CN110579732A - System for testing load recognition function - Google Patents
System for testing load recognition function Download PDFInfo
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- CN110579732A CN110579732A CN201910996156.2A CN201910996156A CN110579732A CN 110579732 A CN110579732 A CN 110579732A CN 201910996156 A CN201910996156 A CN 201910996156A CN 110579732 A CN110579732 A CN 110579732A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a system for testing a load identification function, which comprises a power grid wave recording device, a first processor connected with the power grid wave recording device and used for decomposing voltage waveforms and current waveforms, a low-voltage transmission circuit connected with the first processor, and a load identification device connected with the low-voltage transmission circuit and used for running load identification software to be tested. Because the power information needs to be converted into a low-voltage signal and then input into the load identification device when load identification is performed, in the prior art, the recorded waveform needs to be subjected to voltage reduction sampling after being restored to 220V high voltage. The system for testing the load identification function directly plays back the waveform recorded by the power grid wave recording device to the load identification device in a low-pressure mode, can meet the test requirement, does not need a high-pressure playback device, and therefore reduces the complexity of the load identification function test and reduces the test cost compared with the prior art.
Description
Technical Field
The invention relates to the technical field of power grid system testing, in particular to a system for testing a load identification function.
Background
in the era of the smart grid, the bottleneck that the current household electric meter of a user can only read the total power consumption and cannot deeply analyze the internal load components of the user to obtain the limited load information must be broken through so as to perfect the power consumption information acquisition system and the smart power consumption system. The non-intrusive load monitoring (NILM) technology is developed, and only signals carrying power information such as voltage and current of a total load are required to be obtained, the information includes information of different characteristic load components, and by extracting characteristic information of the electrical quantities, a non-intrusive load monitoring system can realize load decomposition and judge power information of each load. The premise for realizing load decomposition is load identification. Therefore, testing the load recognition capability of the grid detection device is very important.
One of the schemes for testing the load identification function in the prior art is to adopt actual electric appliances to build a system, and needs an independent laboratory to place various electric appliances, so that the waste of space resources is serious, and the mobility is poor. Therefore, in an improved technical scheme, the waveform playback is performed by adopting equipment such as a wave recorder and the like, and the waveform is input into a power grid monitoring device for load identification capability test, so that space resources can be effectively saved.
the technical scheme for providing the test scheme of the load identification function, which is easy to realize and reduces the cost, is needed to be solved by the technical personnel in the field.
Disclosure of Invention
the invention aims to provide a system for testing a load identification function, which is used for reducing the complexity of the load identification function test and reducing the test cost.
To solve the above technical problem, the present invention provides a system for testing a load recognition function, comprising:
The power grid wave recording device, with the first treater that is used for decomposing voltage waveform and current waveform that the power grid wave recording device is connected, with the low pressure transmission circuit that first treater is connected, and with the load recognition device that is used for the operation load recognition software that awaits measuring that the low pressure transmission circuit is connected.
Optionally, the low-voltage transmission circuit specifically includes a current transmission circuit, a voltage transmission circuit and a metering core;
The first end of the current transmission circuit is connected with the current signal output end of the first processor, and the second end of the current transmission circuit is connected with the current signal input end of the metering core; the first end of the voltage transmission circuit is connected with the voltage signal output end of the first processor, and the second end of the voltage transmission circuit is connected with the voltage signal input end of the metering core; the current signal output end of the metering core is connected with the current signal input end of the load identification device, and the voltage signal output end of the metering core is connected with the voltage signal input end of the load identification device.
Optionally, the current transmission circuit specifically includes a first audio output device, a power amplification device, and a current sampling circuit;
The first end of the first audio output device is the first end of the current transmission circuit, the second end of the first audio output device is connected with the first end of the power amplification device, the second end of the power amplification device is connected with the first end of the current conversion device, and the second end of the current sampling circuit is the second end of the current transmission circuit; the power amplifying device is used for converting the current signal of the first audio output device into a current signal of 1 mA-20A.
Optionally, the current sampling circuit specifically includes a current divider and/or a circuit transformer.
Optionally, the voltage transmission circuit specifically includes a second audio output device, a programmable power supply voltage output device, and a voltage sampling circuit;
The first end of the second audio output device is the first end of the voltage transmission circuit, the second end of the second audio output device is connected with the first end of the programmable power supply voltage output device, the second end of the programmable power supply voltage output device is connected with the first end of the voltage sampling circuit, and the second end of the voltage sampling circuit is the second end of the voltage transmission circuit; and the program-controlled power supply voltage output device is used for converting the voltage signal of the second audio output device into a voltage signal of 0.5-22V.
optionally, the voltage sampling circuit is specifically a resistance voltage dividing circuit.
Optionally, the low-voltage transmission circuit specifically includes a protocol conversion device for converting output data of the power grid wave recording device into a protocol consistent with the load identification device.
optionally, the protocol conversion device is specifically configured to convert output data of the power grid wave recording device into 698 communication protocol.
Optionally, the protocol conversion device is specifically connected to the SPI interface of the load identification device through an SPI bus.
Optionally, the method further includes:
And the second processor is respectively connected with the voltage wave recording device and the load identification device and is used for controlling the recording of the waveform of a preset load into the voltage wave recording device, acquiring the load identification result of the load identification device and obtaining the test result of the load identification function according to the preset load and the load identification result.
The system for testing the load identification function comprises a power grid wave recording device, a first processor connected with the power grid wave recording device and used for decomposing voltage waveforms and current waveforms, a low-voltage transmission circuit connected with the first processor, and a load identification device connected with the low-voltage transmission circuit and used for running load identification software to be tested. Because the power information needs to be converted into a low-voltage signal and then input into the load identification device when load identification is performed, in the prior art, the recorded waveform needs to be subjected to voltage reduction sampling after being restored to 220V high voltage. The system for testing the load identification function directly plays back the waveform recorded by the power grid wave recording device to the load identification device in a low-pressure mode, can meet the test requirement, does not need a high-pressure playback device, and therefore reduces the complexity of the load identification function test and reduces the test cost compared with the prior art.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first system for testing a load identification function according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a second system for testing a load identification function according to an embodiment of the present invention;
Fig. 3 is a circuit diagram of a voltage sampling circuit according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a third system for testing a load identification function according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a system for testing the load identification function, which is used for reducing the complexity of the load identification function test and reducing the test cost.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
fig. 1 is a schematic structural diagram of a first system for testing a load identification function according to an embodiment of the present invention.
As shown in fig. 1, a system for testing a load recognition function according to an embodiment of the present invention includes:
The system comprises a power grid wave recording device 101, a first processor 102 connected with the power grid wave recording device 101 and used for decomposing voltage waveforms and current waveforms, a low-voltage transmission circuit 103 connected with the first processor 102, and a load identification device 104 connected with the low-voltage transmission circuit 103 and used for running load identification software to be tested.
In a specific implementation, the grid wave recording device 101 is a device for recording power information such as waveforms and effective values of three-phase current and zero-sequence current on a line, waveforms and effective values of three-phase voltage and zero-sequence voltage on a bus, and the like. The first processor 102 is configured to run waveform editing software (refer to the prior art in particular) for splitting the voltage waveform and the current waveform of the load. The low-voltage transmission circuit 103 is used for converting the voltage waveform signal and the current waveform signal into a range suitable for the load identification device 104, so as to realize low-voltage playback of the power grid wave recording device 101.
When the system for testing the load identification function provided by the embodiment of the invention is used for testing the load identification function, the multi-load operation in different time intervals is controlled, and the waveform of each load is recorded into the power grid recording device 101 for storage; then, the voltage waveform data and the current waveform data are synchronously output and sampled through the first processor 102 and the low-voltage transmission circuit 103, the voltage waveform data and the current waveform data are provided for the load identification device 104 running the load identification software to be detected, the load identification result of the load identification device 104 is checked, the load identification result is compared with the load running in advance, the test result of the load identification capability of the load identification device 104 can be obtained, and the identification time, the identification accuracy and the like can be used as evaluation bases.
Furthermore, a filter device, a voltage regulator device and the like can be arranged in the low-voltage transmission circuit 103, so that the signal transmission quality is ensured, and the test success rate is improved.
Fig. 2 is a schematic structural diagram of a second system for testing a load identification function according to an embodiment of the present invention; fig. 3 is a circuit diagram of a voltage sampling circuit according to an embodiment of the present invention.
As shown in fig. 2, on the basis of the above embodiment, in the system for testing the load identification function provided by the embodiment of the present invention, the low voltage transmission circuit 103 specifically includes a current transmission circuit 201, a voltage transmission circuit 202 and a metering core 203;
A first end of the current transmission circuit 201 is connected with a current signal output end of the first processor 102, and a second end of the current transmission circuit 201 is connected with a current signal input end of the metering core 203; a first end of the voltage transmission circuit 202 is connected with a voltage signal output end of the first processor 102, and a second end of the voltage transmission circuit 202 is connected with a voltage signal input end of the metering core 203; the current signal output of the metering core 203 is connected to the current signal input of the load recognition device 104, and the voltage signal output of the metering core 203 is connected to the voltage signal input of the load recognition device 104.
the low-voltage transmission circuit 103 in the system for testing the load identification function provided by the embodiment of the invention can simulate the process of converting the actual electric power information collected by the electric meter into a digital signal. When the first processor 102 decomposes the waveform recorded by the power grid recording device 101 into a voltage waveform and a current waveform, the voltage signal and the current signal are divided into two paths for low-voltage playback and sampling, and the two paths are input into the load identification device 104 after data collection is performed through the metering core 203.
in a specific implementation, the current transmission circuit 201 may specifically include a first audio output device, a power amplification device, and a current sampling circuit;
The first end of the first audio output device is the first end of the current transmission circuit 201, the second end of the first audio output device is connected with the first end of the power amplification device, the second end of the power amplification device is connected with the first end of the current conversion device, and the second end of the current sampling circuit is the second end of the current transmission circuit 201; the power amplifying device is used for converting the current signal of the first audio output device into a current signal of 1 mA-20A.
In particular, the current sampling circuit may employ a shunt and/or a circuit transformer.
The voltage transmission circuit 202 specifically includes a second audio output device, a programmable power supply voltage output device and a voltage sampling circuit;
The first end of the second audio output device is the first end of the voltage transmission circuit 202, the second end of the second audio output device is connected with the first end of the programmable power supply voltage output device, the second end of the programmable power supply voltage output device is connected with the first end of the voltage sampling circuit, and the second end of the voltage sampling circuit is the second end of the voltage transmission circuit 202; the program-controlled power supply voltage output device is used for converting the voltage signal of the second audio output device into a voltage signal of 0.5-22V.
specifically, the voltage sampling circuit may employ a resistance voltage-dividing circuit. As shown in fig. 3, the resistance voltage divider circuit is composed of voltage dividing resistors R2, R3, R4 and an RC filter circuit (including a resistor R5 and a capacitor C1), wherein the voltage dividing resistors R2, R3, and R4 may all adopt 100k Ω resistors, the resistor R5 adopts 1k Ω resistors, and the capacitor C1 may adopt 333F capacitors. The first end VIN of the resistance voltage-dividing circuit is used for connecting the second end of the programmable power supply voltage output device, and the second end EMU IN of the resistance voltage-dividing circuit is used for connecting the voltage input end of the metering core 203.
the metering chip 203 is a device formed by a metering chip and an MCU.
Fig. 4 is a schematic structural diagram of a third system for testing a load identification function according to an embodiment of the present invention.
As shown in fig. 4, on the basis of the above embodiment, in the system for testing the load identification function according to the embodiment of the present invention, the low voltage transmission circuit 103 specifically includes a protocol conversion device 401 for converting the output data of the grid recording device 101 into a protocol consistent with that of the load identification device 104.
compared with the low-voltage transmission circuit 103 in fig. 3, the low-voltage transmission circuit 103 in the embodiment of the present invention is only composed of the protocol conversion device 401, so that the function of collecting the actual electricity meter is omitted, and the test system and the test scheme are further simplified.
In a specific implementation, the protocol conversion device 401 is specifically configured to convert 698 the output data of the power grid wave recording device 101 into a communication protocol. The protocol conversion device 401 may be specifically connected to the SPI interface of the load identification device 104 through the SPI bus.
On the basis of the above embodiment, in another embodiment, the system for testing the load recognition function further includes:
And the second processor is respectively connected with the voltage wave recording device and the load identification device 104 and is used for controlling the recording of the waveform of the preset load into the voltage wave recording device, acquiring the load identification result of the load identification device 104 and obtaining the test result of the load identification function according to the preset load and the load identification result.
in order to improve the automation level of the test, the system for testing the load identification function provided by the invention is also provided with a second processor, and the second processor is used for controlling the multi-load to be recorded into the voltage wave recording device in time intervals after the test is started, obtaining the load identification result of the load identification device 104 and obtaining the test result of the load identification function according to the preset load and the load identification result. For each known load, whether the load recognition result of the load recognition device 104 is correct or not is recorded. The identification capability of the load identification device 104 is evaluated according to the identification time and the identification accuracy of the load identification device 104 for all the loads participating in the test, and the identification capability can be compared with a preset threshold value to judge whether the load identification capability is qualified or not.
it should be noted that the above-described embodiments of the apparatus and device are merely illustrative, for example, the division of modules is only one division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The system for testing the load recognition function provided by the invention is described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A system for testing load recognition functionality, comprising:
The power grid wave recording device, with the first treater that is used for decomposing voltage waveform and current waveform that the power grid wave recording device is connected, with the low pressure transmission circuit that first treater is connected, and with the load recognition device that is used for the operation load recognition software that awaits measuring that the low pressure transmission circuit is connected.
2. The system according to claim 1, characterized in that the low voltage transmission circuit comprises in particular a current transmission circuit, a voltage transmission circuit and a metering core;
The first end of the current transmission circuit is connected with the current signal output end of the first processor, and the second end of the current transmission circuit is connected with the current signal input end of the metering core; the first end of the voltage transmission circuit is connected with the voltage signal output end of the first processor, and the second end of the voltage transmission circuit is connected with the voltage signal input end of the metering core; the current signal output end of the metering core is connected with the current signal input end of the load identification device, and the voltage signal output end of the metering core is connected with the voltage signal input end of the load identification device.
3. The system according to claim 2, characterized in that the current transmission circuit comprises in particular a first audio output device, a power amplification device and a current sampling circuit;
The first end of the first audio output device is the first end of the current transmission circuit, the second end of the first audio output device is connected with the first end of the power amplification device, the second end of the power amplification device is connected with the first end of the current conversion device, and the second end of the current sampling circuit is the second end of the current transmission circuit; the power amplifying device is used for converting the current signal of the first audio output device into a current signal of 1 mA-20A.
4. The system according to claim 3, characterized in that the current sampling circuit comprises in particular a shunt and/or a circuit transformer.
5. The system according to claim 2, wherein the voltage transmission circuit comprises in particular a second audio output device, a programmable supply voltage output device and a voltage sampling circuit;
The first end of the second audio output device is the first end of the voltage transmission circuit, the second end of the second audio output device is connected with the first end of the programmable power supply voltage output device, the second end of the programmable power supply voltage output device is connected with the first end of the voltage sampling circuit, and the second end of the voltage sampling circuit is the second end of the voltage transmission circuit; and the program-controlled power supply voltage output device is used for converting the voltage signal of the second audio output device into a voltage signal of 0.5-22V.
6. The system according to claim 5, characterized in that the voltage sampling circuit is embodied as a resistive voltage divider circuit.
7. the system according to claim 1, characterized in that the low voltage transmission circuit comprises in particular protocol conversion means for converting the output data of the grid recording means into a protocol in accordance with the load identification means.
8. the system of claim 7, wherein the protocol conversion device is specifically configured to convert 698 the output data of the grid recording device into a communication protocol.
9. The system according to claim 7, characterized in that the protocol conversion means is connected to the SPI interface of the load identification means, in particular via an SPI bus.
10. The system of claim 1, further comprising:
and the second processor is respectively connected with the voltage wave recording device and the load identification device and is used for controlling the recording of the waveform of a preset load into the voltage wave recording device, acquiring the load identification result of the load identification device and obtaining the test result of the load identification function according to the preset load and the load identification result.
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| CN201910996156.2A CN110579732A (en) | 2019-10-18 | 2019-10-18 | System for testing load recognition function |
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| CN201910996156.2A CN110579732A (en) | 2019-10-18 | 2019-10-18 | System for testing load recognition function |
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Cited By (2)
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| CN111505559A (en) * | 2020-04-29 | 2020-08-07 | 国网重庆市电力公司营销服务中心 | Load identification electric energy meter detection method and device |
| CN111856131A (en) * | 2020-07-17 | 2020-10-30 | 许继集团有限公司 | Load data recording method and device |
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Application publication date: 20191217 |
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