CN103604962A - S9 multi-module energy meter collecting terminal - Google Patents

Abstract

The present invention relates to an S9 multi-mode electric energy meter collection terminal, the collection terminal includes: a communication module, a central processor and a storage module, the communication module collects the data of the electric meter and transmits the data to the central processing unit, and the central processing unit will receive The data is processed and transmitted to the storage module for storage. The collection terminal retains the fee control function for three-phase users without replacing the three-phase user electricity meters, and at the same time quickly realizes remote information collection, and optimally solves the conflict between remote data collection and fee control of low-voltage three-phase electricity meters The problem.

Description

S9 multi-mode electric energy meter acquisition terminal

technical field

The invention relates to electric power data collection technology, in particular to an S9 multi-mode electric energy meter collection terminal.

Background technique

At present, there are a large number of low-voltage three-phase electric energy meters used by power supply enterprises on site, which are mainly for the billing and measurement of low-voltage three-phase general industrial and commercial (power) users managed by various business units of power supply enterprises, and consume a large amount of electricity. Power supply companies need to settle electricity bills every month based on the electricity consumption of customers. However, remote data collection has not yet been realized for all of these consumer electricity meters, and meter reading personnel need to be dispatched to the site to obtain energy meter data. Manual meter reading is a tedious work that consumes manpower and financial resources, and at the same time, there are shortcomings such as errors in data acquisition, asynchronous meter reading time for billing and line loss calculation, slow meter reading speed, and large user complaints. How to transform these consumer electric meters to obtain the required data on electric energy meters in the simplest way and at the lowest cost, so as to realize remote data collection, has become one of the most urgent problems to be solved in the electric power industry.

At present, power supply enterprises can realize remote data collection by replacing new smart meters, but there are the following problems: 1) the use of funds is very large; 2) the amount of engineering is large, including the purchase and replacement of smart meters, the purchase and replacement of metering boxes, and the account line Purchase and replacement, etc.; 3) Transformation takes a long time. In addition, at present, most of the three-phase smart meters used in the transformation of power supply enterprises are remote cost control meters, which cannot realize the cost control function in a short period of time. If they are replaced, it will inevitably lead to the loss of cost control methods for three-phase users who have been in cost control for many years, which may lead to electricity charge recovery. Difficult unfavorable situations arise.

Contents of the invention

In view of the above deficiencies in the prior art, the present invention provides an S9 multi-mode electric energy meter collection terminal device. This device integrates various communication methods commonly used in the ammeter collection terminals of power supply enterprises at present. On the premise of not replacing the three-phase user ammeter, it retains the fee control function for the three-phase user, and at the same time quickly realizes remote information collection, and optimally solves the low-voltage problem. The problem of conflict between remote data acquisition and cost control of three-phase electric energy meters.

The purpose of the present invention is achieved through the following technical solutions:

S9 multi-mode electric energy meter acquisition terminal, the acquisition terminal includes: a communication module, a central processing unit and a storage module, the communication module collects the data of the electric meter and transmits the data to the central processing unit, and the central processing unit performs the received data Process and transmit to the storage module for storage.

The collection terminal also includes a power supply module for supplying power to the communication module, central processing unit and storage module.

The communication module includes a GPRS module, a wired communication module, a carrier communication module and TD-LTE230.

The central processing unit is also connected with an RS485 communication interface.

The central processing unit is an ARM processor.

The advantages of the present invention are:

The invention can realize remote centralized meter reading, monitoring, electric meter parameter setting and other functions, and can be connected to the main station of the data acquisition system of the power supply enterprise. Realize refined data collection, instant data transmission and intelligent data processing, and comprehensively optimize and transform existing meter reading terminals. At the same time, "S9 multi-mode electric energy meter acquisition terminal" is based on the existing network platform and electric energy meter, without rebuilding the network foundation, saving a lot of infrastructure costs, avoiding redundant construction waste, improving the recovery rate of electricity charges and the utilization rate of human resources, and generally improving electric power marketing Excellent level of service.

Description of drawings

Figure 1: Structural principle diagram of the S9 multi-mode electric energy meter acquisition terminal of the present invention;

Figure 2: Diagram of the independent working mode of the collection terminal without the concentrator;

Figure 3: Work flow chart of acquisition terminal software;

Figure 4: The working mode diagram of the collection terminal working with the concentrator.

Detailed ways

As shown in Figure 1, it is a schematic diagram of the structure of the S9 multi-mode electric energy meter acquisition terminal. The collection terminal includes: a communication module, a central processing unit, a storage module and a power supply module, the communication module collects the data of the electric meter and transmits the data to the central processing unit, and the central processing unit processes the received data and transmits it to the storage unit Module storage. The power supply module is used to supply power to the communication module, the central processing unit and the storage module. The central processing unit is also connected with an RS485 communication interface. The communication module includes a GPRS module, a wired communication module, a carrier communication module and TD-LTE230. In this embodiment, the central processing unit is an ARM processor. Each part of the present invention is described below.

ARM processor

The present invention uses the ARM processor as the STM32 processor, and the STM32 series is based on the ARM Cortex-M3 core specially designed for embedded applications requiring high performance, low cost, and low power consumption. Divided into two different series by performance: STM32F103 "enhanced" series and STM32F101 "basic" series. The clock frequency of the enhanced series reaches 72MHz, which is the product with the highest performance among similar products; the clock frequency of the basic series is 36MHz, and the performance of 16-bit products is greatly improved at the price of 16-bit products, which is the best choice for users of 16-bit products. Both series have built-in 32K to 128K flash memory, the difference is the maximum capacity of SRAM and the combination of peripheral interfaces. When the clock frequency is 72MHz, the code is executed from the flash memory, and the power consumption of STM32 is 36mA, which is the product with the lowest power consumption in the 32-bit market, equivalent to 0.5mA/MHz.

protect the circuit

The present invention is also equipped with protection circuits such as anti-static, anti-lightning, anti-overvoltage, anti-overcurrent, etc., which is very necessary in terms of power data collection, because the environment in which the meter is located has a certain relationship, such as thunder, voltage Instability and other factors will cause the system to be paralyzed or even burned, but with these protection circuits, these situations that cause damage to the system operation will be prevented from happening, and the system will run more stably.

power supply

The power supply part is to supply power to the system. Without power, the system cannot operate, and it is an indispensable part of the whole system. The external mains power is converted into low voltages such as 16V, 5V, 3.3V and other low voltages to provide power to various parts of the system.

storage module

The present invention adopts two 16M large-capacity Flash memories for storing programs and data.

clock module

The acquisition device needs to select the system clock when it is started, but the internal 8MHz crystal oscillator is selected as the CPU clock when it is reset. An external 6MHz clock is selected and will be monitored for success. During this time, the controller is disabled and software interrupt management is subsequently disabled. At the same time, interrupt management of the PLL clock is fully available if required (eg in case of failure of an indirectly used crystal oscillator).

Firmware burning interface

The firmware burning interface of the present invention is used for burning system firmware programs, and can also be used for system debugging.

spare battery

The invention also includes a backup battery, which is used to maintain the clock chip to store the current time when the system is powered off. When the system is powered off, the time is not affected.

infrared communication

The present invention also includes infrared communication equipment, such as an infrared handheld device that can communicate with the system, and is used to set some information of the system, such as: master station address, terminal IP, terminal MAC address, area code, collector address, heartbeat cycle, daily reading Meter time, web page password, manufacturer serial number, etc., can also be used to test some parameters of the system, such as: logic address of the central reading device, connection status with the master station, terminal IP address, terminal MAC address, daily meter reading time, master Station address, heartbeat time, system time, etc., you can also restart the system, synchronize time, etc.

The ARM processor of the S9 multi-mode electric energy meter acquisition terminal communicates with the electric energy meter through RS485 to collect the data of the electric energy meter, and then perform data processing and conversion. It can communicate with TD-LTE230 or RS485 through GPRS, wired communication, carrier communication The master station receives and sends data.

(1) GPRS data transmission module

GPRS is often described as "2.5G", which means that the technology lies between the second generation (2G) and third generation (3G) mobile communication technologies. It provides medium-speed data transmission by utilizing unused TDMA channels in the GSM network. GPRS breaks through the way of thinking that the GSM network can only provide circuit switching, and realizes packet switching only by adding corresponding functional entities and partially transforming the existing base station system. The investment in this transformation is relatively small, but it is obtained The user data rate is quite impressive. Moreover, since the intermediary converter required by the current wireless application is no longer needed, the connection and transmission will be more convenient and easy.

Built-in module technical parameters

MG323 GSM/GPRS wireless built-in module

·Quad frequency module GSM 850/900/1800/1900MHz

·Support TCP/IP protocol

· AT command set

·Support data service, short message service, voice service

·Operating system: Windows2000/XP/VISTA/Win CE/LINUX

·B2B interface

●GSM quad-band

● PNX4851 platform

●50pin B2B interface (compatible with Siemens MC52i)

●Support two serial ports (one full serial port)

●Voltage range 3.4V—4.8V, recommended value 3.8v

●Normal working temperature -20°C~70°C

●GPRS rate, DL: 85.6kbps/ UL: 42.8kbps

●Support 3.0, 1.8V SIM card

●Support analog voice, PCM digital voice is optional;

●Charging function is optional

●ESD performance 4K (contact), 8K (air)

● 8-wire UART port communication, USB port is reserved

The basic commands of the software AT are common, and the extended commands need to be adjusted on the AP side;

Embedded TCP/IP protocol stack; supports establishment of multiple Sockets;

Switch between data mode and command mode +++;

Support CS domain services such as SMS and voice;

Enhance network parameter information query and operator preference settings;

(2) Wired communication module

Wire communication (wire communication), a communication method. In a narrow sense, modern wired communication refers to wired telecommunications, that is, the way of transmitting information by using tangible media such as metal wires and optical fibers. Light or electrical signals can represent sound, text, images, etc. It can be realized by Ethernet.

Ethernet includes the following.

Shared Media: All network devices in turn use the same communication media.

Broadcast domain: The frame to be transmitted is sent to all nodes, but only the addressed node will receive the frame.

CSMA/CD: Carrier Sense Multiple Access/Collision Detection is used in Ethernet to prevent twp or more nodes from sending at the same time.

MAC address: All Ethernet network interface cards (NICs) at the media access control layer use 48-bit network addresses. This address is unique globally.

Ethernet basic network composition:

Shared media and cables: 10BaseT (twisted pair), 10Base-2 (thin coaxial cable), 10Base-5 (thick coaxial cable).

Repeater or Hub: A hub or repeater is a type of device used to receive a large number of Ethernet connections on network devices. The data obtained by the receiving side of a connection is reused and sent to all connected devices in the transmitting side to obtain a transmitting type device.

Bridge: The bridge belongs to the second-layer device, which is responsible for dividing the network into independent conflict domains and segments, so as to achieve the goal of maintaining broadcast and sharing in the same domain/segment. The bridge includes a table of all fragmented and forwarded frames to ensure proper communication behavior in and around the segment.

Switch: A switch, like a bridge, is also a layer 2 device and is a multi-port device. The function supported by the switch is similar to the bridge, but it has the advantage over the bridge that it can temporarily connect any two ports together. A switch includes a switch matrix through which ports can be quickly connected or disconnected. Unlike hubs, switches only forward frames from one port to other ports that are connected to destination nodes and do not contain broadcasts.

Ethernet protocol: The Ethernet frame structure is provided in the IEEE 802.3 standard. Current Ethernet supports fiber optic and twisted pair media.

(3) Carrier communication

Power carrier communication is PLC, which is the abbreviation of English Power line Communication. Power carrier is a unique communication method for power systems. Power carrier communication refers to the technology of using existing power lines to transmit analog or digital signals at high speed through carrier waves. The biggest feature is that there is no need to re-establish the network, as long as there are wires, data transmission can be carried out.

(4) TD-LTE230

The new 230MHz wireless broadband communication system is aimed at the wireless

Communication application requirements, based on LTE core technologies such as OFDM, adaptive coding and modulation, and adaptive retransmission, using existing licensed spectrum resources in the 230MHz frequency band in various industries, innovatively developed and deeply customized wireless data communication systems with independent intellectual property rights, referred to as LTE230 system.

(5) RS485

In addition to the above collection communication methods, the S9 multi-mode collection terminal also has the most basic RS485 collection communication method. Collect the meter data directly through the 485 line and directly report the data to the concentrator through the 485 line. The above communication module can realize the following functions.

1) Data collection function

Data communication: Uplink communicates with the data acquisition master station and receives various instructions. Downlink communicates with single-phase watt-hour meters, three-phase watt-hour meters, multi-tariff meters, etc. through the RS485 interface to collect active peaks, active peaks, active valleys, active valleys, active flats, active totals, and reactive totals.

Real-time acquisition Receive instructions from the data acquisition master station, collect the readings of the specified electric energy meter in real time and upload them to the data acquisition master station.

Freezing data: While reading the meter, the energy meter reading is collected and stored on the data collector, waiting for the data acquisition master station to read it.

Data storage: 12 months of meter reading daily energy meter data can be stored on the data collector.

Remote control: Receive instructions from the data acquisition master station to control the opening and closing of the switch on the power side of the electric energy meter.

2) Data interface function

Collect traditional 485 electric meter data in real time through the RS485 interface. The collected energy meter data is stored in the acquisition terminal in real time, and according to the setting requirements of the master station, the user data is reported to the master station database through the data interface for storage and analysis.

The working mode of the multi-mode electric energy meter collection terminal is introduced below.

1) The collection terminal works independently without going through the concentrator, as shown in Figure 2.

Concentrator is the central management equipment and control equipment of the remote centralized meter reading system. It is responsible for regularly reading and collecting terminal data, command transmission from the master station of the power consumption information collection system, data communication, network management, event recording, and horizontal data transfer. Functions such as transmission, it is a special and most commonly used transponder at the same time. As the central node of network transmission, it connects network nodes in a star topology.

The collection terminal integrates the communication function and the meter reading function, and supports directly uploading data to the main station of the electricity consumption information collection system, and the collection terminal can be used independently without going through the concentrator.

In this working mode, the acquisition terminal uses GPRS, wired communication and TD-LTE230 module to play the function of "connecting the past and the next":

Downlink: communicate with the three-phase prepaid card meter through the 485 interface (also compatible with other smart energy meters).

Uplink: Communicate with the master station of the power consumption information collection system through GPRS, wired communication and TD-LTE230.

In this working mode, the software workflow of the acquisition terminal is shown in Figure 3.

The master station of the electricity consumption information collection system sends a request frame to the collection terminal according to the demand → the collection terminal performs frame format inspection and format conversion after receiving the frame → extracts the command field in the frame and forwards it to the electric energy meter → the electric energy meter responds → the collection terminal communicates with the electric energy meter Frame packaging and data packet format conversion of the response → The acquisition terminal sends a response frame to the master station of the acquisition system for analysis and statistics. The adaptation and conversion of uplink protocol and downlink protocol is completed inside the collection terminal.

2) The collection terminal cooperates with the working mode of the concentrator, as shown in Figure 4.

 Only has the meter reading function, integrates multiple communication modes, supports uploading data to the public transformer concentrator, and the collection terminal is used with the concentrator. the

In this working mode, the acquisition terminal uses the carrier module, and the acquisition terminal does not have the function of directly communicating with the master station, but only plays the role of a collector:

Downlink: communicate with the energy meter through the 485 interface.

Uplink: communicate with the concentrator through the carrier.

In this working mode, the concentrator communicates with the background system through GPRS, accepts the instructions of the background system, and sends data to the background; the concentrator communicates with the acquisition terminal communication module two-way through the carrier according to the background instruction settings, and sends instructions to the communication module.

It should be understood that the above detailed description of the technical solution of the present invention with the aid of preferred embodiments is illustrative rather than restrictive. Those skilled in the art can modify the technical solutions recorded in each embodiment on the basis of reading the description of the present invention, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the corresponding technical solutions Essentially deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (5)

1.S9 multimode electric energy meter acquisition terminal, it is characterized in that, this acquisition terminal comprises: communication module, central processing unit and memory module, described communication module gathers the data of ammeter and sends data to central processing unit, and memory module storage is processed and be transferred to described central processing unit by the data of reception.

2. S9 multimode electric energy meter acquisition terminal according to claim 1, is characterized in that, described acquisition terminal also comprises for the power module to described communication module, central processing unit and memory module power supply.

3. S9 multimode electric energy meter acquisition terminal according to claim 2, is characterized in that, described communication module comprises GPRS module, wire communication module, carrier communication module and TD-LTE230.

4. S9 multimode electric energy meter acquisition terminal according to claim 3, is characterized in that, described central processing unit is also connected with RS485 communication interface.

5. S9 multimode electric energy meter acquisition terminal according to claim 4, is characterized in that, described central processing unit is arm processor.

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