KR100622084B1 - Realtime middleware with liking function for das - Google Patents

Abstract

The present invention relates to the load sharing of the main unit using the real-time middleware module having a linkage processing function applicable to the distribution automation system and the connection of other systems, the main unit connected to the real-time middleware module to perform the power system monitoring control function In a distribution automation system having a power supply system, the system is constructed between the main unit and the other power automation systems in order to minimize the system performance for the power system supervisory control, which is a function of the distribution automation system, by the request for connection with other power automation systems. With the copy of the real-time middleware module of the main unit, only the changed part can be transmitted to ensure the consistency of data, and the data can be provided by preventing the external linkage system from directly connecting to the main unit and connecting only to the linkage middleware module. There The lock.

DAS, Distribution Automation System, SCADA, Real-Time Middleware

Description

Real-time middleware module with linking function in distribution automation system {Realtime Middleware with Liking Function for DAS}

1 is a facility diagram of the central control apparatus of the distribution automation system according to the present invention

2 is a block diagram of a distribution automation system consisting of a middleware module having a load sharing function according to the present invention

3 is an internal process configuration diagram of a middleware module having a load sharing function according to the present invention

4 is an integrated system configuration using a middleware module having a load sharing function according to the invention

5 is a block diagram showing a process of processing changed data when the data is changed

6 is a configuration diagram showing a driving process of a linkage middleware module

Explanation of symbols for the main parts of the drawings

31. Real Time Server 32. History Server

33. Real-time middleware module 34. Middleware module for linkage

35. Shear processor 36. DAS HMI

37. Gateway for linkage 38. External automation system

39. Substation RTU

The present invention relates to a distribution automation system, and in particular, to extend the function of the real-time middleware module, which is an intermediate medium of all applications, real-time having a linkage function in a distribution automation system to standardize a method of exchanging and processing information between systems. It relates to the middleware module.

Recently, as industrial facilities have become larger and more computerized, more stable power supply has emerged, and demand for high-quality power supply of constant voltage and constant frequency is increasing. In particular, the distribution system consists of dendritic lines from substations to consumers. If a failure occurs due to various reasons such as tree grounding, vehicle collision, or wind gust, the entire power distribution line will be interrupted.

In order to prevent the enormous social loss, a system that remotely monitors sensors and remote switches that can be operated remotely in the distribution line and remotely monitors and operates them in a central control room by a computer is distributed on automation system (Distributive on Automation System). ; DAS).

When a failure occurs in a specific part, the distribution automation system judges the exact failure section by integrating and analyzing various information acquired remotely, separates the failure section by remote switch operation, and transmits the remaining power section again. Driving by.

The method of constructing the distribution automation system claims can be divided into a centralized software structure and a fully distributed system.

First of all, the centralized system is simple in structure, but it is difficult to add or expand programs, and it is necessary to construct new distribution lines due to the development of specific areas due to the characteristics of distribution lines. There is a problem.

The distributed object system uses the real-time middleware and configures the system so that only the FEP needed for the field equipment expansion needs to be added and the software can be easily deleted. Real-time middleware, unlike general DB transaction processing middleware, is a special-purpose middleware that focuses on real-time database, packet forwarding, alarm, and event processing.

Due to the characteristics of the power system divided into power generation / transmission / distribution, the distribution automation system has a lot of data requirements of other systems due to the characteristics of distribution directly connected to the power consumer. As data demands become an information society, the number of linked systems increases, and various types and types of data are required for each system.

In particular, as the number of linked systems increases and the amount of data increases, the load on the main unit increases, which inevitably affects the performance of the monitoring and control function of distribution automation.

Distribution automation system consists of distribution automation system for each region. That is, the area is monitored under the responsibility of the relevant distribution automation system. However, as the system evolves, attempts to install an integrated command room and an integrated distribution automation system and install several distribution automation systems under the control of manpower reduction and large-scale failure are being considered. The distribution automation system monitors the distribution system of its own area, and the integrated distribution automation system integrates, manages and commands the data acquired from the distribution automation systems.

In other words, the control authority for the field equipment exists only in each area in the distribution automation system, and the integrated distribution automation system has the authority to control the entire system.

However, in this case, due to the characteristics of the distribution system, the schematic diagram changes frequently, but if it is transmitted in the form of a file, inconsistency between the integrated command room and the subordinate command room may occur. Difficult to satisfy

The present invention is to solve the problems of the prior art distribution automation system, and all applications in the distribution automation system to standardize the method of exchanging and processing information between various systems by expanding and developing the functions of the real-time middleware module which is an intermediate medium. The purpose is to provide a real-time middleware module having a linkage function in the distribution automation system that allows.

In addition, the real-time middleware module with the linkage function in the distribution automation system that can be expanded in a consistent manner, such as to operate without changing the previous application software when configuring other systems and integrated systems. The purpose is to provide.

Real-time middleware module having a linkage function in the distribution automation system according to the present invention for achieving the above object is a distribution automation system having a claim that is connected based on the real-time middleware module to perform a power system monitoring control function, A copy of the real-time middleware module of the main unit built between the main unit and the other power automation systems to minimize the system performance for power system supervisory control, which is a function of the distribution automation system, by the demand for linkage with the power automation system. By transmitting only the changed part to ensure the consistency of the data, it is characterized in that the data is provided to be connected to only the middleware module for linking in the state that the external linkage system is blocked from being directly connected to the main device.

Here, when providing data at the request of the external linkage systems, the external linkage systems directly request the linkage middleware module in the form of international standard XML to acquire data without defining the linkage method and data format of the external linkage systems separately. It is characterized by.

And the real-time middleware module having a linking function, characterized in that each has a real-time middleware module and has an extension function for integrated management of a plurality of power distribution automation systems operating independently.

In addition, the real-time middleware module having a linkage function includes built-in drawing data such as a schematic diagram so that the embedded schematic data can be used immediately when external linkage systems are connected.

And the real-time middleware module having a linking function is characterized in that it is built in a linking gateway configured between the network to which the main device is connected and the network to which the external linking systems are connected.

The present invention is to provide a real-time middleware module for linkage having a load sharing function for configuring a distribution automation system has the following features.

First, the load sharing function can minimize the influence on the original function of the main system called power system supervisory control when the connection demand of other automation systems becomes frequent.

Second, by accepting international standard XML format for middleware's external access service, various other automation systems can select the data they want to receive in real time.

Third, when expanding the linkage middleware function to integrate and operate the distribution automation system distributed to each business site, each business site only refers to its own data, and the integrated command room has a flexible structure that allows the entire data of the subordinate offices to be managed. Have

Fourth, by placing the schematic diagram on the middleware, not the file, file exchange is unnecessary and each client program can obtain the latest schematic diagram only by accessing the middleware. It locates the data file on the middleware server and automatically analyzes the system file when the server is running and stores it in the physical memory which is the middleware data store. If the files to be stored are located in the middleware server as well as the system files, the middleware interprets the chunks of the files in parts and delivers the file chunks when the client requests a part of the file. The delivery process is via RPC calls.

In addition, it is possible to remotely modify and delete the file data located in the middleware in the same way as the file, and when the middleware exits, the file located in the memory is stored in the physical file again.

As described above, the present invention is to secure flexible scalability at the time of load sharing of the main unit and linkage of other systems by using real-time middleware having a linkage processing function applicable to a distribution automation system.

Hereinafter, a preferred embodiment of a power distribution automation system having a linkage middleware module according to the present invention will be described in detail.

Features and advantages of the power distribution automation system having a linkage middleware module according to the present invention will become apparent from the detailed description of each embodiment below.

1 is an installation diagram of a central control apparatus of a distribution automation system according to the present invention, Figure 2 is a configuration diagram of a distribution automation system consisting of a middleware module having a load sharing function according to the present invention.

More specifically, the present invention relates to a distribution automation system having a structure that facilitates easy interface between subsystems, expansion of a system, and addition of programs by all applications communicating through a middleware module that is an intermediate medium.

Here, as shown in Figure 1, the front end processor (FEP) for transmitting the information measured in the field to the main processing device, and the real-time server, history server, and the state of the field device for storing the data transmitted by the shear processor It includes a DAS HMI that can be represented by the user in graphical form.

Here, the external automation systems, SCADA (Supervisory Control And Data Acquisition) system for acquiring far-field monitoring control data, call center system for outage information guidance, new distribution information system (NDIS) to receive real-time system information of distribution automation In addition, it includes a web server that provides real-time system information to the operating room.

In addition, the system to which the present invention is to be applied is a gateway for linkage and an accessory, and the middleware module applied to the linkage gateway keeps a kind of copy while communicating with the main device middleware module.

Therefore, the influence of the main unit is minimized even when the number of external systems and the data demand increase.

In addition, firewalls are installed at both ends of the linking gateway to allow only the linkage between middleware modules and not allow other systems to be directly connected to the main processing device. Only the part changed by the middleware module is transmitted to the main processing device.

And if you want to acquire the data of distribution automation system through the linkage middleware module, you need to manage the requirements of various systems separately by requesting the linkage middleware by setting the type and format of the required data in the form of international standard XML. Disappear.

And the data of each point having a real-time middleware module, respectively, integrated management by the linkage middleware module.

The distribution automation system according to the present invention has a middleware module that independently connects to hardware along a network to support different communication protocols, system architectures, operating systems, databases and various application services as shown in FIG. 2.

Here, the connection by the middleware module means a logical connection in the application, not a physical connection between the client and the server.

The central control device of the distribution automation system according to the present invention is a distribution automation system for controlling the whole of the distribution automation system in order to monitor the status of the distribution line in real time and to quickly identify the fault section and recover quickly as shown in FIG. Linkage Server (Realtime Server) (Historical Server) is connected on the network, and the gateway server for linkage for data exchange with SCADA, the substation monitoring system, NDIS, the facility management system by GIS, and automatically according to the schedule. Front End Processor (FEP), which monitors the condition of field equipment and collects data, and Human Machine Interface (HMI), which provides the status of the site graphically at the command center.

The configuration in the case where the linkage middleware module for load sharing is applied to the distribution automation system is as shown in FIG. 2.

All applications communicate through the middleware module, which is an intermediate medium. Conceptually, the Plug & Play function enables the application to be executed when the applications are connected for communication.

First, in the distribution automation system, information measured in the field is transmitted to the main processing unit through a front end processor (FEP) 35, which is polled, exception report, and report by exception. The communication method is performed periodically, and the received information is stored in the real time server 31 and the history server 32 through the real time middleware module 33. In addition, the state of the field device is represented graphically to the user through the DAS HMI 36 to determine the state of the field system.

Its configuration consists of a real-time middleware module 33 which is constructed to prevent the power system monitoring control function from being affected by the linkage of the SCADA system and the linkage with other systems, and transmits information measured in the field to the main processing unit. A front end processor (FEP) 35, a real time server 31 and a history server 32 for receiving and storing data transmitted by the front end processor 35 through the real time middleware module 33; DAS Human Machine Interface (HMI) 36 for graphically expressing the status of field devices for users to grasp, SCADA Web for acquiring remote surveillance control data, call center for service reception processing, new distribution information system New Distribution Information System (NDIS) and the like include and are configured with external automation systems 38 to which they are connected.

As such, the FA (Feder Automation) network, which is connected to the real-time server 31, the history server 32, the front end processor (FEP) 35, and the DAS Human Machine Interface (HMI) 36, that is, distribution automation A middleware module 34 for linkage between the DAS network and the OA (Office Automation) network to which the external automation systems 38 are connected to share the load applied to the applications of the DAS network. It is composed.

The linkage middleware module 34 is built in the linkage gateway 37. The linkage gateway 37 is responsible for DAS security from the outside when the DAS network and other systems are connected, and delivers DAS information to the outside. An XML-based interworking middleware module 34 is constructed to enable web-based interoperability with a device that does the same.

The substation RTU 39 is connected to applications of the DAS network and the OA network through the linkage gateway 37.

A firewall is constructed between the linkage gateway 37 and the DAS network, and a firewall is established between the linkage gateway 37 and the OA network to which external automation systems are connected.

The linkage middleware tracks the location of the master middleware within the DAS network at start time. If the location of the real-time middleware is known, the linkage middleware stores its location by the real-time middleware. The real-time middleware then copies all of its data to the middleware for the initial data. This is done through an RPC call to a remote linkage middleware, and there is no limit to the number of linkage middlewares.

At this time, the two sides store each other's location in memory, and after the middleware is driven, the linking middleware periodically monitors whether there is an abnormality of the real-time middleware server. If real-time middleware is off, data exchange is not possible. When the real-time middleware is restarted after off, the real-time middleware re-copy the data to the linking middleware again.

As such, when the distribution automation system is constructed, it is easy to add or delete programs necessary for operating the system, and all programs need only manage their own internal memory, thereby enabling independent operation of each operating system.

Such an internal process and integrated system configuration of the linkage middleware module according to the present invention are as follows.

3 is an internal process diagram of a middleware having a load sharing function according to the present invention, and FIG. 4 is a configuration diagram of an integrated system using a middleware module having a load sharing function according to the present invention.

5 is a diagram illustrating a process of processing changed data when data is changed, and FIG. 6 is a diagram illustrating a driving process of a linkage middleware module.

In the distribution automation system according to the present invention, when a server service call is made through a middleware module from a client as shown in FIG. 3, the server service call signal is received through a network protocol, an operating system, and a middleware module at the server side to provide a corresponding result. do.

The result provided by the server side passes the result back to the client through the middleware module.

The power distribution automation system having the middleware module according to the present invention does not increase the capacity of the main processing device or introduce a new main processing device even if the field equipment is increased by the real-time middleware module 33, but the expansion that the middleware module has It is the structure which should just add a front end processor (FEP) 35 by a castle.

In addition, as the number of operators increases, the required DAS Human Machine Interface (HMI) 36 can be expanded in the same manner.

For previous systems, the number of front end processors (FEPs) 35 and DAS Human Machine Interfaces (HMIs) 36 is fixed so that the method can be used to increase the capacity of the main processing unit or to introduce a new main processing unit. There was no.

In order to share the load applied to the DAS network as described above, the linkage middleware module 34 is configured by the load sharing function including the linkage middleware module 34 in addition to the real time middleware module 33 to configure the real-time middleware module 33. Will have a copy of

If the data of the real-time middleware module 33 operating on the real-time network is changed, only this data is immediately reflected in the linking middleware module 34 to connect the external automation system 38 to the linkage of the middleware module 34. Operate with data.

And, as shown in Figure 5, the changed data is delivered in a PUSH model-based form to all the linking middleware connected inside the real-time middleware. The PUSH model is a form of copying and pushing data to the other side as needed.

Similarly, the data changed in the linkage middleware is also transmitted to the PUSH model only the portion changed to the real-time middleware, and the real-time middleware is transmitted to the data linking middleware connected to the plurality of linking middleware. This is done by calling RPC when notifying data change by storing each other's location when driving the linkage middleware.

In the case of the distribution automation system according to the present invention, in the case of the external automation system 38, the loads are all applied to the linkage middleware module 34 and become independent of the load of the system linked to the real-time middleware module 33 which is the original system. However, even if the demand of the external automation system 38 increases, only the load of the linkage middleware module 34 is affected. Therefore, the impact is minimized in the system of monitoring the original distribution system.

In general, for external linkage, a commercial Internet network is often used, which is an open network. However, the distribution automation system does not allow external access to the closed network. Therefore, the present invention allows only the interworking between middleware by inserting a firewall in the middle, and does not allow another system to be directly connected to the main system.

On the contrary, when external data is transmitted to the main system, for example, when data is transmitted from the substation RTU 39 to the main system, both middleware are independent by transmitting only the changed part of the middleware of the linkage gateway 37 to the main device part. It is operated by.

When data is acquired through the linkage middleware module 34, the data format is designated and taken in the international standard XML format. That is, the data needed by oneself can be defined and taken by oneself. In other words, the type of association is not determined by the system developer, but can be defined and acquired by the person who needs this data.

As shown in Fig. 4, the concept of 'integrated command room' to be introduced in the present invention into the distribution automation system is a concept to integrate three to four distribution automation systems before and operate in one place.

For example, the above-described distribution automation system is already operated at A and B points, and the C point is to be operated as an integrated command room.

In the distribution automation system at point A, it is possible to control all the field equipment at point A together with the data at point A. The same is true for point B. However, points A and B cannot acquire or control each other's data. In the case of the integrated point C, it should be possible to acquire and control all the data of A and B.

In the present invention, in order to solve this problem, the function of the linkage middleware module is extended, and the point A will have the A data in the corresponding real-time middleware module, and the point B will operate the B point data by inserting it into the corresponding real-time middleware module. By communicating with both middleware modules, the middleware module at point C can have both A + B areas.

In other words, if the middleware module has a middle or middle copy module in the form of A or B copy at point C, but the data is changed as the A or B system is changed, only the changed data is changed in the middleware module, and the data of the middleware module at point C Also change the entire system to ensure data consistency.

In addition, in the case of having the extensibility by the linkage middleware module as in the present invention, as shown in the following, the network data, which has a file form at each point, is accepted by the middleware module and connected to the middleware module as well as the real-time data. It can also be brought and operated right away.

Such characteristics of the middleware module applied to the distribution automation system according to the present invention are as follows.

The middleware module according to the present invention is an object-oriented middleware module for coordinating and simplifying connection and interaction of network applications.

In other words, as a distributed middleware module, it can automate basic tasks such as connection and memory management Marshal ring / back marshaling, connection endpoints and multiple requests.

The functions provided by the middleware module applied to the distribution automation system according to the present invention are summarized as follows.

First, clients register an event for use in an application to provide secure event sending and receiving services.

Second, the user can exchange packet information directly, so that the sender who sends the packet through the packet communication provides a packet service that can send the necessary command to the receiver receiving the packet.

Third, it provides data service that clients can process data without specific information about actual data location.

Fourth, clients can store log data through the log service provided rather than adding a separate log module to the application.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Such a real-time middleware module having a linkage function in the distribution automation system according to the present invention has the following effects.

First, by applying the middleware module for linkage to the distribution automation system, it is possible to provide data without degrading the performance of the basic function of the distribution automation system that originally processes various systems requiring linkage.

Second, it is possible to transmit data through middleware API by defining various frame types according to data format and describing XML-type requirements without developing a program and transmitting them to middleware module. Facilitates the connection of various systems

Third, by expanding the function of the linkage middleware, it is easy to configure the integrated distribution automation system that supports the integrated operation between distribution automation systems, and does not require any additional modification of the software.

Fourth, by embedding drawings such as the schematic diagram in the middleware, the system can receive the latest schematic data by accessing only the middleware that was previously distributed in the form of a file so that stable system operation is possible without the version management in the integrated distribution automation system. .

With this effect, the distribution automation system having the middleware module according to the present invention can be linked with other systems.

Therefore, since the standardization of the distribution automation system is not made, the system system is different for each company, and the problem of reworking according to the application target is applied to apply the distribution automation system.

Claims (5)

In the distribution automation system having a claim that is connected based on the real-time middleware module to perform the power system monitoring control function, It is established between the main unit and the other power automation systems to minimize the system performance for the power system supervisory control, which is a function of the distribution automation system, by the demand for linkage with other power automation systems. In the distribution automation system, having a copy of the real-time middleware module of the main unit, ensuring the consistency of data by transmitting only the changed part, and providing the data while preventing the external linkage system from directly connecting to the main unit. Real-time middleware module with linkage. The method of claim 1, wherein, in providing data at the request of external linkage systems, Real-time with the linkage function in the distribution automation system, characterized in that the external linkage systems directly request the linkage middleware module in the form of international standard XML to acquire data without separately defining the linkage method and data format of the external linkage systems. Middleware module. The method according to claim 1 or 2, wherein the real-time middleware module having a linking function, Real-time middleware module having a linkage function in a distribution automation system, characterized in that each of the real-time middleware module has an extended function to integrate and manage multiple distribution automation systems independently operated. The method according to claim 1 or 2, wherein the real-time middleware module having a linking function, Real-time middleware module with the linkage function in the distribution automation system, characterized in that the built-in schematic data, such as a schematic diagram, so that the embedded schematic data can be used immediately when external linkage systems are connected. The method according to claim 1 or 2, wherein the real-time middleware module having a linking function, A real-time middleware module having a linkage function in a distribution automation system, characterized in that it is built in a linkage gateway configured between a network to which a main device is connected and a network to which external linkage systems are connected.

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