Multi-section checking method and device suitable for online safety analysis research state

Abstract

The invention relates to a multi-section checking method and device suitable for an on-line safety analysis research state, and the method comprises the following processes: real-time state data section case storage, section case power grid characteristic identification, research state multi-section case loading, and research state multi-section mode adjustment. And carrying out on-line research state multi-section safety and stability analysis and comparison display on a research state multi-section check result. Along with the development of a novel electric power system, the running characteristics of a power grid are deeply changed, the running mode of the power grid is more complicated, the traditional single-section checking research cannot meet the dynamically changing power grid mode, and the running risk of the power grid cannot be comprehensively identified, so that a multi-section checking method suitable for an online safety analysis research state is urgently needed. And the operation risk of the power grid is quickly mastered and is clear at a glance.

Description

Technical Field

[0001] The invention belongs to the technical field of power system automation, and in particular relates to a multi-section verification method and device suitable for online safety analysis and research. Background Art

[0002] The existing online safety analysis research can only conduct verification research on the power grid operation mode at a single section. If the dispatching and operating personnel need to understand the operation risks of the power grid at other times, they need to reload new section data, re-adjust the mode and recalculate and verify. This traditional verification method has heavy calculation tasks and low work efficiency.

[0003] With the development of new power systems, the operating characteristics of power grids have undergone profound changes, and the operating mode of power grids has become increasingly complex. The verification research of a single section can no longer meet the dynamically changing operating mode of the power grid, nor can it fully identify the operating risks of the power grid. There is an urgent need for a multi-section verification method suitable for the online research state of the online safety analysis system. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention discloses a multi-section verification method and device suitable for online safety analysis and research to comprehensively identify the operation risks of power grids.

[0005] Technical solution: A multi-section verification method suitable for online safety analysis and research, including:

[0006] Acquire the power grid model and operation data through real-time data processing of the power grid online safety analysis system, and store data section cases, wherein the data section cases include the power grid model, operation data, data section time, data size and data storage time;

[0007] Count the power generation and load in all data section cases by the entire network / region, and identify the grid characteristics of the data section cases;

[0008] The dispatching operation personnel select multiple sets of the data section cases to construct a multi-section case, and select one data section case from them to set as a reference section, and load the multi-section case for the online research state of the power grid online safety analysis system;

[0009] According to the model and data of the reference section, the operation mode of the power grid is adjusted, and the corresponding mode of the reference section is automatically applied to other data section cases in the multi-section case to achieve the multi-section mode adjustment in the online research state;

[0010] Based on the adjusted grid operation mode, calculation parameters and setting tasks, online research state multi-section safety and stability analysis is carried out on a rolling basis. Based on the multi-section safety and stability analysis results, a comparative display of online research state multi-section verification results is achieved.

[0011] Furthermore, the stored data section case is to periodically obtain the power grid model and operation data in the real-time state of online safety analysis, compress and store them in the configuration directory, and add records in the database section case index table, wherein the records include the data section time, data size, and data saving time.

[0012] Furthermore, the storage duration is set, and data section cases that exceed the maximum storage duration are automatically deleted, and data section cases that exceed the remote duration are deleted at random. The random deletion is to re-manage the section cases stored in the original period and turn them into new period storage.

[0013] Furthermore, the identification of power grid characteristics of data section cases refers to identifying the power grid characteristics of each data section case by counting the total power generation, total load, new energy and key section power in the entire network / region in the data section cases, and at the same time identifying the maximum / minimum total power generation, maximum / minimum load, maximum / minimum new energy power generation, and maximum / minimum key section data section cases for the entire network and each sub-region on a daily, weekly, monthly and yearly basis as special data section cases for dispatching and operation personnel to quickly screen.

[0014] Furthermore, the online research state loading multi-section case includes:

[0015] Rapid screening of data section cases: quickly screening data section cases to be studied by specifying time periods and grid characteristics;

[0016] Multi-section case loading, screened data section cases to be studied, after confirmation by dispatching and operating personnel, obtain the power grid equipment model and data of the benchmark section, and load them into the real-time library table of the power dispatching technical support system.

[0017] Furthermore, the multi-section mode adjustment of the online research state includes:

[0018] Graphical adjustment, based on the real-time database table of the power dispatching technical support system, can directly adjust the mode of power grid equipment on the power flow diagram and plant station diagram, including: equipment startup / shutdown, switch position change, power generation / load setting, etc., intuitively displaying the power flow changes before and after the power grid operation mode adjustment;

[0019] Batch adjustment of power generation and load supports batch adjustment of power generation and load of the entire network / region in the form of a list. According to the principle of equal proportion, the power generation / load adjustment value is allocated to each unit / load taking into account the upper / lower limit of the unit output and the lower limit of the load not less than 0.

[0020] The adjustment method is automatically applied. By caching all the adjustment operations performed under the benchmark section, when other sections to be verified are loaded, the cached adjustment operations are automatically applied to the new section data, avoiding repeated adjustments and improving work efficiency.

[0021] Furthermore, the calculation parameters and setting tasks include:

[0022] The calculation tasks are customized, and the dispatching and operation personnel set the calculation functions that need to be analyzed and verified for this research section, including static safety analysis, short-circuit current calculation, short-circuit ratio analysis, transient stability analysis, stability margin analysis, static voltage stability analysis, and small disturbance stability analysis;

[0023] The expected fault set is customized, and the expected fault set for this analysis and verification is set on the power flow diagram, plant station diagram or data maintenance tool of the power dispatching technical support system, including AC line fault, transformer fault, bus fault, generator fault and DC fault.

[0024] Furthermore, the rolling implementation of multi-section safety and stability analysis in the online research state means that the online research state sends the calculation data packet of the benchmark section to the online analysis parallel computing platform, and carries out parallel computing according to the expected faults;

[0025] At the same time, the power grid equipment model and data of the next data section to be verified are automatically loaded into the real-time library table of the new generation dispatching technical support system, and the adjustment operation in the reference section is automatically applied to form the calculation data package of the next section to be verified, until all sections to be verified have generated calculation data packages;

[0026] After the online analysis parallel computing platform completes the parallel computing of the benchmark section calculation data package, it uploads the calculation results and simultaneously obtains the next section calculation data package to be verified to carry out parallel computing until the calculation data packages of all verified sections are completed.

[0027] Furthermore, the online research state multi-section verification results are displayed, including:

[0028] The parallel calculation results are stored in the database, and the section verification results returned by the online analysis parallel calculation platform are obtained and written into the database for screen display. At the same time, the calculation results in each verification section are cached as result cases for subsequent review and use;

[0029] Comparison of multi-section verification results. For static safety analysis, short-circuit current and other functions, verification results under different data section cases are obtained by component, and compared and displayed, so that dispatching and operation personnel can quickly understand the operating risks of different components in each section.

[0030] The present invention also discloses a multi-section verification device suitable for online safety analysis and research, comprising:

[0031] A data section case storage module is used to obtain power grid models and operation data through real-time data processing of the power grid online safety analysis system, and store data section cases;

[0032] The grid feature identification module is used to count the power generation and load in all data section cases according to the entire network / region, and identify the grid features of the data section cases;

[0033] A multi-section case loading module is used to construct a multi-section case, select a data section case from it and set it as a reference section, and load the multi-section case for the online research state of the power grid online safety analysis system;

[0034] A power grid operation mode adjustment module is used to adjust the power grid operation mode according to the model and data of the reference section, automatically apply the corresponding mode adjustment of the reference section to other data section cases in the multi-section case, and realize the multi-section mode adjustment of the online research state;

[0035] The dynamic analysis and display module is used to carry out rolling online research-state multi-section safety and stability analysis based on the adjusted power grid operation mode, calculation parameters and task settings; based on the multi-section safety and stability analysis results, the comparison and display of the online research-state multi-section verification results are realized.

[0036] Beneficial effects: The present invention discloses a multi-section verification method suitable for online safety analysis research, which realizes one-key loading of multiple sections in the research state, automatic adjustment of operation mode, and rapid scanning of calculation results. Finally, by comparing the calculation results of multiple sections, the operation risks of the power grid can be clearly seen, which significantly improves the efficiency of power grid section verification research. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The present invention is a flow chart of a multi-section verification method suitable for online safety analysis research. DETAILED DESCRIPTION

[0038] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0039] The present invention discloses a multi-section verification method suitable for online safety analysis and research. In this embodiment, the method specifically includes the following steps:

[0040] Step S1) obtains the power grid model and operation data through data processing in the real-time state of online safety analysis, compresses and stores them in the / home / nusp / data / dsa directory, and adds records to the database section case index table to describe the basic situation of the case, thereby realizing data section case storage.

[0041] At the same time, the total power generation, total load, new energy and key section power of the entire network / region in all data section cases are counted, and the power grid characteristics of each data section case are identified. According to the day, week, month and year, the maximum / minimum total power generation, maximum / minimum load, maximum / minimum new energy power generation, and maximum / minimum key section data section cases of the entire network and each partition are identified as special section cases to realize the power grid characteristics identification of data section cases. The example of the database section case index table is as follows:

[0042]

[0043] Automatic management of data section cases is carried out according to the set storage duration and the principle of "close and dense, far and sparse", including: automatic deletion of section cases that exceed the maximum storage duration, and random deletion of section cases that exceed the remote duration. The random deletion is to re-manage the section cases stored in the original cycle of 5 minutes into a new cycle of 15 minutes to reduce storage space occupation.

[0044] Step S2) Based on the stored data section cases, the dispatching staff selects multiple sets of data section cases and sets the reference section from them to realize online research state multi-section case loading, including:

[0045] Rapid screening of data section cases: quickly screen the data section cases to be studied by specifying time periods and grid characteristics. Provide manual settings for start time, end time, and section type on the human-computer interaction program, and quickly screen out cases that meet the search criteria after confirmation.

[0046] Multiple section cases are loaded, and the data section cases to be studied are screened out. After confirmation by the dispatching and operation personnel, the power grid equipment model and data of the benchmark section are obtained and loaded into the real-time library table of the power dispatching technical support system for screen display and calculation.

[0047] The loading of the real-time library table is to load the power grid equipment model and data into the computer memory to improve the data processing speed.

[0048] Step S3) Based on the model and data of the reference section, the grid operation mode is adjusted according to the calculation requirements. At the same time, all adjustment operations under the reference section are cached. When other check sections are calculated, they are automatically applied to other sections to be checked to avoid repeated adjustments and realize online research state multi-section mode adjustment. Among them, the operation mode adjustment includes:

[0049] Graphical adjustment, based on the real-time database table of the power dispatching technical support system, can intuitively adjust the mode of power grid equipment on the flow chart and plant station chart, including: equipment startup / shutdown, switch position change, power generation / load setting, etc., to intuitively display the flow changes before and after the adjustment of the power grid operation mode. Graphical adjustment can only be carried out for a single device.

[0050] Batch adjustment of power generation and load supports batch adjustment of power generation and load of the entire network / region in the form of a list. According to the principle of equal proportion, the power generation / load adjustment value is allocated to each unit / load taking into account the upper / lower limit of the unit output and the lower limit of the load not less than 0. Batch adjustment of power generation and load can adjust multiple devices at the same time, reducing the amount of manual adjustment. The equal proportion means that the adjustment amount is evenly distributed to each adjustment device based on the total adjustment amount and all adjustment devices.

[0051] All mode adjustment operation caches under the reference section are automatically applied to other sections to be checked, which means automatically recording the equipment, operation type and operation amount involved in the mode adjustment under the reference mode, and caching them into the operation file, for example: XX line, shutdown, 0; XX unit, power adjustment, -300. When other sections are loaded into the real-time library, the program reads the operation file and automatically performs the operation mode adjustment to avoid repeated adjustments.

[0052] Step S4) Based on the adjusted grid operation mode, calculation parameters and task settings, a reference section calculation data package is formed and sent to the online analysis parallel computing platform for parallel computing. At the same time, the grid equipment model and operation data in the next section to be checked are automatically loaded, and the adjustment operation in the reference section is automatically applied to form the next section calculation data package to be checked, until all sections to be checked are rollingly generated calculation data packages.

[0053] Among them, the calculation parameters and task settings include:

[0054] The calculation tasks are customized, and the calculation functions that need to be analyzed and verified in this research section are manually set, including: static safety analysis, short-circuit current calculation, short-circuit ratio analysis, transient stability analysis, stability margin analysis, static voltage stability analysis, small disturbance stability analysis, etc.

[0055] The expected fault set is customized, and the expected fault set for this analysis and verification is set on the power flow diagram, plant station diagram or data maintenance tool of the power dispatching technical support system, including: AC line fault, transformer fault, bus fault, generator fault, DC fault, etc.

[0056] Specifically, the steps for calculating the rolling generation of data packets are as follows:

[0057] 4.1) Based on the adjusted grid operation mode, flow data and stability data are generated. The flow data includes power generation, load injection amount, winding joint position, grid topology, equipment static parameters (including upper and lower limits, impedance parameters). The stability data includes unit excitation, speed regulator, prime mover parameters, DC control model parameters, load static model parameters, motor model parameters, etc.

[0058] 4.2) Based on the set calculation tasks and expected failures, the application function input data and expected failure data to be calculated are generated;

[0059] 4.3) Pack the power flow data, stability data, application function input data, and expected fault data to generate a data packet to be calculated;

[0060] 4.4) Prioritize the generation of calculation data packages for benchmark section cases. After the calculation data packages for benchmark section cases are generated, the next section case is automatically loaded into the real-time library in sequence;

[0061] 4.5) Automatically adjust the operation mode of the next section case according to the cached operation file;

[0062] 4.6) Repeat the above steps to form the calculation data package of the next cross-section case, until the calculation data packages of all cross-section cases are generated.

[0063] Step S5) Based on the calculation data packets generated in the previous step, the parallel computing platform performs parallel calculations one by one in the order in which the data packets are generated, and uploads the calculation results after the calculation is completed to form a calculation result package. At the same time, the next calculation data packet is obtained to perform parallel calculations until the calculation data packets of all the verified sections are calculated, thus realizing the safe and stable rolling analysis of multiple sections in the online research state.

[0064] Step S6) According to the calculation result package formed in S5, the storage program is called to write it into the database for screen display, and the calculation results in each verification section are cached as result cases for subsequent review and use. For functions such as static safety analysis and short-circuit current, the verification results under different data section cases can be obtained by component, and compared and displayed, so that the dispatching operation personnel can quickly grasp the operation risk of different components under each section.

[0065] The present invention also discloses a multi-section data verification device for an online safety analysis system of a power grid, comprising:

[0066] A data section case storage module is used to obtain power grid models and operation data through real-time data processing of the power grid online safety analysis system, and store data section cases;

[0067] The grid feature identification module is used to count the power generation and load in all data section cases according to the entire network / region, and identify the grid features of the data section cases;

[0068] A multi-section case loading module is used to construct a multi-section case, select a data section case from it and set it as a reference section, and load the multi-section case for the online research state of the power grid online safety analysis system;

[0069] A power grid operation mode adjustment module is used to adjust the power grid operation mode according to the model and data of the reference section, automatically apply the corresponding mode adjustment of the reference section to other data section cases in the multi-section case, and realize the multi-section mode adjustment of the online research state;

[0070] The dynamic analysis and display module is used to carry out rolling online research-state multi-section safety and stability analysis based on the adjusted power grid operation mode, calculation parameters and task settings; based on the multi-section safety and stability analysis results, the comparison and display of the online research-state multi-section verification results are realized.

Claims

1. A multi-section verification method suitable for online safety analysis research, characterized in that: include: Acquire the power grid model and operation data through real-time data processing of the power grid online safety analysis system, and store data section cases, wherein the data section cases include the power grid model, operation data, data section time, data size and data storage time; Count the power generation and load in all data section cases by the entire network / region, and identify the grid characteristics of the data section cases; The dispatching operation personnel select multiple sets of the data section cases to construct a multi-section case, and select one data section case from them to set as a reference section, and load the multi-section case for the online research state of the power grid online safety analysis system; According to the model and data of the reference section, the operation mode of the power grid is adjusted, and the corresponding mode of the reference section is automatically applied to other data section cases in the multi-section case to achieve the multi-section mode adjustment in the online research state; Based on the adjusted grid operation mode, calculation parameters and setting tasks, online research state multi-section safety and stability analysis is carried out on a rolling basis. Based on the multi-section safety and stability analysis results, a comparative display of online research state multi-section verification results is achieved.

2. The multi-section verification method according to claim 1, characterized in that: The storage data section case is to periodically obtain the power grid model and operation data in the real-time state of online safety analysis, compress and store them in the configuration directory, and add records in the database section case index table, wherein the records include the data section time, data size, and data saving time.

3. The multi-section verification method according to claim 2, characterized in that: Set the storage duration, automatically delete data section cases that exceed the maximum storage duration, and delete data section cases that exceed the remote duration at a random point. The random point deletion is to re-manage the section cases stored in the original period and turn them into new period storage.

4. The multi-section verification method according to claim 1, characterized in that: The identification of the power grid characteristics of the data section cases refers to identifying the power grid characteristics of each data section case by collecting the total power generation, total load, new energy and key section power in the entire network / region in the data section cases, and at the same time identifying the maximum / minimum total power generation, maximum / minimum load, maximum / minimum new energy power generation, and maximum / minimum key section data section cases for the entire network and each sub-region on a daily, weekly, monthly and yearly basis as special data section cases for dispatching and operation personnel to quickly screen.

5. The multi-section verification method according to claim 1, characterized in that: The above is a case of loading multiple sections in an online research state, including: Rapid screening of data section cases: quickly screening data section cases to be studied by specifying time periods and grid characteristics; Multi-section case loading, screened data section cases to be studied, after confirmation by dispatching and operating personnel, obtain the power grid equipment model and data of the benchmark section, and load them into the real-time library table of the power dispatching technical support system.

6. The multi-section verification method according to claim 1, characterized in that: The multi-section mode adjustment of the online research state includes: Graphical adjustment, based on the real-time database table of the power dispatching technical support system, can directly adjust the mode of power grid equipment on the power flow diagram and plant station diagram, including: equipment startup / shutdown, switch position change, power generation / load setting, etc., intuitively displaying the power flow changes before and after the power grid operation mode adjustment; Batch adjustment of power generation and load supports batch adjustment of power generation and load of the entire network / region in the form of a list. According to the principle of equal proportion, the power generation / load adjustment value is allocated to each unit / load taking into account the upper / lower limit of the unit output and the lower limit of the load not less than 0. The adjustment method is automatically applied. By caching all the adjustment operations performed under the benchmark section, when other sections to be verified are loaded, the cached adjustment operations are automatically applied to the new section data, avoiding repeated adjustments and improving work efficiency.

7. The multi-section verification method according to claim 1, characterized in that: The calculation parameters and setting tasks include: The calculation tasks are customized, and the dispatching and operation personnel set the calculation functions that need to be analyzed and verified for this research section, including static safety analysis, short-circuit current calculation, short-circuit ratio analysis, transient stability analysis, stability margin analysis, static voltage stability analysis, and small disturbance stability analysis; The expected fault set is customized, and the expected fault set for this analysis and verification is set on the power flow diagram, plant station diagram or data maintenance tool of the power dispatching technical support system, including AC line fault, transformer fault, bus fault, generator fault and DC fault.

8. The multi-section verification method according to claim 1, characterized in that: Rolling online research state multi-section safety and stability analysis means that the online research state sends the calculation data package of the benchmark section to the online analysis parallel computing platform, and carries out parallel calculation according to the expected faults; At the same time, the power grid equipment model and data of the next data section to be verified are automatically loaded into the real-time library table of the new generation dispatching technical support system, and the adjustment operation in the reference section is automatically applied to form the calculation data package of the next section to be verified, until all sections to be verified have generated calculation data packages; After the online analysis parallel computing platform completes the parallel computing of the benchmark section calculation data package, it uploads the calculation results and simultaneously obtains the next section calculation data package to be verified to carry out parallel computing until the calculation data packages of all verified sections are completed.

9. The multi-section verification method according to claim 1, characterized in that: Online research multi-section verification result display, including: The parallel calculation results are stored in the database, and the section verification results returned by the online analysis parallel calculation platform are obtained and written into the database for screen display. At the same time, the calculation results in each verification section are cached as result cases for subsequent review and use; Comparison of multi-section verification results. For static safety analysis, short-circuit current and other functions, verification results under different data section cases are obtained by component, and compared and displayed, so that dispatching and operation personnel can quickly understand the operating risks of different components in each section.

10. A multi-section verification device suitable for online safety analysis and research, characterized in that: include: A data section case storage module is used to obtain power grid models and operation data through real-time data processing of the power grid online safety analysis system, and store data section cases; The grid feature identification module is used to count the power generation and load in all data section cases according to the entire network / region, and identify the grid features of the data section cases; A multi-section case loading module is used to construct a multi-section case, select a data section case from it and set it as a reference section, and load the multi-section case for the online research state of the power grid online safety analysis system; A power grid operation mode adjustment module is used to adjust the power grid operation mode according to the model and data of the reference section, automatically apply the corresponding mode adjustment of the reference section to other data section cases in the multi-section case, and realize the multi-section mode adjustment of the online research state; Dynamic analysis and display module, which is used to carry out online research state multi-section safety and stability analysis based on the adjusted grid operation mode, calculation parameters and task settings; Based on the safety and stability analysis results of multiple sections, the comparison and display of the verification results of multiple sections in the online research state is realized.

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