CN1538292A

CN1538292A - Application management method of CSM-RTDB based on ombedded type system

Info

Publication number: CN1538292A
Application number: CNA200310101616XA
Authority: CN
Inventors: 峰高; 高峰; 杨常府; 孟凯锋; 吴涤
Original assignee: SIFANG JIBAO AUTOMATION CO Ltd BEIJING
Current assignee: Beijing Sifang Automation Co Ltd; Beijing Sifang Engineering Co Ltd
Priority date: 2003-10-22
Filing date: 2003-10-22
Publication date: 2004-10-20
Anticipated expiration: 2023-10-22
Also published as: CN1266594C

Abstract

The software platform of real time database includes abstract model of information based on objects of a variety of message bodies in transformer stations and function library of application programming interface (API) providing application software for periphery devices. Application management method of using embedded system possesses low requirement on interfaces of hardware and software, and high real time performance, reliability and availability, applicable to process of protection information in automation of transformer stations conveniently.

Description

Application management method based on transformer station's information access real-time database of embedded system

Technical field

The present invention relates to the protection information processing technology in the automation of transformation substations, especially special, relate to a kind of application management method of the transformer station's information access real-time database software platform (CSM-RTDB) based on embedded system.

Background technology

Software platform design based on embedded system is applied to the complex control system in the electric substation automation system.By building the real-time data base software platform that does not rely on any protective device communication protocol; both can be used as the protection equipment protocol conversion device of monitoring system of electric substation; can be used as the protection equipment management device of electric grid relay protection and failure message disposal system substation in the transformer station again, with the collection that realizes each relay protection device manufacturer protective device information, on send and teletransmission.

At present common soft, the hardware platform that are used for access protection facility information in the transformer station mainly contain:

1, framework is on Microsoft Windows operating system platform; run on industrial control computer or PC; the Object oriented programming instrument and corresponding programmed environment (VC, VB, Delphi) Kai Fa the protection information access software that adopt Microsoft or other company to provide.The advantage of such product is to run on mainstream operation system, and exploitation and configuration, debugging acid function can be done very powerfully.But shortcoming be resource requirement for hardware platform than higher, comprise arithmetic speed, memory size of CPU etc.; In addition, interference free performance and reliability requirement to various communication facilitiess in the transformer station are very high, and its cost of the computing machine that can meet the demands is higher.

2,, use compilation/C language to finish software design based on the hardware platform of single chip computer architecture.Such product, its advantage is a dependable performance, and low for the resource requirement of hardware platform, cost can be controlled at reduced levels.But shortcoming is that the exploitation and the later maintenance workload of hardware platform is big, software debugging underaction, convenience.

Summary of the invention

In order to overcome the above-mentioned problems in the prior art, the invention provides a kind of application management method of the transformer station's information access real-time database software platform (CSM-RTDB) based on embedded system, this CSM-RTDB comprises based on the information abstract model of the information resource database of various imformosome objects in the transformer station and for the application software of periphery provides application programming interfaces (API) function library, adopt the embedded real-time multi-task operating system QNX of micro-kernel to do when minimizing installation, need take the storage space of less than 2,000,000, be no more than 3,000,000 after adding networking component, can be installed in fully on DOC (Disk On Chip) or the DOM (Disk On Module).The CPU (dominant frequency is 133MHz) of employing 486 and 32,000,000 internal memory just can reach transformer station's field control and the real-time requirement of communicating by letter fully.This shows that what the product that carries out software development and other type based on QNX compared hardware requires much lowerly, can be applied to Embedded hardware platform.

In order to realize the unified management of the real time data of all relay protection devices, intelligent electronic device in the transformer station, need in the embedded hardware system, build a software platform, realize upgrading in time of data, and necessary application interface function.Hardware carrier may be general industrial computer, also might be Embedded computing machine, and is less demanding for the interface of software, but real-time, the reliabilty and availability of data had high requirements.

Because the Data Source complexity in the transformer station, data type is various, communication protocol differs, so information that is necessary in order to hold, the while guaranteed efficiency, must set up a real-time data base that form is more common in internal memory, being peripheral applications simultaneously sets up API necessary and complete function (Application Programming Interface--application programming interfaces) interface to the visit of real time data.

Description of drawings

Fig. 1 has shown the modular structure synoptic diagram of database software platform.

Fig. 2 has shown the overall flow figure that software of the present invention is realized.

Embodiment

Information for compatible devices from different manufacturers, consider the development trend of up-to-date international standard simultaneously, transformer station's information access real-time database software platform of embedded system (being called for short CSM-RTDB) is a source with " the general structure of application data " described among the IEC60870-5-3, for abstract model has been set up in the storage of remote signalling, remote measurement and electricity.This abstract model has also been described some other essential information of domestic transformer station, comprises protection incident, warning information, protection setting valve and disturbance record or the like.This model is irrelevant fully with outside physical interface, transmission medium, communication protocol, in addition with the station in any equipment all without any relation, put it briefly, this modeling process is " towards the imformosome object " fully.

Another important feature of CSM-RTDB is that it is that each interior imformosome object of database has been set up two index, and one of them index is called as " control is called the roll ", represents in the character string mode.This naming method makes the application-specific of database periphery, can explain the system information of transmitting on the CSC2000 electric substation automation system internal network in the simplest a kind of mode.The another one index is a simple integer, the use of integer index, make that the read-write of any one data object becomes very efficient, simple in any one database, peripheral applications can use this index to navigate to relative information bodies, the operation that then reads or writes rapidly in database.This mode has been removed common database retrieval character string matching method commonly used from, especially is adapted to Embedded hardware environment.

CSM-RTDB has used the mode of shared drive in order to make different application process shared data base resource, and the mode of this process communication and other interprocess communication modes have fast clear superiority by comparison.CSM-RTDB also uses the mechanism of shared drive simultaneously, has set up the formation that exchanges messages with application process.

◆ content is described and corresponding function

The information abstract model

The information abstract model mainly comprises following data structure:

1) time stamp is described, refreshed to remote measurement: ID, control roll-call, engineering value, quality

2) time stamp is described, refreshed to remote signalling: ID, control roll-call, value, displacement sign, quality

3) time stamp is described, refreshed to distant arteries and veins: ID, control roll-call, pulsed quantity, quality

4) ID of SOE:ID, corresponding remote signalling, control roll-call, value, time

5) incident and alarm: ID, coding, value, time stamp

6) remote control: ID, control roll-call, character, timing, order source, whereabouts, result

7) definite value: similar with remote control, the order square tube is often only called certain cover definite value of certain protective device when considering the definite value operation, is that object forms the definite value table with the protective device.

8) a control point real physical namelist: all control points be all to should there being Chinese physical name, but as title is existed in each model, then data structure takes up space very much, more influences search speed, so all titles are set up corresponding tables separately, supplies and uses program search.

The information abstract model is the information source of all application, and its content is the complete or collected works of transformer station's information.In order to adapt to the needs of various application, avoid modification to greatest extent to database and application program, abstract Information Model has following functional characteristics:

1) allow to revise or increase new application and need not to revise real-time data base;

2) increase, delete, revise data recording or change record order arbitrarily and need not to revise application program;

3) interface of application program and real-time data base is simple, unified, can be fast, correctly during the application queries data;

4) form of real time data library information is not limited to various concrete networks and message format, does not revise because of the variation of upper layer application form;

5) call the roll or its index by control during the application queries database, rather than directly use the more specific location information of data, avoid making real-time data base carry out update all owing to the increase of data recording.

CSM-RTDB application management process

The structure of CSM-RTDB realizes that by application management process dbms other application program is by calling operation and the visit of api function realization to real-time data base.Dbms finishes two main tasks: one is to utilize abstract Information Model to set up real-time data base, and another then is to handle real-time information, as: protection actuating signal, calling definite value, straighforward operation etc.

Open interface function storehouse

CSM-RTDB provides simple and clear application programming interfaces (API) function library for the application software of periphery and has deposited among the krnl.lib, and other application program can be called each api function in this document.These API comprise:

BOOL ConnectRTDB(USHORT)；

---connect real-time data base

vold DisConnectRTDB(void)；

---disconnection is connected with real-time data base

short GetIndexByName(BYTE*，USHORT)；

---obtain Numerical Index according to the control roll-call

BOOL GetNameByIndex(BYTE*，USHORT，USHORT)；

---obtain control according to Numerical Index and call the roll

USHORT GetYxLibSize(void)；

---obtain remote signalling storehouse size

USHORT GetYcLibSize(void)；

---obtain remote measurement storehouse size

USHORT GetYmLibSize(void)；

---obtain electricity storehouse size

BYTE GetYxByIndex(const?USHORT)；

---obtain the remote signalling value according to Numerical Index

short GetBinYcByIndex(const?USHORT)；

---obtain the remote measurement value according to Numerical Index, with binary representation

float GetFloatYcByIndex(const?USHORT)；

---obtain the remote measurement value according to Numerical Index, represent with floating number

UINT GetYmByIndex(const?USHORT)；

---obtain the electric degree value according to Numerical Index

void SetYxByIndex(const?USHORT，const?BYTE)；

---according to the remote signalling value in the Numerical Index rewriting storehouse

void SetYmByIndex(const?USHORT，const?UINT)；

---according to the distant arteries and veins value in the Numerical Index rewriting storehouse

void SetBinYcByIndex(const?USHORT，const?short)；

---according to the scale-of-two remote measurement value in the Numerical Index rewriting storehouse

void SetFloatYcByIndex(const?USHORT，const?float)；

---according to the floating number remote measurement value in the Numerical Index rewriting storehouse

BOOL PostMsg(MSG*)；

---in formation, give out information

BOOL PeekMsg(MSG*)；

---from formation, obtain message

BOOL GetRouteInfo(ROUTEINFO*)；

---obtain the route of information transmission

BOOL GetRouteInfoEx(ROUTEINFOEX*，BYTE)；

---obtain the route of information transmission

UINT GetYxAgeByIndex(const?USHORT)；

---obtain the historical information of remote signalling value according to Numerical Index

UINT GetBinYcAgeByIndex(const?USHORT)；

---obtain the historical information of remote measurement value according to Numerical Index

UINT GetYmAgeByIndex(const?USHORT)；

---obtain the historical information of electric degree value according to Numerical Index

Fig. 1 is the modular structure synoptic diagram of database software platform.Using A/B is the peripheral applications program, and the database maintenance process is the application management process dbms of CSM-RTDB, and real-time data base is the shared drive data field of setting up according to the information abstract model.

In Fig. 1, the contact between each module is as follows:

L01-uses the connection of A to real-time data base.The interface function that provides by CSM-RTDB is provided for each can be to the real-time data base process operation, obtains or the content of new database more.

L02-database maintenance process is connected with real-time data base.The database maintenance process is the foundation and the guardian of real-time data base.

L03-uses the connection of A to the database maintenance process.Two unidirectional message formations of database maintenance processes maintain and each application, a request and an order that is used for receiving application, another is used for a remote signalling displacement, remote control information priority such as return to school and is notified to this application.

L04-uses the connection of B to the database maintenance process.Same L03 is described.

L05-uses the connection of B to real-time data base.Same L01 is described.

The administration module implementation method of CSM-RTDB may be summarized to be following steps:

1. whole data structure and program are carried out initialization.Start necessary system timer, finish abnormality processing.The function that needs are provided is configured simultaneously, and reads necessary information from configuration file and be placed on the memory field.

2. create the shared drive district of the client process information that service need be provided, the relevant information that is used for preserving client process.

3. set up the shared drive district of real-time data base according to the configuring condition in the 1st step.This shared drive district is an object modeling with the imformosome, and sets up index, quick to realize, efficient, simple data access.

4. the service of entering after the work of 3 steps is finished in front provides program.This step is exactly the various services that circular test CSM-RTDB need provide.The order of short of termination service then entered for the 5th～7 step successively.When stopping the order of service, directly jumped to for the 9th step.

As client process after CSM-RTDB registration, CSM-RTDB enters accreditation process, promptly the information of client process is added the customer information resource storehouse, CSM-RTDB just can provide service for this process like this.

6. ask certain service as client process to CSM-RTDB, as: notify other process to have a protection actuating signal to produce, CSM-RTDB then accepts this services request, and transmits this message to other client.

As client process after CSM-RTDB nullifies, CSM-RTDB deletes the information of this client process from the customer information resource storehouse, finish the service that this client process is provided.

8. returned for the 4th step.

9. site clearing, the various resources that CSM-RTDB is set up discharge.Finish.

Fig. 2 has shown the overall flow figure that software is realized.As shown in Figure 2, the functional interpretation of each module is as follows among the figure:

S01-program initialization part.Consider that embedded system provides limited hardware resource, CSM-RTDB starts all service functions, but select specific service by the user according to user's needs, for example: import the functional conditions that service need be provided by the user by command line mode.In initialization section, CSM-RTDB has started necessary system timer, assists to finish the abnormality processing to service.

S02-creates the process shared resource.CSM-RTDB provides service for client process, therefore must preserve the relevant information of client process.This part is set up corresponding client process shared resource exactly.

S03-creates the imformosome resource.What CSM-RTDB built is the real-time data base platform that can realize that transformer station's information inserts, therefore needs to set up the information resource database based on various imformosome objects in the transformer station.

S04-judges whether current CSM-RTDB service stops.If do not stop, then enter normal service and patrol and examine (first step is to S05); Otherwise carry out S11 (withdrawing from processing).

S05-judges currently whether have client process to start the back to apply for the registration of to CSM-RTDB.If have client process to register then carry out S06, otherwise carry out S07.

S06-loads client process information.Its initial conditions is S05 (having client process to register).The content that this step realizes is the initiate client process of registration in CSM-RTDB, and preserves its relevant information, enters S07 after task is finished.

S07-judges currently whether have client process to transmit message to other process, and the various services that provide just are provided, and comprising: the read/write of transformer station's remote measurement, remote signalling, distant arteries and veins data, the operation of protective device definite value, straighforward operation, failure wave-recording, protection action etc.If the message that needs forwarding is arranged, then enter S08, otherwise carry out S09.

S08-transmits client's message.Its initial conditions is S07 (having message to need to transmit).The request that the client that CSM-RTDB handles service request proposes is handled, and transmits to other client according to request.After finishing, this step enters S09.

S09-judges currently whether have client process to withdraw from, and nullifies client process information from CSM-RTDB.If there is client process to nullify, then carries out S10, otherwise come back to S04.

The S10-client process is nullified.Its initial conditions is S09 (request that has client process to nullify).The task that this step realizes is the client process information deletion that will nullify from CSM-RTDB, and this shows that CSM-RTDB can no longer provide any service for the client process of nullifying.After finishing, this step comes back to S04.

S11-withdraws from the processing section.When CSM-RTDB withdraws from, must carry out the work of site clearing, finish all services, the various system resources that take are discharged.

CSM-RTDB is the real-time data base software platform that aims at the electric substation automation system design, can not limit its range of application in principle, can in the SAS of various producers, various structures (Substation AutomationSystem), obtain to use to greatest extent.Only need be according to the environment of practical application, write outside application code, the api function that uses database to provide, system data is write among the CSM-RTDB, then as required, use api function, in due course data are read from CSM-RTDB, by specific channel, the nodes that have communication capacity for other of SAS system use.

Claims

1. application management method based on transformer station's information access real-time database software platform (CSM-RTDB) of embedded system comprises:

A) whole data structure and program are carried out initialization;

B) establishment need provide the shared drive district of the client process information of service, the relevant information that is used for preserving client process;

C) set up the shared drive district of real-time data base according to the configuring condition in a step;

D) service of entering after the work of 3 steps is finished in front provides program;

E) as client process after CSM-RTDB registration, CSM-RTDB enters accreditation process, promptly the information of client process is added the customer information resource storehouse, thereby CSM-RTDB provides service for this process;

F) ask certain service as client process to CSM-RTDB, CSM-RTDB then accepts this services request, and transmits this message to other client;

G) as client process after CSM-RTDB nullifies, CSM-RTDB deletes the information of this client process from the customer information resource storehouse, finish the service that this client process is provided;

H) returned for the 4th step;

I) site clearing, the various resources that CSM-RTDB is set up discharge, and finish.

2. method as claimed in claim 1, wherein step a) further comprises: start necessary system timer, finish abnormality processing; The function that needs are provided is configured simultaneously, and reads necessary information from configuration file and be placed on the memory field.

3. method as claimed in claim 1, wherein the shared drive district described in the step c) is that object is set up the information abstract model with the imformosome, and sets up index, so that realize data access.

4. method as claimed in claim 1, wherein step d) further comprises: the various services that circular test CSM-RTDB need provide, the order of short of termination service then enters the e～g step successively, when stopping the order of service, directly jumps to the i step.

5. method as claimed in claim 3, wherein said information abstract model is based on the information resource database of various imformosome objects in the transformer station, comprises following data structure:

5) incident and alarm: ID, coding, value, time stamp

8) control point real physical namelist.

6. method as claimed in claim 1, wherein CSM-RTDB provides application programming interfaces (API) function library for the application software of periphery.