Test method, equipment and storage medium of arc suppressing coil parallel connection low resistance grounding device
A technology of arc suppressing coil and grounding device, which is applied in the direction of measuring device, measuring electricity, measuring electric variables, etc., and can solve the problems of lack of test methods for arc suppressing coil parallel connection with low resistance grounding device, etc.
Active Publication Date: 2021-04-02
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology
However, there is currently a lack of test methods for arc suppression coils connected in parallel with low-resistance grounding devices in the market
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0053] see figure 1 , the test circuit for simulating a single-phase ground fault includes a three-phase system power supply U, an arc suppression coil connected in parallel with a low-resistance grounding device ASCPLR, a three-phase capacitor bank C for simulating the capacitance to ground of a three-phase system, the first switch module k1, the second The second switch module k2 and the third switch module k3; the arc-suppression coil parallel connection lo...
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The invention discloses a test method for an arc suppression coil parallel low-resistance grounding device, a test apparatus for an arc suppression coil parallel low-resistance grounding device and astorage medium. The method comprises the following steps that: a first switch module, a second switch module and a third switch module are controlled to perform N times of switching, so that one-timesingle-phase metallic grounding faults, impedance grounding faults and arc grounding faults can be simulated; low-resistance switching parameters obtained when any grounding fault occurs are adopted as first test parameters, wherein the low-resistance switching parameters comprise the voltage to earth of a neutral point, compensation current outputted by an arc suppression coil, the current of a grounding point, the current of a low-resistance grounding resistor and the removal time of the low-resistance grounding resistor, wherein the voltage to earth of the neutral point, the compensation current outputted by the arc suppression coil and the current of the grounding point are obtained when the low-resistance grounding resistor is not switched on, and the current of the low-resistance grounding resistor is obtained when the low-resistance grounding resistor is switched on; and when the first test parameters meet preset one-time single-phase grounding test conditions, it is confirmed that the arc suppression coil parallel low-resistance grounding device passes a one-time single-phase grounding fault test. With the method adopted, the reliability of the arc suppression coil parallellow-resistance grounding device can be verified.
Description
technical field [0001] The invention relates to the technical field of arc-suppression coil parallel connection low-resistance grounding, in particular to a test method, equipment and storage medium for an arc-suppression coil parallel connection low-resistance grounding device. Background technique [0002] In the power system, the neutral point grounding method is selected according to the insulation level of the grid equipment and the size of the capacitor current. For the distribution network dominated by overhead lines, the neutral point is generally grounded through the arc suppression coil; for the urban distribution network dominated by cable lines, the single-phase ground fault capacitor current is large, and the neutral point is usually used. Grounded via a small resistor. However, the grounding method of the neutral point through the arc suppression coil brings certain difficulties to the permanent fault line selection, and it is difficult to quickly and accurate...
Claims
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IPC IPC(8): G01R31/00
CPCG01R31/00G01R31/003
Inventor 袁耀
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD