WO2014090025A1

WO2014090025A1 - On-line and off-line integrated analysis and testing method for smart substation

Info

Publication number: WO2014090025A1
Application number: PCT/CN2013/084681
Authority: WO
Inventors: 沈冰; 周健; 庄黎明; 曾平; 周德生
Original assignee: 国网上海市电力公司; 华东电力试验研究院有限公司; 国家电网公司
Priority date: 2012-12-11
Filing date: 2013-09-30
Publication date: 2014-06-19
Also published as: CN103033703B; CN103033703A

Abstract

Provided is an on-line and off-line integrated analysis and testing method for a smart substation, which belongs to the field of tests and comprises an on-line real-time monitoring method and an off-line analysis method. An on-line monitoring part thereof effectively integrates a network communication analysis module, an SV real-time communication structure and message analysis logging module, a GOOSE real-time communication structure and message analysis logging module, an MMS real-time communication structure and message analysis logging module, and a 1588 clock synchronization module having the functions for calculating master/slave clock offset and correcting a slave-device clock in a network delay mode. Thus, a device-level and system-level testing capability for the smart substation is obtained, and the data obtained by means of the off-line analysis method is compared with the data obtained by means of the on-line real-time monitoring method, so as to further confirm whether various operating parameters of the smart substation are normal or not, thereby improving the accuracy of the overall data, and being applicable to the field of substation testing of smart power grids.

Description

An online and offline integrated intelligent substation analysis test method

The invention relates to an analysis and test method for a power system, in particular to an integrated platform for analyzing and testing the operation of an intelligent substation which can be used offline or online. Say

Background technique

With the development of modernization, the smart grid technology that is built with it is changing with each passing day. Among them, the development of smart grid technology is inseparable from the advanced dispatch center and the book intelligent substation. The advanced dispatch center is equivalent to the brain of the power grid. The intelligent substation is the eyes and hands and feet. To ensure real-time comprehensive information collection and reliable and accurate command execution; With the sub-station informationization, the degree of automation and the general improvement and gradual formation, the command function of the advanced dispatch center can be fully realized, and the execution capability can be improved; , self-healing, flexible and other characteristics, gradually developed into a smart grid.

With the construction of the advanced dispatch center, it will gradually have the ability and possibility to control complex large power grids. Numerous advanced control functions, including trend optimization, powerful online analysis, accident warning, emergency handling, and post-event recovery, all rely on the scientific and rapid decision-making of the advanced dispatch center. The decision of the advanced dispatch center needs to be timely, Full power grid information, and the intelligent substation will undertake all kinds of real-time and non-real-time information of the collection grid, and send it to the advanced dispatch center according to the transient, dynamic and static classification and transmission requirements. On the other hand, the execution and execution efficiency of the decision-making of the advanced dispatch center is also largely at the intelligent substation, and most of the final implementation of each control needs to be completed by the intelligent substation.

In summary, there is a need for an integrated technical verification that can cope with the situation of intelligent substation in the construction of substation automation laboratory and digital transformation, and can combine online analysis capability and off-line simulation capability with multiple adaptability and seamless connection. The platform, in order to verify and test smart devices, can also research and pilot the theory, information organization, high-profile interface of intelligent substation, and more importantly, in the process of intelligent substation technology evolution, you can rely on the platform. Conduct close tracking and focused breakthroughs. Summary of the invention

In order to solve the problems caused by the substation in the digital transformation and substation automation laboratory, and to achieve the high integration of existing resources and the direct cooperation of production, education and research, for the effective protection of intelligent substation, wisdom The power grid process, and can support and drive the development and maturity of smart grid technology for a long period of time, and effectively promote the intelligent process of the power grid in the process of improving the informationization and automation degree of the substation. An on-line and off-line integrated intelligent substation analysis test method is provided, which effectively improves the technical level of the power grid by effectively combining the offline simulation capability of the laboratory and the on-line analysis capability of the pilot interval, thereby achieving more reliable Safer and more economical operation, making the grid stronger and more flexible.

The technical solution of the present invention provides an online and offline integrated intelligent substation analysis and test method, including an online real-time monitoring method and an offline analysis method, wherein the online real-time monitoring method includes a network communication analysis module and an SV real-time. Communication structure and message analysis and recording module, GOOSE real-time communication structure and message analysis and recording module, MMS real-time communication structure and message analysis and recording module, and 1588 with computing master-slave clock offset and network delay correction slave device clock function Clock synchronization module;

The offline analysis method includes a communication record information module, a communication synchronization transmission module, and a synchronous transmission network module connected in a direct connection manner.

An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the network communication analysis module is divided into three parts: a substation layer, a spacer layer and a process layer -

(1) The process layer device implements all functions related to the primary device interface, and converts the AC sampling signal and the DC status signal into a digital signal in situ, which is a digital and intelligent interface of the primary device;

(2) The main function of the interval layer device is to collect the signals of the primary device and to trip and control the primary device, and send relevant information to the station control layer device and the command to accept the station control device;

(3) The function of the station control layer equipment is to use the total station information to monitor and control the primary equipment of the whole station and the communication with the remote control center.

An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the substation layer, the interval layer and the process layer, the three layers of devices realize data exchange and information sharing through network communication, The network between the process layer and the interval layer device is a process layer network, and the communication content is an AC sampling signal SV, a DC state signal GOOSE, and a hard time signal 1588, and the network between the interval layer device and the station control layer device is The station control layer network, its communication content is the total station protection information, the four remote data and all the information MMS that needs to be monitored, and the soft time signal SNTP.

The design purpose here is that the network structure of the intelligent substation is different from the network structure of the previous digital substation. The relay protection device realizes direct sampling and direct trip through point-to-point communication, which realizes the independence of the relay protection device and greatly improves the independence. Reliability and safety of relay protection devices. An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the SV communication structure and the message analysis and recording module have a flow in which an SV communication structure is mapped to an Ethernet physical layer and The data link layer transmits the packet analysis and recording module by means of the multicast transmission network, and then performs on-off analysis and packet continuity analysis on the SV packet to determine whether the SV packet meets the requirements of the SV application protocol. During the analysis, if it is determined that the SV packet does not meet the requirements of the SV application protocol, the SV packet is listed as an error packet, and the error type is identified and displayed. For the error packet, if the error affects subsequent processing, After the identification is performed, the next packet is directly processed. For the correct packet, the application is analyzed to determine whether there is an error in the application process of the single packet or the packet.

An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the manner of the multicast transmission network is divided into a network through a switching device and a point-to-point direct connection network -

(1) In the network transmission mode through the switching device, the merging unit and the device are connected to the network switching device, and all the information is transmitted on the common network, and the data flow direction is determined by the multicast address, the vlan information, and the APPID;

(2) In the point-to-point direct connection network transmission mode, each MU sampled value output interface is directly connected to the sampling value input interface of the relevant device through the optical fiber;

When the sampled value is sent in the above manner, all the merging units and devices are connected to the network switching device, and the merging unit sends the sampled value information to the network through the connected switching device, and the device obtains the sampled value information from the network through the switching device. And record the sample value integrity, sample point interval stability and sample transmission delay stability.

The purpose of the design here is that, in theory, in the case of normal transmission medium, the sampled value is transmitted through the network of the switching device. Since the network switching device is involved in the transmission of the sampled value, the point-to-point network transmission does not contain any intermediate links. Therefore, the results of these two transmission methods must be different.

For sampled value messages, the factors that affect the quality of the entire sampled value are as follows -

(1) Integrity, that is, the integrity of the sampling point, the sampling point is not lost during transmission, and the information is lost when the information is lost. Due to the characteristics of information transmission and the influence of network structure and network exchange, information loss is inevitable, so information loss and Its impact is an issue that must be considered. The focus of this research is on the loss of information and the impact of information loss on equipment operation;

(2) Discreteness refers to the interval stability of sampling points. Due to the influence of network structure and network switching, sampling interval will be inevitably affected. The research focus on this aspect is what kind of fluctuations will occur in the sampling interval and the impact of fluctuation on the operation of the equipment. Taking the 80-point sampling of the weekly wave as an example, 4000 sampling points per second are evenly distributed, and two adjacent points are The time difference between them is 250 microseconds; (3) Synchronization refers to the synchronization of the sampled value waveform between the analog voltages of different manufacturers, that is, the time error between the same sampling points, which is the stability of the transmission delay. Due to the influence of network structure and network switching, sampling delay and sampling delay fluctuation will inevitably occur. The research in this area focuses on the level of sampled transmission delay and what kind of fluctuations will occur, and the resulting delays and fluctuations will have an impact on the equipment;

(4) Consistency. Refers to the consistency of the waveform processing of the merging unit, that is, the consistency of the sampled value waveform of the merging unit input (transformer access signal) and the sampled value waveform of the output end.

Among the above factors, except that the consistency directly reflects the performance of the merging unit, the final characteristics of synchronization, dispersion and integrity are determined by network transmission. Therefore, the sampling value communication structure focuses on these three aspects. Conduct an inspection.

An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the GOOSE communication structure and the message analysis and recording module have a flow in which a GOOSE communication structure is mapped to an Ethernet physical layer and The data link layer transmits the message analysis and recording module through the multicast transmission network, and then performs on-off analysis and message continuity analysis on the GOOSE message to determine whether the GOOSE message meets the requirements of the GOOSE application protocol. During the analysis, if it is determined that the GOOSE message does not meet the requirements of the GOOSE application protocol, the GOOSE message is listed as an error message, and the error type is identified and displayed. For the error message, if the error affects subsequent processing, After the identification is performed, the next packet is directly processed. For the correct packet, the application is analyzed to determine whether there is an error in the application process of the single packet or the packet.

(1) In the transmission mode through the switching device network, each device is connected to the network switching device, and all the information is transmitted on the common network, and the data flow direction is determined by the multicast address, the vlan information, and the GOOSE control block name and the like;

(2) In the transmission mode of the point-to-point direct connection network, the GOOSE output interface of each device is directly connected to the GOOSE interface of the related device through the optical fiber;

When the sampled values are transmitted in the above manner, all devices are connected to the network switching device, and all devices obtain sampled value information from the network through the switching device, and record transmission stability and signal integrity integrity.

The purpose of the design here is that since the transmission of GOOSE is completely based on the network and the network switching device, the recording of GOOSE not only records the transmission process of recording GOOSE itself, but also records the record. The implementation status of the network environment in which the GOOSE transmission is located is recorded, so the recorded GOOSE information must also be obtained from the network switching device, and at the same time, the recording of GOOSE and its network environment is realized.

An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the MMS real-time communication structure and the message analysis and recording module have the following procedure -

(1) client MMS connection request;

(2) The server MMS connection answers, accepts or rejects, if it is accepted, continues;

(3) client MMS initialization request;

(4) The server MMS initializes the response to accept, reject or fail, and if it is accepted, continues;

(5) The application communication process based on the MMS request/response service and the unanswered service starts;

(6) Perform network layer analysis and communication process analysis on the MMS message obtained by the device MMS communication terminal or the background MMS communication terminal, and determine whether the MMS message meets the requirements of the MMS application protocol. First, perform network layer on the MMS message. Analyze, determine whether the information type is legal, and perform topology analysis to determine whether the TCP/IP address of the MMS packet is legal and the port number is legal. Secondly, analyze the communication process of the MMS packet, including continuity analysis and continuous message. Sexual analysis, in the process of analysis, whether in the process of network layer analysis or communication process analysis, if it is determined that the MMS message does not meet the requirements of the MMS application protocol, the MMS message is listed as an error. The message, identifying its type of error, and displaying it. For the error message, if the error affects the subsequent processing, the next message is processed directly after the identification is performed. For the correct message, the application is analyzed to determine whether there is an error in the application process of the single message or the message.

The purpose of the design here is that among the switches used in the actual project, the substation layer switches all have port mapping function, that is, all the data of one port is mapped to another port, and when the monitoring is performed, if the switch port of the background monitoring is connected Mapping to another port, and then connecting this port to the communication monitoring device, can successfully monitor the substation layer information.

An online and offline integrated intelligent substation analysis and test method according to the present invention is characterized in that: the communication record information module, the communication synchronization transmission module and the synchronous transmission network module of the offline analysis method, the specific steps are: communication The record information module obtains information from the communication record device or the test site in the system through the synchronous sending device, saves the content of the communication message and its time information in a file format to a specific area, and then extracts the message content from the file. And time information, comprehensive processing, and then sent to the target communication network and the device through the communication synchronous sending module, and the synchronous sending network module can synchronously send the communication module with the target network condition The target network is connected. When connecting, you need to first determine the destination and phase of each message. Information such as the sending port, and the respective sending ports of the communication synchronous sending module are connected with the corresponding network devices in the target network and the corresponding ports of the running device to reproduce the current network state.

The purpose of the design here is to compare the offline analysis method with the data obtained by the above-mentioned online real-time monitoring method to further confirm whether the operational parameters of the intelligent substation are normal, and improve the accuracy of the overall data.

In summary, the correctness and integrity of intelligent substation information not only directly affects the realization degree of substation intelligence, but also the operation status of intelligent substation depends entirely on the comprehensive processing of acquired information, so how to ensure timely, accurate, Completely obtain sufficient substation operation information, and quickly and comprehensively process the information, grasp and predict the operation status of the intelligent substation in real time, provide early warning to various abnormal conditions, and take timely measures to prevent the occurrence of faults, thus according to the actual situation of the substation. The continuous evaluation of the operation of the substation is an urgent need to ensure the construction and operation and maintenance of the intelligent substation.

The following beneficial effects are obtained by using the intelligent substation analysis test method of the present invention -

1. The online monitoring part of the technical solution of the present invention comprises a network communication analysis module, an SV real-time communication structure and a message analysis and recording module, a GOOSE real-time communication structure and a message analysis and recording module, an MMS real-time communication structure, and a message analysis and recording module, and The calculation of the master-slave clock offset and the network delay correction is effectively integrated from the 1588 clock synchronization module of the device clock function, enabling it to obtain intelligent substation device level and system level test capabilities;

2. The offline analysis method of the technical solution of the present invention is compared with the data obtained by the online real-time monitoring method described above, further confirming whether the operational parameters of the intelligent substation are normal, and improving the accuracy of the overall data. BRIEF abstract

FIG. 1 is a schematic diagram of an overall step of an online and offline integrated intelligent substation analysis test method according to the present invention.

2 is a schematic diagram of signal transmission of the SV real-time communication structure and the message analysis and recording module; FIG. 3 is a schematic diagram of the message recording process of the SV real-time communication structure and the message analysis and recording module; FIG. 4 is a GOOSE real-time communication structure and a message analysis record. Schematic diagram of signal transmission of module; Figure 5 is a schematic diagram of the message recording process of GOOSE real-time communication structure and message analysis and recording module; Figure 6 is a schematic diagram of signal transmission of MMS real-time communication structure and message analysis and recording module; Figure 7 is MMS real-time communication Schematic diagram of the message recording process of the structure and message analysis and recording module; 8 is a schematic diagram of a communication record information module of an off-line analysis method for an online and offline integrated intelligent substation analysis test method according to the present invention;

9 is a schematic diagram of a communication synchronization sending module of an offline analysis method;

FIG. 10 is a schematic diagram of a synchronous transmission network module of an offline analysis method. detailed description

The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

Example

As shown in FIG. 1 , an online and offline integrated intelligent substation analysis test method includes an online real-time monitoring method and an offline analysis method, and the online real-time monitoring method includes a network communication analysis module, an SV real-time communication structure, and a message analysis and recording module. , GOOSE real-time communication structure and message analysis and recording module, MMS real-time communication structure and message analysis and recording module and 1588 clock synchronization module with computing master-slave clock offset and network delay correction slave device clock function;

The offline analysis method includes a communication record information module, a communication synchronization transmission module, and a synchronous transmission network module that are connected in a direct connection manner.

The network communication analysis module is divided into three parts: substation layer, interval layer and process layer -

The substation layer, the interval layer and the process layer, the data exchange and information sharing are realized by the network communication between the three layers of devices, wherein the network between the process layer and the interval layer device is a process layer network, and the communication content is the AC sampling signal SV The DC status signal GOOSE and the hard time signal 1588, the network between the interval layer device and the station control layer device is a station control layer network, and the communication content is the whole station protection information, the four remote data and all the information MMS that needs to be monitored, Soft time signal SNTP.

The biggest difference between the network structure of the intelligent substation and the network structure of the previous digital substation is that the relay protection device realizes direct sampling and direct trip through point-to-point communication, which realizes the independence of the relay protection device and greatly improves the reliability of the relay protection device. Sex and safety.

Referring to FIG. 2 and FIG. 3, the SV communication structure and the message analysis and recording module are in the process of SV communication. The letter structure is mapped to the physical layer and the data link layer of the Ethernet, and the message analysis and recording module is transmitted through the multicast transmission network, and then the SV message is analyzed for continuity and analysis, and the continuity of the message is analyzed to determine the SV. Whether the packet meets the requirements of the SV application protocol. If the SV packet does not meet the requirements of the SV application protocol, the SV packet is listed as an error packet, and the error type is displayed and displayed. If the error affects the subsequent processing, the packet is processed and the next packet is processed. For the correct packet, the packet is applied for analysis to determine whether there is an error in the application process of the single packet or packet.

The SV communication structure and the packet analysis and recording module's multicast transmission network are divided into a switched device network and a point-to-point direct connection network:

Theoretically speaking, in the case of normal transmission medium, the sampled value is transmitted through the network of the switching device. Since the network switching device is involved in the transmission of the sampled value, the point-to-point network transmission does not contain any intermediate links, so the two transmission methods The results must be different.

(2) Discreteness refers to the interval stability of sampling points. Due to the influence of network structure and network switching, sampling interval will be inevitably affected. The research focus on this aspect is what kind of fluctuations will occur in the sampling interval and the impact of fluctuation on the operation of the equipment. Taking the 80-point sampling of the weekly wave as an example, 4000 sampling points per second are evenly distributed, and two adjacent points are The time difference between them is 250 microseconds;

(3) Synchronization refers to the synchronization of the sampled value waveform between the analog voltages of different manufacturers, that is, the time error between the same sampling points, which is the stability of the transmission delay. Due to network structure and The effects of network switching will inevitably result in sampling delays and sampling delay fluctuations. The research in this area focuses on the level of sampled transmission delay and what kind of fluctuations will occur, and the resulting delays and fluctuations will have an impact on the equipment;

Referring to FIG. 4 and FIG. 5, the GOOSE communication structure and the message analysis and recording module have a flow in which the GOOSE communication structure is mapped to the physical layer and the data link layer of the Ethernet, and the message is transmitted through the multicast transmission network. Analyze the recording module, and then perform on-off analysis and message continuity analysis on the GOOSE message to determine whether the GOOSE message meets the requirements of the GOOSE application protocol. In the analysis process, if it is determined that the GOOSE message does not meet the requirements of the GOOSE application protocol The GOOSE message is listed as an error message, and the error type is identified and displayed. For the error message, if the error affects the subsequent processing, the identifier is processed, and the next message is directly processed. For the correct message, Perform an application analysis on the packet to determine whether there is an error in the application process of a single packet or packet.

The GOOSE communication structure and the message analysis and recording module's multicast transmission network are divided into a switched device network and a point-to-point direct connection network:

The purpose of the design here is that since the transmission of GOOSE is completely based on the network and the network switching device, the recording of GOOSE not only records the transmission process of recording GOOSE itself, but also records the implementation status of the network environment in which the GOOSE transmission is recorded. Therefore, the recorded GOOSE information must also be obtained from the network switching device, and at the same time realize the recording of GOOSE and its network environment.

Referring to FIG. 6 and FIG. 7, the MMS real-time communication structure and the message analysis and recording module are as follows: Next:

(1) client MMS connection request;

(3) client MMS initialization request;

Among the switches used in the actual project, the substation layer switches all have port mapping function, which maps all the data of one port to another port. When monitoring, if the switch port connected to the background monitoring is mapped to another port. Then, the port is connected to the communication monitoring device, and the monitoring of the substation layer information can be successfully realized.

As shown in FIG. 8, FIG. 9, and FIG. 10, the communication record information module, the communication synchronization sending module, and the synchronous transmission network module of the offline analysis method, the specific steps are: the communication record information module is from the communication record device or the test site in the system. By synchronizing the information obtained by the transmitting device, the content of the communication message and its time information are saved in a file format to a specific area, and then the content and time information of the message are extracted from the file, and comprehensive processing is performed, and then synchronously transmitted through communication. The module is sent from the specified network interface to the target communication network and the device, and the synchronous transmission network module can connect the communication synchronization sending module with the target network when the target network condition is available, and needs to first determine the sent when connecting. In the information, the destination of each message and the corresponding sending port and other information, the respective sending ports of the communication synchronous sending module are connected with the corresponding network devices in the target network and the corresponding ports of the running device, and the current network state is reproduced. .

Compare the offline analysis method with the data obtained by the online real-time monitoring method described above, and further confirm It is recognized whether the operating parameters of the intelligent substation are normal, and the accuracy of the overall data is improved. The invention relates to an online and offline integrated intelligent substation analysis test method, and the online monitoring part comprises a network communication analysis module, an SV real-time communication structure and a message analysis and recording module, a GOOSE real-time communication structure and a message analysis and recording module, and an MMS real-time. The communication structure and the message analysis and recording module are effectively integrated with the 1588 clock synchronization module with the calculation of the master-slave clock offset and the network delay correction slave device clock function, which enables the intelligent substation device level and system level test capability, and The offline analysis method is compared with the data obtained by the online real-time monitoring method to further confirm whether the operational parameters of the intelligent substation are normal, and the accuracy of the overall data is improved, and is suitable for the substation detection field of the smart grid.

The above embodiments are only used to explain and explain the present invention, and are not intended to limit the technical solutions of the present invention; those skilled in the art should recognize that the above embodiments are within the spirit of the present invention. Variations and modifications will fall within the scope of protection claimed in the claims of the present invention. Industrial applicability

The online monitoring part of the technical solution adopts a network communication analysis module, an SV real-time communication structure and a message analysis and recording module, a GOOSE real-time communication structure and a message analysis and recording module, an MMS real-time communication structure, and a message analysis and recording module, and has The calculation of the master-slave clock offset and the network delay correction is effectively integrated from the 1588 clock synchronization module of the device clock function, enabling it to obtain intelligent substation device level and system level test capabilities;

The off-line analysis method of the technical solution is compared with the data obtained by the online real-time monitoring method described above, further confirming whether the operational parameters of the intelligent substation are normal, improving the accuracy of the overall data, and helping to solve the digital transformation and substation of the substation The problems arising from the automation of the laboratory, and the high integration of existing resources, can effectively guarantee the intelligent substation, smart grid process, and can support and drive the development and maturity of smart grid technology for a long period of time.

Claims

Claim

1. An online and offline integrated intelligent substation analysis test method, comprising an online real-time monitoring method and an offline analysis method, characterized in that: the online real-time monitoring method comprises a network communication analysis module, an SV real-time communication structure and a message An analysis recording module, a GOOSE real-time communication structure and a message analysis and recording module, an MMS real-time communication structure and a message analysis and recording module, and a 1588 clock synchronization module having a function of calculating a master-slave clock offset and a network delay correction slave device clock;

2. The online and offline integrated intelligent substation analysis and test method according to claim 1, wherein the network communication analysis module is divided into three parts: a substation layer, a spacer layer and a process layer.

3. The online and offline integrated intelligent substation analysis and test method according to claim 2, wherein the substation layer, the interval layer and the process layer, the three layers of devices implement data through network communication. Switching and information sharing, wherein the network between the process layer and the bay level device is a process layer network, and the communication content is an AC sampling signal SV, a DC state signal GOOSE, and a hard time signal 1588, a bay device and a station layer device. The network between the two is the station control layer network, and its communication content is the whole station protection information, the four remote data and all the information MMS that needs to be monitored, and the soft time signal SNTP.

4. The online and offline integrated intelligent substation analysis and test method according to claim 1, wherein the SV communication structure and the message analysis and recording module have a flow in which the SV communication structure is mapped to the Ethernet. The physical layer and the data link layer of the network transmit the packet analysis and recording module through the multicast transmission network, and then perform on-off analysis and packet continuity analysis on the SV packet to determine whether the SV packet conforms to the SV. The application protocol requires that, in the analysis process, if it is determined that the SV packet does not meet the requirements of the SV application protocol, the SV packet is listed as an error packet, and the error type is identified and displayed. For the error packet, if the error occurs. If the subsequent processing is affected, the next message is processed directly after the identification. The packet is analyzed and applied to determine whether there is an error in the application process of a single packet or packet.

5. The online and offline integrated intelligent substation analysis and test method according to claim 4, wherein the manner of the multicast transmission network is divided into a network through a switching device and a point-to-point direct connection network:

6 . The online and offline integrated intelligent substation analysis and test method according to claim 1 , wherein the GOOSE communication structure and the message analysis and recording module have a process in which a GOOSE communication structure is mapped to an ether. The physical layer and the data link layer of the network transmit the message analysis and recording module through the multicast transmission network, and then perform on-off analysis and message continuity analysis on the GOOSE message to determine whether the GOOSE message conforms to GOOSE. The application protocol requires that, in the analysis process, if it is determined that the GOOSE message does not meet the requirements of the GOOSE application protocol, the GOOSE message is listed as an error message, and the error type is identified and displayed. For the error message, if the error occurs. If the subsequent processing is affected, the next packet is processed directly. For the correct packet, the application is analyzed to determine whether there is an error in the application process of the single packet or packet.

7. The online and offline integrated intelligent substation analysis and test method according to claim 6, wherein the manner of the multicast transmission network is divided into a network through a switching device and a point-to-point direct connection network:

When the sampled value is sent as described above, all devices are connected to the network switching device, all devices The sampled value information is obtained from the network through the switching device, and the transmission stability and signal change integrity are recorded.

8. The online and offline integrated intelligent substation analysis and test method according to claim 1, wherein the MMS real-time communication structure and the message analysis and recording module have the following procedure -

(1) client MMS connection request;

(3) client MMS initialization request;

9. The online and offline integrated intelligent substation analysis and test method according to claim 1, wherein the offline recording method comprises: a communication record information module, a communication synchronization transmission module, and a synchronous transmission network module, The specific step is that the communication record information module obtains information from the communication record device or the test site in the system through the synchronous sending device, and saves the content of the communication message and its time information in a file format to a specific area, and then from the file. Extracting the message content and time information, performing comprehensive processing, and then transmitting the communication synchronization module to the target communication network and the device through the communication synchronization module, and the synchronous transmission network module may be provided when the target network condition is available. The communication synchronous sending module is connected to the target network. When connecting, it is necessary to first determine the information of the transmitted information, the destination of each type of message, and the corresponding sending port, and send the respective sending ports of the communication synchronous sending module to the target network. Network equipment and Row corresponding port connected apparatus, when reproducing the network status.