Dividing and setting strategy of improving calculation efficiency for needle electrode corona discharge with a large‐scale space

Li, Dingchen; Li, Chuan; Li, Jiawei; Wang, Pengyu; Liu, Zhi; Yang, Wendi; Zhang, Ming; Yang, Yong; Yu, Kun

doi:10.1049/hve2.12167

Cited by 8 publications

(7 citation statements)

References 37 publications

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“…Therefore, according to the different regions formed by the particle reaction of corona discharge, this paper proposes a method for region segmentation using multiple models (hybrid models), thereby extending the computational scope of discharge modes. The hybrid model uses a hydrodynamic model to calculate various particle reactions in the ionization region, and the ion mobility model calculates the particle distribution in the drift region [17,18,31]. However, all of the above are studies of a single discharge point.…”

Section: Methods Descriptionmentioning

confidence: 99%

“…In general, there are two ways to obtain the distribution characteristics of charged particles and electric fields: experimental measurements and numerical simulations. Experimental measurements can directly obtain charged particle concentration [17,18]. However, due to the complex electromagnetic environment, the distribution of charged particles around the electrodes cannot be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the huge computational load caused by multiple discharge points and their interactions, the single model proposed in this paper cannot perform a numerical simulation of multi-point corona discharge in a large space. Based on the hydrodynamic model and the ion mobility model, a sub-regional hybrid model is established in [17,18]. This method enables the simulation of corona discharge for a single-tip electrode with large spacing (25 cm).…”

Section: Introductionmentioning

confidence: 99%

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Multi-point discharge model: study on corona discharge of double-ended needle in large space

et al. 2023

Plasma Sci. Technol.

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Corona discharge, as a common means to obtain non-equilibrium plasma, can generally obtain high concentration plasma by increasing discharge points to meet production needs. However, the existing numerical simulation models used to study multi-point corona discharge are all calculations of small-scale space models, which cannot obtain the distribution characteristics of plasma in large space. Based on our previous research, this paper proposes a hybrid model for studying the distribution of multi-point discharge plasma in large-scale spaces, which divides the computational domain and computes separately with the hydrodynamic model and the ion mobility model. The simulation results are verified by the needle-ball electrode device. Firstly, the electric field distribution and plasma distribution of the needle electrodes with single tip and double tips are compared and discussed. Secondly, the plasma distribution of the needle electrode with the double tip at different voltages was investigated. Both computational and experimental results indicate that the charged particle concentration and current of the needle electrode with double tips are both twice as high as those of the needle electrode with a single tip. This model can extend the computational area of the multi-point corona discharge finite element model to the sub-meter (25 cm) or meter level, which provides an effective means to study the plasma distribution generated by multiple discharge points in the large-scale space.

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Section: Methods Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-point discharge model: study on corona discharge of double-ended needle in large space

et al. 2023

Plasma Sci. Technol.

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“…[11], the effect of three different shield configurations on the electric field distribution near the disconnecting switch break was studied and it was found that the best electric field distribution was obtained with a shield of elliptical configuration. Refs [12–14] proposed a new type of split‐box double‐break disconnector and carried out insulation strength checks. It was found that: compared to conventional disconnectors, the new split‐box double‐break disconnector has better insulation performance and higher operational reliability.…”

Section: Introductionmentioning

confidence: 99%

Structural Optimization Design of Three Phase Enclosed GIS Disconnector Based on MOGOA and ELM

Ding,

Wang,

et al. 2023

IEEJ Transactions Elec Engng

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Due to the compact and complex internal structure of 110 kV three‐phase enclosed GIS disconnector, the voltage distribution between the contact breaks of each phase has an influence on the insulation performance of the GIS disconnector, and its internal insulation design is a difficult point to be solved. To solve this problem, this paper firstly establishes a three‐dimensional model of three‐phase enclosed GIS disconnecting switch and conducts a research on the distribution of electric field under a specific working condition, it is found that the outer corner of the static contact, the inner corner of the static arc contact, the inner corner of the outer end of the moving contact and the inner corner of the moving contact are the internal electric field concentration of the three‐phase enclosed GIS disconnector. Then, in order to further reduce the electric field strength and improve the insulation margin and performance, this paper proposes a method based on the combination of Extreme Learning Machine (ELM) and Multi‐objective Grasshopper Optimization Algorithm (MOGOA) to optimize the structural design of three‐phase enclosed GIS disconnector, and a ELM model is established, which takes the internal fillet radius of stationary arcing contact, the internal fillet radius of moving contact, the internal fillet radius of external end of dynamic and static contact, the radius of the outer corner of the two static side contacts and the opening distance of the grounding contact as the inputs, and takes the maximum electric field strength of the two static side contacts and the moving side contacts as outputs; Finally, the structural parameters are optimized by MOGOA algorithm. Compared to the pre‐optimization period, the electric field strengths of the bus bar static‐side contact, dynamic contact and static side contact of the B‐phase after optimization decreased from 20.2, 9.28 and 17.5 to 11.4, 6.65 and 11.5 kV/mm, respectively. The electric field strengths of the dynamic and static side contacts are significantly reduced, which is beneficial for improving the insulation performance of the three‐phase enclosed GIS disconnector. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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“…Existing models to simulate corona discharge mainly include the plasma chemistry model [16], the hydrodynamic model [17], and the ion-migration model [18]. According to the characteristics of the above three models, a hybrid model for calculating large space corona discharge based on the hydrodynamic model and ion-migration model was proposed in our previous work [19,20]. The hybrid model divides the large computational domain into the ionization region and migration region according to the complexity of particle reaction, and calculates the physical quantities of the ionization zone and migration zone by the above two models, respectively.…”

Section: Introductionmentioning

confidence: 99%

Study on the interaction mechanism of double-blade corona discharge with a large discharge gap

Li¹,

Li²,

Li³

et al. 2023

Plasma Sci. Technol.

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Multi source corona discharge is a usual way to generate more charged particles, but the interaction mechanism between multiple discharge sources which largely determines the overall discharge effect, is still less studied. In this work, a large-space hybrid model based on hydrodynamic model and ion transport model is adopted to study the interaction mechanism between the discharge sources. Specifically, the effects of the number of electrodes, voltage level, and electrode spacing on the discharge characteristics are studied by taking a double-blade electrode as an example. The calculation results show that when multiple discharge electrodes operate simultaneously, the superimposed electric field includes multiple components from the electrodes, and make the ion distribution and current different from that under single-blade electrode. The larger the distance between discharge electrodes, the weaker the interaction. When the electrode spacing d is larger than 4 cm, the interaction can be ignored. The research results can guide the design of large discharge gap array electrodes to achieve efficiently discharge.

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Dividing and setting strategy of improving calculation efficiency for needle electrode corona discharge with a large‐scale space

Cited by 8 publications

References 37 publications

Multi-point discharge model: study on corona discharge of double-ended needle in large space

Multi-point discharge model: study on corona discharge of double-ended needle in large space

Structural Optimization Design of Three Phase Enclosed GIS Disconnector Based on MOGOA and ELM

Study on the interaction mechanism of double-blade corona discharge with a large discharge gap

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