CN113067782A - High-reliability electric energy acquisition and transmission system based on redundancy system - Google Patents
High-reliability electric energy acquisition and transmission system based on redundancy system Download PDFInfo
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Abstract
The high-reliability electric energy acquisition and transmission system based on the redundancy system comprises an electric energy acquisition and transmission redundancy system, wherein the electric energy acquisition and transmission redundancy system is arranged between a firewall of a remote master station and an RS485 networking communication network; the electric energy acquisition and transmission redundant system comprises two paths of remote electric energy data terminals which are communicated through Ethernet, and a plane switch is connected to each path of remote electric energy data terminal. By adopting the main and standby remote electric energy data terminal redundancy system, the reliability of the acquisition and transmission of the electric energy data at the station end is improved; in addition, the field redundancy system is simple to modify and upgrade, networking and wiring are not required to be repeated, workload is reduced, and resource reusability of the existing system is improved.
Description
Technical Field
The invention belongs to the field of information communication, and particularly relates to a high-reliability electric energy acquisition and transmission system based on a redundancy system.
Background
Along with the development of social economy, smart power grids and electric power markets, more refined requirements are provided for electric energy metering management, especially the improvement of electric power spot market is promoted, higher requirements are provided for the reliability, accuracy and timeliness of electric energy related data, and as a key ring for main network electric energy acquisition and uploading, the reliability, stability and efficiency of remote electric energy data terminals (remote electric energy data terminals) deployed in substations and power plants are further enhanced. However, at present, only one set of remote electric energy data terminal device is deployed in each voltage class transformer substation and power plant as an electric energy data acquisition and transmission channel, and when the remote electric energy data terminal fails due to various reasons, the whole normal operation of the electric energy acquisition system can be seriously influenced. It becomes necessary to deploy redundant systems to enhance the reliability of the plant-side electrical energy harvesting transmission. However, the construction of the redundant system can not be solved by simply adding a remote electric energy data terminal device, and certain requirements are sometimes required to be provided for the number of communication ports of the electric energy meter according to the actual conditions in the transformer substation and the power plant and the need of re-networking and connecting. On the basis of the existing system, the key of the problem is how to improve the reliability of the electric energy acquisition and transmission system by simple modification.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides a high-reliability electric energy acquisition and transmission system based on a redundancy system, and the reliability of the electric energy data acquisition and transmission at a station end is improved by adopting a main-standby remote electric energy data terminal redundancy system.
Specifically, the high-reliability electric energy acquisition and transmission system based on the redundancy system provided by the embodiment of the application includes:
an electric energy acquisition and transmission redundancy system is arranged between a firewall of a remote master station and an RS485 networking communication network;
the electric energy acquisition and transmission redundant system comprises two paths of remote electric energy data terminals which are communicated through Ethernet, and a plane switch is connected to each path of remote electric energy data terminal.
Optionally, in the electric energy collection and transmission redundancy system:
the two paths of remote electric energy data terminals are in a master-standby mode and are communicated with the master station through one path of switch of the biplane network respectively, and the two paths of remote electric energy data terminals share the RS485 bus and form a communication network with the electric energy meter.
Optionally, in the electric energy collection and transmission redundancy system:
the two paths of remote electric energy data terminals are kept connected through the Ethernet, and the acquisition and synchronization of the electric energy data are ensured by a communication strategy;
when one remote electric energy data terminal breaks down, the whole electric energy data acquisition and transmission are not influenced, and the fault state of the remote electric energy data terminal can be informed to a master station through log information.
Optionally, the ensuring, by the communication policy, acquisition and synchronization of the electric energy data includes:
when the remote electric energy data terminal is started, whether the remote electric energy data terminal is a main device or a standby device is identified according to the configuration file;
if the standby remote electric energy data terminal is the main device, the monitoring service is started, the standby remote electric energy data terminal is waited for active connection, if the standby remote electric energy data terminal does not receive the connection within the set time, the standby remote electric energy data terminal is not available or the standby remote electric energy data terminal fails, the electric energy acquisition and transmission task can be carried out according to the normal flow, and the connection of the standby remote electric energy data terminal can be continuously monitored in the operation process.
Optionally, the ensuring, by the communication policy, acquisition and synchronization of the electric energy data includes:
if the standby remote electric energy data terminal connection is received, sending a heartbeat message, and comparing the latest electric energy data time of the standby equipment with the latest electric energy time of the standby equipment;
and carrying out mutual data synchronization according to the comparison result, then starting an electric energy acquisition task, and carrying out the heartbeat message and data synchronization periodically all the time if the connection with the standby remote electric energy data terminal is kept all the time in the electric energy acquisition process.
Optionally, the ensuring, by the communication policy, acquisition and synchronization of the electric energy data includes:
after the remote electric energy data terminal is started, when the remote electric energy data terminal identifies that the remote electric energy data terminal is standby equipment according to the configuration file, the remote electric energy data terminal is actively connected with main remote electric energy data terminal equipment;
if the main equipment is connected, receiving the periodic heartbeat message and synchronizing the data, and replying confirmation content;
if the main remote electric energy data terminal equipment cannot be connected or the heartbeat message cannot be received within a certain period in the connection process, the main remote electric energy data terminal is considered to be in fault, an electric energy meter acquisition task is started to take over data acquisition, and the main remote electric energy data terminal equipment is also connected regularly in the whole process;
and if the main equipment is connected again, the main remote electric energy data terminal is considered to be cleared of faults, the electric energy meter data collection is stopped, and the state of receiving the periodic heartbeat message and the data synchronization is entered again.
The technical scheme provided by the invention has the beneficial effects that:
firstly, the reliability of the acquisition and transmission of the station-side electric energy data is improved by adopting a main-standby remote electric energy data terminal redundancy system; and secondly, the method ensures that the field redundancy system is simple to modify and upgrade, does not need to re-form network and wire, reduces the workload and improves the resource reusability of the existing system.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-reliability electric energy acquisition and transmission system based on a redundancy system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a system framework proposed in an embodiment of the present application;
fig. 3 is a schematic policy flow diagram of a master/slave remote electric energy data terminal according to an embodiment of the present application.
Detailed Description
To make the structure and advantages of the present invention clearer, the structure of the present invention will be further described with reference to the accompanying drawings.
Example one
Specifically, the high-reliability electric energy collection and transmission system based on the redundancy system provided by the embodiment of the present application, as shown in fig. 1, includes:
an electric energy acquisition and transmission redundancy system is arranged between a firewall of a remote master station and an RS485 networking communication network;
the electric energy acquisition and transmission redundant system comprises two paths of remote electric energy data terminals which are communicated through Ethernet, and a plane switch is connected to each path of remote electric energy data terminal.
In implementation, the high-reliability electric energy acquisition and transmission system based on the redundancy system provided in this embodiment aims to improve the reliability of the electric energy acquisition and transmission system at the plant end, solve the problem that the electric energy meter must be re-networked or replaced when the electric energy acquisition and transmission redundancy system is built in the plant, reduce the workload of on-site modification, and improve the resource reusability of the existing system.
As shown in fig. 2: the basic idea of the invention is to add ERTU devices at a station end to establish an electric energy data acquisition and transmission redundant system, wherein the two ERTU devices are in a master-standby mode and are communicated with a remote master station through a switch, a firewall and a router of a biplane network. The two ERTUs share the RS485 bus and form a communication network with a certain number of electric energy meters, and meanwhile, the two ERTUs are kept connected with each other through the Ethernet, and the acquisition and synchronization of electric energy data are ensured through a certain strategy. When one ERTU fails, the whole electric energy data acquisition and transmission are not influenced, and the fault state of the ERTU can be informed to the master station through log information.
As shown in fig. 3: the method comprises the following steps that when a main device in an ERTU is started, whether the main device is the main device or a standby device is identified according to a configuration file, if the main device is the main device, the steps of reading configuration and initialization are executed, a main station communication service is started, a monitoring service is started at the same time, the standby device in the ERTU is waited to be actively connected, if the connection is not received within the specified time, no standby ERTU device or standby ERTU fault exists, an electric energy meter acquisition task is started only according to a normal flow to carry out an electric energy acquisition and transmission task, but the standby ERTU connection can be continuously monitored in the operation process.
And if the standby ERTU connection is received, starting to send a heartbeat message, inquiring the latest electric energy data time of the standby equipment and the latest electric energy time of the standby equipment, comparing the latest electric energy data time with the latest electric energy time of the standby equipment, judging whether synchronous data are needed according to the comparison result, carrying out mutual data synchronization, starting an electric energy acquisition task, and if the standby ERTU connection is kept all the time in the electric energy acquisition process, carrying out the heartbeat message and the data synchronization all the time periodically.
And after the standby equipment in the ERTU is started, reading the configuration file for initialization, and actively connecting the main equipment in the ERTU when the standby equipment is identified to be the standby equipment, and if the main equipment is connected, preparing to accept various commands. When the receiving period heartbeat message is synchronous with the data, replying the confirmation content. If the ERTU main equipment is not connected or the heartbeat message is not received within a certain period in the connection process, the ERTU main equipment is considered to be in fault, the electric energy meter acquisition task is started to take over data acquisition, the main ERTU equipment is also connected in a timing mode in the whole process, if the ERTU main equipment is connected again, the main ERTU fault is considered to be eliminated, the electric energy meter data acquisition is stopped, and the receiving period heartbeat message and data synchronization state is entered again.
And a set of remote electric energy data terminal device is deployed on the basis of the original remote electric energy data terminal at the station end to establish an electric energy acquisition and transmission redundant system. The double-plane two-path Ethernet line communicated with the main station on the original remote electric energy data terminal is connected to the newly deployed remote electric energy data terminal in one path, and the main station can acquire various data in two sets of remote electric energy data terminal devices at will by using the electric power data network. The two sets of remote electric energy data terminal devices share the RS485 bus to form a communication network with the electric energy meter, in order to prevent RS485 collinear acquisition conflict, one of the remote electric energy data terminal devices is used as main equipment to acquire electric energy meter data at ordinary times, two sets of remote electric energy data terminal devices are communicated and connected through an independent Ethernet port, the main remote electric energy data terminal device is used for synchronizing various acquired electric energy meter data to the standby remote electric energy data terminal device through an Ethernet connecting channel, meanwhile, the heartbeat message is kept between the main remote electric energy data terminal and the standby remote electric energy data terminal, the running state of the opposite side can be known at any time, when the main remote electric energy data terminal equipment fails, the standby remote electric energy data terminal equipment takes over the collection of various data of the electric energy meter and sends a log of the failure of the main remote electric energy data terminal equipment to the master station. When the standby remote electric energy data terminal equipment fails, the main remote electric energy data terminal equipment also sends the log of the failure of the standby equipment to the main station.
Example 1
In a Linux system, in order to achieve the purposes that each sub-application program can be independently developed, the respective coupling is reduced, and the operation is not influenced mutually, the whole system framework adopts an application program containerization deployment scheme, and specifically adopts Doker (one application program)Open sourceApplication container engine) container engine technology, an internet of things MQTT (message protocol based on a publish/subscribe paradigm under ISO standard (ISO/IEC PRF 20922) protocol is adopted for communication among sub-applications, an MQTT-Broker (open source MQTT message server in a publish-subscribe mode) server is deployed in the system, and each application subscribes and publishes a topic through the MQTT-Broker, so that interaction of data and commands is completed, and starting and quitting of a single application cannot affect the operation of the system. The maintenance management of the container and the sub-application programs is in charge of a unified management program, the data storage is unified with a data center application program, the acquisition program and the communication service program interact data with the data center through an MQTT protocol, the system shares a data volume to uniformly store configuration files, and excessive files which do not relate to power failure storage are generated and destroyed in the container by each sub-application program.
The collection program collects electric energy data of the electric energy meter through Ethernet or serial port communication, then the data are issued to the data center program through MQTT-Broker to complete local storage, and the communication service program receives the electric energy data issued by the data center through the MQTT-Broker and then uploads the electric energy data to the master station system.
Meanwhile, the remote electric energy data terminal can also provide parameter configuration and data query functions for the outside by using a WEB configuration program and a liquid crystal interface program.
Example 2
A remote electric energy terminal hardware structure based on container technology comprises a main processor module adopting an A9 chip, a network card module, a communication port module, a storage module, a power supply module and a human-computer interaction module. The communication port module comprises a 5RS232 interface, 15 RS485 interfaces and 6 10M/100M Ethernet interfaces. The RS485 interface supports the access of metering equipment such as more than 20 protocol ammeters and the like.
The main processor module adopts an ARM-Cortex-A9 processor and is provided with a watchdog function, so that software crash can be eliminated. The man-machine interface module is composed of a 7.0 inch 800 × 480 color LCD and a 21-key keyboard, supports the liquid crystal touch function, and can conveniently define, inquire and modify various operation parameters, display various event record data and the like. The power module adopts a high-reliability power module, can realize the input of an alternating current power supply and a direct current power supply, can realize seamless automatic switching, and provides a DC +5V system power supply and a DC +12V system power supply. The memory module adopts built-in FLASH storage, is efficient and stable, and can store various data types in a classified manner. Capacity: 4 gigabytes. And a CF card can be additionally arranged for auxiliary storage, so that important system parameters can be backed up.
The sequence numbers in the above embodiments are merely for description, and do not represent the sequence of the assembly or the use of the components.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The high-reliability electric energy acquisition and transmission system based on the redundancy system is characterized by comprising the following steps:
an electric energy acquisition and transmission redundancy system is arranged between a firewall of a remote master station and an RS485 networking communication network;
the electric energy acquisition and transmission redundant system comprises two paths of remote electric energy data terminals which are communicated through Ethernet, and a plane switch is connected to each path of remote electric energy data terminal.
2. The redundancy system based high reliability electrical energy harvesting and transmission system according to claim 1, wherein in the electrical energy harvesting and transmission redundancy system:
the two paths of remote electric energy data terminals are in a master-standby mode and are communicated with the master station through one path of switch of the biplane network respectively, and the two paths of remote electric energy data terminals share the RS485 bus and form a communication network with the electric energy meter.
3. The redundancy system based high reliability electrical energy harvesting and transmission system according to claim 1, wherein in the electrical energy harvesting and transmission redundancy system:
the two paths of remote electric energy data terminals are kept connected through the Ethernet, and the acquisition and synchronization of the electric energy data are ensured by a communication strategy;
when one remote electric energy data terminal breaks down, the whole electric energy data acquisition and transmission are not influenced, and the fault state of the remote electric energy data terminal can be informed to a master station through log information.
4. The redundancy-based system for high reliability electrical energy collection and transmission system according to claim 3, wherein said ensuring collection and synchronization of electrical energy data by communication strategy comprises:
when the remote electric energy data terminal is started, whether the remote electric energy data terminal is a main device or a standby device is identified according to the configuration file;
if the standby remote electric energy data terminal is the main device, the monitoring service is started, the standby remote electric energy data terminal is waited for active connection, if the standby remote electric energy data terminal does not receive the connection within the set time, the standby remote electric energy data terminal is not available or the standby remote electric energy data terminal fails, the electric energy acquisition and transmission task can be carried out according to the normal flow, and the connection of the standby remote electric energy data terminal can be continuously monitored in the operation process.
5. The redundancy-based system for high reliability electrical energy collection and transmission system according to claim 4, wherein said ensuring collection and synchronization of electrical energy data by communication strategy comprises:
if the standby remote electric energy data terminal connection is received, sending a heartbeat message, and comparing the latest electric energy data time of the standby equipment with the latest electric energy time of the standby equipment;
and carrying out mutual data synchronization according to the comparison result, then starting an electric energy acquisition task, and carrying out the heartbeat message and data synchronization periodically all the time if the connection with the standby remote electric energy data terminal is kept all the time in the electric energy acquisition process.
6. The redundancy-based system for high reliability electrical energy collection and transmission system according to claim 5, wherein said ensuring collection and synchronization of electrical energy data by communication strategy comprises:
after the remote electric energy data terminal is started, when the remote electric energy data terminal identifies that the remote electric energy data terminal is standby equipment according to the configuration file, the remote electric energy data terminal is actively connected with main remote electric energy data terminal equipment;
if the main equipment is connected, receiving the periodic heartbeat message and synchronizing the data, and replying confirmation content;
if the main remote electric energy data terminal equipment cannot be connected or the heartbeat message cannot be received within a certain period in the connection process, the main remote electric energy data terminal is considered to be in fault, an electric energy meter acquisition task is started to take over data acquisition, and the main remote electric energy data terminal equipment is also connected regularly in the whole process;
and if the main equipment is connected again, the main remote electric energy data terminal is considered to be cleared of faults, the electric energy meter data collection is stopped, and the state of receiving the periodic heartbeat message and the data synchronization is entered again.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114173391A (en) * | 2021-12-09 | 2022-03-11 | 河南健创电气科技有限公司 | Method for improving remote transmission reliability of locally acquired information |
| CN114401182A (en) * | 2022-01-06 | 2022-04-26 | 浙江南都能源互联网有限公司 | RS485 power station based main and standby communication method and system |
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