CN218850380U

CN218850380U - Energy efficiency terminal with quick load excision function

Info

Publication number: CN218850380U
Application number: CN202223516779.1U
Authority: CN
Inventors: 张文魁; 郑运东; 张忠祥
Original assignee: Wuhan Guangsheng Electric Co ltd
Current assignee: Wuhan Guangsheng Electric Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-04-11
Anticipated expiration: 2032-12-28

Abstract

The utility model relates to an energy efficiency terminal with rapid load removal function, the input end of the programmable gain amplification module of an electric energy metering chip is electrically connected with the output end of a metering signal conditioning circuit, the input end of the metering signal conditioning circuit is electrically connected with the output end of a sampling circuit for metering, and the input end of the sampling circuit for metering is connected with an alternating voltage current input end; the universal serial transceiver SPI interface of the electric energy metering chip is electrically connected with the MCU processor, the ADC interface of the MCU processor is electrically connected with the output end of the protection signal conditioning circuit, the input end of the protection signal conditioning circuit is electrically connected with the output end of the protection sampling circuit, and the input end of the protection sampling circuit is electrically connected with the alternating current input end. The beneficial effects are that: the load of the power utilization loop can be cut off quickly, the safety power utilization protection function is realized, and the hidden danger that the protection function is realized by periodically reading data in the metering chip in the prior art is avoided.

Description

Energy efficiency terminal with quick load excision function

Technical Field

The utility model relates to an electric power system field, concretely relates to efficiency terminal with quick load excision function.

Background

The problems that the electricity utilization management of residents in China is laggard and the power resources are seriously wasted are that the potential safety hazard is increasingly prominent, and the electricity utilization safety problem is urgently to be solved.

The energy efficiency terminals used at the present stage all adopt the metering chips to collect and meter electric energy parameters, the realization of the protection function is carried out based on the data of the metering chips, the data updating of the metering chips requires time, the MCU also requires time for reading the metering chips, the common period is 1s, the load shedding function cannot be rapidly realized by the existing terminals, and the potential safety hazard exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an efficiency terminal with quick load excision function is provided to overcome not enough among the above-mentioned prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: an energy efficient terminal with a fast load shedding function, comprising: the input end of a programmable gain amplification module of the electric energy metering chip is electrically connected with the output end of a metering signal conditioning circuit, the input end of the metering signal conditioning circuit is electrically connected with the output end of a sampling circuit for metering, and the input end of the sampling circuit for metering is connected with the input end of alternating voltage current; the universal serial transceiver SPI interface of the electric energy metering chip is electrically connected with the MCU processor, the ADC interface of the MCU processor is electrically connected with the output end of the protection signal conditioning circuit, the input end of the protection signal conditioning circuit is electrically connected with the output end of the protection sampling circuit, the input end of the protection sampling circuit is electrically connected with the alternating current input end, and the universal I/O port of the MCU processor is electrically connected with the relay circuit.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the MCU processor, the electric energy metering chip and the relay circuit are respectively electrically connected with the power circuit.

Further, the MCU processor is electrically connected with the SPI interface of the universal serial transceiver transmitter of the storage circuit, and the storage circuit is electrically connected with the power circuit.

Further, a universal serial transmit-receive transmitter USART interface of the MCU processor is electrically connected with the communication circuit, and the communication circuit is electrically connected with the power circuit.

Further, the communication circuit adopts bluetooth communication.

Furthermore, a universal serial transmit-receive transmitter USART interface of the MCU processor is electrically connected with the isolation RS485 circuit, and the isolation RS485 circuit is electrically connected with the power supply circuit.

Furthermore, the sampling circuit for metering adopts a measurement type current transformer to collect current in electric energy metering.

Furthermore, the sampling circuit for protection adopts a protection type current transformer.

The utility model has the advantages that:

1) The protection sampling circuit is used for realizing real-time acquisition of protection current, the acquired protection current is uploaded to the protection signal conditioning circuit, the protection signal conditioning circuit is used for processing after receiving the protection current uploaded by the protection sampling circuit and then uploading the protection current to the MCU processor, the MCU processor is used for calculating the protection current and comparing thresholds, and local quick protection calculation is realized;

2) The MCU processor is connected with the storage circuit through a universal serial transmission and reception (SPI) interface, and system parameters and data reading and storage are realized;

3) The MCU processor can establish data connection with an external mobile terminal through a communication circuit, namely, the MCU processor realizes wireless communication with the external mobile terminal, realizes parameter setting and real-time data query, realizes updating and downloading of local protection parameters, and can configure different protection parameters according to different users, so that application scenes are wider, and the operation is more convenient;

4) The MCU processor can be connected with a background server through an isolation RS485 circuit, remote parameter setting and data query are realized, updating and downloading of protection parameters are realized, different protection parameters can be configured according to different users, the application scene is wider, and the operation is more convenient.

Drawings

Fig. 1 is a circuit diagram of an energy efficient terminal with a fast load shedding function according to the present invention;

fig. 2 is a circuit diagram of the sampling circuit for protection according to the present invention;

fig. 3 is a circuit diagram of the relay circuit of the present invention;

fig. 4 is a circuit diagram of a sampling circuit for metering according to the present invention;

fig. 5 is a circuit diagram of the MCU processor of the present invention;

fig. 6 is a circuit diagram of the isolation RS485 circuit of the present invention;

fig. 7 is a circuit diagram of the communication circuit of the present invention;

fig. 8 is a circuit diagram of the memory circuit of the present invention;

fig. 9 is a circuit diagram of the power supply circuit of the present invention.

In the drawings, the reference numbers indicate the following list of parts:

1. the electric energy metering chip 2, measurement signal conditioning circuit, 3, measurement sampling circuit, 4, MCU treater, 5, protection signal conditioning circuit, 6, protection sampling circuit, 7, power supply circuit, 8, storage circuit, 9, communication circuit, 10, isolation RS485 circuit, 11, relay circuit.

Detailed Description

The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1 to 5, an energy efficient terminal with a rapid load shedding function includes: an electric energy metering chip 1;

the input end of a programmable gain amplification module of the electric energy metering chip 1 is electrically connected with the output end of a metering signal conditioning circuit 2, the input end of the metering signal conditioning circuit 2 is electrically connected with the output end of a metering sampling circuit 3, the input end of the metering sampling circuit 3 is connected with an alternating voltage current input end, and the metering sampling circuit 3 can simultaneously collect the voltage and the current of a 220V single-phase power supply circuit;

the SPI interface of a universal serial transceiving transmitter of the electric energy metering chip 1 is electrically connected with the MCU processor 4, the ADC interface of the MCU processor 4 is electrically connected with the output end of the protection signal conditioning circuit 5, the input end of the protection signal conditioning circuit 5 is electrically connected with the output end of the protection sampling circuit 6, the input end of the protection sampling circuit 6 is electrically connected with the alternating current input end, the protection sampling circuit 6 is used for collecting protection current, and in addition, the universal I/O port of the MCU processor 4 is electrically connected with the relay circuit 11;

the protection sampling circuit 6 realizes real-time collection of protection current, the collected protection current is uploaded to the protection signal conditioning circuit 5, the protection signal conditioning circuit 5 receives the protection current uploaded by the protection sampling circuit 6 and then processes the protection current, the protection current is uploaded to the MCU processor 4, the MCU processor 4 calculates the protection current and compares the protection current with a threshold value, and local quick protection calculation is realized.

Example 2

As shown in fig. 1 and fig. 9, the present embodiment is a further improvement on embodiment 1, and specifically includes the following steps:

MCU treater 4 is connected with power supply circuit 7 electricity, and electric energy metering chip 1 is connected with power supply circuit 7 electricity, and relay circuit 11 is connected with power supply circuit 7 electricity, and power supply circuit 7 provides required electric energy for MCU treater 4, electric energy metering chip 1 and relay circuit 11 promptly.

Example 3

As shown in fig. 1 and fig. 8, this embodiment is a further improvement on

embodiment

1 or 2, and specifically includes the following steps:

MCU treater 4 is connected with memory circuit 8's universal serial transceiver transmitter SPI interface electricity, and MCU treater 4 is connected through universal serial transceiver transmitter SPI interface with memory circuit 8, realizes that system parameter and data read and save, and memory circuit 8 is connected with power supply circuit 7 electricity, and power supply circuit 7 provides required electric energy for memory circuit 8 promptly.

Example 4

As shown in fig. 1 and fig. 7, this embodiment is a further improvement on the

embodiment

1, 2 or 3, and specifically includes the following steps:

the universal serial transmit-receive transmitter USART interface of the MCU processor 4 is electrically connected with the communication circuit 9, the MCU processor 4 can establish data connection with an external mobile terminal through the communication circuit 9, namely, wireless communication is realized with the external mobile terminal, parameter setting and real-time data query are realized, updating and downloading of local protection parameters are realized, different protection parameters can be configured according to different users, so that application scenes are wider, the operation is more convenient, the mobile terminal can be a mobile phone which is installed corresponding to App or a mobile phone which is installed with a WeChat small program, the communication circuit 9 is electrically connected with the power circuit 7, namely, the power circuit 7 provides required electric energy for the communication circuit 9.

In this embodiment, the communication circuit 9 employs bluetooth communication, but it is not excluded to employ 3G communication, 4G communication, 5G communication, etc. in practical applications.

Example 5

As shown in fig. 1 and fig. 6, this embodiment is a further improvement on the basis of

embodiment

1 or 2 or 3 or 4, and specifically includes the following steps:

the universal serial transceiver USART interface of the MCU processor 4 is electrically connected with the isolation RS485 circuit 10, the MCU processor 4 can be connected with a background server through the isolation RS485 circuit 10, remote parameter setting and data query are realized, updating and downloading of protection parameters are realized, different protection parameters can be configured according to different users, application scenes are wider, the operation is more convenient, the isolation RS485 circuit 10 is electrically connected with the power supply circuit 7, namely, the power supply circuit 7 provides required electric energy for the isolation RS485 circuit 10.

Example 6

As shown in fig. 1, this embodiment is a further improvement on any embodiment of embodiments 1 to 5, and specifically includes the following steps:

the measurement sampling circuit 3 adopts a measurement type current transformer to carry out current collection in electric energy measurement, the protection sampling circuit 6 adopts a protection type current transformer, and the measurement type current transformer and the protection type current transformer are both in the prior art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An energy efficient terminal with fast load shedding functionality, comprising: the electric energy metering device comprises an electric energy metering chip (1), wherein the input end of a programmable gain amplification module of the electric energy metering chip (1) is electrically connected with the output end of a metering signal conditioning circuit (2), the input end of the metering signal conditioning circuit (2) is electrically connected with the output end of a metering sampling circuit (3), and the input end of the metering sampling circuit (3) is connected with an alternating voltage current input end; the utility model discloses a protection device for electric energy metering chip, including electric energy metering chip (1), MCU treater (4), ADC interface and protection signal conditioning circuit (5) of MCU treater (4) are connected with the output electricity, the input of protection signal conditioning circuit (5) is connected with the output electricity of sampling circuit (6) for the protection, the input and the alternating current input electricity of sampling circuit (6) for the protection are connected, the general IO mouth and the relay circuit (11) electricity of MCU treater (4) are connected.

2. The energy efficiency terminal with the function of quickly removing the load according to claim 1, characterized in that the MCU processor (4), the electric energy metering chip (1) and the relay circuit (11) are respectively and electrically connected with the power circuit (7).

3. The energy efficient terminal with fast load shedding functionality according to claim 1, characterized in that the MCU processor (4) is electrically connected to the usb transmitter SPI interface of the memory circuit (8), and the memory circuit (8) is electrically connected to the power circuit (7).

4. An energy efficient terminal with fast load shedding functionality according to claim 1 characterized in that the universal serial transmit receive transmitter USART interface of the MCU processor (4) is electrically connected to a communication circuit (9), the communication circuit (9) being electrically connected to a power circuit (7).

5. Energy efficient terminal with fast load shedding functionality according to claim 4, characterized in that the communication circuit (9) employs Bluetooth communication.

6. The energy efficient terminal with the rapid load shedding function according to claim 1, wherein a universal serial transmit receive transmitter (USART) interface of the MCU processor (4) is electrically connected with the isolation RS485 circuit (10), and the isolation RS485 circuit (10) is electrically connected with the power supply circuit (7).

7. The energy efficiency terminal with the function of rapidly removing the load according to claim 1, characterized in that the metering sampling circuit (3) adopts a measurement type current transformer to perform current collection in the electric energy metering.

8. The energy-efficient terminal with the function of rapidly removing the load according to claim 1, characterized in that the protective sampling circuit (6) adopts a protective current transformer.