KR100808445B1 - System for inspecting and managing in remote power volume - Google Patents

Abstract

A system for remotely inspecting and managing an electric gauge is provided to allow communication between an electric gauge and a central data terminal to be smoothly made by defining data used in the electric gauge and configuring an object. A system for remotely inspecting and managing an electric gauge includes a COSEM(Companion Specification for Energy Metering) client and a COSEM server. Each of the COSEM client and the COSEM server is provided with a DTE(Data Terminal Equipment) and a DCE(Data Circuit-terminating Equipment). Each of the COSEM client and the COSEM server includes a physical layer, a data link layer, and an application layer. The physical layer is used to access media required for performing communication specification processing with the COSEM client and the COSEM server. The data link layer forms a frame. The application layer supports the transmission of packets of the link layer.

Description

Meter for remote metering and management system {system for inspecting and managing in remote power volume}

1 is a diagram representing a protocol model layer of the electronic electricity meter implemented in the present invention and the linkage system of each layer.

 2 is a diagram representing a typical configuration of data exchange over a wide area network.

 3 is a diagram representing the position of the physical layer in the protocol layer of the client and server.

 4 is a flowchart illustrating a data link layer connection using mode E. FIG.

 5 is a diagram representing the structure and role of the electricity meter application layer.

 6 is a view of the configuration of the object identification checker.

 7 shows an example of using an interface class.

 The present invention relates to a remote meter reading and management system for a meter, and provides a common communication standard of the electronic meter using a variety of communication methods to facilitate communication between different systems and to systematically manage the data of the meter meter and remote meter reading and It relates to a management system.

In particular, the present invention relates to an electricity meter remote meter reading and management system that efficiently manages a variety of data of an electronic electricity meter by providing a relevant and systematic data identification standard system suitable for a network environment such as Korea.

Currently, the meter reading methods include a direct meter reading method by a meter reader and a remote meter reading method for collecting meter reading information remotely. The direct metering method requires a large number of meter readers, takes a lot of time for a series of procedures according to the meter reading and the usage fee notice, and has a disadvantage in that it is not possible to check the failure of the meter.

Recently, in order to solve this problem, efforts have been actively made to develop a remote metering system for facility meters such as electricity, gas, and water. For example, a meter reading method using a wired line such as a leased line or a telephone line has been introduced, and a system for performing meter reading at a remote unit management office by attaching a wireless remote meter to an existing electricity meter has been developed.

 However, for efficient demand management and load control, it is necessary to implement a comprehensive remote metering system. However, as described above, the communication mediums (power lines, cables, wireless, etc.) used for the remote metering are also compatible with various meters. Since the system cannot be guaranteed, the system has to be separated according to the medium.

In addition, it is not possible to guarantee the compatibility between the existing electricity meter and the newly manufactured electricity meter. When introducing a new electricity meter, all the existing electricity meters need to be replaced. Therefore, the additional cost is similar to the system introduction cost. There is a problem that it is difficult to implement a comprehensive and systematic remote meter reading system because the compatibility between the two cannot be guaranteed.

Currently, the electricity meter is diversified in operation environment due to digitalization, high speed, centralization, and new service, and the scale of facilities is increasing day by day. In addition, the situation is changing from simple metering information delivery to providing various additional services, and subscribers also want to receive high quality and various services at a lower price.

 However, the remote meter reading system is configured as a separate system according to the communication method and there is no common communication standard, so interoperability is reduced, and the complexity of the system is further increased.

In other words, it is necessary to establish a common communication standard for the electricity meter as a means for comprehensive and efficient management due to the various communication methods of the electricity meter. Inadequately, comprehensive management of remote meter reading systems is daunting, and only limited management is performed through small, distributed systems running independent, separate management databases that contain unstructured data.

An object of the present invention is to provide a communication standard for communicating data from a plurality of network service modules to a central data terminal (center), and systematic and comprehensive data code standard system for numerous data necessary for remote metering, demand management and load control. To provide.

Another object of the present invention is to provide a communication standard suitable for a variety of remote metering system to facilitate communication regardless of the communication medium or meter.

 In addition, by configuring the data with the same characteristics used in the electricity meter as an object and assigning an identification code to identify each object, it is possible to systematically manage a large amount of data existing in the electricity meter, thereby providing a smooth connection between the electricity meter and the central data terminal. Allow communication.

In order to solve the above technical problem, the constituent means of the present invention, the meter meter remote meter reading and management system, respectively, a remote terminal device (Data Terminal Equipment, DTE) and a remote control device (Data Circuit-Terminating Equipment, DCE) A Companion Specification for Energy Metering (COSEM) client and a COSEM server; The COSEM client and the remote terminal device (DTE) of the COSEM server are each connected to an essential medium to perform communication protocol processing between the COSEM client and the COSEM server at a physical layer, a data link layer, and an application layer. Performing an interface by a communication protocol including a physical layer for the data layer, a data link layer for frame configuration, and an application layer for supporting packet transmission of the link layer; The COSEM client and the remote terminal device (DTE) of the COSEM server are each connected to an application layer of the communication protocol to perform an application process, an application layer of the communication protocol, an application layer, a data link layer, and a physical layer. An application including a management layer management process and a physical connection manager associated with a physical layer of the communication protocol; The remote terminal device (DTE) of the COSEM server, which is a center, measures and manages the electricity meter of the COSEM client that is the consumer side remotely by using the unified communication protocol, but the data having similar characteristics among the data required for the electricity meter. Each object is connected to each other (e.g., metering item, time, meter information, history record, communication settings, low-voltage remote metering and categorized into the categories of specific information) characterized in that it is characterized by managing.

In addition, each of the objects, characterized in that the identification code is assigned to the data including the measurement value required for the remote metering device of the COSEM client, the abstract value used for the setting and the information on the instrument operation.

In addition, the communication protocol is characterized in that the transmission of data acquired by the electronic electricity meter is applied regardless of the transmission medium.

Further, in the communication protocol, the physical layer applies only the optical interface of IEC 62056-21 for field connection, and remote terminal device (DTE) and remote concentrator (DCE) as defined in IEC 62056-42 for remote connection. Follow the standard interface and allow only the connection with HDLC using Mode E among the protocols defined in IEC 62056-21 to perform the necessary media access processing; The data link layer applies the standard of IEC 62056-46 for both remote and field access, and the Logical Link Control (LLC) sublayer and Medium Access Control to ensure that it is the data link layer for both connection-oriented and disconnected modes. (MAC) subdivided into layers to perform processing for frame construction; The application layer is characterized by supporting the packet transmission of the data link layer by applying the standard of IEC 62056-53.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention meter meter remote meter reading and management system consisting of the above configuration means.

For comprehensive management of the remote meter reading and management system, the transmission of data acquired by the electronic electricity meter must be carried out regardless of the medium, and in accordance with consistent regulations.

Therefore, all communication protocols required for data transmission through various types of communication media should be defined for demand and load control, remote meter reading and customer information collection. The design of the communication protocol should be based on the analysis of the required performance of data exchange, the components of the network, and the applied system.

This requires a separate standard-setting body and requires a long time experiment and deliberation procedure. Therefore, the method to circumvent this is to refer to the international regulations for the exchange of meter data, and to define the procedure as appropriate for the domestic situation. to be.

The present invention has been invented based on IEC 62056, a dedicated standard for the exchange of meter data. The hierarchical structure follows the model of OSI, but consists of three layers by selecting elements essential for data transmission.

The hierarchical structure defines the exchange of data between the instrument and the modem, eliminating the need for the network and transport layers responsible for network access, termination management, error recovery, and flow control. It does not use a session layer, and only a small portion of the presentation layer, which is responsible for encrypting, compressing, and reconstructing data, can be processed by the application layer.

Therefore, we propose a protocol consisting of the physical layer for accessing essential media, the data link layer for frame composition, and the application layer supporting packet transmission of the link layer. The standard defined in this way is applicable to the transmission of meter reading data regardless of the manufacturer of the electricity meter. 1 and 3 represent a protocol model of such a power meter. In addition, in FIG. 1, the physical layer and the data link layer of the communication protocol are connected to each other to separate a data communication request (PH-DATA.request), a data communication indication (PH-DATA.indication), and a physical layer connection at the physical layer. (release) Performs the indication (PH-ABORT.indication). The data link layer and the application layer are connected to each other to provide connection / separation and data related services. The application layer of the communication protocol and the application process of the application are connected to each other to provide an ASO (Address Supporting Organization) service. In addition, the layer management process of the application provides a physical layer management service in connection with the physical layer of the communication protocol, provides a data link layer management service in connection with the data link layer, and provides an application layer management service in connection with the application layer. . The application's physical connection manager is also associated with the physical layer to provide the physical layer connection request (PH-CONNECTION.request), physical layer connection confirmation (PH-CONNECTION.confirm), and physical layer connection indication (PH-CONNECTION.indication). , Physical layer connection separation request (PH-ABORT.request), physical layer connection separation confirmation (PH-ABORT.confirm), physical layer connection separation indication (PH-ABORT.indication), and data communication requests at the physical layer (PH-DATA.request) and data communication indication (PH-DATA.indication).

<Physical layer>

 2 illustrates a typical configuration of data exchange over a wide area network. In case of field connection, only the optical interface of IEC 62056-21 is applied, and in case of remote connection, follow the standard interface between DTE and DCE as defined in IEC 62056-42. Among the protocols defined in IEC 62056-21, only HDLC using Mode E is allowed, so that the same protocol can be applied for on-site and remote access. 4 shows a data link layer connection using Mode E. FIG.

<Data link layer>

 The same standard applies to both remote and field access. The applicable standard uses IEC 62056-46. To ensure that it is a data link layer for both connection-oriented and connectionless modes, it is divided into a Logical Link Control (LLC) sublayer and a Medium Access Control (MAC) sublayer.

<Application layer>

 The standard applied to the application layer is IEC 62056-53, which specifies the architecture and services for the Companion Specification for Energy Metering (COSEM) clients and servers, and the COSEM application layer by protocol. 5 shows the structure of the COSEM application layer.

<Application process>

 Regulations on the definition and processing of meter information IEC 62056-61 and IEC 62056-62 are applied and specify the items for object identification system (OBIS) suitable for meter. The object identification system defines unique identification codes (ID-codes) for all data, including the measurement values required for remote metering devices, the abstract values used for configuration, and information about instrument operation.

The object identification identifier is composed of six hierarchical groups as shown in FIG. All groups except group A are 1 byte. Group A is used to identify the characteristics of the data. For example, it indicates whether it is data related to electricity or data related to gas.

Group B represents the number of channels, i.e. the number of input terminals (central devices) of the meter. Group C is determined according to Group A and defines physical data such as voltage, current and temperature. Group D is determined by Groups A and C and defines the results of the processing of physical data. Group E represents fare class. Group F defines time information of data. For example, it indicates whether it is data of the current month or the previous month.

 Communication interfaces are defined using object-oriented methods in the form of interface classes for designing instruments with simple to complex functions. The objects used in the interface classes facilitate the communication between the meter, auxiliary equipment, and other components of the system.

Objects are composed of properties and methods. Information about an object is represented by attributes, and the characteristics of an object are represented by values of attributes. Objects also provide a way to test or change the value of an attribute. The value of an attribute can affect the behavior of an object. The first property of every object is "logical_name" as part of the object identifier.

At this time, the ID code used as the value of logical_name is used to identify the logical name of the object, the data transmitted through the communication line, and the data displayed on the instrument. The following shows the object that matches the data and the identification code to identify the object.

7 shows an example of using an interface class. The property of the register can be known from the "logical_name" object identifier (see IEC 62056-61). The attribute "value" contains the actual contents of the register. Defining a particular instrument means defining a register.

In Figure 7, the instrument has two registers, in which case it creates two COSEM objects (register classes). One COSEM object is a register for cumulative reactive power and the other is a register for cumulative reactive power.

 In the present invention, the data required for the electronic electricity meter is largely divided into five categories of metering items, time, meter information, history records, communication settings, and specific information for low pressure remote meter reading, and in each category, objects necessary for the remote meter reading system are defined. And an identification code and an interface class have been assigned.

Each object is provided with clarity of data by assigning an individual interface structure and assigning an identification code. Such object identification systems enable clarity of data so that intercommunication between meters, auxiliary equipment and other components of the system can be facilitated.

According to the present invention, by defining data used in the electricity meter and constructing an object, it is possible to facilitate communication between the electricity meter and the central data terminal regardless of a medium.

It also helps to deliver the necessary information with a small amount of data by constructing objects and assigning identification codes to fit the real-time tariff system.

In addition, by providing a data frame system for various types of electricity meters, it helps to facilitate communication between electricity meters and guarantees compatibility with electricity meters around the world.

Claims (4)

In the electricity meter remote meter reading and management system, A COSEM client and a COSEM server each having a remote terminal device (DTE) and a remote concentration device (DCE); The COSEM client and the remote terminal device (DTE) of the COSEM server are each connected to an essential medium to perform communication protocol processing between the COSEM client and the COSEM server at a physical layer, a data link layer, and an application layer. Performing an interface by a communication protocol including a physical layer for the data layer, a data link layer for frame configuration, and an application layer for supporting packet transmission of the link layer; The COSEM client and the remote terminal device (DTE) of the COSEM server are each connected to an application layer of the communication protocol to perform an application process, an application layer of the communication protocol, an application layer, a data link layer, and a physical layer. An application including a management layer management process and a physical connection manager associated with a physical layer of the communication protocol; The remote terminal device (DTE) of the COSEM server, which is a center, measures and manages the electricity meter of the COSEM client that is the consumer side remotely by using the unified communication protocol, but the data having similar characteristics among the data required for the electricity meter. Electric meter remote reading and management system, characterized in that connected to each object managed by each other. The method according to claim 1, Each object is provided with an identification code for the data including the measurement value required for the remote metering device of the COSEM client, the abstract value used for setting, and the information on the operation of the meter. . The method according to claim 1, The communication protocol is a meter reading and management system, characterized in that the transmission of data acquired by the electronic meter is applied irrespective of the transmission medium. The method according to claim 1, wherein in the communication protocol, The physical layer applies only the optical interface of IEC 62056-21 for field connection and the standard interface between remote terminal device (DTE) and remote centralized device (DCE) defined in IEC 62056-42 for remote connection. Perform connection processing of essential media by allowing access only to HDLC using Mode E among the protocols defined in IEC 62056-21; The data link layer applies the standard of IEC 62056-46 for both remote and field access, and the Logical Link Control (LLC) sublayer and Medium Access Control to ensure that it is the data link layer for both connection-oriented and disconnected modes. (MAC) subdivided into layers to perform processing for frame construction; The application layer applies a standard of IEC 62056-53, the meter meter remote meter reading and management system, characterized in that for supporting the packet transmission of the data link layer.

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