Arc extinguishing overvoltage protection method for intelligent switch
A technology of intelligent switch and overvoltage, which is applied in the direction of emergency protection circuit device, emergency protection circuit device and electrical components used to limit overcurrent/overvoltage, and can solve the problem that it is difficult to eliminate the circuit damage of arc electrical equipment and the inability of arc sensor Timely and accurate induction of arc phenomenon and other problems, to achieve the effect of arc suppression and overvoltage protection
Active Publication Date: 2020-11-10
NINGBO UNIV
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Problems solved by technology
However, this type of arc suppression overvoltage protection method based on the arc sensor depends largely on the accuracy of the arc induction used by the arc sensor, and the accuracy of the arc induction will also be biased with the prolongation of the use time of the arc sensor. As a result, the arc sensor cannot accurately sense the arc phenomenon in the circuit in time, and the arc overvoltage shrapnel cannot eliminate the damage to the electrical equipment circuit due to the failure of timely execution of the action.
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] see figure 1 As shown, this embodiment provides a smart switch arc suppression overvoltage protection method, including the following steps:
[0026] Step 1, setting multiple arc sensors on the circuit where the smart switch is located, and assigning a corresponding identification number to each arc sensor; wherein, the total number of arc sensors on the circuit where the smart switch is located is marked as M, The identification number of the mth arc sensor is marked as Arcsensor m , 1≤m≤M;
[0027] Step 2, within the preset time period T, respectively obtain the arc induction accuracy rate of each arc sensor on the circuit where the smart switch is located according to the preset collection time; wherein, the preset collection time within the preset time period T is total Quantity marked as N s , at the nth preset acquisition mome...
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The invention relates to an arc extinguishing overvoltage protection method for an intelligent switch, and the method comprises the steps: collecting the arc induction accuracy of each arc inductor ona circuit where the intelligent switch is located in a preset time period, and carrying out the fitting to obtain an arc induction accuracy real-time fitting curve and an arc induction accuracy standard deviation value of each arc inductor; acquiring arc induction accuracy real-time change curves, respectively calculating inflection point moments corresponding to inflection point values of the arc induction accuracy rate real-time change curves respectively, and searching an abnormal arc inductor according to the arc induction accuracy rate of the arc inductor at the current moment before thecontinuous starting time of the circuit where the intelligent switch is located is away from the inflection point moment; obtaining an arc induction accuracy self-adaptive correction value of the abnormal arc inductor at the current moment value, and when the arc induction accuracy self-adaptive correction value of the abnormal arc inductor at the current moment exceeds a preset arc induction accuracy threshold value, executing an arc overvoltage elastic sheet action on the circuit where the intelligent switch is located; thereby achieving the arc extinguishing overvoltage protection of the intelligent switch.
Description
technical field [0001] The invention relates to the field of electrical equipment, in particular to an arc suppression overvoltage protection method for an intelligent switch. Background technique [0002] In the field of electrical equipment, the circuit of electrical equipment is more likely to be grounded by arcing due to short circuit, resulting in overvoltage in the circuit, resulting in accidents such as motor insulation breakdown, lightning arrester explosion, and voltage transformer burnout, which affect the normal operation of electrical equipment. and safe. [0003] In order to deal with the arc-to-ground phenomenon in electrical equipment and avoid the adverse effects of overvoltage on the circuit caused by arc-to-ground, current electrical equipment will be equipped with an arc-suppression overvoltage protection device. When the arc suppression overvoltage protection device is working, once it detects that the circuit has a short circuit and arc grounding occurs...
Claims
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Login to View More IPC IPC(8): H02H9/08H02H7/22
CPCH02H9/08H02H7/222
Inventor 郑紫微陈平顺赵婷段欢
Owner NINGBO UNIV