CN211744462U - Low pressure collection is copied testing arrangement based on HPLC - Google Patents
Low pressure collection is copied testing arrangement based on HPLC Download PDFInfo
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- CN211744462U CN211744462U CN202020917038.6U CN202020917038U CN211744462U CN 211744462 U CN211744462 U CN 211744462U CN 202020917038 U CN202020917038 U CN 202020917038U CN 211744462 U CN211744462 U CN 211744462U
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Abstract
The utility model relates to a testing arrangement is copied to low pressure collection based on HPLC, including main website, concentrator and the electric energy meter that connects gradually, the concentrator is connected with programme-controlled source, concentrator and electric energy meter between have connected gradually signal coupler and adjustable attenuator, signal coupler be connected with arbitrary function generator, the electric energy meter include a plurality of three-phase electric energy meters and single-phase electric energy meter, concentrator, three-phase electric energy meter and single-phase electric energy meter connect gradually, single-phase electric energy meter be connected with adjustable load. Compared with the prior art, the utility model has the advantages of occupation space is little, the accuracy is high and easy operation.
Description
Technical Field
The utility model relates to a power consumption information acquisition system test technique especially relates to a testing arrangement is copied to low pressure collection based on HPLC.
Background
At present, domestic power grid companies tend to adopt an intelligent power utilization service system, the system can meet the requirements of full coverage, full collection and full prepayment, realize real-time collection of electric energy information, provide basic data and information for charging, business and customer service, form closed-loop management of the whole marketing service, provide technical means for realizing stepped power price or time-of-use power price, effectively combine the national basic national policy in specific work, run through a communication network platform deep at the tail end of a power grid, and lay a solid foundation for marketing automation, distribution network automation and demand side management.
The electricity consumption information acquisition system generally comprises a main station, a remote transmission communication channel and a local data acquisition channel, the realization of electricity consumption information acquisition mainly depends on the selection of the communication channel, and a two-stage communication mode is generally adopted in the communication mode: the first is a remote transmission channel, which refers to a communication mode from a concentrator to a master station; and the other is a local data acquisition channel, namely a communication mode from the concentrator to the collector or the electric energy meter. In the electricity consumption information acquisition system, the remote transmission channel generally adopts the modes of public networks, optical fibers, wireless private networks and the like, and can basically meet the actual requirements. The local data acquisition channel is developed by a broadband carrier (HPLC) technology along with the application and the deepened popularization of the power utilization information acquisition system, and the broadband carrier is free of wiring and simple to implement and is popularized vigorously. However, the communication effect of the broadband carrier module is easily interfered by power grid noise and external shielding, so that the influence of the external on the broadband carrier module needs to be mainly tested.
The prior art also provides some solutions, chinese patent CN209120178U proposes a broadband HPLC communication unit anti-attenuation performance test system, which includes a first shielding box, a radio frequency line connection unit and a second shielding box, where the first shielding box includes a first UPS power supply, an I-type concentrator, an HPLC master node communication module and a first isolation coupling unit, the second shielding box includes a second UPS power supply, an electric energy meter, an HPLC ii-type collector and a second isolation coupling unit, the radio frequency line connection unit includes a first fixed attenuator, an adjustable attenuator and a second fixed attenuator which are connected in sequence, and the patent introduces an AC220V power supply, which can more truly reflect the anti-attenuation performance of the broadband HPLC communication unit composed of the HPLC master node communication module and the HPLC ii-type collector in a scene of field application, and simplifies the test structure and is simple to operate.
However, the application of the patent can only test the anti-attenuation capability of the HPLC communication unit, but cannot test the anti-noise capability, the noise interference brought by the power line as the communication medium in the HPLC technology is far larger than that of the telecommunication line, and especially, the burst noise has higher level and has stronger influence on the HPLC communication.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a testing arrangement is copied to low pressure collection based on HPLC in order to overcome the defect that above-mentioned prior art exists, occupation space is little, and the accuracy is high, easy operation.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a testing arrangement is copied to low pressure collection based on HPLC, is including the main website, concentrator and the electric energy meter that connect gradually, and the concentrator is connected with programme-controlled source, concentrator and electric energy meter between connect gradually signal coupler and adjustable attenuator, signal coupler be connected with arbitrary function generator, the electric energy meter include a plurality of three-phase electric energy meters and single-phase electric energy meter, concentrator, three-phase electric energy meter and single-phase electric energy meter connect gradually, single-phase electric energy meter be connected with adjustable load.
Further, the device also comprises an electric energy meter frame, and the electric energy meter and the concentrator are arranged on the position of the electric energy meter frame.
Furthermore, the electric energy meter rack comprises a plurality of three-phase electric energy meter racks and a single-phase electric energy meter rack.
Furthermore, the three-phase electric energy meter frame is provided with a plurality of rows of epitopes, each row of epitopes comprises a plurality of electric energy epitopes and 1 concentrator epitope, and each row of electric energy epitopes is connected with 1 adjustable attenuator.
Furthermore, a plurality of rows of epitopes are arranged on the single-phase electric energy meter frame, each row of epitopes comprises a plurality of electric energy epitopes, and each row of electric energy epitopes is connected with 1 adjustable attenuator.
Furthermore, a working indicator light is arranged on the epitope.
Furthermore, a 485 interface is arranged on the epitope.
Furthermore, a relay is connected between each concentrator and the program control source.
Furthermore, the device also comprises a shielding case, and the electric energy meter is arranged in the shielding case.
Furthermore, an RS485 interface is arranged on the adjustable attenuator.
Compared with the prior art, the utility model discloses have with following beneficial effect:
(1) the utility model discloses the main website that connects gradually, concentrator and electric energy meter, the concentrator is connected with programme-controlled source, signal coupler and adjustable attenuator have connected gradually between concentrator and the electric energy meter, the circuit decay in the communication line can be simulated to the adjustable attenuator, signal coupler is connected with arbitrary function generator, can send the noise signal of appointed wave form, the influence of noise in the circuit in the simulation actual application to the broadband carrier wave, the electric energy meter includes a plurality of three-phase electric energy meters and single-phase electric energy meter, the concentrator, three-phase electric energy meter and single-phase electric energy meter connect gradually, the simplifying device, lay simply, save space, single-phase electric energy meter is connected with adjustable load, simulate the influence of the impedance load in the actual application to the broadband carrier wave through adjusting the load impedance of adjustable load;
(2) the utility model is provided with a plurality of three-phase electric energy meter frames and single-phase electric energy meter frames, which is convenient for centralized installation of the three-phase electric energy meter and the single-phase electric energy meter and is convenient for experiment;
(3) the utility model has 1 adjustable attenuator connected to each row of electric energy meter position on the three-phase electric energy meter frame and the single-phase electric energy meter frame, the attenuation between the rows can be freely combined, the adjusting range is large, and the experimental result is more accurate;
(4) the utility model has the advantages that the relay is connected between each concentrator and the voltage terminal of the program control source, the meter position of each concentrator is only connected with the voltage terminal of the program control source, the serial reading of a plurality of concentrators in the same area is prevented, the reading switching of the concentrators is realized, and the operation is simple;
(5) the utility model discloses still be equipped with the shield cover, the electric energy meter increases absorbing material in arranging the shield cover in, avoids the influence of space radiation to carrier communication in the shield cover.
Drawings
FIG. 1 is a structural frame diagram of the present invention;
fig. 2 is a circuit diagram of an adjustable attenuator.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The utility model provides a testing arrangement is copied to low pressure collection based on HPLC, as figure 1, including the main website that connects gradually, concentrator and electric energy meter, the concentrator is connected with programme-controlled source, signal coupler and adjustable attenuator have connected gradually between concentrator and the electric energy meter, signal coupler is connected with arbitrary function generator, can send the noise signal of appointed wave form, noise in the circuit among the simulation actual application is to the influence of broadband carrier, adjustable attenuator can simulate the circuit decay among the communication line, the electric energy meter includes a plurality of three-phase electric energy meters and single-phase electric energy meter, the concentrator, three-phase electric energy meter and single-phase electric energy meter connect gradually, single-phase electric energy meter is connected with adjustable load.
The low-voltage meter reading test device is also provided with 1 three-phase electric energy meter frame and 4 single-phase electric energy meter frames; the three-phase electric energy meter rack is a positive and negative surface hanging meter rack, each surface is provided with 3 rows of meter positions, each row of 6 meter positions and two surfaces have 36 meter positions, each meter position is provided with a working indicator light and a 485 interface, the working state of the three-phase electric energy meter is conveniently indicated and data is conveniently read, each row of meter positions comprises a plurality of electric energy meter positions and 1 concentrator meter position, each row of electric energy meter positions is connected with 1 adjustable attenuator, the electric energy meter positions are compatible with the three-phase mutual inductance meter and the three-phase direct connection meter, and the respective attenuations of each row can be freely combined and adjusted; the single-phase electric energy meter frame is positive and negative table frame of hanging, and every side is equipped with 3 rows of epitopes, and every row includes 6 epitopes, and every row of epitope is connected with 1 adjustable attenuator, and epitope current short circuit relies on the circuit short circuit.
Because the communication rate of broadband carrier is higher, concentrator and three-phase electric energy meter are on same three-phase electric energy meter frame, the distance between the two is shorter, can not directly couple to the carrier module of concentrator through space coupling through the power line to the broadband carrier wave ammeter, in order to prevent space coupling, all cables all adopt the shielded wire, every three-phase electric energy meter and single-phase electric energy meter are equipped with the shield cover outward, increase absorbing material in the shield cover, avoid the influence of space radiation to carrier communication.
Each concentrator epitope is only connected with a voltage terminal of the program control source, and a relay is connected between each concentrator and the voltage terminal of the program control source, so that the serial reading of a plurality of concentrators in the same region is prevented, and the reading switching of the concentrators is realized.
The adjustable attenuator is an important device for testing power line carrier communication equipment, can detect performance parameters of the carrier communication device, such as transmission intensity, transmission efficiency, receiving sensitivity and the like, and can be used for detecting the noise resistance and anti-interference capability, and also can be used for realizing a controllable network relay relation in networking test, the attenuation value can be adjusted through the component value, the design is 2-70dB adjustable, the communication mode is RS485, namely the adjustable range of the attenuation value of the first row of the epitope of the three-phase electric energy meter frame is 2-70dB, the adjustable range of the second row is 4-140dB, the step is 2dB, by analogy, the circuit principle of the attenuator is shown in fig. 2, and includes 2 identical inductors and 2 identical capacitors, wherein 1 capacitor is connected to one end of 2 inductors, and the other capacitor is connected to the other end of 2 inductors, and the calculation formula is:
wherein, U0And UiThe voltages across the two capacitors are respectively, and L and C are the capacitance of the capacitor and the inductance of the inductor respectively.
Take 50dB attenuation as an example, when f is 9.5 MHz;
LC≈1558×10-14
a 50dB attenuation corresponds to a line attenuation of 1000m, and the attenuation factor is modeled by adjusting L and C.
The noise characteristic is taken as 1 important characteristic of a power line channel, has stronger influence on low-voltage power line carrier communication, the noise interference brought by the power line as a communication medium is far larger than that of a telecommunication line, the noise ratio generated by free discharge corona, insulator pollution flashover discharge, switching operation and the like on a high-voltage power line is larger, particularly, burst noise has higher level, and has stronger influence on the low-voltage power line carrier communication, the communication environment under a laboratory environment is single, in order to simulate the influence of the actual complex environment on the impedance of the power line channel on the communication performance, a noise coupler is connected into the power line, one end of the noise coupler is connected with a 30M arbitrary function generator through a BNC interface, the other end of the noise coupler is connected with the power line through a strong electric power terminal, and the influence of noise in the line on a broadband carrier in the actual application is simulated through the coupling noise of the power line carrier, the 30M arbitrary function generator can not only send out a noise signal of a specified waveform, but also record and stack the on-site power grid noise waveform into a line, so as to simulate the on-site actual condition.
The low-voltage power line carrier communication is directly oriented to users, some electrical appliance loads are inevitably connected, the loads are relatively single in a laboratory environment, the influence of complex electrical environment on broadband carriers is not favorably explored, the influence on the power carrier when household appliances and industrial equipment are used is simulated through adjustable loads, and the influence of impedance loads in practical application on the broadband carriers is simulated through adjusting the load impedance of the adjustable loads.
The low-voltage meter reading test device simulates the electricity information acquisition process and the line attenuation, noise interference and station area crosstalk in the process, a typical interference noise model is applied between the concentrator and the three-phase electric energy meter through an arbitrary function generator and a noise coupler, performance parameters such as the transmission intensity, the transmission efficiency and the receiving sensitivity of carrier communication are detected, and the anti-noise and anti-interference capabilities are checked.
The embodiment provides a low pressure collection test device based on HPLC, can simulate the power consumption information acquisition process, and noise and line attenuation in the power supply line in the arbitrary function generator cooperation signal coupler, attenuator simulation field communication line, compact structure, occupation space is little, the precision is high, easy and simple to handle.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a testing arrangement is copied to low pressure collection based on HPLC, is including the main website, concentrator and the electric energy meter that connect gradually, the concentrator is connected with programme-controlled source, its characterized in that, concentrator and electric energy meter between connect gradually signal coupler and adjustable attenuator, signal coupler be connected with arbitrary function generator, the electric energy meter include a plurality of three-phase electric energy meters and a plurality of single-phase electric energy meters, concentrator, three-phase electric energy meter and single-phase electric energy meter connect gradually, single-phase electric energy meter be connected with adjustable load.
2. An HPLC-based low-voltage meter reading testing device according to claim 1, further comprising an electric energy meter frame, wherein the electric energy meter and the concentrator are arranged on an epitope of the electric energy meter frame.
3. An HPLC-based low-voltage meter reading testing device according to claim 2, wherein the electric energy meter rack comprises a plurality of three-phase electric energy meter racks and a single-phase electric energy meter rack.
4. An HPLC-based low-voltage meter reading testing device according to claim 3, wherein a plurality of rows of epitopes are arranged on the three-phase electric energy meter rack, each row of epitopes comprises a plurality of electric energy epitopes and 1 concentrator epitope, and each row of electric energy epitopes is connected with 1 adjustable attenuator.
5. An HPLC-based low-voltage meter reading testing device according to claim 3, wherein a plurality of rows of epitopes are arranged on the single-phase electric energy meter rack, each row of epitopes comprises a plurality of electric energy epitopes, and each row of electric energy epitopes is connected with 1 adjustable attenuator.
6. An HPLC-based low pressure centralized meter reading test device according to claim 2, wherein said epitope is provided with a working indicator light.
7. An HPLC-based low pressure centralized meter reading test device according to claim 2, wherein said epitope is provided with a 485 interface.
8. An HPLC-based low pressure manifold test apparatus according to claim 1, wherein a relay is connected between each concentrator and the programmable source.
9. An HPLC-based low pressure centralized meter reading test device according to claim 1, further comprising a shielding case, wherein said electric energy meter is placed in the shielding case.
10. An HPLC-based low-pressure meter reading test device according to claim 1, wherein an RS485 interface is arranged on the adjustable attenuator.
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| CN202020917038.6U CN211744462U (en) | 2020-05-26 | 2020-05-26 | Low pressure collection is copied testing arrangement based on HPLC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115840094A (en) * | 2022-12-20 | 2023-03-24 | 国网河南省电力公司电力科学研究院 | Method for constructing lateral audible noise model of power transmission corridor, microphone supporting device, and audible noise measuring apparatus |
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2020
- 2020-05-26 CN CN202020917038.6U patent/CN211744462U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115840094A (en) * | 2022-12-20 | 2023-03-24 | 国网河南省电力公司电力科学研究院 | Method for constructing lateral audible noise model of power transmission corridor, microphone supporting device, and audible noise measuring apparatus |
| CN115840094B (en) * | 2022-12-20 | 2023-10-03 | 国网河南省电力公司电力科学研究院 | Construction method of transverse audible noise model of power transmission corridor |
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