CN102401864B - Laboratory simulation detection device for low-voltage meter reading system - Google Patents
Laboratory simulation detection device for low-voltage meter reading system Download PDFInfo
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Abstract
The invention discloses a laboratory simulation detection device for a low-voltage meter reading system and aims to provide the laboratory simulation detection device for the low-voltage meter reading system, wherein the laboratory simulation detection device can carry out comprehensive test on all independent collecting equipment of the low-voltage meter reading system and the whole low-voltage meter reading system and can evaluate the data collecting and communication ability of the low-voltage meter reading system under the site environment in the laboratory environment. The laboratory simulation detection device comprises a to-be-detected product group, an equipment basic-parameter testing unit, a carrier wave launching testing unit, a receiving sensitivity testing unit, an interference signal simulation module, a relay routing simulation module, a reactive power compensation simulation module, a line impedance simulation module, a testing unit and simulation module control system, a testing device master station platform, a testing device master station control software and a power supply. In the laboratory simulation detection device, the software simulation technique and the hardware simulation technique are adopted to carry out the comprehensive test on all the independent collecting equipment of the low-voltage meter reading system and the whole low-voltage meter reading system, and the data collecting and communication ability of the low-voltage meter reading system under the site environment can be evaluated under the laboratory environment.
Description
Technical field
The present invention relates to a kind of laboratory simulation detection device for low-voltage meter reading system.
Background technology
From at the end of last century, China's electric system is with unprecedented speed fast development, the needs that coordinate national economic development, the construction of intelligent grid is fully under way in each grid company, and a very important construction link of intelligent grid is exactly the foundation of power consumer power information acquisition system.Power consumer power information acquisition system is the system that the power information of power consumer is gathered, processed and monitors in real time.
An important component part of power consumer power information acquisition system is exactly low-voltage collecting meter reading system.Low-voltage collecting meter reading system refers to comprising the collection of the user power utilization information such as low pressure business, low-power, office, resident.
As shown in Figure 1, this low-voltage collecting meter reading system is comprised of electric energy meter, collector, concentrator, main station system.Electric energy meter is for the power information of metering user, collector is by RS485 or PLC(power carrier) communication modes gathers power information, then by PLC communication modes, is uploaded to concentrator from electric energy meter, and concentrator uploads to main website management system by GPRS communication modes.
Power carrier communication (PLC) is to utilize line of electric force as information transmission medium, the information of required transmission is carried out to the technology of high-speed transfer, its have high reliability, survivability strong, need not set up the feature of dedicated line and obtain fast development, this communication modes is one of the most frequently used means of communication of low-voltage collecting meter reading system, numerous production firms have released carrier communication electric energy meter, acquisition terminal, the concentrator of various models, are widely used in power department electric quantity metering and power consumer power information acquisition system.
On the low-voltage power line of 220V/380V, carry out signal transmission, exist substation transformer to various undesired signals on the buffer action of carrier signal, line of electric force to load on the interference of carrier communication, line of electric force to problems such as the phase mutual interference between the decay of carrier signal, different carrier signal, power circuit impedance variation, usually because of these problems, cause power information cannot transmission, the problem such as error of transmission, transmission range be far away not and whole system cannot be worked.
Whole centralized meter-reading system is under so complicated site environment, can intrasystem electric energy meter, concentrator, collector work by design objective? how is the antijamming capability of its descending and uplink communication? whether receiving sensitivity index up to standard? is signal lost and is changed in transmitting procedure? whether the success ratio that whole system is copied and accepted information qualified? how to detect? it is electric-power metering administrative authority problem anxious to be resolved.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiencies in the prior art, provide a kind of in low-voltage collecting meter reading system each independently collecting device and whole low-voltage collecting meter reading system carry out integration test, can under laboratory environment, assess this system data acquisition under environment and the laboratory simulation detection device for low-voltage meter reading system of ability to communicate at the scene.
The technical solution adopted in the present invention is: a kind of laboratory simulation detection device for low-voltage meter reading system, comprises power supply, test product group, equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and for controlling the control system of above-mentioned test cell and emulation module, described test product group comprises the electric energy meter that communication successively connects, collector, concentrator, described test product group and described equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and control system are electrically connected to, described power supply and described Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and control system are electrically connected to, and above-mentioned each test cell and emulation module are all electrically connected to control system and transfer data to proving installation main website platform by this control system.
Described equipment basic parameter test cell comprises power consumption test circuit, frequency-selecting and level detecting circuit, basic communication function detecting unit, relay function detects and data retransmission Function detection circuit, described power consumption test circuit comprises voltage sample module, current sample module, electric energy computation chip, CPU, described voltage sample module is connected with described electric energy computation chip with current sample module and after connecing, described electric energy computation chip connects CPU, described voltage sample utilizes voltage transformer (VT) to carry out voltage sample, described current sample utilizes current transformer to carry out current sample, described electric energy computation chip completes electric weight accumulation, store and electric weight is converted to corresponding pulse simultaneously and export CPU to, described CPU processes and is uploaded to main website management end to information about power.
Described frequency-selecting and level detecting circuit comprise tested instrument, selecive level meter and processor, described selecive level meter is electrically connected to processor, described tested instrument is connected with alternating current 220V voltage with filtering circuit by gating with selecive level meter, utilize selecive level meter to catch carrier communication signal, and exporting test result to processor, processor processes to the signal collecting centre frequency and the communication baud rate that computing obtains tested carrier signal.
Described relay function detects and data retransmission Function detection circuit comprises subcarrier instrument, carrier signal attenuator, tested carrier wave instrument, main website controls software and K switch 1, K switch 2, described subcarrier instrument, carrier signal attenuator, tested carrier wave instrument, main website controls software and connects successively, described K switch 1 is in parallel with described carrier signal attenuator, described K switch 2 is in parallel with described tested carrier wave instrument, cut-off switch K1, K2 closes a switch, adjust the damping capacity of carrier signal attenuator, make main website control software directly copy reading to the information about power in subcarrier instrument, then adjust the damping capacity of carrier signal attenuator, until main website control software can not copy reading to the information about power in subcarrier instrument, cut-off switch K2, main website controls software should be able to be by the information about power in tested carrier wave instrument copy reading subcarrier instrument, cut-off switch K2, K1 closes a switch, main website controls software should be able to be by the information about power in tested carrier wave instrument copy reading subcarrier instrument.
Described receiving sensitivity test cell comprise carrier signal generator, can adjusting carrier signal attenuator and electronic switch, described carrier signal generator, can adjusting carrier signal attenuator, electronic switch is electrically connected to successively, described electronic switch has a plurality of output ports can select to be connected in described tested carrier wave instrument.
Described Jamming Signal Simulation module comprises microprocessor, undesired signal generator, selector switch, described microprocessor, undesired signal generator, selector switch connect successively, and the undesired signal that described undesired signal generator can send various electrical equipment is connected on the PLC network of described electric energy meter, collector, concentrator through selector switch.
Described line impedance emulation module comprises microprocessor, loaded impedance emulation module, selector switch, described microprocessor, loaded impedance emulation module, selector switch connect successively, and the impedance signal of the various electrical equipment that described loaded impedance emulation module simulates is connected on the PLC network of described electric energy meter, collector, concentrator through selector switch.
The invention has the beneficial effects as follows: due to the present invention, it comprises test product group, equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module, the control system of above-mentioned test cell and emulation module, proving installation main website platform and control software, power supply, described test product group comprises electric energy meter, collector, concentrator, described test product group and described equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and control system are electrically connected to, described power supply and described Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and control system are electrically connected to, described test cell and emulation module control system and described proving installation main website platform and control software and be electrically connected to, thus the present invention be a kind of in low-voltage collecting meter reading system each independently collecting device and whole low-voltage collecting meter reading system carry out integration test, can under laboratory environment, assess this system data acquisition under environment and the laboratory simulation detection device for low-voltage meter reading system of ability to communicate at the scene.
Accompanying drawing explanation
Fig. 1 is a kind of common low-voltage collecting meter reading system schematic diagram:
Fig. 2 is circuit structure block diagram of the present invention;
Fig. 3 is power consumption test circuit structure block diagram of the present invention;
Fig. 4 is frequency-selecting of the present invention and level detecting circuit structure block diagram;
Fig. 5 is the basic communication function detecting unit of the present invention block diagram;
Fig. 6 is that relay function of the present invention detects and data retransmission Function detection circuit block diagram;
Fig. 7 is carrier transmit level detecting cellular construction block diagram of the present invention;
Fig. 8 is receiving sensitivity test cell theory diagram of the present invention;
Fig. 9 is Jamming Signal Simulation module theory diagram of the present invention;
Figure 10 is line impedance emulation module theory diagram of the present invention;
Figure 11 is the test wiring diagram of the relaying degree of depth of the present invention on carrier wave impact.
Embodiment
As shown in Figures 2 to 11, the present invention includes test product group, equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module, the control system of test cell and emulation module, proving installation main website platform and control software, power supply, described test product group comprises electric energy meter, collector, concentrator, described control system comprises each unit control circuit, microprocessor, serial server, described power supply comprises program control three phase sources, purified voltage stabilized power source, described test product group and described equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module, control system is electrically connected to, described power supply and described Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module, control system is electrically connected to, and described test cell and emulation module control system are electrically connected to described proving installation main website platform and control software.
Each several part with regard to the present embodiment is described in further detail below:
(1) equipment basic parameter test cell: partly formed by power consumption test circuit, frequency-selecting and level detecting circuit, basic communication function detecting unit, relay function detection and data retransmission Function detection circuit etc.Power consumption test circuit forms electric energy meter, the collector of low-voltage collecting meter reading system, static state and the dynamic power consumption of concentrator, voltage sample: utilize voltage transformer (VT) to sample to operating voltage for testing.Current sample: utilize current transformer to sample to working current.Electric energy computation chip: complete electric weight accumulation, store, and electric weight is converted to the microprocessor (CPU) of corresponding pulse output, microprocessor (CPU): main website management end is processed and be uploaded to information about power simultaneously.
Centre frequency and communication baud rate detect explanation: utilize selecive level meter to catch carrier communication signal, and export test result to CPU, CPU processes computing to the signal collecting, and obtains centre frequency and the communication baud rate of tested carrier signal.
Basic communication function detecting unit is comprised of and connecting test device main website platform RS485 communication network, power carrier communication network, GPRS communication network, the main website of proving installation main website platform controls software and sends meter reading instruction by RS485 communication network and DL/T 698.41 communications protocol, information about power in reading power meters, collector, concentrator, detects the meter reading data percentage of head rice under RS485 communication mode and copies and accepts success ratio respectively.Main website controls software and sends meter reading instruction by power carrier communication (PLC) network and DL/T 698.41 communications protocol, information about power in reading power meters, collector, concentrator, detects the meter reading data percentage of head rice under power carrier communication pattern and copies and accepts success ratio respectively.Main website controls software and sends meter reading instruction by GPRS communication network and DL/T 698.41 communications protocol, reads the information about power in concentrator, detects the meter reading data percentage of head rice under GPRS communication mode and copies and accepts success ratio.Main website controls software and to concentrator, sends meter reading instruction by GPRS communication network and DL/T 698.41 communications protocol, control software in concentrator sends meter reading instruction by power carrier communication (PLC) network and DL/T 698.42 communications protocol to collector, collector, by the information about power in RS485 communication network and DL/T645 agreement reading power meters, detects the meter reading data percentage of head rice of whole low-voltage collecting meter reading system and copies and accepts success ratio.
Relay function detects explanation: cut-off switch K1, K2 closes a switch, adjust the damping capacity of carrier signal attenuator, make main website control software directly copy reading to the information about power in subcarrier instrument, then adjust the damping capacity of carrier signal attenuator, until main website control software can not copy reading to the information about power in subcarrier instrument, cut-off switch K2， main website controls software should be able to be by the information about power in tested carrier wave instrument copy reading subcarrier instrument.
Data retransmission Function detection explanation: cut-off switch K2, the K1， main website that closes a switch controls software should be able to be by the information about power in tested carrier wave instrument copy reading subcarrier instrument.
(2) carrier transmit level detecting unit: the maximum carrier signal launching electrical level of test carrier electric energy meter, collector, concentrator.Utilize selecive level meter to catch carrier communication signal, and export test result to CPU, CPU processes computing to the signal collecting, and obtains the emission maximum level of tested carrier signal.
(3) receiving sensitivity test cell: the carrier signal receiving sensitivity of test carrier electric energy meter, collector, concentrator, test specification: carrier signal generator is pressed the carrier signal of concerned countries standard output standard, can this signal be divided into several gears of varying level size by adjusting carrier signal attenuator, main website controls software control level change-over switch, from level maximum, to little level shelves, switch according to this, and in the relevant information of each gear copy reading carrier signal generator, judge according to this carrier signal receiving sensitivity of tested carrier wave instrument.
(4) Jamming Signal Simulation module common electrical load of emulation low-voltage power supply network under laboratory environment, under the control of microprocessor, undesired signal generator can produce common load on low-voltage power line, the undesired signal with its feature producing on power circuit as washing machine, televisor, hair dryer, refrigerator, air-conditioning, elevator etc., main website controls software control interference source change-over switch, different interference source is introduced to test loop, test respectively the impact on carrier communication of undesired signal that these electrical loads produce.
(5) line impedance emulation module: the defeated in/out impedance variation of power-line carrier channel is very large, the electrical load that low-voltage power supply network is common, as: washing machine, televisor, hair dryer, refrigerator, air-conditioning, elevators etc. can make the input impedance of power circuit carrier channel change, loaded impedance emulation module can emulation produce the impact of corresponding electric appliance load on the input impedance of power circuit carrier channel under the control of microprocessor, main website controls software control input impedance change-over switch, the dissimilar amount of impact is introduced to test loop, test respectively the impact of these amounts of impact on carrier communication.
(6) transistroute emulation module: the impact of the change of emulation testing communication speed, the relaying degree of depth on carrier communication.By main website, control communication baud rate between software change carrier wave instrument, the bit error rate and the success ratio of test copy reading data when different baud rate communication.The repeater that adds varying number between carrier wave instrument, tests the impact of the different relaying degree of depth on carrier communication.
(7) reactive-load compensation emulation module: reactive-load compensation meeting changes the power factor of power circuit, the Reactive Compensation Mode that reactive-load compensation emulation module can artificial actual changes power factor and the impact on carrier communication of test loop.
(8) control the control system of above-mentioned test cell and emulation module: by microprocessor, serial server, each unit control circuit, bottom embedded Control software, formed, each test cell circuit and emulation module are controlled.
(9) proving installation main website platform and control software: main website server and application software.
(10) test product group: comprise electric energy meter, collector, concentrator and low-voltage collecting meter reading system.
(11) power supply: comprise purified voltage stabilized power source and program control three phase sources, purified voltage stabilized power source provides the power supply after purifying and pressure stabilizing for proving installation.Program control three phase sources provides corresponding power supply and load current for proving installation.
Claims (7)
1. a laboratory simulation detection device for low-voltage meter reading system, is characterized in that: it comprises power supply, test product group, equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and for controlling the control system of above-mentioned test cell and emulation module, described test product group comprises the electric energy meter that communication successively connects, collector, concentrator, described test product group and described equipment basic parameter test cell, carrier transmit test cell, receiving sensitivity test cell, Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and control system are electrically connected to, described power supply and described Jamming Signal Simulation module, transistroute emulation module, reactive-load compensation emulation module, line impedance emulation module and control system are electrically connected to, and above-mentioned each test cell and emulation module are all electrically connected to control system and transfer data to proving installation main website platform by this control system.
2. laboratory simulation detection device for low-voltage meter reading system according to claim 1, it is characterized in that: described equipment basic parameter test cell comprises that power consumption test circuit, frequency-selecting and level detecting circuit, basic communication function detecting unit, relay function detect and data retransmission Function detection circuit, described power consumption test circuit comprises voltage sample module, current sample module, electric energy computation chip and CPU, described voltage sample module is connected with described electric energy computation chip with current sample module and after connecing, and described electric energy computation chip connects CPU.
3. laboratory simulation detection device for low-voltage meter reading system according to claim 2, it is characterized in that: described frequency-selecting and level detecting circuit comprise tested instrument, selecive level meter and processor, described selecive level meter is electrically connected to processor, and described tested instrument is connected with alternating current 220V voltage with filtering circuit by gating with selecive level meter.
4. laboratory simulation detection device for low-voltage meter reading system according to claim 2, it is characterized in that: described relay function detects and data retransmission Function detection circuit comprises subcarrier instrument, carrier signal attenuator, tested carrier wave instrument and K switch 1, K switch 2, after described subcarrier instrument, carrier signal attenuator, tested carrier wave instrument are connected successively and be connected to proving installation main website platform, described K switch 1 is in parallel with described carrier signal attenuator, and described K switch 2 is in parallel with described tested carrier wave instrument.
5. laboratory simulation detection device for low-voltage meter reading system according to claim 4, it is characterized in that: described receiving sensitivity test cell comprise carrier signal generator, can adjusting carrier signal attenuator and electronic switch, described carrier signal generator, can adjusting carrier signal attenuator, electronic switch is electrically connected to successively, described electronic switch has a plurality of output ports can select to be connected in described tested carrier wave instrument.
6. laboratory simulation detection device for low-voltage meter reading system according to claim 1, it is characterized in that: described Jamming Signal Simulation module comprises microprocessor, undesired signal generator, selector switch, described microprocessor, undesired signal generator, selector switch connect successively, and the undesired signal that described undesired signal generator can send various electrical equipment is connected on the PLC network of described electric energy meter, collector, concentrator through selector switch.
7. laboratory simulation detection device for low-voltage meter reading system according to claim 1, it is characterized in that: described line impedance emulation module comprises microprocessor, loaded impedance emulation module, selector switch, described microprocessor, loaded impedance emulation module, selector switch connect successively, and the impedance signal of the various electrical equipment that described loaded impedance emulation module simulates is connected on the PLC network of described electric energy meter, collector, concentrator through selector switch.
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