Equipment model acquisition method and system of information protection substation

Abstract

The invention belongs to the field of model acquisition, and particularly relates to an equipment model acquisition method and system of a signal protection substation. The method comprises the following steps that: the information protection substation detects equipment in the same network segment as the substation according to a network address of the information protection substation, and performs a link test for detecting whether the equipment has link capability with the substation or not and a protocol test for detecting whether a protocol used by the equipment exists in a protocol library of the substation or not on the detected equipment; and the secondary equipment passing the two tests is accessed to the substation, and the equipment model of the accessed equipment is received at the substation, so that the acquisition of the equipment model is completed. According to the method, the secondary equipment needing to be accessed in the substation can be positioned through reliable triple screening, so that the substation can accurately find the correct secondary equipment needing to be accessed, and the model acquisition of the secondary equipment is accurately realized.

Description

Technical Field

[0001] The present invention belongs to the field of operation and maintenance of secondary equipment models, and particularly relates to a method and system for collecting equipment models of a protection information substation. Background Art

[0002] The relay protection fault information substation is a hardware and software system installed at the substation end of the power system, communicating with devices such as relay protection devices, fault recorders, automatic safety devices, measurement and control devices, and traveling wave distance measuring devices to complete protocol conversion, information collection and storage, and information interaction with the relay protection fault information master station.

[0003] When a new secondary device needs to be connected to the relay protection fault information substation, it is necessary to first search for the secondary device to be connected to the substation to collect its secondary device model. The published text of the Chinese patent application with the application publication number CN118842848A discloses a method for the relay protection fault information substation to be configuration-free and maintenance-free. This method is based on all substation network topologies (including network information of already connected secondary devices and secondary devices to be connected) maintained at the master station end, and the in-station network nodes currently connected to the substation. By comparing the two, the network information of the secondary device to be connected is obtained; then, by searching the routing information of all substations (including existing and new substations) and the network information of the secondary device to be connected and comparing the two, the secondary device that should be connected to the substation is matched, that is, based on all network node information already mastered by the user dispatching end (master station end), the secondary device that should be connected to the substation is found through simple comparison.

[0004] However, since the substation only retains the communication with the outside world through the dispatching data network port, the internal protection information network environment is basically in an isolated state, and the parameters in most network environments can be customized to a certain extent, such as the IP addresses of the internal secondary equipment. In actual operation, due to this isolated state, the substations in different substations cannot perform data interaction. Therefore, it may lead to the situation where the internal routing information of the substations in different substations is the same. That is, since the internal routing information between different substations is isolated from each other, the IP addresses of the secondary equipment in different substations (this IP address is used to connect to the substation to which the secondary equipment to be accessed belongs, and this substation and the secondary equipment to be accessed are in the same network segment) may be repeated (i.e., the IP addresses are the same). In this case, the IP address of the secondary equipment and the IP address of the secondary equipment stored in the substation for connection are not necessarily in one-to-one correspondence (i.e., there may be a one-to-many situation. In this case, the substation in a certain substation may wrongly locate the secondary equipment in another substation that should not be connected to itself through the stored IP address of a certain secondary equipment), which may further lead to great uncertainty in the actual operation of finding the secondary equipment using the method proposed in the above published text (i.e., there may be connection errors or connection failures), making it difficult to accurately find the secondary equipment to be accessed in the substation, thus affecting the accuracy and success rate of the equipment model collection of the protection information substation. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and system for collecting the equipment model of a protection information substation, which is used to solve the problem in the prior art that due to the inability of the substations in different substations to perform data interaction, it is difficult to accurately find the secondary equipment to be accessed in the substation, thus affecting the accuracy and success rate of the equipment model collection of the protection information substation.

[0006] In order to achieve the above purpose, the present invention provides a method for collecting the equipment model of a protection information substation, and the method includes:

[0007] The protection information substation detects the devices in the same network segment as the substation according to its own network address, performs a link test on the detected devices to detect whether the devices have the link ability with the substation and a protocol test to detect whether the protocol used by the devices exists in the protocol library of the substation, connects the devices that pass these two tests to the substation and performs a receiving operation on the device model of the connected devices in the substation to complete the collection of the device model.

[0008] Beneficial effects: The present invention provides a brand-new method for collecting device models of a protection and control substation. This method is equivalent to triple screening of devices. The first screening method is that the substation detects devices in the same network segment based on its own network address. This step can screen out devices within the substation network (usually only secondary devices are assigned IP addresses, so that the device can be set to be in the same network segment as the substation through the IP address, and then the substation can detect the device based on its own network address; devices without network addresses and devices with network addresses not in the same network segment as the substation are basically unlikely to be secondary devices to be connected to the substation). The second screening method is link testing. If the device passes this link test, it means that the device has the ability to link to the substation port. Finally, the third screening is used to determine the device to be connected. The third screening method is to screen out devices whose used protocol exists in the substation protocol library through the set protocol test. The underlying logic of this protocol test is to test whether the protocol used by the device with the ability to link to the substation port exists in the protocol library inside the substation; if the device passes this protocol test, it means that the device not only has the ability to link to the substation port, but also the protocol it uses is in the substation protocol library (that is, while being able to achieve basic linking, it can also perform protocol communication). If the device passes the above triple screening, it can be connected to the substation (that is, it is determined that the identity of the device is indeed a device to be connected to the substation, and an access operation is performed on it) to collect the device model. In summary, through this method, in the case of relatively isolated networks in the substation, it can effectively avoid the situation where when the dispatching master station analyzes and matches the devices belonging to a certain substation through the substation IP and device IP, the substation makes a wrong connection or connection failure with the device due to the same IP of the device, because even if the IP of the device is the same, and the networks of different substations are isolated from each other, the subsequent reasonable and reliable triple screening (mainly the first screening) will only locate the devices to be connected within the station, enabling the substation to accurately find the correct devices that should be connected to itself. Thus, the collection of device models can be accurately achieved.

[0009] Further, the link testing includes: using a database that pre-stores the ports of secondary devices used in the current power system and the link method information corresponding to the ports, and linking according to the link method information in the database with the ports of the detected secondary devices. If there is link method information in the database that enables successful linking, it is determined that the device passes the link test.

[0010] Further, the protocol testing includes: using a protocol library that pre-stores the protocols used by the secondary devices that have been determined to need to be connected to the substation, and performing corresponding protocol communication on the devices that have passed the link test according to the protocols in the protocol library; if there is a protocol in the protocol library that enables successful corresponding protocol communication, it is determined that the device passes the protocol test.

[0011] Further, the network address of the substation itself is obtained based on the IP address and mask of the substation itself.

[0012] Further, the method for the substation to detect devices in the same network segment as the substation based on its own network address includes:

[0013] The substation uses the protocol in the TCP protocol stack within the substation to detect according to its own network address, and takes the devices with the same network address as the substation itself detected as the devices detected in the same network segment as the substation.

[0014] Further, the method for the substation to receive the device model of the access device includes:

[0015] The substation receives the device model of the access device according to the protocol used by the access device, and performs model mapping on the received device model to convert the received device model into a unified model.

[0016] Further, the method for the substation to receive the device model of the access device according to the protocol used by the device includes:

[0017] If the protocol used by the access device is the IEC61850 protocol, the device model of the access device is directly received by downloading the CID file of the access device to download the model of the preset data points in the access device.

[0018] If the protocol used by the access device is the IEC60870-5-103 and its variant protocols, the model of the data points in the access device is summoned through the general classification service or the model calling method set according to the protocol used by it, so as to receive the device model of the access device.

[0019] Further, the method for performing model mapping on the received model to convert the received device model into a unified model is: performing model mapping on the received model through the substation configuration description language to convert it into a unified and generally recognizable model of the device model.

[0020] Further, the method for connecting the devices that pass these two tests to the substation includes: the substation establishes a communication connection with the devices that pass the link test and protocol test through the collector set inside it to connect to the devices.

[0021] The present invention also provides a device model acquisition system for a protection and control substation, including a processor, and the processor is used to execute a computer program to implement the steps of the above-mentioned device model acquisition method for the protection and control substation.

[0022] The device model acquisition system for the protection and control substation can achieve the same beneficial effects as the above-mentioned device model acquisition method for the protection and control substation. Description of the Drawings

[0023] Figure 1 It is a flow example diagram of the device model acquisition method of the protection and control substation in the embodiment of the device model acquisition method of the protection and control substation of the present invention;

[0024] Figure 2 It is an example diagram of the application of the device model acquisition method of the protection and control substation in the embodiment of the device model acquisition method of the protection and control substation of the present invention to the substation system and the main station system architecture. Detailed Embodiment

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments.

[0026] Embodiment of the Device Model Acquisition Method of the Protection and Control Substation

[0027] This embodiment provides a technical solution for the device model acquisition method of the protection and control substation. The underlying logic of this method is that the protection and control substation eliminates the secondary devices of other substations that are mis-located due to the same IP addresses of different secondary devices through triple screening, so as to achieve the correct acquisition of the device model. The first screening is that the substation detects the secondary devices in the same network segment as itself according to its own network address, that is, the substation uses the protocol in the TCP protocol stack in the substation (ICMP protocol is used in this embodiment, and other protocols in the TCP protocol stack, such as TCP or UDP protocol, can also be used in other embodiments), and detects the secondary devices in the same network segment as the substation according to the network address of the substation itself. As Figure 1 shown, this method specifically includes triple screening, and the screening process is as follows:

[0028] The method of the first screening includes: the protection and control substation detects the devices in the same network segment as the substation according to its own network address (the devices include primary devices, secondary devices, etc.; the primary device refers to the device that directly produces, transports, distributes and uses electric energy; the secondary device refers to the low-voltage electrical device required to monitor, control, adjust, protect the operation of the primary device and provide the operation condition or production command signal for the operation and maintenance personnel. Usually, only the secondary device has the communication ability and will be assigned an IP address), where the network address of the protection and control substation itself is obtained according to the IP address and mask of the substation itself. In other embodiments, it can also be obtained by other existing methods, such as directly reading the pre-stored network address of the protection and control substation itself, etc.; the detected device is the secondary device that is in the same network segment as the substation and indeed belongs to the substation;

[0029] After obtaining the results of the first-round screening (i.e., after obtaining the detected devices in the same network segment as the substation), link tests and protocol tests are performed on the detected devices, which are the second-round screening and the third-round screening; through the second-round screening and the third-round screening, devices that are only in the same network segment as the substation but cannot communicate with the substation for data interaction can be excluded, and the devices that pass these two tests are connected to the substation (this connection method is: the substation establishes a communication connection with the devices that pass the link test and protocol test through the collector set inside it to connect the above devices) and the substation performs a receiving operation on the device models of the connected devices to complete the acquisition of the device models. In fact, the devices that can be linked to the substation are all secondary devices.

[0030] The method of the second-round screening (i.e., the link test) includes: using a database that pre-stores the ports of secondary devices used in the current power system and the link method information corresponding to the ports, and linking according to the link method information in the database with the ports of the detected secondary devices. If there is link method information in the database that enables the link to succeed, it is determined that the device passes the link test. This link test is actually a process of excluding secondary devices that do not have the ability to link to the substation and retaining secondary devices that have this ability. Therefore, among the secondary devices retained after this link test, there are still the following two types of secondary devices:

[0031] ① Secondary devices that have the ability to link to the substation and can communicate with the substation;

[0032] ② Secondary devices that have the ability to link to the substation but cannot communicate with the substation.

[0033] The differences between the secondary devices corresponding to ① and ② are: for the secondary devices corresponding to ①, the protocol they use belongs to one of the protocol libraries inside the substation, that is, the substation can also perform protocol communication with them using the protocols used by this part of the secondary devices; while for the secondary devices corresponding to ②, the protocol they use does not belong to any of the protocol libraries inside the substation, that is, the substation cannot find a protocol in the internal protocol library to communicate with them in protocol. Therefore, the substation can only complete the link with this part of the secondary devices but cannot communicate normally.

[0034] Thus, the protocol test (i.e., the third-round screening) in this embodiment is a screening of secondary devices based on whether they have the ability to perform protocol communication with the substation.

[0035] The method of the third-round screening includes: using a protocol library that pre-stores the protocols used by the determined secondary devices that need to be connected to the substation, and performing corresponding protocol communication on the devices that pass the link test according to the protocols in the protocol library; if there is a protocol in the protocol library that enables the corresponding protocol communication to succeed, it is determined that the device passes this protocol test.

[0036] After the conformance test, the secondary devices corresponding to ② (i.e., secondary devices that have the ability to link with the substation but cannot communicate with the substation) can be excluded. Therefore, after the above three - fold screening, the finally retained secondary devices are guaranteed to have the following three characteristics:

[0037] Characteristic 1: Being in the same network segment as the substation;

[0038] Characteristic 2: Having the ability to link with the substation;

[0039] Characteristic 3: Being able to perform conformance communication with the substation.

[0040] If a secondary device has the above three characteristics, that is, the secondary device can first be detected by the substation because it is in the same network segment as the substation, and the secondary device can successfully link with the substation and achieve normal communication, then it can be determined that the secondary device is the secondary device to be connected to the substation, and it is connected to the substation. And the substation performs a receiving operation on the device model of the secondary device that has been connected to itself to complete the acquisition of the device model. By adopting the method provided in this embodiment, after detecting secondary devices with the same network segment, two more screenings are carried out on them; since the secondary devices of other substations must not be able to simultaneously have the ability to link with this substation and the ability to perform conformance communication with this substation, these two screenings can completely exclude the secondary devices belonging to other substations; thus, it can effectively avoid the situation that the substation wrongly locates the secondary devices in another substation that should not be connected to itself just because the network segment happens to be the same as that of the substation, so as to achieve the purpose of successfully and accurately collecting the device model through the substation.

[0041] In summary, the first - fold screening first filters out the secondary devices with inconsistent network segments with the substation. The second - fold screening is that the substation conducts a link test on the above - mentioned secondary devices with the same network segment as it to screen out the secondary devices with the ability to link with the substation ports; the way of this link test is: try to link the secondary devices according to the ports and the corresponding link - mode information stored in the database (this database is used to store the ports of the secondary devices used in the current power system and the link - mode information corresponding to the ports), and determine the secondary devices that can be successfully linked as the secondary devices passing this link test; this screening then filters out the secondary devices that do not have the ability to link with the substation; only the secondary devices passing the link test can enter the third - fold screening, that is, the conformance test; the way of this conformance test is: try to perform the corresponding conformance communication on the secondary devices according to the conformance stored in the conformance library (this conformance library is used to store the conformance of the secondary devices that have been determined to need to be connected to the substation), and determine the secondary devices that can achieve conformance communication as the secondary devices passing this conformance test. When the secondary device passes the above three - fold screening, it can be connected to the substation and the device model can be collected.

[0042] As Figure 2 shown, in this embodiment, the method for the slave station to receive the device model of the access device (i.e., the content included in "Protocol Processing 1-N" in Figure 2 ) includes:

[0043] After the collection of the device model is completed, the slave station receives the device model of the access device according to the protocol used by the access device, and maps the received device model to convert the received device model into a unified model. The conversion method is: mapping the received model through the substation configuration description language to convert the device model into a unified and generally recognizable model.

[0044] Specifically, taking the IEC61850 protocol used by the access device as an example, in this case, the slave station receives the device model of the access device according to the IEC61850 protocol and maps the received device model; since this model is compatible with the IEC61850 protocol and the 103 and its variant protocols, a platform for unified model processing of devices accessed according to different protocols needs to be provided (that is, in addition to the access device using the IEC61850 protocol, a platform for unified model processing of the device models of other devices using the 103 and its variant protocols also needs to be provided). The method adopted in this embodiment is to convert these models into a unified model. The conversion method is: mapping the received model through the substation configuration description language to convert the device model into a unified and generally recognizable model. Based on this unified and generally recognizable model, subsequent unified processing of these devices accessed according to different protocols can be realized.

[0045] Specifically, the slave station and the secondary equipment in the currently newly built substation generally use the IEC61850 protocol for protocol communication, but for many existing substations, the slave station may also use the IEC60870-5-103 protocol and its variants for protocol communication; in this embodiment, the slave station sets corresponding methods to receive the device models of these devices using different protocols. The method for the slave station to receive the device model of the access device according to the protocol used by the device includes:

[0046] A) If the protocol used by the access device is the IEC61850 protocol, directly download the CID file of the access device to download the model of the preset data points in the access device, so as to realize the reception of the device model of the device;

[0047] B) If the protocol used by the access device is IEC 60870-5-103 and its variant protocols, the model of the data points in the access device is summoned through the general classification service or the model summons method set according to the protocol it uses, so as to realize the reception of the device model of the device. That is, IEC 60870-5-103 describes two methods of information exchange: the first method is based on strictly defined application service data units (ASDUs) and application processes for transmitting "standardized" messages, and the second method uses the general classification service of the IEC 60870-5-103 protocol to transmit almost all possible information; if appropriate, it is mandatory to use the defined messages and application processes. The general classification service is adopted in other cases. The corresponding application service data unit is not specified for model summons, and it can only be realized by using the general classification service.

[0048] Embodiment of the device model acquisition system of the protection information substation

[0049] This embodiment provides a technical solution for the device model acquisition system of the protection information substation. The system includes a processor, and executable program instructions are stored in the processor. The executable program instructions are used to implement the model acquisition method of the protection information substation in the embodiment of the model acquisition method of the protection information substation as described above.

[0050] Since the specific working mode and working principle of the device model acquisition system of the protection information substation in this embodiment have been described in detail in the above-mentioned embodiment of the model acquisition method of the protection information substation, they will not be elaborated here.

[0051] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention.

Claims

1. A method for collecting equipment models of a trustworthy substation, characterized in that: include: The Baoxin substation detects devices in the same network segment as the substation based on its own network address, and performs a link test on the detected device to detect whether the device has the ability to link to the substation and a protocol test to detect whether the protocol used by the device exists in the protocol library of the substation. Devices that pass these two tests are connected to the substation and the device model of the connected device is received at the substation to complete the collection of the device model.

2. The device model acquisition method of the trustworthy substation according to claim 1 is characterized in that: The link test includes: using a database that pre-stores the ports of secondary devices used in the current power system and the link mode information corresponding to the ports, linking with the detected ports of the secondary devices according to the link mode information in the database, and if there is link mode information in the database that makes the link successful, it is determined that the device has passed the link test.

3. The device model acquisition method of the trustworthy substation according to claim 2 is characterized in that: The protocol test includes: using a protocol library that pre-stores the protocols used by the secondary devices that need to access the substation, and performing corresponding protocol communications on the devices that have passed the link test according to the protocols in the protocol library; if there is a protocol in the protocol library that makes the corresponding protocol communication successful, it is determined that the device has passed the protocol test.

4. The device model acquisition method of the trustworthy substation according to any one of claims 1 to 3, characterized in that: The network address of the substation itself is obtained according to the IP address and mask of the substation itself.

5. The device model acquisition method of the trustworthy substation according to any one of claims 1 to 3, characterized in that: The ways in which a substation detects a device in the same network segment as the substation based on its own network address include: The substation uses the protocol in the TCP protocol cluster within the substation to perform detection according to the substation's own network address, and regards the detected device with the same network address as the substation as the detected device in the same network segment as the substation.

6. The device model acquisition method of the trustworthy substation according to any one of claims 1 to 3, characterized in that: The methods for receiving the device model of the access device at the substation include: The substation receives the device model of the access device according to the protocol used by the access device, and performs model mapping on the received device model to convert the received device model into a unified model.

7. The device model acquisition method of the trustworthy substation according to claim 6 is characterized in that: The method of receiving the device model of the access device at the substation according to the protocol used by the device includes: If the protocol used by the access device is the IEC61850 protocol, the model of the data point preset in the access device is downloaded directly by downloading the CID file of the access device, thereby receiving the device model of the device; If the protocol used by the access device is IEC60870-5-103 and its variant protocols, the model of the data point in the access device is summoned through the general classification service or the model summoning method set according to the protocol used, thereby receiving the device model of the device.

8. The device model acquisition method of the trustworthy substation according to any one of claims 1 to 3, characterized in that: The received model is mapped to transform the received device model into a unified model by mapping the received model through the substation configuration description language to transform the device model into a unified universally recognizable model.

9. The device model acquisition method of the trustworthy substation according to any one of claims 1 to 3, characterized in that: The way of connecting the equipment that has passed the two tests to the substation includes: the substation establishes a communication connection with the equipment that has passed the link test and the protocol test through a collector provided inside the substation to connect to the equipment.

10. A device model acquisition system for a trustworthy substation, comprising a processor, characterized in that: The processor is used to execute a computer program to implement the steps of the device model acquisition method of the trustworthy substation described in any one of claims 1-9.

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