Transition circuit for switching of non-multiplexing power electronic on-load tap-changer
A technology for power electronic switches and on-load taps, used in electrical switches, circuits, transformer/inductor components, etc.
Active Publication Date: 2021-03-05
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
[0009] The technical solution of the present invention provides a transition circuit for non-multiplexing power electronic on-load tap-changer switching to solve the problem of how to establish a non-multiplexing power electronic on-load tap-changing transition circuit
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[0065] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.
[0066] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...
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The invention discloses a non-multiplexing power electronic on-load tap-changer switching transition circuit. The circuit comprises main contacts MC1 and MC2, bypass power electronic switches GM1 andGM2, loop power electronic switches GR1 and GR2, protection vacuum switches V1 and V2, transition resistors R1 and R2 and an interelectrode nonlinear resistor MOA. The main contact MC1, the bypass power electronic switch GM1 and the transition resistor R1 are connected with odd taps of a voltage regulating winding of the transformer; the main contact MC2, the bypass power electronic switch GM2 andthe transition resistor R2 are connected with an even number of taps of a voltage regulating winding of the transformer; the transition resistor R1 is connected with the loop power electronic switchGR1 in series, and the transition resistor R2 is connected with the loop power electronic switch GR2 in series; the protection vacuum switch V1 is connected with the bypass power electronic switch GM1and the loop power electronic switch GR1, and the protection vacuum switch V2 is connected with the bypass power electronic switch GM2 and the loop power electronic switch GR2; and the main contactsMC1 and MC2 and the protection vacuum switches V1 and V2 are connected with the neutral point of the transformer so as to output load current.
Description
technical field [0001] The present invention relates to the technical field of switching circuits for on-load tap changers, and more particularly relates to a transition circuit for non-multiplexing power electronic on-load tap changer switching. Background technique [0002] The on-load tap changer is a power device that adjusts the voltage of the transformer by changing the turns ratio of the transformer under load. The basic principle of the on-load tap-changer is to change the number of turns of the winding, that is, the voltage ratio of the transformer, in a short period of time under continuous load conditions, and realize the function of voltage regulation. The challenge of the on-load tap changer is how to realize the fast switching and transfer of the load current between different tap circuits in the transformer winding. The higher the voltage between the transformer taps, the greater the load current, and the more prominent the problem. [0003] Most of the on-l...
Claims
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Login to View More IPC IPC(8): H01F29/04H01F27/40H01H9/00H01H9/54
CPCH01F29/04H01F27/402H01H9/0005H01H9/0038H01H9/542
Inventor 王绍武张书琦殷禹刘赫董勤晓李国富李志远余辉
Owner CHINA ELECTRIC POWER RES INST