CN112260992A - Method for exchanging message data between power supply monitoring system and equipment operation and maintenance system - Google Patents
Method for exchanging message data between power supply monitoring system and equipment operation and maintenance system Download PDFInfo
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Abstract
The invention discloses a method for a power supply monitoring system to interact message data of an equipment operation and maintenance system, which is used for power supply monitoring and equipment operation and maintenance systems of urban rail transit. The invention transmits the power supply equipment communication message of the production control area to the equipment management area server through the cross isolation, provides access for operation and maintenance workshop team members by using a WEB browser, and can intensively and remotely check the equipment communication message and the state information of the production control area. The invention has the beneficial effects that: the urban rail transit power supply equipment is widely dispersed in geographical installation and deployment, compared with the existing on-site equipment communication message collection mode, the power supply equipment monitoring communication messages are collected in a large equipment management area in a centralized mode, the power supply equipment communication state diagnosis and operation and maintenance are carried out, and the working efficiency of rail transit power supply automation operation and maintenance personnel is greatly facilitated.
Description
Technical Field
The invention relates to the technical field of urban rail transit, in particular to a method for supporting remote centralized diagnosis and operation and maintenance of urban rail transit power supply system equipment by a basic technology, and provides a method for an urban rail transit power supply monitoring system to interact message data with an equipment operation and maintenance system.
Background
The access debugging of the urban rail transit power supply monitoring system to the channel of the equipment and the diagnosis of the message communication running condition are always very important operation and maintenance working links in the automatic construction and running processes of the power supply monitoring system. Debugging and diagnosing the operation condition of the equipment by checking the communication channel message of the equipment is a frequently used means in the operation and maintenance of the power supply operation and maintenance class of the urban rail company.
According to the safety network architecture, a power supply monitoring system is deployed in a production control large area (hereinafter referred to as a safety area one and an area one), an equipment operation and maintenance system is deployed in an equipment management large area (hereinafter referred to as a safety area three and an area three), and strong logic isolation is formed between the two. At present, when equipment channels are debugged and operated for patrol maintenance, operation and maintenance personnel cannot access an equipment network in one area, so that message contents of a home terminal and an opposite terminal are generally obtained in a manual mode of telephone inquiry, downloading copy and the like, and generally the operation and maintenance personnel need to enter an electric power monitoring system machine room and log on a server in a safe area for obtaining the message contents.
These approaches often have the following disadvantages:
first, it is difficult to obtain the message content. The device communication message is usually stored in a specified format in a specified path of the device, and the format and the position of the buffer message of different devices are different. When viewing, a special tool is needed to browse and read.
Secondly, the efficiency is not high. Telephone inquiry or manual downloading requires cooperation of specially-assigned persons, and the processing period is long. Especially when inquiring messages of opposite terminals, if no person is matched with the opposite terminals, the work can not be continued.
Thirdly, the security is poor. Both the telephone inquiry and the download copy require logging into a secure one-zone server, and the download copy further increases the likelihood of non-secure media or machine access to the entire system. Once wrong manual operation occurs in the login or download process, certain influence is generated on the system operation.
Fourthly, the reliability is low. It is difficult to accurately describe a large number of messages completely, and when a problem occurs, the wrong message is often only a few bytes or even only a few bits short.
Fifth, real-time performance is not sufficient. The messages have strong real-time performance and burstiness, and some messages are generated along with some operations in the system, such as switch deflection, remote control command issuing and the like. And some error messages are often generated when the system runs in certain boundary states, and the error phenomenon is not easy to reproduce. If the real-time performance is not strong, the reason for generating the message is difficult to judge after the system state is changed.
Disclosure of Invention
The invention aims to solve the problems that: at present, the urban rail transit network safety protection requires that an electric power monitoring system and an equipment management system are respectively in different network safety areas and are isolated from each other through strong logic. When an operation and maintenance workshop team and group debugs a communication channel of equipment, because a line factory and the equipment are widely distributed, communication messages are usually intercepted in a local debugging mode, and the problems of difficulty in obtaining message contents, low efficiency, poor safety, low reliability and insufficient real-time performance exist.
The invention aims to provide a method for conveniently and quickly and intensively checking and diagnosing power supply equipment communication messages of a production control large area to operation and maintenance team and staff of an equipment operation and maintenance large area.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for exchanging message data between a power supply monitoring system and an equipment operation and maintenance system is used for power supply monitoring of urban rail transit and the equipment operation and maintenance system. The real-time message of the power supply equipment communication channel of the production control large area is transmitted to an equipment management large area server through cross-area isolation, and a WEB service is provided for an operation and maintenance workshop team to use a WEB browser to intensively and remotely check the communication messages of each power supply monitoring equipment of the production control large area, and the method specifically comprises the following steps:
A) accessing a server of the equipment management large area through a WEB browser, acquiring real-time information of a power supply equipment communication channel of the production control large area, and checking a real-time message of the power supply equipment communication channel of the production control large area; after a WEB browser client logs in WEB service of an access equipment management area, a WEB service process of the access equipment management area sends a real-time message of a power supply equipment communication channel of a production control area to the browser client; the method comprises the steps that a WEB browser client selects a power supply equipment communication channel to be checked, a power supply equipment communication channel keyword is sent to a WEB service process of an equipment management large area, the WEB service process sends the power supply equipment communication channel keyword to an equipment management large area message service process, and the equipment management large area message service process sorts and combines the power supply equipment communication channel keyword and sends the power supply equipment communication channel keyword to a production control large area communication message forwarding service process through forward and reverse data transmission;
B) the production control large-area communication message forwarding service process subscribes corresponding messages to the power supply equipment communication channel process of the production control large-area according to the received power supply equipment communication channel keywords, the power supply equipment communication channel process of the production control large-area sends original equipment communication messages to the production control large-area communication message forwarding service process, the production control large-area communication message forwarding service process sends the original equipment communication messages to the equipment management large-area communication message forwarding service process through forward and reverse data transmission, and a channel message high-speed cache is established on a server of the equipment management large-area;
C) after the equipment management large area communication message forwarding service process confirms that the received message is valid, the original equipment communication message is written into a channel message cache on a server of the equipment management large area, and a WEB service process of the equipment management large area reads the channel message cache at regular time and sends the read message to a WEB browser client.
Further, forward and reverse data transmission means that a communication mechanism combining forward isolation and reverse isolation is adopted to form a complete ground communication loop when cross-region isolation transmission is carried out between a production control large region and an equipment management large region; the method specifically comprises the following steps of message interception and message forwarding:
A) message interception: the trans-regional isolation transmission from the production control large area to the equipment management large area is completed by an intra-regional communication program and a trans-regional forwarding program, the trans-regional forwarding program is deployed in the production control large area and the equipment management large area, and the message interception process of the trans-regional isolation transmission is as follows: the message to be trans-regional transmitted and the message to be intra-regional transmitted are both stored in a forwarding message queue, and in the process of message transmission, a trans-regional forwarding program analyzes a subscription message event number or a node name in a header of a forwarding message according to a trans-regional message subscription list sent by a receiving region, automatically intercepts the message to be sent to a production control large region or an equipment management large region, namely the trans-regional transmitted message, and stores the message to be trans-regional forwarded message queue;
B) message forwarding: after the intercepted trans-regional transmission message is stored in a trans-regional forwarding message queue, a forwarding process is started; the message forwarding comprises three stages of message forwarding preparation, message forwarding and message receiving and response:
(1) a message forwarding preparation stage: if the message transmitted across the district is forwarded to the equipment management district from the production control district, the transregional forwarding program executes the buffer logic, sets the buffer of the message to be forwarded across the district, buffers the message according to the set time and the threshold value of the size of the buffer district, and enters the message forwarding stage when the buffer time is up or the buffer district is full; if the trans-regional transmitted message is forwarded to the production control large area from the equipment management large area, the trans-regional forwarding program executes message format conversion logic, converts the trans-regional transmitted message into a message document meeting the requirements of the national grid company Q/GDW-215-2008-electric power system data markup language-E language specification by binary coding, encrypts the message document, and then enters a reverse isolation program to prepare for forwarding the encrypted message document;
(2) a message forwarding stage: if the message transmitted across the district is forwarded to the equipment management district from the production control district, the cached message is forwarded to the opposite end node through the established TCP link, the message is unpacked after the trans-district forwarding program of the opposite end receives the message, the message is divided into a plurality of small messages, and the small messages are sequentially forwarded to a server of the equipment management district; if the message transmitted from the equipment management area to the production control area in a cross-area mode is transmitted, the cross-area transmitting program of the equipment management area transmits the encrypted message document to the production control area through the FTP program and the reverse isolation program, and the cross-area transmitting program of the production control area receives the encrypted message document, converts the encrypted message document into a binary message code and transmits the binary message code to a target node;
(3) the receiving and responding stage of the forwarding message: if the message data received by the receiving area is complete and the serial numbers are continuous, the successful response message is sent periodically according to a set time threshold value, the message is transmitted to the sending area through a message sending path of the receiving area, and all the messages in a period of time are confirmed to be successfully received; if the receiving area judges that the message forwarding fails or the message unpacking fails, a failure response message is immediately sent through a message sending path of the receiving area, and the failure response message contains a message number to be retransmitted, so that the forwarding program of the sending area can be retransmitted in time.
The invention has the beneficial effects that:
with the development of rail transit construction, the line construction is more and more, and the electric power equipment that distributes along the line is also more and more, consequently more and more to the requirement of electric power monitored control system maintenance, no matter newly increase line equipment or reform transform line equipment, often all relate to corresponding equipment communication channel inspection and maintenance. The message content of each equipment communication channel in the production control large area can be conveniently and rapidly and intensively checked in the equipment operation and maintenance large area, and the efficiency of equipment communication maintenance of the power monitoring system can be greatly improved.
Drawings
FIG. 1 is a schematic deployment diagram of the present invention;
FIG. 2 is an overall cross-zone communication data flow example of one zone to three zones of the present invention;
fig. 3 is a flow of forwarding a three-region-channel message inspection request and a flow of checking a stub list according to the present invention, wherein (a) is a flow of forwarding a three-region-channel message inspection request, and (b) is a flow of checking a stub list;
FIG. 4 is a flow of a channel-to-channel message subscription and forwarding of the present invention;
fig. 5 is a flow of receiving a three-region collection packet and displaying a page according to the present invention, in which (a) is a receiving flow and (b) is a page displaying flow.
Detailed Description
The invention discloses a method for exchanging message data between a power supply monitoring system and an equipment operation and maintenance system, which is used for power supply monitoring and equipment operation and maintenance systems of urban rail transit, wherein as shown in figure 1, according to a safety network architecture, the power supply monitoring system is deployed in a production control large area (hereinafter referred to as a safety first area and a safety first area), the equipment operation and maintenance system is deployed in an equipment management large area (a safety third area and a safety third area), and strong logic isolation is formed between the two areas. The power supply equipment communication channel message in the first safety area is transmitted to a server in the third safety area through cross isolation, and the operation and maintenance workshop team is provided to access the server by using a WEB browser, so that the equipment communication message and the state information in the first safety area can be intensively and remotely checked:
A) establishing a browser client connected with the safe three-area operation and maintenance server, accessing the safe three-area server through a WEB browser, acquiring real-time information of a communication channel of the safe one-area power supply equipment, checking a real-time message of the communication channel of the safe one-area power supply equipment, and after the browser client logs in the WEB service of the three areas, sending all channel information to the browser client by a safe three-area WEB service process; the method comprises the steps that a browser client selects a power supply equipment communication channel to be checked, keywords of the power supply equipment communication channel are sent to a WEB service process of a three-safety zone, the WEB service process sends the keywords of the power supply equipment communication channel to a three-safety zone message service process, and the three-safety zone message service process sorts and combines the keywords of the power supply equipment communication channel and sends the keywords to a first-safety zone communication message forwarding service process through forward and reverse data transmission;
B) the method comprises the steps that a safe first-zone message service process subscribes corresponding messages to a channel process of first-zone power supply equipment communication according to received power supply equipment communication channel keywords, the channel process sends original equipment communication messages to a safe first-zone communication message forwarding service process, the safe first-zone communication message forwarding service process sends the original channel messages to a safe third-zone communication message forwarding service process through forward and reverse data transmission, and channel message high-speed cache is established on a server of the safe third zone;
C) and after the safe three-zone communication message forwarding service process confirms that the received message is effective, writing the original channel message into the safe three-zone channel message cache, regularly reading the channel message cache by the safe three-zone WEB service process, and sending the read message to the browser client.
The forward and reverse data transmission means that a communication mechanism combining forward isolation and reverse isolation is adopted to form a complete ground communication loop when trans-regional isolation transmission is carried out between the first safety region and the third safety region; the method comprises the following steps of message interception and message forwarding:
A) message interception: the cross-region data communication from the first region to the third region is completed by an intra-region communication program and a cross-region forwarding program. The trans-regional forwarding program is deployed in a first region and a third region, and the message interception process of trans-regional transmission is as follows: the method comprises the steps that a message needing trans-regional transmission and a message needing trans-regional transmission are stored in a message forwarding queue, a trans-regional forwarding program analyzes a subscription message event number or a node name in a forwarding message header according to a trans-safety-region message subscription list sent by a receiving region in the message transmission process, automatically intercepts the message needing to be sent to a safety one region or a safety three region, namely the trans-regional transmission message, and stores the message into the trans-safety-region message forwarding queue;
B) message forwarding: after the intercepted trans-zone transmission message is stored in a trans-safety zone forwarding message queue, a forwarding process is started, and the message forwarding comprises the following steps: the method comprises three stages of message forwarding preparation, message forwarding, message receiving and response:
(1) a message forwarding preparation stage: if the message is forwarded from the first area to the third area, the trans-regional forwarding program executes a buffering logic, sets a trans-safety region to-be-forwarded message buffer, buffers the message according to the set time and the threshold value of the size of the buffer region, and enters a message forwarding stage when the buffering time is up or the buffer region is full; if the message is forwarded from the three areas to the first area, the trans-area forwarding program executes message format conversion logic, converts the message from binary codes into a document meeting the requirements of the national power grid company Q/GDW-215 + 2008_ "electric power system data markup language-E language specification", encrypts the document, and then enters a reverse isolation device program to prepare for forwarding the formatted message document;
(2) a message forwarding stage: if the message is forwarded from one area to three areas, the cached message is forwarded to an opposite end node through an established TCP link, the message is unpacked after a cross-area forwarding program of the opposite end receives the message through a forward isolation device, the message is divided into a plurality of small messages, and the small messages are sequentially forwarded to a server of the three areas; if the message is forwarded from the three areas to the first area: the trans-regional forwarding program of the three regions transmits the formatted message document to the first region through the FTP program and the reverse isolation device, and the trans-regional forwarding program of the first region receives the formatted message document, converts the formatted message document into binary message codes and forwards the message to a destination node;
(3) the receiving and responding stage of the forwarding message: receiving messages by a receiving area trans-regional forwarding program, if the data is complete and the serial numbers are continuous, sending successful response messages periodically according to a set time threshold value, transmitting the messages to a sending area through a message sending path of the receiving area, confirming that all the messages in a period of time are successfully received, and if the receiving area judges that the message forwarding fails or the message unpacking fails, immediately sending failed response messages through the message sending path of the receiving area and including message numbers needing to be retransmitted so as to retransmit the forwarding programs of the sending area in time.
The specific implementation mode of the invention comprises four aspects: as shown in fig. 2, the overall cross-zone communication data flow from one zone to three zones is as follows:
1) three district's passageway information and collection server go up equipment communication data automatic maintenance: establishing a high-speed cache on the three-area operation and maintenance server, mapping a first-area equipment communication data and channel information table, receiving information transmitted by a first area by the three-area operation and maintenance server through forward and reverse data transmission, and updating the information to the high-speed cache of the three area in real time;
2) and the three areas check and request forwarding: the page sends the channel keywords to be checked and the checking mode to a WEB service process, the WEB service process forwards the channel keywords to a three-region communication message forwarding service process, and the communication message forwarding service process combines the same requests and then sends the channel keywords to a one-region communication message forwarding service process through forward and reverse data transmission;
3) a first area of message subscription and forwarding: after receiving the channel message viewing request, the first-zone communication message forwarding service process subscribes a channel message to a collection channel on a collection node, acquires the channel message through a network platform interface, transmits the channel message to the third zone by using forward and reverse data transmission, and receives the channel message by the third-zone communication message forwarding service process;
4) receiving the three-region collected message and displaying the page: and establishing a high-speed cache on the three-region operation and maintenance server, and storing the acquired message content received by the three-region communication message forwarding service process. And the three-region WEB service process reads the message cache at regular time and sends the message content to a page required to be checked by utilizing the Ajax technology.
Automatic maintenance of one-area and three-area channel information and collected data
The channel information mainly comprises information such as channel configuration conditions, parameters of protocols, channel operation conditions, on-duty states of the main channel and the standby channel, operation rate statistics, error rate statistics, on-off statistics, switching records and the like. The equipment communication data on the acquisition server refers to RTU information, telemetering, remote signaling, remote pulse, remote control, remote regulation, lifting and other data information received by a region. By establishing a cache in the three areas, mapping the data in the first area, utilizing a forward and reverse data transmission technology and a network platform technology, calling a network platform interface by a data service process in the three areas to subscribe operation information such as addition, deletion, modification and the like of the corresponding data in the first area, and carrying out the same operation in the three areas according to the information, the automatic maintenance of the equipment communication data and the channel information on the acquisition server in the three areas is realized.
The Web service of the three-region operation and maintenance server uses Tomcat, calls a data interface realized by C + + through a jni type interface of Java language, and regularly accesses three-region channel information and acquires a data cache. Generating a json (a data format supported by JavaScript) file which accords with the actual situation according to the channel information obtained by each access, sending the json file to a client page by using an Ajax technology, and displaying the json file in a tree list form by Extjs. Using a similar approach, RTU information, telemetry, elevation, etc. data can be viewed at the client.
The automatic maintenance of the collected data and the channel information enables three areas to conveniently obtain the channel and the data information of one area, the manual maintenance process is omitted, and meanwhile, the data analyzed from the message on the collection server of the one area can be checked in a quasi-real-time mode.
Second and third area channel message checking request forwarding
After the client opens the collected message viewing page as shown in fig. 3 (a), information of each channel is acquired through the json file used in the tree list, a mouse operation is performed on the page, and a keyword of a channel message to be queried is sent to a WEB service process. The WEB service process records the session information (in Tomcat, the character string JSESSIONID) identifying each client page, and transmits the keyword to the three-region communication packet forwarding service process through the network middleware. During the period that the client page browses the channel message, namely the session is effective and before the channel keyword changes, the WEB service sends a message check request of the channel to the three-region communication message forwarding service process at the frequency of once every 10 seconds so as to keep the activation state of the request.
The three-region communication message forwarding service process maintains a request stub queue, and records the channel key words of the requested channel message and the latest time mark of the request. After a request forwarded by a WEB service is received, firstly, whether a stub with the same request already exists is searched in a stub queue according to a channel key word. If so, the timestamp of the stub is updated, otherwise a new stub is added. Therefore, for the same channel message requests from different client pages, only one stub needs to be reserved, and the requirement of simultaneously checking multiple clients can be met by establishing a subsequent channel message cache.
As shown in fig. 3 (b), the three-region communication packet forwarding service process starts a thread, traverses the stub queue once per second, and deletes the stub from the queue if no client is querying for the channel packet corresponding to the stub when the update time scale of the stub is 10 seconds earlier than the current time (i.e., the activation frequency of the previous WEB service). After the stub is deleted, no request is sent to one region, and the message sent by one region is not written into the cache.
Third, first area channel message subscription and forwarding
The first-zone acquisition communication uses a plug-in protocol technology, and protocol plug-ins are assembled in each channel thread through a pipeline. Each protocol plug-in inherits the base class which meets the requirement of the pipeline, and abstracts interfaces such as data transmission to an upper layer protocol plug-in or a lower layer protocol plug-in. The complexity of the protocol plug-in can be reduced by using the plug-in protocol technology, each protocol plug-in only needs to consider the logic relation in a part of range, and meanwhile, the reusability of codes is improved. The protocol can be generally divided into a link layer protocol plug-in at a lower layer and an application layer protocol plug-in at an upper layer, and more layers of protocol plug-ins can be used for realizing complex protocols. By checking protocol messages of different levels, the source of the fault can be more accurately positioned.
As shown in fig. 4. After a message service process in one area sends out a subscription request containing channel keywords, the network platform sends the subscription request in a multicast way. And after the channel process of each acquisition node receives the subscription request, judging whether the subscribed channel specification object exists in the channel according to the keywords. If the channel is in the channel, whether a region message service process is in a subscription receiving list of the channel protocol is judged. If not, the node information and the process information of the message service process in the region are taken as keywords to be put into a subscription list. When a new message is received or sent in the channel, the channel traverses the subscription list and sends a copy of the message to each process in the list. And after receiving the subscribed message, the first region message service process calls a forward and reverse transmission interface to send the message to the third region message service process.
Receiving and page display of four-region and three-region collected messages
The three-region operation and maintenance server establishes a message cache, the cache is managed in a circular table mode, the capacity of the circular table is determined by the maximum number of clients which are designed and browsed simultaneously, and concurrent operation and consumption of storage resources are considered. After receiving the collected message, the three-region communication message forwarding service process firstly searches in a request stub queue. If finding the stub, writing the message into the cache, otherwise directly discarding.
And the WEB service process regularly searches the message cache according to the channel key word corresponding to each session. If the viewing request of the client message needs to explain the message (namely the received message meaning is shown by using the descriptive language), the WEB service process calls a static interpretation interface of a corresponding protocol plug-in to interpret the message source code taken out from the cache.
And the page uses the Extjs to realize the functions of formatted output, scrolling, pausing, clearing and the like of the message.
As shown in fig. 5 (a), after receiving the channel packet, the three-region packet service process searches whether a channel keyword corresponding to the packet exists in the stub list. If not, the message is discarded. And if so, writing the message into a message cache established by the three-region operation and maintenance server.
As shown in fig. 5 (b), in the WEB service thread corresponding to each client page session, the latest packet cache concerned by the page is retrieved at regular time, and the retrieval time period is the regular retrieval interval. And if the retrieval result is empty, continuing to wait. When a retrieval result exists, judging whether the message needs to be explained according to the page request parameter, and if the message does not need to be explained, directly sending the message to a client page; if the message needs to be explained, calling a protocol plug-in to explain the message and then sending the message to a client page.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. A method for interacting message data of a power supply monitoring system with an equipment operation and maintenance system is used for urban rail transit power supply monitoring and the equipment operation and maintenance system, the power supply monitoring system is deployed in a production control large area according to a safety network architecture, the equipment operation and maintenance system is deployed in an equipment management large area, and strong logic isolation is adopted between the equipment operation and maintenance system and the equipment management large area, and the method is characterized in that real-time messages of a power supply equipment communication channel of the production control large area are transmitted to an equipment management large area server through cross-area isolation, and WEB services are provided for operation and maintenance workshop teams to use a WEB browser to intensively and remotely check each power supply monitoring equipment communication message of the production control large area, and the method specifically comprises:
A) accessing a server of the equipment management large area through a WEB browser, acquiring real-time information of a power supply equipment communication channel of the production control large area, and checking a real-time message of the power supply equipment communication channel of the production control large area; after a WEB browser client logs in WEB service of an access equipment management area, a WEB service process of the access equipment management area sends a real-time message of a power supply equipment communication channel of a production control area to the browser client; the method comprises the steps that a WEB browser client selects a power supply equipment communication channel to be checked, a power supply equipment communication channel keyword is sent to a WEB service process of an equipment management large area, the WEB service process sends the power supply equipment communication channel keyword to an equipment management large area message service process, and the equipment management large area message service process sorts and combines the power supply equipment communication channel keyword and sends the power supply equipment communication channel keyword to a production control large area communication message forwarding service process through forward and reverse data transmission;
B) the production control large-area communication message forwarding service process subscribes corresponding messages to the power supply equipment communication channel process of the production control large-area according to the received power supply equipment communication channel keywords, the power supply equipment communication channel process of the production control large-area sends original equipment communication messages to the production control large-area communication message forwarding service process, the production control large-area communication message forwarding service process sends the original equipment communication messages to the equipment management large-area communication message forwarding service process through forward and reverse data transmission, and a channel message high-speed cache is established on a server of the equipment management large-area;
C) after the equipment management large area communication message forwarding service process confirms that the received message is valid, the original equipment communication message is written into a channel message cache on a server of the equipment management large area, and a WEB service process of the equipment management large area reads the channel message cache at regular time and sends the read message to a WEB browser client.
2. The method for exchanging message data between a power supply monitoring system and an equipment operation and maintenance system according to claim 1, wherein the forward and reverse data transmission means that a communication mechanism combining forward isolation and reverse isolation is adopted to form a complete ground communication loop when cross-region isolation transmission is performed between a production control large region and an equipment management large region; the method specifically comprises the following steps of message interception and message forwarding:
A) message interception: the cross-region isolation transmission from the production control large region to the equipment management large region is completed by an intra-region communication program and a cross-region forwarding program, a message needing cross-region transmission and a message needing intra-region transmission are both stored in a forwarding message queue, the cross-region forwarding program analyzes a subscription message event number or a node name in a header of the forwarding message according to a cross-region message subscription list sent by a receiving region in the message transmission process, automatically intercepts a message needing to be sent to the production control large region or the equipment management large region, namely the cross-region transmission message, and stores the message into the cross-region forwarding message queue;
B) message forwarding: after the intercepted trans-regional transmission message is stored in a trans-regional forwarding message queue, a forwarding process is started; the message forwarding comprises three stages of message forwarding preparation, message forwarding and message receiving and response:
(1) a message forwarding preparation stage: if the message transmitted across the district is forwarded to the equipment management district from the production control district, the transregional forwarding program executes the buffer logic, sets the buffer of the message to be forwarded across the district, buffers the message according to the set time and the threshold value of the size of the buffer district, and enters the message forwarding stage when the buffer time is up or the buffer district is full; if the trans-regional transmitted message is forwarded to the production control large area from the equipment management large area, the trans-regional forwarding program executes message format conversion logic, converts the trans-regional transmitted message into a message document meeting the requirements of a national power grid company by binary coding and encrypts the message document, and then enters a reverse isolation program to prepare for forwarding the encrypted message document;
(2) a message forwarding stage: if the message transmitted across the district is forwarded to the equipment management district from the production control district, the cached message is forwarded to the opposite end node through the established TCP link, the message is unpacked after the trans-district forwarding program of the opposite end receives the message, the message is divided into a plurality of small messages, and the small messages are sequentially forwarded to a server of the equipment management district; if the message transmitted from the equipment management area to the production control area in a cross-area mode is transmitted, the cross-area transmitting program of the equipment management area transmits the encrypted message document to the production control area through the FTP program and the reverse isolation program, and the cross-area transmitting program of the production control area receives the encrypted message document, converts the encrypted message document into a binary message code and transmits the binary message code to a target node;
(3) the receiving and responding stage of the forwarding message: if the message data received by the receiving area is complete and the serial numbers are continuous, the successful response message is sent periodically according to a set time threshold value, the message is transmitted to the sending area through a message sending path of the receiving area, and all the messages in a period of time are confirmed to be successfully received; if the receiving area judges that the message forwarding fails or the message unpacking fails, a failure response message is immediately sent through a message sending path of the receiving area, and the failure response message contains a message number to be retransmitted, so that the forwarding program of the sending area can be retransmitted in time.
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