A phase commutation device and method for seamless switching
A technology of seamless switching and composite switching, which is applied in the direction of reducing the asymmetry of the multi-phase network and eliminating/reducing the asymmetry of the multi-phase network. It can solve the problems that the impact of continuous power supply equipment cannot be ignored, and achieve seamless connection The effect of continuous voltage and no impact of current
Active Publication Date: 2020-10-30
武汉武新电气科技股份有限公司
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Problems solved by technology
However, the impact of the current high failure rate and voltage fluctuations during the switching process on continuous power supply equipment cannot be ignored
Method used
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[0040] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0041] Such as figure 1 As shown, a seamless switching phase commutation device includes a current phase composite switch, a phase composite switch to be switched, a correction memory unit and a timing analysis unit;
[0042] The composite switch of the current phase and the composite switch of the phase to be switched are both composed of a one-way thyristor and a magnetic latching relay connected in parallel, one end of the composite switch of the current phase is electrically connected to the current phase, and one end of the composite switch of the phase to be switched is electrically connected to the current phase. Electrically connected to the phase to be switched, and the other end of the composite switch of ...
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The invention relates to a seamless switching phase commutation device and method. The device comprises a current phase composite switch, a to-be-switched phase composite switch, a correction memory unit and a timing analysis unit. Both the current phase composite switch and the to-be-switched phase composite switch are composed of a unidirectional thyristor and a magnetic latching relay connectedin parallel. The correction memory unit is used for correcting the action time data of the magnetic latching relay to obtain a lead coefficient. The timing control unit is used for analyzing out a switching timing signal according to the voltage of the current phase, the voltage of the to-be-switched phase and the lead coefficient and triggering the current phase composite switch and the to-be-switched phase composite switch to act. Based on the fast zero-crossing characteristic of the unidirectional thyristors and the high power reliability of the magnetic latching relays, timing control isgiven through the correction memory unit and the analysis by the timing analysis unit to drive the current phase composite switch and the to-be-switched phase composite switch to be switched on and off, so as to meet the requirements of seamless connection of the transition process, continuous voltage and no current impact.
Description
technical field [0001] The invention relates to the technical field of low-voltage distribution networks, in particular to a phase-commutation device and method for seamless switching. Background technique [0002] The problem of unbalanced three-phase load in distribution network has been widely concerned, and the technical solutions adopted can be divided into active and passive. Among them, in the passive scheme, the commutation switch plays an important role as a key execution unit. At present, in the mainstream scheme, the relay as the main switch has been recognized by the market and widely used. However, the impact of the current high failure rate and the voltage fluctuation during the switching process on the continuous power supply equipment cannot be ignored. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a seamless switching phase commutation device and method to realize the seamless switching funct...
Claims
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IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 徐冲杜小刚潘毅胡崚
Owner 武汉武新电气科技股份有限公司