CN113011004A - Security check method, device and storage medium - Google Patents
Security check method, device and storage medium Download PDFInfo
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- CN113011004A CN113011004A CN202110208782.8A CN202110208782A CN113011004A CN 113011004 A CN113011004 A CN 113011004A CN 202110208782 A CN202110208782 A CN 202110208782A CN 113011004 A CN113011004 A CN 113011004A
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Abstract
The embodiment of the invention discloses a security check method, a security check device and a storage medium, wherein the method comprises the following steps: establishing a power supply system model, and determining a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in an alternating current power supply system in the power supply system model as a bus traction load; acquiring load data of a bus traction load at different moments and initial data of other equipment in an alternating current power supply system, wherein the equipment is different from the bus traction load; generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data; and performing flow safety check aiming at a target power supply scheme on the alternating current power supply system based on the ground state section and the bus traction load curve.
Description
Technical Field
The embodiment of the invention relates to the technical field of subway electric power monitoring, in particular to a safety check method, a safety check device and a storage medium.
Background
A subway Power monitoring system (PSCADA) has been applied to each Control center of urban rail transit, And the PSCADA can implement a monitoring Control function.
The safety evaluation of the power supply scheme requires train load data as a basis, load flow calculation is carried out on the power supply system according to the train load data, and whether the power supply scheme meets the safety power supply condition or not is judged in advance according to the result of the load flow calculation. In the prior art, the train load data is mainly simulated through traction calculation or load estimation, and real-time data cannot be acquired, while the PSCADA is a real-time operation system, so that the simulated train load data is used as actual acquired data to perform load flow calculation, which causes mismatching with the actual operation data and cannot play a role in load flow safety check of a power supply system.
Disclosure of Invention
In order to solve the technical problems, embodiments of the present invention desirably provide a safety check method, apparatus, and storage medium, in which a high-voltage transformer coil located at an ac/dc boundary in a power supply system model is determined as a bus traction load, so that load data of the bus traction load is equivalent to train load data, and load flow calculation is performed, thereby not only realizing real-time data acquisition, but also realizing safety check of a power supply system by using PSCADA.
The embodiment of the invention provides a security check method, which comprises the following steps:
establishing a power supply system model, and determining a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in an alternating current power supply system in the power supply system model as a bus traction load;
acquiring load data of the bus traction load at different moments and initial data of other equipment in the alternating current power supply system, wherein the equipment is different from the bus traction load;
generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data;
and carrying out flow safety check on the alternating current power supply system aiming at a target power supply scheme based on the ground state section and the bus traction load curve.
In the above method, the acquiring load data of the bus traction load at different times and initial data of other devices in the ac power supply system different from the bus traction load includes:
acquiring data information corresponding to the other equipment at the starting moment of a preset time period to obtain the initial data;
and acquiring data information of the bus traction load once every preset time interval in the preset time period, and determining the acquired data information as the load data.
In the above method, the generating a bus pull load curve corresponding to the ground state cross section and the bus pull load based on the load data and the initial data includes:
forming the ground state section by the data information acquired at the initial time in the load data and the initial data;
correspondingly writing the load data into a preset bus traction load curve table according to data attributes and data acquisition time to obtain a target bus traction load curve table;
and generating the bus traction load curve by using the target bus traction load curve table.
In the above method, the performing, on the basis of the ground state section and the bus traction load curve, a power flow safety check on the ac power supply system for a target power supply scheme includes:
configuring the alternating current power supply system based on the ground state section, and performing power supply adjustment on the alternating current power supply system according to a preset power supply adjustment mode so that the alternating current power supply system executes the target power supply scheme;
according to the bus traction load curve, carrying out load flow calculation on the target power supply scheme, writing a load flow calculation result into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table, wherein the target load flow calculation result curve table comprises a load flow calculation result curve table of key equipment, and the key equipment is main equipment influencing the safety of an alternating current power supply system;
and carrying out load flow safety check on the alternating current power supply system according to the target load flow calculation result curve table.
In the above method, the performing load flow calculation on the target power supply scheme according to the bus traction load curve, and writing a result of the load flow calculation into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table includes:
carrying out load flow calculation on the target power supply scheme at different moments by using data information of the bus traction load curve at different moments to obtain load flow calculation results corresponding to different moments;
and writing the load flow calculation result into the preset load flow calculation result curve table to obtain the target load flow calculation result curve table.
In the above method, the performing, according to the target load flow calculation result curve table, load flow safety check on the ac power supply system includes:
respectively taking different load flow calculation results of the key equipment from the target load flow calculation result curve table, and comparing the different load flow calculation results with corresponding preset values to obtain comparison results of the key equipment;
and judging the safety of the target power supply scheme based on the comparison result.
In the above method, the generating a bus pull load curve corresponding to the ground state cross section and the bus pull load based on the load data and the initial data includes:
generating the ground state profile based on the load data and the initial data;
generating a traction load curve to be adjusted based on the load data;
determining the bus traction load curve based on the traction load curve to be adjusted.
In the above method, the determining a bus traction load curve corresponding to the bus traction load based on the bus traction load curve to be adjusted includes:
determining the bus traction load curve to be adjusted as the bus traction load curve;
or, the bus traction load curve to be adjusted is adjusted, and the adjusted bus traction load curve is determined as the bus traction load curve.
An embodiment of the present invention provides a security check device, where the security check device includes:
the system comprises an establishing module, a bus traction load determining module and a bus traction load determining module, wherein the establishing module is used for establishing a power supply system model and determining a high-voltage transformer coil which is positioned at an alternating current/direct current boundary and contained in an alternating current power supply system in the power supply system model as the bus traction load;
the acquisition module is used for acquiring load data of the bus traction load at different moments and initial data of other equipment in the alternating current power supply system, wherein the equipment is different from the bus traction load;
the generating module is used for generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data;
and the processing module is used for carrying out power flow safety check on the alternating current power supply system aiming at a target power supply scheme based on the ground state section and the bus traction load curve.
In the above apparatus, the acquisition module is specifically configured to acquire data information corresponding to the starting time of the other device in a preset time period, so as to obtain the initial data;
and acquiring data information of the bus traction load once every preset time interval in the preset time period, and determining the acquired data information as the load data.
In the above apparatus, the generating module is specifically configured to combine data information acquired at a starting time in the load data with the initial data to form the ground state section;
correspondingly writing the load data into a preset bus traction load curve table according to data attributes and data acquisition time to obtain a target bus traction load curve table;
and generating the bus traction load curve by using the target bus traction load curve table.
In the above apparatus, the processing module is specifically configured to configure the ac power supply system based on the ground state section, and perform power supply adjustment on the ac power supply system according to a preset power supply adjustment manner, so that the ac power supply system executes the target power supply scheme;
according to the bus traction load curve, carrying out load flow calculation on the target power supply scheme, writing a load flow calculation result into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table, wherein the target load flow calculation result curve table comprises a load flow calculation result curve table of key equipment, and the key equipment is main equipment influencing the safety of the alternating current power supply system;
and carrying out load flow safety check on the alternating current power supply system according to the target load flow calculation result curve table.
In the above apparatus, the processing module is specifically configured to perform load flow calculation at different times on the target power supply scheme by using data information at different times in the bus traction load curve, so as to obtain load flow calculation results corresponding to different times;
and writing the load flow calculation result into the preset load flow calculation result curve table to obtain the target load flow calculation result curve table.
In the above apparatus, the processing module is specifically configured to respectively take out different load flow calculation results of the key device from the target load flow calculation result curve table, and compare the load flow calculation results with corresponding preset values to obtain comparison results of the key device;
and judging the safety of the target power supply scheme based on the comparison result.
In the above apparatus, the generating module is specifically configured to generate the ground state section based on the load data and the initial data;
generating a traction load curve to be adjusted based on the load data; determining the bus traction load curve based on the traction load curve to be adjusted.
In the above apparatus, the generating module is specifically configured to determine the bus traction load curve to be adjusted as the bus traction load curve;
or, the bus traction load curve to be adjusted is adjusted, and the adjusted bus traction load curve is determined as the bus traction load curve.
An embodiment of the present invention provides a security check device, where the security check device includes: a processor, a memory, and a communication bus;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor is used for executing the safety check program stored in the memory so as to realize the safety check method.
An embodiment of the present invention provides a computer-readable storage medium, where one or more programs are stored, and the one or more programs may be executed by one or more processors to implement the above security check method.
The embodiment of the invention provides a security check method, a security check device and a storage medium, wherein the method comprises the following steps: establishing a power supply system model, and determining a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in an alternating current power supply system in the power supply system model as a bus traction load; acquiring load data of a bus traction load at different moments and initial data of other equipment in an alternating current power supply system, wherein the equipment is different from the bus traction load; generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data; and performing flow safety check aiming at a target power supply scheme on the alternating current power supply system based on the ground state section and the bus traction load curve. According to the safety check method provided by the embodiment of the invention, the high-voltage transformer coil positioned at the boundary of alternating current and direct current in the power supply system model is determined as the bus traction load, so that load data of the bus traction load is equivalent to train load data, load flow calculation is carried out, real-time data acquisition is realized, and the safety check of the power supply system can be realized by utilizing PSCADA.
Drawings
Fig. 1 is a schematic flow chart of a security check method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an exemplary power supply system model according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an exemplary power supply system with equal train traction load and bus traction load values according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating modeling of an exemplary bus traction load curve and a curve of a critical equipment load flow calculation result according to an embodiment of the present invention;
fig. 5 is a first schematic structural diagram of a security check device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a security check device according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
The embodiment of the invention discloses a security check method. Fig. 1 is a schematic flow chart of a security check method according to an embodiment of the present invention. As shown in fig. 1, the method mainly comprises the following steps:
s101, establishing a power supply system model, and determining a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in an alternating current power supply system in the power supply system model as a bus traction load.
In the embodiment of the invention, the safety checking device can establish a power supply system model, and determine a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in the alternating current power supply system in the power supply system model as a bus traction load.
It should be noted that, in the embodiment of the present invention, the power supply system model established by the security check device in the PSCADA is a power supply system model conforming to the IEC-61970 standard, and the power supply system is used for describing basic attributes and connection relationships of various devices in the power supply system. The specific power supply system model can be set according to the actual application scene and the requirement, and the embodiment of the invention is not limited.
Fig. 2 is a schematic structural diagram of an exemplary power supply system model according to an embodiment of the present invention. As shown in fig. 2, the dotted line is the ac/dc boundary of the power supply system, the ac power supply system is above the dotted line, the dc power supply system is below the dotted line, the trains 1 to 8 are simulated train distributions, and since the train distribution and the train load cannot be collected in the PSCADA system, the load of the train cannot be used to directly perform the load flow calculation, but the rectifier transformers 1 to 2 and the high voltage transformer coils of the inverter feedback transformers 1 to 2 at the dotted line can directly collect the data information of active power, reactive power, voltage, current, etc., so the safety check device determines the high voltage transformer coils located at the ac/dc boundary and included in the ac power supply system in the power supply system model as the bus traction load, and replaces the train traction load data with the bus traction load to perform the load flow calculation, thereby not only realizing the real-time data collection in the PSCADA system, and load flow calculation can be carried out, and the safety check of the power supply system is realized.
Fig. 3 is a schematic diagram of an exemplary power supply system with equal values of train traction load and bus traction load according to an embodiment of the present invention. As shown in fig. 3, the train load of the dc power supply system is represented by a bus traction load 1, a bus traction load 2, a bus traction load 3, a bus traction load 4, and the like, and the collection values of the bus traction load 1 to the bus traction load 4 are the collection values of the high-voltage transformer coils of the rectifier transformers 1 to 2 and the inverter feedback transformers 1 to 2, so that the train load in the power supply system can be represented by the bus traction load 1 to the bus traction load 4, and the power flow calculation of the power supply system has basic load data.
S102, collecting load data of the bus traction load at different moments and initial data of other equipment different from the bus traction load in the alternating current power supply system.
In the embodiment of the invention, after the bus traction load is determined, the safety check device can directly acquire the load data of the bus traction load at different moments and initial data of other equipment in the alternating current power supply system, which is different from the bus traction load, as the basic data of load flow calculation.
Specifically, in the embodiment of the present invention, the acquiring, by the security check device, load data of the bus traction load at different times and initial data of other devices in the ac power supply system, which are different from the bus traction load, includes: acquiring data information corresponding to other equipment at the starting moment of a preset time period to obtain initial data; and in a preset time period, collecting data information of the bus traction load once at intervals of a preset time length, and determining the collected data information as load data.
It should be noted that, in the embodiment of the present invention, the preset time period may be a peak time period, or may be a certain time period set by a technician, and specifically, the preset time period may be set according to actual needs and application scenarios.
It should be noted that, in the embodiment of the present invention, the safety check device determines, as initial data, the acquired data information of the other devices in the ac system at the starting time, where the initial data includes a state of a switch in the ac system, a bus voltage, active power and reactive power of an ac line, load active power and reactive power, an active power and reactive power of a transformer, and the like, and the state of the other devices in the ac system at the starting time can be restored.
It should be noted that, in the embodiment of the present invention, the safety check device collects data information of the bus traction load once every preset time interval in a preset time period, and determines the collected data information as load data, where the preset time interval may be a frequency of collecting data by the safety check device, or a time interval set by a technician, and specifically, the preset time interval may be set according to actual needs and application scenarios.
It should be noted that, in the embodiment of the present invention, the data information of the bus traction load collected by the safety check device includes information of active power, reactive power, voltage, current, and the like of the bus traction load, and the data information is used to restore the load state of the bus traction load at preset time intervals in the preset time period.
And S103, generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data.
In the embodiment of the invention, the safety checking device can generate the bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data.
Specifically, in an embodiment of the present invention, the generating, by the security check device, a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data includes: forming a ground state section by data information acquired at the initial moment in the load data and the initial data; correspondingly writing the load data into a preset bus traction load curve table according to the data attribute and the data acquisition time to obtain a target bus traction load curve table; and generating a bus traction load curve by using the target bus traction load curve table.
It should be noted that, in the embodiment of the present invention, the ground state section is composed of load data of the bus traction load acquired at the starting time of the preset time period and initial data of other devices in the alternating current system except the bus traction load at the starting time, and the ground state section can restore the power supply scheme of the alternating current system at the starting time of the preset time period.
It should be noted that, in the embodiment of the present invention, the safety check device acquires load data at different times, and correspondingly writes the load data into the preset bus traction load curve table according to the data attribute and the data acquisition time to obtain the target bus traction load curve table, specifically, the data attribute refers to basic attributes of active power, reactive power, voltage, current, and the like of the bus traction load, the data acquisition time refers to a plurality of data acquisition times determined according to preset intervals within a preset time period, and the preset bus traction load curve table is an empty table which is established when the power supply system model is established and does not store data information.
Fig. 4 is a schematic diagram illustrating modeling of an exemplary bus traction load curve and a curve of a critical equipment load flow calculation result according to an embodiment of the present invention. As shown in fig. 4, the bus traction load and the high-voltage transformer coil are in a one-to-one relationship, and a device code (ID) of the high-voltage transformer coil corresponds to the bus traction load 1 to the bus traction load 4.
Illustratively, as can be seen from fig. 2, the bus traction load 1 corresponds to the high-voltage transformer coil of the rectifier transformer 1, the bus traction load 2 corresponds to the inverter feedback transformer 1, the bus traction load 3 corresponds to the high-voltage transformer coil of the rectifier transformer 2, and the bus traction load 4 corresponds to the inverter feedback transformer 2.
It should be noted that, in the embodiment of the present invention, a preset bus traction load curve table is established in the PSCADA, and a corresponding relationship is established with the bus traction load, that is, each of the bus traction load 1 to the bus traction load 4 corresponds to one preset bus traction load curve table, and a storage location of data information is reserved in each preset bus traction load curve table, for example: the bus traction load curve table comprises basic attributes such as bus traction load codes (ID), point numbers, active power, reactive power, voltage, current and the like, and data information to be stored in the bus traction load curve table corresponds to the data information to be stored in the preset bus traction load curve table in a one-to-many mode.
Illustratively, the safety check device performs data acquisition on the bus traction load 1 for multiple times to obtain multiple groups of data information, and a space for storing the multiple groups of data information is reserved in the preset bus traction load curve table.
Illustratively, when the safety check device acquires load data at the starting moment, the data attribute is judged, if the bus traction load is active, the data attribute is correspondingly written into a position in a preset bus traction load curve table for indicating the active starting moment, and a target bus traction load curve table is acquired after all the load data acquired at different moments are written into the preset bus traction load curve table.
In the embodiment of the present invention, the safety check device may generate a bus traction load curve representing changes of each data of the bus traction load at different times according to the obtained target bus traction load curve table.
For example, when the safety check device determines a point in the bus traction load curve representing the starting time, all data information of the bus traction load at the starting time can be correspondingly obtained.
Specifically, in an embodiment of the present invention, the generating, by the security check device, a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data includes: generating a ground state section based on the load data and the initial data; generating a traction load curve to be adjusted based on the load data; and determining a bus traction load curve based on the traction load curve to be adjusted.
It should be noted that, in the embodiment of the present invention, the safety check device may generate the ground state section according to the load data at the starting time and the initial data, and generate the traction load curve to be adjusted according to the load data of the bus traction load at different times, where the traction load curve to be adjusted is generated based on the load data directly acquired at different times, and is not subjected to data processing.
Specifically, in the embodiment of the present invention, the determining, by the safety check device, the bus traction load curve corresponding to the bus traction load based on the bus traction load curve to be adjusted includes: determining a bus traction load curve to be adjusted as a bus traction load curve; or, adjusting the bus traction load curve to be adjusted, and determining the adjusted bus traction load curve as the bus traction load curve.
It should be noted that, in the embodiment of the present invention, the safety check device may directly determine the bus traction load curve to be adjusted as the bus traction load curve, or may perform data processing on the bus traction load curve to be adjusted to obtain the bus traction load curve, and the determination of the specific bus traction load curve may be determined according to actual requirements and application scenarios.
For example, the safety check device may adjust the bus traction load according to a certain coefficient on the basis of the bus traction load curve to be adjusted, so as to obtain an adjusted bus traction load curve, and determine the adjusted bus traction load curve as the bus traction load curve to perform load flow calculation, where a specific adjustment mode of the bus traction load curve may be set according to an actual application scenario and a requirement, and an embodiment of the present invention is not limited.
And S104, performing flow safety check aiming at a target power supply scheme on the alternating current power supply system based on the ground state section and the bus traction load curve.
In the embodiment of the invention, the safety check device performs the tidal current safety check aiming at the target power supply scheme on the alternating current power supply system based on the ground state section and the bus traction load curve.
It should be noted that, in the embodiment of the present invention, the target power supply scheme may be a power supply scheme from a ground state section reduction to an ac system, or may be a power supply scheme obtained by adjusting a power supply scheme of an ac system based on the ground state section, and the specific target power supply scheme may be determined according to actual needs and application scenarios.
Specifically, in the embodiment of the present invention, the safety check device performs a tidal current safety check for a target power supply scheme on an ac power supply system based on a ground state section and a bus traction load curve, and includes: configuring an alternating current power supply system based on the ground state section, and performing power supply adjustment on the alternating current power supply system according to a preset power supply adjustment mode so that the alternating current power supply system executes a target power supply scheme; according to a bus traction load curve, carrying out load flow calculation on a target power supply scheme, writing a load flow calculation result into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table, wherein the target load flow calculation result curve table comprises a load flow calculation result curve table of key equipment, and the key equipment is main equipment influencing the safety of an alternating current power supply system; and carrying out load flow safety check on the alternating current power supply system according to the target load flow calculation result curve table.
It should be noted that, in the embodiment of the present invention, the safety check device needs to load the ground state section into the power supply system model, configure the ac power supply system, and obtain the configured ac power supply system.
It should be noted that, in the embodiment of the present invention, on the basis of the configured ac power supply system, the safety check device performs power supply adjustment on the ac power supply system according to a preset power supply adjustment manner, so that the ac power supply system executes the target power supply scheme, where the preset power supply adjustment manner may be to obtain the target power supply scheme by adjusting an on-off state of a switch disconnecting link capable of controlling a power supply manner in the ac power supply system.
For example, as shown in fig. 3, the safety check device may adjust the on/off state of a switch disconnecting link capable of controlling the power supply mode in the ac power supply system to adjust the power supply of the ac power supply system, for example, in a normal case, all of the switches 2 to 5 are in a closed state, and the switches 1 and 6 are in an open state, if the main transformer 1 fails, the switches 2 and 4 in fig. 3 need to be opened, and the switch 6 is closed, so that a target power supply scheme for supplying power only by using the main transformer 2 may be obtained.
It should be noted that, in the embodiment of the present invention, the switches 7 to 14 are in the normally closed state.
It should be noted that, in the embodiment of the present invention, after determining the target power supply scheme, the safety check device performs load flow calculation on a critical device, among other devices, according to the bus traction load curve, where the critical device is a main device that affects safety of the ac power supply system, for example: a transformer, bus, or ac line.
It should be further noted that, in the embodiment of the present invention, after the security check device performs the load flow calculation on the target power supply scheme, the result of the load flow calculation is written into the preset load flow calculation result curve table corresponding to the key device, so as to obtain the target load flow calculation result curve table, where the load flow calculation results of the key devices at different times are stored in the target load flow calculation result curve table.
Specifically, in the embodiment of the present invention, the safety check device performs load flow calculation on the target power supply scheme according to the bus traction load curve, and writes a result of the load flow calculation into the preset load flow calculation result curve table to obtain the target load flow calculation result curve table, including: carrying out load flow calculation on the target power supply scheme at different moments by using data information of the bus traction load curve at different moments to obtain load flow calculation results corresponding to different moments; and correspondingly writing the load flow calculation results corresponding to different moments into a preset load flow calculation result curve table according to the data attributes to obtain a target load flow calculation result curve table.
It should be noted that, in the embodiment of the present invention, the bus traction load curve corresponds to data information at different times, where the different times refer to different times determined every preset time within a preset time period, and the number of times corresponding to the different times is the number of times of load flow calculation performed by the key device in the current safety check process.
In the embodiment of the present invention, the bus traction load curve is a curve formed by drawing data information at different times, the bus traction load curve is drawn by taking time as a horizontal axis and data information as a vertical axis, that is, the bus traction load curve includes a plurality of bus traction load curves with different data attributes, for example, a voltage curve of the bus traction load, a current curve of the bus traction load, an active power curve of the bus traction load, a reactive power curve of the bus traction load, and other curves with different data attributes, and when a power flow calculation is required, the power flow calculation is performed by determining data information represented by curve points with different data attributes corresponding to the same time as a basis of the power flow calculation.
It should be noted that, in the embodiment of the present invention, after determining the data information corresponding to the bus traction load at the same time, the security check device restores the data information corresponding to the time to the high-voltage transformer coil of the rectifier transformer and the inverter feedback transformer at the ac/dc boundary of the power supply system, performs power flow calculation on the target power supply scheme at different times under the action of the high-voltage transformer coil, obtains power flow calculation results corresponding to different times, and writes the power flow calculation results into the corresponding preset power flow calculation result curve table according to the data attributes corresponding to the power flow calculation results, where the preset power flow calculation result curve table is an empty table that is created when the power supply system model is created and has no data information stored therein.
Fig. 4 is a schematic diagram illustrating modeling of an exemplary bus traction load curve and a curve of a critical equipment load flow calculation result according to an embodiment of the present invention. As shown in fig. 4, the safety check device establishes a preset load flow calculation result curve table of the key device in the PSCADA, where the preset load flow calculation result curve table includes a preset transformer coil load flow calculation result curve table, a preset ac line load flow calculation result curve table, and a preset bus load flow calculation result curve table, and specifically, the number of the preset load flow calculation result curve tables established by the safety check device is related to the number of the key devices included in the ac power supply system.
For example, as shown in fig. 2, the transformers refer to a main transformer 1 to a main transformer 2, and then, when the safety check device establishes a preset transformer load flow calculation result curve table, the preset transformer load flow calculation result curve table includes a high-voltage transformer coil load flow calculation result curve table of the preset main transformer 1, a high-voltage transformer coil load flow calculation result curve table of the preset main transformer 2, a low-voltage transformer coil load flow calculation result curve table of the preset main transformer 1 and a low-voltage transformer coil load flow calculation result curve table of the preset main transformer 2, and the number of the specifically established preset transformer coil load flow calculation result curve tables may be determined according to actual requirements and application scenarios.
It should be noted that, in the embodiment of the present invention, a space for correspondingly storing a result of the load flow calculation of each key device is reserved in the preset load flow calculation result curve table established by each key device, where the space is, for example: the method comprises the following steps that basic attributes such as key equipment codes (ID), point numbers, active power, reactive power, voltage, current and the like are obtained, and data information stored in a preset load flow calculation result curve table of the key equipment and the key equipment is in one-to-many correspondence.
It should be noted that, in the embodiment of the present invention, the number of groups of data information to be stored in the preset bus traction load curve table is equal to the number of groups of data information to be stored in the preset load flow calculation result curve table of the key device.
Illustratively, when the safety check device carries out the ith load flow calculation, the active power and the reactive power at the ith moment are taken from the bus traction load curve as the current active power and the current reactive power of the bus traction load, and the active power and the reactive power are restored to a high-voltage transformer coil of a rectifier transformer and an inversion feedback transformer at the AC/DC boundary of the power supply system, then carrying out load flow calculation on the target power supply scheme, if the load flow calculation is carried out by utilizing data information corresponding to the ith moment in the bus traction load curve, obtaining the load flow calculation result of the transformer coil, namely, the voltage, the current, the active power and the reactive power of the transformer coil correspond to the voltage, the current, the active power and the reactive power at the i-th time point written in the power flow calculation result table corresponding to the transformer coil.
It should be further noted that, in the embodiment of the present invention, the safety check device may perform load flow calculation on the target power supply scheme of the ac power supply system by using data information corresponding to different times in the bus traction load curve, and write the target power supply scheme into the corresponding preset load flow calculation result curve table until the target load flow calculation result curve table is obtained.
Specifically, in the embodiment of the present invention, the performing, by the safety check device, the load flow safety check on the ac power supply system according to the target load flow calculation result curve table includes: respectively taking different load flow calculation results of the key equipment from the target load flow calculation result table, and comparing the load flow calculation results with corresponding preset values to obtain comparison results of the key equipment; and judging the safety of the target power supply scheme based on the comparison result.
It should be noted that, in the embodiment of the present invention, the safety check device compares any data stored in the load flow calculation result table with the preset value of the data attribute of the corresponding key device according to the data attribute, so as to obtain the comparison result.
Illustratively, if the transformer coil is subjected to safety check, the safety check device respectively takes out data stored in a load flow calculation result table of a target transformer coil and compares the data with a preset value corresponding to the transformer coil, specifically, if thirty load flow calculation results are stored in the load flow calculation result table of the target transformer coil, data information of a plurality of data attributes included in each load flow calculation result is compared with a preset safety limit value corresponding to the data attribute of the transformer coil, if active power, reactive power and current in the load flow calculation result are greater than the preset safety limit value or voltage is greater than the preset safety upper limit value or less than the preset safety lower limit value, the target power supply scheme has potential safety hazards, weak links of the target power supply scheme are found, and safety check of the target power supply scheme is realized.
The embodiment of the invention discloses a security check method, which comprises the following steps: establishing a power supply system model, and determining a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in an alternating current power supply system in the power supply system model as a bus traction load; acquiring load data of a bus traction load at different moments and initial data of other equipment in an alternating current power supply system, wherein the equipment is different from the bus traction load; generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data; and performing flow safety check aiming at a target power supply scheme on the alternating current power supply system based on the ground state section and the bus traction load curve. According to the safety check method provided by the embodiment of the invention, the high-voltage transformer coil positioned at the boundary of alternating current and direct current in the power supply system model is determined as the bus traction load, so that load data of the bus traction load is equivalent to train load data, load flow calculation is carried out, real-time data acquisition is realized, and the safety check of the power supply system can be realized by utilizing PSCADA.
The embodiment of the invention also provides a security check device, and fig. 5 is a schematic structural diagram of the security check device provided by the embodiment of the invention. As shown in fig. 5, the security check device includes:
the system comprises an establishing module 501, a bus traction load determining module and a bus traction load determining module, wherein the establishing module is used for establishing a power supply system model and determining a high-voltage transformer coil which is positioned at an alternating current/direct current boundary and is contained in an alternating current power supply system in the power supply system model as the bus traction load;
an acquisition module 502, configured to acquire load data of the bus traction load at different times and initial data of other devices in the ac power supply system, where the other devices are different from the bus traction load;
a generating module 503, configured to generate a bus traction load curve corresponding to the bus traction load and a ground state cross section based on the load data and the initial data;
and the processing module 504 is configured to perform power flow safety check on the ac power supply system according to a target power supply scheme based on the ground state section and the bus traction load curve.
Optionally, the acquisition module 502 is specifically configured to acquire data information corresponding to the starting time of the other device in a preset time period, so as to obtain the initial data; and acquiring data information of the bus traction load once every preset time interval in the preset time period, and determining the acquired data information as the load data.
Optionally, the generating module 503 is specifically configured to combine data information acquired at an initial time in the load data with the initial data to form the ground state section; correspondingly writing the load data into a preset bus traction load curve table according to data attributes and data acquisition time to obtain a target bus traction load curve table; and generating the bus traction load curve by using the target bus traction load curve table.
Optionally, the processing module 504 is specifically configured to configure the ac power supply system based on the ground state section, and adjust power supply of the ac power supply system according to a preset power supply adjustment manner, so that the ac power supply system executes the target power supply scheme; according to the bus traction load curve, carrying out load flow calculation on the target power supply scheme, writing a load flow calculation result into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table, wherein the target load flow calculation result curve table comprises a load flow calculation result curve table of key equipment, and the key equipment is main equipment influencing the safety of an alternating current power supply system; and carrying out load flow safety check on the alternating current power supply system according to the target load flow calculation result curve table.
Optionally, the processing module 504 is specifically configured to perform load flow calculation on a target power supply scheme at different times by using data information of the bus traction load curve at different times to obtain load flow calculation results corresponding to different times; and correspondingly writing the load flow calculation results corresponding to different moments into the preset load flow calculation result curve table according to data attributes and the different moments to obtain the target load flow calculation result curve table.
Optionally, the processing module 504 is specifically configured to sequentially extract a load flow calculation result of the key device from the load flow calculation result table corresponding to the key device, and compare the load flow calculation result with a preset value of the key device to obtain a comparison result of the key device; and judging the safety of the target power supply scheme based on the comparison result.
Optionally, the generating module 503 is specifically configured to generate the ground state section based on the load data and the initial data; generating a traction load curve to be adjusted based on the load data; determining the bus traction load curve based on the traction load curve to be adjusted.
Optionally, the generating module 503 is specifically configured to determine the bus traction load curve to be adjusted as the bus traction load curve; or, the bus traction load curve to be adjusted is adjusted, and the adjusted bus traction load curve is determined as the bus traction load curve.
Fig. 6 is a schematic structural diagram of a security check device according to an embodiment of the present invention. As shown in fig. 6, the security check device includes: a processor 601, memory 602, and a communication bus 603;
the communication bus 603 is used for realizing communication connection between the processor 601 and the memory 602;
the processor 601 is configured to execute the security check program stored in the memory 602, so as to implement the security check method.
The embodiment of the invention provides a safety checking device, which is used for establishing a power supply system model and determining a high-voltage transformer coil which is positioned at an alternating current/direct current boundary and contained in an alternating current power supply system in the power supply system model as a bus traction load; acquiring load data of a bus traction load at different moments and initial data of other equipment in an alternating current power supply system, wherein the equipment is different from the bus traction load; generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data; and performing flow safety check aiming at a target power supply scheme on the alternating current power supply system based on the ground state section and the bus traction load curve. According to the safety check device provided by the embodiment of the invention, the high-voltage transformer coil positioned at the boundary of alternating current and direct current in the power supply system model is determined as the bus traction load, so that load data of the bus traction load is equivalent to train load data, load flow calculation is carried out, real-time data acquisition is realized, and the safety check of the power supply system can be realized by utilizing PSCADA.
An embodiment of the present invention provides a computer-readable storage medium, where one or more programs are stored, and the one or more programs may be executed by one or more processors to implement the above security check method.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. A security check method, the method comprising:
establishing a power supply system model, and determining a high-voltage transformer coil which is positioned at the boundary of alternating current and direct current and contained in an alternating current power supply system in the power supply system model as a bus traction load;
acquiring load data of the bus traction load at different moments and initial data of other equipment in the alternating current power supply system, wherein the equipment is different from the bus traction load;
generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data;
and carrying out flow safety check on the alternating current power supply system aiming at a target power supply scheme based on the ground state section and the bus traction load curve.
2. The method of claim 1, wherein the collecting load data of the bus traction load at different times and initial data of other devices in the ac power supply system different from the bus traction load comprises:
acquiring data information corresponding to the other equipment at the starting moment of a preset time period to obtain the initial data;
and acquiring data information of the bus traction load once every preset time interval in the preset time period, and determining the acquired data information as the load data.
3. The method of claim 1, wherein generating a bus pull load curve corresponding to the ground state profile and the bus pull load based on the load data and the initial data comprises:
forming the ground state section by the data information acquired at the initial time in the load data and the initial data;
correspondingly writing the load data into a preset bus traction load curve table according to data attributes and data acquisition time to obtain a target bus traction load curve table;
and generating the bus traction load curve by using the target bus traction load curve table.
4. The method of claim 1, wherein the performing a power flow safety check on the ac power supply system for a target power supply scheme based on the ground state profile and the bus pull load curve comprises:
configuring the alternating current power supply system based on the ground state section, and performing power supply adjustment on the alternating current power supply system according to a preset power supply adjustment mode so that the alternating current power supply system executes the target power supply scheme;
according to the bus traction load curve, carrying out load flow calculation on the target power supply scheme, writing a load flow calculation result into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table, wherein the target load flow calculation result curve table comprises a load flow calculation result curve table of key equipment, and the key equipment is main equipment influencing the safety of an alternating current power supply system;
and carrying out load flow safety check on the alternating current power supply system according to the target load flow calculation result curve table.
5. The method according to claim 4, wherein the performing a load flow calculation on the target power supply scheme according to the bus traction load curve, and writing a result of the load flow calculation into a preset load flow calculation result curve table to obtain a target load flow calculation result curve table comprises:
carrying out load flow calculation on the target power supply scheme at different moments by using data information of the bus traction load curve at different moments to obtain load flow calculation results corresponding to different moments;
and writing the load flow calculation result into the preset load flow calculation result curve table to obtain the target load flow calculation result curve table.
6. The method according to claim 4, wherein the performing a power flow safety check on the ac power supply system according to the target power flow calculation result curve table comprises:
respectively taking different load flow calculation results of the key equipment from the target load flow calculation result curve table, and comparing the different load flow calculation results with corresponding preset values to obtain comparison results of the key equipment;
and judging the safety of the target power supply scheme based on the comparison result.
7. The method of claim 1, wherein generating a bus pull load curve corresponding to the ground state profile and the bus pull load based on the load data and the initial data comprises:
generating the ground state profile based on the load data and the initial data;
generating a traction load curve to be adjusted based on the load data;
determining the bus traction load curve based on the traction load curve to be adjusted.
8. The method of claim 7, wherein determining a bus traction load curve corresponding to the bus traction load based on the bus traction load curve to be adjusted comprises:
determining the bus traction load curve to be adjusted as the bus traction load curve;
or, the bus traction load curve to be adjusted is adjusted, and the adjusted bus traction load curve is determined as the bus traction load curve.
9. A security check apparatus, comprising:
the system comprises an establishing module, a bus traction load determining module and a bus traction load determining module, wherein the establishing module is used for establishing a power supply system model and determining a high-voltage transformer coil which is positioned at an alternating current/direct current boundary and contained in an alternating current power supply system in the power supply system model as the bus traction load;
the acquisition module is used for acquiring load data of the bus traction load at different moments and initial data of other equipment in the alternating current power supply system, wherein the equipment is different from the bus traction load;
the generating module is used for generating a bus traction load curve corresponding to the ground state section and the bus traction load based on the load data and the initial data;
and the processing module is used for carrying out power flow safety check on the alternating current power supply system aiming at a target power supply scheme based on the ground state section and the bus traction load curve.
10. A security check apparatus, comprising: a processor, a memory, and a communication bus;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor is configured to execute the security check program stored in the memory to implement the security check method according to any one of claims 1 to 8.
11. A computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the security check method of any one of claims 1-8.
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