Study of vacuum arc plasma transport characteristics during the DC interrupting process

2022 ◽  
Author(s):  
Xiaolong Huang ◽  
Tao Sun ◽  
Yuezheng Wu ◽  
Shangyu Yang ◽  
Lihua Zhao ◽  
...  
Keyword(s):  
Circuit Breaker ◽  
Plasma Transport ◽  
Vacuum Arc ◽  
Ion Temperature ◽  
Ion Density ◽  
Transient Characteristics ◽  
Vacuum Circuit Breaker ◽  
Key Factor ◽  
The Moment ◽  
Current Drop

Abstract The mechanical DC vacuum circuit breaker based on forced-over-zero technology will inevitably generate vacuum arc during the actual interrupting process. Since the current drop frequency is usually very high, the vacuum arc usually exhibits obvious transient characteristics, and the excessive transient characteristics may even become a key factor limiting the interruption capacity. In order to improve the mechanical DC vacuum circuit breaker arc interrupting capability, this paper establishes a vacuum arc transient magneto-hydrodynamic simulation model in the DC interrupting process and studies the plasma transport characteristics of the vacuum arc under different DC interrupting conditions. The results show that the ion pressure, ion density and ion temperature decrease with decreasing arc current, while the ion velocity gradually increases during the DC interrupting process. The increase in breaking current and current drop frequency will increase the ion density in the arc column at the moment of current crossing zero, resulting in more difficult vacuum arc interrupting. The results of the study can provide an important theoretical basis for a deeper understanding of the vacuum arc transient process in the DC interrupting process and improve the DC vacuum circuit breaker arc interruption capability.

Extraction of the Geometric Features from the Vacuum Switching Arc Images

2013 ◽  
Vol 333-335 ◽  
pp. 860-863
Author(s):  
Hua Jun Dong ◽  
Wen Liang Dong ◽  
Kai Kang ◽  
Dao Shun Wang
Keyword(s):  
Power System ◽  
High Speed ◽  
Circuit Breaker ◽  
Morphological Characteristics ◽  
Vacuum Arc ◽  
Cmos Camera ◽  
Camera System ◽  
Vacuum Switch ◽  
Vacuum Circuit Breaker ◽  
Critical Components

Vacuum circuit breaker is one of the major critical components that controls and protects the power system. The breaking capability of the vacuum switch directly affects the safety of the power system. However, the breaking capability of the vacuum switch is determined by the morphological characteristics of the vacuum arc images. In this paper, in order to research the variation of the vacuum arc, a high-speed CMOS camera system is used to collect the vacuum arc images within a short gap (7mm), the morphological characteristics of the vacuum arc images are extracted based on the digital image processing. At last, the variation of the arc is analyzed.

Basic investigation of a high-speed vacuum circuit breaker and its vacuum arc characteristics

2006 ◽  
Vol 153 (1) ◽  
pp. 11 ◽  
Author(s):  
Y. Niwa ◽  
T. Funahashi ◽  
K. Yokokura ◽  
J. Matsuzaki ◽  
M. Homma ◽  
...  
Keyword(s):  
High Speed ◽  
Circuit Breaker ◽  
Vacuum Arc ◽  
Vacuum Circuit Breaker ◽  
Arc Characteristics ◽  
Basic Investigation

Development of the Vacuum Arc Chute for a 110 kV Single-Break Vacuum Circuit Breaker

2021 ◽  
Vol 4 (4) ◽  
pp. 58-64
Author(s):  
Valery A. LAVRINOVICH ◽  
◽  
Alexey A. PERTSEV ◽  
Lidiya A. Ryl’skaya ◽  
◽  
...  
Keyword(s):  
Circuit Breaker ◽  
Electric Strength ◽  
Vacuum Arc ◽  
Circuit Breakers ◽  
Metallic Contact ◽  
Vacuum Circuit Breaker ◽  
Capacitive Load ◽  
In Series ◽  
Shielding System ◽  
Single Break

Requirements for high-voltage vacuum circuit breakers for networks with a grounded neutral, which are stemming from the prospects of using vacuum circuit breakers in networks with the solidly grounded neutral are formulated. The arch chute design for a 110 kV single-break vacuum circuit breaker that takes into account the occurrence of repeated breakdowns is developed. The shielding system equalizes the voltage over the chute casing, decreases the electric field intensity at the “triple point”, protects the casing dielectric from becoming dusted with metallic contact parts erosion products, prevents the occurrence of cascade breakdown between the contact parts and central shield, and eliminates a possible decrease of the chute electric strength as it gradually works out its switching life. It is shown that the chute design includes measures to prevent the possibility of repeated breakdowns during disconnection up to class С1 according to GOST 52565-2006. It has been proven that for vacuum arc chutes for class С2 (for switching a capacitive load) it is necessary to develop a chute with two breaks between the contact parts or to connect two vacuum chutes in series. The shielding system adopted in the chute rules out the possibility of ceramic casing to become metallized, which decreases the chute electric strength as it gradually works out its switching life, and the vacuum arc transfer to beyond the inter-contact gap boundaries onto the central shield, the burnout of which results in that the vacuum arc chute loses its tightness and fully loses its functional properties.

Investigation of the Arc of a Vacuum Circuit Breaker in a fixed Gap using the Triggering method.

2012 ◽  
Vol 13 (5) ◽  
Author(s):  
Stephen Ogidi Oodo ◽  
Huajun Dong ◽  
Jiyan Zou
Keyword(s):  
High Speed ◽  
Direct Relationship ◽  
Low Voltage ◽  
Circuit Breaker ◽  
Digital Camera ◽  
Life Time ◽  
Vacuum Arc ◽  
Ionized Gas ◽  
Metal Vapour ◽  
Vacuum Circuit Breaker

Abstract When the contacts of a Vacuum circuit breaker (VCB) with current flowing through it, is separated, an arc is generated. The Arc is usually supported by ionized gas or ionized metal vapour derived form the metal contact. This arc is an essential component of the interrupting process and capability of the Vacuum circuit breaker. The object of this paper is to trigger, record, observe and analyze the dynamic image of the Vacuum arc when it ignites in a short gap and at a low voltage. A CMOS high speed digital camera will be used to record the images of the arc. The characteristics of the arc in its diffused and constricted state, the degree of changes between the two states, and the direct relationship between the voltage and current will also be observed. The life time of the Vacuum arc will be 10ms

Study of anode spot transient processes of a high-current vacuum arc with high-speed spectroscopy and videorecording

2021 ◽  
Vol 64 (1) ◽  
pp. 112-117
Author(s):  
A.V. Schneider ◽  
◽  
S.A. Popov ◽  
E.L. Dubrovskaya ◽  
A.Y. Yushkov ◽  
...  
Keyword(s):  
High Speed ◽  
Arc Discharge ◽  
Circuit Breaker ◽  
Vacuum Arc ◽  
Charge Composition ◽  
High Current ◽  
Anode Region ◽  
Anode Spot ◽  
Vacuum Circuit Breaker ◽  
Switching Characteristics

The processes of plasma formation in the anode region of a high-current vacuum arc discharge are of high actuality in terms of improving the switching characteristics of vacuum circuit breaker. In present paper the dynamics of the radiation spectrum of anode region was recorded with the system that allows time scanning of a spectrum. In parallel, there was high-speed videorecording. The obtained data clearly show changes in the charge composition of the anode spot plasma in the process of changing discharge forms.

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