Converter station multi-source information acquisition and modeling method, device, equipment and medium

Abstract

The invention relates to the technical field of power system fault diagnosis, in particular to a converter station multi-source information acquisition and modeling method, device, equipment and medium, and the method comprises the steps: obtaining a network structure of a DC control and protection system in a DC converter station, and a communication mode of a data acquisition and monitoring system; sorting multi-source data types of the converter station protection system, analyzing and summarizing a state variable set of state evaluation, setting a supplementary collection mode of missing information, and setting an accessed network structure, a sensing means and an uploading master station scheme according to a communication mode; an object-oriented modeling method is adopted, direct current converter station equipment and intelligent electronic equipment serve as objects, logic nodes of logic equipment distributed in the intelligent electronic equipment objects and interaction of the logic equipment are determined, and an information model for holographic data measurement, arrangement and standardization is established. The method effectively solves the problems that the conventional converter station secondary equipment lacks a unified information model, the protection information needs to be collected manually, the efficiency is low and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of power system fault diagnosis, and in particular to a method, device, equipment and medium for acquiring and modeling multi-source information of a converter station. Background Art

[0002] With the completion and operation of UHV DC transmission lines, the scale of grid interconnection continues to increase, and electrical connections become closer, which not only improves the efficiency of power resource allocation, but also brings new challenges to the safe and stable operation of the power system. In today's large power grid environment, safety and stability issues are becoming more and more prominent, and the difficulty and safety risks of operation and management have also increased significantly. Therefore, how to ensure that large-scale power grids can remain stable in the face of various emergencies has become a key issue that needs to be solved urgently.

[0003] To achieve reliable intelligent diagnosis of DC transmission system faults, it is first necessary to obtain characteristic model data that is consistent with the actual situation on site. However, the current converter station protection and information systems lack uniformity in model standards, resulting in numerous and complex ways to upload information. At the same time, some status information related to fault diagnosis often lacks an active upload mechanism, resulting in a lack of effective data and model basis in the fault diagnosis process.

[0004] In the existing technology, information modeling methods are mostly used for AC systems such as distribution stations. However, the intelligent system of high-voltage DC protection has insufficient state information perception capabilities and poor monitoring information fusion. It is difficult to timely analyze the working status and data anomalies of the UHV DC protection system equipment, and cannot meet the actual needs of DC converter station integrated operation and maintenance for safety and intelligence. In order to improve the comprehensive utilization rate and accuracy of information, and realize rapid analysis and effective early warning of faults, it is urgent to carry out research on multi-source information acquisition and modeling methods for converter stations for intelligent fault diagnosis.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The present invention provides a method, device, equipment and medium for acquiring and modeling multi-source information of a converter station, thereby effectively solving the problems in the background technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a method for acquiring and modeling multi-source information of a converter station, comprising the following steps:

[0008] Obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA;

[0009] Obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA;

[0010] Combined with the operating principle of secondary equipment, the multi-source data types of the converter station protection system are sorted out, the state variable set of the DC system and equipment status evaluation is analyzed and summarized, the supplementary collection method of missing information is set, and the access network structure, perception means and upload master station plan are set according to the communication method;

[0011] An object-oriented modeling method is adopted, with DC converter station equipment and various intelligent electronic devices as objects. The logical nodes of the logical devices distributed in each intelligent electronic device object are determined according to the network structure, perception means and upload master station scheme. With the goal of completing the SCADA system function, the interaction of the logical devices is determined, and an information model for holographic data measurement, organization and standardization is established.

[0012] Furthermore, the network structure of the DC control and protection system in the DC converter station includes:

[0013] Station control layer, the station control layer includes: SCADA system, telecontrol server, alarm graphic gateway;

[0014] Interval layer: The interval layer includes: DC control, DC protection, AC filter protection, AC / DC station control, and station power control equipment;

[0015] Process layer: The process layer includes: I / O system, merging unit;

[0016] The station control layer is connected to the bay layer via an Ethernet switch, the station control layer obtains real-time status information and alarm information from the devices in the bay layer, and sends control instructions to the bay layer;

[0017] The interval layer and the process layer are connected by a high-speed real-time communication network. The I / O system and merging unit of the process layer transmit real-time electrical quantity information to the equipment of the interval layer through sampling values; the process layer converts the collected analog and switch quantity information into digital signals, and then transmits them to the interval layer through the high-speed network for processing.

[0018] Furthermore, the communication mode of the data acquisition and monitoring system SCADA includes:

[0019] The SCADA network is connected in a star structure, the transport layer protocol adopts the Transmission Control Protocol / Internet Protocol TCP / IP protocol, and the application layer adopts the 103 protocol or the IEC 61850 Manufacturing Message Specification MMS protocol; the station control layer adopts dual network cards to connect to the SCADA network.

[0020] Furthermore, the multi-source data types of the converter station protection system include: action events, alarm events, protection changes, protection telemetry, device waveforms and constants.

[0021] Furthermore, the multi-source heterogeneous information between the master station system and the converter station is transmitted through the dispatching data network, and different transmission methods are applied to different types of data, including:

[0022] Based on DL / T 476 protocol, the event sequence recorder SER event information of the DC control and protection device is uploaded through the converter station event direct transmission server;

[0023] Based on the IEC 104 protocol, the converter station event direct transmission server is used to upload the converter station related telesignaling, telemetering, and telepulse status information, including DC operation mode, switch position, unlocking status, pole power, and voltage / current;

[0024] Based on the DL / T 860 protocol, the built-in recording file of the DC control and protection device is uploaded through the converter station control and protection recording direct transmission server;

[0025] Based on DL / T 860 and other security protocols, the security data of the DC protection host setting in the station is accessed through the security substation.

[0026] Furthermore, the method for supplementing the collection of missing information includes:

[0027] For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol; when a waveform file is generated, the dispatching master station is notified, and the master station calls the waveform list to obtain the waveform file of the DC protection;

[0028] For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2, and uploads the event alarm information of the converter station;

[0029] For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host are not sent directly to the main station through the LAN network in the station. A new external device, namely the DC information collection unit, is added to collect the same source signals of the protection host, and then sent to the protection substation through the DC protection network;

[0030] For the supplementary collection of the protection exit pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and uploading of the information.

[0031] Furthermore, the establishment of an information model for holographic data measurement, organization and standardization includes:

[0032] Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information;

[0033] The IEC 61850 standard is used to define common logical nodes for describing basic information of logical devices, and the common logical nodes are logical nodes that must be included in the logical devices;

[0034] The logical node CSIM of the condition monitoring information model is modeled using intelligent digital device integration SDDI;

[0035] The logical node CAIP of the patrol inspection alarm information model adopts the general object-oriented GGIO modeling;

[0036] For the logical node CAIO of the operation and maintenance alarm information model, GGIO is used to extend its definition.

[0037] The present invention also includes a converter station multi-source information acquisition and modeling device, using the above method, the device includes:

[0038] The acquisition unit is used to obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA;

[0039] The multi-source data integration unit is used to combine the operation principle of secondary equipment, sort out the multi-source data types of the converter station protection system, analyze and summarize the state variable set of the DC system and equipment status evaluation, set the supplementary collection method of missing information, set the access network structure, perception means and upload master station plan according to the communication method;

[0040] The modeling unit is used to adopt an object-oriented modeling method, take the DC converter station equipment and each intelligent electronic device as objects, determine the logical nodes of the logical devices distributed in each intelligent electronic device object according to the network structure, sensing means and uploading master station plan, determine the interaction of the logical devices with the goal of completing the SCADA system function, and establish an information model for holographic data measurement, organization and standardization.

[0041] Furthermore, the network structure of the DC control and protection system in the DC converter station includes:

[0042] Station control layer, the station control layer includes: SCADA system, telecontrol server, alarm graphic gateway;

[0043] Interval layer: The interval layer includes: DC control, DC protection, AC filter protection, AC / DC station control, and station power control equipment;

[0044] Process layer: The process layer includes: I / O system, merging unit;

[0045] The station control layer is connected to the bay layer via an Ethernet switch, the station control layer obtains real-time status information and alarm information from the devices in the bay layer, and sends control instructions to the bay layer;

[0046] The interval layer and the process layer are connected by a high-speed real-time communication network. The I / O system and merging unit of the process layer transmit real-time electrical quantity information to the equipment of the interval layer through sampling values; the process layer converts the collected analog and switch quantity information into digital signals, and then transmits them to the interval layer through the high-speed network for processing.

[0047] Furthermore, the communication mode of the data acquisition and monitoring system SCADA includes:

[0048] The SCADA network is connected in a star structure, the transport layer protocol adopts the Transmission Control Protocol / Internet Protocol TCP / IP protocol, and the application layer adopts the 103 protocol or the IEC 61850 Manufacturing Message Specification MMS protocol; the station control layer adopts dual network cards to connect to the SCADA network.

[0049] Furthermore, the multi-source data types of the converter station protection system include: action events, alarm events, protection changes, protection telemetry, device waveforms and constants.

[0050] Furthermore, the multi-source heterogeneous information between the master station system and the converter station is transmitted through the dispatching data network, and different transmission methods are applied to different types of data, including:

[0051] Based on DL / T 476 protocol, the event sequence recorder SER event information of the DC control and protection device is uploaded through the converter station event direct transmission server;

[0052] Based on the IEC 104 protocol, the converter station event direct transmission server is used to upload the converter station related telesignaling, telemetering, and telepulse status information, including DC operation mode, switch position, unlocking status, pole power, and voltage / current;

[0053] Based on the DL / T 860 protocol, the built-in recording file of the DC control and protection device is uploaded through the converter station control and protection recording direct transmission server;

[0054] Based on the DL / T 860 security protocol, the security data of the DC protection host setting in the station is accessed through the security substation.

[0055] Furthermore, the method for supplementing the collection of missing information includes:

[0056] For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol; when a waveform file is generated, the dispatching master station is notified, and the master station calls the waveform list to obtain the waveform file of the DC protection;

[0057] For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2, and uploads the event alarm information of the converter station;

[0058] For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host are not sent directly to the main station through the LAN network in the station. A new external device, namely the DC information collection unit, is added to collect the same source signals of the protection host, and then sent to the protection substation through the DC protection network;

[0059] For the supplementary collection of the protection exit pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and uploading of the information.

[0060] Furthermore, the modeling unit is also used for:

[0061] Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information;

[0062] The IEC 61850 standard is used to define common logical nodes for describing basic information of logical devices, and the common logical nodes are logical nodes that must be included in the logical devices;

[0063] The logical node CSIM of the condition monitoring information model is modeled using intelligent digital device integration SDDI;

[0064] The logical node CAIP of the patrol inspection alarm information model adopts the general object-oriented GGIO modeling;

[0065] For the logical node CAIO of the operation and maintenance alarm information model, GGIO is used to extend its definition.

[0066] The present invention also includes a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method described above is implemented.

[0067] The present invention also includes a storage medium on which a computer program is stored. When the computer program is executed by a processor, the method described above is implemented.

[0068] The beneficial effects of the present invention are as follows: by proposing a converter station multi-source information acquisition and modeling technology for intelligent fault diagnosis, the problems of the lack of a unified information model for secondary equipment in converter stations, the need for manual collection of protection information, and low efficiency are effectively solved, and the comprehensive utilization of multi-source heterogeneous data in converter stations is achieved, providing strong data support for intelligent fault diagnosis in converter stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0070] Figure 1 is a flow chart of the method in Example 1;

[0071] Figure 2 It is a structural schematic diagram in Example 1;

[0072] Figure 3 This is a flowchart of multi-source information processing in Example 2;

[0073] Figure 4 This is a diagram of a multi-source information uploading method in Example 2;

[0074] Figure 5 It is the structure diagram of the wave recording data acquisition system in Example 2;

[0075] Figure 6 It is a structural diagram of the protection platen collection system in Example 2;

[0076] Figure 7 It is a schematic diagram of the structure of the computer device of the present invention. DETAILED DESCRIPTION

[0077] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0078] Embodiment 1:

[0079] like Figure 1 As shown: A method for acquiring and modeling multi-source information of a converter station comprises the following steps:

[0080] Obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA;

[0081] Combined with the operating principle of secondary equipment, the multi-source data types of the converter station protection system are sorted out, the state variable set of the DC system and equipment status evaluation is analyzed and summarized, the supplementary collection method of missing information is set, and the access network structure, perception means and upload master station plan are set according to the communication method;

[0082] An object-oriented modeling method is adopted, with DC converter station equipment and various intelligent electronic devices as objects. The logical nodes of the logical devices distributed in each intelligent electronic device object are determined according to the network structure, perception means and upload master station plan. With the goal of completing the SCADA system function, the interaction of the logical devices is determined, and an information model for holographic data measurement, organization and standardization is established.

[0083] By proposing a multi-source information acquisition and modeling technology for converter stations for intelligent fault diagnosis, we effectively solve the problems of the lack of a unified information model for secondary equipment in converter stations, the need for manual collection of protection information and low efficiency, and achieve comprehensive utilization of multi-source heterogeneous data in converter stations, providing strong data support for intelligent fault diagnosis in converter stations.

[0084] In this embodiment, the network structure of the DC control and protection system in the DC converter station includes:

[0085] Station control layer, which includes: SCADA system, telecontrol server, alarm graphic gateway;

[0086] Interval layer: The interval layer includes: DC control, DC protection, AC filter protection, AC / DC station control, and station power control equipment;

[0087] Process layer: The process layer includes: I / O system, merging unit;

[0088] The station control layer is connected to the bay layer through an Ethernet switch. The station control layer obtains real-time status information and alarm information from the devices in the bay layer and sends control instructions to the bay layer.

[0089] The interval layer and the process layer are connected by a high-speed real-time communication network. The I / O system and merging unit of the process layer transmit real-time electrical quantity information to the equipment of the interval layer through sampling values. The process layer converts the collected analog and switch quantity information into digital signals and then transmits them to the interval layer for processing through the high-speed network.

[0090] The communication methods of the data acquisition and monitoring system SCADA include:

[0091] The SCADA network adopts a star structure connection, the transport layer protocol adopts the Transmission Control Protocol / Internet Protocol TCP / IP protocol, the application layer adopts the 103 protocol or the IEC 61850 Manufacturing Message Specification MMS protocol; the station control layer uses dual network cards to connect to the SCADA network.

[0092] Among them, the multi-source data types of the converter station protection system include: action events, alarm events, protection changes, protection telemetry, device waveforms and set values.

[0093] As a preferred embodiment of the above, the multi-source heterogeneous information between the master station system and the converter station is transmitted through the dispatching data network, and different transmission modes are applied to different types of data, including:

[0094] Based on DL / T 476 protocol, the event sequence recorder SER event information of the DC control and protection device is uploaded through the converter station event direct transmission server;

[0095] Based on the IEC 104 protocol, the converter station event direct transmission server is used to upload the converter station related telesignaling, telemetering, and telepulse status information, including DC operation mode, switch position, unlocking status, pole power, and voltage / current;

[0096] Based on the DL / T 860 protocol, the built-in recording file of the DC control and protection device is uploaded through the converter station control and protection recording direct transmission server;

[0097] Based on DL / T 860 and other security protocols, the security data of the DC protection host setting in the station is accessed through the security substation.

[0098] In this embodiment, the method for supplementing the collection of missing information is set, including:

[0099] For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol; when a waveform file is generated, the dispatching master station is notified, and the master station calls the waveform list to obtain the waveform file of the DC protection;

[0100] For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2, and uploads the event alarm information of the converter station;

[0101] For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host are not sent directly to the main station through the LAN network in the station. A new external device, namely the DC information collection unit, is added to collect the same source signals of the protection host, and then sent to the protection substation through the DC protection network;

[0102] For the supplementary collection of the protection exit pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and uploading of the information.

[0103] Among them, the information model for holographic data measurement, organization and standardization is established, including:

[0104] Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information;

[0105] Define a common logical node model: Use the IEC 61850 standard to define common logical nodes used to describe basic information of logical devices. Common logical nodes are required logical nodes in logical devices.

[0106] Define the condition monitoring information model: Use intelligent digital device integration (SDDI) to model the logical node CSIM of the condition monitoring information model;

[0107] Define patrol inspection and alarm information model: The logical node CAIP of patrol inspection and alarm information model adopts general object-oriented GGIO modeling;

[0108] Define the operation and maintenance alarm information model: For the logical node CAIO of the operation and maintenance alarm information model, GGIO is used to extend its definition.

[0109] like Figure 2 As shown, this embodiment also includes a converter station multi-source information acquisition and modeling device, using the above method, the device includes:

[0110] The acquisition unit is used to obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA;

[0111] The multi-source data integration unit is used to combine the operating principle of secondary equipment, sort out the multi-source data types of the converter station protection system, analyze and summarize the state variable set of the DC system and equipment status evaluation, set the supplementary collection method of missing information, set the access network structure according to the communication method, the sensing method and the upload master station plan;

[0112] The modeling unit is used to adopt an object-oriented modeling method, taking the DC converter station equipment and each intelligent electronic device as objects, and determining the logical nodes of the logical devices distributed in each intelligent electronic device object according to the network structure, sensing means and upload master station plan, with the goal of completing the SCADA system function, determining the interaction of the logical devices, and establishing an information model for holographic data measurement, organization and standardization.

[0113] In this embodiment, the network structure of the DC control and protection system in the DC converter station includes:

[0114] Station control layer, which includes: SCADA system, telecontrol server, alarm graphic gateway;

[0115] Interval layer: The interval layer includes: DC control, DC protection, AC filter protection, AC / DC station control, and station power control equipment;

[0116] Process layer: The process layer includes: I / O system, merging unit;

[0117] The station control layer is connected to the bay layer through an Ethernet switch. The station control layer obtains real-time status information and alarm information from the devices in the bay layer and sends control instructions to the bay layer.

[0118] The interval layer and the process layer are connected by a high-speed real-time communication network. The I / O system and merging unit of the process layer transmit real-time electrical quantity information to the equipment of the interval layer through sampling values. The process layer converts the collected analog and switch quantity information into digital signals and then transmits them to the interval layer for processing through the high-speed network.

[0119] The communication methods of the data acquisition and monitoring system SCADA include:

[0120] The SCADA network adopts a star structure connection, the transport layer protocol adopts the Transmission Control Protocol / Internet Protocol TCP / IP protocol, the application layer adopts the 103 protocol or the IEC 61850 Manufacturing Message Specification MMS protocol; the station control layer uses dual network cards to connect to the SCADA network.

[0121] Among them, the multi-source data types of the converter station protection system include: action events, alarm events, protection changes, protection telemetry, device waveforms and set values.

[0122] As a preferred embodiment of the above, the multi-source heterogeneous information between the master station system and the converter station is transmitted through the dispatching data network, and different transmission modes are applied to different types of data, including:

[0123] Based on DL / T 476 protocol, the event sequence recorder SER event information of the DC control and protection device is uploaded through the converter station event direct transmission server;

[0124] Based on the IEC 104 protocol, the converter station event direct transmission server is used to upload the converter station related telesignaling, telemetering, and telepulse status information, including DC operation mode, switch position, unlocking status, pole power, and voltage / current;

[0125] Based on the DL / T 860 protocol, the built-in recording file of the DC control and protection device is uploaded through the converter station control and protection recording direct transmission server;

[0126] Based on the DL / T 860 security protocol, the security data of the DC protection host setting in the station is accessed through the security substation.

[0127] In this embodiment, the method for supplementing the collection of missing information is set, including:

[0128] For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol; when a waveform file is generated, the dispatching master station is notified, and the master station calls the waveform list to obtain the waveform file of the DC protection;

[0129] For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2, and uploads the event alarm information of the converter station;

[0130] For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host are not sent directly to the main station through the LAN network in the station. A new external device, namely the DC information collection unit, is added to collect the same source signals of the protection host, and then sent to the protection substation through the DC protection network;

[0131] For the supplementary collection of the protection exit pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and uploading of the information.

[0132] Among other things, the modeling unit is also used for:

[0133] Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information;

[0134] The IEC 61850 standard is used to define common logical nodes used to describe basic information of logical devices. Common logical nodes are necessary logical nodes in logical devices.

[0135] The logical node CSIM of the condition monitoring information model is modeled using intelligent digital device integration SDDI;

[0136] The logical node CAIP of the patrol inspection alarm information model adopts the general object-oriented GGIO modeling;

[0137] For the logical node CAIO of the operation and maintenance alarm information model, GGIO is used to extend its definition.

[0138] Embodiment 2:

[0139] Specific implementation reference Figure 3 , a converter station multi-source information acquisition and modeling method for fault intelligent diagnosis includes the following steps:

[0140] 1) Research and deploy the “three-layer three-network” network structure and SCADA network communication mode of the DC control and protection system in the DC converter station. Investigate and analyze the data acquisition network structure of the DC protection system of major domestic suppliers to lay the foundation for the subsequent sorting of multi-source information.

[0141] 2) Combined with the operating principle of secondary equipment, the multi-source data types of the converter station protection system are sorted out, the state variable set of the DC system and equipment status evaluation is analyzed and summarized, and the supplementary collection method, access network structure, perception means and upload to the master station plan for various types of protection information, especially missing information, are designed.

[0142] 3) Based on the IEC 61850 standard, an object-oriented modeling method is adopted, and the DC converter station equipment and each intelligent electronic device (IED) are taken as objects. The logical nodes of the logical devices distributed in the IED objects interact to complete their system functions. The SDDI and GGIO modeling methods are applied to establish a set of information models that meet the holographic data measurement, organization and standardization of the control and protection system.

[0143] Step 1) includes the following steps to study and deploy the network structure and SCADA network communication mode of the DC control and protection system in the DC converter station:

[0144] ① The converter station monitoring system and DC control and protection system shall be deployed in accordance with the "three-layer and three-network" structure, strictly follow the localization principle, implement the requirements for the distribution and minimization of the interval layer and process layer networks, strengthen the on-site data collection and processing of the process layer network of the measurement and control and protection devices, and the physical independence of the export unit and other parts, so as to minimize the safety risks of protection and measurement and control services.

[0145] ② The three-layer deployment of the converter station is as follows: SCADA system (including servers, operator workstations, etc.), telecontrol servers, alarm graphic gateways, etc. are deployed at the station control layer; DC control, DC protection, AC filter protection, AC / DC station control, station power control and other equipment are deployed at the bay layer; I / O system, merging unit, etc. are deployed at the process layer.

[0146] ③Study and debug the communication mode of the SCADA network of the DC control and protection system: The SCADA network adopts a star structure connection and is a redundant dual network configuration. The transport layer protocol adopts the TCP / IP protocol, and the application layer adopts the 103 protocol or the IEC 61850MMS protocol. The DC control and protection system, operator workstation (OWS), server, and telecontrol workstation are all connected to the SCADA network using dual network cards and run at 10 / 100 / 1000Mbps adaptively.

[0147] In step 2), the scheme for collecting, classifying and uploading multi-source information of DC system converter stations, especially missing information, includes the following steps:

[0148] ① The multi-source data types of the converter station protection system are sorted out, which are mainly divided into action events, alarm events, protection position change, protection telemetry, device waveform and setting value. The specific classification is shown in Table 1.

[0149] Table 1 Classification of multi-source information

[0150]

[0151] ② At present, the multi-source heterogeneous information between the master station system and the converter station is mainly carried out through the dispatching data network of the safety zone II, and different transmission methods are applied to different types of data. Figure 4 As shown, specifically:

[0152] a. Based on DL / T 476 protocol, upload the SER event information of the DC control and protection device through the converter station event direct transmission server;

[0153] b. Based on the IEC 104 protocol, upload the converter station related telesignaling, telemetering and telepulse status information through the converter station event direct transmission server, including DC operation mode, switch position, unlocking status, pole power and voltage / current, etc.;

[0154] c. Based on the DL / T 860 protocol, upload the built-in recording file of the DC control and protection device through the converter station control and protection recording direct transmission server;

[0155] d. Based on DL / T 860 and other security protocols, access the security data such as the DC protection host setting in the station through the security substation.

[0156] ③ Analyze the information classification and actual collection and upload of the DC protection secondary equipment of the converter station. At present, it is clear that the missing information includes the built-in recording data of the equipment, SER events and operation mode, protection measurement of DC protection devices, and protection outlet pressure plate, etc. Design supplementary collection and upload plans for different missing information, specifically:

[0157] a. For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol. When a waveform file is generated, the dispatching master station can be notified, and the master station will call the waveform list to obtain the waveform file of the DC protection.

[0158] Connect the control and protection fault recording front-end server to the station LAN network, such as Figure 5The structure of the recording data acquisition system is shown. Through TCP / IP communication with the file server, cross-platform disk mapping software is used to map the DC control and protection system fault recording directory on the file server to the DC fault recording front-end server, which directly performs file retrieval and reading. At the same time, the control and protection fault recording front-end server is connected to the dispatching data network LAN2 through the firewall to communicate with the provincial dispatching protection information system, and the IEC 61850 standard is adopted to realize the fast and reliable remote transmission of the built-in recording file.

[0159] b. For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2 and uploads the event alarm information of the converter station.

[0160] The event direct transmission server can also collect AC and DC operation mode information from the converter station monitoring system, and upload this information to the dispatching master station via the dispatching data network LAN2 using the IEC104 communication protocol.

[0161] c. For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host cannot be directly sent to the main station through the LAN network in the station. In order to meet the data requirements of fault diagnosis, an external device, namely the DC information acquisition unit, can be added to realize the collection of the same source signal of the protection host, and then sent to the protection substation through the DC protection network;

[0162] d. For the supplementary collection of the protection of the export pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and upload of the information. The export pressure plate status collection system consists of the sensing layer, the convergence layer and the application layer. In the sensing layer, the pressure plate position sensor is installed; in the convergence layer, the data collection terminal is installed; in the application layer, the pressure plate centralized monitoring host is installed. The system structure is as follows Figure 6 shown.

[0163] In step 3), an object-oriented modeling method is adopted based on the IEC 61850 standard to construct a converter station multi-source information model, which includes the following steps:

[0164] ① Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information. The multi-source information model designed by the present invention decomposes its functions to obtain the following required logical nodes: CCLN, CSIM, CAIP and CAIO. The logical nodes and their descriptions are shown in Table 2.

[0165] Table 2 Logical nodes and descriptions of the information model

[0166]

[0167]

[0168] This information model supports all secondary devices such as DC control and protection hosts in the converter station to exchange information with clients such as the intelligent operation and maintenance master station using the MMS protocol. At the same time, unified information modeling specifications and data specifications are used to collect, manage and operate the data information of each secondary device.

[0169] The logical nodes of the multi-source information model are strictly defined in accordance with the IEC 61850 standard. Therefore, the data sets used by the logical nodes are: INC, INS, LPL, SPS and MV, corresponding to the controllable integer state, integer state, logical node nameplate, single point state and measurement value respectively. M / O is used to indicate whether the data is mandatory or optional. M indicates mandatory information, such as common logical node information; O indicates optional status information or monitoring information.

[0170] ② Define the common logical node model: IEC 61850 standard defines the common logical node (CCLN) used to describe the basic information of the logical device, which is also a necessary logical node in the logical device. The data objects contained in the common logical node are shown in Table 3.

[0171] Table 3 Data objects of CCLN

[0172] Property name Attribute Category Full name M / O Chinese description Mod INC Mode M model Beh INS Behaviour M performance Health INS Health M Health status NamPlt LPL Name M Logical node nameplate

[0173] ③ Define the condition monitoring information model: The logical node CSIM of the condition monitoring information model is modeled using SDDI, and the definition of its data objects is shown in Table 4. When instantiating, the name of the monitored IED, i.e., IEDName, is filled in the logical node prefix attribute to achieve association with the protection device. The CSIM data object uses the predefined communication state (dsCommState) data set.

[0174] Table 4 CSIM data objects

[0175]

[0176] ④ Define patrol inspection alarm information model: The logical node CAIP of the patrol inspection alarm information model is modeled using GGIO, and its definition is shown in Table 5. The data object of CAIP uses the predefined alarm signal (dsWarning) data set.

[0177] Table 5 CAIP data objects

[0178]

[0179]

[0180] ⑤ Define the operation and maintenance alarm information model: For the logical node CAIO of the operation and maintenance alarm information model, GGIO is also used to extend its definition, and some definitions of its data objects are shown in Table 6. By extending the operation and maintenance alarm information, more monitoring data can be added to the multi-source information model, and more information related to the operating status of the secondary equipment of the converter station can be collected, providing more information basis for the intelligent diagnosis of converter station faults.

[0181] Table 6 CAIO data objects

[0182]

[0183] Working principle: This embodiment provides a method for acquiring and modeling multi-source information of a converter station for intelligent fault diagnosis. The present invention first studies and deploys the network structure and SCADA network communication mode of the "three-layer three-network" DC control and protection system in the DC converter station; then, according to the information collection, classification and missing situation of the DC protection equipment in the current converter station, combined with the topological structure and communication mode of the secondary system of the converter station, the network structure, perception means and the supplementary collection and upload method of the missing information for various types of protection information access are studied and designed; finally, based on the IEC 61850 standard, the SDDI and GGIO modeling methods under the standard are adopted, combined with the operating principle of the secondary equipment, the state variable set of the DC converter station equipment status evaluation is analyzed and summarized, and the information model under the influence of multi-source data is acquired and constructed. The multi-source information acquisition and modeling technology for converter stations for intelligent fault diagnosis proposed in the present invention effectively solves the problems of the lack of a unified information model for the secondary equipment of the converter station in the past, the need for manual collection of protection information, and low efficiency, and realizes the comprehensive utilization of multi-source heterogeneous data of the converter station, providing strong data support for intelligent diagnosis of converter station faults.

[0184] See also Figure 7 A computer device 400 provided in an embodiment of the present application includes: a processor 410 and a memory 420, wherein the memory 420 stores a computer program executable by the processor 410, and when the computer program is executed by the processor 410, the above method is executed.

[0185] The embodiment of the present application further provides a storage medium 430 on which a computer program is stored. When the computer program is run by the processor 410, the above method is executed.

[0186] Among them, the storage medium 430 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable red-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, disk or optical disk.

[0187] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0188] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0189] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0190] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0191] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0192] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0193] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0194] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for acquiring and modeling multi-source information of a converter station, characterized in that: The steps include: Obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA; Combined with the operating principle of secondary equipment, the multi-source data types of the converter station protection system are sorted out, the state variable set of the DC system and equipment status evaluation is analyzed and summarized, the supplementary collection method of missing information is set, and the access network structure, perception means and upload master station plan are set according to the communication method; An object-oriented modeling method is adopted, with DC converter station equipment and various intelligent electronic devices as objects. The logical nodes of the logical devices distributed in each intelligent electronic device object are determined according to the network structure, perception means and upload master station scheme. With the goal of completing the SCADA system function, the interaction of the logical devices is determined, and an information model for holographic data measurement, organization and standardization is established.

2. The method for acquiring and modeling multi-source information of a converter station according to claim 1, characterized in that: The network structure of the DC control and protection system in the DC converter station includes: Station control layer, the station control layer includes: SCADA system, telecontrol server, alarm graphic gateway; Interval layer: The interval layer includes: DC control, DC protection, AC filter protection, AC / DC station control, and station power control equipment; Process layer: The process layer includes: I / O system, merging unit; The station control layer is connected to the bay layer via an Ethernet switch, the station control layer obtains real-time status information and alarm information from the devices in the bay layer, and sends control instructions to the bay layer; The interval layer and the process layer are connected by a high-speed real-time communication network. The I / O system and merging unit of the process layer transmit real-time electrical quantity information to the equipment of the interval layer through sampling values; the process layer converts the collected analog and switch quantity information into digital signals, and then transmits them to the interval layer through the high-speed network for processing.

3. The method for acquiring and modeling multi-source information of a converter station according to claim 2, characterized in that: The communication methods of the data acquisition and monitoring system SCADA include: The SCADA network is connected in a star structure, the transport layer protocol adopts the Transmission Control Protocol / Internet Protocol TCP / IP protocol, and the application layer adopts the 103 protocol or the IEC 61850 Manufacturing Message Specification MMS protocol; the station control layer adopts dual network cards to connect to the SCADA network.

4. The method for acquiring and modeling multi-source information of a converter station according to claim 1, characterized in that: The multi-source data types of the converter station protection system include: action events, alarm events, protection changes, protection telemetry, device waveforms and set values.

5. The method for acquiring and modeling multi-source information of a converter station according to claim 4, characterized in that: The multi-source heterogeneous information between the master station system and the converter station is transmitted through the dispatching data network, and different transmission methods are applied to different types of data, including: Based on DL / T 476 protocol, the event sequence recorder SER event information of the DC control and protection device is uploaded through the converter station event direct transmission server; Based on the IEC 104 protocol, the converter station event direct transmission server is used to upload the converter station related telesignaling, telemetering, and telepulse status information, including DC operation mode, switch position, unlocking status, pole power, and voltage / current; Based on the DL / T 860 protocol, the built-in recording file of the DC control and protection device is uploaded through the converter station control and protection recording direct transmission server; Based on the DL / T 860 security protocol, the security data of the DC protection host setting in the station is accessed through the security substation.

6. The method for acquiring and modeling multi-source information of a converter station according to claim 5, characterized in that: The method for supplementing the collection of the missing information includes: For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol; when a waveform file is generated, the dispatching master station is notified, and the master station calls the waveform list to obtain the waveform file of the DC protection; For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2, and uploads the event alarm information of the converter station; For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host are not sent directly to the main station through the LAN network in the station. A new external device, namely the DC information collection unit, is added to collect the same source signals of the protection host, and then sent to the protection substation through the DC protection network; For the supplementary collection of the protection exit pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and uploading of the information.

7. The method for acquiring and modeling multi-source information of a converter station according to claim 1, characterized in that: The information model for measuring, organizing and standardizing holographic data is established, including: Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information; The IEC 61850 standard is used to define common logical nodes for describing basic information of logical devices, and the common logical nodes are logical nodes that must be included in the logical devices; The logical node CSIM of the condition monitoring information model is modeled using intelligent digital device integration SDDI; The logical node CAIP of the patrol inspection alarm information model adopts the general object-oriented GGIO modeling; For the logical node CAIO of the operation and maintenance alarm information model, GGIO is used to extend its definition.

8. A converter station multi-source information acquisition and modeling device, characterized in that: include: The acquisition unit is used to obtain the network structure of the DC control and protection system in the DC converter station, and the communication mode of the data acquisition and monitoring system SCADA; The multi-source data integration unit is used to combine the operation principle of secondary equipment, sort out the multi-source data types of the converter station protection system, analyze and summarize the state variable set of the DC system and equipment status evaluation, set the supplementary collection method of missing information, set the access network structure, perception means and upload master station plan according to the communication method; The modeling unit is used to adopt an object-oriented modeling method, take the DC converter station equipment and each intelligent electronic device as objects, determine the logical nodes of the logical devices distributed in each intelligent electronic device object according to the network structure, sensing means and uploading master station plan, determine the interaction of the logical devices with the goal of completing the SCADA system function, and establish an information model for holographic data measurement, organization and standardization.

9. The converter station multi-source information acquisition and modeling device according to claim 8, characterized in that: The network structure of the DC control and protection system in the DC converter station includes: Station control layer, the station control layer includes: SCADA system, telecontrol server, alarm graphic gateway; Interval layer: The interval layer includes: DC control, DC protection, AC filter protection, AC / DC station control, and station power control equipment; Process layer: The process layer includes: I / O system, merging unit; The station control layer is connected to the bay layer via an Ethernet switch, the station control layer obtains real-time status information and alarm information from the devices in the bay layer, and sends control instructions to the bay layer; The interval layer and the process layer are connected by a high-speed real-time communication network. The I / O system and merging unit of the process layer transmit real-time electrical quantity information to the equipment of the interval layer through sampling values; the process layer converts the collected analog and switch quantity information into digital signals, and then transmits them to the interval layer through the high-speed network for processing.

10. The converter station multi-source information acquisition and modeling device according to claim 9, characterized in that: The communication methods of the data acquisition and monitoring system SCADA include: The SCADA network is connected in a star structure, the transport layer protocol adopts the Transmission Control Protocol / Internet Protocol TCP / IP protocol, and the application layer adopts the 103 protocol or the IEC 61850 Manufacturing Message Specification MMS protocol; the station control layer adopts dual network cards to connect to the SCADA network.

11. The converter station multi-source information acquisition and modeling device according to claim 8, characterized in that: The multi-source data types of the converter station protection system include: action events, alarm events, protection changes, protection telemetry, device waveforms and set values.

12. The converter station multi-source information acquisition and modeling device according to claim 11, characterized in that: The multi-source heterogeneous information between the master station system and the converter station is transmitted through the dispatching data network, and different transmission methods are applied to different types of data, including: Based on DL / T 476 protocol, the event sequence recorder SER event information of the DC control and protection device is uploaded through the converter station event direct transmission server; Based on the IEC 104 protocol, the converter station event direct transmission server is used to upload the converter station related telesignaling, telemetering, and telepulse status information, including DC operation mode, switch position, unlocking status, pole power, and voltage / current; Based on the DL / T 860 protocol, the built-in recording file of the DC control and protection device is uploaded through the converter station control and protection recording direct transmission server; Based on the DL / T 860 security protocol, the security data of the DC protection host setting in the station is accessed through the security substation.

13. The converter station multi-source information acquisition and modeling device according to claim 12, characterized in that: The method for supplementing the collection of the missing information includes: For the supplementary collection of built-in recording data, a recording front-end is added to the station LAN network to obtain the built-in waveform data of the DC protection host, and communicate with the dispatching master station based on the MMS protocol; when a waveform file is generated, the dispatching master station is notified, and the master station calls the waveform list to obtain the waveform file of the DC protection; For the supplementary collection of SER events and operation modes, the event direct transmission server reads the event alarm information of the converter station from the converter station monitoring system through the firewall, uses the DL476 protocol to communicate with the protection information master station system through the dispatching data network LAN2, and uploads the event alarm information of the converter station; For the supplementary collection of protection measurements, according to the actual situation in the converter station, the protection measurement signals collected by the DC protection host are not sent directly to the main station through the LAN network in the station. A new external device, namely the DC information collection unit, is added to collect the same source signals of the protection host, and then sent to the protection substation through the DC protection network; For the supplementary collection of the protection exit pressure plate, the intelligent pressure plate monitoring device with wireless transmission is used to realize the supplementary acquisition and uploading of the information.

14. The converter station multi-source information acquisition and modeling device according to claim 8, characterized in that: The modeling unit is also used for: Abstract the logical nodes of the converter station multi-source information model into specific functions, namely, monitoring of status information and alarm information; The IEC 61850 standard is used to define common logical nodes for describing basic information of logical devices, and the common logical nodes are logical nodes that must be included in the logical devices; The logical node CSIM of the condition monitoring information model is modeled using intelligent digital device integration SDDI; The logical node CAIP of the patrol inspection alarm information model adopts the general object-oriented GGIO modeling; For the logical node CAIO of the operation and maintenance alarm information model, GGIO is used to extend its definition.

15. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

16. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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