CN109687411B - Fixed value synchronous operation method and device for distributed element protection - Google Patents
Fixed value synchronous operation method and device for distributed element protection Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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Abstract
The invention discloses a fixed value synchronous operation method and device for distributed element protection. The constant value synchronous operation method comprises a method for remotely and synchronously modifying the protection constant value of each submachine and a method for remotely and synchronously switching the constant value areas of each submachine; the constant value synchronous operation device includes: the method comprises the steps of remotely and synchronously modifying the protection constant value parts of all the submachine and remotely and synchronously switching the constant value area parts of all the submachine; the remote synchronous switching of each submachine constant value area part comprises the following steps: and the management host forwards a command for switching the constant value area to each sub-machine, feeds back a switching result and constant value CRC (cyclic redundancy check) to the management host after each sub-machine switches the constant value area, and replies the information of all the sub-machines to the client after summarizing. The invention provides a feasible method for the protection and modification of the fixed value of the cross-interval element which is installed in a distributed mode and configured in a main mode, ensures the consistency of the protection fixed value of each submachine in operation, and provides guarantee for the reliable and stable operation of the relay protection device.
Description
Technical Field
The invention relates to the field of relay protection of a power system, in particular to a method and a device for protecting constant value synchronous operation of a span interval element (a main transformer and a bus) with main configuration in distributed installation and management of multiple submachine of an intelligent substation.
background
The intelligent substation develops rapidly, has promoted relay protection technical innovation powerfully. In recent years, the technical development in the fields of chips, communication and the like is changing day by day, and conditions are created for the development of a relay protection technology. At present, the intelligent substation relay protection adopts a new in-situ protection technology characterized by sampling digitization, protection in-situ, element protection networking, and information sharing, wherein element protection such as main transformer protection, bus protection and the like adopts a protection system which is installed in a multi-submachine distributed manner and is configured without a master.
In actual engineering implementation, it is found that in the no-master configuration mode, information management and fixed value management of each slave machine in the whole set of protection have certain defects, and when the protection fixed value is modified, a client needs to operate all slave machines at the same time, so that reliability, rapidity and synchronism are difficult to guarantee. In 2018, aiming at inter-interval element protection, a new idea of distributed installation and main management is provided by national grid limited companies, and novel distributed relay protection research is developed according to the scheme. Under the distributed installation and the main management framework, all the submachine share data and are independently judged, and the integrated protection judgment and trip exit functions are realized.
therefore, how to provide a fast and reliable fixed value synchronous operation method is a problem to be solved at present in distributed installation and protection of a master management element.
Disclosure of Invention
In view of this, the present invention provides a method for distributed installation and management of multi-substation distributed protection constant value synchronization operations of bay components (main transformer and bus) with main configuration in an intelligent substation, so as to achieve rapidity and synchronization of operations of modifying each substation constant value and switching a constant value area in a whole set of protection by a remote client.
In order to achieve the purpose, the invention adopts the following technical scheme: a constant value synchronous operation method for distributed element protection comprises a remote synchronous modification method for protecting constant values of all submachine and a remote synchronous switching method for constant value areas of all the submachine;
The method for remotely and synchronously modifying the protection fixed value of each submachine comprises the following steps:
Step 1.1, the management host receives a command of setting a constant value editing area by the client, synchronously forwards the command to other submachine which are normally communicated in the whole set of protection through the protection ring network, replies a confirmation result to the management host after each other submachine sets the constant value editing area, and feeds back the result of whether the constant value editing area is successfully set to the client after the management host summarizes reply information of all the submachine;
Step 1.2, the management host receives a command of modifying the fixed value of the client, synchronously forwards the command to all the submachine which are successfully modified by the fixed value editing area in the whole set of protection through the protection ring network, replies a confirmation result to the management host after the modification of other submachine is finished, and feeds back the result of whether the fixed value is successfully modified or not to the client after the management host summarizes reply information of all the submachine;
Step 1.3, the management host receives a command of a client terminal for curing the fixed value, forwards all the submachine with successfully modified set values through the protection ring network, immediately executes and calculates the fixed value CRC after other submachine receive the curing command, then replies the curing result and the CRC to the management host, and feeds back the client terminal to complete the fixed value modification after the management host summarizes the curing result replied by all the submachine;
the method for remotely and synchronously switching the constant value areas of all the submachine comprises the following steps:
Step 2.1, the management host receives a command of switching the constant value area from the client, synchronously forwards the command to other submachine which are normally communicated in the whole set of protection through the protection ring network, and after each other submachine executes the command of switching the constant value area, the management host returns the result of whether the area is successfully switched;
and 2.2, after the management host receives the results of all other sub-machine district cutting, assembling a total mark and feeding back the total mark to the client.
The distributed installation and management has the main configuration and the protection of the cross-interval elements is completed by the cooperative matching of a plurality of submachine. Each sub-machine has an independent protection logic function, one sub-machine can be selected as a whole set of protected management host, and the whole set of management functions for protecting all the sub-machines are born, including communication between a protection device and a remote client, and the protection logic function relates to a protection signal uploading control layer, a whole set of protection constant value management for protecting each sub-machine, and the like.
As a supplement to the fixed value synchronization operation method, in step 1.1, after receiving a command of setting a fixed value editing area at a client, a management host scans communication states of all sub-machines in the whole set of protection, determines and memorizes which sub-machines are in normal communication, adds a tag to the command of setting the fixed value editing area, adds the command to an ASDU fixed by a ring network message, and synchronously forwards the command to all sub-machines in normal communication through the protection ring network; the protection sub-machine immediately executes the command after receiving the command of the set constant value editing area and feeds back an execution result to the management host machine; the management host analyzes the feedback result of the set constant value editing area from the received message data of the submachine, if all the submachines are successfully set, the protection setting editing area is successfully replied to the client, and if any submachine is failed to be set, the protection setting editing area is failed to be replied to the client.
As a supplement to the fixed value synchronization operation method, in step 1.2, after receiving a command for modifying the fixed value from the client, the management host adds a tag to the command for modifying the fixed value, adds the command to an ASDU fixed in the ring network message, and synchronously forwards the command to all the slave units successfully configured in the editing area through the protected ring network; the protection sub-machine immediately executes after receiving the fixed value modification command, and feeds back an execution result to the management main machine; and the management host analyzes the feedback result of the modification constant value from the received message data of the submachine, if all the submachines are successfully modified, the protection modification success is replied to the client, and if any submachine is failed to be modified, the protection modification constant value is replied to the client.
As a supplement to the fixed value synchronous operation method, in step 2.1, after receiving a command for switching the fixed value area from the client, the management host scans the communication states of all the submarines in the whole set of protection, determines and memorizes which submarines are normal in communication, adds a label to the command for switching the area, adds the command to the ASDU fixed by the ring network message, and synchronously forwards the command to all the submarines with normal communication through the protection ring network; the protection sub-machine immediately executes solidification after receiving the command of modifying the cutting area and calculates a fixed value CRC; and then feeding back the curing result and the CRC to the management host.
As a supplement to the fixed value synchronization operation method, in step 2.2, the management host analyzes the feedback result of the solidified fixed value in the message data of the sub-machines received by the management host, if all the sub-machines are successfully solidified and the CRCs are consistent, the synchronization correction fixed value is successfully replied to the client, and if any sub-machine CRC is different, the synchronization correction fixed value is unsuccessfully replied to the client.
the invention adopts another technical scheme that a constant value synchronous operation device for distributed element protection is provided, which comprises a remote synchronous modification part for protecting each submachine and a remote synchronous switching part for switching each submachine constant value area;
the remote synchronous modification of the protection constant value part of each submachine comprises the following steps:
1) the unit is used for synchronously setting the editing areas of all the submachine, and after the management host forwards a command for setting the constant value editing area to the submachine, the submachine sets the editing areas and feeds back a result to the management host;
2) The unit is used for synchronously modifying the constant value of each sub-machine editing area, and after the management host forwards a command for modifying the constant value to the sub-machines, the sub-machines modify the constant value and feed back the result to the management host;
3) The unit is used for solidifying the constant value of each sub-machine editing area, and after the management host machine forwards a command of solidifying the constant value to the sub-machines, the sub-machines solidify the constant value and feed back the result to the management host machine;
the remote synchronous switching of each submachine constant value area part comprises the following steps:
and the management host forwards a command for switching the constant value area to each sub-machine, feeds back a switching result and constant value CRC (cyclic redundancy check) to the management host after each sub-machine switches the constant value area, and replies the information of all the sub-machines to the client after summarizing.
as a supplement to the constant value synchronous operation device, in the unit for synchronously setting the editing areas of the sub-machines, after receiving a command of setting the constant value editing area by the client, the management host scans the communication states of all the sub-machines in the whole set of protection, determines and memorizes which sub-machines are in normal communication, adds a tag to the command of setting the constant value editing area, adds the command into an ASDU fixed by a ring network message, and synchronously forwards the command to all the sub-machines in normal communication through the protection ring network; the protection sub-machine immediately executes the command after receiving the command of the set constant value editing area and feeds back an execution result to the management host machine; the management host analyzes the feedback result of the set constant value editing area from the received message data of the sub machines, if all the sub machines are successfully set, the protection setting editing area is successfully replied to the client, and if any sub machine fails to be set, the protection setting editing area is failed to the client.
As a supplement to the constant value synchronous operation device, in the unit for synchronously modifying the constant values of the editing areas of the sub-machines, the management host receives a command of modifying the constant values from the client, adds a tag to the command of modifying the constant values, adds the command of modifying the constant values to the ASDU fixed by the ring network message, and synchronously forwards the command of modifying the constant values to all the sub-machines successfully arranged in the editing areas through the protection ring network; the protection sub-machine immediately executes after receiving the fixed value modification command, and feeds back an execution result to the management main machine; the management host analyzes the feedback result of the modification constant value from the received sub-machine message data, if all the sub-machines are successfully modified, the protection modification success is replied to the client, and if any sub-machine is failed to be modified, the protection modification constant value is replied to the client.
as a supplement to the fixed value synchronous operation device, in the unit for fixing the fixed values of the respective submachine, after receiving a command for fixing the fixed values from the client, the management host adds a tag to the command for fixing the fixed values, adds the command for fixing the fixed values to the ASDU fixed by the ring network message, and synchronously forwards the command for fixing the fixed values to all the submachines successfully modified by the protection ring network; the protection sub-machine immediately executes solidification after receiving the fixed value modification command, and calculates a fixed value CRC; then feeding back the curing result and CRC to the management host; and the management host analyzes the feedback result of the solidification fixed value from the received sub-machine message data, if all the sub-machines are successfully solidified and the CRCs are consistent, the synchronous modification fixed value is successfully replied to the client, and if any sub-machine CRC is different, the synchronous modification fixed value is failed to reply to the client.
As a supplement to the constant value synchronous operation device, in the synchronous switching constant value area unit, after receiving a command for switching the constant value area from the client, the management host scans the communication states of all the submarines in the whole set of protection, determines and memorizes which submarines are normal in communication, adds a label to the command for switching the submarines, adds the command for switching the submarines into an ASDU (application specific data Unit) with a fixed looped network message, and synchronously forwards the command for switching the submarines to all the submarines with normal communication through the; the protection sub-machine immediately executes solidification after receiving the command of modifying the cutting area and calculates a fixed value CRC; then feeding back the curing result and CRC to the management host; and the management host computer sends a feedback result of analyzing the curing fixed value in the received sub-computer message data, if all the sub-computers are successfully cured and the CRCs are consistent, the synchronous modification fixed value is successfully replied to the client, and if any sub-computer CRC is different, the synchronous modification fixed value is failed to reply to the client.
compared with the prior art, the invention has the following improvement effects:
Under the distributed installation and management mode with the main mode, the data sharing and the independent protection functions of the multiple submachine can be ensured, and the problems of long time consumption and poor synchronism of the client side in the fixed value operation can be solved. According to the method and the device for the synchronous operation of the protection fixed value of the distributed element, a feasible method is provided for the protection modification fixed value of the cross-interval element which is installed in a distributed mode and configured in a main mode, the consistency of the protection fixed value of each submachine in operation is ensured, and the reliable and stable operation of a relay protection device is guaranteed. Test data show that the fixed value synchronous operation of 4 submachine can be completed within 1ms after the management host receives the instruction of the client by adopting the fixed value synchronous operation method and the device, and the rapidity and the synchronism of the method are greatly improved.
Drawings
FIG. 1 is a diagram of a protection model of a main transformer installed and managed in a distributed manner according to an embodiment of the present invention;
FIG. 2 is a diagram of a protection model with main buses installed and managed in a distributed manner according to an embodiment of the present invention;
FIG. 3 is a flow chart of the present invention for modifying the setting value;
FIG. 4 is a flow chart of the handover timing zone implementation of the present invention.
Detailed Description
the invention is described in detail below with reference to the accompanying drawings.
example 1
the embodiment is a fixed value synchronous operation method for distributed element protection, which comprises a method for remotely and synchronously modifying the fixed value of each sub-machine protection and a method for remotely and synchronously switching each sub-machine fixed value area. The remote synchronous modification flow of the protection fixed values of all the submachine as shown in the step of figure 3 is as follows:
Step 1, the management host receives a command of setting a constant value editing area by a client, synchronously forwards the command to other submarines with normal communication in the whole set of protection through a protection ring network, replies a confirmation result to the management host after each other submarines set the constant value editing area, and feeds back the result of whether the constant value editing area is successfully set to the client after the management host summarizes reply information of all the submarines;
Step 2, the management host receives a command of modifying the fixed value of the client, synchronously forwards the command to all the submachine which are successfully set in the fixed value editing area in the whole set of protection through the protection ring network, replies a confirmation result to the management host after the modification of other submachine is finished, and feeds back the result of whether the fixed value modification is successful or not to the client after the management host summarizes reply information of all the submachine;
and 3, the management host receives a command of curing the fixed value of the client, forwards all the submachine with successfully modified set values through the protection ring network, immediately executes and calculates the fixed value CRC after other submachine receive the curing command, then replies the curing result and the CRC to the management host, and feeds back the curing result replied by all the submachine to the client to finish the fixed value modification.
For step 1, the objective is to complete the preparation before the fixed value modification, i.e. to prepare the editing area ready for the implementation of step 2. In normal operation of distributed protection, all of ASDU4, ASDU5, and ASDU6 in the ring network communication message sent by the management host are 0 values. After receiving the command of the client setting constant value editing area, the management host computer begins to assign values to the ASDU4 of the looped network message according to the client command, namely, the area number of the setting constant value editing area and the allowed command are written into corresponding data bits, meanwhile, the communication state of each submachine in the looped network is scanned, and the submachine with normal communication is memorized. Then, forwarding the data to the submachine with normal communication through the kilomega ring network; each sub-machine executes immediately after receiving the instruction of the setting constant value editing area of the management host, fills the result into the data bit representing the setting constant value editing area in the looped network message ASDU3 after the execution is finished, and then sends the message to the management host; the management host extracts data bits representing the set constant value editing area in the sub-machine feedback messages one by one, and feeds back the successful result of the set constant value editing area to the client after all the sub-machines with normal communication successfully feed back; and if the sub machine fails to reply or the sub machine does not reply any result within 1s, replying the failed information to the client if the whole set of protection setting value editing area is not successful.
For step 2, if the management host replies the information that the setting constant value editing area is successful to the client in step 1, the client will continue to issue a constant value modification instruction to the management host, and will issue all the constant values to be modified to the management host.
after receiving a request of modifying the fixed value by the client, the management host starts to assign a value to the ASDU5 of the ring network message according to a client instruction, namely, the instruction of allowing the fixed value to be modified, the fixed value editing area code and the protection fixed value are written into corresponding data bits in the ASDU5, and the management host forwards the value to the submachine with normal communication through the gigabit ring network according to the communication state of each submachine memorized in the step 1; each sub-machine executes immediately after receiving the command of the management host machine, fills the result into the data bit representing whether the fixed value is modified successfully or not in the looped network message ASDU3 after the execution is finished, and then sends the message to the management host machine; the management host extracts data bits representing whether the fixed value is successfully modified or not in the sub-machine feedback messages one by one, and feeds back the result of the successful fixed value modification to the client after all the sub-machines with normal communication successfully feed back; and if the sub machine fails to reply or the sub machine does not reply any result within 1s, replying the failed information to the client if the whole set of protection setting value editing area is not successful.
For step 3, if the management host replies the information that the fixed value modification is successful to the client in step 2, the client will continue to issue a fixed value storage command to the management host.
after receiving a request of a client for solidifying a fixed value, the management host starts to assign a value to the ASDU5 of the ring network message according to a client instruction, namely, an instruction for allowing the fixed value to be modified, a fixed value editing area code and a protection fixed value are written into a data bit corresponding to a second byte in the ASDU6, and the sub-machines with normal communication are forwarded through the gigabit ring network according to the communication state of each sub-machine memorized in the step 1; each sub-machine executes immediately after receiving the command of managing the host solidification setting value, fills the result into the data bit representing whether the solidification setting value is successful or not in the looped network message ASDU3 after the execution is finished, and then sends the message to the managing host; the management host extracts data bits representing whether the solidification constant value is successful or not in the sub-machine feedback messages one by one, and feeds back the result of successful solidification constant value to the client after all the sub-machines with normal communication successfully feed back; and if the sub machine fails to reply or the sub machine does not reply any result within 1s, replying the failed information to the client if the whole set of protection setting editing area is not successful.
the method for remotely and synchronously switching the constant value areas of all the submachine is shown as the step in figure 4:
After receiving the command of the client switching area, the management host starts to assign values to the ASDU6 of the ring network message according to the client command, namely writes the target fixed value area number and the allowed switching area command into corresponding data bits, simultaneously scans the communication state of each submachine in the ring network, and memorizes the submachine with normal communication. Then, the ring network message is forwarded to the submachine with normal communication through the kilomega ring network; each sub-machine executes immediately after receiving the command of switching the management host, fills the result into the data bit representing the switching fixed value area in the looped network message ASDU3 after the execution is finished, and then sends the message to the management host; the management host extracts data bits representing the switching constant value area in the sub-machine feedback messages one by one, and feeds back the successful result of the switching constant value area to the client after all the sub-machines with normal communication successfully feed back; and if the sub-machine fails to reply or the sub-machine does not reply any result within 1s, replying the failed information to the client if the whole set of protection switching constant value area is considered to be unsuccessful.
Example 2
The embodiment is a fixed value synchronous operation device for distributed element protection, which comprises a remote synchronous modification part for protecting fixed values of all submachine and a remote synchronous switching part for switching fixed value areas of all the submachine.
The remote synchronous modification of the protection constant value part of each submachine comprises the following steps:
1) The unit is used for synchronously setting the editing areas of all the submachine, and after the management host forwards a command for setting the constant value editing area to the submachine, the submachine sets the constant value editing area and feeds back a result to the management host;
2) the unit is used for synchronously modifying the constant value of each sub-machine editing area, and after the management host forwards a command for modifying the constant value to the sub-machines, the sub-machines modify the constant value and feed back the result to the management host;
3) And the unit is used for solidifying the fixed value of each submachine, and after the management host forwards a command for solidifying the fixed value to the submachine, the submachine solidifies the fixed value and feeds back the result to the management host.
The remote synchronous switching of each sub-machine constant value area part comprises a synchronous switching constant value area unit, the management host forwards a command for switching the constant value area to each sub-machine, each sub-machine feeds back a switching area result and constant value CRC to the management host after switching the constant value area, and the management host summarizes information of all sub-machines and then replies the information to the client.
in the unit for synchronously setting the editing areas of the sub-machines, after receiving a command of setting the constant value editing area by a client, the management host scans the communication states of all the sub-machines in the whole set of protection, determines and memorizes which sub-machines are in normal communication, adds a label to the command of setting the constant value editing area, adds the label to an ASDU (application program Unit) fixed by a looped network message, and synchronously forwards the command to all the sub-machines in normal communication through the protection looped network; the protection sub-machine immediately executes the command after receiving the command of the set constant value editing area and feeds back an execution result to the management host machine; the management host analyzes the feedback result of the set constant value editing area from the received message data of the sub machines, if all the sub machines are successfully set, the protection setting editing area is successfully replied to the client, and if any sub machine fails to be set, the protection setting editing area is failed to the client.
in the unit for synchronously modifying the constant value of each submachine editing area, after receiving a command of modifying the constant value from a client, the management host adds a label to the command of modifying the constant value, adds the command of modifying the constant value into an ASDU (application specific data Unit) fixed by a looped network message, and synchronously forwards the command to all the submachines successfully setting the editing area through a protection looped network; the protection sub-machine immediately executes after receiving the fixed value modification command, and feeds back an execution result to the management main machine; the management host analyzes the feedback result of the modification constant value from the received sub-machine message data, if all the sub-machines are successfully modified, the protection modification success is replied to the client, and if any sub-machine is failed to be modified, the protection modification constant value is replied to the client.
In the unit for solidifying the fixed value of each submachine, after receiving a command of solidifying the fixed value of a client, the management host adds a label to the command of solidifying the fixed value, adds the command of solidifying the fixed value into an ASDU (application specific data Unit) fixed by a looped network message, and synchronously forwards the command of solidifying the fixed value to all the submachines successfully modifying the fixed value through a protection looped network; the protection sub-machine immediately executes solidification after receiving the fixed value modification command, and calculates a fixed value CRC; then feeding back the curing result and CRC to the management host; and the management host analyzes the feedback result of the solidification fixed value from the received sub-machine message data, if all the sub-machines are successfully solidified and the CRCs are consistent, the synchronous modification fixed value is successfully replied to the client, and if any sub-machine CRC is different, the synchronous modification fixed value is failed to reply to the client.
in the synchronous switching constant value area unit, after receiving a command of switching the constant value area by a client, a management host scans the communication states of all submarines in the whole set of protection, determines and memorizes which submarines are normal in communication, adds a label to the command of switching the area, adds the command into an ASDU (application specific data Unit) fixed by a looped network message, and synchronously forwards the command to all the submarines which are normal in communication through a protection looped network; the protection sub-machine immediately executes solidification after receiving the command of modifying the cutting area and calculates a fixed value CRC; then feeding back the curing result and CRC to the management host; and the management host computer sends a feedback result of analyzing the curing fixed value in the received sub-computer message data, if all the sub-computers are successfully cured and the CRCs are consistent, the synchronous modification fixed value is successfully replied to the client, and if any sub-computer CRC is different, the synchronous modification fixed value is failed to reply to the client.
According to the constant value synchronous operation method and device for distributed element protection, the management host synchronously sets all the sub machine editing areas, synchronously modifies the constant values of all the sub machine editing areas, synchronously solidifies all the sub machine constant values and synchronously switches all the sub machine constant value areas. The forwarding of various synchronous commands of the management host computer and the feedback of various confirmation information of the submachine all relate to the transmission of data. A distributed installation of protection systems, as such, involves a looped network communication architecture, as shown in fig. 1 and 2. According to the synchronous operation method of the invention, the ring network communication protocol needs to be supplemented and perfected, and the number of ASDUs of an application data unit (APDU) is expanded to 6 (note that italic characters are the supplementary content of the invention). The following table specifically shows:
Table 1 distributed protection ring network APDU format definition
the ASDU _4 includes an edit area and a floating-point type fixed value entry, and the ASDU type identifier for transmitting the integer value is 0x63, and is collectively composed of n 4 bytes. The type is not declared in the message, the transmission value takes a value from the fixed value table, and the packet is unpacked according to the type in the fixed value table when the packet is unpacked.
table 2 format definition of modified fixed value ASDU
The ASDU _5 packet contains fixed value items such as integer control words, the ASDU type identifier is 0x64, and the ASDU type identifier is composed of n 4 bytes. The 32 control words agree on the combination rules to combine into one 4 byte count.
table 3 format definition of fixed value ASDU
an ASDU _6 is independently set to transmit a switching fixed value area and a solidification fixed value command, the ASDU type mark is 0x65 and consists of 2 bytes with 4 bytes, the upper bit of the first byte represents the switching command, the upper bit represents the target fixed value area, the lower bit represents the target area whether the second byte is solidified or not.
table 4 format definition of the default value area ASDU
After the protection slave machine executes the relevant command of the management host machine, the execution result and the fixed value CRC need to be fed back to the management host machine. Because the execution result and the fixed value CRC data volume are small, the ASDU does not need to be expanded additionally. In the scheme of the invention, the implementation is realized by using a method for starting the spare data bit in the original ASDU _3, and the latter two bytes are defined as an execution result, specifically: two bytes contain 8 data bits, each two data bits representing a result, 10 indicating success and 01 indicating failure. According to the method, 8 data bits just meet the requirements of the states of 'success or failure of setting the editing area, success or failure of modifying the fixed value, success or failure of solidifying the fixed value and success or failure of switching the fixed value area'.
The device according to the invention is in fact a computer solution based on the above method flow, i.e. a software component, which can be run in the protection device. The above-described method will not be described in detail since it is sufficiently clear and complete.
Under the inspiration of the technical idea of the invention, the technical idea of the invention is that under the condition that the element protection operates other submachine fixed values synchronously through the management host under the distributed installation and management of the invention and under the master mode, the technical idea of the invention still falls into the protection scope of the invention for various variants of looped network message framing, data sending and receiving analysis in the fixed value synchronous operation process.
Claims (8)
1. a constant value synchronous operation method for distributed element protection is characterized by comprising a remote synchronous modification method for protecting constant values of all submachine and a remote synchronous switching method for constant value areas of all the submachine;
The method for remotely and synchronously modifying the protection fixed value of each submachine comprises the following steps:
Step 1.1, the management host receives a command of setting a constant value editing area by the client, synchronously forwards the command to other submachine which are normally communicated in the whole set of protection through the protection ring network, replies a confirmation result to the management host after each other submachine sets the constant value editing area, and feeds back the result of whether the constant value editing area is successfully set to the client after the management host summarizes reply information of all the submachine;
Step 1.2, the management host receives a command of modifying the fixed value of the client, synchronously forwards the command to all the submachine which are successfully modified by the fixed value editing area in the whole set of protection through the protection ring network, replies a confirmation result to the management host after the modification of other submachine is finished, and feeds back the result of whether the fixed value is successfully modified or not to the client after the management host summarizes reply information of all the submachine;
step 1.3, the management host receives a command of a client terminal for curing the fixed value, forwards all the submachine with successfully modified set values through the protection ring network, immediately executes and calculates the fixed value CRC after other submachine receive the curing command, then replies the curing result and the CRC to the management host, and feeds back the client terminal to complete the fixed value modification after the management host summarizes the curing result replied by all the submachine;
The method for remotely and synchronously switching the constant value areas of all the submachine comprises the following steps:
Step 2.1, the management host receives a command of switching the constant value area from the client, synchronously forwards the command to other submachine which are normally communicated in the whole set of protection through the protection ring network, and after each other submachine executes the command of switching the constant value area, the management host returns the result of whether the area is successfully switched;
Step 2.2, after the management host receives the results of all other sub-machine district cutting, summarizing an assembly mark to feed back to the client;
In the step 1.1, after receiving the command of the client setting value editing area, the management host scans the communication states of all the submarines in the whole set of protection, determines and memorizes which submarines are normal in communication, adds a label to the command of the setting value editing area, adds the command into an ASDU (application specific data Unit) fixed by a ring network message, and synchronously forwards the command to all the submarines which are normal in communication through the protection ring network; the protection sub-machine immediately executes the command after receiving the command of the set constant value editing area and feeds back an execution result to the management host machine; the management host analyzes the feedback result of the set constant value editing area from the received message data of the submachine, if all the submachines are successfully set, the protection setting editing area is successfully replied to the client, and if any submachine is failed to be set, the protection setting editing area is failed to be replied to the client.
2. The method according to claim 1, wherein in step 1.2, after receiving the command for modifying the fixed value from the client, the management host adds a tag to the command for modifying the fixed value, adds the command to the fixed ASDU of the ring network packet, and synchronously forwards the command to all the slaves that have succeeded in setting the editing area through the protected ring network; the protection sub-machine immediately executes after receiving the fixed value modification command, and feeds back an execution result to the management main machine; and the management host analyzes the feedback result of the modification constant value from the received message data of the submachine, if all the submachines are successfully modified, the protection modification success is replied to the client, and if any submachine is failed to be modified, the protection modification constant value is replied to the client.
3. The fixed value synchronous operation method for distributed element protection according to claim 1, wherein in step 2.1, after receiving the command of switching the fixed value zone from the client, the management host scans the communication states of all the submarines in the whole set of protection, determines and memorizes which submarines are in normal communication, adds a label to the command of switching the zone, adds the command to the ASDU fixed by the ring network message, and synchronously forwards the command to all the submarines in normal communication through the protection ring network; the protection sub-machine immediately executes solidification after receiving the command of modifying the cutting area and calculates a fixed value CRC; and then feeding back the curing result and the CRC to the management host.
4. The fixed value synchronous operation method for distributed element protection according to claim 1, wherein in step 2.2, the management host analyzes a feedback result of the solidified fixed value in the message data of the sub-machines received by the management host, if all the sub-machines are successfully solidified and the CRCs are consistent, the synchronous fixed value modification success is replied to the client, and if any one of the CRCs of the sub-machines is different, the synchronous fixed value modification failure is replied to the client.
5. a constant value synchronous operation device for distributed element protection is characterized by comprising a remote synchronous modification part for protecting each submachine and a remote synchronous switching part for switching each submachine constant value area;
The remote synchronous modification of the protection constant value part of each submachine comprises the following steps:
1) the unit is used for synchronously setting the editing areas of all the submachine, and after the management host forwards a command for setting the constant value editing area to the submachine, the submachine sets the editing areas and feeds back a result to the management host;
2) The unit is used for synchronously modifying the constant value of each sub-machine editing area, and after the management host forwards a command for modifying the constant value to the sub-machines, the sub-machines modify the constant value and feed back the result to the management host;
3) the unit is used for solidifying the constant value of each sub-machine editing area, and after the management host machine forwards a command of solidifying the constant value to the sub-machines, the sub-machines solidify the constant value and feed back the result to the management host machine;
The remote synchronous switching of each submachine constant value area part comprises the following steps:
the system comprises a synchronous switching constant value area unit, a management host forwards a command for switching the constant value area to each submachine, each submachine feeds back a zone switching result and constant value CRC to the management host after switching the constant value area, and the management host summarizes information of all the submachines and then replies the information to a client;
in the unit for synchronously setting the editing areas of the sub-machines, after receiving a command of setting the constant value editing area by a client, the management host scans the communication states of all the sub-machines in the whole set of protection, determines and memorizes which sub-machines are in normal communication, adds a label to the command of setting the constant value editing area, adds the label to an ASDU (application program Unit) fixed by a looped network message, and synchronously forwards the command to all the sub-machines in normal communication through the protection looped network; the protection sub-machine immediately executes the command after receiving the command of the set constant value editing area and feeds back an execution result to the management host machine; the management host analyzes the feedback result of the set constant value editing area from the received message data of the sub machines, if all the sub machines are successfully set, the protection setting editing area is successfully replied to the client, and if any sub machine fails to be set, the protection setting editing area is failed to the client.
6. the constant value synchronous operation device for distributed element protection according to claim 5, wherein in the unit for synchronously modifying the constant values of the edit regions of the sub-machines, the management host receives a command of modifying the constant values from the client, adds a tag to the command of modifying the constant values, adds the command of modifying the constant values to the ASDU fixed by the ring network message, and synchronously forwards the command of modifying the constant values to all the sub-machines successfully arranged in the edit regions through the protected ring network; the protection sub-machine immediately executes after receiving the fixed value modification command, and feeds back an execution result to the management main machine; the management host analyzes the feedback result of the modification constant value from the received sub-machine message data, if all the sub-machines are successfully modified, the protection modification success is replied to the client, and if any sub-machine is failed to be modified, the protection modification constant value is replied to the client.
7. the constant value synchronous operation device for distributed element protection according to claim 5, wherein in the unit for solidifying the constant value of each submachine, after receiving the command of solidifying the constant value from the client, the management host adds a label to the command of solidifying the constant value, adds the command of solidifying the constant value to the ASDU fixed by the ring network message, and synchronously forwards the command of solidifying the constant value to all the submachines with successful fixed value modification through the protection ring network; the protection sub-machine immediately executes solidification after receiving the fixed value modification command, and calculates a fixed value CRC; then feeding back the curing result and CRC to the management host; and the management host analyzes the feedback result of the solidification fixed value from the received sub-machine message data, if all the sub-machines are successfully solidified and the CRCs are consistent, the synchronous modification fixed value is successfully replied to the client, and if any sub-machine CRC is different, the synchronous modification fixed value is failed to reply to the client.
8. The constant value synchronous operation device for distributed element protection according to claim 5, wherein in the synchronous switching constant value area unit, after receiving the command of switching the constant value area from the client, the management host scans the communication states of all the sub-machines in the whole set of protection, determines and memorizes which sub-machines are in normal communication, adds a label to the command of switching the area, adds the command to the ASDU fixed by the ring network message, and synchronously forwards the command to all the sub-machines in normal communication through the protection ring network; the protection sub-machine immediately executes solidification after receiving the command of modifying the cutting area and calculates a fixed value CRC; then feeding back the curing result and CRC to the management host; and the management host computer sends a feedback result of analyzing the curing fixed value in the received sub-computer message data, if all the sub-computers are successfully cured and the CRCs are consistent, the synchronous modification fixed value is successfully replied to the client, and if any sub-computer CRC is different, the synchronous modification fixed value is failed to reply to the client.
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