Monitoring method and system for checking protection setting value

Abstract

The embodiment of the invention provides a monitoring method and system for checking a protection setting value, and the method comprises the steps: master station equipment calls a correct setting value according to the designation of a worker on a work station, generates a first information code through employing a checking algorithm, generates a supervision code according to the checking algorithm, and substation equipment carries out the verification of the protection setting value according to the first information code and the supervision code. And generating a second information code by using a corresponding verification algorithm according to the constant value of the running state in the corresponding protection device, verifying the second information code and the first information code, and then informing the master station equipment of a verification result. According to the embodiment of the invention, the checking task in the specified time and region can be efficiently completed, the manpower, maintenance and overhaul cost is saved, and the management level of power grid equipment is improved. And constant value consistency comparison can be quickly carried out by utilizing a verification algorithm, so that the reliability of data transmission can be effectively improved, man-made interference of data is eliminated, data leakage and cheating are completely eradicated, and unnecessary equipment shutdown and reservice operations are reduced.

Description

Technical Field

[0001] The present disclosure relates to a monitoring and management technology for a substation in an electric power system, and in particular to a monitoring method and system for verifying protection settings. Background Art

[0002] The setting value of the protection device is a set of important power parameters that are used to set and adjust the action value of the protection device located in the substation according to the power system operation mode, equipment parameters, load characteristics, and system stability requirements. It is calculated and issued by the dispatching control center, and the operation and inspection department is responsible for setting and verification. Multi-level setting value verification can ensure the correctness of the power grid protection setting value, thereby ensuring the safe and stable operation of the power system.

[0003] Traditionally, the fixed value verification is done manually, for example, the substation operation and maintenance personnel are sent to the protection device regularly to verify whether the fixed value of the protection device is correct through the protection fixed value list issued by the dispatcher, or the secondary protection personnel are sent to the protection device to verify the fixed value list of the protection device during professional inspections. Since at least two people are required for verification and it takes a long time, at present, substations of 220 kV and below have basically been unmanned. Manual verification of fixed values ​​not only consumes travel time, but also requires at least two people to cooperate in each verification, which will cause a huge waste of human resources.

[0004] One of the more advanced methods in the prior art is to periodically report the protection device operation information including the set value to the main station of the dispatching center through the substation system, and the main station server will select the set value and check it with the set value stored in the main station database. However, this method can only check according to the information regularly reported by the substation system, and the main station server cannot initiate the verification task of the protection device running in the substation at any time.

[0005] Another method is for the main station server to generate a set value form that needs to be checked and send it to the substation system. The substation system manually enters or machine-checks the set values ​​of the protection devices in the station according to the set value form. However, this method cannot eliminate human interference between the substation system and the main station system.

[0006] In addition, both of the above methods face the problem of data transmission reliability. Due to poor data transmission quality and packet loss, the fixed value verification results are often inaccurate or cannot be verified, and data omissions or cheating in the fixed value verification results cannot be avoided. Summary of the invention

[0007] The purpose of the embodiments of the present disclosure is to provide a monitoring method and system for calibrating protection settings with secure and reliable data transmission, accurate calibration results, and a high degree of automation, so as to solve the problems existing in the prior art.

[0008] In order to solve the above technical problems, the embodiments of the present disclosure adopt the following technical solutions:

[0009] One aspect of an embodiment of the present disclosure provides a monitoring method for verifying protection constants, which is applied to a monitoring system, wherein the monitoring system includes a master station device and a substation device, and the method includes: the master station device retrieves first constant value information that needs to be verified according to the staff's designation on the workstation, selects a specific verification algorithm to generate a first information code, and then generates a supervision code according to the verification algorithm, and sends the first information code and the supervision code to the corresponding substation device; the substation device retrieves second constant value information from the corresponding protection device according to the first information code and the supervision code, and then generates a second information code according to the verification algorithm represented by the second constant value information and the supervision code, verifies the second information code with the first information code, and informs the master station device of the verification result.

[0010] In some embodiments, it also includes: the substation device reads the third fixed value information in the protection device, selects a specific verification algorithm to generate a third information code, and after a preset time interval, reads the fourth fixed value information in the protection device, uses the verification algorithm to generate a fourth information code, and verifies the third information code with the fourth information code. If the third information code and the fourth information code are not equal, the main station device is informed.

[0011] In some embodiments, the specific verification algorithm is a CRC algorithm.

[0012] In some embodiments, the communication method between the main station device and the substation device includes: when the substation device responds to the call of the main station device, if there is data to be sent, it sends a message containing a first tag; if not, it sends a message not containing the first tag, and the main station device continues to issue call data commands to the substation device based on the first tag in the message.

[0013] In some embodiments, the command sent by the master station device to the slave station device adopts the ASDU21 format, and the message sent by the slave station device to the master station device adopts the ASDU10 format; the ACD value in the message containing the first tag is 1, and the ACD value in the message not containing the first tag is 0.

[0014] In some embodiments, when the master station device and the substation device begin to communicate, an initialization step is first performed, including: the master station device confirms information in five dimensions of title group, dimension, range, accuracy, and description to the substation device.

[0015] In some embodiments, it includes: the master station device calls the set value to the substation device, the substation device sends the set value in the current protection device to the master station device, and then repeats the steps of the above monitoring method at least twice.

[0016] In some embodiments, the substation device internally communicates using the IEC103 protocol, and the substation device communicates with the main station device using the IEC104 protocol.

[0017] In some embodiments, the substation device communicates with the main station device and the four remote information uploaded by the integrated self-system of the remote control device uses different TCP protocol ports.

[0018] Another aspect of the disclosed embodiment provides a monitoring system for verifying protection constants, including a main station device and a substation device, the main station device having a database, a front-end communication module, a constant value inspection module, and an alarm module; the database is used to store correct constant value information for verification, the front-end communication module is used to communicate with the substation device, the constant value inspection module is used to retrieve the correct constant value information stored in the main station device, and to call, verify, and inspect the constants of the protection devices in each substation device, and the alarm module is used to alarm when the constant value inspection module fails to verify the constants; the substation device has a telecontrol communication module and a protocol conversion module, the telecontrol communication module is used to communicate with the front-end communication module of the main station device, and the protocol conversion module is used to convert the constants in the substation device into protocol-compliant messages that can be sent to the main station device, and the monitoring system can implement the steps of any of the above-mentioned monitoring methods.

[0019] The disclosed embodiment can efficiently complete the verification task within the specified time and area, greatly reduce the manpower required for verification work, reduce the workload of dispatching and control personnel and operation and maintenance personnel, save related maintenance and repair costs, improve the management level of power grid equipment, and has high practicality.

[0020] The verification algorithm can be used to quickly compare the consistency of fixed values, especially the CRC algorithm for verification, which can adapt to the current situation that the protection devices of the existing power grid use binary to save the operating status. It can effectively increase the reliability of data transmission, eliminate human interference in data, prevent data omissions and cheating, and reduce unnecessary equipment decommissioning and recommissioning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the structure of a monitoring system for checking protection setting values ​​according to an embodiment of the present disclosure;

[0023] Figure 2 A structural diagram of a master station device of a monitoring system for checking protection setting values ​​according to an embodiment of the present disclosure;

[0024] Figure 3 A structural diagram illustrating a substation device of a monitoring system for checking protection setting values ​​according to an embodiment of the present disclosure;

[0025] Figure 4 A schematic diagram of the steps of a monitoring method for verifying a protection setting value according to an embodiment of the present disclosure;

[0026] Figure 5 A schematic diagram of the steps of a monitoring method for verifying a protection setting value according to an embodiment of the present disclosure;

[0027] Figure 6 It is a schematic diagram of the sub-steps of communication in the monitoring method for checking the protection setting value according to the embodiment of the present disclosure;

[0028] Figure 7 It is a schematic diagram of the sub-steps of calling basic information in the monitoring method for verifying protection setting values ​​according to an embodiment of the present disclosure;

[0029] Figure 8 It is a schematic diagram of the sub-steps of calling the setting value and setting in the monitoring method for checking the protection setting value in an embodiment of the present disclosure;

[0030] Fig. 9 It is a logical structure diagram of a master station device of a monitoring system for checking protection setting values ​​according to an embodiment of the present disclosure;

[0031] Fig.10 It is a logical structure diagram of a substation device of a monitoring system for checking protection setting values ​​according to an embodiment of the present disclosure;

[0032] Fig.11 It is a logical structure diagram of a master station device of a monitoring system for checking protection constant values ​​in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0034] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0035] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0036] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0037] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0038] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0039] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0040] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0041] A first embodiment of the present disclosure provides a monitoring method for verifying protection settings, which is applicable to a monitoring system for verifying protection settings.

[0042] For ease of explanation, the following first combines Figures 1 to 3 Briefly describe the structure of the monitoring system.

[0043] like Figure 1 As shown, the monitoring system includes: a main station device 1 and multiple substation devices 2, and the main station device 1 communicates with the main station through an IPv4 local area network.

[0044] like Figure 2As shown, the master station device 1 includes a server 11 and a workstation 12, and the server 11 and the workstation 12 communicate through an IPv4 local area network. The master station device is preferably set in an office area far away from the substation, such as a dispatching building. Optionally, the master station device 1 can also be configured and constructed in a scalable manner according to user needs, and the minimum configuration is a single network, single server configuration, in which a single server is used as both a server 11 and a workstation 12, which can also achieve the same technical effect.

[0045] The server 11 at least has a database and a communication server, wherein the database stores the identity information of each substation device and the correct fixed value information that needs to be verified, and the communication server has data writing and storage functions, communication functions, and data processing functions.

[0046] The workstation 12 is provided for use by the staff, so that the staff can interact with the server, and the server can perform actions according to the instructions of the staff.

[0047] like Figure 3 As shown, a single substation device 2 includes a remote control device 21 and multiple protection devices 22. The protection device communicates with the remote control device 21 through a station control network. Figure 1 From the above, the telecontrol device 21 communicates with the master station device 1 via the IPv4 local area network. Each substation device 2 is preferably built in each substation. To save resources, the existing telecontrol communication device installed with the integrated automation system in the substation can be upgraded and used as the telecontrol device 21.

[0048] Figure 4 A monitoring method using the above monitoring system is shown, comprising:

[0049] Step S1: In the main station device 1, according to the staff's designation on the workstation, the first constant value information that needs to be verified is retrieved from the server database.

[0050] In this step, the staff specifies the range to be calibrated through the workstation, and then the server finds the correct set value information of the corresponding substation from its database, that is, the first set value information.

[0051] Specifically, the staff specifies the scope that needs to be verified through the workstation, which means checking the set values ​​of the protection devices in a specific substation and a specific interval in a certain area at a certain time, so that the set values ​​of all related substations within a period of time can be verified, and the set values ​​of the protection devices in certain specific substations and a certain interval at a certain time can be randomly checked. This flexible designation method allows the staff to arrange work according to the actual situation, which is conducive to improving the efficiency of inspection work.

[0052] Step S2: In the master station device 1, according to the first fixed value information, a specific verification algorithm is selected to generate a first information code (S2a), and then a supervision code (S2b) is generated according to the selected verification algorithm, and the first information code and the supervision code are sent to the corresponding substation device 2 (S2c).

[0053] In this step, according to the first fixed value information, a specific verification algorithm is selected to generate the first information code, which means that the first fixed value information is generated into data information of a specific number of bits through a certain computer mathematical operation. Then, a supervision code is generated according to the selected verification algorithm, which means that the master station device 1 can inform the selected verification algorithm information to the slave station device 2 in the form of a supervision code.

[0054] Specifically, the above-mentioned specific check algorithm is preferably a CRC algorithm (cyclic redundancy check algorithm), which is the most commonly used error checking mechanism in data communication. Take it as an example:

[0055] At the master station 1, the information to be checked is first converted into K-bit binary code data, and an R-bit binary supervision code (i.e. CRC code) for verification is generated according to a certain rule, and attached to the above K-bit binary code data to form a new binary code data (K+R) bits in total to be sent out. The slave station 2 can follow the rules represented by the supervision code to perform verification to determine whether there is an error in the transmission process.

[0056] The above rules are called generating polynomials in error control theory. The principle is that any code composed of a binary bit string can be mapped one-to-one to a polynomial whose coefficients are only 0 and 1. We will not go into details here.

[0057] At present, the commonly used CRC checks are CRC-8, CRC-16, and CRC-32, and the corresponding generating polynomials are:

[0058]

[0059] The supervision code is preferably generated by one of the three polynomials mentioned above. Taking the binary number 1011 as an example, its corresponding polynomial is G(x)=x 3 +x+1. If G(x) is the generator polynomial of CRC check, the basic algorithm of supervision code is as follows:

[0060] Convert the generator polynomial G(x) with the highest power of x being R into the corresponding R+1-bit binary number. The sender shifts the binary information code to be sent left by R bits, which is equivalent to the corresponding information polynomial C(x)×2R. Perform modulo 2 division on the binary information code after the left shift and the binary number of the generator polynomial G(x) until the remainder is R bits. The R-bit remainder is directly spliced ​​to the position vacated after the information code is left shifted to obtain a complete CRC code as a supervision code.

[0061] Step S3: In the substation device 2, the first information code and the supervision code are received (S3a), the second constant value information (S3b) is retrieved from the corresponding protection device, and then the second information code (S3c) is generated according to the verification algorithm represented by the second constant value information and the supervision code, and the second information code is verified with the first information code (S3d).

[0062] In this step, the substation device 2 receives the first information code and the supervisory code, and retrieves the second fixed value information from the corresponding protection device, which means that the substation device 2 retrieves the fixed value information in the protection device corresponding to the time, position, and node of the first fixed value information as the second fixed value information according to the command of the main station device 1. Then, the second information code is generated according to the second fixed value information and the verification algorithm represented by the supervisory code, and the second information code is verified with the first information code, that is, the second fixed value information is calculated with the verification algorithm represented by the supervisory code to obtain the second information code, and the first information is verified with the second information code. Only when the two are equal, can it be said that the communication between the main station device 1 and the substation device 2 is normal and the fixed value of the protection device is correct.

[0063] According to the above CRC verification principle, when the generating polynomial G(x) is determined, there is only one supervision code corresponding to it. Therefore, it can not only play the role of leak detection and prevent data packet loss, but also eliminate human interference in the communication between the two and prevent cheating.

[0064] Specifically, taking the example in step 2 as an example, the corresponding polynomial received by the substation device 2 is G(x)=x 3 +x+1 supervision code, and performs a modulo-2 division operation on the second fixed value information. If the remainder is 0, the verification result can be considered correct, otherwise the verification result is wrong.

[0065] Since the static information and status nodes will not change when the protection device is operating normally.

[0066] Step S4: The substation device 2 informs the master station device 1 of the verification result obtained in step S3.

[0067] In this step, if the verification result of step S3 is correct, the substation device 2 responds to the main station device 1 that the verification is successful (S4a), and the main station device 1 informs the staff of the successful verification through the workstation (S4c); if the verification result of step S3 is wrong, the substation device 2 responds to the main station device 1 that the verification is unsuccessful (S4b), and the main station device issues an alarm through the workstation to remind the staff that manual intervention is required (S4d). Optionally, if the verification result of step S3 is wrong, steps S1 to S3 can be re-executed for a specified number of times. After all the verification results are wrong, the substation device 2 responds to the main station device 1 that the verification is unsuccessful.

[0068] The monitoring method for calibrating protection settings provided in the first embodiment of the present disclosure can efficiently complete the calibration tasks within the specified time and area, greatly reduce the manpower required for the calibration work, reduce the workload of dispatching and control personnel and operation and maintenance personnel, save related maintenance and repair costs, improve the management level of power grid equipment, and has high practicality.

[0069] The verification algorithm can be used to quickly compare the consistency of fixed values, especially the CRC algorithm for verification, which can adapt to the current situation that the protection devices of the existing power grid use binary to save the operating status. It can effectively increase the reliability of data transmission, eliminate human interference in data, prevent data omissions and cheating, and reduce unnecessary equipment decommissioning and recommissioning operations.

[0070] The second embodiment of the present disclosure provides a monitoring method, such as Figure 5 As shown, based on the first embodiment, the following inspection steps are also included:

[0071] Step S5: In the substation device 2, the third fixed value information in the protection device is read (S5a), and according to the third fixed value information, a specific verification algorithm is selected to generate a third information code (S5b).

[0072] In this step, reading the third fixed value information in the protection device refers to the fixed value information when the protection device is running; according to the third fixed value information, a specific verification algorithm is selected to generate a third information code, which means that the third fixed value information is generated into data information of a specific number of bits through a certain computer mathematical operation. The principle of this step is the same as that of the above step S2, and it will not be repeated here. It is worth noting that this step and step S2 do not necessarily have to use the same algorithm (polynomial) for calculation.

[0073] Step S6: In the substation device 2, after a specified interval, the fourth fixed value information (S6a) in the protection device is read, and according to the fourth fixed value information, the fourth information code (S6b) is generated using the verification algorithm, and the third information code is verified with the fourth information code.

[0074] In this step, after a specified interval, the fourth fixed value information in the protection device is read, which means that after a specified interval has passed from the reading time in step S5, the fixed value information during the operation of the protection device is extracted as the fourth fixed value information; according to the fourth fixed value information, a specific verification algorithm is selected to generate a fourth information code, which means that the same algorithm (polynomial) as that in step S5 is used for calculation; the third information code and the fourth information code are checked, and if the two are equal, the information code has not changed, and if the two are not equal, the two have changed.

[0075] Since the fixed value information does not change when the protection device is operating normally, the fixed value information can be defined as static information and classified as a state node of the device during the scheme study. Since the static information of the protection device is stored in binary data, the state node can be regarded as a very long binary bit string. According to the above CRC check principle, if the state node is regarded as an information code for CRC check, then when the generating polynomial G(x) is determined, there is a unique CRC check code corresponding to it, so the CRC check code can be used as the unique identifier of the state node to reflect the current state of the state node in real time.

[0076] When the device operates normally, the static information will not change, the status node will not change, the CRC check code will not change, and the third information code and the fourth information code should be equal. Otherwise, a change has occurred, indicating that an abnormality has occurred in the operation of the protection device.

[0077] Step S7: In the slave station device 2, when the third information code and the fourth information code are not equal, the master station device 1 is informed.

[0078] In this step, when the third information code and the fourth information code are not equal, the substation device 2 informs the main station device 1 that the inspection is abnormal and the verification is unsuccessful (S7a), and the main station device 1 sends an alarm to the staff through the workstation (S7b), reminding the staff to manually intervene in the situation.

[0079] The disclosed embodiment enables the substation device 2 to monitor the constants during its own operation in real time even without the active command of the main station device, and can promptly discover abnormal situations in which its constants change, and actively report the abnormalities to the main station device 1, which can further save the verification workload of the main station device and staff, and can also provide an important basis for the maintenance of the equipment.

[0080] The monitoring method provided by the third embodiment of the present disclosure is as follows: when the master station device 1 and the slave station device 2 communicate, Figure 6 As shown, it includes the following sub-steps:

[0081] Sub-step S101: the master station device 1 sends a call command to the slave station device 2;

[0082] Sub-step S102: the slave station device 2 sends a response message including a first tag to the master station device 1 according to the call command;

[0083] Sub-step S103: the master station device 1 determines whether it contains the first tag;

[0084] Sub-step S104: the master station device 1 sends a call data command to the slave station device 2 according to the first tag;

[0085] Sub-step S105: The slave station device 2 checks whether all the data required by the master station device 1 have been sent. If not, execute sub-step S106; if yes, execute sub-step S107;

[0086] Sub-step S106: the slave station device 2 adds the first tag to the data required in the call data command to form a message and sends it to the master station device 1;

[0087] Sub-step S107: the slave station device 2 sends a message not including the first tag to the master station device 1;

[0088] Sub-step S108: the master station device 1 determines whether the received message contains the first tag, and if so, returns to sub-step S104; if not, ends the communication.

[0089] Furthermore, the command sent by the master station device 1 to the slave station device 2 adopts the ASDU21 format, and the message sent by the slave station device 2 to the master station device 1 adopts the ASDU10 format.

[0090] Furthermore, the inclusion of the first tag in the above sub-step means that the ACD is set to 1 in the message sent by the sub-station device 2 to the main station device 1, and vice versa, not including the first tag means that the ACD is set to 0. The above ACD is the request access bit specified in the IEC104 protocol, and when the value is 1, it means that the terminal wishes to transmit primary data to the main station.

[0091] That is to say, after receiving the call command from the master device 1, the substation device 2 confirms it and sets ACD to 1, notifying the master device 1 that the substation device 2 has level 1 data ready to be sent. After the master device 1 sends a command to receive data to the substation device 2, the substation device 2 receives the command and uploads the data to the master device 1. If the ACD in the message of the substation device 2 is still 1, it means that there is still data to be uploaded to the master device 1, and the data upload needs to continue; finally, the data upload of the substation device 2 is completed, and the fixed value call process is completed. In this way, the data transmitted from the substation device 2 to the master device can be ensured to be complete.

[0092] Furthermore, the master station device 1 needs to check the setting value of the substation device 2 as follows: Figure 7As shown, the three general steps of calling the set value, downloading the set value, and solidifying the set value are performed. The substation device 2 needs to set the set value accordingly, verify that the set value is correct, and verify that the set value is correct again.

[0093] The above-mentioned call set value-corresponding set value means that the master station device requires the slave station device to send the currently running set value data to the master station device. The slave station sends the currently running set value data as required, and the master station can retain the data for future manual verification.

[0094] The above-mentioned fixed value downloading and verifying that the fixed value is correct refers to the process of verifying according to the first embodiment.

[0095] The above-mentioned solidification of fixed values ​​- re-verification of the correctness of fixed values ​​refers to the process of re-verifying according to the first embodiment.

[0096] That is to say, it is preferred to call the fixed value data first, and the main station first compares whether the fixed value is correct, and then performs two verifications using the CRC verification algorithm in the first embodiment, which can comprehensively inspect and verify the main way to find problems and eliminate interference and human interference to the verification results caused by communication problems.

[0097] For example, if the call set value verification fails, but the CRC verification algorithm succeeds twice, it means that the call set value verification may fail due to communication interference, and it is only necessary to recheck after a period of time; if the fixed value call is successful, but the CRC verification algorithm fails twice, it means that it may be subject to human interference, and personnel need to be sent to the site for verification.

[0098] Furthermore, before the master station device 1 checks the fixed value of the substation device 2, it needs to go through the following steps: Figure 8 The initialization steps shown are that the master station device 1 confirms the information of the five dimensions of title group, dimension, range, accuracy and description to the slave station device 2 so that the master station device 1 can confirm the identity of the slave station device 2.

[0099] Take the call and response of the group title as an example: the master station uses the ASDU21 message to send a read group title command to the slave station, and the slave station uses the ASDU10 message to respond to the read command to the master station.

[0100] The reading and response of other information are similar to this, and will not be described here one by one. It should be pointed out that the reading order of various information is freely defined by the master station and is not fixed.

[0101] The embodiments of the present disclosure are suitable for upgrading and renovating master stations and substations in existing power systems, and can use the monitoring method provided by the present disclosure without changing the structure of the existing power system from the perspective of saving costs as much as possible.

[0102] The fourth embodiment of the present disclosure provides a monitoring system for checking protection settings, which is used to execute the monitoring methods in the first three embodiments. Fig. 9 , 10 As shown, the monitoring system includes a master station device 1 and a substation device 2, wherein:

[0103] See also Fig. 9 The main station device 1 includes a server 11 and a workstation 12. Specifically, the workstation 11 is provided with an integrated console module 114, the server 11 is provided with a database 120 and a communication server end 110, and the communication server end 110 is provided with a database editing module 112, a fixed value inspection module 111, an alarm module 113, and a front communication module 118.

[0104] See also Fig. 9 The integrated console module 114 is used to realize human-computer interaction. Specifically, the integrated console module 114 should be connected to a display device and an input device for the staff to view and input information. Preferably, the integrated console module 114 has a search function, that is, when there is a special inspection task, the operator can search for a specific protection device, and cooperate with the fixed value inspection module 111 to call and query the specific fixed value of the protection device, the soft and hard pressure plate status, etc.

[0105] See also Fig. 9 The database 120 is used to store the identity information, correct setting information, and event records of each substation device 2 and each protection device 22. Preferably, the above event records should be detailed to the specific personnel, time, workstation used, name of the interval, reviewer, etc. Detailed event records can be used for inspection and playback after an accident occurs and for the whole process management of setting values ​​for specific equipment.

[0106] See also Fig. 9 , the database editing module 112 is used to retrieve and modify the correct fixed value information and identity information in the database according to the instructions of the integrated control console module 114 and the fixed value inspection module 111. Specifically, the database editing module 112 can realize the input and output of the identity information of each substation equipment 2 and each protection device 22. The database editing module 112 can import the fixed value data in the database of the specified format into the newly created fixed value library, and then the system generates a fixed value list for fixed value inspection and verification; when it is necessary to modify the fixed value, the database editing module 112 can directly import the data into the fixed value list, and then enter the data into the library according to the correct fixed value list, which simplifies the operation of the operating personnel, reduces the workload, improves the work efficiency of the personnel, and reduces the risk of misoperation caused by repeated data input. In addition, the database editing module 112 writes each event record of modification and calling of fixed values ​​in the system to the database, which is convenient for the subsequent operation and maintenance work.

[0107] See also Fig. 9 The fixed value inspection module 111 is used to retrieve the correct fixed value stored in the master station device 1, and call, check, and inspect the fixed value of the protection device in each substation device 2. Specifically, it is used to generate a first information code and a supervision code for checking the fixed value of the protection device according to the instruction of the integrated control console module 114, and to process the verification result sent by the substation device 2. Specifically, the fixed value inspection module 111 can call, check, and inspect the fixed value of each protection device according to the monitoring method shown in the first to third embodiments, and can instruct the fixed value inspection alarm module to issue an alarm when the verification of the monitoring substation device 2 is unsuccessful or the communication condition is poor, so as to remind personnel to manually intervene in abnormal conditions. Preferably, the fixed value inspection module 111 has a ledger function, that is, centralized management of relevant information of the protection device and relevant information stored in the database, and the above-mentioned relevant information includes the model, manufacturer, fixed value, pressure plate status and collation record of related events of the protection device.

[0108] See also Fig. 9 , the alarm module 113 is used to send an alarm message to the integrated control console module 114 when the fixed value inspection module 111 receives information that the verification is unsuccessful, so that the integrated control console module 114 can issue an alarm. Specifically, when the alarm information is generated, the fixed value inspection alarm module transmits the alarm information to the corresponding workstation to remind the relevant staff to check and handle it in time. Preferably, the reminder method adopts an audible and visual alarm mode, that is, the alarm information can be in the form of a light sign, such an alarm is more direct and eye-catching. The first level of information is displayed as a specific substation name, that is, the substation name. The second level of display information is the protection device of the specific interval of the substation. The third level displays a specific list of items. The three-level information display can locate the specific protection device in detail, which helps maintenance personnel to handle it in time.

[0109] See also Fig. 9 , the front-end communication module 118 is used to communicate with the substation device 2. Specifically, in order to convert the private network command set used by each background application module of the main station with the standard protection protocol used on the data network, and provide a complete protection comprehensive application function service for the background application module, it is necessary to design a front-end communication module at the main station. It is a bridge hub for the communication between the background application module of the main station system and the station-side microcomputer protection device. In addition to the basic function of protocol parsing, the module also needs to have the function of real-time information monitoring of the link, real-time monitoring and analysis of network application data packets, and support auxiliary functions such as online modification of communication parameters. In order to save costs, the front-end communication module can be run on the database server. Preferably, in order to meet the requirements of front-end communication, at least two high-performance network cards are required to be configured on the server.

[0110] Furthermore, the design and development of the master station is carried out under the premise of the current great development of computer software and hardware technology. The design of the system is based on the cross-platform design of the internal exchange bus, adopting the modular design concept and distributed layout method. The various functional modules of the system can be freely configured according to the needs of the workstations at all levels on the entire network. The system takes into account the user-friendly operation interface of the later operators and is developed based on the Windows platform.

[0111] See also Fig.10 The substation equipment 2 includes a telecontrol communication module 211 , a telecontrol information processing module 212 , a protocol conversion module 213 , an integrated automatic system module 214 , and a plurality of protection devices 22 communicating with the integrated automatic system module 214 .

[0112] See also Fig.10 , the telecontrol communication module 211 is used to communicate with the front-end communication module 118 of the master station device 1. Specifically, the telecontrol communication module 211 and the front-end communication module 118 of the master station device 1 adopt the IEC104 of the microcomputer protection application, which has the advantage that the protocol clearly defines the rules for sending telemetry, telesignaling, remote control, and remote adjustment information, and the alarm and action information of the relevant protection device can also be sent as telesignaling information. Preferably, a TCP protocol port (such as port 2405) different from the 2404 port used by the integrated self-system installed in the telecontrol device in the original power system to upload the four remote information is used for communication. In this way, the IEC104 protocol process for transmitting the four remote information in the original power system and the IEC104 protocol process of the microcomputer protection application can run on the same hardware platform without interfering with each other.

[0113] See also Fig.10 The remote control information processing module 212 is used to respond to and process the master station device 1 calling, verifying, and inspecting the set values ​​of each protection device according to the monitoring method shown in the first to third embodiments, and can generate information to notify the master station device 1 that the verification is unsuccessful, and send the information to the master station device 1 through the remote control communication module 211.

[0114] See also Fig.10, the protocol conversion module 213 is used to convert the protocol of the internal communication of the substation device 2 into the protocol of the communication with the main station device 1. Since the general service provided by the IEC103 protocol can self-describe the relevant information, and the protection device also needs to apply the general classification service when modifying the setting value, that is to say, it is very convenient to use the general classification service to transmit the relevant protection information. Only the protection reset command adopts the conventional and strictly specified application service data unit. Therefore, it is preferred to use the general classification service of the IEC103 protocol in the internal communication of the substation device 2. The general query of data generally uses the data unit of the ASDU21 type, and the ASDU10 is generally used to respond after the general query command is issued. Therefore, in this system, the configuration information, setting value and other information of the reading device sent by the main station device to the substation device all use the ASDU21 message, the response message uploaded by the substation all uses the ASDU10, and the operation of modifying the setting value sent by the main station also uses the ASDU10; the protection signal reset uses the ASDU20.

[0115] See also Fig.10 The integrated system module 214 is used to monitor the operating status of each protection device and regularly obtain the operating information of each protection device.

[0116] That is to say, since the mainstream communication protocol in a large number of traditional substation integrated automation systems of power grid companies currently adopts the IEC103 protocol, and the data telecontrol network protocol adopts the power industry standard IEC104 protocol, the application of this system protocol adopts the form of IEC103 protocol plus IEC104 protocol, that is, it can realize the information exchange between the main station equipment and the substation equipment of the system while saving the transformation cost as much as possible.

[0117] A fifth embodiment of the present disclosure provides a monitoring system, such as Fig.11 As shown, the communication server end 110 in the master station device 1 has a three-layer architecture, including: a logic processing layer 110a, an input and output layer 110b, and an input information processing layer 110c.

[0118] Specifically, the integrated console module 114 and the database 120 of the workstation 12 can complete data interaction with the communication server end 110 through the input processing module 116, the output processing module 117 and the data storage module 115 set in the input and output layer 110b; the data editing module 112, the fixed value inspection module 111, and the alarm module 113 in the logic processing layer 110a perform logical processing on the data according to the monitoring methods described in the first to third embodiments; then the processed results are handed over to the input and output layer 110b to feed back to the database and the workstation 12, and the data that needs to communicate with the substation device 2 is modified by the front communication processing module 118 of the input information processing layer 110c to the appropriate protocol for sending and receiving.

[0119] To sum up, the monitoring method and system for calibrating protection settings disclosed in the present invention can efficiently complete the calibration tasks within the specified time and area, greatly reduce the manpower required for the calibration work, reduce the workload of dispatching and control personnel and operation and maintenance personnel, save related maintenance and repair costs, and improve the management level of power grid equipment, and has high practicality.

[0120] The embodiments of the present disclosure utilize a verification algorithm to quickly perform a constant value consistency comparison, especially a CRC algorithm for verification, which can adapt to the current situation in which protection devices in existing power grids use binary to save operating status, can effectively increase the reliability of data transmission, eliminate human interference in data, prevent data omissions and cheating, and reduce unnecessary equipment decommissioning and recommissioning operations.

[0121] The storage medium may be included in the electronic device, or may exist independently without being installed in the electronic device.

[0122] The storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: obtains at least two Internet Protocol addresses; sends a node evaluation request including at least two Internet Protocol addresses to a node evaluation device, wherein the node evaluation device selects an Internet Protocol address from the at least two Internet Protocol addresses and returns it; receives the Internet Protocol address returned by the node evaluation device; wherein the obtained Internet Protocol address indicates an edge node in a content distribution network.

[0123] Alternatively, the storage medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device: receives a node evaluation request including at least two Internet Protocol addresses; selects an Internet Protocol address from the at least two Internet Protocol addresses; and returns the selected Internet Protocol address; wherein the received Internet Protocol address indicates an edge node in a content distribution network.

[0124] Computer program code for performing operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including, but not limited to, object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the passenger computer, partially on the passenger computer, as a separate software package, partially on the passenger computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the passenger computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0125] It should be noted that the storage medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with a command execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any storage medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with a command execution system, apparatus or device. The program code contained on the storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0126] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable commands for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer commands.

[0127] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0128] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0129] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with a command execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0130] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0131] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0132] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0133] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection required by the present disclosure.

Claims

1. A monitoring method for verifying protection settings, characterized in that: Applied to a monitoring system, the monitoring system includes a master station device and a substation device, and the method includes: The master station device (1) retrieves the first fixed value information to be verified according to the designation of the staff on the workstation, selects a specific verification algorithm to generate a first information code, then generates a supervision code according to the verification algorithm, and sends the first information code and the supervision code to the corresponding slave station device (2). The substation device (2) retrieves second constant value information from the corresponding protection device according to the first information code and the supervision code, generates a second information code according to the second constant value information and the verification algorithm represented by the supervision code, verifies the second information code with the first information code, and informs the main station device (1) of the verification result.

2. The monitoring method for verifying protection setting values ​​according to claim 1, characterized in that: Also includes: The substation device (2) reads the third fixed value information in the protection device, selects a specific verification algorithm to generate a third information code, reads the fourth fixed value information in the protection device after a preset time interval, uses the verification algorithm to generate a fourth information code, and verifies the third information code with the fourth information code. If the third information code and the fourth information code are not equal, the main station device (1) is informed.

3. The monitoring method for verifying protection setting values ​​according to claim 2 is characterized in that: The specific verification algorithm is a CRC algorithm.

4. The monitoring method for verifying protection setting values ​​according to claim 3 is characterized in that: The communication method between the master station device (1) and the slave station device (2) includes: When the slave station device (2) responds to the call of the master station device (1), if there is data to be sent, it sends a message containing the first tag; if not, it sends a message without the first tag. The master station device (1) continues to send a command to summon data to the slave station device (2) according to the first tag in the message.

5. The monitoring method for verifying protection setting values ​​according to claim 4 is characterized in that: The command sent by the master station device (1) to the slave station device (2) adopts the ASDU21 format, and the message sent by the slave station device (2) to the master station device (1) adopts the ASDU10 format; the ACD value in the message containing the first tag is 1, and the ACD value in the message not containing the first tag is 0.

6. The monitoring method for verifying protection setting values ​​according to claim 3 is characterized in that: When the master station device (1) and the slave station device (2) start communicating, they first perform an initialization step, including: The master station device (1) confirms information in five dimensions, namely, title group, dimension, range, accuracy and description, to the slave station device (2).

7. The monitoring method for verifying protection setting values ​​according to claim 1, characterized in that: include: The master station device (1) calls for a set value from the substation device (2), and the substation device (2) sends the set value in the current protection device to the master station device (1), and then repeats the steps of the monitoring method described in claim (1) at least twice.

8. The monitoring method for verifying protection setting values ​​according to claim 5, characterized in that: The substation device (2) internally communicates using the IEC103 protocol, and the substation device (2) communicates with the main station device (1) using the IEC104 protocol.

9. The monitoring method for verifying protection setting values ​​according to claim 8, characterized in that: The substation equipment (2) communicates with the main station equipment (1) and the four remote information uploaded by the integrated self-system of the remote control device using different TCP protocol ports.

10. A monitoring system for verifying protection settings, characterized in that: It includes a master station device (1) and a slave station device (2). The master station device (1) comprises a database (120), a front-end communication module (118), a fixed value inspection module (111), and an alarm module (113). The database (120) is used to store correct set value information for calibration. The front-end communication module (118) is used to communicate with the substation device (2). The fixed value inspection module (111) is used to retrieve the correct fixed value information stored in the master station device (1), and to call, check and inspect the fixed values ​​of the protection devices in each substation device (2). The alarm module (113) is used to give an alarm when the fixed value inspection module (111) fails to verify the fixed value; The substation device (2) comprises a telecontrol communication module (211) and a protocol conversion module (213). The telecontrol communication module (211) is used to communicate with the front-end communication module (118) of the master station device (1). The protocol conversion module (213) is used to convert the fixed value in the substation device (2) into a message that complies with the protocol and can be sent to the main station device (1). The monitoring system can implement the steps of the monitoring method according to any one of claims 1 to 9.

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