CN111751614B - ModBus-based non-invasive electricity consumption data testing system and method thereof - Google Patents
ModBus-based non-invasive electricity consumption data testing system and method thereof Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 230000005611 electricity Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 6
- 230000002776 aggregation Effects 0.000 claims abstract description 6
- 238000004220 aggregation Methods 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims description 34
- 238000004891 communication Methods 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 9
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/063—Details of electronic electricity meters related to remote communication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention relates to a ModBus-based non-invasive electricity consumption data testing system, which comprises: the load acquisition terminals are arranged at the positions of the load sockets and are respectively used for acquiring classified load power data of different classifications; the main port acquisition terminal is arranged at the entrance of the resident ammeter and is used for acquiring the total port load power data of the resident ammeter; the concentrator is used for carrying out data aggregation on the classified load power data of the plurality of load acquisition terminals and the total port load power data acquired by the total port acquisition terminal; the Modbus server is used for receiving the classified load power data and the total port load power data after the concentrator sets, and carrying out load marking on the classified load power data and the total port load power data to obtain marking results; and the display unit is used for receiving the marking result of the Modbus server and displaying the marking result.
Description
Technical Field
The invention relates to the technical field of electricity data testing, in particular to a ModBus-based non-invasive electricity data testing system and a ModBus-based non-invasive electricity data testing method.
Background
In a non-invasive resident power load monitoring and decomposing system, a plurality of methods are used for verifying the accuracy of a non-invasive load decomposing algorithm in the current system, and the basis is a real mark for carrying out the running state on the original total load data. At present, the main method for marking the load data is to add an intelligent socket at each load power supply position, and compare the real operation characteristics (generally, power) of various loads collected by the intelligent socket with the operation characteristic data (power) of the total-port ammeter, thereby comparing the operation characteristic data (power) of the total-port ammeter. However, the smart socket and the ammeter are generally produced by different manufacturers, the collection frequencies of the smart socket and the ammeter are large, the smart socket and the ammeter cannot communicate with each other, the comparison and marking work is performed manually, the accuracy is low, and therefore the verification effect on the algorithm is poor.
Disclosure of Invention
The invention aims to provide a non-invasive electricity data testing system based on ModBus, which aims to solve the technical problems that an intelligent socket and an ammeter in the existing testing method are generally produced by different factories, the acquisition frequencies of the intelligent socket and the ammeter are large, the intelligent socket and the ammeter cannot be mutually communicated, the comparison and marking work is carried out by manual work, and the accuracy is low.
Therefore, an embodiment of the present invention provides a ModBus-based non-invasive electricity data testing system, which is characterized by comprising:
the load acquisition terminals are arranged at the positions of the load sockets and are respectively used for acquiring classified load power data of different classifications;
the main port acquisition terminal is arranged at the entrance of the resident ammeter and is used for acquiring the total port load power data of the resident ammeter;
the concentrator is used for carrying out data aggregation on the classified load power data of the plurality of load acquisition terminals and the total port load power data acquired by the total port acquisition terminal;
the Modbus server is used for periodically acquiring classified load power data and total port load power data after the concentrator sets are summarized according to a Tcp-Modbus protocol, and carrying out load marking on the classified load power data and the total port load power data to obtain a marking result; and
and the display unit is used for receiving the marking result of the Modbus server and displaying the marking result.
Preferably, the load acquisition terminal and the main port acquisition terminal each comprise a first processor, and a voltage sampling chip, a current sampling chip, a network chip and a buffer unit which are electrically connected with the first processor, wherein the voltage sampling chip and the current sampling chip are respectively used for synchronously acquiring voltage and current of a load, the first processor is used for calculating acquired voltage data and current data to obtain corresponding load power data, the buffer unit is used for buffering the voltage data, the current data and the load power data, and the network chip is used for transmitting the load power data to the concentrator in a wireless communication mode.
Preferably, the first processor develops a Tcp-Modbus protocol stack to enable the load acquisition terminal to perform protocol interaction with a Modbus server as a Tcp-Modbus client, and the concentrator is used for data aggregation and forwarding.
Preferably, the concentrator comprises a second processor, wherein an RJ45 interface and a Wifi interface are arranged on the second processor, the RJ45 interface is used for carrying out data interaction with the server, and the Wifi interface is used for carrying out data interaction with the load acquisition terminal.
Preferably, each load acquisition terminal is provided with a unique address, the address is a Modbus protocol address bit, and different load types correspond to different addresses.
The embodiment of the invention also provides a testing method based on the ModBus non-invasive electricity data testing system, which comprises the following steps:
the Modbus server periodically sends a polling command to the concentrator according to a Tcp-Modbus protocol;
after receiving the polling command, the concentrator issues the polling command to a plurality of load acquisition terminals and a main port acquisition terminal;
after receiving the polling command, the plurality of load acquisition terminals send the acquired classified load power data to a concentrator according to the polling command and a Tcp-Modbus protocol;
after receiving the polling command, the total port acquisition terminal sends acquired total port load power data to a concentrator according to the polling command and a Tcp-Modbus protocol;
the concentrator performs collection and total forwarding on the classified load power data and the total port load power data uploaded by the plurality of load acquisition terminals and the total port acquisition terminal to the Modbus server;
the Modbus server receives the classified load power data and the total port load power data uploaded by the concentrator, and performs load marking on the classified load power data and the total port load power data to obtain a marking result;
and the display unit reads the marking result of the Modbus server through an API interface and displays the marking result.
Preferably, the concentrator aggregates the classified load power data and the total port load power data uploaded by the plurality of load acquisition terminals and the total port acquisition terminal, specifically, aggregates the classified load power data and the total port load power data into a total port load power data table and a plurality of classified load power data tables, respectively, where the total port load power data table and the plurality of classified load power data tables store data sampling time, an acquisition terminal address and load power.
Preferably, the load marking of the classified load power data and the total mouth load power data to obtain a marking result includes:
comparing the data sampling time of each load power in the total port load power data table with the data sampling time corresponding to the load power in the plurality of classified load power data tables;
if the data sampling time of a certain load power in the total port load power data table is the same as the data sampling time of a certain classified load power data table, determining a corresponding load classification type according to the acquisition terminal address of the certain classified load power data table, and marking the load classification type at the position of the certain load power of the total port load power data table.
The embodiment scheme has at least the following beneficial effects:
the method comprises the steps of installing a plurality of load acquisition terminals at the positions of load sockets respectively, installing a main port acquisition terminal at the inlet of a resident electric meter, unifying the acquisition frequency of the acquisition terminals, transmitting load data by adopting a communication protocol based on ModBus, automatically marking the load data, and verifying the accuracy of a non-invasive load decomposition algorithm in the current system by marking results, so that the technical problems that the intelligent socket and the electric meter are generally produced by different factories in the existing test method, have large acquisition frequency differences, cannot communicate with each other, and have very low accuracy due to manual comparison and marking.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a principle architecture of a ModBus-based non-invasive electricity data testing system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a hardware architecture of an acquisition terminal.
Fig. 3 is a schematic diagram of a concentrator hardware architecture.
Fig. 4 is a schematic diagram of Tcp-Modbus protocol acquisition.
Fig. 5 is a schematic diagram of an automatic marking.
Fig. 6 shows the total mouth data before marking.
Fig. 7 is a diagram showing the water heater load data.
Fig. 8 is a diagram showing the intention of the refrigerator load data.
Fig. 9 shows the television load data.
Fig. 10 is a diagram showing the load data of the microwave oven.
Fig. 11 is a schematic diagram of the total mouth marking result.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, numerous specific details are set forth in the following examples in order to provide a better illustration of the invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, well known means have not been described in detail in order to not obscure the present invention.
As shown in fig. 1, an embodiment of the present invention provides a ModBus-based non-invasive electricity data testing system, which includes:
the load acquisition terminals are arranged at the positions of the load sockets and are respectively used for acquiring classified load power data of different classifications;
the main port acquisition terminal is arranged at the entrance of the resident ammeter and is used for acquiring the total port load power data of the resident ammeter;
the concentrator is used for carrying out data aggregation on the classified load power data of the plurality of load acquisition terminals and the total port load power data acquired by the total port acquisition terminal;
the Modbus server is used for periodically acquiring classified load power data and total port load power data after the concentrator sets are summarized according to a Tcp-Modbus protocol, and carrying out load marking on the classified load power data and the total port load power data to obtain a marking result; and
and the display unit is used for receiving the marking result of the Modbus server and displaying the marking result.
The load acquisition terminal and the total port acquisition terminal have the same hardware architecture, as shown in fig. 2, and each of the load acquisition terminal and the total port acquisition terminal comprises a first processor, a voltage sampling chip, a current sampling chip, a network chip and a buffer unit, wherein the voltage sampling chip, the current sampling chip and the buffer unit are electrically connected with the first processor, the voltage sampling chip and the current sampling chip are respectively used for synchronously acquiring voltage and current of a load, the first processor is used for calculating acquired voltage data and current data to obtain corresponding load power data, the buffer unit is used for buffering the voltage data, the current data and the load power data, and the network chip is used for transmitting the load power data to the concentrator in a wireless communication mode.
Specifically, in this embodiment, the requirement of the accuracy of the marking on the acquisition frequency is considered, and 2 high-speed parallel AD sampling chips (model LTC 1606) with 16 bits are selected to acquire the voltage and the current synchronously. The main CPU selects a 16-bit fixed point DSP (model TMS320VC 5402) to perform operations such as phase synchronization, power calculation, result caching, interface forwarding and the like on two paths of sampling data, and simultaneously develops a Tcp-Modbus protocol stack in a chip so that the acquisition terminal is used as a Tcp-Modbus client to perform protocol interaction with a Modbus server. The result data is stored at a power value per second, so that a 2M capacity SDRAM (model number HY57V281620 ETSDRAM) is selected for result data caching, the cache capacity is set to 600 seconds of power data in consideration of the Modbus server calling interval time, and the result data is connected to the network chip (model number MT 7681) through an SPI bus and transmitted to the Modbus server.
The hardware architecture of the concentrator is shown in fig. 3, the concentrator comprises a second processor (model TI-CC 3320), the second processor is connected with an RJ45 interface through an SPI bus, the second processor is connected with a Wifi interface through an SCI bus, the RJ45 interface is used for data interaction with a server, and the Wifi interface is used for data interaction with a load acquisition terminal.
Specifically, the distributed access of the maximum 30 acquisition terminals is considered, wi-Fi is selected as a communication mode of the concentrator and the plurality of terminals, and the workload of wiring and debugging is reduced. The core processor selects a high-speed communication chip integrated with an ARM core, and the development of a Modus protocol stack is completed through ARM, and the SDRAM with 512Kb capacity is built in the high-speed communication chip, so that the data caching requirement of a Modbus protocol polling and calling gap is met. Meanwhile, the high-speed communication chip performs data interaction with the server through an RJ45 interface.
Each load acquisition terminal is provided with a unique address, the address is a Modbus protocol address bit, and different load types correspond to different addresses.
As shown in fig. 4, the embodiment of the present invention further provides a testing method based on the ModBus non-invasive electricity data testing system according to the above embodiment, including:
step S1, a Modbus server periodically sends a polling command to a concentrator according to a Tcp-Modbus protocol;
step S2, after receiving the polling command, the concentrator issues the polling command to a plurality of load acquisition terminals and a main port acquisition terminal;
step S3, after receiving the polling command, the plurality of load acquisition terminals send the acquired classified load power data to a concentrator according to the polling command and a Tcp-Modbus protocol;
s4, after receiving the polling command, the total port acquisition terminal sends acquired total port load power data to a concentrator according to the polling command and a Tcp-Modbus protocol;
s5, the concentrator collects and transmits the classified load power data and the total port load power data uploaded by the plurality of load acquisition terminals and the total port acquisition terminal to the Modbus server;
s6, the Modbus server receives the classified load power data and the total port load power data uploaded by the concentrator, and performs load marking on the classified load power data and the total port load power data to obtain a marking result;
and S7, the display unit reads the marking result of the Modbus server through an API interface and displays the marking result.
Specifically, in this embodiment, the load power data is collected in real time by the plurality of load collection terminals and the total port collection terminal, and specifically, the sampling period is 1 second. The Modbus server collects data of different terminals by using a Tcp-Modbus protocol, and the collection mechanism is shown in figure 5. Because the communication mode of the system is based on a TCP mechanism, a Tcp-Modbus protocol based on a Tcp mechanism is adopted to complete data acquisition, a service end initiates a polling and calling command, the polling and calling command is issued to each terminal through a concentrator, and each acquisition terminal sequentially responds after receiving the calling command and transmits load data back to a Modbus server through the concentrator. Specifically, each calling command calls 10 seconds of power data, sequentially calls 10 seconds of power data of the next terminal, and simultaneously sequentially stores the power data into a corresponding data table of the server, wherein the total port data is stored into a table of 'total port original power data', classified loads are stored into a corresponding table of 'load n power data', and the storage time is 10 seconds each time. And circularly executing the steps to finish the data acquisition and storage work of all terminals in the system.
The concentrator is used for integrating the classified load power data and the total port load power data uploaded by the plurality of load acquisition terminals and the total port acquisition terminals, and specifically, the classified load power data and the total port load power data are respectively integrated into a total port load power data table and a plurality of classified load power data tables, and the total port load power data table and the plurality of classified load power data tables are stored with data sampling time, an acquisition terminal address and load power.
The load marking of the classified load power data and the total port load power data to obtain a marking result comprises the following steps:
comparing the data sampling time of each load power in the total port load power data table with the data sampling time corresponding to the load power in the plurality of classified load power data tables;
if the data sampling time of a certain load power in the total port load power data table is the same as the data sampling time of a certain classified load power data table, determining a corresponding load classification type according to the acquisition terminal address of the certain classified load power data table, and marking the load classification type at the position of the certain load power of the total port load power data table.
Specifically, comparing the time consistency of the load power data of the total port every 1 second with the effective power data of the classified load every 1 second, if the time is consistent, marking the name of the corresponding load on the total port power data, and the like, and finally obtaining a table of the total port power marking result. Wherein, each table is stored in an Oracle data table format.
Wherein, the step S7 includes: and reading the Oracle data table through the API interface and storing the Oracle data table in an excel format for display. As shown in fig. 6-11 below, wherein different loads correspond to different addresses, which are Modbus protocol address bits, and which also correspond to corresponding loads. The total port marking result is the load data marking finally output by the system, and the marking can be used as a standard for evaluating and testing the accuracy of a non-invasive data algorithm. Specifically, a non-invasive load is decomposed by a non-invasive load decomposition algorithm to obtain a decomposition result, and then the accuracy of the decomposition result can be intuitively judged according to the total mouth marking result and the power parameter of each load type in operation.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (6)
1. A ModBus-based non-invasive electricity data testing system, comprising:
the load acquisition terminals are arranged at the positions of the load sockets and are respectively used for acquiring classified load power data of different classifications;
the main port acquisition terminal is arranged at the entrance of the resident ammeter and is used for acquiring the total port load power data of the resident ammeter;
the concentrator is used for carrying out data aggregation on the classified load power data of the plurality of load acquisition terminals and the total port load power data acquired by the total port acquisition terminal;
the Modbus server is used for periodically acquiring classified load power data and total port load power data after the concentrator sets are summarized according to a Tcp-Modbus protocol, and carrying out load marking on the classified load power data and the total port load power data to obtain a marking result; and
the display unit is used for receiving the marking result of the Modbus server and displaying the marking result;
each load acquisition terminal is provided with a unique address, the address is a Modbus protocol address bit, and different load types correspond to different addresses;
the Modbus server performs load marking on the classified load power data and the total port load power data to obtain a marking result, and the method comprises the following steps: comparing the data sampling time of each load power in the total port load power data table with the data sampling time corresponding to the load power in the plurality of classified load power data tables; if the data sampling time of a certain load power in the total port load power data table is the same as the data sampling time of a certain classified load power data table, determining a corresponding load classification type according to the acquisition terminal address of the certain classified load power data table, and marking the load classification type at the position of the certain load power of the total port load power data table.
2. The ModBus-based non-invasive electricity consumption data testing system according to claim 1, wherein the load acquisition terminal and the total port acquisition terminal comprise a first processor, a voltage sampling chip, a current sampling chip, a network chip and a buffer unit, wherein the voltage sampling chip, the current sampling chip and the buffer unit are electrically connected with the first processor, the voltage sampling chip and the current sampling chip are respectively used for synchronously acquiring voltage and current of a load, the first processor is used for calculating acquired voltage data and current data to obtain corresponding load power data, the buffer unit is used for buffering the voltage data, the current data and the load power data, and the network chip is used for transmitting the load power data to the concentrator in a wireless communication mode.
3. The ModBus-based non-intrusive electricity data testing system of claim 2, wherein the first processor develops a Tcp-ModBus protocol stack to enable the load acquisition terminal to interact with a ModBus server as a Tcp-ModBus client, and the concentrator is used for data aggregation and forwarding.
4. The ModBus-based non-invasive electricity data testing system according to claim 1, wherein the concentrator comprises a second processor, an RJ45 interface and a Wifi interface are arranged on the second processor, the RJ45 interface is used for data interaction with a server, and the Wifi interface is used for data interaction with a load acquisition terminal.
5. A test method based on a ModBus non-invasive electricity data test system according to claim 1, comprising:
the Modbus server periodically sends a polling command to the concentrator according to a Tcp-Modbus protocol;
after receiving the polling command, the concentrator issues the polling command to a plurality of load acquisition terminals and a main port acquisition terminal;
after receiving the polling command, the plurality of load acquisition terminals send the acquired classified load power data to a concentrator according to the polling command and a Tcp-Modbus protocol;
after receiving the polling command, the total port acquisition terminal sends acquired total port load power data to a concentrator according to the polling command and a Tcp-Modbus protocol;
the concentrator performs collection and total forwarding on the classified load power data and the total port load power data uploaded by the plurality of load acquisition terminals and the total port acquisition terminal to the Modbus server;
the Modbus server receives the classified load power data and the total port load power data uploaded by the concentrator, and performs load marking on the classified load power data and the total port load power data to obtain a marking result;
and the display unit reads the marking result of the Modbus server through an API interface and displays the marking result.
6. The test method according to claim 5, wherein the concentrator aggregates the classified load power data and the total port load power data uploaded by the plurality of load acquisition terminals and the total port acquisition terminal, specifically, aggregates the classified load power data and the total port load power data into a total port load power data table and a plurality of classified load power data tables, respectively, wherein the total port load power data table and the plurality of classified load power data tables store data sampling time, acquisition terminal address and load power.
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