Ice melting device with reactive compensation and adjustable output current

Abstract

The embodiment of the invention discloses an ice melting device with reactive compensation and adjustable output current. The ice melting device comprises at least one transformer, at least one inverter circuit, a fundamental wave electric signal detection module and a control module. The transformer comprises a primary winding and a secondary winding, the primary winding is connected between a power grid and a harmonic source in series or in parallel, the secondary winding is connected with the inverter circuit, and the inverter circuit is connected with the control module; the fundamental wave electric signal detection module is respectively connected with the primary winding and the control module and is used for detecting the current or voltage of the primary winding; the control module is used for controlling the inverter circuit to output fundamental current to be injected into the secondary winding according to the current of the primary winding so as to adjust the impedance ofthe primary winding, so that the output current is adjusted, and line ice melting can be realized when the current reaches the critical ice melting current of the line; or, according to the voltage ofthe primary winding, the inverter circuit is controlled to output fundamental voltage to be injected into the secondary winding so as to adjust the impedance of the primary winding, and the reactivecompensation function is achieved.

Description

technical field [0001] Embodiments of the present invention relate to micro-grid current regulation technology, and in particular to an ice-melting device with reactive power compensation and adjustable output current. Background technique [0002] In order to prevent ice disasters caused by icing on lines during the ice period, domestic and foreign scholars have studied a variety of deicing methods, which can be divided into thermal deicing methods, mechanical deicing methods, natural deicing methods and other deicing methods according to different principles. At present, the thermal deicing method is mainly used for line deicing, among which the DC deicing method and the AC short circuit deicing method are relatively mature thermal deicing methods. In 2001, Charles R S of Dartmouth College in the United States proposed a high-frequency (8-200kHz) AC ice-melting method for transmission lines from the perspective of skin effect and dielectric loss. The above ice-melting met...

AI Technical Summary

Problems solved by technology

The above ice melting methods have a series of disadvantages, such as small current adjustment range, low applicable voltage level, and the introduction of a large number of harmonics, so they can only be applied in certain specific occasions.

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