CN211856726U - Non-invasive load monitoring system based on optical coupling isolation circuit - Google Patents
Non-invasive load monitoring system based on optical coupling isolation circuit Download PDFInfo
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- CN211856726U CN211856726U CN202020386529.2U CN202020386529U CN211856726U CN 211856726 U CN211856726 U CN 211856726U CN 202020386529 U CN202020386529 U CN 202020386529U CN 211856726 U CN211856726 U CN 211856726U
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Abstract
The utility model discloses a non-intrusive load monitoring system based on optical coupling isolation circuit, which belongs to the field of Internet cloud platform monitoring and comprises distributed hardware nodes, a router, a cloud server and an intelligent terminal, wherein the distributed hardware nodes comprise a power supply circuit port module, a load module, a power metering circuit, an optical coupling isolation module, a CPLD (complex programmable logic device) and MCU (micro control unit) processing unit, a WiFi (wireless fidelity) module, a relay module and a power management circuit module; the utility model designs a power management circuit, a power metering circuit and the like, and uploads the real-time power information of the load to the cloud server through Wi-Fi, and the cloud server can identify the current load type according to a pre-trained classifier, so as to realize the classified metering of the load; load power information is collected in a non-invasive mode, and workload of installation and maintenance is reduced; the load switch can be remotely controlled by means of load identification and running state analysis of the cloud server, so that a user is guided to reasonably plan power utilization, and energy conservation and emission reduction are realized.
Description
Technical Field
The utility model relates to an internet cloud platform control field especially relates to a non-intrusive type load monitoring system based on opto-coupler isolation circuit.
Background
At present, electric energy is one of the most widely and important energy sources in modern production and life. In the aspect of electric energy metering, the traditional 'one-user-one-meter' mode is that an electric power department reads an electric energy meter and gives the current monthly electricity consumption degree, and the disadvantage is that a user cannot know the electricity consumption condition of a specific electric appliance in a certain time period. It can be said that the user has a poor grasp of the dynamic real-time running information of the load set. In order to solve the problem, the traditional invasive monitoring mode is additionally provided with power measurement hardware on each load to be measured, and load operation information is monitored in a one-to-one mode.
A Non-intrusive Load Monitoring System (nims) is a System in which power measurement hardware is installed at a power supply inlet, and the Load operation state can be monitored in a one-to-many manner without destroying the Load hardware structure. But the lack of prior information about the type of the currently accessed load is accompanied by the problem of load type identification.
For the current power electronic industry, the traditional switching power supply is high in cost, the size and the flexibility of the power supply are difficult to guarantee, and particularly for an energy storage system in the new energy industry, a main circuit of the power supply is formed by combining various topological circuits, a plurality of IGBTs are distributed in the system, and a multi-path isolation power supply is required to be used as a driving power supply of the IGBTs. In such a complicated power electronic system, it has been a difficult problem to implement a reliable and stable distributed multi-path isolated power supply. In order to solve these problems, a centralized multi-path isolated power supply is used, and in many power electronic systems, there are not only many points needing isolated power supply but also wide distribution, and how to control these isolated power supplies in a centralized way is a big problem. The conventional centralized multi-path isolation power supply is too far from the power supply to the electric load, the voltage between the multi-path isolation power supplies is too high, the electromagnetic interference is serious, and the system wiring is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough to the background art provides a non-invasive load monitoring system based on opto-coupler isolation circuit, has contained power management circuit, power metering circuit etc. and upload the real-time power information of load to the cloud server through Wi-Fi, and the cloud server can be based on the classifier of training in advance and discern the current load kind, realizes the categorised measurement of load.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a non-invasive load monitoring system based on an optical coupling isolation circuit comprises distributed hardware nodes, a router, a cloud server and an intelligent terminal, wherein the distributed hardware nodes are connected with the cloud server through the router, and the cloud server is connected with the intelligent terminal; the distributed hardware node comprises a power supply road port module, a load module, a power metering circuit, an optical coupling isolation module, a CPLD and MCU processing unit, a first WiFi module, a relay module and a power management circuit module;
the output end of the power supply intersection module is respectively connected with the input end of a load module and the input end of a power management circuit module, the output end of the load module is connected with the input end of a power metering circuit, the output end of the power metering circuit is connected with the input end of an optical coupling isolation module, the output end of the optical coupling isolation module is connected with the input ends of a CPLD and an MCU processing unit, the output ends of the CPLD and the MCU processing unit are respectively connected with the input ends of a first WiFi module and a relay module, and the output end of the relay module is connected with the input end of the power management circuit module;
the optical coupling isolation module comprises an optical coupler U1, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor
And triode V1, the one end of second resistance is connected through first resistance on the IN1 input of opto-coupler U1, the +12V voltage end of opto-coupler U1 is connected to the other end of second resistance, triode V1's collecting electrode is connected through third resistance to opto-coupler U1's positive output end, the one end of fourth resistance and the one end of fifth resistance are connected to opto-coupler U1's negative pole output end, triode V1's base is connected to the other end of fourth resistance, triode V1's projecting pole is connected to the other end of fifth resistance.
As a further preferred scheme of the non-invasive load monitoring system based on optical coupling isolating circuit, power management circuit module adopts from swashing isolated switching power supply.
As the utility model relates to a non-invasive load monitoring system's further preferred scheme based on optical coupling isolating circuit, power metering circuit's chip model is HLW 8012.
As the utility model relates to a non-invasive load monitoring system's further preferred scheme based on opto-coupler isolation circuit, intelligent terminal contains cell-phone, computer and panel.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
1. the utility model designs a power management circuit, a power metering circuit and the like, and uploads the real-time power information of the load to the cloud server through Wi-Fi, and the cloud server can identify the current load type according to a pre-trained classifier, so as to realize the classified metering of the load;
2. the utility model can collect the load power information in a non-invasive way, and reduce the workload of installation and maintenance; the load switch can be remotely controlled by means of load identification and running state analysis of the cloud server, so that a user is guided to reasonably plan power utilization, and energy conservation and emission reduction are realized; faults are eliminated in time, personal safety is guaranteed, property loss is reduced, and the method is a necessary trend for development of the intelligent power grid;
3. the utility model designs and develops a non-invasive load power acquisition device, uploads load power information to the cloud server all weather, and electrically isolates a strong current area and a weak current area, thereby increasing the reliability of hardware nodes; the load type recognition function is realized by means of a cloud server platform, a power value sequence of a common load is trained through PCA in advance, the purposes of feature extraction and dimension reduction are achieved, samples to be recognized are classified by the aid of kNN, and multiple experiments show that the load recognition rate can reach more than 98%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following embodiments or prior arts will be described
While the drawings that are needed to be utilized in the description of the invention have been described briefly, it should be apparent that the drawings in the description that follows are illustrative of the invention
It will be apparent to one of ordinary skill in the art that the embodiments may be practiced without the use of the inventive faculty
From these figures further figures are obtained.
FIG. 1 is a schematic diagram of the overall system structure of the present invention;
FIG. 2 is a schematic diagram of the distributed hardware node of the present invention;
fig. 3 is a schematic diagram of the router of the present invention;
fig. 4 is a circuit diagram of the optical coupling isolation module of the present invention.
Detailed Description
The technical scheme of the utility model is further explained in detail with the attached drawings as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
A non-invasive load monitoring system based on an optical coupling isolation circuit is shown in figure 1 and comprises distributed hardware nodes, a router, a cloud server and an intelligent terminal, wherein the distributed hardware nodes are connected with the cloud server through the router, and the cloud server is connected with the intelligent terminal; the distributed hardware nodes are arranged at each power supply inlet to collect power information of loads, and each node is provided with a Wi-Fi chip for connecting a router; the router forwards the power information of each node to a cloud server through the Internet; the cloud server stores historical power consumption records of different loads on each node, identifies the currently running load according to the trained classifier, and provides an access interface for a user; the user can check the load running state of each power supply inlet through the intelligent terminal network and send a circuit control instruction.
As shown in fig. 2, the distributed hardware node includes a power supply port module, a load module, a power metering circuit, an optical coupling isolation module, a CPLD, an MCU processing unit, a first WiFi module, a relay module, and a power management circuit module; the output end of the power supply intersection module is respectively connected with the input end of the load module and the input end of the power management circuit module, the output end of the load module is connected with the input end of the power metering circuit, the output end of the power metering circuit is connected with the input end of the optical coupling isolation module, the output end of the optical coupling isolation module is connected with the input ends of the CPLD and the MCU processing unit, the output ends of the CPLD and the MCU processing unit are respectively connected with the input ends of the first WiFi module and the relay module, and the output end of the relay module is connected with the input end of the power management circuit module.
When a load is connected to the power supply inlet, the power metering circuit collects the voltage and current effective values of the load and converts the voltage and current effective values into high-frequency pulse signals floating along with alternating current; after the high-frequency pulse signal is isolated from the alternating current by the photoelectric coupler, the CPLD counts the high-frequency pulse by using an equal-precision measurement method; and after the MCU obtains the pulse frequency, the power value is calculated and sent to the cloud server through the Wi-Fi. In addition, when the hardware node receives a control instruction transmitted by the cloud server, the MCU controls the on-off of the relay.
The utility model designs a power management circuit, a power metering circuit and the like, and uploads the real-time power information of the load to the cloud server through Wi-Fi, and the cloud server can identify the current load type according to a pre-trained classifier, so as to realize the classified metering of the load;
the utility model can collect the load power information in a non-invasive way, and reduce the workload of installation and maintenance; the load switch can be remotely controlled by means of load identification and running state analysis of the cloud server, so that a user is guided to reasonably plan power utilization, and energy conservation and emission reduction are realized; faults are eliminated in time, personal safety is guaranteed, property loss is reduced, and the method is a necessary trend for development of the intelligent power grid;
the utility model designs and develops a non-invasive load power acquisition device, uploads load power information to the cloud server all weather, and electrically isolates a strong current area and a weak current area, thereby increasing the reliability of hardware nodes; the load type recognition function is realized by means of a cloud server platform, a power value sequence of a common load is trained through PCA in advance, the purposes of feature extraction and dimension reduction are achieved, samples to be recognized are classified by the aid of kNN, and multiple experiments show that the load recognition rate can reach more than 98%.
As shown in fig. 3, the router includes a second WiFi module, an SD card, a microprocessor module, a ZiGBee chip, and a radio frequency circuit module, where the second WiFi module and the SD card are respectively connected to the microprocessor module, and the microprocessor module is connected to the radio frequency circuit module through the ZiGBee chip;
as shown IN fig. 4, the optical coupling isolation module includes an optical coupler U1, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a triode V1, one end of the IN1 input end of the optical coupler U1 is connected with the second resistor through the first resistor, the other end of the second resistor is connected with the +12V voltage end of the optical coupler U1, the positive output end of the optical coupler U1 is connected with the collector of the triode V1 through the third resistor, the negative output end of the optical coupler U1 is connected with one end of the fourth resistor and one end of the fifth resistor, the other end of the fourth resistor is connected with the base of the triode V1, and the other end of the fifth resistor is connected with the emitter of the triode V1.
The utility model discloses self-excited isolated switching power supply is used for supplying power for opto-coupler, CPLD, MCU, relay and Wi-Fi chip, and single-phase power frequency commercial power adds to second triode Q2 after the half-wave rectification, and second triode Q2 plays the effect of switch, and when second triode Q2 switches on a little, transformer primary winding L1 and L2 will produce the induced electromotive force of opposite direction; when the second transistor Q2 is in saturation, the current in the first inductor L1 increases approximately linearly, and the stable electromotive force generated in the second inductor L2 charges the second capacitor C2; when the second triode Q2 is in an off state, the polarities of the induced electromotive forces in the first inductor L1 and the second inductor L2 are reversed, self-oscillation is finally formed, and voltage-stabilizing filtering is performed in the secondary circuit through the second diode D2 and the electrolytic capacitor C4.
The HLW8012 is a single-phase power metering chip, and meets the accuracy requirement standard of 50/60 HzIEC 687/1036. L _ Relay is the live wire through the Relay, and N is the zero line. Working current is sampled by connecting a 2 m omega constantan resistor RS in series in a load loop, and working voltage is acquired through a resistor network R5-R9. And after the sampling voltage is subjected to voltage-frequency conversion, high-frequency pulse signals CF and CF1 representing voltage, current effective value and active power are output.
The optical coupling isolation circuit is used for converting high-frequency pulses output by the power metering circuit into 3.3V level standard digital pulses and isolating the high-frequency pulses from a strong current region, and the isolated pulses are counted by a CPLD.
The Wi-Fi circuit and the cloud server realize TCP/IP communication. And after receiving the control instruction sent by the terminal, the cloud server forwards the instruction to each node according to the hardware number. And the node receives a switching instruction through the Wi-Fi circuit and controls the connection or disconnection of the load and the power inlet through the relay circuit.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. A non-invasive load monitoring system based on an optical coupling isolation circuit is characterized in that: the system comprises distributed hardware nodes, a router, a cloud server and an intelligent terminal, wherein the distributed hardware nodes are connected with the cloud server through the router, and the cloud server is connected with the intelligent terminal; the distributed hardware node comprises a power supply road port module, a load module, a power metering circuit, an optical coupling isolation module, a CPLD and MCU processing unit, a first WiFi module, a relay module and a power management circuit module;
the output end of the power supply intersection module is respectively connected with the input end of a load module and the input end of a power management circuit module, the output end of the load module is connected with the input end of a power metering circuit, the output end of the power metering circuit is connected with the input end of an optical coupling isolation module, the output end of the optical coupling isolation module is connected with the input ends of a CPLD and an MCU processing unit, the output ends of the CPLD and the MCU processing unit are respectively connected with the input ends of a first WiFi module and a relay module, and the output end of the relay module is connected with the input end of the power management circuit module;
the optical coupling isolation unit comprises an optical coupler U1, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor
And triode V1, the one end of second resistance is connected through first resistance on the IN1 input of opto-coupler U1, the +12V voltage end of opto-coupler U1 is connected to the other end of second resistance, triode V1's collecting electrode is connected through third resistance to opto-coupler U1's positive output end, the one end of fourth resistance and the one end of fifth resistance are connected to opto-coupler U1's negative pole output end, triode V1's base is connected to the other end of fourth resistance, triode V1's projecting pole is connected to the other end of fifth resistance.
2. The non-invasive load monitoring system based on the optical coupling isolation circuit according to claim 1, wherein: the power management circuit module adopts a self-excited isolated switching power supply.
3. The non-invasive load monitoring system based on the optical coupling isolation circuit according to claim 1, wherein: the chip model of the power metering circuit is HLW 8012.
4. The non-invasive load monitoring system based on the optical coupling isolation circuit according to claim 1, wherein: the intelligent terminal comprises a mobile phone, a computer and a tablet.
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| CN202020386529.2U CN211856726U (en) | 2020-03-24 | 2020-03-24 | Non-invasive load monitoring system based on optical coupling isolation circuit |
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| CN202020386529.2U CN211856726U (en) | 2020-03-24 | 2020-03-24 | Non-invasive load monitoring system based on optical coupling isolation circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113784236A (en) * | 2021-11-11 | 2021-12-10 | 深圳华锐金融技术股份有限公司 | Distributed data acquisition monitoring method, device, equipment and medium |
| CN114598722A (en) * | 2022-03-15 | 2022-06-07 | 北京汇智博艺科技有限公司 | Non-invasive load identification and energy consumption monitoring system of Internet of things and implementation method thereof |
| CN115001585A (en) * | 2022-08-02 | 2022-09-02 | 广东东菱电源科技有限公司 | Transmit-receive integrated isolated communication circuit |
-
2020
- 2020-03-24 CN CN202020386529.2U patent/CN211856726U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113784236A (en) * | 2021-11-11 | 2021-12-10 | 深圳华锐金融技术股份有限公司 | Distributed data acquisition monitoring method, device, equipment and medium |
| CN114598722A (en) * | 2022-03-15 | 2022-06-07 | 北京汇智博艺科技有限公司 | Non-invasive load identification and energy consumption monitoring system of Internet of things and implementation method thereof |
| CN115001585A (en) * | 2022-08-02 | 2022-09-02 | 广东东菱电源科技有限公司 | Transmit-receive integrated isolated communication circuit |
| CN115001585B (en) * | 2022-08-02 | 2022-10-25 | 广东东菱电源科技有限公司 | Transmit-receive integrated isolated communication circuit |
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