CN102035260B - Intelligent warning and fault analysis realizing method for intelligent transformer substation monitoring system - Google Patents

Abstract

The invention is an intelligent alarm and fault analysis implementation method applied to an intelligent substation monitoring system, which belongs to the technical field of substation automation. The intelligent alarm and fault analysis module is responsible for analyzing various information sent by measurement and control devices, protection devices, and fault recording devices. , combined with topology technology and automatic identification of each type of fault in the fault reasoning model, a fault analysis report is generated and sent to the dispatching master station at the master station side. Greatly reduce the workload of the staff on duty and improve the efficiency of troubleshooting. It can meet the requirements of intelligent substations for intelligent alarm and fault analysis system, quickly determine and analyze faults, and provide a treatment plan to assist the on-duty personnel to quickly deal with faults and reduce losses caused by faults.

Description

Implementation method of intelligent alarm and fault analysis of intelligent substation monitoring system

technical field

The invention belongs to the technical field of substation automation, and in particular relates to a method for realizing intelligent alarm and fault analysis of a substation automation system.

Background technique

At present, the State Grid Corporation of China is vigorously promoting the construction of smart grids. Various advanced sensing and measurement technologies, communication technologies, computer information technologies, and control technologies are highly integrated with the physical grid. The technical difficulty of running jobs continues to increase, and the efficiency of running jobs needs to be further improved. In the current operation of substations, traditional manual work still occupies a large proportion. With the promotion of digital substations, there are more and more signals in substations. However, operating experience shows that during substation accidents and serious abnormalities, the output Most of the large amounts of information are auxiliary and supporting information or redundant information. When a fault occurs, various signal actions are frequent, and the duty officer has a heavy monitoring task, so it is easy to miss important alarm signals, delaying processing and causing accidents. . Therefore, it is very necessary to summarize the common fault types and fault criteria of substations. When a fault occurs, the computer software can automatically deduce the fault, so that the operator can quickly obtain the fault analysis results: including fault equipment, trip switches, protection action information , fault phase difference, fault current, fault distance, fault nature, handling measures, etc., which are of great significance for improving the speed, efficiency, and quality of accident handling.

Contents of the invention

The purpose of the present invention is to provide a method for implementing intelligent alarm and fault analysis of the substation automation system, which can be used as an advanced application module of the intelligent substation monitoring system to quickly determine and analyze faults, give a fault analysis report and send it to the dispatching system , to provide a solution to the on-duty personnel, assist them to quickly deal with the fault, and reduce the loss caused by the fault.

The present invention adopts following technical scheme:

The method for realizing intelligent alarm and failure analysis of an intelligent substation monitoring system is characterized in that it includes the following steps:

This method is embedded in the smart substation monitoring system in the form of a software module, and the required information such as alarm information, telemetry value, equipment status, protection information, and fault recording files are obtained from the integrated information platform of the smart substation, which can effectively ensure timely access to various A fault criterion.

(1) Each fault type in the substation corresponds to one or more fault start signals. When the inference engine software receives the start signal, it starts the corresponding fault type reasoning logic;

(2) Analyze the topological connection of substation equipment, and obtain the operating status of the equipment to which the current start signal belongs according to the electrification of the equipment, such as which switches are currently running on the busbar, the switches connected to the line, and the switches on each side of the main transformer switch, etc.;

(3) Analyze and process the remote signaling, telemetry, protection information, switch position status, etc. within a period of time before and after the start signal occurs, and check whether the reasoning logic is satisfied by referring to the associated equipment obtained in step (2);

(4) If the reasoning logic of the fault type in step (3) is met, wait for the wave recording HDR file sent by the wave recording device, and obtain information such as fault phase difference, fault current, and fault distance;

(5) Take the fault handling plan corresponding to the fault type from the knowledge base, combine the information in step (4) to generate a fault analysis report and save it to the history database;

(6) The fault report is sent to the dispatcher in the IEC104 extended message format through the telecontrol system, and the fault analysis report is stored in the local history library for users to read and print.

For common faults in substations, it is very important for operators to master the causes and treatment methods of each fault, but it is also complicated and often needs to consult the plan. In view of the fact that the design of substations is becoming more and more standardized, and the network structure and equipment conditions of substations with the same voltage level are similar, this method summarizes a fault reasoning model for designing reasoning machine software, which covers common fault types and their criteria in substations , supported fault types are: line single-phase transient fault, line single-phase permanent fault, line phase-to-phase and three-phase fault, line receiving long jump signal tripping, line manual closing fault, line reclosing time conversion fault, line reclosing time External conversion fault, line single-phase fault fault phase failure, line phase-to-phase fault switch fault phase failure, single-phase permanent fault switch non-fault phase failure, bus fault, bus fault fault phase failure, bus fault non-fault phase failure, main transformer fault, Main transformer fault switch fault phase failure, main transformer internal fault heavy gas action, capacitor fault, reactor fault, station transformer fault, DC disappearance fault, etc. Therefore, the reasoning machine software will automatically identify these faults and report the fault reasoning results on the fault reasoning page of the briefing window. The method summarizes the occurrence conditions of common fault types in substations, can automatically reason and report common faults in substations, does not require users to input complex logic, and has the characteristics of simple maintenance and strong versatility.

In order to distinguish different remote signaling used as fault criteria, this method sets a remote signaling type field in the remote signaling definition table in the intelligent substation monitoring system database to divide remote signaling into different types, which are used to identify the participating logic Reasonable remote signaling mainly includes line protection trip A, line protection trip B, line protection trip C, line protection action, bus differential action, failure action, reclosing, main transformer main protection action, main transformer backup protection action, main transformer Main body weight gas, switch protection action, capacitor protection action, reactor protection action, station substation protection action, three-phase inconsistency, protection long jump action, local discrimination device action, DC loss, switch position, switch A phase position, switch B phase position, switch C phase position, etc. The inference engine software finds useful signals from many remote signals received after a fault occurs to participate in fault judgment according to these types of remote signals.

To accurately judge a fault, it is necessary to intercept the signal of a time slice in the signal buffer received by the smart substation monitoring system as the reasoning basis, and only reason and judge the information and equipment status received in the time slice. This time slice is called is the "failure time window". The "failure time window" should span a period of time before and after receiving a certain type of fault start signal. If the "failure time window" is too short, it is easy to miss the reasoning conditions, resulting in missed judgment, but if it is too long, it is easy to cause misjudgment. The time window can be flexibly set by the user according to the actual situation of the substation, generally it can be set to 5-15 seconds, and can be flexibly adjusted according to the on-site time operation situation.

A concise and practical knowledge base structure has been formulated, including fault name, fault level, fault diagram, affiliated scheduling, fault cause, and treatment measures.

The knowledge base domain is set in the remote signaling definition table, and the knowledge base domain is used to index the records in the knowledge base table, and the user can call out the intelligent alarm window to display the content of the knowledge base according to the alarm information on the alarm window.

Topology analysis fully takes into account the various wiring modes and operating modes of existing substations. When the operating status changes, the fault judgment logic is also adjusted accordingly. Logical judgments are not involved.

The reasoning and judgment of a certain fault type will start only after receiving the start signal of a certain fault type. If the conditions are met, the reasoning result will be displayed on a separate reasoning result page in the warning window, and there will be eye-catching prompts and voice alarms, so that users Troubleshoot quickly.

When the fault report is generated, the information of the fault wave recording is combined, and the fault current, fault phase difference, fault distance measurement and other information can be displayed when the fault occurs.

The fault analysis report is transmitted to the main station through the telecontrol system, so that the dispatcher can obtain the detailed situation of the substation fault at the first time, replacing the traditional telephone report.

The beneficial effects achieved by the present invention: for the dispatching end, after a fault occurred in the past, it is necessary for the operator of the substation to sort out the useful information from the numerous information in the alarm window, and then combine the protection information and the comprehensive analysis of the fault recording file to sort out the fault It is time-consuming and labor-intensive to analyze the report and then report to the dispatcher. Benming can automatically generate a fault analysis report and send it to the dispatcher after a fault occurs, greatly reducing the workload of the on-duty personnel and improving the efficiency of fault handling. For unattended substations, this function is very necessary.

Description of drawings

Fig. 1 is a network structure diagram of the present invention;

Figure 2 is a typical wiring diagram of 500kV;

Fig. 3 is a flow chart of the program of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

As shown in FIG. 1, it is a network structure diagram of the present invention. The substation end includes intelligent substation monitoring system, measurement and control device, protection device, fault recording device and other parts. As an advanced application module of the intelligent substation monitoring system, the intelligent alarm and fault analysis module is responsible for analyzing the measurement and control device, protection device, and fault recording device. All kinds of information sent up, combined with topology technology and automatic identification of each type of fault in the fault reasoning model, generate a fault analysis report and send it to the dispatching master station at the master station side.

As shown in Figure 2, take the 500kV typical wiring diagram as an example, in conjunction with the program realization flow chart of the present invention in Figure 3, take the fault "500kV line-A phase transient fault, successful reclosing" as an example to illustrate the reasoning and analysis process of the present invention.

The inference machine keeps checking the type of the received signal. When a signal of the type "line protection trip A" is detected, a timer will be started immediately to wait for the end of the fault time window to ensure that the fault should be received. After all the signals are received, the fault type inference module of "line A phase transient fault, successful reclosing" is started immediately. The line is generally equipped with two sets of line protection, and the A signal of the line protection of any set of protection will start the fault type reasoning module. The fault type inference module will perform topology analysis, and obtain the circuit breaker connected to it according to the line to which the start signal belongs. Depending on the wiring mode and operating status, there may be one or two circuit breakers. Corresponding to this example, the circuit breaker should be obtained 5011 and circuit breaker 5012, and then the inference engine judges whether the circuit breaker 5011 and circuit breaker 5012 have A phase opening and A Phase closing, whether there are reclosing signals of circuit breaker 5011 and circuit breaker 5012, if the above conditions are met, it will report "transient phase A fault of 500kV certain line A, successful reclosing" on the fault reasoning page of the alarm window. Then the inference engine waits for the upload of the fault recording file. After receiving the fault recording HDR file of the line protection, it will take out the fault current, fault phase difference, fault distance and other information from the fault, and then find it from the knowledge base. Corresponding to the knowledge base record of the fault, a fault analysis report of the fault is generated, stored in the historical database, and waited for the on-duty staff to read or print, and the fault analysis report will be sent to the dispatcher through the motion system.

The reasoning and judgment process of other fault types is similar to this example, but the specific judgment logic is different. For those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (9)

1. intelligent substation supervisory control system intelligent alarm and accident analysis implementation method may further comprise the steps:

(1) the corresponding one or more fault initiating signals of every kind of fault type of transformer station after inference machine software is received said fault initiating signal, start corresponding fault type inference logic;

(2) substation equipment is carried out topology and connect analysis,, obtain the running status of current said fault initiating signal corresponding device according to the charged situation of equipment;

Remote signalling before and after when (3) said fault initiating signal being taken place in a period of time, remote measurement, protection information are or/and the location status relevant information of switch is carried out analyzing and processing; With reference to the equipment that obtains in the step (2); Information and this equipment state to receiving in this time period are carried out reasoning and judging, and whether inspection satisfies said fault type inference logic;

(4) as satisfying the fault type inference logic in the step (3), wait for the record ripple HDR file that wave recording device is sent up, obtain therefrom that fault is separate, fault current is or/and the fault localization relevant information;

(5) from knowledge base, transfer the corresponding troubleshooting prediction scheme of this fault type, the information of integrating step (4) generates far and is saved in history library;

(6) with far through sending scheduling on the telecontrol system, deposit far in local history library simultaneously and supply the user to have access to and print.

2. intelligent substation supervisory control system intelligent alarm according to claim 1 and accident analysis implementation method is characterized by: this method comprises the occurrence condition of the most common failure type of transformer station, and automated reasoning is also reported the most common failure of transformer station.

3. according to claim 1 described intelligent substation supervisory control system intelligent alarm and accident analysis implementation method; It is characterized by: in the remote signalling definition list of this method in intelligent substation supervisory control system database the remote signalling type field is set; Remote signalling is divided into different types, is used to discern the remote signalling of participating in reasoning from logic.

4. intelligent substation supervisory control system intelligent alarm according to claim 3 and accident analysis implementation method; It is characterized by: the knowledge base territory is set in the remote signalling definition list; This knowledge base territory is used for the record of index knowledge base table, and the user accesses the content that the intelligent alarm window shows this knowledge base according to warning information on the alarm window.

5. intelligent substation supervisory control system intelligent alarm according to claim 1 and accident analysis implementation method; It is characterized by: the structure of said knowledge base comprises that fault title, fault level, fault diagram, affiliated scheduling, failure cause are or/and treatment measures.

6. intelligent substation supervisory control system intelligent alarm according to claim 1 and accident analysis implementation method is characterized by: topological analysis is according to the existing various modes of connection of transformer station and operational mode, corresponding adjustment fault judgement logic.

7. intelligent substation supervisory control system intelligent alarm according to claim 1 and accident analysis implementation method; It is characterized by: the signal of a timeslice of intercepting is as the reasoning foundation in the buffering area of the signal that said system is received; Set one fault time window; Only information and the equipment state received in this time window are carried out reasoning and judging, this timeslice is set according to transformer station's actual conditions by the user.

8. intelligent substation supervisory control system intelligent alarm according to claim 1 and accident analysis implementation method; It is characterized by: the reasoning and judging of fault type is started by the enabling signal of this fault type; The reasoning results is presented at an independent The reasoning results page of alarm window, and highlight indication and audio alert prompting user processing fault are arranged.

9. intelligent substation supervisory control system intelligent alarm according to claim 1 and accident analysis implementation method; It is characterized by: combine the information of failure wave-recording to generate far, show that fault current, the fault when fault takes place is separate or/and the fault localization relevant information.