CN111611663B - Simulation fault generation method and device for power system - Google Patents
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Abstract
The invention discloses a power system simulation fault generation method, which comprises the following steps: reading a power flow data file of the power system, and acquiring a basic topological structure of the power system according to the power flow data file; identifying a fault topology node of the power system according to the tide data file and the power system basic topology structure, and acquiring topology information of the fault topology node; identifying a fault setting element of the power system and topology information of the fault topology node according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system; according to the topology information of the fault setting element, the fault type is set, the required simulation fault is generated, the accurate analysis of the topology structure of the power system can be realized, the fault requirement applicable to the simulation of the power system can be quickly and completely generated, and the safe and stable operation of the power grid is ensured. The invention also discloses a device for generating the simulation faults of the power system.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a power system simulation fault generation method and device.
Background
The safe and stable operation of the power grid is significant to national economy, the power grid is developed continuously along with the continuous development of the national economy, the operation environment of the power system is more complex, and the requirements on the safe and stable operation of the power grid are higher.
To ensure safe and stable operation of the power grid, a large amount of system research work is required to be performed to research effective measures for maintaining stable operation of the system under various operation states, so that a large amount of fault simulation calculation is required to be performed, and a complete and reasonable simulation fault set is required to be provided. Besides filling in the simulation faults manually, the simulation fault sets of different types can be automatically generated in batches by analyzing the topological structure of the power system, and the efficiency and the accuracy are basically ensured. However, simple topology analysis of the power system often results in incomplete and unreasonable fault sets, and may not meet the generation requirements of all types of faults.
Disclosure of Invention
The embodiment of the invention provides a power system simulation fault generation method and device, which can accurately analyze the topology structure of a power system, quickly and completely generate fault requirements suitable for power system simulation and ensure safe and stable operation of a power grid.
An embodiment of the present invention provides a method for generating a simulation fault of an electric power system, including:
reading a power flow data file of the power system, and acquiring a basic topological structure of the power system according to the power flow data file;
identifying a fault topology node of the power system according to the tide data file and the power system basic topology structure, and acquiring topology information of the fault topology node;
identifying a fault setting element of the power system and topology information of the fault topology node according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system;
and setting fault types according to the topology information of the fault setting element, and generating required simulation faults.
As an improvement of the above solution, the identifying a fault topology node of the power system according to the tide data file and the power system base topology structure, and obtaining topology information of the fault topology node include:
according to the basic topological structure of the power system, when two nodes are connected through a small-impedance branch or two nodes are connected through a series compensation branch, the two nodes are identified as the same fault topological node; the small-impedance branch circuit meets the first reactance per unit value requirement, and the series compensation branch circuit meets the second reactance per unit value requirement.
As an improvement of the above solution, the identifying a fault topology node of the power system according to the power flow data file and the power system base topology structure, and obtaining topology information of the fault topology node further includes:
identifying topology information of each direct current according to the type of the data card in the tide data file; the topology information of the direct current comprises direct current nodes and direct current lines;
and distinguishing different direct current systems according to the connection relation between the direct current system and the alternating current system in the basic topological structure of the power system, and obtaining the number of direct current poles, the converter bus and the capacity of the filter input by the direct current converter bus.
As an improvement of the above solution, the identifying a fault topology node of the power system according to the power flow data file and the power system base topology structure, and obtaining topology information of the fault topology node further includes:
identifying a generator node according to the type of the data card in the tide data file;
and obtaining a high-voltage side bus node of the power plant according to the step-up transformer connected with the generator node.
As an improvement of the above solution, the identifying a fault topology node of the power system according to the power flow data file and the power system base topology structure, and obtaining topology information of the fault topology node further includes:
identifying three two-winding transformer data cards belonging to the same three-winding transformer according to all the two-winding transformer data cards in the tide data file;
according to the three two-winding transformer data cards, topology information of the three-winding transformer is obtained; the topology information of the three-winding transformer comprises high, medium and low voltage three-side nodes, branches and virtual neutral nodes.
As an improvement of the above solution, the identifying the fault setting element of the power system and its topology information according to the topology information of the fault topology node, setting the fault type according to the topology information of the fault setting element, and generating the required simulation fault includes:
judging whether different lines are parallel lines or not according to the topology information of the fault topology nodes;
when the nodes at the two sides of the two-circuit line are the same fault topology node, the two-circuit line is considered to be a parallel line, and a line N-2 fault is generated.
As an improvement of the above solution, the identifying the fault setting element of the power system and its topology information according to the topology information of the fault topology node, setting the fault type according to the topology information of the fault setting element, and generating the required simulation fault, further includes:
according to the topology information of the direct current, the number of direct current poles, the capacity of the filter put into the bus of the converter station at the rectifying side and the inverting side and the preset blocking number of poles, calculating the capacity of the filter which needs to be cut off simultaneously during blocking according to a preset proportion; wherein the preset proportion consists of the direct current pole number and the preset locking pole number;
and generating a direct current blocking fault according to the capacity of the filter which needs to be cut off at the same time during blocking.
As an improvement of the above solution, the identifying the fault setting element of the power system and its topology information according to the topology information of the fault topology node, setting the fault type according to the topology information of the fault setting element, and generating the required simulation fault, further includes:
judging whether the line is a power plant delivery channel line or not according to the power plant high-voltage side bus node;
when the power plant is provided with two or more power plant outgoing channel lines, generating a power plant outgoing line N-1.5 fault;
when the power plant is provided with two or more power plant outgoing channel lines and the bus nodes on the opposite sides of the outgoing channel lines are not identical in fault topology nodes, N-1.5 faults of various line combinations are generated.
As an improvement of the above solution, the setting a fault type according to topology information of the topology node, and generating a required simulation fault, further includes:
judging whether different high-voltage side nodes of the transformer are the same fault topology node or not through bus recognition according to the topology information of the three-winding transformer; if yes, the three-winding transformer corresponding to the high-voltage side node of the transformer is considered to be a parallel transformer;
when three or more three-winding transformers are connected in parallel, judging whether the voltage side nodes in the three-winding transformers connected in parallel are the same fault topology node or not; if yes, generating a combined transformer N-2 fault; if not, generating a plurality of different combinations of faults of the transformer N-2.
Another embodiment of the present invention correspondingly provides a power system simulation fault generating device, including:
the data acquisition module is used for reading a power flow data file of the power system and acquiring a basic topological structure of the power system according to the power flow data file;
the analysis module is used for identifying fault topology nodes of the power system according to the tide data file and the power system basic topology structure and obtaining topology information of the fault topology nodes;
the identification module is used for identifying a fault setting element of the power system and topology information thereof according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system;
and the fault generation module is used for setting fault types according to the topology information of the fault setting element and generating required simulation faults.
Compared with the prior art, the power system simulation fault generation method and device disclosed by the embodiment of the invention have the advantages that the power system basic topological structure is acquired by reading the power flow data file of the power system and according to the power flow data file, the fault topological node of the power system is identified according to the power flow data file and the power system basic topological structure, the topological information of the fault topological node is acquired, the fault setting element of the power system and the topological information thereof are identified according to the topological information of the fault topological node, wherein the fault setting element comprises a circuit, a three-winding transformer, a power plant and a direct current system, the fault type is set according to the topological information of the fault setting element, and the required simulation fault is generated.
Drawings
Fig. 1 is a schematic flow chart of a power system simulation fault generation method according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power system simulation fault generating device according to a second embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flowchart of a power system simulation fault generation method according to an embodiment of the present invention is shown, where the method includes steps S101 to S104.
S101, reading a power flow data file of the power system, and acquiring a basic topological structure of the power system according to the power flow data file.
In this embodiment, the basic topology structure of the power system includes basic information such as an area, a partition, a node, a voltage level, a node connection relationship, and the like.
S102, identifying fault topology nodes of the power system according to the tide data file and the power system basic topology structure, and acquiring topology information of the fault topology nodes.
In a preferred embodiment, step S102 includes:
according to the basic topological structure of the power system, when two nodes are connected through a small-impedance branch or two nodes are connected through a series compensation branch, the two nodes are identified as the same fault topological node; the small-impedance branch circuit meets the first reactance per unit value requirement, and the series compensation branch circuit meets the second reactance per unit value requirement.
In this embodiment, the bus of the power system is identified according to the basic information of the nodes and the lines in the basic topology of the power system. Specifically, the first reactance per unit value is required to be abs (x) less than or equal to 0.0001p.u., and the second reactance per unit value is required to be x less than 0, so that if two nodes are connected through a small impedance branch (the reactance per unit value abs (x) less than or equal to 0.0001 p.u.), the two nodes are considered to belong to the same bus; if two nodes are connected through a serial compensation branch (the reactance per unit value x is smaller than 0), the two nodes are considered to belong to the same bus.
In a preferred embodiment, step S102 further comprises:
identifying topology information of each direct current according to the type of the data card in the tide data file; the topology information of the direct current comprises direct current nodes and direct current lines;
and distinguishing different direct current systems according to the connection relation between the direct current system and the alternating current system in the basic topological structure of the power system, and obtaining the number of direct current poles, the converter bus and the capacity of the filter input by the direct current converter bus.
In this embodiment, the dc node and the dc line are identified according to the type of the data card, and then different dc systems are distinguished according to the connection relationship between the dc and ac systems, so as to obtain the number of dc poles, the converter node, and the capacity of the filter to which the dc is added.
In a preferred embodiment, step S102 further comprises:
identifying a generator node according to the type of the data card in the tide data file;
and obtaining a high-voltage side bus node of the power plant according to the step-up transformer connected with the generator node.
In a preferred embodiment, step S102 further comprises:
identifying three two-winding transformer data cards belonging to the same three-winding transformer according to all the two-winding transformer data cards in the tide data file;
according to the three two-winding transformer data cards, topology information of the three-winding transformer is obtained; the topology information of the three-winding transformer comprises high, medium and low voltage three-side nodes, branches and virtual neutral nodes.
In this embodiment, the three-winding transformers in the power flow data file are filled in the form of three two-winding transformer data cards, so that three two-winding transformer data cards belonging to the same three-winding transformer are identified from all the two-winding transformer data cards, and topology information of the three-winding transformers is obtained. It should be noted that, only the nodes connected to the other three nodes with different voltage levels through the three two-winding transformer data cards are virtual neutral points of the three-winding transformer, and then the three two-winding transformer data cards together form the tide data of the three-winding transformer.
S103, identifying a fault setting element of the power system and topology information of the fault topology node according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system.
S104, setting fault types according to the topology information of the fault setting element, and generating required simulation faults.
Preferably, the fault setting in this embodiment further includes: fault type, zone division, voltage class, consideration (e.g., one-side fault, two-side fault, unipolar blocking, bipolar blocking, single-phase fault, three-phase fault), and fault timing are set.
In the present invention, fault types include, but are not limited to, line N-2 faults, DC blocking faults, power plant outlet N-1.5 faults, and three winding transformer trip faults.
In a preferred embodiment, according to the topology information of the fault topology node, judging whether different lines are parallel lines or not;
when the nodes at the two sides of the two-circuit line are the same fault topology node, the two-circuit line is considered to be a parallel line, and a line N-2 fault is generated.
It should be noted that, for the dual-circuit line, nodes on two sides of the dual-circuit line are the same, and the N-2 fault can be generated by simple topology analysis. However, for the double-circuit line with different nodes at two sides of the double-circuit line, such as the same-tower double-circuit line with serial compensation, bus nodes at two sides of the line in tide data are respectively connected with two serial compensation nodes through branches, the names of the two serial compensation nodes are different, and no direct connection branch is arranged between the two serial compensation nodes. Ordinary topology resolution cannot generate an N-2 fault for this dual-loop line. Therefore, by identifying the bus, two series compensation nodes are identified as the same bus, and then the N-2 fault of the double-circuit line can be generated.
In a preferred embodiment, according to the topology information of the direct current, the number of direct current poles, the capacity of filters put into the bus bars of the rectifying side and the inverting side converter station and the preset blocking pole number, calculating the capacity of the filters to be cut off simultaneously during blocking according to a preset proportion; wherein the preset proportion consists of the direct current pole number and the preset locking pole number;
and generating a direct current blocking fault according to the capacity of the filter which needs to be cut off at the same time during blocking.
The topology information of the respective direct currents, the number n of direct current poles, and the filter capacities put on the rectifying-side and inverting-side converter station bus bars are obtained by means of direct current identification, for example. And further, calculating the capacity of the filter to be cut off simultaneously during locking according to the preset locking pole number m and the preset proportion of m/n, thereby generating a direct current locking fault.
In a preferred embodiment, determining whether the line is a power plant outgoing channel line based on the power plant high side bus node;
when the power plant is provided with two or more power plant outgoing channel lines, generating a power plant outgoing line N-1.5 fault;
when the power plant is provided with two or more power plant outgoing channel lines and the bus nodes on the opposite sides of the outgoing channel lines are not identical in fault topology nodes, N-1.5 faults of various line combinations are generated.
It should be noted that the power plant outgoing line N-1.5 fault is specifically a one-circuit permanent fault and a one-circuit transient fault in the two-circuit line of the power plant outgoing channel. In this embodiment, the power plant bus node is obtained through power plant bus identification, so as to determine whether the line is sent out of the channel line by the power plant, and only for the power plant with only two outgoing lines (including the case of the bus on the other side being different from the bus), the power plant outgoing line N-1.5 fault is generated.
In a preferred embodiment, according to topology information of the three-winding transformer, judging whether different high-voltage side nodes of the transformer are the same fault topology node through bus recognition; if yes, the three-winding transformer corresponding to the high-voltage side node of the transformer is considered to be a parallel transformer;
when three or more three-winding transformers are connected in parallel, judging whether the voltage side nodes in the three-winding transformers connected in parallel are the same fault topology node or not; if yes, generating a combined transformer N-2 fault; if not, generating a plurality of different combinations of faults of the transformer N-2.
The three-winding transformer tripping faults are cut off simultaneously by identifying the three-winding transformers, and the three-winding transformer tripping faults are cut off simultaneously by the three-winding transformer. Further, judging whether the high-voltage side nodes of the transformer are the same bus or not through bus identification, and judging whether the transformers are connected in parallel or not; furthermore, for N parallel transformers, if the medium voltage side nodes belong to different buses, a plurality of different combination fault conditions need to be output when generating the N-2 fault.
According to the power system simulation fault generation method provided by the embodiment of the invention, a power system basic topological structure is obtained by reading a power flow data file of a power system and according to the power flow data file, fault topological nodes of the power system are identified according to the power flow data file and the power system basic topological structure, and topology information of the fault topological nodes is obtained, and a fault setting element of the power system and the topology information thereof are identified according to the topology information of the fault topological nodes, wherein the fault setting element comprises a circuit, a three-winding transformer, a power plant and a direct current system, and a fault type is set according to the topology information of the fault setting element, so that a required simulation fault is generated, the power system topological structure can be automatically and accurately analyzed, the fault requirement applicable to power system simulation can be quickly and completely generated, the accuracy and the rationality of a simulation fault set can be effectively improved, and the safe and stable operation of a power grid can be ensured.
Referring to fig. 2, a schematic structural diagram of a power system simulation fault generating device according to a second embodiment of the present invention includes:
the data acquisition module 201 is configured to read a power flow data file of the power system, and acquire a basic topology structure of the power system according to the power flow data file;
the analysis module 202 is configured to identify a fault topology node of the power system according to the tide data file and the power system base topology structure, and obtain topology information of the fault topology node;
an identification module 203, configured to identify a fault setting element of the power system and topology information thereof according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system;
the fault generating module 204 is configured to set a fault type according to topology information of the fault setting element, and generate a required simulation fault.
Preferably, the parsing module 202 includes:
the bus identification unit is used for identifying two nodes as the same fault topological node according to the basic topological structure of the power system when the two nodes are connected through a small-impedance branch or connected through a series compensation branch; the small-impedance branch circuit meets the first reactance per unit value requirement, and the series compensation branch circuit meets the second reactance per unit value requirement.
Preferably, the parsing module 202 further includes:
the direct current topology information analysis unit is used for identifying the topology information of each direct current according to the type of the data card in the tide data file; the topology information of the direct current comprises direct current nodes and direct current lines;
and the direct current identification unit is used for distinguishing different direct current systems according to the connection relation between the direct current system and the alternating current system in the basic topological structure of the power system, and acquiring the number of direct current poles, the converter bus and the capacity of the filter input by the direct current converter bus.
Preferably, the parsing module 202 further includes:
the generator node identification unit is used for identifying generator nodes according to the type of the data card in the tide data file;
and the power plant high-voltage side bus node identification unit is used for acquiring the power plant high-voltage side bus node according to the step-up transformer connected with the generator node.
Preferably, the parsing module 202 further includes:
the three-winding transformer identification unit is used for identifying three two-winding transformer data cards belonging to the same three-winding transformer according to all the two-winding transformer data cards in the tide data file;
the topology information acquisition unit is used for acquiring the topology information of the three-winding transformer according to the three two-winding transformer data cards; the topology information of the three-winding transformer comprises high, medium and low voltage three-side nodes, branches and virtual neutral nodes.
Preferably, the identifying module 203 and the fault generating module 204 include:
the parallel line judging unit is used for judging whether different lines are parallel lines according to the topology information of the fault topology node;
and the line N-2 fault generating unit is used for considering the two-circuit line as a parallel line to generate a line N-2 fault when nodes at two sides of the two-circuit line are the same fault topology node.
Preferably, the identifying module 203 and the fault generating module 204 include:
the direct current blocking fault calculation unit is used for calculating the filter capacity which needs to be cut off simultaneously during blocking according to the topological information of the direct current, the number of direct current poles, the capacity of the filter put on the bus of the rectifying side and the inverting side convertor station and the preset blocking number of poles and the preset proportion; wherein the preset proportion consists of the direct current pole number and the preset locking pole number;
and the direct current blocking fault generating unit is used for generating direct current blocking faults according to the capacity of the filter which needs to be cut off at the same time during blocking.
Preferably, the identifying module 203 and the fault generating module 204 include:
the power plant delivery channel line judging unit is used for judging whether the line is a power plant delivery channel line according to the high-voltage side bus node of the power plant;
the power plant outgoing line N-1.5 fault generating unit is used for generating a power plant outgoing line N-1.5 fault when the power plant is provided with two or more power plant outgoing channel lines;
and the N-1.5 fault generating unit of the multiple line combinations is used for generating N-1.5 faults of the multiple line combinations when the power plant is provided with two or more power plant outgoing channel lines and the bus nodes on the opposite sides of the outgoing channel lines are not identical in fault topology nodes.
Preferably, the identifying module 203 and the fault generating module 204 include:
the parallel transformer judging unit is used for judging whether the nodes on the high-voltage side of different transformers are the same fault topological node or not through bus recognition according to the topological information of the three-winding transformer; if yes, the three-winding transformer corresponding to the high-voltage side node of the transformer is considered to be a parallel transformer;
the three-winding transformer fault generating unit is used for judging whether the voltage side nodes in the three-winding transformers connected in parallel are the same fault topology node when three or more three-winding transformers are connected in parallel; if yes, generating a combined transformer N-2 fault; if not, generating a plurality of different combinations of faults of the transformer N-2.
According to the power system simulation fault generating device provided by the embodiment of the invention, a power system basic topological structure is obtained by reading a power flow data file of a power system and according to the power flow data file, fault topological nodes of the power system are identified according to the power flow data file and the power system basic topological structure, and topology information of the fault topological nodes is obtained, and a fault setting element of the power system and the topology information thereof are identified according to the topology information of the fault topological nodes, wherein the fault setting element comprises a circuit, a three-winding transformer, a power plant and a direct current system, and a fault type is set according to the topology information of the fault setting element, so that a required simulation fault is generated.
It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the invention, the connection relation between the modules represents that the modules have communication connection, and can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (8)
1. A method for generating a simulated fault in an electrical power system, comprising:
reading a power flow data file of the power system, and acquiring a basic topological structure of the power system according to the power flow data file;
identifying a fault topology node of the power system according to the tide data file and the power system basic topology structure, and acquiring topology information of the fault topology node;
identifying a fault setting element of the power system and topology information of the fault topology node according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system;
setting fault types according to the topology information of the fault setting element, and generating required simulation faults;
the identifying the fault topology node of the power system according to the tide data file and the power system basic topology structure, and obtaining topology information of the fault topology node, includes:
according to the basic topological structure of the power system, when two nodes are connected through a small-impedance branch or two nodes are connected through a series compensation branch, the two nodes are identified as the same fault topological node; the small impedance branch circuit meets the first reactance per unit value requirement, and the series compensation branch circuit meets the second reactance per unit value requirement;
identifying topology information of each direct current according to the type of the data card in the tide data file; the topology information of the direct current comprises direct current nodes and direct current lines;
and distinguishing different direct current systems according to the connection relation between the direct current system and the alternating current system in the basic topological structure of the power system, and obtaining the number of direct current poles, the converter bus and the capacity of the filter input by the direct current converter bus.
2. The power system simulation fault generation method according to claim 1, wherein the identifying a fault topology node of the power system according to the power flow data file and the power system base topology structure, and obtaining topology information of the fault topology node, further comprises:
identifying a generator node according to the type of the data card in the tide data file;
and obtaining a high-voltage side bus node of the power plant according to the step-up transformer connected with the generator node.
3. The power system simulation fault generation method according to claim 1, wherein the identifying a fault topology node of the power system according to the power flow data file and the power system base topology structure, and obtaining topology information of the fault topology node, further comprises:
identifying three two-winding transformer data cards belonging to the same three-winding transformer according to all the two-winding transformer data cards in the tide data file;
according to the three two-winding transformer data cards, topology information of the three-winding transformer is obtained; the topology information of the three-winding transformer comprises high, medium and low voltage three-side nodes, branches and virtual neutral nodes.
4. The power system simulation fault generation method according to claim 1, wherein the step of identifying a fault setting element of the power system and topology information thereof based on the topology information of the fault topology node, setting a fault type based on the topology information of the fault setting element, and generating a required simulation fault includes:
judging whether different lines are parallel lines or not according to the topology information of the fault topology nodes;
when the nodes at the two sides of the two-circuit line are the same fault topology node, the two-circuit line is considered to be a parallel line, and a line N-2 fault is generated.
5. The power system simulation fault generation method according to claim 1, wherein the step of identifying a fault setting element of the power system and topology information thereof based on the topology information of the fault topology node, setting a fault type based on the topology information of the fault setting element, and generating a required simulation fault further comprises:
according to the topology information of the direct current, the number of direct current poles, the capacity of the filter put into the bus of the converter station at the rectifying side and the inverting side and the preset blocking number of poles, calculating the capacity of the filter which needs to be cut off simultaneously during blocking according to a preset proportion; wherein the preset proportion consists of the direct current pole number and the preset locking pole number;
and generating a direct current blocking fault according to the capacity of the filter which needs to be cut off at the same time during blocking.
6. The power system simulation fault generating method as claimed in claim 3, wherein the step of identifying the fault setting element of the power system and the topology information thereof based on the topology information of the fault topology node, setting the fault type based on the topology information of the fault setting element, and generating the required simulation fault further comprises:
judging whether the line is a power plant delivery channel line according to a high-voltage side bus node of the power plant;
when the power plant is provided with two or more power plant outgoing channel lines, generating a power plant outgoing line N-1.5 fault;
when the power plant is provided with two or more power plant outgoing channel lines and the bus nodes on the opposite sides of the outgoing channel lines are not identical in fault topology nodes, N-1.5 faults of various line combinations are generated.
7. The power system simulation fault generation method according to claim 3 or 4, wherein the setting of fault types according to topology information of the topology nodes generates a required simulation fault, further comprising:
judging whether different high-voltage side nodes of the transformer are the same fault topology node or not through bus recognition according to the topology information of the three-winding transformer; if yes, the three-winding transformer corresponding to the high-voltage side node of the transformer is considered to be a parallel transformer;
when three or more three-winding transformers are connected in parallel, judging whether the voltage side nodes in the three-winding transformers connected in parallel are the same fault topology node or not; if yes, generating a combined transformer N-2 fault; if not, generating a plurality of different combinations of faults of the transformer N-2.
8. An electric power system simulation fault generating device, characterized by comprising:
the data acquisition module is used for reading a power flow data file of the power system and acquiring a basic topological structure of the power system according to the power flow data file;
the analysis module is used for identifying fault topology nodes of the power system according to the tide data file and the power system basic topology structure and obtaining topology information of the fault topology nodes;
the identification module is used for identifying a fault setting element of the power system and topology information thereof according to the topology information of the fault topology node; the fault setting element comprises a line, a three-winding transformer, a power plant and a direct current system;
the fault generation module is used for setting fault types according to the topology information of the fault setting element and generating required simulation faults;
wherein, the parsing module includes:
the bus identification unit is used for identifying two nodes as the same fault topological node according to the basic topological structure of the power system when the two nodes are connected through a small-impedance branch or connected through a series compensation branch; the small impedance branch circuit meets the first reactance per unit value requirement, and the series compensation branch circuit meets the second reactance per unit value requirement;
the direct current topology information analysis unit is used for identifying the topology information of each direct current according to the type of the data card in the tide data file; the topology information of the direct current comprises direct current nodes and direct current lines;
and the direct current identification unit is used for distinguishing different direct current systems according to the connection relation between the direct current system and the alternating current system in the basic topological structure of the power system, and acquiring the number of direct current poles, the converter bus and the capacity of the filter input by the direct current converter bus.
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