Direct-current electric field detecting device used under condition of hybrid electric field

Abstract

The invention provides a direct-current electric field detecting device used under the condition of a hybrid electric field. The direct-current electric field detecting device used under the condition of the hybrid electric field comprises a signal receiving module, a signal conditioning module, a phase sensitive detection module and a PSO multi-frequency notch module. The signal receiving module comprises the output end connected with the input end of the signal conditioning module and further comprises the output end connected with the input end of the phase sensitive detection module. The output end of the signal conditioning module is connected with the other input end of the phase sensitive detection module. The output end of the phase sensitive detection module is connected with the input end of the PSO multi-frequency notch module. According to the direct-current electric field detecting device used under the condition of the hybrid electric field, through the PSO multi-frequency notch design method, unnecessary frequencies are filtered out. Compared with a traditional lowpass filter, the dynamic response of a system is improved.

Description

Technical field: [0001] The invention relates to a direct current electric field detection device, in particular to a direct current electric field detection device in ground mixed electric field under the condition of alternating current and direct current in the same corridor. Background technique [0002] With the rapid development of UHV DC, people pay more attention to the electromagnetic environment around the transmission line, the ground mixed electric field under the transmission line, and the ground mixed electric field under the transmission line is measured with a rotating electric field sensor. This sensor is suitable for the measurement of the ground electric field offline. [0003] A large number of UHV AC and DC projects have been launched and the transmission corridors have become increasingly tense. More and more AC transmission lines and DC transmission lines are erected on the same corridor, or even on the same tower. [0004] Different from a single DC ...

AI Technical Summary

Problems solved by technology

[0005] The existing rotating electric field sensor has the following problems in measuring the ground synthetic electric field in the same corridor environment: the induced charge of the conductor in the electric field is proportional to the electric field applied by the outside, if the measured electric field is a DC electric field, the electric field intensity E( t) can be considered as a constant, that is, a quantity that does not change with time

Therefore, in order to overcome the interference of the traditional electric field sensor by the AC electric field in the same corridor environment and affect the measurement accuracy of the combined electric field, it is necessary to provide a new DC electric field detection device under the mixed electric field

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