CN212366438U

CN212366438U - Comprehensive measurement and control device

Info

Publication number: CN212366438U
Application number: CN202022649099.1U
Authority: CN
Inventors: 王希印
Original assignee: Nanjing Eaton Electric Power Technology Co ltd
Current assignee: Nanjing Nandun Power Technology Co.,Ltd.
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-01-15
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses a comprehensive measurement and control device, which comprises a CPU main system, an analog input module, a switching value input/output module, a serial communication module and a man-machine conversation module; the CPU main system comprises a DSP chip, an MCU chip and a memory, and the DSP chip and the memory are respectively connected with the MCU chip; the analog input module and the switching value input/output module are respectively connected with the DSP chip, and the serial communication module and the man-machine conversation module are respectively connected with the MCU chip; the analog input module comprises a voltage sampling loop and a current sampling loop, and is connected with the DSP chip after A/D conversion; the device can meet the measurement and control functions of equipment such as incoming and outgoing lines, station service transformers, motors and the like with the voltage level of 10KV and below, and is suitable for being installed in a high-voltage cabinet with a small size. Can also replace the common multifunctional instrument to be arranged in the low-voltage drawer cabinet.

Description

Comprehensive measurement and control device

Technical Field

The utility model relates to a measurement and control device, especially a synthesize measurement and control device.

Background

The measurement and control device on the market is generally larger, powerful but tedious in function, and not suitable for simple measurement and control requirements required by intervals of 10kV or below voltage levels. The low-voltage multifunctional meter installed on the drawer cabinet can not meet the special requirements of users sometimes, except for conventional opening and signal opening, if an overcurrent action outlet is needed, the special requirements cannot be met.

In order to meet the requirements of simple measurement and control and overcurrent action on the measurement and control device, the comprehensive measurement and control device is designed and developed, is not only suitable for interval measurement and control of 10kV and below voltage levels, but also suitable for measurement and control of low-voltage drawer cabinets with special requirements, and has important practical significance.

SUMMERY OF THE UTILITY MODEL

In order to solve the above insufficiency, the utility model provides a synthesize measurement and control device both had been applicable to the interval of 10kV and following voltage class and observed and control, also was applicable to the low pressure drawer cabinet that has special requirement and observes and controls.

The utility model discloses a synthesize measurement and control device, including CPU main system, analog quantity input module, switching value input/output module, serial communication module and man-machine dialogue module.

The CPU main system comprises a DSP chip, an MCU chip and a memory, and the DSP chip and the memory are respectively connected with the MCU chip.

The analog input module and the switching value input/output module are respectively connected with the DSP chip, and the serial communication module and the man-machine conversation module are respectively connected with the MCU chip.

The analog input module comprises a voltage sampling loop and a current sampling loop, and is connected with the DSP chip after A/D conversion.

The switching value input and output module comprises a parallel interface, an optical coupling isolation circuit and a relay, the remote signaling input value is connected with the DSP chip through the parallel interface after passing through the optical coupling isolation circuit, and the DSP chip sends a command and is output by the relay after passing through the parallel interface.

Furthermore, the man-machine conversation module comprises a keyboard and an LCD display screen, and the keyboard and the LCD display screen are respectively connected with the MCU chip.

Furthermore, the serial communication module comprises an independent RS485 interface, and the independent RS485 interface is connected with the MCU chip.

Further, the optical coupling isolation circuit include divider resistance, two opto-couplers and LC filter circuit, divider resistance's one end is optical coupling isolation circuit's input, divider resistance's the other end connects the input of opto-coupler, two opto-couplers are established ties, connect LC filter circuit between the output of two opto-couplers, the both ends of electric capacity are optical coupling isolation circuit's output.

The intelligent control system further comprises a box body, wherein the CPU main system, the analog input module, the switching value input and output module, the serial communication module and the man-machine conversation module are all positioned in the box body.

Has the advantages that: the device can meet the measurement and control functions of equipment such as incoming and outgoing lines, station service transformers, motors and the like with the voltage level of 10KV and below, and is suitable for being installed in a high-voltage cabinet with a small size. Can also replace the common multifunctional instrument to be arranged in the low-voltage drawer cabinet.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention.

Fig. 2 is the optical coupling isolation circuit diagram of the present invention.

Fig. 3 is a schematic diagram of the external structure of the present invention.

Fig. 4 is a schematic view of the back plate structure of the present invention.

100, a box body; 200. a front panel; 300. a rear panel; 201. an LCD display screen; 202. a keyboard.

Detailed Description

As shown in fig. 1, the present invention includes a CPU main system, an analog input module, a switching value input/output module, a serial communication module, and a man-machine interaction module.

The switching value input and output module comprises a parallel interface, an optical coupling isolation circuit and a relay, the remote signaling switching value is connected with a DSP chip through the parallel interface after passing through the optical coupling isolation circuit, and the DSP chip sends a command and is output by the relay after passing through the parallel interface; when the collected current is larger than the set current value, the DSP chip sends a command to the relay through the parallel interface to control the action of the relay.

The man-machine conversation module comprises a keyboard and an LCD display screen, wherein the keyboard and the LCD display screen are respectively connected with the MCU chip and used for realizing parameter setting and data display.

The serial communication module comprises an independent RS485 interface, the independent RS485 interface is connected with the MCU chip and can adapt to shielded twisted-pair communication media, and the measured three-phase voltage, three-phase current, active power, reactive power, apparent power and power factor can be uploaded to an upper computer through the RS485 interface MCU chip.

As shown in fig. 2, the optical coupling isolation circuit include divider resistance, two opto-couplers and LC filter circuit, divider resistance's one end is optical coupling isolation circuit's input, divider resistance's the other end connects the input of opto-coupler, two opto-couplers are established ties, connect LC filter circuit between the output of two opto-couplers, the both ends of electric capacity are optical coupling isolation circuit's output. The optical coupling isolation circuit has the advantages that the used input signal and the output signal are completely isolated electrically, and the anti-interference capability is strong.

As shown in fig. 3, the integrated measurement and control device further includes a box body, wherein the box body includes a box body 100 with openings at two ends, a front panel 200 disposed at a front port of the box body 100, and a rear panel 300 disposed at a rear port of the box body 100. The front panel 200 and the box body 100, and the rear panel 300 and the box body 100 are all fixedly connected by screws. The box body 100 is a cuboid structure with openings at the front end and the rear end. As shown in fig. 4, the rear panel 300 is provided with terminals in an embedded manner, and a gasket is filled between the terminals and the rear panel 300.

The utility model discloses the device is when installing toward the low pressure drawer cabinet, earlier set up the through-hole on the low pressure drawer cabinet door plant, the through-hole size is the same with the size of the 100 cross sections of box body, will the utility model discloses pass in the through-hole on the device follow low pressure drawer cabinet door plant, arrange the through-hole in, the rethread screw is fixed, and is different according to the big or small shape of low pressure drawer cabinet, can select will the utility model discloses horizontal dress or perpendicular dress.

The utility model collects the current and voltage analog quantity for remote measurement display and uploading to the upper computer through communication, and the physical quantity displayed and uploaded to the upper computer by remote measurement comprises three-phase voltage, three-phase current, active power, reactive power, apparent power and power factor; the utility model discloses still designed remote signalling SOE, when power equipment takes place that the remote signalling shifts when the switch shifts, the utility model discloses corresponding telemetering measurement value when can note the time of shifting automatically, the reason shifts, switch tripping operation, like corresponding three phase current, active power etc. form the SOE record to analysis afterwards.

Claims

1. A comprehensive measurement and control device is characterized by comprising a CPU main system, an analog input module, a switching value input/output module, a serial communication module and a man-machine conversation module;

the CPU main system comprises a DSP chip, an MCU chip and a memory, and the DSP chip and the memory are respectively connected with the MCU chip;

the analog input module and the switching value input/output module are respectively connected with the DSP chip, and the serial communication module and the man-machine conversation module are respectively connected with the MCU chip;

the analog input module comprises a voltage sampling loop and a current sampling loop, and is connected with the DSP chip after A/D conversion;

2. The integrated measurement and control device according to claim 1, wherein the human-machine dialogue module comprises a keyboard and an LCD display screen, and the keyboard and the LCD display screen are respectively connected with the MCU chip.

3. The integrated measurement and control device according to claim 1, wherein the serial communication module comprises an independent RS485 interface, and the independent RS485 interface is connected with the MCU chip.

4. The comprehensive measurement and control device according to claim 1, wherein the optical coupling isolation circuit comprises a voltage dividing resistor, two optical couplers and an LC filter circuit, one end of the voltage dividing resistor is an input end of the optical coupling isolation circuit, the other end of the voltage dividing resistor is connected with an input end of the optical couplers, the two optical couplers are connected in series, the LC filter circuit is connected between output ends of the two optical couplers, and two ends of the capacitor are output ends of the optical coupling isolation circuit.

5. The integrated measurement and control device according to claim 1, further comprising a box body, wherein the CPU main system, the analog input module, the switching value input/output module, the serial communication module and the man-machine conversation module are all located in the box body.

6. The comprehensive measurement and control device according to claim 5, wherein the box body comprises a box body with openings at the front end and the rear end, a front panel arranged at the front port of the box body and a rear panel arranged at the rear port of the box body; the front panel and the box body, and the rear panel and the box body are fixedly connected through screws; the box body is of a cuboid structure with openings at the front end and the rear end.

7. The integrated measurement and control device according to claim 6, wherein the keyboard and the LCD display are embedded in the front panel respectively.