CN110489729B - Automatic conversion method and system for D5000-matpower grid multi-disaster coupling cascading failure model - Google Patents

Abstract

The invention discloses an automatic conversion method of a D5000-matpower power grid multi-disaster coupling cascading fault model, comprising: obtaining first data from the D5000 system; obtaining second data from a relay protection setting calculation system; converting the first data to Transform the transformer model of the transmission line model into the transmission line model; take the capacity of the transformer in the first data as the limit current carrying capacity of the transmission line in the transmission line model, and update it to the first data; judge the component name in the second data and the first Whether the component names in the data match; from the first data, select the parameters required to describe the primary model and the secondary model of matpower as member variables, and establish the primary model and the secondary model respectively; obtain the power grid component failure under the multi-hazard coupling condition Set and the probability of each fault in the set, determine the parameters required to describe each fault in the grid component fault set as member variables, and obtain the multi-disaster coupling cascading fault model of the power grid. The invention improves the efficiency and accuracy of model generation.

Description

Automatic conversion of multi-hazard coupling cascading failure model of power grid with D5000-matpower method and system

technical field

The invention relates to the field of power system analysis and control, in particular to an automatic conversion method and system for a D5000-matpower grid multi-disaster coupling cascading failure model.

Background technique

With the frequent occurrence of power grid disasters, people's requirements for power supply reliability, transient process simulation precision, and real-time performance have been continuously improved, and the demand for power grid risk analysis under multi-disaster coupling conditions has become more and more urgent. D5000 is currently widely used power grid status information collection software, which can provide real-time data for power grid risk analysis. matpower software is a widely used power grid structure planning software, which can carry out power flow analysis, transient stability calculation and other functions, and its feature is that it can customize the development function.

The D5000 system is established by the control departments of various network provincial companies, with cumbersome data and complicated operation, and the system development unit specially develops functions and specifications according to the actual grid structure (such as whether there is a DC line, SVG, etc.) and usage specifications of each network provincial company. Data structures, expensive. Moreover, there is a possibility of key data leakage, and units outside the grid system cannot use the system. The E-format file generated by the export is synthesized from the grid data of various grid companies, and can contain millions of components. Matpower software is open source, and can carry out simulation analysis such as power flow calculation, electromagnetic transient simulation, and cascading fault analysis. It has powerful functions, fast calculation speed, simple operation, and is widely used.

At present, in the research process using matpower as a tool, the standard case files of 118 nodes and 2383 nodes provided by developers are used, and there is no simulation analysis example for China's actual power grid. The data of power flow calculation, electromechanical transient state, electromagnetic transient state and cascading fault analysis are complex. If you want to use matpower to simulate and analyze the data of China's actual power grid, it generally requires experienced professionals to process and input data component by component. This is a Complicated and heavy work. What's more serious is that, limited to the scale of software simulation and simulation objects, models of different complexity need to be built for different problems, which undoubtedly increases the difficulty of modeling, making the conversion process extremely error-prone and difficult to check, which affects the simulation construction. model efficiency. At the same time, the existing methods fail to consider the action characteristics of relay protection and the real-time development and spread of external disaster environments (such as wildfires, external disasters, and ice disasters), and cannot provide a data basis for real-time analysis of power grid risks.

Contents of the invention

The present invention provides an automatic conversion method of multi-disaster coupled cascading failure models of the power grid, which is used to solve the problem of lack of required parameters in the current analysis of actual power grid data using matpower simulation, and requires experienced professionals to perform data processing and component-by-component data processing. input, and the modeling process is complicated and heavy, the modeling is error-prone, and the technical problems are difficult to inspect.

In order to solve the problems of the technologies described above, the technical solution proposed by the present invention is:

An automatic conversion method of a D5000-matpower power grid multi-disaster coupling cascading failure model, comprising the following steps:

Obtain the first data from the D5000 system; obtain the second data from the relay protection setting calculation system;

Based on the first data, the transformer model of the first data is converted into a transmission line model; the capacity of the transformer in the first data is taken as the limit current carrying capacity of the transmission line in the transmission line model, and updated in the first data;

Determine whether the component name in the second data matches the component name in the first data, and keep the component name and parameters in the first data if they do not match; when they match, take the parameter corresponding to the component name in the second data to replace the first The corresponding parameters in the data;

From the first data, select the parameters required to describe the primary model and the secondary model of matpower as member variables, and establish the primary model and the secondary model respectively;

Obtain the power grid component fault set and the probability of each fault in the set under the multi-hazard coupling condition, determine the parameters required to describe each fault in the power grid component fault set as member variables, and establish a power grid based on the primary model and the secondary model Multi-hazard coupled cascading failure model.

Preferably, it also includes collecting the relay protection settings of the transformer and the transmission line from the relay protection setting management system or the fault information management system; updating the relay protection settings of the transformer and the transmission line into the first data;

Before judging whether the component name in the second data matches the component name and parameters in the first data, the method also includes: reading the primary data of the power grid and the secondary data of the power grid, the primary data of the power grid includes the first data and the second data, and the power grid Secondary data includes relay protection settings for transformers and transmission lines;

The relay protection setting value includes the relay protection setting value of each transmission line, and the relay protection setting value includes: distance protection, current protection, temperature protection and voltage protection.

Preferably, the power grid component fault set under the multi-hazard coupling condition is obtained from one or more of the following systems: transmission line wildfire forecasting system, transmission line wildfire monitoring, ice disaster online monitoring system, ice coverage forecasting system or external force sabotage the monitoring system;

The grid element fault set includes: threatened line name, threatened time interval and trip probability of corresponding time node in the threatened time interval.

Preferably, the first data includes: grid topology data, transmission line parameters, transformer parameters, and load parameters; the second data includes: grid topology data, transmission line parameters, transformer parameters, and load parameters; the transmission line parameters in the second data Parameters also include: line length.

Preferably, when establishing a primary model, a secondary model and/or a grid multi-disaster coupled cascading failure model, including calling a write function to write the topology data of the grid into the matpower file;

The required member variables of the matpower primary model include: generator parameters, transmission line parameters, bus parameters, and transformer parameters; the member variables of the primary model are substation parameters, bus parameters, capacitor parameters, reactor parameters, generator parameters, load parameters, etc. The parameter type of the component.

The required member variables of the matpower quadratic model include: protection device parameters corresponding to generators, transmission lines, busbars and transformers, specifically including overcurrent protection settings, low voltage protection settings, underfrequency protection settings, and impedance protection settings.

Preferably, the topology data of the grid includes: substation parameters, bus parameters, capacitor parameters, reactor parameters, generator parameters and load parameters;

Among them, substation parameters include: serial number, station name, voltage level and station type;

Bus parameters include: bus name, voltage level, topological node, voltage, phase angle, outage flag and calculation node;

Capacitor parameters include name, voltage level, rated capacity, rated voltage, connection location, topological node, active power, reactive power, outage flag, and computing node;

Reactor parameters include name, voltage level, rated capacity, rated voltage, connection location, topological node, active power, reactive power, outage flag, and computing node;

Generator parameters include: generator name, equivalent generator logo, equivalent position, rated voltage, rated capacity, voltage level connected to the grid, topological node, active power, reactive power, machine terminal voltage, machine terminal voltage phase angle, outage flag, active power upper limit, active power lower limit, reactive power upper limit, reactive power lower limit, rated power factor, and computing nodes.

Preferably, the transformer parameters include: transformer name, winding type, high-voltage terminal voltage level, medium-voltage terminal voltage level, low-voltage terminal voltage level, high-voltage terminal rated capacity, medium-voltage terminal rated capacity, low-voltage terminal rated capacity, high-voltage terminal tap max. Gear position, the lowest gear position of the high-voltage end tap, the rated gear position of the high-voltage end tap, the differential level of the high-voltage end tap, the rated voltage of the high-voltage end, the highest gear position of the medium-voltage end tap, the lowest gear of the medium-voltage end tap, medium voltage End tap rated gear, medium voltage end tap differential, medium voltage end rated voltage, low voltage end rated voltage, high voltage winding resistance, high voltage winding reactance, medium voltage winding resistance, medium voltage winding reactance, low voltage winding resistance, low voltage winding reactance , the topological node where the high-voltage side is located, the topological node where the medium-voltage side is located, the topological node where the low-voltage side is located, the disconnection mark of the high-voltage side, the disconnection mark of the medium-voltage side, the disconnection mark of the low-voltage side, the computing node of the high-voltage side, the computing node of the medium-voltage side, Low-voltage computing node, high-voltage winding reactance standard unit value, medium-voltage winding resistance standard unit value, medium-voltage winding reactance standard unit value, low-voltage winding resistance standard unit value, low-voltage winding reactance standard unit value;

Transmission line parameters include AC transmission line parameters, AC transmission line parameters include: AC line name, voltage level, equivalent line sign, line resistance, line reactance, line single-ended susceptance, topological node where I end is located, and topological node where J end is located , I-terminal breaking sign, J-terminal breaking sign, allowable ampacity, I-terminal electrical island number, J-terminal electrical island number, line resistance per unit value, line reactance per unit value and line single-end susceptance per unit value;

Load parameters include: load name, voltage level, equivalent load symbol, equivalent connection location, topological node, active power, reactive power, outage symbol, and computing node.

Preferably, converting the transformer parameters of the first data into transmission lines includes: converting two transformers into one transmission line, and/or converting three transformers into three transmission lines.

Preferably, from the E format file in the D5000 system according to the first cycle, the following steps are included:

Read the substation data card to obtain the collection of substations;

Read the bus data card to obtain the bus class collection;

Read the ACline data card to obtain the collection of AC lines;

Read the DCline data card to obtain the collection of DC lines;

Read the transformer data card to obtain the transformer class collection;

Read the unit data card to obtain the motor class collection;

Read the Compensator_P and Compensator_S data cards to obtain the collection of capacitors and reactors;

Analyzing the E format file to obtain the first data of the power grid includes generating the topology data of the power grid according to the E format file, including the following steps:

Determine whether the name of the bus element A is consistent with the topological node attribute of the I end of the AC line or the DC line element B or the topological node where the J end is located. If they are consistent, then the I end or J end of B is connected to the bus A;

Determine whether the name of the bus element A is consistent with the topological node attribute of the I terminal of the second-volume transformer element C or the topological node of the J terminal. If they are consistent, the I terminal or J terminal of C is connected to the bus A;

Determine whether the name of the bus element A is consistent with the topological node where the high-voltage end, the medium-voltage end, or the low-voltage end of the three-volume transformer element D is located. If they are consistent, the corresponding high-voltage end, medium-voltage end, or low-voltage end of element D Connect bus A;

Determine whether the name of the bus element A is consistent with the name of the topological node where the generator element E is located. If they are consistent, the outlet end of E is connected to the bus A;

Determine whether the name of the bus element A is consistent with the name of the topological node where the capacitor or reactor element F is located, and if they are consistent, then F is connected to the bus A;

Number each component to form the topology data of the power grid.

The present invention also provides a computer system, including a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the steps of any of the above-mentioned methods are realized.

The present invention has the following beneficial effects:

The automatic conversion method of the D5000-matpower grid multi-disaster coupling cascading failure model of the present invention obtains the equipment parameters of the grid on the basis of analyzing the E-format data of D5000, and realizes the topological parameters of the grid of the matpower file through data conversion Value assignment; realize the automatic conversion of the multi-disaster coupled cascading failure model of the power grid, and provide a data basis for the risk analysis of the cascading failure of the power grid. This method can avoid the disadvantages of manual matpower modeling, which is a heavy work of parameter conversion and input, and simulation parameter errors are difficult to inspect, improves the efficiency and accuracy of model generation, and can improve the efficiency of electromagnetic transient simulation modeling and credibility.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a schematic flow chart of the automatic conversion method of the D5000-matpower grid multi-disaster coupling cascading failure model of the preferred embodiment of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

The E language referred to in the present embodiment is ICS 35.040 State Grid Corporation Enterprise Standard Q/GDW 215-2008 Power System Data Markup Language;

The relay protection setting calculation system referred to in this embodiment is the operation and maintenance management of the relay protection department of the provincial power grid company, regional power grid company or headquarters control center. This department is not only the centralized department of the relay protection setting calculation system data but also the use department. Since the data of the D5000 system is collected from on-site equipment, it is easily affected by factors such as equipment reliability, network availability, and human maintenance, and its accuracy is poorer than that of the relay protection setting calculation system. The fault information management system is the operation and maintenance management of the relay protection department of the provincial power grid company, regional power grid company or headquarters control center. Through this system, the fixed value of the on-site relay protection device can be read, so that compared with the relay protection setting calculation The value of the system is more accurate. But not all on-site protection setting values can be collected and read, therefore, the setting value of the fault information management system can only be used as a check of the setting value of the relay protection setting calculation system.

The automatic conversion method of the D5000-matpower power grid multi-disaster coupling cascading failure model of this embodiment includes the following steps:

Obtain the first data from the D5000 system; obtain the second data from the relay protection setting calculation system;

Based on the first data, the transformer model of the first data is converted into a transmission line model; the capacity of the transformer in the first data is taken as the limit current carrying capacity of the transmission line in the transmission line model, and updated in the first data;

Determine whether the component name in the second data matches the component name in the first data, and keep the component name and parameters in the first data if they do not match; when they match, take the parameter corresponding to the component name in the second data to replace the first The corresponding parameters in the data;

From the first data, select the parameters required to describe the primary model and the secondary model of matpower as member variables, and establish the primary model and the secondary model respectively;

Obtain the power grid component fault set and the probability of each fault in the set under the multi-hazard coupling condition, determine the parameters required to describe each fault in the power grid component fault set as member variables, and establish a power grid based on the primary model and the secondary model Multi-hazard coupled cascading failure model.

On the basis of analyzing the E-format data of D5000, the equipment parameters of the power grid are obtained, and the topological parameter assignment of the power grid in the matpower file is realized through data conversion; the automatic conversion of the multi-disaster coupling cascading failure model of the power grid is realized, and cascading failures of the power grid are realized. Risk analysis provides the data basis.

In actual implementation, the above methods can also be expanded or applied as follows, and the technical features in the following embodiments can be combined with each other, and the embodiments are only examples, and are not intended to limit the normal combination of technical features.

Example 1:

The automatic conversion method of the D5000-matpower power grid multi-disaster coupling cascading failure model of this embodiment includes the following steps:

S1: From the E format file in the D5000 system according to the first cycle; the first cycle is 5-15 minutes. From the E-format file in the D5000 system in the first cycle, the following steps are included:

Read the substation data card to obtain the collection of substations;

Read the bus data card to obtain the bus class collection;

Read the ACline data card to obtain the collection of AC lines;

Read the DCline data card to obtain the collection of DC lines;

Read the transformer data card to obtain the transformer class collection;

Read the unit data card to obtain the motor class collection;

Read the Compensator_P and Compensator_S data cards to obtain the collection of capacitors and reactors.

The above seven types of data cards are converted from the data cards in the D5000 or BPA system. The first data of the power grid is analyzed from the data card. A data card corresponds to a type of data in the first data, which specifically includes substations, busbars, AC lines, DC lines, transformers, motors, capacitors, Component types such as reactors.

It is also possible to collect relay protection fixed values of transformers and transmission lines from the relay protection fixed value management system or fault information management system according to the second cycle; update the relay protection fixed values of transformers and transmission lines to the first data; The second cycle is 1 day to 5 days. The relay protection setting value includes the relay protection setting value of each transmission line, and the relay protection setting value includes: distance protection, current protection, temperature protection and voltage protection.

S2: Analyzing the E-format file to obtain the first data of the power grid. The first data includes: grid topology data, transmission line parameters, transformer parameters and load parameters. Among them, the topology data of the grid includes: substation parameters, bus parameters, capacitor parameters, reactor parameters, generator parameters and load parameters;

Among them, substation parameters include: serial number, station name, voltage level and station type;

Bus parameters include: bus name, voltage level, topological node, voltage, phase angle, outage flag and calculation node;

Capacitor parameters include name, voltage level, rated capacity, rated voltage, connection location, topological node, active power, reactive power, outage flag, and computing node;

Reactor parameters include name, voltage level, rated capacity, rated voltage, connection location, topological node, active power, reactive power, outage flag, and computing node;

Generator parameters include: generator name, equivalent generator logo, equivalent position, rated voltage, rated capacity, voltage level connected to the grid, topological node, active power, reactive power, machine terminal voltage, machine terminal voltage phase angle, outage flag, active power upper limit, active power lower limit, reactive power upper limit, reactive power lower limit, rated power factor, and computing nodes.

Transformer parameters include: transformer name, winding type, high-voltage end voltage level, medium-voltage end voltage level, low-voltage end voltage level, high-voltage end rated capacity, medium-voltage end rated capacity, low-voltage end rated capacity, high-voltage end tap highest gear position, The lowest gear position of the high-voltage end tap, the rated gear position of the high-voltage end tap, the differential level of the high-voltage end tap, the rated voltage of the high-voltage end, the highest gear position of the medium-voltage end tap, the lowest gear of the medium-voltage end tap, and the medium-voltage end tap Rated gear, tap differential at medium voltage end, rated voltage at medium voltage end, rated voltage at low voltage end, high voltage winding resistance, high voltage winding reactance, medium voltage winding resistance, medium voltage winding reactance, low voltage winding resistance, low voltage winding reactance, high voltage end The topology node where the medium voltage side is located, the topology node where the low voltage side is located, the high voltage side disconnection flag, the medium voltage side disconnection flag, the low voltage side disconnection flag, the high voltage side calculation node, the medium voltage side calculation node, the low voltage side calculation Node, high voltage winding reactance standard value, medium voltage winding resistance standard value, medium voltage winding reactance standard value, low voltage winding resistance standard value, low voltage winding reactance standard value;

Transmission line parameters include AC transmission line parameters, AC transmission line parameters include: AC line name, voltage level, equivalent line sign, line resistance, line reactance, line single-ended susceptance, topological node where I end is located, and topological node where J end is located , I-terminal breaking sign, J-terminal breaking sign, allowable ampacity, I-terminal electrical island number, J-terminal electrical island number, line resistance per unit value, line reactance per unit value and line single-end susceptance per unit value;

Load parameters include: load name, voltage level, equivalent load symbol, equivalent connection location, topological node, active power, reactive power, outage symbol, and computing node.

The above-mentioned analysis of the E format file to obtain the first data of the power grid includes generating the topology data of the power grid according to the E format file, including the following steps:

Determine whether the name of the bus element A is consistent with the topological node attribute of the I end of the AC line or the DC line element B or the topological node where the J end is located. If they are consistent, then the I end or J end of B is connected to the bus A;

Determine whether the name of the bus element A is consistent with the topological node attribute of the I terminal of the second-volume transformer element C or the topological node of the J terminal. If they are consistent, the I terminal or J terminal of C is connected to the bus A;

Determine whether the name of the bus element A is consistent with the topological node where the high-voltage end, the medium-voltage end, or the low-voltage end of the three-volume transformer element D is located. If they are consistent, the corresponding high-voltage end, medium-voltage end, or low-voltage end of element D Connect bus A;

Determine whether the name of the bus element A is consistent with the name of the topological node where the generator element E is located. If they are consistent, the outlet end of E is connected to the bus A;

Determine whether the name of the bus element A is consistent with the name of the topological node where the capacitor or reactor element F is located, and if they are consistent, then F is connected to the bus A;

Number each component to form the topology data of the power grid.

Through the above analysis steps, it is to determine the topological structure of the power grid according to the connection relationship between the busbar components and the transmission lines, transformers, capacitors, reactors, generators and other components. For example, bus: Yuntian substation 500 kV I bus number is 5539, Tuanshan substation 500 kV II bus number is 5860, the bus number connected to terminal I of Yuntuan line is 5539, and the bus number connected to J terminal is 5870, then It can be seen that the I end of the Yuntuan line is connected to the 500 kV I bus of the Yuntian substation, and the J end is not connected to the 500 kV II bus of the Tuanshan substation.

S3: Read the second data in the relay protection setting calculation system, the second data includes: grid topology data, transmission line parameters, transformer parameters, load parameters and line length.

S4: converting the transformer parameters of the first data into transmission lines; including: converting two transformers into one transmission line, and/or converting three transformers into three transmission lines.

S5: Obtain the allowable ampacity attribute value (capacity of the transformer) of each transmission line in the transformer parameter in the second data, and use the allowable ampacity attribute value as the limit ampacity of the transmission line in the transmission line model, update to the transmission line parameters of the first data;

S6: from the first data, select the parameters required by each element to describe the matpower primary model as member variables, set up a primary model, call the write function to write the data of the parameters into the matpower file; the required members of the matpower primary model Variables include: generator parameters, transmission line parameters, bus parameters, and transformer parameters. The member variables of the primary model are the parameter types of components such as substation parameters, bus parameters, capacitor parameters, reactor parameters, generator parameters, and load parameters.

S7: read the grid primary data and the grid secondary data, the grid primary data includes the first data and the second data, the grid secondary data includes the relay protection fixed value of the transformer and the transmission line, and judges the second Whether the component name in the data matches the component name in the first data, if it does not match, keep the component name and parameters in the first data, if it matches, take the content of the second data to replace the corresponding content in the first data, take The parameter corresponding to the component name of the second data replaces the corresponding parameter in the first data. The parameters in the relay protection setting calculation system are more accurate than those in the D5000 system. This kind of name comparison is used to mutually confirm the value of the data to ensure the accuracy of the grid data.

S8: According to the requirements of the matpower file, determine the member variables required by each component to describe the matpower quadratic model and the member functions for data processing; call the write function to write the topology data of the power grid into the matpower file. The required member variables of the matpower quadratic model include: protection device parameters corresponding to generators, transmission lines, busbars and transformers, specifically including overcurrent protection settings, low voltage protection settings, underfrequency protection settings, and impedance protection settings.

S9: According to the transmission line mountain fire forecasting system, transmission line mountain fire monitoring, ice disaster online monitoring system, icing forecast system or external force damage monitoring system, a power grid component fault set under multi-disaster coupling conditions is formed; the power grid component fault set Including: the threatened line name, the threatened time interval and the trip probability of the corresponding time node in the threatened time interval;

S10: According to the requirements of the matpower file, determine the member variables required for each fault description and the member functions for data processing. The data required for multi-hazard coupling chain calculation include two categories: grid ontology data and grid operation external environment data. The main data of the power grid is the primary data and secondary data of the power grid. The primary data of the power grid refers to the parameters of components such as substations, busbars, transformers, transmission lines, capacitors, reactors, generators, and loads; the secondary data of the power grid refers to the parameters in the The protection setting of the above components (except the substation); the generation and conversion of the two types of data do not affect each other. The external environmental data of power grid operation, that is, the parameters of the power grid components threatened by external disasters and the degree of threat, are used to provide input data for power grid simulation.

S11: call the write function in the member function to write the grid topology data into the matpower file.

In the above steps, the order of the steps can be adjusted as needed, and S1-S11 does not represent a limitation on the order of the steps.

Example 2:

This embodiment is the automatic conversion system of the power grid multi-disaster coupling cascading failure model corresponding to Embodiment 1. The automatic conversion system of the D5000-matpower power grid multi-disaster coupling cascading failure model in this embodiment includes:

The data parameter acquisition module is used to obtain the file described in E language (electric power system data markup language) by the national grid smart grid dispatching technical support system D5000 by ftp every 5 minutes. The file should include: transformer parameters, AC transmission lines , DC transmission lines, load parameters, substations, busbars, capacitors, inductors and other parameters in the topology data of the power grid.

The data parameter acquisition module is also used to automatically call the on-site setting value collection transformer and the relay protection device setting value of the transmission line to the database every day, and generate an xml file and transmit it to the designated folder of the server;

The primary and secondary system conversion module of the power grid is used to obtain the parameters of the primary system of the power grid. The steps are as follows:

Analyze the E format file to analyze and obtain the topology data, line parameters, transformer parameters and load data of the power grid;

Read the topology data, line parameters, transformer parameters and load parameters of the power grid of the relay protection setting calculation system;

Convert the transformer in the topology parameters of the power grid to a transmission line, where two transformers are converted into one transmission line, and three transformers are converted into three transmission lines;

Obtain the allowable ampacity attribute value of each transmission line (including DC transmission line and AC transmission line) in the D5000 system, and set the allowable ampacity attribute value to the limit capacity of the transmission line;

According to the format requirements of the matpower simulation file ".m", write the member variables required by each component to describe the matpower primary model and the member functions for data processing;

The heterogeneous information system data matching module reads the primary/secondary data of the power grid, judges the matching of the component names and parameters in the relay protection setting calculation system and the component names and parameters in the D5000 system, and ensures the grid topology parameters and secondary protection. The data is complete and reliable;

According to the format requirements of the matpower simulation file ".m", write the member variables required by each component to describe the matpower quadratic model and the member functions for data processing;

Call the member function matpower_Write in each category to write the character string into the .m file.

Obtain the grid component fault set under the multi-disaster coupling condition, determine the parameters required to describe each fault in the grid component fault set as member variables, and write the required parameters for each fault description according to the format requirements of the matpower simulation file ".m" The member variables and member functions for data processing are used to obtain the multi-disaster coupling cascading failure model of the power grid.

Among them, the matching methods in the D5000 system, the relay protection setting calculation system and the fixed value calling system adopt the published general method.

This embodiment obtains device parameters on the basis of parsing the E-format data of D5000, and realizes the assignment of topological parameters in files in ". It realizes the automatic conversion of the multi-disaster coupling cascading failure model of the power grid, and provides a data basis for the risk analysis of the cascading failure of the power grid. This method can avoid the heavy work of manual parameter conversion and input for matpower modeling and the disadvantages of difficult inspection of simulation parameter errors, and improves the efficiency and accuracy of model generation.

Example 3:

The present invention also provides a computer system, including a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the steps in any of the above embodiments are realized.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. an automatic conversion method of the power grid multi-disaster coupling cascading failure model of D5000-matpower, is characterized in that, comprises the following steps: Obtain the first data from the D5000 system; obtain the second data from the relay protection setting calculation system; Based on the first data, the transformer model of the first data is converted into a transmission line model; the capacity of the transformer in the first data is taken as the limit current carrying capacity of the transmission line in the transmission line model, and updated to the first in a data; Determine whether the component name in the second data matches the component name in the first data, and keep the component name and parameters in the first data when they do not match; when they match, take the parameter corresponding to the component name in the second data to replace the The corresponding parameter in the first data; From the first data, select the parameters required to describe the primary model and the secondary model of matpower as member variables, and establish the primary model and the secondary model respectively; Obtain the power grid component fault set and the probability of each fault in the set under the multi-hazard coupling condition, and determine the parameters required to describe each fault in the grid component fault set as member variables, based on the primary model and the secondary model On the above, the power grid multi-hazard coupling cascading failure model is obtained. 2. The automatic conversion method of the grid multi-disaster coupling cascading fault model of D5000-matpower according to claim 1, is characterized in that, also comprises, collects transformer and transmission from relay protection fixed value management system or fault information management system The relay protection setting value of the line; updating the relay protection setting value of the transformer and the transmission line into the first data; Before judging whether the component name in the second data matches the component name and parameters in the first data, the method further includes: reading the primary grid data and the secondary grid data, the primary grid data including the first data And the second data, the secondary data of the power grid includes the relay protection setting value of the transformer and the transmission line; The relay protection setting value includes the relay protection setting value of each transmission line, and the relay protection setting value includes: distance protection, current protection, temperature protection and voltage protection. 3. the automatic conversion method of the grid multi-disaster coupling cascading failure model of D5000-matpower according to claim 1, it is characterized in that, the power grid component failure set under the multi-disaster coupling condition is from the following one or more Obtained in the system: transmission line mountain fire forecasting system, transmission line mountain fire monitoring, ice disaster online monitoring system, icing forecast system or external force damage monitoring system; The grid component fault set includes: threatened line names, threatened time intervals, and tripping probabilities of corresponding time nodes within the threatened time intervals. 4. The automatic conversion method of the grid multi-disaster coupling cascading failure model of D5000-matpower according to claim 1, characterized in that, the first data includes: topology data of the grid, transmission line parameters, transformer parameters and load parameters; the second data includes: grid topology data, transmission line parameters, transformer parameters and load parameters; the transmission line parameters in the second data also include: line length. 5. the automatic conversion method of the multi-disaster coupling cascading failure model of the grid of D5000-matpower according to claim 4, is characterized in that, described establishment primary model, secondary model and/or grid multi-disaster coupling cascading failure model , including calling the write function to write the topology data of the power grid into the matpower file; The required member variables of the matpower primary model include: generator parameters, transmission line parameters, bus parameters and transformer parameters; The required member variables of the matpower secondary model include: protection device parameters corresponding to generators, transmission lines, busbars, and transformers, specifically including overcurrent protection settings, low-voltage protection settings, low-frequency protection settings, and impedance protection settings. value. 6. according to claim 4 or 5 described D5000-matpower the automatic conversion method of multi-disaster coupling cascading fault model of electric network, it is characterized in that, the topological data of described electric network comprises: substation parameter, busbar parameter, capacitor parameter, reactance parameters, generator parameters and load parameters; Wherein, the substation parameters include: serial number, station name, voltage level and station type; The bus parameters include: bus name, voltage level, topological node, voltage, phase angle, outage flag and computing node; The capacitor parameters include name, voltage level, rated capacity, rated voltage, connection location, topological node, active power, reactive power, outage flag and computing node; The reactor parameters include name, voltage level, rated capacity, rated voltage, connection location, topological node, active power, reactive power, outage flag, and computing node; The generator parameters include: generator name, equivalent generator logo, equivalent position, rated voltage, rated capacity, voltage level connected to the power grid, topological node where it is located, active power, reactive power, generator terminal voltage, generator terminal Voltage phase angle, outage flag, active power upper limit, active power lower limit, reactive power upper limit, reactive power lower limit, rated power factor and computing nodes. 7. according to claim 4 or 5 described D5000-matpower the automatic conversion method of multi-disaster coupling cascading failure model of power grid, it is characterized in that, The transformer parameters include: transformer name, winding type, high-voltage end voltage level, medium-voltage end voltage level, low-voltage end voltage level, high-voltage end rated capacity, medium-voltage end rated capacity, low-voltage end rated capacity, and high-voltage end tap top grade position, the lowest gear position of the high-voltage end tap, the rated gear position of the high-voltage end tap, the differential level of the high-voltage end tap, the rated voltage of the high-voltage end, the highest gear position of the medium-voltage end tap, the lowest gear of the medium-voltage end tap, and the medium-voltage end tap. Tap rated gear, medium voltage tap differential, medium voltage rated voltage, low voltage rated voltage, high voltage winding resistance, high voltage winding reactance, medium voltage winding resistance, medium voltage winding reactance, low voltage winding resistance, low voltage winding reactance, The topological node where the high-voltage side is located, the topological node where the medium-voltage side is located, the topological node where the low-voltage side is located, the high-voltage side disconnection flag, the medium-voltage side disconnection flag, the low-voltage side disconnection flag, the high-voltage side computing node, the medium-voltage side computing node, Terminal calculation node, high voltage winding reactance standard unit value, medium voltage winding resistance standard unit value, medium voltage winding reactance standard unit value, low voltage winding resistance standard unit value, low voltage winding reactance standard unit value; The transmission line parameters include AC transmission line parameters, and the AC transmission line parameters include: AC line name, voltage level, equivalent line sign, line resistance, line reactance, line single-ended susceptance, topological node where I end is located, J The topological node where the terminal is located, the I-terminal breaking flag, the J-terminal breaking flag, the allowable ampacity, the electrical island number of the I-terminal, the electrical island number of the J-terminal, the per-unit value of the line resistance, the per-unit value of the line reactance, and the single-ended susceptance of the line Pu; The load parameters include: load name, voltage level, equivalent load symbol, equivalent connection location, topological node, active power, reactive power, outage symbol and computing node. 8. according to the automatic conversion method of the grid multi-disaster coupling cascading failure model of D5000-matpower according to any one of claims 1 to 5, it is characterized in that, the transformer parameter conversion of the first data is converted into a transmission line, Including: converting two coils into one transmission line, and\or converting three coils into three transmission lines. 9. The automatic conversion method of the grid multi-disaster coupling cascading failure model of D5000-matpower according to any one of claims 1 to 5, characterized in that, obtaining the first data from the D5000 system includes: Obtain the E format file from the D5000 system according to the first cycle, including the following steps: Read the substation data card to obtain the collection of substations; Read the bus data card to obtain the bus class collection; Read the ACline data card to obtain the collection of AC lines; Read the DCline data card to obtain the collection of DC lines; Read the transformer data card to obtain the transformer class collection; Read the unit data card to obtain the motor class collection; Read the Compensator_P and Compensator_S data cards to obtain the collection of capacitors and reactors; Parsing the E-format file to obtain the first data of the grid includes generating topology data of the grid according to the E-format file, including the following steps: Judging whether the name of the bus element A is consistent with the topological node attribute of the I end of the AC line or the DC line element B or the topological node of the J end, if they are consistent, the I end or the J end of the element B is connected to the bus A; Judging whether the name of the bus element A is consistent with the topological node attribute of the I terminal of the second volume transformer element C or the topological node of the J end, if they are consistent, the I terminal or J end of the component C is connected to the bus A; Determine whether the name of the bus element A is consistent with the topological node where the high-voltage end, the medium-voltage end, or the low-voltage end of the three-volume transformer element D is located. If they are consistent, the corresponding high-voltage end, medium-voltage end, or low-voltage end of element D Connect bus A; Determine whether the name of the bus element A is consistent with the name of the topological node where the generator element E is located. If they are consistent, the outlet end of the element E is connected to the bus A; Determine whether the name of the bus element A is consistent with the name of the topological node where the capacitor or reactor element F is located. If they are consistent, the element F is connected to the bus A; Number each component to form the topology data of the power grid. 10. A computer system, comprising a memory, a processor, and a computer program stored in the memory and operable on the processor, characterized in that, when the processor executes the computer program, the above-mentioned claims 1 to 9 are implemented. A step of any of the described methods.

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