Plant station electric energy acquisition terminal based on M-Bus

Abstract

According to the technical scheme, the M-Bus bus technology, a communication polling mechanism and a communication module identification circuit are adopted in the terminal, all functional modules are connected together, a two-wire system positive electrode and a two-wire system negative electrode do not need to be distinguished, the function expansion capacity of the whole system is enhanced, and the system reliability is improved. The types and the number of functional modules can be expanded according to actual requirements, storage, processing and statistics of electric energy original data of important gateways such as a transformer substation and a power plant are achieved, and finally the data can be transmitted to different electric energy management master stations through multiple communication channels such as Ethernet and 4G. According to the power station electric energy acquisition terminal, high-efficiency operation of acquisition capability, operation speed and uplink and downlink speed of the system is ensured, the problems of poor function expansion capability, poor acquisition capability and insufficient operation speed are solved, and the reliability, stability and accuracy of the power station electric energy acquisition terminal and the marketing analysis and management level of power enterprises are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power station electric energy acquisition, and particularly to a power station electric energy acquisition terminal based on the M-Bus bus. Background Art

[0002] With the continuous development and improvement of the power market, the pressure faced by power enterprises is increasing day by day. It is urgent to improve the speed of meter reading and accounting, reduce the error rate of electricity receivables, and improve the marketing analysis and management level. Therefore, higher requirements are put forward for the acquisition ability, operation speed, function expansion ability, and system stability and reliability of the power station electric energy acquisition terminal. In the current industry, for the upstream communication and downstream acquisition of power station electric energy information, the RS485 bus is generally used. For the two-wire system, it is necessary to distinguish the positive and negative poles of the AB line. Once connected reversely, it cannot work properly. After using the M-Bus bus, there is no need to distinguish the positive and negative poles of the two-wire system, the function expansion ability is enhanced, and the amount of data that can be collected is more abundant, making the power station electric energy acquisition terminal based on the M-Bus bus particularly important. Summary of the Invention

[0003] In view of the deficiencies and defects existing in the prior art, the present invention provides a power station electric energy acquisition terminal based on the M-Bus bus, which can realize the rapid, accurate acquisition, processing, and uploading of electric energy information by using the M-Bus bus.

[0004] The object of the present invention can be achieved by the following technical solutions:

[0005] A power station electric energy acquisition terminal based on the M-Bus bus includes the ability to collect the original electric energy data of important checkpoints such as substations and power plants in real time or at regular intervals, then store, process, and statistically analyze the data, and finally transmit the data to the electric energy management master station through the Ethernet and 4G communication channels. Among them:

[0006] The main control module collects various types of electric energy data in the electric energy meter in real time or at regular intervals, and at the same time classifies, stores, processes, and statistically analyzes the data for the electric energy management master station to call and upload.

[0007] The 485 communication module includes a power indicator light, a module data reception indicator light, a module data transmission indicator light, a communication module identification circuit, and an RS-485 circuit for communicating with the electric energy meter, and can realize the acquisition of various types of electric energy data in the electric energy meter, communication status indication, and transmission of the collected data to the main control module.

[0008] The Ethernet communication module includes a power indicator light, an Ethernet operation status LINK and DATE indicator lights, a communication module identification circuit, and an Ethernet communication circuit, and can realize communication status indication and data transmission to the electric energy management master station.

[0009] The 4G communication module includes a power indicator light, 4G communication NET and T / R indicator lights, a communication module identification circuit, and a 4G module communication circuit, and can realize communication status indication and data transmission to the main station of the electric energy management;

[0010] The B-code time synchronization communication module includes a power indicator light, a module data receiving indicator light, a module data sending indicator light, a communication module identification circuit, and an M-Bus circuit for communicating with the B-code time service device, and can realize communication status indication and receive IRIG-B format electrical interface signals. Direct connection with the B-code time service device can realize continuous time calibration of the main control module;

[0011] Further, the main control module includes an MCU, a NOR Flash, a NAND Flash, and a USB to M-Bus converter. The main control module extends 1 USB bus into 4 M-Bus buses through the USB to M-Bus converter, and respectively exchanges information with the 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module.

[0012] Further, the main control module communicates with the 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module respectively using 4 M-Bus buses, and the working mode is full duplex. The main control module uses a polling method to query the online status of each communication module. Each communication module replies with module type and version information as an answer. The main control module records the online status of the communication module according to the answer, and subsequently only exchanges information with the online module. If the communication module does not reply within 200ms, after accumulating three times, the main control module considers that the communication module is not inserted into the slot or the online communication module has dropped off. The main control module polls all slots every 5S to check whether there is a new communication module inserted into the slot.

[0013] Further, if there are more than 4 expansion modules, the number of USB to M-Bus converters needs to be increased accordingly. For example, if there are 7 expansion modules, the main control module 1 needs to be at least standard-equipped with 2 USBs, generating 8 M-Bus buses. Select 7 of the M-Bus buses to communicate with the modules.

[0014] The beneficial technical effects of the present invention: The entire substation electric energy acquisition terminal is connected together through 4 separate M-Bus buses, which increases the communication rate to 480Mbps. At the same time, the types of functional modules can be added according to needs, enhancing the function expansion ability of the system, ensuring the efficient operation of the system's acquisition ability, computing speed, and uplink and downlink speeds, and solving the problems of poor function expansion ability, poor acquisition ability, and insufficient computing speed. Description of the Drawings

[0015] Figure 1Schematic diagram of the module structure of a substation electric energy acquisition terminal based on the M-Bus bus according to an embodiment of the present invention; Detailed implementation manners

[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0017] The present invention provides a substation electric energy acquisition terminal based on the M-Bus bus. The main control module communicates with the 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module respectively through 4 M-Bus buses. The electric energy management master station interacts with the main control module through the Ethernet communication module and the 4G communication module.

[0018] As Figure 1 shown, a substation electric energy acquisition terminal based on the M-Bus bus according to the present invention includes a main control module 1, a 485 communication module 2, an Ethernet communication module 3, a 4G communication module 4, and a B-code time synchronization communication module 5.

[0019] The main control module 1, through 1 USB bus, and via a USB-to-M-Bus converter, is expanded into 4 M-Bus buses to interact with the 485 communication module 2, the Ethernet communication module 3, the 4G communication module 4, and the B-code time synchronization communication module 5.

[0020] The 485 communication module 2 interacts with the main control module 1 through the extended M-Bus1 and transmits the collected data to the main control module 1. [[ID=ITEMS]]<000XX>

[0021] The Ethernet communication module 3 interacts with the main control module 1 through the extended M-Bus2 and transmits the data collected by the main control module 1 to the electric energy management master station;

[0022] The 4G communication module 4 interacts with the main control module 1 through the extended M-Bus3 and transmits the data collected by the main control module 1 to the electric energy management master station;

[0023] The B-code time synchronization communication module 5 interacts with the main control module 1 through the extended M-Bus4 and continuously calibrates the main control module 1 by receiving the IRIG-B format electrical interface signal.

[0024] In this specification, the various embodiments are described in a progressive manner. The key points of each embodiment are the differences from other embodiments. For the same or similar parts of the various embodiments, reference can be made to each other.

[0025] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A substation electric energy acquisition terminal based on the M-Bus bus, characterized in that, Including: A main control module, a 485 communication module, an Ethernet communication module, a 4G communication module, and a B-code time synchronization communication module. The main control module communicates with the 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module respectively through 4 M-Bus buses, to complete real-time or timed acquisition of the original electrical energy data at important checkpoints such as substations and power plants, then store, process, and statistically analyze the data, and finally transmit the data to the main electrical energy management station through the Ethernet and 4G communication channels.

2. The factory substation electric energy acquisition terminal based on the M-Bus bus according to claim 1, wherein The main control module includes an MCU, a NOR Flash, a NAND Flash, and a USB to M-Bus converter. The converter can expand 1 MCU USB bus into 4 M-Bus buses; the main control module exchanges information with the 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module through the internal M-Bus bus.

3. The factory substation electric energy acquisition terminal based on the M-Bus bus according to claim 1, characterized in that The main control module communicates with the 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module respectively through 4 M-Bus buses, and the working mode is full duplex. The 485 communication module, the Ethernet communication module, the 4G communication module, and the B-code time synchronization communication module identify the slot where the board is located by their respective communication module identification circuits and are mounted on the 4 M-Bus buses. The main control module uses the polling method to query the online status of each communication module. Each communication module replies with the module type and version information as an answer. The main control module records the online status of the communication module according to the answer, and only exchanges information with the online modules subsequently. If the communication module does not reply within 200 ms, after three accumulations, the main control module considers that there is no communication module inserted in this slot or the online communication module has dropped offline. The main control module polls all slots every 5S to check if there is a new communication module inserted into the slot.

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