CN113810081A - Power distribution and utilization acquisition simulation system of HPLC of programmable attenuator - Google Patents
Power distribution and utilization acquisition simulation system of HPLC of programmable attenuator Download PDFInfo
- Publication number
- CN113810081A CN113810081A CN202111217094.4A CN202111217094A CN113810081A CN 113810081 A CN113810081 A CN 113810081A CN 202111217094 A CN202111217094 A CN 202111217094A CN 113810081 A CN113810081 A CN 113810081A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- power
- attenuation
- hplc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/48—Testing attenuation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention relates to the technical field of communication electronic systems, and discloses a power distribution and utilization acquisition simulation system of an HPLC (high performance liquid chromatography) of a programmable attenuator, which comprises a power grid simulation unit, a programmable attenuation module, a coupling filtering module, a signal generation module, a circuit breaker, a concentrator and a three-phase electric energy meter, wherein the coupling filtering module is respectively connected with the programmable attenuation module, the circuit breaker and the power grid simulation unit, the circuit breakers are mutually connected, a connecting line of the circuit breaker is respectively connected with the signal generation module, the concentrator and the three-phase electric energy meter, and the coupling filtering module is also connected with a plurality of electric energy meters in parallel; the grid simulation unit transforms the existing ac grid power supply into a stable, pure sine wave power supply of the required frequency. The invention utilizes the functions of carrier signal attenuation, noise interference and multi-level carrier topology identification in the environment of HPLC power consumption information acquisition which is close to reality by using a program control attenuation module, a coupling filtering module and a signal generation module.
Description
Technical Field
The invention relates to the technical field of communication electronic systems, in particular to a power distribution and utilization acquisition simulation system of an HPLC of a programmable attenuator.
Background
The low-voltage power line high-speed carrier communication (HPLC) is a unique and basic communication mode of a power system, and is a technology for carrying out high-speed transmission on an analog/digital signal by using an existing power line through a carrier mode, the power line is used as a network access scheme, the existing power distribution network is used for communication, rewiring is not needed, and the HPLC is widely applied to a power distribution and utilization acquisition system, but a voltage power line is not specially used for transmitting communication data.
At present, a common electricity consumption information acquisition system in a laboratory only tests conditions such as consistency, reliability and the like of HPLC communication under laboratory conditions, simulation of actual conditions is lacked, the communication level of carrier communication under an actual operation scene cannot be reflected, and meanwhile, a radio frequency weak current signal is accessed by a program control attenuation module and cannot be directly introduced into a 220V strong current environment of the electricity consumption information acquisition system.
Disclosure of Invention
The invention aims to provide a power distribution and utilization acquisition simulation system of an HPLC (high performance liquid chromatography) of a programmable attenuator, which utilizes a programmable attenuation module, a coupling filter module and a signal generation module to simulate the actual channel attenuation and noise interference of the HPLC communication in a power distribution and utilization acquisition environment, simulates the carrier signal attenuation, noise interference and multi-level carrier topology identification functions close to the actual condition of the HPLC power utilization information acquisition environment, and aims to solve the problems that the power utilization information acquisition system commonly used in a laboratory in the prior art only tests the conditions of consistency, reliability and the like of the HPLC communication under the laboratory condition, lacks the simulation of the actual condition and cannot reflect the communication level of the carrier communication in the actual operation scene.
The invention is realized in this way, the power distribution and utilization acquisition simulation system of the HPLC of the programmable attenuator comprises a power grid simulation unit, a programmable attenuation module, a coupling filter module, a signal generation module, a circuit breaker, a concentrator and a three-phase electric energy meter, wherein the coupling filter module is respectively connected with the programmable attenuation module, the circuit breaker and the power grid simulation unit, the circuit breakers are mutually connected, a connecting line of the circuit breaker is respectively connected with the signal generation module, the concentrator and the three-phase electric energy meter, and the coupling filter module is also connected with a plurality of electric energy meters in parallel; the power grid simulation unit converts the existing alternating current power grid into a stable pure sine wave power supply with required frequency, provides a pure input power supply for a simulation system, and avoids introducing abnormal interference of a power grid.
Furthermore, the coupling filter module filters out the high-frequency signals at the upper level, and keeps the power frequency sine wave for signal output, and the program-controlled attenuation module separates and couples the input analog signals into the power frequency sine wave superposed on the power signals and couples the input analog signals into the power signals of 50Hz and couples the high-frequency communication signals superposed on the power signals for transmission.
Furthermore, multiple programmable attenuation modules CAN be cascaded in a CAN communication mode, adaptive connection is carried out through address codes of 8-bit BCD codes on the attenuation modules, the attenuation amplitude of the whole module is further adjusted, and the direction of a signal channel of the module CAN be changed through a switching unit.
Further, the program-controlled attenuation module controls the attenuation amplitude of the whole attenuation module based on 4 paths of radio frequency chips Sky12347-362LF controlled by TTL signals of STM32F103C8T6, the default maximum attenuation amplitude of the Sky12347-362LF chips is 31.5dB, the step value is 0.5dB, 1 path of the 4 paths of radio frequency chips works in a seven-gear default mode, and all pull-down gears of other 3 paths of gears are fixed at 31.5dB and run in a carry mode.
Further, the signal generator which outputs 25MHz sine waves, square waves, sawtooth waves, pulses and noise waveforms is adopted by the signal generating module as noise interference introduced in the electricity acquisition simulation system, and the noise interference caused by various conditions in a real environment is simulated.
Furthermore, the program-controlled attenuation module comprises a downloading end, the downloading end receives a signal of the coupling filter module and transmits the signal to the MCU processing unit, and the MCU processing unit switches the positive direction and the negative direction of the existing alternating current network power supply to convert the existing alternating current network power supply into a stable pure sine wave power supply with required frequency.
Furthermore, the input end of the MCU processing unit is connected with an MCU power supply unit for supplying power, and the output end of the MCU processing unit is connected with a CAN communication unit for carrying out multi-station cascade.
Furthermore, the MCU processing unit processes data and then utilizes the driving unit to adjust the attenuation amplitude of the whole module, and the adjusted attenuation amplitude parallel data are output to the coupling filtering module.
Furthermore, the coupling filter module filters the high-frequency signal at the upper stage through the LC filter circuit, separates the input analog signal into a 50Hz power signal, and couples out the high-frequency communication signal superimposed on the power signal.
Furthermore, the high-frequency communication signal is coupled to the power signal again after passing through the attenuation output of the programmable attenuation module and is input to the next stage.
Compared with the prior art, the power distribution and utilization acquisition simulation system for the HPLC of the programmable attenuator has the following beneficial effects:
1. the simulation system comprises the following components: the system comprises a power grid simulation unit, a program-controlled attenuation module, a coupling filtering module, a signal generation module, a circuit breaker, a concentrator and a single/three-phase electric energy meter, wherein under the conditions of different line attenuation and noise interference of an electricity consumption information acquisition platform area, the concentrator can regulate different attenuation amplitude values through the information reading capacity of HPLC communication on the multi-stage electric energy meter, and can simulate a 4-layer HPLC communication network;
2. the conditions of actual channel attenuation and noise interference of HPLC communication in the power distribution and utilization acquisition environment are simulated by using the program control attenuation module, the coupling filtering module and the signal generating module, and the functions of carrier signal attenuation, noise interference and multi-level carrier topology identification close to the real conditions in the HPLC power utilization information acquisition environment are simulated under the laboratory condition.
Drawings
FIG. 1 is a system block diagram of a power distribution and utilization acquisition simulation system for HPLC of a programmable attenuator according to the present invention;
FIG. 2 is a block diagram of a power grid simulation unit in the power distribution and utilization acquisition simulation system of the HPLC of the programmable attenuator according to the present invention;
FIG. 3 is a block diagram of a programmed attenuation module in the power distribution and utilization acquisition simulation system of the HPLC of the programmed attenuator according to the present invention;
fig. 4 is a block diagram of a coupling filter module in the power distribution and utilization acquisition simulation system of the HPLC of the programmable attenuator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; and are not to be construed as limiting the present patent, the specific meaning of the above terms will be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-4, preferred embodiments of the present invention are shown.
The system comprises a power grid simulation unit, a programmable attenuation module, a coupling filter module, a signal generation module, a circuit breaker, a concentrator and a three-phase electric energy meter, wherein the coupling filter module is respectively connected with the programmable attenuation module, the circuit breaker and the power grid simulation unit, the circuit breakers are mutually connected, a signal generation module, the concentrator and the three-phase electric energy meter are respectively connected on a connecting line of the circuit breaker, the coupling filter module is also connected with a plurality of electric energy meters in parallel, and the concentrator has the information reading capability on the multi-stage electric energy meter through HPLC communication under the conditions of different line attenuation and noise interference;
specifically, the power grid analog unit is manufactured in an MPWM mode by taking a microprocessor as a core, is designed by an active element IGBT module, adopts digital frequency division, D/A conversion, instantaneous value feedback and sine pulse width modulation technologies, and converts the conventional alternating current power grid into a stable and pure sine wave power supply with required frequency by AC-DC-AC conversion inverter power supply.
The main work flow of the power grid simulation unit is shown in fig. 2, a switch without a fuse of the NFB is input after time point input, judgment of a trip switch is carried out, a series of operations such as filtering and the like are carried out, the NFB is output, protection is carried out on set over-current, over-voltage and over-temperature detection, and intervention protection is carried out on trip control so as to provide a pure input power supply and avoid introducing abnormal interference of a power grid.
In the embodiment, the programmed attenuation module controls the attenuation amplitude of the whole attenuation module based on 4 paths of radio frequency chips Sky12347-362LF controlled by the TTL signal of the STM32F103C8T 6. The default maximum attenuation amplitude of the Sky12347-362LF chip is 31.5dB, the step value is 0.5dB, 1 path of the 4 paths of radio frequency chips works in a seven-gear default mode, all pull-down gears of the other 3 paths of gears are fixed at 31.5dB, and the chip runs in a carry mode. A plurality of program control attenuation modules CAN be cascaded in a CAN communication mode, and adaptive connection is carried out through address codes of 8-bit BCD codes on the attenuation modules, so that the attenuation amplitude of the whole module is adjusted. Meanwhile, the attenuation module can change the direction of the signal channel of the module through the switching unit.
In this embodiment, the coupling filter module has two functions, and in the case of independent operation, the LC filter circuit filters out the upper-level high-frequency signal and retains a "clean" power frequency sine wave; under the condition that the system is matched with the attenuation module, the analog signal input into the coupling filter module can be separated into a 50Hz power signal, the high-frequency communication signal superposed on the power signal is coupled out and input into the attenuation module, and the high-frequency communication signal is coupled onto the power signal again after being output through the attenuation of the attenuation module and input into the next stage.
Specifically, the design of the coupling filtering module considers the authenticity of the electricity consumption information acquisition simulation system, the maximum load current of 10A is supported, and the wording current can be provided for the simulated electric meter.
In the embodiment, the signal generating module adopts a signal generator which supports outputting 25MHz sine waves, square waves, sawtooth waves, pulses and noise waveforms as noise interference introduced in the electricity acquisition simulation system, and simulates noise interference caused by various conditions in a real environment.
In this embodiment, the concentrator and the single/three-phase electric energy meter adopt national grid smart electric meters conforming to the DLT645-2007 communication protocol, and support the HPLC carrier communication function.
In this embodiment, the using process of the programmable attenuation module is as shown in fig. 3, the programmable attenuation module includes a downloading end, the downloading end receives a signal of the coupling filter module to the MCU processing unit, the MCU processing unit converts the current ac power supply into a stable and pure sine wave power supply with a desired frequency by switching the forward and reverse directions, the input end of the MCU processing unit is connected to the MCU power supply unit for supplying power, the output end of the MCU processing unit is connected to the CAN communication unit for multiple cascading, the MCU processing unit processes data and then adjusts the attenuation amplitude of the whole module by using the driving unit, and the adjusted parallel data of the attenuation amplitude is output to the coupling filter module.
In this embodiment, the using flow of the coupling filtering module is as shown in fig. 4, the coupling filtering module filters the upper-stage high-frequency signal through the LC filtering circuit, separates the input analog signal into a 50Hz power signal and couples out the high-frequency communication signal superimposed on the power signal, and the high-frequency communication signal is re-coupled to the power signal after passing through the attenuation output of the programmable attenuation module and is input to the next stage.
The technical scheme includes that the conditions of actual channel attenuation and noise interference of HPLC communication in a distribution and utilization electricity collection environment are simulated by using a program control attenuation module, a coupling filtering module and a signal generation module, carrier signal attenuation, noise interference and multi-level carrier topology identification functions close to the real conditions of the HPLC electricity information collection environment are simulated under laboratory conditions, and under the conditions of different line attenuation and noise interference, a concentrator can simulate a 4-level HPLC communication network by reading information of a multi-level ammeter through HPLC communication and adjusting different attenuation amplitudes.
In this embodiment, the whole operation process can be controlled by a computer, and PLC and the like are added to realize automatic operation control, and in each operation link, signal feedback can be performed by setting a sensor to realize sequential execution of steps, which are conventional knowledge of the current automatic control, and are not repeated in this embodiment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The system is characterized by comprising a power grid simulation unit, a programmable attenuation module, a coupling filter module, a signal generation module, a circuit breaker, a concentrator and a three-phase electric energy meter, wherein the coupling filter module is respectively connected with the programmable attenuation module, the circuit breaker and the power grid simulation unit, the circuit breakers are mutually connected, a connecting line of the circuit breaker is respectively connected with the signal generation module, the concentrator and the three-phase electric energy meter, and the coupling filter module is also connected with a plurality of electric energy meters in parallel;
the power grid simulation unit converts the existing alternating current power grid into a stable pure sine wave power supply with required frequency, provides a pure input power supply for a simulation system, and avoids introducing abnormal interference of a power grid.
2. The system of claim 1, wherein the coupling filter module filters out the upper high frequency signal and keeps the power frequency sine wave for signal output, and the programmable attenuator module separates and couples the input analog signal to the power frequency sine wave superimposed on the power signal, and couples and transmits the power frequency sine wave separated from the input analog signal to the power signal of 50Hz and the high frequency communication signal superimposed on the power signal.
3. The system for simulating power distribution and utilization of HPLC of the programmable attenuator of claim 2, wherein a plurality of programmable attenuation modules CAN be cascaded in a CAN communication manner, and adaptive connection is performed through address codes of 8-bit BCD codes on the attenuation modules, so that the attenuation amplitude of the whole module is adjusted, and the direction of a signal channel of the module CAN be changed through the switching unit.
4. The power consumption acquisition simulation system for HPLC of the programmable attenuator of claim 3, wherein the programmable attenuation module controls the attenuation amplitude of the whole attenuation module based on 4 rf chips Sky12347-362LF controlled by TTL signal of STM32F103C8T6, the Sky12347-362LF chip defaults to a maximum attenuation amplitude of 31.5dB and a step value of 0.5dB, and the 4 rf chips 1 of which operates in a seven-step default mode, and all of the other 3 steps are pulled down to a lower level of 31.5dB and operate in a carry mode.
5. The power consumption collection simulation system for HPLC of the programmable attenuator of claim 4, wherein the signal generation module employs a signal generator outputting 25MHz sine wave, square wave, sawtooth wave, pulse and noise waveform as noise interference introduced in the power consumption collection simulation system, simulating noise interference due to various conditions in real environment.
6. The system of claim 5, wherein the programmable attenuator module comprises a download port, the download port receives the signal from the coupling filter module to the MCU processing unit, and the MCU processing unit converts the AC mains supply into a stable, clean sine wave supply of a desired frequency by switching the AC mains supply in forward and reverse directions.
7. The system for simulating power consumption collection of HPLC of the programmable attenuator of claim 6, wherein the input end of the MCU processing unit is connected with the MCU power supply unit for power supply, and the output end of the MCU processing unit is connected with the CAN communication unit for multi-stage cascade connection.
8. The power consumption collection simulation system for HPLC of the programmable attenuator of claim 7, wherein the MCU processing unit processes the data and then adjusts the attenuation amplitude of the whole module by using the driving unit, and the adjusted attenuation amplitude is outputted to the coupling filter module in parallel.
9. The system of claim 8, wherein the coupling filter module filters the upper high frequency signal through the LC filter circuit, separates the input analog signal into a 50Hz power signal, and couples the high frequency communication signal superimposed on the power signal.
10. The power consumption collection simulation system for HPLC of a programmed attenuator of claim 9, wherein the high frequency communication signal is re-coupled to the power signal and input to the next stage after passing through the attenuated output of the programmed attenuation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217094.4A CN113810081B (en) | 2021-10-19 | 2021-10-19 | Power distribution and utilization acquisition simulation system of HPLC (high performance liquid chromatography) of program-controlled attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217094.4A CN113810081B (en) | 2021-10-19 | 2021-10-19 | Power distribution and utilization acquisition simulation system of HPLC (high performance liquid chromatography) of program-controlled attenuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113810081A true CN113810081A (en) | 2021-12-17 |
| CN113810081B CN113810081B (en) | 2023-05-05 |
Family
ID=78897982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217094.4A Active CN113810081B (en) | 2021-10-19 | 2021-10-19 | Power distribution and utilization acquisition simulation system of HPLC (high performance liquid chromatography) of program-controlled attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113810081B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902255A (en) * | 2010-04-02 | 2010-12-01 | 深圳市蓝可迪科技有限公司 | Simulation test device and method of power line carrier communication |
| WO2013010447A1 (en) * | 2011-07-15 | 2013-01-24 | 中国电力科学研究院 | Carrier communication test device |
| CN108155921A (en) * | 2018-02-02 | 2018-06-12 | 国网江西省电力有限公司电力科学研究院 | System is tested in a kind of power wire broadband carrier communication networking |
| CN108631819A (en) * | 2017-03-15 | 2018-10-09 | 国网四川省电力公司电力科学研究院 | Power line carrier noise jamming tests system and test method |
| CN111600633A (en) * | 2020-05-26 | 2020-08-28 | 国网上海市电力公司 | Low pressure collection is copied testing arrangement based on HPLC |
-
2021
- 2021-10-19 CN CN202111217094.4A patent/CN113810081B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902255A (en) * | 2010-04-02 | 2010-12-01 | 深圳市蓝可迪科技有限公司 | Simulation test device and method of power line carrier communication |
| WO2013010447A1 (en) * | 2011-07-15 | 2013-01-24 | 中国电力科学研究院 | Carrier communication test device |
| CN108631819A (en) * | 2017-03-15 | 2018-10-09 | 国网四川省电力公司电力科学研究院 | Power line carrier noise jamming tests system and test method |
| CN108155921A (en) * | 2018-02-02 | 2018-06-12 | 国网江西省电力有限公司电力科学研究院 | System is tested in a kind of power wire broadband carrier communication networking |
| CN111600633A (en) * | 2020-05-26 | 2020-08-28 | 国网上海市电力公司 | Low pressure collection is copied testing arrangement based on HPLC |
Non-Patent Citations (1)
| Title |
|---|
| 吴维德等: "电力线载波通信抗干扰性能测试研究", 《电测与仪表》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113810081B (en) | 2023-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102156416B (en) | Current transformer control device | |
| CN202093155U (en) | Large-volume multi-adaptable detection platform for grid-connected photovoltaic inverter | |
| CN104506375B (en) | Power wire broadband carrier communication network module test system | |
| CN107169244B (en) | Electromechanical-electromagnetic transient hybrid simulation interface system and method | |
| CN201956908U (en) | Control device of converter | |
| CN201781417U (en) | Cascaded high-voltage frequency converter PWM wave generation control system | |
| CN204304456U (en) | A kind of electrical network auto-reactive compensation system | |
| CN109709434A (en) | The test circuit of cascade converter multi-tool block multi-state simulation | |
| CN105406516B (en) | Anti- PID devices, anti-PID grid-connected photovoltaic systems and anti-PID approach | |
| CN110058100B (en) | Delay measurement method, device and system of direct current transmission system | |
| CN201681481U (en) | Distribution network meter reading system | |
| CN103713563A (en) | Megawatt converter parallel control method and system | |
| CN113810081B (en) | Power distribution and utilization acquisition simulation system of HPLC (high performance liquid chromatography) of program-controlled attenuator | |
| CN111948478B (en) | Power distribution terminal detection system and method under real working condition | |
| CN210895044U (en) | Real-time simulation system capable of flexibly accessing MMC valve control pulse distribution screen | |
| CN211403679U (en) | Three-phase user simulation device for electricity consumption information acquisition low-voltage distribution room | |
| CN108918998B (en) | MMC power module control protection closed-loop test method and system | |
| CN107863889B (en) | A kind of grid disturbance device | |
| CN207764321U (en) | A kind of test system of high pressure SVG low voltage ride-through functions | |
| CN110687824B (en) | Closed loop real-time simulation system and method for chained multi-level converter system | |
| CN205787731U (en) | Controller and control system for MMC | |
| CN202533823U (en) | Temperature control system | |
| CN211403680U (en) | Single-phase user simulation device for electricity consumption information acquisition low-voltage distribution room | |
| CN112003336A (en) | Distributed photovoltaic power factor optimization system and method | |
| CN111585299A (en) | Direct-current energy router and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |