Novel high-voltage-side inductive-electricity-taking power-supply device

Abstract

The invention provides a novel high-voltage-side inductive-electricity-taking power-supply device which includes an electricity taking module and an electric-energy conditioning module. The electricity taking module includes a primary bus, a current transformer magnetic core, a secondary coil and a sampling resistor. The electric-energy conditioning module includes a rectifying circuit, a transformer discharge circuit, a resistance discharge circuit, a ripple-wave filtering capacitor, a voltage-stabilizing circuit, an STM8 single-chip microcomputer control system and a circuit switching relay. The novel high-voltage-side inductive-electricity-taking power-supply device is capable of using electric energy which is obtained through induction when the current transformer is unsaturated and also capable of using peak electric energy which is obtained through induction when the current transformer is unsaturated to supply electric energy to a rear-end load so that power consumption of the resistance discharge circuit is reduced and power-supply efficiency is improved and output power of the power supply after a magnetic core of the current transformer enters deep magnetic saturation is ensured.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a power supply device capable of inductively picking up electricity from a high-voltage tester in a non-contact manner, which can provide low-voltage power supply for monitoring devices installed on high-voltage transmission lines or high-voltage switch cabinets. Background technique [0002] Electrical equipment or monitoring equipment placed in high-voltage areas are usually powered by solar cells or inductive power supplies. Solar cells are costly, bulky, limited in installation location, unstable in power, and inconvenient to use. The inductive power supply uses the principle of electromagnetic induction and magnetic saturation technology to obtain electric energy by inducing the current on the high-voltage side through the current transformer. It has the advantages of low cost, small size, flexible installation, and stable output. Compared with solar cells, induction po...

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Problems solved by technology

However, this method uses all the peak voltage output by the power transformer as an overvoltage release, which not only increases the heat generation of the power supply, reduces the efficiency of the power supply, but also reduces the output power of the power supply when the core of the current transformer is deeply magnetically saturated. Greatly reduced

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