CN207198230U - A non-intrusive residential user current acquisition system - Google Patents

Abstract

The utility model proposes a non-invasive current collection system for residential users, which is characterized in that the system has real-time current collection, analysis and processing functions, including a current transformer, a signal adjustment circuit, a DSP processor TMS320F28335 chip, and an LED display , key control, Ethernet interface, SD memory card and power supply circuit. The current transformer is responsible for transforming the total current signal at the power inlet into a low current signal; the DSP processor TMS320F28335 chip is responsible for performing analog-to-digital conversion on the signal of the signal adjustment circuit, analyzing and processing the sampling data; the LED display is used to display the user load The load waveform of the bus and the power data obtained by analysis and processing; the button control is responsible for controlling the system functions; the Ethernet interface is responsible for uploading the load data processed by DSP to the power department, and the power department uses the load data for online load monitoring and identification; SD storage The card is responsible for storing the sampling data output by the DSP processor in TXT file format; the power supply circuit supplies power to the system.

Description

A non-intrusive residential user current collection system

technical field

The utility model relates to an electric load signal acquisition device, in particular to a non-invasive current acquisition system for residential users.

Background technique

With the improvement of the energy application pattern, social development is increasingly dependent on electric energy. Relying on modern information and communication technology to actively develop smart grids that realize real-time and flexible interaction of power flow and information flow between power grids and users, it has become the focus of the international power industry. common choice. Power load monitoring is the first step to realize the intelligent power technology system. Its monitoring data is not only conducive to improving the load composition, guiding users to formulate reasonable energy-saving plans, but also conducive to the optimal allocation of national power resources. Therefore, it is very necessary to build an efficient power load monitoring system and break through the current bottlenecks such as limited access to load information in the power grid.

Traditionally, "invasive" load monitoring is used to obtain power monitoring data, that is, a sensor is installed on each electrical device inside the load. The monitoring data obtained by this method is accurate and reliable, but the disadvantages are high economic cost, inconvenient maintenance, and difficult Meet the needs of system energy saving, optimization and fault detection.

In order to improve the performance of intrusive load monitoring systems, Hart proposed non-intrusive load monitoring (NILM) in the 1980s, the essence of which is load data collection and identification. The NILM system configures monitoring equipment at the entrance of the power supply to monitor the internal load operation status of the entire power grid. It decomposes the monitored total load information into the information of each electrical equipment, and then obtains the energy consumption of the electrical equipment and the user's power consumption. Law and other electricity consumption information. The prerequisite for realizing the non-intrusive monitoring system is the accurate collection of current data at the load end, so it is of great significance to study the accurate collection of load signals at the user bus.

Contents of the invention

Aiming at the problem of non-invasive load signal collection and monitoring, the utility model provides a non-invasive current collection system for residential users.

For this reason, the utility model provides following technical scheme:

A non-intrusive current acquisition system for residential users, characterized in that the system includes a current transformer, a signal adjustment circuit, a DSP processor TMS320F28335 chip, an LED display, key control, Ethernet interface, SD memory card and a power supply circuit ;

The current transformer is responsible for transforming the total current signal at the power inlet into a low current signal;

The signal adjustment circuit is composed of three parts: an isolation protection circuit, an amplification filter circuit and an amplitude adjustment circuit. The isolation protection circuit is responsible for protecting the circuit. The regulating circuit is responsible for regulating the range of voltage amplitude and outputting 0-3V voltage;

The DSP processor TMS320F28335 chip is responsible for performing analog-to-digital conversion on the voltage signal output by the signal adjustment circuit, and analyzing and processing digital sampling data;

The LED display screen is used to display the load waveform of the user load bus and the electric energy data obtained through analysis and processing;

The key control is responsible for controlling the system functions;

The Ethernet interface is responsible for uploading the load data processed by the DSP to the power department, and the power department uses the load data to carry out load online identification and monitoring;

The SD memory card is responsible for storing the digital signal output by the DSP processor in TXT file format;

The power supply circuit supplies power to the system;

The SD memory card is bidirectionally connected with the DSP processor TMS320F28335 chip;

The beneficial effects of the utility model are: the utility model is simple and feasible, and can effectively solve the problem of accurate collection of non-invasive load signals.

Description of drawings

Fig. 1 is the structural representation of the utility model non-intrusive resident user electric current collection system;

Fig. 2 is a typical application scene diagram of the non-intrusive residential user current collection system of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Figure 1 is a non-invasive residential user current acquisition system, including: 100 current transformer, 101 signal adjustment circuit, 102 DSP processor TMS320F28335 chip, 103 LED display, 104 button control, 105 Ethernet interface, 106 SD memory card and 107 power supply circuit.

The 100 current transformers are responsible for transforming the total current signal at the entrance of the electric load into a low current signal;

The 101 signal adjustment circuit is composed of three parts: an isolation protection circuit, an amplification filter circuit and an amplitude adjustment circuit. The isolation protection circuit is responsible for protecting the circuit. The value adjustment circuit is responsible for adjusting the voltage amplitude range to output 0-3V voltage;

The 102 DSP processor TMS320F28335 chips are responsible for performing analog-to-digital conversion on the voltage signal output by the signal adjustment circuit, and analyzing and processing the sampling data;

The 103 LED display is used to display the load waveform of the user load bus and the electric energy data obtained by analysis and processing;

The 104 button controls are responsible for controlling the system functions;

The 105 Ethernet interface is responsible for uploading the load data processed by the DSP to the power department, and the power department uses the load data to carry out load online identification and monitoring;

The 106 SD memory cards are responsible for storing the digital signal output by the DSP processor in the TXT file format;

The 107 power supply circuit supplies power for the system;

The 106 SD memory cards are bidirectionally connected with 102 DSP processor TMS320F28335 chips.

Figure 2 is a schematic diagram of the system work, the non-intrusive residential user current collection system internal package signal adjustment circuit, DSP processor TMS320F28335 chip, LED display, key control, Ethernet interface, SD memory card and power supply circuit modules, power load entrance The total current at the site is collected by the current transformer, and then input into the non-intrusive residential user current collection system for processing, and finally the load data processed by the DSP is uploaded to the power department through the Ethernet interface, and the power department uses the load data to carry out Load online identification and monitoring.

The above is a detailed introduction to the implementation of the present utility model. The utility model has been described by using specific implementation methods in this paper. The description of the above examples is only used to help understand the system and equipment of the present utility model; at the same time, for the technical field Those of ordinary skill in the art, according to the idea of the utility model, all have changes in the specific implementation and application scope, and all should be covered within the protection scope of the utility model. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (3)

1. A non-intrusive type resident user current acquisition system is characterized in that the system includes a current transformer, a signal adjustment circuit, a DSP processor TMS320F28335 chip, an LED display screen, key control, Ethernet interface, SD memory card and power supply circuit; The current transformer is responsible for converting the total current signal at the power inlet into a low current signal; the signal adjustment circuit is composed of three parts: an isolation protection circuit, an amplification filter circuit and an amplitude adjustment circuit. The isolation protection circuit is responsible for protecting the circuit, and the amplification filter circuit is responsible for amplification. At the same time, the signal amplitude filters out the mixed high-frequency noise in the signal. The amplitude adjustment circuit is responsible for adjusting the voltage amplitude range and outputting 0-3V voltage; the DSP processor TMS320F28335 chip is responsible for analog-to-digital conversion of the output signal of the signal adjustment circuit. Process sampling data; the LED display is used to display the load waveform of the user's load bus and the power data obtained by analysis and processing; the key control is responsible for controlling the system functions; the Ethernet interface is responsible for uploading the load data processed by DSP to the power department, and the power department The load data is used for online load identification and monitoring; the SD memory card is responsible for storing the digital signal output by the DSP processor in the TXT file format; the power supply circuit supplies power to the system. 2. A kind of non-intrusive resident user electric current collection system as claimed in claim 1, is characterized in that, described signal adjustment circuit is made up of three parts of isolation protection circuit, amplification filter circuit and amplitude adjustment circuit, and isolation protection circuit The function is to isolate the input signal and output signal, improve the load capacity of the front-end output voltage of the acquisition system, and at the same time play a role in protecting the circuit to avoid damage to the computing circuit due to the instantaneous high voltage that the current transformer may output; the function of the amplification filter circuit is to amplify The signal amplitude filters out the mixed high-frequency noise in the signal at the same time; the amplitude adjustment circuit adjusts the output voltage amplitude range within 0-3V to protect the analog-to-digital conversion module in the DSP processor TMS320F28335 chip. 3. A kind of non-intrusive residential user electric current collection system as claimed in claim 1, is characterized in that, described SD memory card and DSP processor TMS320F28335 chip two-way connection.