CN202563675U - Centralizing terminal for energy efficiency data - Google Patents

Abstract

The utility model provides a centralizing terminal for energy efficiency data. The centralizing terminal comprises a master station and an energy efficiency data centralizing terminal connected with the master station, and the master station and the energy efficiency data centralizing terminal are connected through general packet radio service (GPRS) or Ethernet. The centralizing terminal comprises an outer casing, a microprogrammed control unit (MCU) module, a power storage module, a local debugging maintenance module and a communication module. The power storage module and the local debugging maintenance module are connected with the MCU module respectively, and the communication module is connected with the MCU module. All devices are arranged in the outer casing, and an electromagnetic shielding layer is coated on the inner side of the outer casing. According to the centralizing terminal for energy efficiency data, various energy efficiency parameters can be collected through a cluster-type arrangement.

Description

An Energy Efficiency Data Concentration Terminal

technical field

The utility model relates to an energy efficiency collection device in the electrical instrumentation industry, in particular to an energy efficiency data centralized terminal.

Background technique

The lack of basic technology and basic data in the existing technology has brought great obstacles to the overall development of the energy-saving industry. Accurate basic energy efficiency data is the key to evaluating the effect of all energy-saving technologies. At present, the confusion of various energy-saving data and energy-efficiency information has brought many hidden dangers to the energy-saving industry. Therefore, it is urgent to establish a unified energy efficiency data center to obtain comprehensive energy-saving service industry data, provide data support and technical support for the development of the energy-saving industry, monitor energy-saving projects and evaluate energy-saving service agencies, and provide energy-saving policies for the country and government agencies at all levels Provide support.

Accurate energy efficiency basic data mainly depends on on-site real-time collection, which needs to be collected and transmitted by a dedicated centralized terminal. There are many electrical parameters such as phase/line voltage/current, power factor, fundamental wave power, harmonic power, etc. in the actual site. The real-time collection effect of these parameters directly affects the reliability of the energy efficiency analysis results. Therefore, it is urgent to develop a real-time power quality centralized terminal that meets the requirements of industrial site and energy efficiency monitoring.

The utility model with the patent number ZL201020214236.2 discloses a special transformer collection terminal equipped with a modular communication module, which is a device for collecting electric energy information of special transformer users. The long-distance communication module and the signal expansion interface module solidified in the special transformation centralized terminal are designed as plug-in modules, and uniform pins are formulated.

The utility model with the patent number ZL200920069055.2 discloses a wireless data collection terminal, which includes a radio frequency identification module, a main control module and a communication module to realize wireless data collection and wireless transmission.

The utility model with the patent number ZL200920279096.4 discloses a collection terminal for a power management system for easy deployment and expansion.

The utility model with the patent number ZL200920236498.6 discloses a collection terminal for centralized meter reading system of low-voltage power users, which can be operated on the master station to realize remote system update.

The above utility models provide a technical basis for the research and development of power quality centralized terminals, but they do not meet the requirements of cluster deployment, multi-type data collection, and multi-interface transmission to fully adapt to the collection of energy-efficient harmonic power in industrial sites.

Utility model content

In order to overcome the above defects, the utility model provides an energy efficiency data centralized terminal, which can collect various harmonic power parameters through cluster deployment.

To achieve the above purpose, the utility model provides an energy efficiency data centralized terminal, which is connected to the main station through GPRS or Ethernet; the centralized terminal includes: a shell, an MCU module, and a The power storage module and the local debugging and maintenance module are improved in that the communication module connected with the MCU module; all the above modules are arranged in the shell.

In the preferred technical solution provided by the utility model, the MCU module controls the power storage module, the communication module and the local debugging and maintenance module.

In the second preferred technical solution provided by the utility model, the power storage module includes a DC power supply and a data storage.

In the third preferred technical solution provided by the utility model, the local debugging and maintenance module includes an RS232 interface and an infrared interface.

In the fourth preferred technical solution provided by the utility model, the communication module includes an RS485 interface and an expansion interface; the expansion interface can be inserted into a PLC unit or a micropower wireless unit according to communication requirements.

In the fifth preferred technical solution provided by the utility model, the housing is provided with a display device for displaying the collected parameters and an auxiliary terminal for collecting data; the display device is connected to the MCU module, and the auxiliary terminal is connected to the Communication module connection.

In the sixth preferred technical solution provided by the utility model, the GPRS uses a chip whose model is Infineon Tech 7880.

In the seventh preferred technical solution provided by the utility model, the MCU module is a chip with the model number AT91SAM9260.

In the eighth optimal technical solution provided by the utility model, the data memory is a chip of model AT24C64, and the size of the storage space is 64M.

In the ninth preferred technical solution provided by the utility model, the infrared interface adopts a chip with a model number of HS0038B3V.

In the tenth preferred technical solution provided by the utility model, there are 3 RS485 interfaces, the PLC unit is a chip of model 74HTC244, and the micropower wireless unit is a chip of model CC1100.

In the preferred technical solution provided by the utility model, the display device is a 2048-color liquid crystal display with a size of 3.5 inches.

In the second more preferred technical solution provided by the utility model, the time correction adopts a hard clock; the hard clock is connected to the MCU module.

Compared with the existing technology, the technical solution provided by the utility model can solve various energy efficiency problems of the existing thermal type, thermal power type, basic power type, harmonic power type, and power quality power type according to the actual needs of energy efficiency evaluation. The difficulty of data collection and transmission of data centralized terminals has achieved the goal of fully adapting to the concentration and transmission of energy efficiency data on industrial sites, such as cluster deployment, collection of multiple data types, and transmission of multiple interfaces, and provides an accurate energy efficiency basis for energy efficiency data centers data to provide support for the energy-saving policies of the country and government agencies at all levels; in addition, the energy efficiency data centralized terminal also fully considers the needs of different working environments, such as the communication mode can choose micro-power wireless or PLC signal transmission, and realizes intelligence for the future master station The control leaves the expansion interface; moreover, the centralized terminal has strong anti-interference, and the electromagnetic shielding layer adopted has a perfect and careful electromagnetic compatibility design, which can make the centralized terminal operate in harsh environments such as high and low temperature, high pressure and high humidity. Freedom from electromagnetic interference.

Description of drawings

Figure 1 is a schematic diagram of the internal structure of the terminal in the energy efficiency dataset.

Fig. 2 is a schematic diagram of the front part of the centralized terminal housing.

Figure 3 is a rear and side schematic view of the centralized terminal housing.

Figure 4 is a schematic diagram of the auxiliary terminals.

Figure 5 is a remote local schematic diagram of the RS485 interface.

Figure 6 is a remote local schematic diagram of a PLC unit and a micropower wireless unit.

Detailed ways

As shown in Figures 1 to 4, the energy efficiency data concentration terminal includes a host computer and an energy efficiency data concentration terminal connected to the master station through GPRS or Ethernet; Pull-out micro-power wireless unit/PLC adaptive interface, read real-time data, daily frozen data, and curve data of power consumption information, and store 31 daily zero-point (next day zero-point) frozen power data and 12 month-end Freeze power data and curve data at zero point (zero point on the first day of each month); the curve data storage period is fixed at 15 minutes; and communicate with the master station through GPRS or Ethernet. In addition, DC power supply mode and hard clock design are adopted , The temperature, humidity and atmospheric pressure of the working environment all meet the standards of centralized power consumption information terminals, and have perfect and thorough electromagnetic shielding performance. Since there is no billing measurement, high-precision measurement is not required, and the collection accuracy is in accordance with the B-level accuracy of the equipment. One RS232 interface is designed for the energy efficiency centralized terminal, which is used as the local debugging interface and the customer's reading interface for the energy efficiency centralized terminal data. At the same time, one infrared interface is designed to facilitate local maintenance and use. The infrared interface uses a chip with the model number HS0038B3V.

The energy efficiency data centralized terminal uses GPRS or Ethernet to communicate with the main station, and the communication protocol adopts the Q/GDW 376.1-2009 communication protocol specification between the main station and the centralized terminal; the GPRS uses an Infineon Tech 7880 chip.

The energy efficiency data concentration terminal includes a shell, and the shell is provided with a display device for displaying collected parameters and an auxiliary terminal for collecting data; the display device is connected to the MCU module, and the auxiliary terminals are respectively connected to the RS485 interface , PLC unit or micropower wireless unit connection.

Wherein, the power supply adopts a DC power supply mode, because the centralized terminal transmits the energy efficiency data of the entire enterprise, and once a power failure occurs, all data cannot be transmitted, so a DC power supply is used to enhance reliability.

Wherein, the time calibration adopts a hard clock mode, and the hard clock adopts a chip of model DS1302; because the centralized terminal transmits a large amount of data and a long distance, and the transmission requires a strict synchronous clock, the hard clock mode is adopted.

The micro control unit (MCU) adopts AT91SAM9260 with an ARM9 core as the MCU, and the highest frequency of the AT91SAM9260 can reach 180MHZ.

The micro control unit (MCU) module is the core of the whole terminal, and the MCU module is a chip of AT91SAM9260; the MCU module realizes the recording of the following events and the following functions through data calculation and processing: voltage/current curve, Power curve, ABC current/voltage deviation over limit event, voltage loss/current loss event, voltage/current unbalance curve, flicker curve, power daily freeze, power on, power off, reset, phase failure and time calibration .

Wherein, the power-off event refers to a working condition in which the three-phase voltages are all lower than the critical voltage of the electric energy meter, and the load current is not greater than 5% of the rated current.

The voltage loss refers to that in the three-phase power supply system, the load current of a certain phase is greater than the starting current, but the voltage of the voltage line is lower than 78% of the reference voltage of the electric energy meter, and the duration is longer than 1 minute.

The current loss means that in a three-phase power supply system, the three-phase voltage is greater than the critical voltage of the electric energy meter, any phase or two phases of the three-phase current are less than the starting current, and the load current of other phase lines is greater than 5% of the rated current. condition.

The daily freezing of electric energy refers to the notification of the currently frozen electric energy.

The records of voltage/current curves, power curves, ABC current/voltage deviation over-limit events, voltage/current unbalance curves, flicker curves, power-on, zero reset, phase failure and time calibration are all in line with the following national standards: GB12326 -2000 standard, GB12325-2003 standard, GB/T14549-1993 standard, and GB/T 15945-1995 standard.

Wherein, for the curve record, the default time interval for copying is 15 minutes, and other values can be flexibly set.

As shown in Figures 5 and 6, the communication module uses one of the RS485 interface, micropower wireless unit or PLC unit, wherein the RS485 interface is used as the standard configuration interface of the instrument, and the micropower wireless module and PLC module are designed to be pluggable In the form of extended interface, the same interface standard is used on the instrument, so that the corresponding communication module can be used according to different environments and costs.

Wherein, the PLC unit is a chip of model 74HTC244; the micropower wireless unit is a chip of model CC1100.

The specifications of the CC1100 chip are: working frequency band: 402-470mhz; micro-transmission power: maximum transmission power 10mw; sleep current <10ua; the CC1100 chip supports high-precision temperature-compensated crystals, and can perform multiple channels such as 8/16/32 Channel selection and has multiple user interfaces such as rs232/rs485/uart interface, and supports communication rates such as 1200/2400/4800/9600/19200/38400bps, supports communication formats such as 8n1 and 8e1, and can automatically and quickly complete receiving/sending Mode switching, user-friendly.

The energy efficiency data centralized terminal adopts a hard clock time synchronization method, so that the working environment temperature, humidity, and atmospheric pressure all meet the standards of the power consumption information centralized terminal.

Wherein, the data memory uses a chip of the model AT24C64; with the basic power type monitoring terminal parameters as a reference, it is designed to be connected to 100 terminals, and the storage time is 30 days, so the capacity is 30×96×185×100= 51MByte, so the data memory design size is 64M.

Calculated by taking 20 seconds to read 20 data items, each port of the RS485 port and the micro-power wireless unit port can read the data of 3 monitoring terminals per minute. The acquisition period is 15 minutes, and each interface is 15 minutes The data of 45 monitoring terminals can be collected within.

Therefore, in order to meet the requirement that centralized terminals collect more than 100 pieces of monitoring terminal data at a data density of 15 minutes, the monitoring terminal is designed to be evenly connected to three RS485 interfaces or micro-power wireless unit interfaces. When only using micro-power wireless unit communication, At most, the data of 45 monitoring terminals can only be copied within 15 minutes.

The shell of the terminal in the energy efficiency data center is coated with an electromagnetic shielding layer, the electromagnetic shielding layer is formed by a conductive polymer layer, and the conductive polymer layer can be a soluble or dispersible material, such as: polyaniline, polythiophene and poly-p-phenylene; the conductive polymer layer is preferably made of polyethylene dioxythiophene.

The size of the power quality centralized terminal can be: length 260mm to 270mm, width 165mm to 175mm, height 70mm to 80mm; the most preferred size is: length 265mm, width 170mm, height 75mm.

It should be declared that the content and specific implementation of the utility model are intended to prove the practical application of the technical solutions provided by the utility model, and should not be interpreted as limiting the protection scope of the utility model. Under the inspiration of the spirit and principle of the present utility model, those skilled in the art may make various modifications, equivalent replacements, or improvements. But these changes or modifications are all within the protection scope of the pending application.

Claims (13)

1. A centralized terminal for energy efficiency data, the centralized terminal for energy efficiency data is connected to the master station through GPRS or Ethernet; the centralized terminal includes: a shell, an MCU module, a power storage module connected respectively to the MCU module, and local debugging The maintenance module is characterized in that it is a communication module connected to the MCU module; all the above-mentioned modules are arranged in the casing. 2. The centralized terminal according to claim 1, wherein the MCU module controls the power storage module, the communication module and the local debugging and maintenance module. 3. The centralized terminal according to claim 1, wherein the power storage module comprises a DC power supply and a data storage. 4. The centralized terminal according to claim 1, wherein the local debugging and maintenance module includes an RS232 interface and an infrared interface. 5. The centralized terminal according to claim 1, wherein the communication module includes an RS485 interface and an expansion interface; the expansion interface can be inserted into a PLC unit or a micropower wireless unit according to communication requirements. 6. The centralized terminal according to claim 1, wherein the communication module is an RS485 interface, a PLC unit or a micropower wireless unit. 7. The centralized terminal according to claim 1, wherein the housing is provided with a display device for displaying the collected parameters and an auxiliary terminal for collecting data; the display device is connected with the MCU module, and the auxiliary terminal is connected to the MCU module. The terminal is connected with the communication module. 8. centralized terminal according to claim 1, is characterized in that, described GPRS uses the chip that model is Infineon Tech 7880. 9. centralized terminal according to claim 2, is characterized in that, described MCU module is the chip that model is AT91SAM9260. 10. The centralized terminal according to claim 3, wherein the data memory is a chip of AT24C64 type, and the size of the storage space is 64M. 11. The centralized terminal according to claim 4, wherein the infrared interface adopts a chip with a model number of HS0038B3V. 12. The centralized terminal according to claim 6, wherein there are three RS485 interfaces, the PLC unit is a chip of model 74HTC244, and the micropower wireless unit is a chip of model CC1100. 13. The centralized terminal according to claim 7, wherein the display device is a 2048-color liquid crystal display screen with a size of 3.5 inches. the

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