CN218959057U

CN218959057U - Intelligent measuring switch

Info

Publication number: CN218959057U
Application number: CN202223134812.4U
Authority: CN
Inventors: 林华宝; 罗顺辉; 程树英; 詹超; 谭阿峰; 陈清雷; 金自力; 刘威; 林志文; 李榕桂
Original assignee: Fujian Wangneng Technology Development Co ltd; State Grid Information and Telecommunication Co Ltd
Current assignee: Fujian Wangneng Technology Development Co ltd; State Grid Information and Telecommunication Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-05-02
Anticipated expiration: 2032-11-24

Abstract

The utility model provides an intelligent measuring switch, which comprises a current transformer, a measuring unit module and a temperature control plate, wherein the measuring unit module realizes intelligent measurement and monitoring of high-stability current and voltage by integrating a measuring circuit, a communication circuit and a topology current generating circuit in the module; the measuring unit module adopts a pluggable terminal to realize hot plug with the intelligent measuring switch body, and can be maintained without power failure, thereby improving the convenience of installation and replacement; the temperature control board comprises a temperature measuring module and a protection circuit, and can measure the temperature of the junction of the distribution electric line and the inlet and outlet terminals, thereby improving the use safety.

Description

Intelligent measuring switch

Technical Field

The utility model relates to the field of measurement equipment, in particular to an intelligent measurement switch.

Background

The intelligent measuring switch is an intelligent master of energy information flow and business flow, is a key part of a low-voltage station area, directly relates to safety power utilization, intelligent power utilization and economic power utilization of vast power users, has important social significance and economic value, and is urgently needed to be upgraded in safety and application.

The intelligent measuring switch in the prior art is designed in an integrated manner, the contained measuring functional elements are directly integrated with the body plastic shell, the mechanical life of the common switch body plastic shell is longer than 15 years, but the life of the built-in electronic circuit is about 5-6 years, under the basis of the integrated design, once the built-in electronic circuit fails, the whole intelligent switch needs to be replaced, power failure operation is needed during replacement, resource waste is caused, and the operation and maintenance cost and difficulty are increased.

Disclosure of Invention

In order to solve the above problems in the prior art, the present utility model provides an intelligent measuring switch.

The technical scheme of the utility model is as follows: an intelligent measuring switch comprises a current transformer, a measuring unit module and a temperature control plate, wherein:

the measuring unit module comprises a control unit circuit, a measuring circuit, a topology current generating circuit, a communication circuit, a clock circuit, a power supply module and an external interface, wherein the external interface is subjected to hot plug by adopting a pluggable terminal and an interface on the intelligent measuring switch body;

the control unit circuit is electrically connected with the metering circuit and the topology current generation circuit, the metering circuit is electrically connected with the current transformer, current and voltage signals of the distribution circuit are collected through the current transformer and output to the control unit circuit, and the control unit circuit is electrically connected with the distribution circuit through the topology current generation circuit and is used for automatically identifying the power supply relation topology structure of the transformer area and outputting an identification result to the control unit circuit;

the temperature control board comprises a temperature measuring module and a protection circuit, wherein the temperature measuring module is used for measuring the temperature of the junction of the distribution electric line and the inlet and outlet terminal.

Preferably, the control unit circuit respectively sends an acquisition instruction and an identification instruction to the metering circuit and the topology current generation circuit, receives and transmits the current and voltage signals of the distribution circuit acquired by the metering circuit and the identification result of the topology current generation circuit to the temperature control board of the intelligent measuring switch through the electric connection with the communication circuit.

Preferably, the metering circuit is a metering chip, and the metering circuit is electrically connected with the current transformer to collect current and voltage signals of the distribution circuit after current exchange and electrical isolation of the current transformer.

Preferably, the topology current generating circuit is a topology identification chip, and the topology current generating circuit is electrically connected with the distribution electric line to collect topology household change information, phase sequence information and branch information of the transformer area to automatically identify the power supply relation topology structure of the transformer area.

Preferably, the communication circuit is electrically connected with the control unit circuit and is used for transmitting instructions and data between the circuits, and the communication circuit specifically comprises broadband carrier communication, 485 communication and Bluetooth communication.

Preferably, the clock circuit is a clock chip and is electrically connected with the control unit circuit through I ² And the interface mode of the C bus is used for reading and writing data and is used for timing the control unit circuit.

Preferably, the power module is any one or a combination of more than two of a voltage conversion circuit, a power conversion chip and a battery, and the voltage conversion circuit and the voltage conversion chip are used for converting an externally input voltage into a stable on-board voltage.

Preferably, the protection circuit is electrically connected with the control unit circuit and is used for performing circuit protection in the operation process of the intelligent measuring switch, and the protection circuit comprises an over/under-voltage protection circuit, a three-section type current protection circuit and a phase-failure protection circuit.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model relates to an intelligent measuring switch, wherein a measuring unit module in the intelligent measuring switch adopts a pluggable terminal to an external interface, supports hot plug with an intelligent measuring switch body, can be maintained without power failure, and improves the convenience of installation and replacement;

2. the utility model relates to an intelligent measuring switch, wherein a measuring unit module in the intelligent measuring switch integrates a measuring chip, a topology identification chip and various communication functional components in the measuring unit module, so that the sensing capability and the identification capability of the intelligent measuring switch are improved.

3. The utility model relates to an intelligent measuring switch, wherein a temperature control plate in the intelligent measuring switch comprises a temperature measuring module and a protection circuit, the temperature measuring module can measure the temperature of the junction of an electric distribution line and an inlet and outlet terminal, and the temperature measuring module and the protection circuit are used together to increase the use safety.

Drawings

FIG. 1 is a schematic diagram of the internal frame of a metrology unit module of the present utility model;

fig. 2 is an internal frame diagram of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, the present utility model provides the following technical solutions: an intelligent measuring switch comprises a current transformer, a measuring unit module and a temperature control plate.

The current on the lines is required to be converted into a uniform current for the convenience of measurement, protection and control, and the voltage on the other lines is generally higher because of great current size differences in the lines for power generation, transformation, power transmission, power distribution and power consumption, and on the basis that direct measurement is dangerous, the intelligent measuring switch in the embodiment comprises a current transformer with the functions of current conversion and electrical isolation for the convenience and safety of measuring the current and the voltage on the distribution lines.

The measuring unit module consists of a control unit circuit, a metering circuit, a topology current generating circuit, a communication circuit, a clock circuit and a power supply module, hot plug of the intelligent measuring switch body is realized by adopting a pluggable terminal, in the embodiment, an external interface of the measuring unit module adopts a pluggable terminal with an 8-core spacing of 3.5mm, and signal pin interfaces are respectively a second pulse, an active power pulse, a reactive power pulse, a public end, RS485-A, RS485-B and two reserved ports.

The control unit circuit is a processor, in particular a junzheng X1501 processor, which is electrically connected with the metering circuit, the clock circuit, the communication circuit, the topology current generating circuit and the power module, and is used for sending instructions to the metering circuit, the topology current generating circuit and the communication circuit, receiving the current and voltage information measured by the metering circuit and sending the measured current and voltage information to the temperature control board of the measuring switch through the communication circuit.

The metering circuit is an SDI7768 electric energy metering chip, and high-precision measurement of voltage, current and the like in the distribution line is realized through cooperation with a current transformer;

the topology current generating circuit is a topology identification chip, has a platform region topology user change information acquisition function (product parameter information), a platform region topology phase sequence information acquisition function (A/B/C phase) and a platform region topology branch information acquisition function, and realizes automatic identification of a platform region power supply relation topology structure.

In this embodiment, the communication circuit specifically includes wideband carrier communication, 485 communication, and bluetooth communication, where:

the broadband carrier communication adopts an interconnection HPLC chip, and has the characteristics of high communication rate and good communication performance;

485 communication adopts 485 communication chip, adopts differential transmission mode, and the communication between each node is through a pair (half duplex) or two pairs (full duplex) twisted pair as transmission medium, which realizes the electric isolation with the control unit through the optical coupling isolation chip, and prevents the external surge breakdown control unit;

the Bluetooth communication circuit adopts a Bluetooth module with low power consumption, bluetooth communication signals adopt a distributed network structure and a fast frequency hopping short packet technology, point-to-point and point-to-multipoint communication are supported, the Bluetooth communication circuit works in the global universal 2.4Ghz ISM frequency band, and full duplex transmission is realized by adopting a time division duplex transmission scheme. The Bluetooth communication function can be selected to be started or closed according to the application requirements of the user, and is started by default.

The clock circuit is a clock chip and is electrically connected with the control unit circuit through I ² And the interface mode of the C bus reads and writes data, so that the time setting function of the clock is realized.

The power module is any one or the combination of more than two of a voltage conversion circuit, a power conversion chip and a battery, and the voltage conversion circuit and the voltage conversion chip are used for converting the voltage input from the outside into stable on-board voltage.

The temperature control board comprises a temperature measurement module and a protection circuit, in the embodiment, the temperature measurement module is a low-power consumption CC1310 module wireless power temperature measurement module, the temperature measurement module is used for realizing temperature measurement at the junction of a power distribution circuit and an inlet and outlet terminal, and the protection circuit comprises an over/under-voltage protection circuit, a three-section current protection circuit and a phase-failure protection circuit, wherein:

the over/under voltage protection circuit is an under voltage over voltage protector, if the household power supply is too high or too low, the power-losing armature of the internal coil can be disconnected, so that the intelligent measuring switch is powered off, and the electric appliance connected to the circuit is effectively protected from voltage attack;

the three-section type current protection circuit combines current quick-break protection, time-limited current quick-break protection and time-limited overcurrent protection together to form a stage type current protection circuit, so that faults are quickly and selectively cut off;

the phase-failure protection circuit is used for protecting the phase failure when the power supply is in the phase-failure operation and one arm of the rectifier bridge has no current, and other arms can be seriously over-flowed to cause damage, and meanwhile, the inverter works abnormally.

Claims

1. The utility model provides an intelligence measurement switch which characterized in that includes current transformer, measurement unit module and control by temperature change board, wherein:

2. The intelligent measuring switch according to claim 1, wherein the control unit circuit sends the collection command and the identification command to the metering circuit and the topology current generating circuit respectively, receives and transmits the current, the voltage signal and the identification result of the topology current generating circuit of the distribution circuit collected by the metering circuit to the temperature control board of the intelligent measuring switch through the electric connection with the communication circuit.

3. The intelligent measuring switch according to claim 1, wherein the measuring circuit is a measuring chip, and the measuring circuit is electrically connected with the current transformer to collect current and voltage signals of the distribution circuit after current exchange and electrical isolation of the current transformer.

4. The intelligent measuring switch according to claim 1, wherein the topology current generating circuit is a topology identification chip, and the topology current generating circuit is electrically connected with the distribution circuit to collect topology household change information, phase sequence information and branch information of the transformer area to automatically identify the power supply relation topology structure of the transformer area.

5. The intelligent measuring switch according to claim 1, wherein the communication circuit is electrically connected with the control unit circuit and is used for transmitting instructions and data between the circuits, and the communication circuit specifically comprises broadband carrier communication, 485 communication and bluetooth communication.

6. The intelligent measuring switch according to claim 1, wherein the clock circuit is a clock chip, and is electrically connected to the control unit circuit via I ² And the interface mode of the C bus is used for reading and writing data and is used for timing the control unit circuit.

7. The intelligent measuring switch according to claim 1, wherein the power module is any one or a combination of two or more of a voltage conversion circuit, a power conversion chip and a battery, and the voltage conversion circuit and the voltage conversion chip are used for converting an externally input voltage into a stable on-board voltage.

8. The intelligent measuring switch according to claim 1, wherein the protection circuit is electrically connected with the control unit circuit for performing circuit protection during the operation of the intelligent measuring switch, and the protection circuit comprises an over/under voltage protection circuit, a three-section current protection circuit and a phase-failure protection circuit.