Streamer propagation in hybrid gas-solid insulation

Singh, Sanjiv; Serdyuk, Yuriy V.; Summer, Raimund

doi:10.1109/ceidp.2015.7352030

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…Simulation results by Singh, Serdyuk and Summer [8] of the discharge dynamics for a similar configuration show qualitative similarities to the frames 2)-5) in Fig. 3a and an average streamer propagation velocity of 2 mm/ns.…”

Section: B Simulationssupporting

confidence: 54%

Streamer propagation in rod-plane air gaps with a dielectric barrier

Meyer

Mauseth

Pedersen³

et al. 2016

2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Abstract-High-voltage design optimization requires a fundamental understanding of electrical breakdown mechanisms under different stress situations. The impulse withstand voltage is normally used as dimensioning criterion for medium voltage air-insulated systems as flashover mechanisms in air are rapid. Prediction of withstand voltage relies on streamer inception and propagation models that are not always sufficiently accurate. Positive impulse voltage experiments were performed on a rodplane gap with a dielectric barrier at different positions parallel to the ground plane. Streamers initiate from the rod tip and propagate in the field direction. Charge deposited on the dielectric surface changes the field situation and can result in a higher inception voltage. The streamer propagation was recorded with a fast ICCD camera. Finite element method field simulations of the background field were used to evaluate the effect of a barrier surface potential on the streamer inception voltage. Streamers reach the ground electrode without initiating electrical breakdown. The discharge activity from the rod was reduced by deposited charge on the barrier.

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Section: B Simulationssupporting

confidence: 54%

Streamer propagation in rod-plane air gaps with a dielectric barrier

Meyer

Mauseth

Pedersen³

et al. 2016

2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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“…Propagation of streamers has been explored with fluid simulations, e.g. [11]- [14]. The large computational burden of such models have, however, limited their application so far, especially for 3D.…”

Section: Streamer Propagationmentioning

confidence: 99%

“…With dielectric barriers in the discharge path, streamers typically propagate along and around the barrier to ground [11], [22]. Barriers can also inhibit secondary streamer development [23], cause leaders to propagate a longer path in the gas phase [24] or stop them [25].…”

Section: Rod-plane Gaps With Dielectricmentioning

confidence: 99%

Breakdown mechanisms of rod-plane air gaps with a dielectric barrier subject to lightning impulse stress

Meyer

Mauseth

Pedersen

et al. 2018

IEEE Trans. Dielect. Electr. Insul.

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The complexity of gas-insulated substations makes it difficult to predict withstand voltages. Modeling interaction between dielectric surfaces and electrical discharges is a key challenge. In this study, 60 mm rod-plane air gaps with a dielectric barrier 20 mm below the rod are stressed with lightning impulses of both polarities. The discharge mechanisms are investigated with a high-speed camera, a photomultiplier tube and a current measurement system. The discharge development and current-velocity relationship is leader-like. With positive polarity applied, a leader propagates from the upper parts of the rod to ground. Negative impulses are characterized by positive leader development from the ground plane to the rod. For both polarities, the discharge starts with streamers propagating from the rod to the barrier. Positive streamers typically reach the opposite electrode without causing breakdown directly. The findings imply that empirical breakdown prediction models for short air gaps should involve conditions for positive leader initiation and development. The results also show that dielectric barriers increase the breakdown voltage by impeding leader development. The barriers increase the shortest discharge path and shift the point of leader inception further up on the rod.

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“…Ho‐Young Lee et al [13] simulated the surface discharge process of the liquid–solid insulation system with needle‐bar electrode structure by using the electro‐hydrodynamics method and calculated the discharge propagation velocity. Based on the hydrodynamic theory, Shailendra Singh et al [14] considered the charge transport process inside a dielectric barrier and analysed the influence of solid dielectric barrier on development of air discharge between needle and plate electrodes. Some scholars combined hydrodynamic theory with plasma reaction in discharge.…”

Section: Introductionmentioning

confidence: 99%

Finite‐element analysis for surface discharge on polyimide insulation in air at atmospheric pressure under pulsed electrical stress

Dong

Liu

et al. 2020

High Voltage

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A surface discharge non-equilibrium plasma model of air-polyimide under pulsed electrical stress is established, by considering the reaction of charged particles on the dielectric surface and the secondary electron emission caused by the condition that high-energy particles bombard the material surface. The model defines the chemical reaction of air discharge by using simplified set of reactions, which greatly reduces the complexity of the model. To avoid the negative value of particle density in the process of solution, the logarithmic finite-element method is used to solve the model established, so as to implement the dynamic simulation of the surface discharge process. Also, the temporal and spatial evolution of the microparameters such as charge and electric field distribution during discharge are obtained, and the reliability of the model is verified by experiments in terms of discharge development pattern and surface charge accumulation. By comparing the development process of surface discharge under single pulse and repetitive pulses, it can be seen that surface discharge develops from needle electrode to ground electrode under both repetitive pulses and single pulse stress, but the relationship between the discharge propagation time under repetitive pulses and pulse repetition rate is a 'u' curve, and the inflection point moves to higher repetition rate region with the increase of voltage.

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Streamer propagation in hybrid gas-solid insulation

Cited by 11 publications

References 7 publications

Streamer propagation in rod-plane air gaps with a dielectric barrier

Streamer propagation in rod-plane air gaps with a dielectric barrier

Breakdown mechanisms of rod-plane air gaps with a dielectric barrier subject to lightning impulse stress

Finite‐element analysis for surface discharge on polyimide insulation in air at atmospheric pressure under pulsed electrical stress

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