CN111046543A - Intelligent substation test simulation method - Google Patents
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Abstract
The invention discloses an intelligent substation test simulation method which comprises the steps of constructing a current intelligent substation system by modifying a configuration file, rapidly checking the correctness and integrity of modified contents by using a visual comparison tool of the configuration file, and judging the influence range of the modified contents of an SCD file on a normal operation interval. The intelligent substation test simulation method provided by the invention improves the production efficiency of debugging, operation and maintenance of the secondary system of the intelligent substation, improves the understanding and cognition of relay protection personnel on the intelligent substation, changes the current situation that only part of high engineers and experts with high professional technology and communication technology levels can be used for debugging in the construction of the existing intelligent substation, and enables more common relay protection personnel to debug the intelligent substation like a conventional substation. The intelligent substation fault processing efficiency is effectively improved, the operation and maintenance cost is reduced, and powerful guarantee and technical support are provided for secondary operation and maintenance and debugging.
Description
Technical Field
The invention belongs to the technical field of substation testing and function verification in a power grid, relates to an intelligent substation testing simulation technology, and particularly relates to an intelligent substation testing simulation method.
Background
The intelligent transformer substation adopts advanced, reliable, integrated and environment-friendly intelligent equipment, takes total station information digitization, communication platform networking and information sharing standardization as basic requirements, automatically completes basic functions of information acquisition, measurement, control, protection, metering, detection and the like, and simultaneously has advanced functions of supporting real-time automatic control, intelligent adjustment, on-line analysis decision, cooperative interaction and the like of a power grid.
The intelligent transformer substation mainly comprises an intelligent high-voltage device and a transformer substation unified information platform. The intelligent high-voltage equipment mainly comprises an intelligent transformer, intelligent high-voltage switch equipment, an electronic transformer and the like. The intelligent transformer is connected with the control system by means of communication optical fibers, and the state parameters and the operation data of the transformer can be mastered in time. When the operation mode is changed, the equipment determines whether to adjust the tap according to the voltage and power conditions of the system; when equipment goes wrong, early warning can be sent out, state parameters can be provided, and the like, so that the operation management cost is reduced to a certain extent, hidden dangers are reduced, and the operation reliability of the transformer is improved. The intelligent high-voltage switch equipment is high-performance switch equipment and control equipment, is provided with electronic equipment, a sensor and an actuator, and has monitoring and diagnosis functions. The electronic mutual inductor is a pure optical fiber mutual inductor, a magneto-optical glass mutual inductor and the like, and can effectively overcome the defects of the traditional electromagnetic mutual inductor. The transformer substation unified information platform has two functions, namely, system transverse information sharing which is mainly expressed as unification of various upper-layer applications in a management system on information acquisition; and secondly, the standardization of longitudinal information of the system is mainly expressed by the transparentization of each layer to the upper application support of the layer.
The intelligent substation is different from a conventional substation in that the secondary system highly depends on a Substation Configuration Description (SCD) file, the whole secondary system is contained in the SCD file, and a conventional integrated automation system intelligent electronic device is developed into a virtual circuit corresponding relation based on a general object-oriented substation event data packet based on a secondary connection relation of terminals.
The transformer substation is one of important systems of a power grid, and various devices and systems such as primary equipment, secondary equipment, control equipment and communication equipment are involved, and all the devices and systems can involve core problems such as safety and stability of power grid operation. With the investment of intelligent substations and the advance of the upgrading process, a plurality of unpredictable problems can occur, and if the intelligent substations are put into use in a real power grid without sufficient demonstration tests, serious and even irreversible results can be brought to the power grid.
Disclosure of Invention
The intelligent substation test simulation method is provided for solving the problems that the intelligent substation equipment upgrading and operation and maintenance process is complex and verification and test are difficult in the prior art.
According to one aspect of the invention, an intelligent substation test simulation method is provided, and is characterized in that the method is based on an intelligent substation test simulation system based on SCD, and the test simulation system comprises a GOOSE graphic simulation module, a total MMS simulation module and an SCD graphic analysis comparison module;
the GOOSE image simulation module is constructed based on an SCD mode and used for carrying out simulation configuration on different intelligent devices.
According to one aspect of the invention, the test simulation method comprises the steps of constructing the current intelligent substation system by modifying the configuration file, rapidly checking the correctness and integrity of the modified content by using a visual comparison tool of the configuration file, and judging the influence range of the modified content of the SCD file on the normal operation interval.
According to one aspect of the invention, the test simulation method includes a sample value reporting procedure that includes one or more of an organized and time-controlled manner.
According to one aspect of the invention, the information exchanged by the test simulation method is based on a publish/subscriber mechanism, and a publisher writes values into a sending buffer at the sending side; reading values from the local buffer at the receiving side; adding a time stamp to the value, the subscriber can check whether the value is refreshed in time; the communication system is responsible for refreshing the local buffer of the subscriber, and the sampled value control of the publisher is used to control the communication process.
According to one aspect of the invention, the test simulation method includes a method of exchanging samples between a publisher and one or more subscribers, the method of exchanging samples employing a multicast application association control block MSVCB.
According to one aspect of the invention, the test simulation method comprises a method for exchanging sample values between a publisher and one or more subscribers, said method for exchanging sample values using a two-sided application correlation, i.e. a one-way propagation sample value control block USVCB.
The intelligent substation testing simulation method provided by the invention is characterized in that a GOOSE graphical simulation module, a total station MMS simulation module and an SCD graphical analysis and comparison module are established based on SCD, an intelligent substation debugging expert system is established, debugging and analysis testing of MMS conventional functions of different manufacturers and different intelligent devices are realized, a multi-application mode portable debugging and analysis software system of the intelligent substation is developed, the production efficiency of secondary system debugging and operation and maintenance of the intelligent substation is improved, the understanding and understanding of relay protection personnel on the intelligent substation are improved, the current situation that only a part of high engineers and experts with high professional technology and communication technology levels can be used for debugging in the construction of the intelligent substation at present is changed, and more common relay protection personnel can debug the intelligent substation like the debugging of the conventional substation. The intelligent substation fault processing efficiency is effectively improved, the operation and maintenance cost is reduced, and powerful guarantee and technical support are provided for secondary operation and maintenance and debugging.
Drawings
Fig. 1 is a schematic diagram illustrating an interconnection relationship between primary equipment and secondary equipment according to an embodiment of the present invention;
FIG. 2 is a network framework diagram of the overall operation of the system according to an embodiment of the present invention;
FIG. 3 illustrates a sample value transmission model according to an embodiment of the present invention;
fig. 4 is a communication flow of MMS with acknowledgment service according to an embodiment of the present invention;
fig. 5 is a communication flow of MMS without acknowledgement service according to an embodiment of the present invention.
Detailed Description
The technical means adopted by the invention to achieve the predetermined object of the invention are further described below with reference to the drawings and the preferred embodiments of the invention.
As shown in fig. 1-5, in an optional embodiment of the present invention, an intelligent substation test simulation method is provided, where the method is based on an SCD-based intelligent substation test simulation system, where the test simulation system includes a GOOSE graphics simulation module, a total MMS simulation module, and an SCD graphics analysis and comparison module;
the GOOSE image simulation module is constructed based on an SCD mode and used for carrying out simulation configuration on different intelligent devices.
According to an aspect of an optional embodiment of the present invention, the test simulation method includes constructing a current intelligent substation system by modifying a configuration file, quickly performing correctness and integrity verification on modified contents by using a configuration file visualization comparison tool, and determining an influence range of the modified contents of the SCD file on a normal operation interval.
In accordance with an aspect of an alternative embodiment of the present invention, the test simulation method includes a sample value reporting process that includes one or more of an organized and time-controlled manner.
According to an aspect of an alternative embodiment of the invention, the information exchanged by the test simulation method is based on a publish/subscriber mechanism, and the publisher writes values into a send buffer on the sending side; reading values from the local buffer at the receiving side; adding a time stamp to the value, the subscriber can check whether the value is refreshed in time; the communication system is responsible for refreshing the local buffer of the subscriber, and the sampled value control of the publisher is used to control the communication process.
According to an aspect of an alternative embodiment of the invention, the test simulation method comprises a method of exchanging samples between a publisher and one or more subscribers, the method of exchanging samples using a multicast application association control block MSVCB.
According to an aspect of an alternative embodiment of the invention, the test simulation method comprises a method for exchanging samples between a publisher and one or more subscribers, said method for exchanging samples using a bilateral application association, i.e. a single-pass propagation sample control block USVCB.
An advanced comparison algorithm is utilized to develop an applicable configuration file visual comparison tool, so that operation and maintenance professionals can be helped to quickly check correctness and integrity of modified contents, and the influence range of the modified contents of the SCD file on normal operation intervals is judged. The project research SCD configuration file difference comparison technology and algorithm compares the characteristics of the existing different XML configuration file analysis methods, researches a rapid analysis technology suitable for large-capacity configuration files, researches the composition relation and difference of equipment configuration files of different manufacturers, provides SCD comparison specifications, and realizes the comparison of different historical period versions of the SCD of the intelligent substation.
The intelligent substation bay level message monitoring and intelligent warning technology comprises the following steps:
the monitoring technology of the common messages of the intelligent substation spacer layer is researched, the messages are captured in real time, the network messages are analyzed in detail and in real time, whether the messages are normal or not is analyzed, and the original data are provided for positioning specific faults according to intelligent alarm of the analyzed messages.
SV message
The transmission of sampled values requires special attention to time constraints. The model provides for reporting of sample values in an organized and time controlled manner, so that the sampling and transmission integrated jitter is minimized and the sampling, number and order are kept constant. The model is used to exchange the values of DATA-SET. DATA of DATA-SET is the common DATA class SAV (sample values defined at DL/T860.73) that defines the buffer storage structure to transfer DATA.
The information exchanged is based on a publish/subscriber mechanism. Writing the value into a sending buffer area at a sending side publisher; at the receiving side the subscriber reads the value from the local buffer. By timestamping the values, the subscriber can verify that the values are refreshed in time. The communication system is responsible for refreshing the local buffer of the subscriber. The publisher's Sample Value Control (SVC) is used to control the communication process.
There are two methods of exchanging sample values between a publisher and one or more subscribers. One method employs a MULTICAST-APPLICATION-ASSOCIATION (MULTICAST APPLICATION ASSOCIATION control block MSVCB). The other adopts TWO-PARTY-APPLICATION-ASSOCIATION (USVCB bilateral APPLICATION ASSOCIATION, namely a single-path propagation sampling value control block USVCB).
The input is sampled at a specified sampling rate. The synchronization of the sampling is realized internally or through the network, and the sampling is stored in the transmission buffer area.
The network embedded scheduler sends the contents of the buffer to the subscriber over the network. The sampling rate is a mapping specific parameter. The sampled values are stored in the subscriber's receive buffer. The application function is notified when a new set of sample values reaches the receive buffer.
The model should provide a mechanism by which the subscriber can detect loss of samples. If the samples cannot be transmitted due to problems of the communication network, the issuing party should be able to delete these samples.
GOOSE message
GOOSE information exchange uses a publish/subscribe mechanism, in which a party wishing to acquire data plays the role of a client and a party providing data plays the role of a server. The same physical device may be either a server or a client. The publish/subscribe service mechanism supports the device to actively transmit data to other devices. In the publish/subscribe mechanism, once data is generated, the data can be actively transmitted according to a subscription path determined in advance. And any external intervention is not needed, so that the communication is ensured to be rapid.
GOOSE supports the exchange of common DATA organized by DATA-SET, sending GOOSE messages each time one or more member value changes are referenced by DATA-SET. The extracted GOOSE message format specifies the information contained in the GOOSE message.
If one or more data in the data set of the issuing party changes the attribute value of the object, the buffer area of the sending party of the memory card is refreshed by the issuing service of the issuing party, the changed data value is written into the local buffer area of the sending side, the values are transmitted by GOOSE messages, and the messages are exchanged by adopting a multicast technology. The subscriber reads the data value from the local buffer on the receiving side. The communication service mapping of the communication network will refresh the contents of the subscriber buffer and inform the application of the received data. The GOOSE-like gotb of the issuing party is used to control the whole process.
And constructing a transplantable intelligent substation debugging expert system, which mainly comprises GOOSE graphical simulation, total-station MMS simulation and SCD graphical analysis. Five modules of MMS client, message monitoring, GOOSE issuing, SCL comparison and MMS model checking are realized.
The model management function provides management of SCL models and simulation data for the simulation system. The method comprises the steps of firstly importing an SCD model of the whole station, providing an operation interface for a user to select simulated IEDs, and then checking the model and the validity of the configuration of the model to ensure that the LED simulation function is not influenced by the problem of the model. On the basis, the signals in the model are extracted to form an application signal library, and the functions of editing and managing the simulation signals are provided.
The MMS application simulation function can simulate the communication behavior and the response logic of the IED serving as an IEC 61850/MMS server and is used for debugging the communication function of IEC61850 client systems (such as a monitoring background, a protection substation and a telecontrol network shutdown) of a station control layer. The simulation system can simulate the IED to be in communication connection with the client systems, and provides application simulation functions such as signal simulation, closed-loop control simulation, fixed-value simulation, fault recording simulation and the like on the basis.
Signal simulation includes remote signaling simulation, remote sensing simulation, event simulation, and the like. The remote signaling simulation can simulate the process of IED remote signaling deflection and uploading, thereby replacing the traditional method of using direct current to click a device signal terminal to test the state quantity. The remote sensing simulation can simulate the process of uploading the remote sensing change of the IED after the remote sensing change exceeds a set threshold value, and can replace the traditional method of generating a simulation signal by a tester to test an analog quantity. The event simulation can simulate various alarm events, protection action events and the like of the IED, so that point-to-point experiments with a client system are facilitated.
The closed-loop control simulation function simulates the response and processing process of the IED when controllable objects such as a remote control switch, a disconnecting link, a pressing plate and the like are controlled, and comprises the processes of receiving a remote control command of a client system, judging whether the switch position is effective or not during remote control selection, triggering remote signaling uploading after the remote control execution is successful and the like, so that the remote control operation debugging of the client system is facilitated.
The fixed value simulation function can simulate operations of local fixed value modification, local activity fixed value area switching and the like of the protection device IED, and meanwhile, the simulation device receives commands of remote fixed value modification, remote fixed value area switching, remote calling of the fixed value and the like and responds to the commands, so that the fixed value function debugging of the protection IED by the client system is facilitated.
The fault recording simulation function can simulate the process of generating a fault recording file by the protection device IED and then informing the client system of calling the recording file, and comprises the processes of automatically generating the fault recording file, the fault occurrence time and the fault sequence number, sending a fault notification to the client system, receiving a calling recording request of the client system and responding, transmitting the recording file to the client system through file service and the like. The function is typically applied to debugging the protection substation to debug the recording file transfer function of the IEC61850 client system and the protection IED.
The GOOSE simulation function can simulate the communication behavior of the IED as a GOOSE message publisher/receiver, and is used for GOOSE signal point-to-point debugging among 2 IEDs having a GOOSE transceiving relationship, and the specific functions include GOOSE signal transmission, GOOSE signal receiving monitoring, signal logic driving and the like. And triggering GOOSE signal deflection and sending by manual counting or automatic counting based on the data set signal related to the GOOSE sending control block in the model. The GOOSE receiving function acquires GOOSE signals related to the simulation IED by monitoring GOOSE network messages, so as to monitor signals received by GOOSE in real time. In simulation, the GOOSE signal supports common application data types such as single-point signal, double-point signal, floating point data, shaping data, and bit string data. The signal logic driving function is used for simulating an association triggering mechanism between GOOSE input and GOOSE output inside the IED, and can participate in logic rule operation on related signals, and the logic operation result can be used for driving GOOSE signal transmission.
In accordance with an aspect of an alternative embodiment of the present invention, the system platform hardware configuration scheme is as follows:
the practical debugging and analyzing system for the multi-application-mode intelligent substation developed by the project is a practical debugging and analyzing platform for the intelligent substation integrating software and hardware. The network framework diagram of the overall operation of the system is shown in fig. 2.
The hardware platform of the system mainly comprises a data acquisition unit and a data management unit.
(1) Data acquisition unit
1. And SV and GOOSE data of a process layer are acquired, SV and GOOSE message information is captured in real time, massive information is uploaded to a management analysis unit, and abnormal information is stored in a database.
2. And the statistical record of the process layer network messages has complete original message analysis and statistical functions, SV and GOOSE messages are classified and screened according to a preset control block, and abnormal information data are classified and counted. And the switch management function is used for carrying out MMS or SNMP protocol communication with the switch to acquire the real-time information of the switch, so that the state of the process layer network is further analyzed.
(2) Data management unit
1. And analyzing the SCD file, generating a message interaction logic based on the APPID, downloading the message interaction logic to the switch, obtaining a message interaction routing table from the switch, and generating a virtual secondary loop diagram and a network topology diagram. And when the set abnormal condition is met, classified intelligent alarm is carried out, and original data is provided for positioning specific fault equipment.
2. And (5) visualizing a secondary system. The connection states of the secondary equipment maintenance and the virtual circuit are visually displayed in a visual graphic mode, and the graphically displayed circuit covers various functional circuits of relay protection.
3. And intelligently analyzing and diagnosing the secondary system. The secondary system intelligent diagnosis comprises the functions of monitoring, early warning and fault positioning. When the relay protection acts and the secondary equipment has faults or is abnormal, intelligent diagnosis and analysis are carried out according to the expert system, and fault location of secondary device hardware and a secondary circuit is achieved.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. An intelligent substation test simulation method is characterized in that the method is based on an intelligent substation test simulation system based on SCD, and the test simulation system comprises a GOOSE graphic simulation module, a total-station MMS simulation module and an SCD graphic analysis comparison module;
the GOOSE image simulation module is constructed based on an SCD mode and used for carrying out simulation configuration on different intelligent devices.
2. The intelligent substation test simulation method according to claim 1, wherein the test simulation method comprises the steps of constructing a current intelligent substation system by modifying the configuration file, rapidly checking correctness and integrity of modified contents by using a visual comparison tool of the configuration file, and judging an influence range of the modified contents of the SCD file on a normal operation interval.
3. An intelligent substation test simulation method according to claim 1 or 2, characterized in that the test simulation method comprises a sample value reporting procedure comprising one or more of an organized and time controlled manner.
4. An intelligent substation test simulation method according to any one of claims 1-3, characterized in that the information exchanged by the test simulation method is based on a publish/subscriber mechanism, and the publisher writes the value into the send buffer on the sending side; reading values from the local buffer at the receiving side; adding a time stamp to the value, the subscriber can check whether the value is refreshed in time; the communication system is responsible for refreshing the local buffer of the subscriber, and the sampled value control of the publisher is used to control the communication process.
5. The intelligent substation test simulation method of claim 4, wherein the test simulation method comprises a method for exchanging sampling values between a publisher and one or more subscribers, wherein the method for exchanging sampling values adopts a multicast application association control block (MSVCB).
6. The intelligent substation test simulation method according to claim 4 or 5, wherein the test simulation method comprises a method for exchanging sample values between a publisher and one or more subscribers, wherein the method for exchanging sample values adopts a bilateral application association (one-way propagation sample value control block USVCB).
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Cited By (4)
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| CN111555448A (en) * | 2020-05-09 | 2020-08-18 | 国网山东省电力公司菏泽供电公司 | Intelligent substation remote monitoring and simulation drilling system |
| CN112711829A (en) * | 2020-11-15 | 2021-04-27 | 国网新疆电力有限公司阿克苏供电公司 | Intelligent substation secondary equipment batch production intelligent maintenance system |
| CN112865309A (en) * | 2021-01-13 | 2021-05-28 | 湖南依中紫光电气科技有限公司 | Intelligent substation analysis method and system with automatic modeling function |
| CN115225660A (en) * | 2022-05-20 | 2022-10-21 | 上海电气国轩新能源科技有限公司 | Method, system, device and medium for processing communication data in energy storage system |
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| CN111555448A (en) * | 2020-05-09 | 2020-08-18 | 国网山东省电力公司菏泽供电公司 | Intelligent substation remote monitoring and simulation drilling system |
| CN112711829A (en) * | 2020-11-15 | 2021-04-27 | 国网新疆电力有限公司阿克苏供电公司 | Intelligent substation secondary equipment batch production intelligent maintenance system |
| CN112865309A (en) * | 2021-01-13 | 2021-05-28 | 湖南依中紫光电气科技有限公司 | Intelligent substation analysis method and system with automatic modeling function |
| CN112865309B (en) * | 2021-01-13 | 2022-08-02 | 湖南依中紫光电气科技有限公司 | Intelligent substation analysis method and system with automatic modeling function |
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