Protection performance verification method for internal fuses of high voltage capacitor unit
A technology of high-voltage capacitors and capacitor units, which is applied in the field of power capacitors, and can solve problems such as capacitors not working properly, internal fuses that cannot be fused, and unreliable fusing, etc.
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[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0039] The invention is used for judging the protection performance of the internal fuse in the high-voltage capacitor unit, and avoiding the expansion of faults caused by improper selection of the internal fuse. The specific method includes the following steps.
[0040] Step 1) Determine the equivalent circuit of the capacitor device when a certain capacitor element in a capacitor unit breaks down.
[0041] In the present invention, it is assumed that the capacitor device is composed of M capacitor units connected in series and parallel, and the interior of the capacitor unit is composed of m parallel capacitor elements and n series capacitor elements, and each capacitor element is connected in series with an internal fuse. The basic requirements for breaking and isolating the internal fuse are: when the capacitor element breaks down...
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