CN102590657A - Communication capacity test device of intelligent carrier electrical energy meters and test method thereof - Google Patents
Communication capacity test device of intelligent carrier electrical energy meters and test method thereof Download PDFInfo
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- CN102590657A CN102590657A CN201210009922XA CN201210009922A CN102590657A CN 102590657 A CN102590657 A CN 102590657A CN 201210009922X A CN201210009922X A CN 201210009922XA CN 201210009922 A CN201210009922 A CN 201210009922A CN 102590657 A CN102590657 A CN 102590657A
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Abstract
The invention discloses a communication capacity test device of intelligent carrier electrical energy meters and a test method thereof. The communication capacity test device comprises a computer, a test table body and a concentrator mounted on the test table body; four attenuators and five standard carrier electrical energy meters are mounted on the test table body; the current output end of a test power source is connected in series with the current end of the electrical energy meters through relays, and the voltage output end of the test power source supplies voltage to the electrical energy meters through a multipath isolation voltage mutual inductor which is provided with a bypass relay; and the attenuator and the relay are connected between the voltage ends of each two adjacent electrical energy meters. The attenuation of each attenuator to signals is equal to the attenuation of transmitting a carrier in an actual route for 500 m. The test method comprises a carrier attenuation test, a relay transmission test and a combined carrier attenuation and relay transmission test. With the adoption of the test device and the test method provided by the invention, a test system in a lab is completed aiming to the outstanding problems occurring in situ, so that a test result is accurate and reliable, and an entire structure is simpler.
Description
Technical field
The present invention relates to a kind of power test method and apparatus, especially a kind of single, three-phase intelligent carrier electric energy meter ability to communicate laboratory test device and method thereof.
Background technology
Low-voltage powerline carrier communication has become the main communication mode that State Grid Corporation of China builds the power information acquisition system; This technology need not be transformed existing electrical network; Only need special carrier communication chip be installed, accomplish the work of checking meter thereby carry out carrier communication with regard to ready-made line of electric force capable of using at concentrator and each electric power meter end.The carrier communication chip directly is installed in the existing carrier power meter; But carrier power meter all need be tested and verifies before use its carrier communication function; This test and checking possibly carried out in the laboratory, also possibly be included in the field adjustable process and carry out.Otherwise when carrier communication can not normally be carried out, just can't decision problem belonging to, broke down because this both possibly be an electric energy meter, also possibly be that circuit goes wrong, and particularly ammeter brings out existing fault, tends to cause can not get useful power information.And the problem of ammeter end possibly be just to exist before dispatching from the factory, and also possibly be to use to cause in the process, often is difficult to distinguish.
The single-phase isolation PT of traditional single-phase carrier test device has very big influence to carrier wave, and test result is also inaccurate, based on the problems referred to above, presses for a kind of carrier communication function test method and instrument, is used for the lab investigation of intelligent carrier electric energy meter before dispatching from the factory.
Summary of the invention
The technical matters that the present invention will solve provide a kind of can be to the proving installation and the method for testing thereof of the carrier communication function chamber of experimentizing of intelligent carrier electric energy meter checking, it is relatively simple for structure, and is easy to use during test.
For solving the problems of the technologies described above; The technical scheme that the present invention taked is: a kind of intelligent carrier electric energy meter ability to communicate proving installation; Comprise computing machine, test stage body and be installed in the concentrator on the test stage body that on the test stage body testing power supply is installed, concentrator is connected on the voltage output end of testing power supply; Automatic meter reading system management software and testing power supply Control Software are installed on the computing machine, and computing machine is connected with testing power supply with concentrator respectively; Its gordian technique is: four attenuators and five standard carrier electric energy meters also are installed on the said test stage body; The current terminal of said five standard carrier electric energy meters is connected on the current output terminal of testing power supply successively; And be connected to relay between the current terminal of adjacent two standard carrier electric energy meters, also be connected to relay between the current terminal of first standard carrier electric energy meter and the current output terminal of testing power supply; The voltage output end of said testing power supply connects the voltage end of five standard carrier electric energy meters respectively through the multichannel isolated voltage transformer; And be connected to attenuator and relay between the voltage end of adjacent two standard carrier electric energy meters, also be connected with bypass relay on the multichannel isolated voltage transformer its bypass.
Above-mentioned attenuator is made up of first to the 3rd power choke coil T1-T3, capacitor C 1, C2 and inductance L 1, L2; Capacitor C 2, inductance L 2 and capacitor C 1, inductance L 1 are formed two-stage 120K series resonance respectively.
Above-mentioned test stage body is single-phase test stage body or three-phase test stage body, and corresponding, said standard carrier electric energy meter is single-phase carrier electric energy meter of standard or standard three-phase carrier electric energy meter.
After above-mentioned single-phase test stage body and three-phase test stage body is parallelly connected, be connected with testing power supply through hand switch.
The present invention's intelligence carrier electric energy meter ability to communicate method of testing adopts above-mentioned proving installation, and it may further comprise the steps:
(1) carrier wave attenuation test:
1.1) utilize relay that the current output terminal of standard carrier electric energy meter from testing power supply broken off, utilize of the multichannel isolated voltage transformer bypass of bypass relay with the testing power supply voltage output end;
1.2) tested electric energy meter is connected on respectively on the position of first to fourth attenuator standard carrier electric energy meter afterwards successively; Utilize automatic meter reading system management software on the computing machine to test tested electric energy meter respectively through after 500 meters, 1000 meters, 1500 meters and the 2000 meters carrier waves decay; Whether its information about power can successfully be copied back; If tested electric energy meter is successively through after other decay of above-mentioned four levels; Its information about power can both successfully be copied back, explains that then the carrier communication performance of tested electric energy meter is normal; Otherwise, tested electric energy meter existing problems are described;
(2) relaying transmitted test:
2.1) utilize relay to break off four attenuators between the electric energy meter voltage end; Utilize relay to connect the circuit between the current output terminal of five carrier electric energy meters and testing power supply; And; Close the bypass relay, make the standard carrier electric energy meter connect the voltage output end of testing power supply through the multichannel isolated voltage transformer;
2.2) be connected to tested electric energy meter on the position of second to the 5th standard carrier electric energy meter successively respectively; Corresponding simultaneously; Utilize the automatic meter reading system management software respectively first to fourth standard carrier electric energy meter to be set to one-level to level Four relaying and transmit ammeter; After transmitting through above-mentioned level Four relaying respectively, whether can successfully copy back the information about power that utilizes the automatic meter reading system management software to test tested electric energy meter then, if after tested electric energy meter was transmitted through above-mentioned level Four relaying successively, its information about power can both successfully be copied back; After then explanation is transmitted through one-level to level Four relaying; Tested electric energy meter carrier communication performance is normal, otherwise, tested electric energy meter existing problems are described;
(3) the carrier wave decay is transmitted the acting in conjunction test with relaying:
3.1) utilize relay that the current output terminal of standard carrier electric energy meter from testing power supply broken off, utilize of the multichannel isolated voltage transformer bypass of bypass relay with the testing power supply voltage output end;
3.2) tested electric energy meter is connected on respectively on the position of first to fourth attenuator standard carrier electric energy meter afterwards successively; Corresponding simultaneously; Utilize the automatic meter reading system management software respectively first to fourth standard carrier electric energy meter to be set to one-level to level Four relaying and transmit ammeter; Whether the information about power that utilizes the automatic meter reading system management software to test tested electric energy meter then can successfully be copied back after transmitting through above-mentioned level Four decay, level Four relaying respectively; If information about power can both successfully be copied back, after then explanation decayed through the forwarding of one-level to level Four relaying, one-level to level Four carrier wave, tested electric energy meter carrier communication performance was normal; Otherwise, tested electric energy meter existing problems are described.
Above-mentioned attenuator is made up of first to the 3rd power choke coil T1-T3, capacitor C 1, C2 and inductance L 1, L2; Capacitor C 2, inductance L 2 and capacitor C 1, inductance L 1 are formed two-stage 120K series resonance respectively; Each attenuator is equivalent to carrier wave transmits 500 meters distances in actual track damping capacity to the damping capacity of signal.
Above-mentioned standard carrier electric energy meter is single-phase carrier electric energy meter of standard or standard three-phase carrier electric energy meter.
Adopt the beneficial effect that technique scheme produced to be: 1) proving installation of the present invention designs according to the Principle of Communication of power line carrier and the principle of work of carrier wave attenuator; It has carried out the repacking design on the basis of traditional electric energy meter proving installation; Consider the influence of the single-phase isolation PT of traditional single phase proving installation to carrier wave; This device has been carried out special processing; Attenuator is joined in the proving installation, and each attenuator is equivalent to carrier wave transmits 500 meters distances in actual track damping capacity to the damping capacity of signal, so the present invention can test electric energy meter respectively through the carrier communication ability after 500 meters, 1000 meters, 1500 meters and the decay of 2000 meters carrier waves; Test result accurately and reliably, and one-piece construction is fairly simple.
2) this method of testing combines lab investigation and rig-site utilization; Outstanding problem to occurring is at the scene improved laboratory testing system; Prevent that with lab investigation problem from taking place in using at the scene once again, thereby promote effective raising of modern marketing coulomb collection system practicability level.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is the structural principle block diagram of proving installation of the present invention;
Fig. 2 is the wiring schematic diagram of the single-phase proving installation of the present invention;
Fig. 3 is the wiring schematic diagram of three-phase proving installation of the present invention;
Fig. 4 is the circuit diagram of attenuator of the present invention;
Fig. 5 is the FB(flow block) of method of testing of the present invention.
Embodiment
Referring to accompanying drawing 1; The present invention's intelligence carrier electric energy meter ability to communicate proving installation comprises computing machine, test stage body and is installed in the concentrator on the test stage body; On the test stage body testing power supply is installed; Concentrator is connected on the voltage output end of testing power supply, automatic meter reading system management software and testing power supply Control Software commonly used at present are installed on the computing machine, and computing machine is connected with testing power supply with concentrator respectively; Four attenuators and five standard carrier electric energy meters also are installed on the said test stage body; The current terminal of said five standard carrier electric energy meters is connected on the current output terminal of testing power supply successively; And be connected to relay between the current terminal of adjacent two standard carrier electric energy meters, also be connected to relay between the current terminal of first standard carrier electric energy meter and the current output terminal of testing power supply; The voltage output end of said testing power supply connects the voltage end of five standard carrier electric energy meters respectively through the multichannel isolated voltage transformer; And be connected to attenuator and relay between the voltage end of adjacent two standard carrier electric energy meters, also be connected with bypass relay on the multichannel isolated voltage transformer its bypass.
Referring to accompanying drawing 4, it is the circuit diagram of attenuator of the present invention, and attenuator is made up of first to the 3rd power choke coil T1-T3, capacitor C 1, C2 and inductance L 1, L2; Capacitor C 2, inductance L 2 and capacitor C 1, inductance L 1 are formed two-stage 120K series resonance respectively.Each attenuator is equivalent to carrier wave transmits 500 meters distances in actual track damping capacity to the damping capacity of signal.
Said test stage body is single-phase test stage body or three-phase test stage body, and corresponding, said standard carrier electric energy meter is single-phase carrier electric energy meter of standard or standard three-phase carrier electric energy meter.
After said single-phase test stage body and three-phase test stage body is parallelly connected, be connected with testing power supply through hand switch.On single-phase test stage body and the three-phase test stage body three-phase voltage and three-phase current only are provided.Single-phase test stage body and three-phase test stage body can not use simultaneously, and the voltage and current of two stage bodies all adopts the mode of parallel connection.Two stage bodies are selected to be to use single-phase stage body also to be to use the three-phase stage body through hand switch, when using single-phase stage body, cut off the voltage circuit on the three-phase stage body, and the three-phase current of three-phase stage body must cut off the road simultaneously.The three-phase current that when using the three-phase stage body, cuts off the single-phase stage body of voltage circuit while on the single-phase stage body must cut off.
Referring to accompanying drawing 2, wherein, D1 is the single-phase carrier electric energy meter of standard, and J1, J2 are relay, and S2 is an attenuator, and T4 is the multichannel isolated voltage transformer, and relay among the figure and bypass relay all receive computer control.Adopt three-phase testing power supply S1, three-phase testing power supply S1 receives the control of power supply Control Software on the computing machine through the RS-232 mouth.Supply current is exported the rated current of tested carrier electric energy meter, or gets final product less than the maximum current of tested carrier electric energy meter.
During test, tested electric energy meter need be connected on respectively on the position of five single-phase tables of second single-phase table to the, or is connected in parallel with it.The carrier signal of tested electric energy meter is to produce through the carrier module on the tested electric energy meter, is to be transferred to concentrator through the pressure-wire between table and the table, and same concentrator also passes to table through pressure-wire with carrier signal.
During the carrier wave attenuation test; Promptly when using attenuator; The influence of multichannel isolated voltage transformer on the single-phase test stage body; Need the voltage circuit of standard carrier electric energy meter from the multichannel isolated voltage transformer be broken through the bypass relay, directly the B phase voltage output port from the testing power supply is introduced voltage and is added on the electric energy meter.The break-make of relay J 1 and J2 may command each several part circuit, when using attenuator, need be with the switch closure of relay J 1 expression, and break off the switch of relay J 2 expressions; When not using attenuator, need be with the switch closure of relay J 2 expression, and break off the switch of relay J 1 expression.
Referring to accompanying drawing 3, the D2 among the figure is a standard three-phase carrier electric energy meter, and the connected mode of three-phase testing power supply S1 and standard three-phase carrier electric energy meter D2 and method of testing and above-described single-phase proving installation are similar.
Referring to accompanying drawing 5, it is the FB(flow block) of intelligent carrier electric energy meter ability to communicate method of testing of the present invention, and this method of testing may further comprise the steps:
(1) carrier wave attenuation test:
1.1) utilize relay that the current output terminal of standard carrier electric energy meter from testing power supply broken off, utilize of the multichannel isolated voltage transformer bypass of bypass relay with the testing power supply voltage output end;
1.2) tested electric energy meter is connected on respectively on the position of first to fourth attenuator standard carrier electric energy meter afterwards successively; Utilize automatic meter reading system management software on the computing machine to test tested electric energy meter respectively through after 500 meters, 1000 meters, 1500 meters and the 2000 meters carrier waves decay; Whether its information about power can successfully be copied back; If tested electric energy meter is successively through after other decay of above-mentioned four levels; Its information about power can both successfully be copied back, explains that then the carrier communication performance of tested electric energy meter is normal; Otherwise, tested electric energy meter existing problems are described;
(2) relaying transmitted test:
2.1) utilize relay to break off four attenuators between the electric energy meter voltage end; Utilize relay to connect the circuit between the current output terminal of five carrier electric energy meters and testing power supply; And; Close the bypass relay, make the standard carrier electric energy meter connect the voltage output end of testing power supply through the multichannel isolated voltage transformer;
2.2) be connected to tested electric energy meter on the position of second to the 5th standard carrier electric energy meter successively respectively; Corresponding simultaneously; Utilize the automatic meter reading system management software respectively first to fourth standard carrier electric energy meter to be set to one-level to level Four relaying and transmit ammeter; After transmitting through above-mentioned level Four relaying respectively, whether can successfully copy back the information about power that utilizes the automatic meter reading system management software to test tested electric energy meter then, if after tested electric energy meter was transmitted through above-mentioned level Four relaying successively, its information about power can both successfully be copied back; After then explanation is transmitted through one-level to level Four relaying; Tested electric energy meter carrier communication performance is normal, otherwise, tested electric energy meter existing problems are described;
(3) the carrier wave decay is transmitted the acting in conjunction test with relaying:
3.1) utilize relay that the current output terminal of standard carrier electric energy meter from testing power supply broken off, utilize of the multichannel isolated voltage transformer bypass of bypass relay with the testing power supply voltage output end;
3.2) tested electric energy meter is connected on respectively on the position of first to fourth attenuator standard carrier electric energy meter afterwards successively; Corresponding simultaneously; Utilize the automatic meter reading system management software respectively first to fourth standard carrier electric energy meter to be set to one-level to level Four relaying and transmit ammeter; Whether the information about power that utilizes the automatic meter reading system management software to test tested electric energy meter then can successfully be copied back after transmitting through above-mentioned level Four decay, level Four relaying respectively; If information about power can both successfully be copied back, after then explanation decayed through the forwarding of one-level to level Four relaying, one-level to level Four carrier wave, tested electric energy meter carrier communication performance was normal; Otherwise, tested electric energy meter existing problems are described.
Claims (7)
1. intelligent carrier electric energy meter ability to communicate proving installation; Comprise computing machine, test stage body and be installed in the concentrator on the test stage body; On the test stage body testing power supply is installed; Concentrator is connected on the voltage output end of testing power supply, and automatic meter reading system management software and testing power supply Control Software are installed on the computing machine, and computing machine is connected with testing power supply with said concentrator respectively;
It is characterized in that: four attenuators and five standard carrier electric energy meters also are installed on the said test stage body; The current terminal of said five standard carrier electric energy meters is connected on the current output terminal of testing power supply successively; And be connected to relay between the current terminal of adjacent two standard carrier electric energy meters, also be connected to relay between the current terminal of first standard carrier electric energy meter and the current output terminal of testing power supply; The voltage output end of said testing power supply connects the voltage end of five standard carrier electric energy meters respectively through the multichannel isolated voltage transformer; And be connected to attenuator and relay between the voltage end of adjacent two standard carrier electric energy meters, also be connected with bypass relay on the multichannel isolated voltage transformer its bypass.
2. intelligent carrier electric energy meter ability to communicate proving installation according to claim 1, it is characterized in that: said attenuator is made up of first to the 3rd power choke coil T1-T3, capacitor C 1, C2 and inductance L 1, L2; Capacitor C 2, inductance L 2 and capacitor C 1, inductance L 1 are formed two-stage 120K series resonance respectively.
3. intelligent carrier electric energy meter ability to communicate proving installation according to claim 1; It is characterized in that: said test stage body is single-phase test stage body or three-phase test stage body; Accordingly, said standard carrier electric energy meter is single-phase carrier electric energy meter of standard or standard three-phase carrier electric energy meter.
4. intelligent carrier electric energy meter ability to communicate proving installation according to claim 3 is characterized in that: after said single-phase test stage body and three-phase test stage body is parallelly connected, be connected with testing power supply through hand switch.
5. intelligent carrier electric energy meter ability to communicate method of testing, it is characterized in that: adopt above-mentioned proving installation, it may further comprise the steps:
(1) carrier wave attenuation test:
1.1) utilize relay that the current output terminal of standard carrier electric energy meter from testing power supply broken off, utilize of the multichannel isolated voltage transformer bypass of bypass relay with the testing power supply voltage output end;
1.2) tested electric energy meter is connected on respectively on the position of first to fourth attenuator standard carrier electric energy meter afterwards successively; Utilize automatic meter reading system management software on the computing machine to test tested electric energy meter respectively through after 500 meters, 1000 meters, 1500 meters and the 2000 meters carrier waves decay; Whether its information about power can successfully be copied back; If tested electric energy meter is successively through after other decay of above-mentioned four levels; Its information about power can both successfully be copied back, explains that then the carrier communication performance of tested electric energy meter is normal; Otherwise, tested electric energy meter existing problems are described;
(2) relaying transmitted test:
2.1) utilize relay to break off four attenuators between the electric energy meter voltage end; Utilize relay to connect the circuit between the current output terminal of five carrier electric energy meters and testing power supply; And; Close the bypass relay, make the standard carrier electric energy meter connect the voltage output end of testing power supply through the multichannel isolated voltage transformer;
2.2) be connected to tested electric energy meter on the position of second to the 5th standard carrier electric energy meter successively respectively; Corresponding simultaneously; Utilize the automatic meter reading system management software respectively first to fourth standard carrier electric energy meter to be set to one-level to level Four relaying and transmit ammeter; After transmitting through above-mentioned level Four relaying respectively, whether can successfully copy back the information about power that utilizes the automatic meter reading system management software to test tested electric energy meter then, if after tested electric energy meter was transmitted through above-mentioned level Four relaying successively, its information about power can both successfully be copied back; After then explanation is transmitted through one-level to level Four relaying; Tested electric energy meter carrier communication performance is normal, otherwise, tested electric energy meter existing problems are described;
(3) the carrier wave decay is transmitted the acting in conjunction test with relaying:
3.1) utilize relay that the current output terminal of standard carrier electric energy meter from testing power supply broken off, utilize of the multichannel isolated voltage transformer bypass of bypass relay with the testing power supply voltage output end;
3.2) tested electric energy meter is connected on respectively on the position of first to fourth attenuator standard carrier electric energy meter afterwards successively; Corresponding simultaneously; Utilize the automatic meter reading system management software respectively first to fourth standard carrier electric energy meter to be set to one-level to level Four relaying and transmit ammeter; Whether the information about power that utilizes the automatic meter reading system management software to test tested electric energy meter then can successfully be copied back after transmitting through above-mentioned level Four decay, level Four relaying respectively; If information about power can both successfully be copied back, after then explanation decayed through the forwarding of one-level to level Four relaying, one-level to level Four carrier wave, tested electric energy meter carrier communication performance was normal; Otherwise, tested electric energy meter existing problems are described.
6. intelligent carrier electric energy meter ability to communicate method of testing according to claim 5, it is characterized in that: said attenuator is made up of first to the 3rd power choke coil T1-T3, capacitor C 1, C2 and inductance L 1, L2; Capacitor C 2, inductance L 2 and capacitor C 1, inductance L 1 are formed two-stage 120K series resonance respectively; Each attenuator is equivalent to carrier wave transmits 500 meters distances in actual track damping capacity to the damping capacity of signal.
7. intelligent carrier electric energy meter ability to communicate method of testing according to claim 5 is characterized in that: said standard carrier electric energy meter is single-phase carrier electric energy meter of standard or standard three-phase carrier electric energy meter.
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| CN106341160A (en) * | 2016-08-23 | 2017-01-18 | 杭州海兴电力科技股份有限公司 | Low-voltage power line carrier network laboratory test device and low-voltage power line carrier network laboratory test method |
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Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20121220 Owner name: STATE GRID CORPORATION OF CHINA HEBEI ELECTRIC POW Effective date: 20121220 |
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