Dry-type air-core reactor maximum short-time current experiment device and experiment method thereof

Abstract

The invention discloses a dry-type air-core reactor maximum short-time current experiment device and an experiment method thereof. The device comprises a single-phase voltage regulator T1, a test transformer T2, a rectification silicon stack D, a protection water resistor R1, a current shunt R2, a first circuit breaker ZN1, a second circuit breaker ZN2, an electrostatic voltmeter C1, a charging capacitor C2, a capacitive voltage divider, an oscilloscope XSC and a test sample dry-type air-core reactor L. Due to the fact that a direct-current charging method is adopted, only a test transformer with very small capacity is needed, and the capacity is not larger than 100 kVA; by utilizing the zero input response characteristic of the second-order circuit, when the capacitor is switched on at the highest voltage, the current of the loop is increased from the minimum zero current value to the maximum peak value, so that the current impact on the circuit breaker is minimum; the test loop is simple, a complex software control system is not needed, a large-capacity alternating-current transformer power supply and an oscilloscope are not needed, and the test device is a conventional instrument.

Description

technical field [0001] The invention belongs to the technical field of reactors, and in particular relates to a dry-type air-core reactor maximum short-time current experimental device and an experimental method thereof. Background technique [0002] The series reactor is connected in series with the shunt capacitor, which is used to limit the closing inrush current of the capacitor bank, limit the external inrush current generated when the fault or adjacent capacitor bank is switched, or be used for detuning of the capacitor bank, so as to avoid resonance with the power system. The closing inrush current can reach thousands of amps to tens of thousands of amps depending on the capacity and impedance of the circuit. [0003] The maximum short-term circuit test is the mechanical strength endurance test of the reactor under the action of strong current, and it is an assessment of the comprehensive technical ability and process level of the reactor manufacturing. According to ...

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Problems solved by technology

Due to the large investment, it is difficult for reactor manufacturers to invest huge sums of money in purchasing test equipment

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