Symmetrical vacuum bubble load balancing transition circuit device and control method
A load balancing and circuit device technology, applied in circuits, transformer/inductor circuits, electrical switches, etc., can solve the problems of complex mechanical structure and different degrees of ablation, improve electrical life, avoid rail change operation, reduce The effect of mechanical complexity
Active Publication Date: 2021-04-16
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
[0004]The number of mechanical transfer switches in the conventional on-load tap-changer switching core is relatively large. For one pole, it generally includes 2 main circuit switches and 2 auxiliary switches. Transfer switch, the mechanical structure is more complex
The vacuum circuit breaker without transition resistance in the on-load tap-changer is a load vacuum circuit breaker, which only undertakes the task of breaking the load current; the vacuum circuit breaker connected with a transition resistance is a circulating vacuum circuit breaker, which only undertakes the task of breaking the internal For the task of circulating current, according to the experience of UHV DC engineering, the load current of the converter transformer is generally 500-600A for the single-column winding, and the internal circulating current flowing through the transition resistor is about 900-1000A. load current, so after multiple switching, the degree of ablation of the load vacuum circuit breaker and the circulating vacuum circuit breaker is different, and the switching burden and electrical damage of the circulating vacuum circuit breaker will be more serious
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[0078]The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention can be implemented in many different forms, and is not limited thereto herein, and these embodiments are provided for detailed and fully disclosed The invention is sufficiently conveyed to those skilled in the art. The terminology representing the exemplary embodiment in the drawings is not limited to the present invention. In the drawings, the same unit / element is used in the same reference numeral.
[0079]Unless otherwise stated, the terms (including scientific terms) used herein have general understanding of technicians in the art. In addition, it will be understood that the terms defined by the commonly used dictionary should be understood as a consistent meaning in context of its related fields, and should not be understood as ideal or too formal meaning.
[0080]The present invention proposes a transition circuit device for a s...
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The invention provides a symmetrical vacuum bubble load balancing transition circuit device and a control method, and belongs to the technical field of tapping switches. The device comprises a change-over switch Z1, a change-over switch Z2, a circulating current vacuum circuit breaker RV1, a circulating current vacuum circuit breaker RV2, a load current vacuum circuit breaker MV, a main switch MC1, a main switch MC2 and a transition resistor R, in the transition process, the time sequence of switching from the odd-numbered gear to the even-numbered gear and switching from the even-numbered gear to the odd-numbered gear is in mirror symmetry, and for the change-over switch with reciprocating action, the track transfer operation of a mechanical transmission mechanism in the reciprocating switching process is avoided, the mechanical complexity is reduced, and the reliability of the switch is improved.
Description
Technical field[0001]The present invention relates to the field of disciplinary switching, and more particularly to a transition circuit device and a control method of a synchronous vacuum bulk load balance.Background technique[0002]A load-bearing switch is a switching device for the transformer to provide a constant voltage at the time of load, and the basic principle is to achieve switching between the separators in the transformer winding without interrupting the load current, thereby changing the winding The number of turns, that is, the voltage ratio of the transformer, the purpose of the pressure regulation, the vacuum has a load-bearing switch, mainly relying on the vacuum tube of the switching switch to realize the arc extinguishing, the arc and the hot gas are not exposed; the oil in the open petrol Will not carbonize and pollute, oil does not need to purify, the burning corrosion of the contacts in the vacuum tube can be lowered, and the on-load tap switch is mainly compos...
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IPC IPC(8): H01F29/04H01F27/42H01H9/00H01H9/54
CPCH01F29/04H01H9/0038
Inventor 张书琦李鹏李金忠汪可杨帆李戈琦张浩李刚刘雪丽孙建涛程涣超徐征宇王健一遇心如梁宁川吴标王琳
Owner CHINA ELECTRIC POWER RES INST