is, described electric energy meter interface module comprises electric appliance load module and the electric energy meter base table socket connecting successively from centralized control computer, and described electric energy meter base table socket is connected to carrier module interface unit;
Described electric appliance load module is for accessing the electric appliance load characteristic simulation of ammeter to actual user; Described electric energy meter base table socket is for transmitting the ammeter information between electric appliance load characteristic simulation and carrier module interface unit.
Further technical scheme is, described detecting unit is oscilloscope or frequency spectrograph.
Compared with prior art, the invention has the beneficial effects as follows:
The interference of external power source noise to carrier communication channel and the test of carrier module power supply noise that the present invention has passed through power subsystem filtering, for whole simulator provides good test environment; Control by centralized control computer to low-voltage powerline carrier communication unit and carrier module interface unit, has realized the simulation to the power line interface of carrier module and this both sides communication environment of electric energy meter base table interface; By the cooperation of the electric energy meter base table socket in the carrier module socket in carrier module interface unit and electric energy meter base table interface unit, the electric energy meter base table of the different vendor's production running in actual conditions and the adaptive test problem between different carrier module have been solved.Than existing technology, example of the present invention can meet the requirement of various different carrier module testings, comprehensively and effectively simulated intelligence electric meter carrier wave communication module is in every essential characteristic of practical communication environment, can effectively test the performance parameter of carrier module in different power line environment, realize cost low, easy to operate, be conducive to promote the research of intelligent electric meter carrier communication module interchangeability.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of an embodiment of intelligent electric meter carrier communication module test gimulator of the present invention.
Fig. 2 is the detailed block diagram of the test gimulator based on Fig. 1.
Fig. 3 is the structured flowchart of the concentrator signal loading module of the example according to the present invention.
Fig. 4 is the structured flowchart of the carrier module interface unit of the example according to the present invention.
Fig. 5 is the structured flowchart of the electric energy meter base table interface unit of the example according to the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows an embodiment of intelligent electric meter carrier communication module test gimulator of the present invention: a kind of intelligent electric meter carrier communication module test gimulator, it is characterized in that: comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, low voltage power line carrier channel simulation unit, detecting unit and centralized control computer, described power purification unit and described low voltage power line carrier channel simulation unit, carrier module interface unit connects respectively, described centralized control computer and described low voltage power line carrier channel simulation unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with low voltage power line carrier channel simulation unit, detecting unit connects respectively,
Described power purification unit is used to this simulator inside electric energy, isolation interference noise are provided and eliminate carrier signal and the impact of noise on described carrier module interface unit that described low voltage power line carrier channel simulation unit produces; Described low voltage power line carrier channel simulation unit comprises the simulation of the communication environment features such as concentrator signal, power line noise, loss decay, power line impedance and power line load for the signal of the power purification unit output to described; Described carrier module interface unit is used to the carrier module being connected with described carrier module interface unit that electric energy is provided, and realizes the communication link from described low voltage power line carrier channel simulation unit to described electric energy meter base table interface unit; Described electric energy meter base table interface unit is used to the electric energy meter being connected with described electric energy meter base table interface unit that communication connection is provided; Described detecting unit is for testing described carrier communication module input and output signal parameter; Described centralized control computer is used for the control of each channel characteristics simulation in described low voltage power line carrier Channel Elements, communicates test described communication equipment and communicate to detect and control electric energy meter state parameter with described electric energy meter base table interface unit with carrier communication unit.
In the above-described embodiments, described carrier module is directly used in to the power supply of low voltage power line carrier channel simulation unit, has reduced the impact of carrier signal on simulator power supply, saved the power supply circuits of low voltage power line carrier channel simulation unit simultaneously; Carrier module is separated with electric energy meter base table, realize freely mating between dissimilar carrier module and electric energy meter, contribute to the research of carrier communication module interchangeability.
Fig. 2 shows a preferred embodiment of intelligent electric meter carrier communication module test gimulator of the present invention, described power purification unit comprises first order filter circuit and the second level filter circuit connecting successively from civil power, second level filter circuit is connected to described carrier module interface unit, and described low voltage power line carrier channel simulation unit is connected between first order filter circuit and second level filter circuit by carrier separation circuit;
Described first order filter circuit is used to this simulator that power supply is provided, and eliminates by impedance matching the interference noise that external power source brings to communication channel; Described second level filter circuit is used to described carrier module interface unit that power supply is provided, and eliminates carrier signal and the impact of noise on described carrier module interface unit that described low voltage power line carrier channel simulation unit produces; Described carrier separation circuit is for separating of power frequency component and the high frequency carrier signal of communication of the output of first order filter circuit.
As preferably, carrier separation circuit adopts V-type artificial mains network, power supply input is connected with first order filter circuit, power output end, for described low voltage power line carrier channel simulation unit provides 220V power frequency component, disturbs output to be connected to export high frequency carrier signal of communication with described concentrator signal loading module.
Fig. 2 also shows another preferred embodiment of intelligent electric meter carrier communication module test gimulator of the present invention, described low voltage power line carrier channel simulation unit comprises concentrator signal loading module, noise load-on module, fading channel module, power line transport module and the power line load blocks that is all connected with centralized control computer and connects successively from carrier separation circuit, and described power line load blocks is connected to respectively electric energy meter base table interface unit, carrier module interface unit and detecting unit;
The electric power signal that described concentrator signal loading module is exported to the first order filter circuit of the power purification unit from described for the simulation concentrator instruction load that the centralized control computer by described is produced, completes concentrator and intelligent electric meter is sent to the simulation of control command; Described noise load-on module is for the carrier communication signal loading noise of the concentrator signal loading module output to described; Described fading channel module is carried out damped impedance simulation for the signal of the noise load-on module output to described; Described power line transport module is for carrying out transfer impedance simulation to the output signal of described fading channel module; Described power line load blocks is for carrying out load impedance simulation to the signal of described power line transport module output.
Above-mentioned is in strength, and described noise load-on module forms noise file storehouse under actual measurement environment, realizes the effective simulation to power supply noise noise and power supply ripple noise characteristic; Described concentrator signal loading module, forms instruction database file to dissimilar concentrator command signal collection, by the multiple concentrator instruction simulation of centralized control computer realization, has reduced testing cost.
Fig. 3 shows another preferred embodiment of intelligent electric meter carrier communication module test gimulator of the present invention, described concentrator signal loading module comprises and connects successively serial communication interface, storage chip, D/A conversion chip and power amplifier, wherein said serial communication interface is connected to centralized control computer by RS232 interface, described power amplifier is connected to noise load-on module, and described power purification unit is connected between D/A conversion chip and power amplifier.
Described concentrator signal loading module gathers concentrator different instruction signal formation command signal library file, when being tested, carrier module by centralized control computer, corresponding concentrator command signal is imported into the described serial communication interface of concentrator signal loading module by RS232 interface, described storage chip carries out buffer-stored to concentrator command signal, described D/A conversion chip is for being converted to analog signal by concentrator command signal, stack with realization with carrier signal, described power amplifier carries out power amplification by the signal after stack, thereby realize the loading of concentrator signal.
Fig. 4 shows another preferred embodiment of intelligent electric meter carrier communication module test gimulator of the present invention, described carrier module interface analogue unit comprises power supply noise injection circuit, protective circuit unit and the carrier module socket connecting successively from power purification unit, described carrier module socket connects low voltage power line carrier channel simulation unit and electric energy meter base table interface unit, and described power supply noise injection circuit is connected with centralized control computer;
Described power supply noise injection circuit adds noise for the power supply that provides to carrier module, take characteristics such as simulating power supply noise noise in the power supply that carrier module provides of electric energy meter in side circuit and power supply ripple noise; The power supply that described protective circuit unit is used to electric energy meter base table to offer described carrier module interface unit provides overvoltage, overcurrent and electrostatic protection; Described carrier module socket is for transmitting the carrier (boc) modulated signals between low voltage power line carrier channel simulation unit and electric energy meter base table interface unit.
Described noise load-on module is connected with described centralized control computer, complexity due to noise, actual measurement gathers the formation of noise noise file storehouse in varying environment, by described centralized control computer, provide noise file, D/A conversion, noise through described noise load-on module amplify, be loaded in carrier signal, complete the simulation to power line noise feature.As preferably, described signal attenuation unit adopts adjustable attenuator, to realize in simulation power line environment decay in various degree, completes carrier communication modularity parameter testing under differential declines.
Fig. 5 shows another preferred embodiment of intelligent electric meter carrier communication module test gimulator of the present invention, described electric energy meter interface module comprises electric appliance load module and the electric energy meter base table socket connecting successively from centralized control computer, and described electric energy meter base table socket is connected to carrier module interface unit;
Described electric appliance load module is for accessing the electric appliance load characteristic simulation of ammeter to actual user; Described electric energy meter base table socket is for transmitting the ammeter information between electric appliance load characteristic simulation and carrier module interface unit.
Another preferred embodiment of intelligent electric meter carrier communication module test gimulator according to the present invention, described detecting unit is oscilloscope or frequency spectrograph.
In sum, the interface simulator that the embodiment of the present invention provides can be realized following beneficial effect:
(1) this interface simulator for carrier communication module comprehensive simulated the power line channel environmental characteristic that the work of carrier module is exerted an influence, power supply noise feature, electric energy meter base table communication feature;
(2) by centralized control computer, connect, realization is controlled the adjusting of the channel parameters such as power line noise, power line channel decay, power line transfer impedance, power line load, carrier module power supply noise and electric appliance load in carrier communication, to realize the test of carrier communication module parameter under different communication environment;
(3) command signal of dissimilar concentrator is gathered and forms instruction database file, by concentrator signal loading module, can realize the control to intelligent electric meter end carrier communication module input and output carrier signal, realization is simulation to multiple concentrator, and having reduced concentrator is use cost;
(4) noise file storehouse produces by surveying ambient noise, power supply noise injection module is realized the effective simulation to power supply noise noise and power supply ripple noise characteristic, by the adjusting noise of centralized control computer, realize carrier communication module power adaptation is tested;
(5) carrier module socket and electric energy meter base table socket meet respectively the communication interface standard of carrier module and electric energy meter base table, realize and meet the matching test of different electric energy meter base tables to different carrier module.
Although with reference to a plurality of explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and execution modes, and these are revised and within execution mode will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to the building block of subject combination layout and/or layout.Except distortion that building block and/or layout are carried out and improving, to those skilled in the art, other purposes will be also obvious.
Claims (7)
1. an intelligent electric meter carrier communication module test gimulator, it is characterized in that: comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, low voltage power line carrier channel simulation unit, detecting unit and centralized control computer, described power purification unit and described low voltage power line carrier channel simulation unit, carrier module interface unit connects respectively, described centralized control computer and described low voltage power line carrier channel simulation unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with low voltage power line carrier channel simulation unit, detecting unit connects respectively,
Described power purification unit is used to this simulator inside electric energy, isolation interference noise are provided and eliminate carrier signal and the impact of noise on described carrier module interface unit that described low voltage power line carrier channel simulation unit produces; Described low voltage power line carrier channel simulation unit communicates the simulation of environmental characteristic for the signal of the power purification unit output to described; Described carrier module interface unit is used to the carrier module being connected with described carrier module interface unit that electric energy is provided, and realizes the communication link from described low voltage power line carrier channel simulation unit to described electric energy meter base table interface unit; Described electric energy meter base table interface unit is used to the electric energy meter being connected with described electric energy meter base table interface unit that communication connection is provided; Described detecting unit is for testing described carrier communication module input and output signal parameter; Described centralized control computer is used for the control of each channel characteristics simulation in described low voltage power line carrier Channel Elements, communicates test described communication equipment and communicate to detect and control electric energy meter state parameter with described electric energy meter base table interface unit with carrier communication unit.
2. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described power purification unit comprises first order filter circuit and the second level filter circuit connecting successively from civil power, second level filter circuit is connected to described carrier module interface unit, and described low voltage power line carrier channel simulation unit is connected between first order filter circuit and second level filter circuit by carrier separation circuit;
Described first order filter circuit is used to this simulator that power supply is provided, and eliminates by impedance matching the interference noise that external power source brings to communication channel; Described second level filter circuit is used to described carrier module interface unit that power supply is provided, and eliminates carrier signal and the impact of noise on described carrier module interface unit that described low voltage power line carrier channel simulation unit produces; Described carrier separation circuit is for separating of power frequency component and the high frequency carrier signal of communication of the output of first order filter circuit.
3. intelligent electric meter carrier communication module test gimulator according to claim 2, it is characterized in that: described low voltage power line carrier channel simulation unit comprises concentrator signal loading module, noise load-on module, fading channel module, power line transport module and the power line load blocks that is all connected with centralized control computer and connects successively from carrier separation circuit, and described power line load blocks is connected to respectively electric energy meter base table interface unit, carrier module interface unit and detecting unit;
The electric power signal that described concentrator signal loading module is exported to the first order filter circuit of the power purification unit from described for the simulation concentrator instruction load that the centralized control computer by described is produced, completes concentrator and intelligent electric meter is sent to the simulation of control command; Described noise load-on module is for the carrier communication signal loading noise of the concentrator signal loading module output to described; Described fading channel module is carried out damped impedance simulation for the signal of the noise load-on module output to described; Described power line transport module is for carrying out transfer impedance simulation to the output signal of described fading channel module; Described power line load blocks is for carrying out load impedance simulation to the signal of described power line transport module output.
4. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described concentrator signal loading module comprises and connects successively serial communication interface, storage chip, D/A conversion chip and power amplifier, wherein said serial communication interface is connected to centralized control computer by RS232 interface, described power amplifier is connected to noise load-on module, and described power purification unit is connected between D/A conversion chip and power amplifier.
5. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described carrier module interface analogue unit comprises power supply noise injection circuit, protective circuit unit and the carrier module socket connecting successively from power purification unit, described carrier module socket connects low voltage power line carrier channel simulation unit and electric energy meter base table interface unit, and described power supply noise injection circuit is connected with centralized control computer;
Described power supply noise injection circuit adds noise for the power supply that provides to carrier module, take characteristics such as simulating power supply noise noise in the power supply that carrier module provides of electric energy meter in side circuit and power supply ripple noise; The power supply that described protective circuit unit is used to electric energy meter base table to offer described carrier module interface unit provides overvoltage, overcurrent and electrostatic protection; Described carrier module socket is for transmitting the carrier (boc) modulated signals between low voltage power line carrier channel simulation unit and electric energy meter base table interface unit.
6. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described electric energy meter interface module comprises electric appliance load module and the electric energy meter base table socket connecting successively from centralized control computer, and described electric energy meter base table socket is connected to carrier module interface unit;
Described electric appliance load module is for accessing the electric appliance load characteristic simulation of ammeter to actual user; Described electric energy meter base table socket is for transmitting the ammeter information between electric appliance load characteristic simulation and carrier module interface unit.
7. intelligent electric meter carrier communication module test gimulator according to claim 1, is characterized in that: described detecting unit is oscilloscope or frequency spectrograph.
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Application publication date: 20141210 |