阅读说明：本技术 一种用于居民负荷的多路量测装置及方法 (Multi-path measuring device and method for resident load ) 是由 王毓琦 杨剑 张淞珲 郭腾炫 刘涛 王春晖 张仲耀 张长骁 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种用于居民负荷的多路量测装置及方法,装置包括模数转换器、信号调理模块、通信模块、信号处理器、同步时钟模块、高速存储模块和电源转换模块；所述信号调理模块的输入端分别三路模数转换器连接,所述三路模数转换器的输入端分别与设置在插座电路、空调电路和照明电路中的电流/电压采集单元连接,用于采集插座、空调和照明回路的电压电流数据,所述信号调理模块的输出端与信号处理器连接；所述同步时钟模块和高速存储模块分别与信号处理器连接,所述信号处理器通过通信模块与系统主站连接。本发明充分利用非侵入式量测和精确独立计量的各自优势对居民负荷用电进行分项计量。(The invention discloses a multipath measuring device and method for resident load, wherein the device comprises an analog-to-digital converter, a signal conditioning module, a communication module, a signal processor, a synchronous clock module, a high-speed storage module and a power conversion module; the input ends of the signal conditioning modules are respectively connected with three analog-to-digital converters, the input ends of the three analog-to-digital converters are respectively connected with current/voltage acquisition units arranged in the socket circuit, the air conditioner circuit and the lighting circuit and used for acquiring voltage and current data of the socket, the air conditioner and the lighting circuit, and the output ends of the signal conditioning modules are connected with the signal processor; the synchronous clock module and the high-speed storage module are respectively connected with a signal processor, and the signal processor is connected with a system master station through a communication module. The invention fully utilizes respective advantages of non-invasive measurement and accurate independent measurement to carry out the subentry measurement on the load electricity consumption of residents.)

1. A multi-path measuring device for resident load is characterized by comprising an analog-to-digital converter, a signal conditioning module, a communication module, a signal processor, a synchronous clock module, a high-speed storage module and a power supply conversion module; the input ends of the signal conditioning modules are respectively connected with three analog-to-digital converters, the input ends of the three analog-to-digital converters are respectively connected with current/voltage acquisition units arranged in the socket circuit, the air conditioner circuit and the lighting circuit and used for acquiring voltage and current data of the socket, the air conditioner and the lighting circuit, and the output ends of the signal conditioning modules are connected with the signal processor; the synchronous clock module and the high-speed storage module are respectively connected with a signal processor, and the signal processor is connected with a system master station through a communication module.

2. A multi-channel measuring device for residential loads as claimed in claim 1, wherein said a/d converter is a 24-bit two-channel high-speed a/d converter model AD 7746.

3. The multi-channel measuring device for the load of residents of claim 1, wherein the signal conditioning module is a low pass filter module with model number B82790C0113N 201.

4. The multi-path measuring device for the residential load as claimed in claim 1, wherein said current/voltage collecting unit comprises a voltage transformer and a current transformer of the same class as that of the general electric energy meter.

5. The multi-channel measuring device for the load of residents according to claim 1, wherein the power conversion module comprises an AC-DC power supply module for providing DC power supply with different voltage levels for the device.

6. A multi-channel measuring device for resident load according to any one of claims 1-5, wherein said device is installed in the resident's distribution box for collecting the voltage and current data of the socket, air conditioner and lighting circuit and monitoring the socket branch, air conditioner branch and lighting branch.

7. The multi-channel measuring device for the load of residents according to claim 6, wherein the socket branch monitoring is carried out by adopting a non-invasive measuring method in the process of monitoring the socket branches; and an invasive measurement method is adopted in the process of monitoring the air-conditioning branch and the lighting branch to monitor the air-conditioning branch and the lighting branch.

8. A multi-path measuring method for resident load is characterized by comprising the following steps:

collecting voltage and current data of each path of resident load power supply;

performing analog-to-digital conversion on the voltage and current data, and performing filtering processing;

calculating the load of each path of resident load power supply according to the voltage and current data;

and locally storing the load calculation result and uploading the load calculation result to a system main station.

9. The method as claimed in claim 8, wherein the voltage and current data of each residential load comprises voltage and current data of sockets, air-conditioning and lighting circuits.

10. The multi-channel measuring method for residential loads according to claim 9, wherein said load calculating process of each residential load power supply comprises:

calculating the subentry measurement load of the socket branch by adopting a non-invasive load decomposition and identification algorithm on the voltage and current data of the socket loop;

and calculating the sub-item measuring loads of the air conditioner branch and the lighting branch by adopting a fast discrete Fourier algorithm according to the voltage and current data of the air conditioner and the lighting loop.

Technical Field

The invention relates to a multipath measuring device and method for residential load, belonging to the technical field of load measurement.

Background

In recent years, with the development of economy and the acceleration of urbanization process in China, the total electricity load of residents tends to increase day by day due to the continuous increase of urban population, and the proportion of the total electricity load of residents used in a power grid is increased continuously. The measurement of the total amount of the residential electricity load cannot meet the application requirements of the current power company in terms of customer service, energy conservation and efficiency improvement, electricity safety and demand side management, and the method of measuring the residential electricity load by items and establishing a load management system by items is an effective way for solving the requirements.

At present, the individual measurement of the load and the electricity consumption of residents generally adopts an independent invasive measurement method for each load or adopts a non-invasive measurement method at a main port of the electricity consumption of residents. The intrusive method needs more measuring devices, although the measurement is accurate, the line needs to be modified at some positions where the measuring devices are inconvenient to install, and the device deployment and maintenance cost is high. And by adopting a non-invasive measurement method, a non-invasive load decomposition algorithm is only carried out on a single measurement point of a main port to obtain a result, and along with the self characteristics of a decomposition target and the background interference of an electricity environment, the precision is not ideal and can only reach an estimation level.

Disclosure of Invention

Aiming at the problems of the household load electricity consumption subentry measurement, the invention provides a multi-path measuring device and method for household load, which can fully utilize respective advantages of non-invasive measurement and accurate independent measurement to perform subentry measurement on household load electricity consumption.

The technical scheme adopted for solving the technical problems is as follows:

on one hand, the multi-path measuring device for the load of the residents provided by the embodiment of the invention comprises an analog-to-digital converter, a signal conditioning module, a communication module, a signal processor, a synchronous clock module, a high-speed storage module and a power supply conversion module; the input ends of the signal conditioning modules are respectively connected with three analog-to-digital converters, the input ends of the three analog-to-digital converters are respectively connected with current/voltage acquisition units arranged in the socket circuit, the air conditioner circuit and the lighting circuit and used for acquiring voltage and current data of the socket, the air conditioner and the lighting circuit, and the output ends of the signal conditioning modules are connected with the signal processor; the synchronous clock module and the high-speed storage module are respectively connected with a signal processor, and the signal processor is connected with a system master station through a communication module.

As a possible implementation manner of this embodiment, the analog-to-digital converter adopts a 24-bit dual-channel high-speed analog-to-digital converter with model number AD 7746.

As a possible implementation manner of this embodiment, the signal conditioning module employs a low-pass filtering module with a model number B82790C0113N 201.

As a possible implementation manner of this embodiment, the current/voltage collecting unit includes a voltage transformer and a current transformer of the same class as that of a common electric energy meter.

As a possible implementation manner of this embodiment, the power conversion module includes an AC-DC power module, which provides direct current power supplies with different voltage levels for the apparatus.

As a possible implementation manner of this embodiment, the device is installed in a residential distribution box and is used for collecting voltage and current data of a socket, an air conditioner and an illumination loop and monitoring a socket branch, an air conditioner branch and an illumination branch.

As a possible implementation manner of this embodiment, in the process of monitoring the socket branch, a non-invasive measurement method is adopted to perform socket branch monitoring; and an invasive measurement method is adopted in the process of monitoring the air-conditioning branch and the lighting branch to monitor the air-conditioning branch and the lighting branch.

On the other hand, the multi-path measuring method for the load of the residents provided by the embodiment of the invention comprises the following steps:

collecting voltage and current data of each path of resident load power supply;

performing analog-to-digital conversion on the voltage and current data, and performing filtering processing;

calculating the load of each path of resident load power supply according to the voltage and current data;

and locally storing the load calculation result and uploading the load calculation result to a system main station.

As a possible implementation manner of this embodiment, the voltage and current data of each residential load power supply includes voltage and current data of sockets, air conditioners and lighting circuits.

As a possible implementation manner of this embodiment, the process of calculating the load of each path of power supply of the residential load includes:

calculating the subentry measurement load of the socket branch by adopting a non-invasive load decomposition and identification algorithm on the voltage and current data of the socket loop;

and calculating the sub-item measuring loads of the air conditioner branch and the lighting branch by adopting a fast discrete Fourier algorithm according to the voltage and current data of the air conditioner and the lighting loop.

The technical scheme of the embodiment of the invention has the following beneficial effects:

1. the invention inherits the advantages of non-invasive measurement method and device in installation and deployment and low maintenance cost, and is only deployed at the distribution box of the user, thereby realizing item collection, centralized analysis and uploading. For the non-invasive behavior of the living environment of the user, a 4G communication mode is adopted, an independent communication channel is arranged, the bandwidth resource of the user is not occupied, and the daily life of the user is zero perception.

2. The invention also has the advantage of accurate independent measurement result, adopts an independent accurate measurement method for high-power multi-state load (air conditioner) and low-power long-time operation load (illumination) which are difficult to solve by a non-invasive method, combines the characteristics of single socket load operation rule and obvious and easily-identified power characteristic, and adopts the non-invasive measurement method to ensure the accuracy of the whole measurement device.

The invention fully utilizes respective advantages of non-invasive measurement and accurate independent measurement to carry out subentry measurement on the residential load electricity consumption, and has the characteristics of scientific and reasonable design, reliable measurement result, reduced installation and maintenance cost and easy realization.

Description of the drawings:

FIG. 1 is a schematic block diagram of a multi-way measuring device for residential load according to an exemplary embodiment;

FIG. 2 is a schematic view showing the installation of a multi-path measuring apparatus for residential load according to the present invention;

fig. 3 is a flow chart illustrating a multi-path measuring method for residential load according to an exemplary embodiment.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.

Fig. 1 is a schematic block diagram illustrating a multi-measuring apparatus for residential load according to an exemplary embodiment. As shown in fig. 1, the multi-path measuring apparatus for residential load according to the embodiment of the present invention includes an analog-to-digital converter, a signal conditioning module, a communication module, a signal processor, a synchronous clock module, a high-speed storage module, and a power conversion module; the input ends of the signal conditioning modules are respectively connected with three analog-to-digital converters, the input ends of the three analog-to-digital converters are respectively connected with current/voltage acquisition units arranged in the socket circuit, the air conditioner circuit and the lighting circuit and used for acquiring voltage and current data of the socket, the air conditioner and the lighting circuit, and the output ends of the signal conditioning modules are connected with the signal processor; the synchronous clock module and the high-speed storage module are respectively connected with a signal processor, and the signal processor is connected with a system master station through a communication module.

As a possible implementation manner of this embodiment, the analog-to-digital converter adopts a 24-bit dual-channel high-speed analog-to-digital converter with model number AD 7746. The analog-to-digital converter adopts a parallel acquisition mode of 3 modules and simultaneously acquires the socket, the air conditioner and the illumination branch, and a single analog-to-digital converter supports 2-channel acquisition and is used for acquiring voltage and current parameters of the same phase at high speed in parallel and keeping the synchronism of acquisition results.

As a possible implementation manner of this embodiment, the signal conditioning module adopts a low-pass filtering module with a model number of B82790C0113N201, and is configured to filter out high-frequency and harmonic signals from the acquired electrical parameters.

As a possible implementation manner of this embodiment, the current/voltage collecting unit includes a voltage transformer and a current transformer of the same class as that of a common electric energy meter. The precision range of the current transformer is determined according to the rated capacity of a scene to be measured.

As a possible implementation manner of the embodiment, the signal processor adopts a digital signal processor with the model number DSPIC33CH128MP 503-I/M5. The digital signal processor respectively processes the electrical parameters of different branches acquired by multiple paths in a subentry manner, wherein the high-frequency acquired original data of the socket branch data give subentry measurement results of all loads on the socket branch by a non-invasive load decomposition and identification algorithm; the high-frequency acquisition original data of the air conditioner and the branch are subjected to an FFT (fast discrete Fourier transform) algorithm to obtain an accurate measurement value result; at the end of each calculation cycle, caching two results to a high-speed storage module through an SPI bus; the digital signal processor and the communication module adopt a high-speed UART interface to carry out data communication, and the measured value result data is uploaded to a system main station.

As a possible implementation manner of this embodiment, the high-speed storage module adopts a high-speed memory with a model number of S25FL512SAGMFI011, and the high-speed memory caches received measurement result data of different loops and loads through an SPI bus protocol.

As a possible implementation manner of this embodiment, the synchronous clock module uses an IC chip with a model number of M48T35Y-70PC1, and the synchronous clock module is connected to the digital signal processor through an I2C bus to perform time tag synchronization for the multi-channel data measurement result, so as to ensure that the uploaded result data is accurately available.

As a possible implementation manner of this embodiment, the communication module is of a model Gport-G4, and communicates with the dsPIC module through a high-speed UART interface, receives result data, waits for a master station command, and uploads different loop measurement data to the system master station through a 4G mode for data analysis and display, where the model is Gport-G4.

As a possible implementation manner of this embodiment, the power conversion module includes an AC-DC power module, which provides direct current power supplies with different voltage levels for the apparatus. The AC-DC power supply module adopts a power supply module with the model number of TEA 1755T.

As a possible implementation manner of this embodiment, the device is installed in a residential distribution box and is used for collecting voltage and current data of a socket, an air conditioner and an illumination loop and monitoring a socket branch, an air conditioner branch and an illumination branch.

As a possible implementation manner of this embodiment, in the process of monitoring the socket branch, a non-invasive measurement method is adopted to perform socket branch monitoring; and an invasive measurement method is adopted in the process of monitoring the air-conditioning branch and the lighting branch to monitor the air-conditioning branch and the lighting branch. Different measuring methods are adopted for different branches, a non-invasive measuring method is adopted for monitoring socket branches, single loads in a state with more types of loads but smaller power on a socket are decomposed and identified, and the air conditioner and the lighting branches are measured in a direct and accurate measuring mode. In the process of carrying out the subentry measurement on the electricity consumption of the load of residents, the advantages of non-invasive measurement and accurate independent measurement are fully utilized, the design is scientific and reasonable, and the measurement result is reliable.

As shown in fig. 2, the device is installed at the entrance of a resident load power supply main, three branches are led out to respectively monitor a socket, an air conditioner and an illumination loop, and a sensor of the device is clamped at a live wire of each branch by adopting an opening CT with standard 100A precision of 0.2%; the measuring result of the socket loop is the subentry measuring result of each load, the measuring results of the air conditioner and the lighting are the results of the air conditioner and the lighting which are independent respectively, and the final result is the subentry measuring result of all the loads of the resident user and is sent to the system main station for demonstration through the device 4G communication.

Fig. 3 is a flow chart illustrating a multi-path measuring method for residential load according to an exemplary embodiment. As shown in fig. 3, the multi-path measuring method for residential load according to the embodiment of the present invention includes the following steps:

collecting voltage and current data of each path of resident load power supply;

performing analog-to-digital conversion on the voltage and current data, and performing filtering processing;

calculating the load of each path of resident load power supply according to the voltage and current data;

and locally storing the load calculation result and uploading the load calculation result to a system main station.

As a possible implementation manner of this embodiment, the voltage and current data of each residential load power supply includes voltage and current data of sockets, air conditioners and lighting circuits.

As a possible implementation manner of this embodiment, the process of calculating the load of each path of power supply of the residential load includes:

calculating the subentry measurement load of the socket branch by adopting a non-invasive load decomposition and identification algorithm on the voltage and current data of the socket loop;

and calculating the sub-item measuring loads of the air conditioner branch and the lighting branch by adopting a fast discrete Fourier algorithm according to the voltage and current data of the air conditioner and the lighting loop.

In the process of calculating the load of each path of resident load power supply, electric parameters of different branches acquired in a multipath way are filtered and sent to a signal processing circuit for processing respectively, wherein high-frequency acquired original data of socket branch data are subjected to a non-invasive load decomposition and identification algorithm to give a subentry measurement result of all loads on the socket branches; the high-frequency acquisition original data of the air conditioner and the branch are subjected to FFT (fast discrete Fourier transform) algorithm to obtain an accurate measurement value result, and in the process of measuring the load electricity consumption of residents in terms, the advantages of non-invasive measurement and accurate independent measurement are fully utilized, so that the design is scientific and reasonable, and the measurement result is reliable.

The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.