CN103617372A - Method for computing three-dimensional electric fields of converter valve - Google Patents
Method for computing three-dimensional electric fields of converter valve Download PDFInfo
- Publication number
- CN103617372A CN103617372A CN201310665225.4A CN201310665225A CN103617372A CN 103617372 A CN103617372 A CN 103617372A CN 201310665225 A CN201310665225 A CN 201310665225A CN 103617372 A CN103617372 A CN 103617372A
- Authority
- CN
- China
- Prior art keywords
- electric field
- converter valve
- field
- point
- potential
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a method for computing three-dimensional electric fields of a converter valve. The method is characterized by comprising the steps that an external space electric field and an internal electric field of the converter valve are computed through a boundary element method; an electric field model is built through a three-dimensional finite element-boundary element and solved, the adaptability of the finite element and the adaptability of the boundary element in the process of computing the electric fields of the converter valve are studied, the electric field distribution condition of the direct-current converter valve can be fully reflected, and the method is fast and accurate in computing and strong in adaptability and has high engineering value.
Description
Technical field
The present invention is a kind of converter valve Calculation of Three-Dimensional Electric Fields method, is applied to the method research of extra-high voltage direct-current converter valve Electric Field Simulation and field analysis.
Background technology
Converter valve realizes the energy transmission of AC system and straight-flow system, is the core power electronic equipment of HVDC (High Voltage Direct Current) transmission system.The development work of high voltage direct current converter valve is a very complicated engineering, relate to more than ten subject systems such as High-Voltage Technology, Power Electronic Technique, thermodynamics, structural mechanics, the difficulty that possesses skills is high, integrated level is large, interdisciplinary fields are many, reliability requirement high-technology feature.From insulation angle, should strictly control converter valve radome field intensity everywhere, guarantee electric clearance between interlayer and layer inner screening plate from and margin of safety, guarantee that radome surface corona free produces.Therefore planning and design and engineering construction that, the distribution of converter valve radome surface electric field intensity is calculated for converter valve system have important directive significance.
Summary of the invention
The object of this invention is to provide a kind of calculating fast, accurately, strong adaptability, has the converter valve Calculation of Three-Dimensional Electric Fields method of higher actual application value.
The object of the invention is to be realized by following technical scheme: a kind of converter valve Calculation of Three-Dimensional Electric Fields method, it is characterized in that, it comprises following content:
1) adopt boundary element method to calculate converter valve space outerpace electric field
Put r then and there on the surface of conductor time, boundary integral equation can be expressed as
In formula, r is field point position vector, and r ' is source point position vector,
for field point current potential, σ is source point surface charge density, and R is the distance between a point and source point, for solving variable, border is discrete with σ, and adopts the golden weighted residual method of gal the Liao Dynasty, and formula (1) is write as:
In formula: e represents the numbering of a unit, e ' represents the numbering of source unit, and i, j represent discrete nodes numbering, S
ethe integral domain that represents a unit, S
e 'the integral domain that represents source unit,
represent node potential, σ
irepresent node surface charge density, N
i, N
jfor interpolating function, ε
0for the specific inductive capacity of vacuum, by interpolation discrete type (2), can be converted into algebraic equation, then try to achieve Electric Field Distribution;
2) adopt finite element method to calculate converter valve internal electric field
Radome current potential everywhere can calculate by equivalent electrical circuit, radome surface field must be analyzed from the angle of field, the structure of test unit and size determine that the surface electric field intensity of radome calculates, the surface electric field intensity of radome calculates and relates to Three-dimensional static electric field, solve the first kind boundary values of Three-dimensional static electric field, current potential meets following Laplace equation
Wherein, the specific inductive capacity that ε is air,
for the current potential of space point, Γ is field domain border,
for borderline potential value, adopt the above-mentioned partial differential equation of finite element method, obtain the Potential distribution in converter valve space, then obtain valve module internal electric intensity.
A kind of converter valve Calculation of Three-Dimensional Electric Fields method of the present invention, compare with existing computing method, the present invention utilizes three-dimensional finite element-boundary element set up electric field model and solve, the applicability when calculating converter valve space outerpace electric field and internal electric field by research finite element and boundary element, the Electric Field Distribution situation that can fully reflect extra-high voltage direct-current converter valve, it is quick, accurate that the method is calculated, and strong adaptability, has higher actual application value.
Accompanying drawing explanation
Fig. 1 is a kind of converter valve model of the present invention schematic diagram;
Fig. 2 is reactor schematic diagram;
Fig. 3 is TTM electric hookup.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of converter valve Calculation of Three-Dimensional Electric Fields method of the present invention is further described:
With reference to Fig. 1, a kind of converter valve Calculation of Three-Dimensional Electric Fields method of the present invention, sets up the three-dimensional finite element electric field model of converter valve,
1) adopt boundary element method to calculate converter valve space outerpace electric field
Put r then and there on the surface of conductor time, boundary integral equation can be expressed as
In formula: r is field point position vector, and r ' is source point position vector,
for field point current potential, σ is source point surface charge density, and R is the distance between a point and source point, for solving variable, border is discrete with σ, and adopts the golden weighted residual method of gal the Liao Dynasty, and formula (1) is write as:
In formula, e represents the numbering of a unit, and e ' represents the numbering of source unit, and i, j represent discrete nodes numbering, S
ethe integral domain that represents a unit, S
e 'the integral domain that represents source unit,
represent node potential, σ
irepresent node surface charge density, N
i, N
jfor interpolating function, ε
0for the specific inductive capacity of vacuum, by interpolation discrete type (2), can be converted into algebraic equation, then try to achieve Electric Field Distribution;
2) adopt finite element method to calculate converter valve internal electric field
Radome current potential everywhere can calculate by equivalent electrical circuit, radome surface field must be analyzed from the angle of field, the structure of test unit and size have determined that it is complicated Three-dimensional static electric field problem that radome surface electric field intensity calculates, and this problem is Dirichlet problem, current potential meets following Laplace equation
Wherein, the specific inductive capacity that ε is air,
for the current potential of space point, Γ is field domain border,
for borderline potential value, adopt the above-mentioned partial differential equation of finite element method, obtain the Potential distribution in converter valve space, then obtain valve module internal electric intensity.
Fig. 2 is direct current transportation saturable reactor, in order to limit thyristor, open the current-rising-rate in stage, generally there are coil and iron core to form, when analyzing converter valve internal electric field, can ignore the inner complicated structure of reactor, with the model of simplifying, simulate, as shown in Figure 2, shell is insulating material, and inside is metal electrode, while calculating electric field, on metal electrode, apply corresponding current potential.
Fig. 3 is the circuit topology of thyristor trigger control circuit TTM plate, due to the complex structure of TTM plate own, when analyzing converter valve internal electric field, can be equivalent to dielectric-slab, ignores the impact of electronic component on highfield.
Claims (1)
1. a converter valve Calculation of Three-Dimensional Electric Fields method, is characterized in that, it comprises following content:
1) adopt boundary element method to calculate converter valve space outerpace electric field
Put r then and there on the surface of conductor time, boundary integral equation can be expressed as
In formula, r is field point position vector, and r ' is source point position vector,
for field point current potential, σ is source point surface charge density, and R is the distance between a point and source point, for solving variable, border is discrete with σ, and adopts the golden weighted residual method of gal the Liao Dynasty, and formula (1) is write as:
In formula, e represents the numbering of a unit, and e ' represents the numbering of source unit, and i, j represent discrete nodes numbering, S
ethe integral domain that represents a unit, S
e 'the integral domain that represents source unit,
represent node potential, σ
irepresent node surface charge density, N
i, N
jfor interpolating function, ε
0for the specific inductive capacity of vacuum, by interpolation discrete type (2), can be converted into algebraic equation, then try to achieve Electric Field Distribution;
2) adopt finite element method to calculate converter valve internal electric field
Radome current potential everywhere can calculate by equivalent electrical circuit, covering cover surface field must analyze from the angle of field, the structure of test unit and size determine that the surface electric field intensity of radome calculates, the surface electric field intensity of radome calculates and relates to Three-dimensional static electric field, solve the first kind boundary values of Three-dimensional static electric field, current potential meets following Laplace equation
Wherein, the specific inductive capacity that ε is air,
for the current potential of space point, Γ is field domain border,
for borderline potential value, adopt the above-mentioned partial differential equation of finite element method, obtain the Potential distribution in converter valve space, then obtain valve module internal electric intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310665225.4A CN103617372A (en) | 2013-12-10 | 2013-12-10 | Method for computing three-dimensional electric fields of converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310665225.4A CN103617372A (en) | 2013-12-10 | 2013-12-10 | Method for computing three-dimensional electric fields of converter valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103617372A true CN103617372A (en) | 2014-03-05 |
Family
ID=50168075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310665225.4A Pending CN103617372A (en) | 2013-12-10 | 2013-12-10 | Method for computing three-dimensional electric fields of converter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103617372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360197A (en) * | 2014-11-14 | 2015-02-18 | 武汉大学 | Method for monitoring resistance of valve discs of arresters based on resistance-capacitance network |
| CN104715125A (en) * | 2015-04-09 | 2015-06-17 | 国家电网公司 | Method for optimizing electric field distribution of cable accessory by indirect boundary element method |
| CN108021748A (en) * | 2017-12-01 | 2018-05-11 | 国网冀北电力有限公司电力科学研究院 | Electric Field Simulation method and system for high-voltage large-capacity flexible direct current converter valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201281990Y (en) * | 2008-09-27 | 2009-07-29 | 中国西电电气股份有限公司 | Direct current arrester for protection of inversion valve |
| CN101795052A (en) * | 2009-12-25 | 2010-08-04 | 中国电力科学研究院 | Novel valve module of converter valve for high-voltage direct-current power transmission based on thyristor |
-
2013
- 2013-12-10 CN CN201310665225.4A patent/CN103617372A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201281990Y (en) * | 2008-09-27 | 2009-07-29 | 中国西电电气股份有限公司 | Direct current arrester for protection of inversion valve |
| CN101795052A (en) * | 2009-12-25 | 2010-08-04 | 中国电力科学研究院 | Novel valve module of converter valve for high-voltage direct-current power transmission based on thyristor |
Non-Patent Citations (3)
| Title |
|---|
| 刘刚，等.: "换流变压器极性反转非线性电场分析", 《高电压技术》 * |
| 刘士利，等.: "应用混合权函数边界元法的特高压换流阀屏蔽罩表面电场计算", 《中国电机工程学报》 * |
| 张杰.: "换流变压器内部电场分析及油纸绝缘试验系统设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360197A (en) * | 2014-11-14 | 2015-02-18 | 武汉大学 | Method for monitoring resistance of valve discs of arresters based on resistance-capacitance network |
| CN104360197B (en) * | 2014-11-14 | 2017-04-12 | 武汉大学 | Method for monitoring resistance of valve discs of arresters based on resistance-capacitance network |
| CN104715125A (en) * | 2015-04-09 | 2015-06-17 | 国家电网公司 | Method for optimizing electric field distribution of cable accessory by indirect boundary element method |
| CN108021748A (en) * | 2017-12-01 | 2018-05-11 | 国网冀北电力有限公司电力科学研究院 | Electric Field Simulation method and system for high-voltage large-capacity flexible direct current converter valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tatematsu et al. | Three-dimensional FDTD calculation of lightning-induced voltages on a multiphase distribution line with the lightning arresters and an overhead shielding wire | |
| CN106407576A (en) | An extracting method and system for electromagnetic radiation characteristic parameters of apparatuses | |
| Zhen et al. | 3-D finite-element method for calculating the ionized electric field and the ion current of the human body model under the UHVDC lines | |
| CN103617372A (en) | Method for computing three-dimensional electric fields of converter valve | |
| CN105552890A (en) | Security region volume based evaluation method for distribution system N-1 safe operation range | |
| Gourgouliatos et al. | Magnetar activity via the density–shear instability in Hall-MHD | |
| Hetita et al. | Experimental and numerical analysis of transient overvoltages of PV systems when struck by lightning | |
| Wang et al. | 3-D electric field computation of steeple rooftop houses near HVDC transmission lines | |
| Qi et al. | Parameter Extraction and Wideband Modeling of $\pm $1100 kV Converter Valve | |
| Qiao et al. | An iterative flux tracing method without Deutsch assumption for ion-flow field of AC/DC hybrid transmission lines | |
| Zhang et al. | Computation of ion-flow field near the metal board house under the HVDC bipolar transmission line | |
| CN105205202B (en) | A kind of carrying current calculation method | |
| CN103678808A (en) | Transformer substation electromagnetic field simulation method based on component library | |
| Tatematsu | Overview of the three-dimensional FDTD-based surge simulation code VSTL REV | |
| Tatematsu et al. | Lightning surge analysis of a microwave relay station using the FDTD method | |
| Wang et al. | Calculation of ion-flow field near the crossing of HVdc transmission lines using equivalent corona conductors | |
| Hajiaboli et al. | Analysis of grounding systems in the vicinity of hemispheroidal heterogeneities | |
| Xiaohui et al. | Calculation of electromagnetic induction inside a wind turbine tower struck by lightning | |
| Tian et al. | Study on the hybrid ion‐flow field of HVDC and HVAC transmission lines by the nodal discontinuous Galerkin time‐domain method | |
| Kobayashi et al. | Computation of lightning electromagnetic pulses using a hybrid constrained interpolation profile and transmission line modeling method | |
| CN103258119A (en) | Assessment method for power frequency electric field of high voltage transformer substation | |
| CN114298433A (en) | Site selection method, device, equipment and medium for 5G base station in transformer substation | |
| Jana et al. | Mathematical modeling of impulse island controller to safely store the energy from high‐voltage lightning impulse | |
| Du et al. | Hosting capacity assessment in distribution networks considering wind–photovoltaic–load temporal characteristics | |
| Pantoja et al. | Analysis of a lightning earthing system using electromagnetic simulations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140305 |