Decoupling method for protection configuration information of intelligent substation

Abstract

The invention relates to a decoupling method for intelligent substation protection configuration information, and belongs to the technical field of intelligent substations. Comprising the steps that a GOOSE sending data set of a spacer layer device is formulated into a protection data set according to each circuit breaker interval needing to be tripped; carrying out format unification processing on the communication parameters of each group of GOOSE and SV data; defining a polarity parameter, a reversed polarity channel parameter and a bus voltage selection parameter of receiving data of each group of SV data; for a bay level device needing station level interlocking information, the following steps are executed: when the bay level device performs ICD modeling, an access point of a station level data set is defined as S1, and logic equipment of the station level data set is CTRL or MEAS; only connecting a virtual terminal of a station control layer data set of the spacer layer device to the spacer layer device; and exporting a configuration file of the spacer layer device based on the SCD file of the virtual terminal connection line. According to the invention, while relevant parameters are configured in time, a new-old interval transmission test is not carried out, so that the risk of field operation is reduced to a certain extent.

Description

Technical Field

[0001] The invention relates to a decoupling method for protection configuration information of an intelligent substation, and belongs to the technical field of intelligent substations. Background Art

[0002] Compared with conventional substations, the information connection between secondary equipment in smart substations changes from hard wiring of secondary cables to virtual circuits of message communication. However, the virtual circuits are difficult to visualize and have flexible and changeable configurations, which brings new challenges to on-site operation and maintenance.

[0003] The SCD (Substation Configuration Description) file of the smart substation is integrated by the engineers of the equipment manufacturer. Due to factors such as on-site working conditions, technical level of personnel and tight commissioning time, human problems such as virtual terminal connection errors often occur. Operation and maintenance personnel still need to rely on external integrators to carry out routine work such as debugging, troubleshooting and technical transformation, which breaks the situation of autonomous and controllable debugging and operation and maintenance.

[0004] Smart substation communication relies on the unified SCD file of the whole station. Any change in any device in the smart substation requires updating the configuration file exported from the SCD file, mainly referring to the CCD (Configured Circuit Description) file. In particular, after the substation interval is modified and expanded, the busbar protection needs to re-download the configuration file related to the communication of all intervals. To this end, it is necessary to take a one-time equipment stop or a single set of protection devices to stop in rotation and re-carry out the transmission test of the new and old intervals to ensure that the protection, control and monitoring circuits of the new interval equipment (such as newly installed circuit breakers, disconnectors, etc.) or the modified interval equipment can work correctly and reliably before being put into operation. However, this method increases the risk of on-site operations and affects the reliable power supply of the power grid.

[0005] If the relay protection of smart substations can be operated without configuration or simple manual settings similar to setting, and no configuration files are needed, the configuration and operation and maintenance problems of relay protection in smart substations will be solved.

[0006] Currently, a device only needs to download a CCD configuration file exported from the SCD file. If the process layer configuration file is exempted, for devices that require station layer information, the station layer configuration file is still required, so the CCD configuration file is required to remove the process layer configuration information.

[0007] After the process layer configuration file in the CCD configuration file is decoupled from the station control layer configuration file, it is also necessary to consider how to configure the parameters of the process layer device. For example, when the field current is connected with reverse polarity, a method of decoupling the current polarity and configuration is urgently needed to achieve the correct collection of the protection current; the bus voltage merge unit data set contains three groups of voltages. When the voltage is switched, a method of decoupling the voltage switching and configuration is urgently needed to achieve the correct collection of the protection voltage. Summary of the invention

[0008] The purpose of the present invention is to provide a decoupling method for protection configuration information of a smart substation, so as to solve the problem of a sharp increase in the risk of field operations caused by transmission tests of new and old intervals carried out due to changes in configuration files.

[0009] To achieve the above object, the solution of the present invention includes: A decoupling method for protection configuration information of a smart substation of the present invention comprises: The GOOSE sending data set of the bay layer device is formulated as a unique protection data set with the name and position of the protection signal according to each circuit breaker bay that needs to trip; Unify the format of communication parameters for each set of GOOSE and SV data; Define the polarity parameters, reverse polarity channel parameters and bus voltage selection parameters of each set of SV data; For bay layer devices that require station control layer interlocking information, the following steps are also performed: When the bay layer device is modeled in ICD, it is defined as follows: the access point of the station control layer data set is S1, and the logical device of the station control layer data set is CTRL or MEAS; For bay layer devices, only the virtual terminals of the station control layer data set are connected; Based on the SCD file of the virtual terminal connection, the station control layer configuration file of the bay layer device is exported, and after the bay layer device downloads the configuration file, the configuration file is parsed by the software of the device.

[0010] Furthermore, when the polarity parameter is set to a positive polarity parameter, the current analog channel data originally received is displayed and a logical operation is performed; when the polarity parameter is set to a reverse polarity parameter, the current analog channel data defined by the reverse polarity channel parameter is reversed and displayed and a logical operation is performed.

[0011] Furthermore, it also includes: when reverse polarity processing is required, the polarity parameters and reverse polarity channel parameters of each group of SV receiving data are opened, otherwise the polarity parameters and reverse polarity channel parameters of each group of SV receiving data are shielded.

[0012] Furthermore, the definition of the bus voltage selection parameters includes the selection of the voltage channel for the bus voltage: when the bus voltage selects the I bus voltage channel, the II bus voltage channel or the III bus voltage channel, the bus voltage takes the data of the corresponding I bus voltage channel, the II bus voltage channel or the III bus voltage channel for logical calculation.

[0013] Furthermore, it also includes: when it is necessary to select a voltage channel, the bus voltage selection parameter is opened, otherwise the bus voltage selection parameter is shielded.

[0014] Furthermore, the GOOSEPUB of the station control layer configuration file only includes relevant information sent by the station control layer GOOSE, the access point of the station control layer is S1, and the sending optical port is the physical port of the station control layer.

[0015] Furthermore, the GOOSESUB of the station control layer configuration file only contains relevant information received by the station control layer GOOSE, where the access point of the station control layer is S1 and the receiving optical port is the physical port of the station control layer; the relevant information received by GOOSE includes the logical interlocking double-point information connecting the virtual terminals.

[0016] Furthermore, the bay layer device requiring station control layer interlocking information includes a measurement and control device or a security and measurement integrated device.

[0017] Furthermore, the analysis includes: only analyzing the contents of the control blocks in GOOSEPUB and GOOSESUB whose access point is S1 and whose logical device is CTRL or MEAS, only performing a link break judgment on the station control layer GOOSE reception, and receiving the logic interlocking double-point information input.

[0018] Furthermore, all parameters of each set of SV data are set in display groups in the data template so that they can be displayed and adjusted on the display menu of the bay layer device; communication parameters are displayed and adjusted on the display menu of the bay layer device.

[0019] Beneficial effects of the present invention: The present invention is a pioneering invention, which provides a decoupling method for protection configuration information of smart substations, by formulating the GOOSE sending data set of the bay layer device as a protection data set with unique name and position of the protection signal according to each circuit breaker bay that needs to trip, unifying the format of the communication parameters of each group of GOOSE and SV data, defining the polarity parameters, reverse polarity channel parameters and bus voltage selection parameters of the receiving data of each group of SV data, so as to realize the artificial configuration of process layer parameters; for the bay layer device that needs station control layer interlocking information, the following steps are also performed: the bay layer When the device is modeled in ICD, it is defined that: the access point of the station control layer data set is S1, and the logical device of the station control layer data set is CTRL or MEAS; for the interval layer device, only the virtual terminal of its station control layer data set is connected to determine the logical interlocking information related to the interval layer device connecting to the station control layer, and determine the received station control layer physical optical port; based on the SCD file of the virtual terminal connection, the station control layer configuration file of the interval layer device is exported, and after the interval layer device downloads the configuration file, the configuration file is parsed by the software of the device to realize the decoupling of the station control layer configuration information and the process layer configuration information in the CCD file. Compared with the existing equipment change and re-downloading of the configuration file, which requires the transmission test of the new and old intervals to be carried out, the present invention only needs to adjust the communication parameters of the relevant process layer device and restart the relevant process layer device when the equipment is changed. While being able to configure the relevant parameters in a timely manner, it is not necessary to carry out the transmission test of the new and old intervals, which reduces the risk of on-site operations to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a flow chart of a decoupling method for protection configuration information of a smart substation; Figure 2 It is a schematic diagram of the format of the communication parameters of each group of GOOSE and SV data after unified processing; Figure 3 It is a schematic diagram of the sender parameters displayed on the LCD menu; Figure 4 It is a schematic diagram of the receiver parameters displayed on the LCD menu; Figure 5 This is a schematic diagram of generating the station control layer configuration file. DETAILED DESCRIPTION

[0021] To solve the problem in the background technology, after manually adjusting the parameters that need to be configured in the process layer, the process layer configuration information in the CCD file is deleted, so as to realize the decoupling of the station control layer configuration information and the process layer configuration information in the CCD file without affecting the configuration of the process layer parameters, so that the device that needs the station control layer interlocking information can re-download the configuration file containing the station control layer parameters after the decoupling and removal of the process layer parameters, while the device that does not need the station control layer interlocking information does not need to download the configuration file, and only needs manual configuration. Compared with the existing equipment change and re-downloading of the configuration file, which leads to the need to carry out transmission tests of the new and old intervals, this method only needs to adjust the communication parameters of the relevant process layer devices and restart the relevant process layer devices when the equipment is changed. While being able to timely configure the relevant parameters, it is possible to choose whether to carry out transmission tests of the new and old intervals according to needs, thereby reducing the risk of on-site operations to a certain extent.

[0022] For ease of understanding, the basic contents of this plan are introduced as follows: The intelligent substation automation system is divided into station control layer, bay layer and process layer according to the IEC61850 standard.

[0023] The station control layer is the highest level of the substation automation system. It is mainly responsible for the overall monitoring, management and control of the substation. It includes core equipment such as monitoring host, data server, telecontrol device, etc. It can summarize the real-time data information of the whole station, refresh the database, and transmit the information to the dispatching and monitoring center. At the same time, it receives the control instructions from the dispatching and monitoring center and turns to the interval layer and process layer for execution.

[0024] The bay layer is a key component in the power system automation structure. It is located between the station control layer and the process layer. It is mainly responsible for the protection and control of the primary equipment and the collection and aggregation of real-time data information of the bay process layer. The bay layer also undertakes the communication task of connecting the upper and lower layers, and completes the network communication with the process layer and station control layer at high speed.

[0025] The process layer is the intelligent device layer in the digital substation (smart substation). As the lowest level of the substation automation system, it is directly connected to the primary equipment and is responsible for real-time electrical quantity detection of power operation, status parameter detection of operating equipment, and operation control execution and drive.

[0026] Among them, the SCD file is the whole station system configuration file in the IEC61850 standard of the substation, which is described in the SCL (Substation Configuration Language) language. This file describes the instance configuration and communication parameters of all intelligent electronic devices (IED, Intelligent Electronic Device) in the substation, the communication configuration between IEDs, and the substation primary system structure. The SCD file is a unified configuration file for the whole station, which is completed by the system integration manufacturer according to the ICD (Intelligent Electronic Device Capability Description) file.

[0027] Among them, CCD file refers to the loop configuration description file (loop description file), which is one of the indispensable configuration files of the intelligent power system. It describes the virtual loop connection relationship between each device, so that each device can complete the reception and transmission of sampling values ​​and status information. CCD file can be exported from SCD file through system configuration tool, which contains logical node type, data type definition, process layer GOOSE output configuration information and process layer SV input configuration information.

[0028] GOOSE stands for Generic Object Oriented Substation Event, which is a generic object-oriented substation event. It is mainly used to realize information transmission between multiple IEDs (intelligent electronic devices), including transmission of tripping and closing signals (commands), etc., with a high probability of successful transmission.

[0029] Among them, the full name of SV is Sampled Values. SV messages mainly contain electrical quantity information such as current and voltage values ​​on the secondary side of the transformer; SV messages play a basic supporting role in smart substations. They provide real-time sampling data for protection and measurement and control equipment, and are an important prerequisite for realizing power system automation and protection functions.

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] An embodiment of a decoupling method for smart substation protection configuration information: A decoupling method for protection configuration information of smart substations, such as Figure 1 As shown, the following steps are included: 1. Split the data set by interval, standardize the name of the sent data set, and standardize the data set members of the same type of equipment in the smart substation, that is, standardize the data set members of the same type of interval layer equipment in the smart substation. This step is Figure 1 It is called the protected dataset.

[0032] The export data sets of the bay layer equipment (bay layer devices) are split, and a data set (protection signal data set) is prepared for each circuit breaker bay that needs to trip. While ensuring full coverage of conventional required signals, the signal positions in the data set are standardized. The meaning of each signal in each data set is clear and non-repetitive, realizing standardized processing of the names and sequences of the process layer equipment data sets.

[0033] The bay layer device export data set refers to the GOOSE sending data set of the bay layer device or the GOOSE sending data set of the protection device.

[0034] The protection signal data set (protection data set) includes the protection action signals required by the conventional substation, and each protection action corresponds to a set of protection signal data sets.

[0035] Each interval has a protection signal data set. The name and position of the protection signal in the protection signal data set of each interval are unique. The order of each field in the protection data set is unified by standardizing the order of the protection data set, and the position of the protection signal is determined by fixing the order of the protection signal.

[0036] 2. Exempt the process layer configuration communication parameter setting. This step is in Figure 1 It is called communication parameter setting.

[0037] 1) For each group of GOOSE and SV data, define the communication parameters (appid) of each group of GOOSE and SV data in the data template, and unify the format of this communication parameter, including name definition, data type, display format, display group, upper limit, lower limit and initial value, etc.

[0038] Among them, GOOSE data and SV data are grouped.

[0039] 2) The setting of the display group of the channel of the communication parameters can make the display group displayed and adjusted on the display menu of the bay layer device. When the communication parameters (appid) of the receiver and the sender are consistent and the physical ports are correctly connected, the communication connection can be achieved.

[0040] 3. Current polarity parameter and voltage channel selection parameter settings: 1) For each group of SV receiving data, define the polarity parameter (polarity), reverse polarity channel parameter (channel) and bus voltage selection parameter (chidmap) in the data template, and define the name, data type, display format, display group, upper limit, lower limit and initial value of these parameters.

[0041] 2) Reverse polarity channel parameters are used to set the current analog channel that needs to be reversed.

[0042] When the polarity parameter is set to 0 (positive polarity parameter), the original received current analog channel data is displayed and logical operations are performed; When the polarity parameter is set to 1 (reverse polarity parameter), the current analog channel data defined by the reverse polarity channel parameter will be displayed after reverse polarity processing and then perform logical operations.

[0043] 3) When the bus voltage is selected for voltage channel: When the bus voltage selects the I bus voltage channel (chidmap0), the bus voltage takes the data of the I bus voltage channel (channel 1-8) for logical calculation; When the bus voltage selects the II bus voltage channel (chidmap1), the bus voltage takes the data of the II bus voltage channel (channels 12-19) for logical calculation; When the bus voltage is selected as the III bus voltage channel (chidmap2), the bus voltage takes the data of the III bus voltage channel (channels 23-30) for logical calculation.

[0044] 4) To avoid missetting, all parameters of each group of SV receiving data can be opened or blocked.

[0045] When reverse polarity processing is required, the polarity parameter (polarity) and reverse polarity channel parameter (channel) of each group of SV receiving data are opened, otherwise the polarity parameter (polarity) and reverse polarity channel parameter (channel) of each group of SV receiving data are shielded; when voltage channel selection is required, the bus voltage selection parameter (chidmap) is opened, otherwise the bus voltage selection parameter (chidmap) is shielded.

[0046] 5) All parameters of each set of SV data are set in display groups in the data template so that all parameters of each set of SV data can be displayed and adjusted on the display menu of the bay layer device.

[0047] 4. For the bay layer devices that require station control layer interlocking information, decouple the process layer configuration file from the station control layer configuration file in the CCD configuration file to generate a station control layer configuration file. Figure 1 It is referred to as generating the station control layer configuration file and the exempted process layer configuration file according to the needs of the bay layer device.

[0048] 1) When the bay layer device is modeled in ICD, it is defined as follows: the access point of the station control layer data set is S1, and the logical device is CTRL or MEAS; the access point of the process layer data set is G1; the station control layer data set and the process layer data set are independent.

[0049] 2) For the bay layer device that requires station control layer interlocking information, only connect the virtual terminal of the station control layer data set of the bay layer device, connect the logical interlocking information related to the station control layer, and determine the receiving station control layer physical optical port.

[0050] Among them, the interval layer devices that require station control layer interlocking information include measurement and control devices or integrated protection and measurement devices.

[0051] Among them, the physical optical port of the station control layer includes a receiving optical port and a sending optical port.

[0052] Among them, only the virtual terminal of the station control layer data set of the bay layer device is connected to determine the logical interlocking information related to the station control layer connected to the bay layer device and the received station control layer physical optical port.

[0053] 3) Based on the SCD file of the virtual terminal connection, export the station control layer configuration file of the bay layer device.

[0054] The GOOSEPUB of the station control layer configuration file only contains the relevant information sent by the station control layer GOOSE. The access point of the station control layer of GOOSEPUB is S1 (apName="S1"), and the sending optical port is the physical port of the station control layer.

[0055] The GOOSESUB of the station control layer configuration file only contains the relevant information received by the station control layer GOOSE. The access point of the station control layer of GOOSESUB is S1 (apName="S1"), and the receiving optical port is the physical port of the station control layer; the relevant information received by GOOSE includes the logical interlocking double-point information connecting the virtual terminals.

[0056] 4) After the station control layer configuration file is downloaded to the spacer layer device, the station control layer configuration file is parsed through the software platform of the spacer layer device.

[0057] When parsing the station control layer configuration file, only the access point of the control block in GOOSEPUB and GOOSESUB is S1 (apName="S1") and the logical device is CTRL (ldInst="CTRL") or MEAS (ldInst="MEAS") is parsed, and only the station control layer GOOSE reception is judged as broken link, and the receiving logic interlocking double-point information is opened.

[0058] 5. For devices that do not require station control layer interlocking information, there is no need to download configuration files. Virtual terminal connections and communication matching are automatically generated through internal preset strategies based on the device model.

[0059] The above method can be used to eliminate the need for process layer configuration files, thereby solving the problem of increased grid operation risks due to frequent configuration file changes, as well as the problem of configuration work relying on manufacturers and seriously weakening independent control.

[0060] The present invention standardizes members of data sets of various types of equipment, enables communication parameters, current polarity and voltage channel selection to be adjustable, decouples station control layer configuration files and process layer configuration files, and other methods to achieve normal communication of the process layer without relying on the configuration files, thereby solving the problems of frequent changes in configuration files, increased on-site work burden and power grid operation risks, weakened autonomy of maintenance and debugging, and the inability of intelligent operation and maintenance to be independent.

[0061] By sending a data set to the protection device GOOSE, a data set is prepared according to the circuit breaker interval that needs to trip, as shown in Table 1 below. The data set contains the action signals required by the conventional station. A set of signal data sets is prepared for each protection, and the signal names are standardized.

[0062] Table 1 order Protected Dataset Signal Name Protection signal dataset 1 Tripping Protection Action 2 Failure to start Overload 3 Locking and closing (locking and automatic closing) 4 Closing like Figure 2 As shown, a unified data template is used to edit the name, display group, data type, upper and lower limits, and initial value of each group of SV and GOOSE data.

[0063] like Figure 3 and Figure 4 As shown, the communication parameters, current polarity, voltage selection and other parameters of each group of SV and GOOSE are adjusted through the LCD menu to achieve normal communication between the sender and the receiver, as well as the correct selection of voltage channel and current polarity.

[0064] like Figure 5 As shown, according to the characteristics of the station control layer data set, a station control layer configuration file is generated to realize the reception of the station control layer logical interlocking information.

Claims

1. A decoupling method for protection configuration information of a smart substation, characterized in that: include: The GOOSE data set sent to the bay layer device is formulated as a unique protection data set with the name and position of the protection signal according to each circuit breaker bay that needs to trip; Unify the format of communication parameters for each set of GOOSE and SV data; Define the polarity parameters, reverse polarity channel parameters and bus voltage selection parameters of each set of SV data; For bay layer devices that require station control layer interlocking information, the following steps are also performed: When the bay layer device is modeled in ICD, it is defined as follows: the access point of the station control layer data set is S1, and the logical device of the station control layer data set is CTRL or MEAS; For bay layer devices, only the virtual terminals of the station control layer data set are connected; Based on the SCD file of the virtual terminal connection, the station control layer configuration file of the bay layer device is exported, and after the bay layer device downloads the configuration file, the configuration file is parsed by the software of the device.

2. The decoupling method for protection configuration information of smart substation according to claim 1, characterized in that: When the polarity parameter is set to a positive polarity parameter, the current analog channel data originally received is displayed and a logical operation is performed; When the polarity parameter is set to a reverse polarity parameter, the current analog channel data defined by the reverse polarity channel parameter is subjected to reverse polarity processing and then displayed and subjected to logic operation.

3. The decoupling method for protection configuration information of smart substation according to claim 2, characterized in that: Also includes: When reverse polarity processing is required, the polarity parameters and reverse polarity channel parameters of each group of SV receiving data are opened, otherwise the polarity parameters and reverse polarity channel parameters of each group of SV receiving data are shielded.

4. The decoupling method for protection configuration information of a smart substation according to claim 1, characterized in that: The definition of the bus voltage selection parameter includes the selection of the voltage channel for the bus voltage: when the bus voltage selects the I bus voltage channel, the II bus voltage channel or the III bus voltage channel, the bus voltage takes the data of the corresponding I bus voltage channel, the II bus voltage channel or the III bus voltage channel for logical calculation.

5. The decoupling method for protection configuration information of smart substation according to claim 4, characterized in that: Also includes: When voltage channel selection is required, the bus voltage selection parameter is open, otherwise the bus voltage selection parameter is shielded.

6. The decoupling method for protection configuration information of smart substation according to claim 1, characterized in that: The GOOSEPUB of the station control layer configuration file only contains relevant information sent by the station control layer GOOSE, the access point of the station control layer is S1, and the sending optical port is the physical port of the station control layer.

7. The decoupling method for protection configuration information of smart substation according to claim 1, characterized in that: The GOOSESUB of the station control layer configuration file only contains the relevant information received by the station control layer GOOSE, the access point of the station control layer is S1, and the receiving optical port is the physical port of the station control layer; the relevant information received by GOOSE includes the logical interlocking double-point information connecting the virtual terminals.

8. The decoupling method for protection configuration information of a smart substation according to claim 1, characterized in that: The interval layer device requiring station control layer interlocking information includes a measurement and control device or a security and measurement integrated device.

9. The decoupling method for protection configuration information of a smart substation according to claim 1, characterized in that: The analysis includes: only analyzing the content of the control block in GOOSEPUB and GOOSESUB whose access point is S1 and whose logical device is CTRL or MEAS, only performing link break judgment on the station control layer GOOSE reception, and receiving the logic interlocking double-point information input.

10. The decoupling method for protection configuration information of a smart substation according to claim 1, characterized in that: All parameters of each group of SV data are set in display groups in the data template so that they can be displayed and adjusted on the display menu of the bay layer device; the communication parameters are displayed and adjusted on the display menu of the bay layer device.

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