CN111475923A - Electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear - Google Patents
Electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear Download PDFInfo
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- CN111475923A CN111475923A CN202010179880.9A CN202010179880A CN111475923A CN 111475923 A CN111475923 A CN 111475923A CN 202010179880 A CN202010179880 A CN 202010179880A CN 111475923 A CN111475923 A CN 111475923A
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- sulfur hexafluoride
- hexafluoride gas
- insulated switchgear
- electromagnetic transient
- gas insulated
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 55
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 55
- 230000001052 transient effect Effects 0.000 title claims abstract description 41
- 238000004458 analytical method Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 14
- 238000004364 calculation method Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000010586 diagram Methods 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
Abstract
The invention relates to an electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear, which comprises the following steps: acquiring a structure diagram, a size parameter and a material parameter of sulfur hexafluoride gas insulation switch equipment to be analyzed; establishing a field calculation model based on a finite element analysis method, and extracting the capacitance, inductance and resistance of a circuit breaker and a disconnecting link of sulfur hexafluoride gas insulated switchgear; establishing a circuit simulation model of a sulfur hexafluoride gas insulated switchgear pipeline and a bus by using a cable or a pipeline element based on an electromagnetic transient simulation method; establishing a path analysis model based on an electromagnetic transient analysis method, and assigning parameters obtained in field analysis to related elements of sulfur hexafluoride gas insulation switch equipment in the path analysis model; electromagnetic transient analysis of the sulfur hexafluoride gas insulation switch equipment in the operation process is carried out, and overvoltage and overcurrent under various operation modes are calculated. The invention realizes the accurate calculation of overvoltage and overcurrent in the operation process of the sulfur hexafluoride gas insulation switch equipment.
Description
Technical Field
The invention belongs to the technical field of electromagnetic transient calculation of power systems, and particularly relates to an electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear.
Background
Due to the shortage of land resources or the limitation of construction sites, sulfur hexafluoride gas insulation switch equipment is mostly adopted in the existing booster stations, transformer substations, converter stations and the like. Compared with an open design, the electromagnetic transient process in the pipeline structure of the sulfur hexafluoride gas insulated switchgear is very complex due to multiple reflections, and overvoltage or overcurrent exceeding the regulations easily occurs if the design is improper. In particular, the electromagnetic transient process generated in the operation process of the specially designed sulfur hexafluoride gas insulated switchgear station is more complicated, and the electrical parameters such as overvoltage, overcurrent and the like in the operation process are difficult to accurately obtain by adopting an analytic mode. Therefore, the probability of damage to primary equipment caused by overvoltage of the sulfur hexafluoride gas insulation switch equipment station is higher than that of the open station.
The electromagnetic transient analysis of the sulfur hexafluoride gas insulated switchgear by adopting electromagnetic transient analysis software is a mainstream choice for quantitatively analyzing overvoltage and overcurrent in the operation process of the sulfur hexafluoride gas insulated switchgear. However, existing electromagnetic transient analysis software does not provide finished and mature sulfur hexafluoride gas insulation switch equipment elements, and the existing electromagnetic transient analysis software needs to be built according to actual conditions. Particularly, in a model of rapid transient overvoltage, a sulfur hexafluoride gas insulated switchgear distribution parameter model needs to be established, not only sulfur hexafluoride gas insulated switchgear pipelines need to be simulated, but also circuit breakers, isolation switches and the like need to be simulated in distribution parameters, and engineering electromagnetic field simulation and electromagnetic transient circuit simulation need to be combined to realize accurate calculation of electromagnetic transient of sulfur hexafluoride gas insulated switchgear.
Disclosure of Invention
The invention aims to provide an electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear.
The invention provides an electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear, which comprises the following steps:
step 1, obtaining a structure diagram, size parameters and material parameters of sulfur hexafluoride gas insulation switch equipment to be analyzed;
step 2, establishing a field calculation model based on a finite element analysis method, and extracting the capacitance, inductance and resistance of a circuit breaker and a disconnecting link of the sulfur hexafluoride gas insulated switchgear;
step 3, establishing a path simulation model of the sulfur hexafluoride gas insulated switchgear pipeline and the bus by using a cable or a pipeline element based on an electromagnetic transient simulation method;
step 4, establishing a path analysis model based on an electromagnetic transient analysis method according to the results of the step 2 and the step 3, and assigning parameters obtained in the field analysis to related elements of sulfur hexafluoride gas insulated switchgear in the path analysis model;
and 5, carrying out electromagnetic transient analysis on the operation process of the sulfur hexafluoride gas insulation switch equipment, and calculating overvoltage and overcurrent under various operation modes.
By means of the scheme, through the electromagnetic transient analysis modeling method of the sulfur hexafluoride gas insulated switchgear, a field analysis model of a circuit breaker and an isolation disconnecting link in the sulfur hexafluoride gas insulated switchgear is established by using a finite element model, a circuit simulation model of a pipeline and a bus of the sulfur hexafluoride gas insulated switchgear is established by using electromagnetic transient analysis software, and calculation results of capacitance, inductance and resistance of complex parts of the sulfur hexafluoride gas insulated switchgear such as the circuit breaker and the isolation disconnecting link, obtained in the field analysis are used for establishing a distribution parameter model of the sulfur hexafluoride gas insulated switchgear, so that accurate calculation of overvoltage and overcurrent in the operation process of the sulfur hexafluoride gas insulated switchgear is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a flowchart of an electromagnetic transient analysis modeling method for sulfur hexafluoride gas insulated switchgear of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the embodiment provides a modeling method for electromagnetic transient analysis of sulfur hexafluoride gas insulated switchgear, including the following steps:
and step S1, obtaining a structure diagram, size parameters and material parameters of the sulfur hexafluoride gas insulation switch equipment to be analyzed.
And step S2, establishing a field calculation model based on a finite element analysis method, and extracting the capacitance, the inductance and the resistance of complex parts such as a sulfur hexafluoride gas insulated switchgear breaker and a disconnecting link. The capacitance and inductance calculations are shown in tables 1 and 2.
Table 1 capacitance distribution units: pF/m
| Phase A tube bus | B-phase tube bus | C-phase tube bus | Pipe wall | |
| Phase A tube bus | 50.261 | 12.688 | 12.688 | 24.885 |
| B-phase tube bus | 12.688 | 46.034 | 4.4656 | 28.881 |
| C-phase tube bus | 12.688 | 4.4656 | 46.034 | 28.88 |
| Pipe wall | 24.885 | 28.881 | 28.88 | 82.646 |
Table 2 inductance profile table units: mu H/m
| Phase A tube bus | B-phase tube bus | C-phase tube bus | |
| Phase A tube bus | 0.485 | 0.285 | 0.285 |
| B-phase tube bus | 0.285 | 0.491 | 0.252 |
| C-phase tube bus | 0.285 | 0.252 | 0.491 |
For elements which are not contained in electromagnetic transient circuit simulation software such as a circuit breaker, a disconnecting link and the like in sulfur hexafluoride gas insulated switchgear, by collecting the geometric dimension and the material parameters of the elements, the finite element field analysis software is used for extracting the parameters of capacitance, inductance and resistance. In the electromagnetic transient analysis model of the sulfur hexafluoride gas insulated switchgear, part of elements utilize mature elements in the circuit simulation software, but for the special structures of the sulfur hexafluoride gas insulated switchgear, such as circuit breakers, isolating switches and the like which affect the analysis precision and do not have mature elements, finite element field analysis software is adopted to extract distribution parameters, and user-defined elements which are not in the circuit analysis software are constructed.
And step S3, establishing a path simulation model of the sulfur hexafluoride gas insulated switchgear pipeline and the bus by using a cable or a pipeline element based on an electromagnetic transient simulation method.
For sulfur hexafluoride gas insulated switchgear pipelines and buses, cable elements in electromagnetic transient circuit analysis software are used for simulation, simulation time is saved, and the transient wave process can be accurately simulated.
Step S4, according to the results of the step S2 and the step S3, a path analysis model is established based on an electromagnetic transient analysis method, and parameters obtained in field analysis are assigned to related elements of sulfur hexafluoride gas insulation switch equipment in the path analysis model;
and step S5, carrying out electromagnetic transient analysis on the sulfur hexafluoride gas insulation switch equipment in the operation process, and calculating overvoltage and overcurrent under various operation modes.
The sulfur hexafluoride gas insulated switchgear electromagnetic transient analysis modeling method establishes a distribution parameter model of the sulfur hexafluoride gas insulated switchgear, can accurately simulate overvoltage and overcurrent of the sulfur hexafluoride gas insulated switchgear under various operating conditions, and the more transient the transition process of the sulfur hexafluoride gas insulated switchgear is, the more obvious the advantages of the distribution parameter model are; the method for building the distribution parameter elements of the special-shaped electrical primary equipment without mature elements in the electromagnetic transient circuit simulation software by combining the field analysis software and the circuit analysis software is provided, and the rapid transient process accurate simulation of special primary equipment such as sulfur hexafluoride gas insulated switchgear and the like is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The electromagnetic transient analysis modeling method for the sulfur hexafluoride gas insulated switchgear is characterized by comprising the following steps of:
step 1, obtaining a structure diagram, size parameters and material parameters of sulfur hexafluoride gas insulation switch equipment to be analyzed;
step 2, establishing a field calculation model based on a finite element analysis method, and extracting the capacitance, inductance and resistance of a circuit breaker and a disconnecting link of the sulfur hexafluoride gas insulated switchgear;
step 3, establishing a path simulation model of the sulfur hexafluoride gas insulated switchgear pipeline and the bus by using a cable or a pipeline element based on an electromagnetic transient simulation method;
step 4, establishing a path analysis model based on an electromagnetic transient analysis method according to the results of the step 2 and the step 3, and assigning parameters obtained in the field analysis to related elements of sulfur hexafluoride gas insulated switchgear in the path analysis model;
and 5, carrying out electromagnetic transient analysis on the operation process of the sulfur hexafluoride gas insulation switch equipment, and calculating overvoltage and overcurrent under various operation modes.
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Citations (7)
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|---|---|---|---|---|
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