Inductive energy-taking type alternating current and direct current combined power supply system and control method

Abstract

The invention discloses an inductive energy-taking type alternating current and direct current combined power supply system and a control method. The combined power supply system comprises a main circuit and a power supply control and energy management system; the main circuit comprises an alternating current taking circuit, a main power supply circuit, a charging circuit, a backup power supply circuit and a supporting capacitor C1; the positive electrode end of the supporting capacitor C1 is connected with a rectification bus; the power supply control and energy management system comprises aDC-DC main controller and a rectification bus voltage sampling circuit; a rectification bus voltage can reflect an energy balance relation between the alternating current input power of an electricity-taking CT and the power consumption of a load and the power supply system; and the DC-DC main controller can judge the energy balance relation according to the rectification bus voltage, select corresponding control strategies according to different energy balance relations, and generate control signals capable of meeting the requirements of the corresponding control strategies. The invention further discloses an alternating current and direct current combined power supply method. By adopting the inductive energy-taking type alternating current and direct current combined power supply system,zone control is carried out according to the rectification bus voltage.

Description

technical field [0001] The invention belongs to the technical field of inductive power acquisition in electric power systems, and in particular relates to an inductive energy-harvesting AC-DC combined power supply system, and also relates to a control method for inductive energy-harvested AC-DC combined power supply. Background technique [0002] With the rapid development of electric power construction, the scale of the power grid continues to expand, and there are more and more work on power grid construction and equipment maintenance under complex terrain conditions. An important part of. In order to ensure the safe and stable operation of the power system, it is indispensable to install some online monitoring devices for high-voltage transmission lines. Actual operation experience shows that many monitoring equipment cannot run stably for a long time after installation, and the main factor restricting the reliable operation of these online monitoring equipment is the po...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides an induction energy harvesting type AC-DC combined power supply system, which solves the technical problem of complex and redundant state switching judgment conditions in the prior art, and can be based on the only key parameter, that is, the rectifier bus Voltage, optimal control of power supply and charging process

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