Novel intelligent measuring switch

Abstract

The utility model relates to a novel intelligent measuring switch, which comprises a main board, a protection module and a control module, the protection module MCU is connected with a temperature detection unit, a protection module metering unit and a release unit through an ADC, the release unit and the protection module MCU are also connected through an I / O, the control module comprises a main control module MCU, the main control module MCU is connected with a main control module metering unit through an ADC, and is connected with an HPLC unit, a micro-power wireless unit and a Bluetooth unit through an internal high-speed bus, and the Bluetooth unit is connected with the protection module MCU. The main control module MCU is connected with the RS485 unit and the load identification unit through a UART, and the load identification unit is also connected with the main control module MCU through an SPI. Voltage sampling is carried out through the protection module MCU and the main control module MCU of the protection module and the control module, sampling comparison is carried out, data are more accurate, temperature detection, a load curve and a release are matched, and the reliability of equipment is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to intelligent measurement switch technical field, concretely relates to a novel intelligent measurement switch. BACKGROUND

[0002] With the rapid development of industrial automation, intelligent manufacturing and smart grid and other fields, the demand for high-precision, high-reliability measurement is increasingly urgent. As a key device between the power grid and the control system, the measurement switch undertakes important tasks such as monitoring, feedback and control. Therefore, the traditional measurement switch has been difficult to meet the requirements of modern industry for intelligence, high precision and high reliability. The construction of smart grid puts forward higher requirements for the intelligence and informatization of power equipment. As an important part of smart grid, intelligent measurement switch can realize accurate measurement, remote monitoring and control of electric energy, and provide strong support for the intelligent management of power grid.

[0003] In summary, the prior art measurement switch cannot match the demand of high-precision, high-reliability, load-identification measurement switch for the rapid development of smart grid. SUMMARY

[0004] This part aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract and title of the utility model to avoid obscuring the purpose of this part, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the utility model aims to provide a novel intelligent measurement switch, which can solve the problem that the prior art measurement switch cannot match the demand of high-precision, high-reliability, load-identification measurement switch for the rapid development of smart grid. The utility model provides a novel intelligent measurement switch, which comprises a mainboard, a protection module and a control module. The protection module and the control module are connected to the mainboard through a power supply. The protection module and the control module are connected through a universal asynchronous receiver-transmitter (UART). The protection module comprises a protection module MCU. The protection module MCU is connected to a temperature detection unit, a protection module metering unit and a tripping unit through a digital-to-analog converter (ADC). The tripping unit and the protection module MCU are also connected through an I / O module. The control module comprises a master control module MCU. The master control module MCU is connected to a master control module metering unit through an ADC. The master control module MCU is connected to an HPLC unit, a micro-power wireless unit and a Bluetooth unit through an internal high-speed bus. The master control module MCU is connected to an RS485 unit and a load identification unit through a UART. The load identification unit is also connected to the master control module MCU through an SPI.

[0006] Optionally, the control module further comprises a zero-crossing detection unit and a pulse signal unit connected to the main control module MCU through an I / O module; a FLASH unit connected to the main control module MCU through an SPI; and an RTC unit connected to the main control module MCU through an integrated circuit bus IIC.

[0007] Optionally, the power supply adopts a wide voltage range input of 127-500VAC, and is connected to a 12V tripping unit; the 12V is converted into 3.3V through a DCDC circuit and is connected to the temperature detection unit, the protection module metering unit, the protection module MCU, the RTC unit, the main control module MCU, the zero-crossing detection unit, the pulse signal unit, the FLASH unit, the load identification unit, the RS485 unit, the HPLC unit, the micro-power wireless unit, the Bluetooth unit and the main control module metering unit.

[0008] Optionally, the temperature detection unit is 6 high-precision thermistors.

[0009] Optionally, the protection module MCU is an SPL1050 chip.

[0010] Optionally, the zero-crossing detection unit is a GS1102 special zero-crossing detection chip.

[0011] Optionally, the FLASH unit is a high-speed SPI interface NOR FLASH chip.

[0012] Optionally, the HPLC unit is a high-performance wideband drive chip, and an overcurrent protection unit module and a temperature compensation unit module are integrated in the chip.

[0013] Optionally, the main control module MCU is internally integrated with a Bluetooth module and an HRF module.

[0014] In summary, the utility model has at least one beneficial effect as follows:

[0015] The utility model discloses a double mode (HPLC+HRF) is adopted with concentrator and other equipment to carry out interaction through uplink communication, downlink communication adopts RS485 and sub -device and carries out interaction, and maintenance adopts bluetooth and PC and carries out interaction, and the measurement part is divided into protection module and main control module, and two modules all carry out voltage sampling to protect the precision of measurement, and respectively carry out sampling to protection current and measurement current, cooperate temperature detection, load curve and release ware, greatly promote the reliability of equipment, guarantee the power safety of back end user, can replace manual realization intelligent inspection, reduce the operation and maintenance cost of power grid, improve the reliability and intelligent of electric power acquisition system, load identification function, can judge the back end load type, and the dangerous operation such as indoor battery charging is handled and is closed, protects the life and property safety of user. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing briefly introduce, obviously, below description's drawing only some embodiments of the utility model, for ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0017] Fig. 1 It is a circuit structure schematic view of a novel intelligent measurement switch of the utility model;

[0018] Fig. 2 It is a protection module circuit structure schematic view of a novel intelligent measurement switch of the utility model;

[0019] Fig. 3 It is a main control module circuit structure schematic view of a novel intelligent measurement switch of the utility model;

[0020] List of figure mark: 1, protection module;101, power supply;102, temperature detection unit;103, protection module measurement unit;104, release ware unit;105, protection module MCU;2, main control module;201, RTC unit;202, main control module MCU;203, main control module measurement unit;204, zero-crossing detection unit;205, pulse signal unit;206, FLASH unit;207, HPLC unit;208, micro-power wireless unit;209, bluetooth unit;210, RS485 unit;211, load identification unit. DETAILED DESCRIPTION

[0021] Below combining the drawings of the utility model Figs. 1-3 The utility model is further explained in detail.

[0022] Embodiment one, refer to Figs. 1-3, In order to solve the problem that the prior art measurement switch cannot match the demand of high precision, high reliability and load identification of the high-precision measurement switch in the rapid development of smart grid, the utility model discloses a novel intelligent measurement switch, including mainboard, protection module 1, control module 2, protection module 1 and control module 2 are connected through power supply 101 and mainboard, protection module 1 and control module 2 are connected through general asynchronous receiving and transmitting transmitter UART, protection module 1 includes protection module MCU 105, protection module MCU 105 is connected through digital analog converter ADC and temperature detection unit 102, protection module metering unit 103, tripping unit 104, tripping unit 104 and protection module MCU 105 are also connected through I / O module, control module 2 includes main control module MCU 202, main control module MCU 202 is connected through digital analog converter ADC and main control module metering unit 203, is connected through internal high-speed bus and HPLC unit 207, micro-power wireless unit 208, bluetooth unit 209, is connected through general asynchronous receiving and transmitting transmitter UART and RS485 unit 210, load identification unit 211, load identification unit 211 is also connected through SPI and main control module MCU 202, control module 2 also includes zero-crossing detection unit 204, pulse signal unit 205 connected through I / O module and main control module MCU 202, FLASH unit 206 connected through SPI and main control module MCU 202, RTC unit 201 connected through integrated circuit bus IIC and main control module MCU 202.

[0023] Power supply 101, power supply 101 is connected with mainboard, adopts wide voltage range input 127-500VAC, converts three-phase alternating current power supply into 12V, and then 12V is converted into 3.3V through DCDC circuit. 12V supplies power for reference power supply and tripping unit 104, and 3.3V supplies power for temperature detection unit 102, protection module metering unit 103, protection module MCU 105, RTC unit 201, main control module MCU 202, main control module metering unit 203, zero-crossing detection unit 204, pulse signal unit 205, FLASH unit 206, HPLC unit 207, micro-power wireless unit 208, bluetooth unit 209, RS485 unit 210 and load identification unit 211.

[0024] Temperature detection unit 102 adopts 6 high-precision thermistors, and the thermistors are closely contacted with current copper bars by using specific structure installation mode, measure the temperature on the current copper bars, and further guarantee the safety of electricity, and the temperature measuring range is-40~150 DEG C.

[0025] The protection module metering unit 103 is divided into voltage sampling and current sampling. The current sampling adopts a current transformer, and the voltage sampling adopts resistance voltage reduction. After the current signal and the voltage signal are matched in amplitude by an operational amplifier, they are sent to the protection module MCU 105 for 12-bit high-precision ADC sampling. The protection module MCU 105 internally analyzes and processes the signals to control the tripper unit 104.

[0026] The tripper unit 104 can timely disconnect the tripper when the protection module MCU 105 detects overload, short circuit, overvoltage, undervoltage, and phase loss, etc., to protect the user's safety.

[0027] The protection module MCU 105 adopts an HC32F460KETA chip, an ARMv7-M architecture 32-bit Cortex-M4 CPU, has high-precision ADC, can accurately judge abnormal states, and timely act on the tripper unit 104 to protect the user's safety.

[0028] The RTC unit 201 adopts an IIC clock chip, has a wide voltage input range, low power consumption, high-precision real-time clock, a built-in temperature compensation crystal oscillator, also provides calendar and second interrupt functions, and can continuously work for not less than 10 years.

[0029] The main control module MCU 202 adopts an SPL1050 chip, which is a multifunctional intelligent circuit breaker core control chip. The chip supports the State Grid dual-mode communication standard, G3-PLC standard, BLE5.1 standard, and IR46 metering standard. The chip integrates the State Grid dual-mode communication, Bluetooth, metering, etc. technologies together, and only needs simple peripheral circuits to realize Bluetooth, HPLC, and micro-power wireless functions.

[0030] The main control module metering unit 203 is divided into voltage sampling and current sampling. The current sampling adopts a current transformer, and the voltage sampling adopts resistance voltage reduction. After the current signal and the voltage signal are matched in amplitude by an operational amplifier, they are sent to the main control module MCU 202 for 12-bit high-precision ADC sampling. The main control module MCU 202 internally analyzes and processes the signals to realize voltage, current, active power, reactive power, apparent power, etc. calculation, and further outputs through an optical pulse interface.

[0031] The zero-crossing detection unit 204 adopts a GS1102 special zero-crossing detection chip, cooperates with an optical coupler, and realizes zero-crossing detection of A-phase and N-phase voltages.

[0032] The pulse signal unit 205 is an active, reactive, and second pulse three-way circuit. The active and reactive signals are output after being measured by a metering chip, calculated, and optically coupled. The second pulse signal is a fixed output second interrupt signal of an RTC chip after being optically coupled.

[0033] FLASH unit 206, with large capacity, high reliability, high-speed SPI interface NOR FLASH chip, save calibration parameters, event record, frozen data, etc.

[0034] HPLC unit 207, with high-performance broadband driver chip, integrated with over-current protection, temperature compensation and other unit modules, ensures the stability and reliability of the chip under various conditions, and makes the chip have superior performance in power carrier applications, and through the high-speed bus of the main control module MCU 202 and the internal HPLC module of the main control module MCU 202, data encoding and decoding are realized, and a micro-power wireless circuit is matched to realize dual-mode uplink communication.

[0035] Micro-power wireless unit 208, using the internal HRF module of the main control module MCU 202 and matching the FM8625H radio frequency switch and peripheral transceiver circuit, matching the HPLC circuit to realize dual-mode uplink communication.

[0036] Bluetooth unit 209, using the internal integrated Bluetooth module of the main control module MCU 202, externally matched with a Bluetooth transceiver circuit, compatible with BLE5.1 standard, supporting 1Mbps, 2Mbps, Long Rang 125Kbps and 500Kbps modes.

[0037] RS485 unit 210 has 2-way 485 communication, each RS485 can access at least 32 electric energy meters, the communication rate supports 9600bps, 4800bps, 2400bps, 1200bps, uses high-speed optocoupler for isolation, and 485I can copy meter or automatically switch to maintenance port, and 485II is a meter port.

[0038] Load identification unit 211 has a load identification module, can detect various electric equipment, analyze power consumption composition, can judge air conditioner power consumption, water heater power consumption or indoor battery charging and other various power consumption states, and improve power consumption efficiency and safety.

[0039] Specific implementation principle: the protection module MCU 105 in the protection module 1 and the main control module MCU 202 in the main control module 2 are both integrated with 12bit high-precision ADC for voltage sampling, and the peripheral circuit is matched for level matching, filtering and clamping, and the voltage data of the two channels after collection is processed by arithmetic average and geometric average after software filtering, and the data is more accurate.

[0040] The three-phase voltage in the three-phase alternating current power supply in the power supply 101 has a protection current and a metering current, the protection module 1 samples the protection current output by the current transformer in the current in the three-phase voltage, the main control module 2 samples the metering current output by the high-precision current transformer in the current in the three-phase voltage, the data of the current sampling of the protection module 1 and the main control module 2, the voltage sampling and the temperature sampling of the temperature detection unit 102 are compared, at the moment of overcurrent, overvoltage, overtemperature, phase loss and the like, the tripping device of the tripping device unit 104 can be stably controlled to be attracted and disconnected, the power supply is disconnected in a critical moment, and it is more stable.

[0041] The load identification unit 211 is provided with a special load identification module, the module is built-in with a recognition algorithm, original waveform data transmitted by the main control module MCU 202 is received through SPI, power consumption composition is analyzed, and the recognition result is output through a serial port, a plurality of power consumption states such as air conditioners, washing machines, microwave ovens, water heaters or battery charging can be detected, and power consumption efficiency and safety are improved.

[0042] The above are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A new smart metering switch characterized in that, The application relates to a protection and control module for a power distribution unit, which comprises a main board, a protection module (1) and a control module (2); the protection module (1) and the control module (2) are connected with the main board through a power supply (101); the protection module (1) and the control module (2) are connected through a universal asynchronous receiver-transmitter (UART); the protection module (1) comprises a protection module MCU (105), the protection module MCU (105) is connected with a temperature detection unit (102), a protection module metering unit (103) and a tripping unit (104) through an analog-to-digital converter (ADC); the tripping unit (104) and the protection module MCU (105) are further connected through an I / O module; the control module (2) comprises a master control module MCU (202), the master control module MCU (202) is connected with a master control module metering unit (203) through an ADC, and is connected with an HPLC unit (207), a micro-power wireless unit (208) and a Bluetooth unit (209) through an internal high-speed bus, and is connected with an RS485 unit (210) and a load identification unit (211) through a UART, and the load identification unit (211) is further connected with the master control module MCU (202) through an SPI.

2. A novel smart metering switch according to claim 1, characterized in that, The control module (2) further comprises a zero-crossing detection unit (204) and a pulse signal unit (205) which are connected with the master control module MCU (202) through an I / O module; a FLASH unit (206) which is connected with the master control module MCU (202) through an SPI; and an RTC unit (201) which is connected with the master control module MCU (202) through an integrated circuit bus (IIC).

3. A novel smart metering switch according to claim 2, characterized in that, The power supply (101) adopts a wide voltage range input of 127-500VAC, the power supply (101) is connected with the tripping unit (104) through a 12V power supply, 12V is converted into 3.3V through a DCDC circuit, and the 3.3V is connected with the temperature detection unit (102), the protection module metering unit (103), the protection module MCU (105), the RTC unit (201), the master control module MCU (202), the zero-crossing detection unit (204), the pulse signal unit (205), the FLASH unit (206), the load identification unit (211), the RS485 unit (210), the HPLC unit (207), the micro-power wireless unit (208), the Bluetooth unit (209) and the master control module metering unit (203).

4. A novel smart metering switch according to claim 1, characterized in that, The temperature detection unit (102) is composed of six high-precision thermistors.

5. A novel smart metering switch according to claim 1, characterized in that, The protection module MCU (105) is an SPL1050 chip.

6. A novel smart metering switch according to claim 2, characterized in that, The zero-crossing detection unit (204) is a GS1102 special zero-crossing detection chip.

7. A novel smart metering switch according to claim 2, characterized in that, The FLASH unit (206) is a high-speed SPI interface NOR FLASH chip.

8. A novel smart metering switch according to claim 1, characterized in that, The HPLC unit (207) is a high-performance wideband drive chip, and an overcurrent protection and temperature compensation unit module are integrated in the chip.

9. A novel smart metering switch according to claim 1, characterized in that, The master module MCU (202) is internally integrated with a Bluetooth module and an HRF module.

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