A non-inductive compensation technical solution for the measurement of transmission AC loss in superconducting units

Abstract

The invention belongs to the technical field of superconducting power, and relates to a non-inductive compensation technical scheme for measuring the transmission alternating-current loss of a superconducting unit. The technical scheme comprises a multi-channel high-precision data acquisition card and a programmable processor. Firstly, a current signal and a voltage signal of the superconducting unit, acquired by the multi-channel high-precision data acquisition card are converted into analog signals to be sent to the programmable processor, and then the transmission alternating-current loss of the superconducting unit is displayed in real time through a band-pass filtering module, a compensation reference voltage generation module, an automatic compensation factor search module, a post-compensation voltage generation module, a phase tracking module, an error correction module and an alternating-current loss solving module which are written in advance by the programmable processor.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of superconducting power, and more specifically relates to a non-inductive compensation technical solution for measuring the transmission AC loss of a superconducting unit. Background technique: [0003] Since the discovery of superconducting materials, due to their potential huge advantages in the field of electric power technology, they have been favored and concerned by international scholars. Because the superconductor will generate loss when it operates in the alternating magnetic field or alternating transmission current workplace, this loss is called the AC loss of the superconductor. From a physical point of view, AC loss can be divided into hysteresis loss, eddy current loss and coupling loss. The AC loss of superconductors increases the burden on the cooling system in power equipment. Once the heat generated by superconducting materials cannot be taken away in time, the superconducting equ...

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Problems solved by technology

[0006] Aiming at the problem that the lock-in amplifier used in the existing superconducting unit electrical measurement method is relatively expensive, easily damaged and difficult to meet the high-current working conditions, and the use of compensation coils has a large impact on the main circuit, the invention provides a superconducting A non-inductive compensation technology solution for unit transmission AC loss measurement. This method uses a multi-channel high-precision data acquisition card and a programmable processor to measure the transmission AC loss of superconducting units in real time and quickly.

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