Power supply device for taking electricity from high-voltage side in induction manner

Abstract

The invention relates to field of electric, in particular to a power supply device for taking electricity from a high-voltage side in an induction manner. The power supply device can provide a low-voltage power supply for a monitoring device arranged on a high-voltage transmission line or in a high-voltage switch cabinet. The structure of the power supply device comprises an electricity taking module, an electric energy conditioning module and an intellectual protection module, wherein the electricity taking module comprises a primary busbar, an current transformer magnetic core, a secondary coil, a sample resistor and a single-pole double-throw relay; the electric energy conditioning module comprises a rectification circuit, a point bleeder circuit, a grain wave filter capacitor and a voltage-stabilizing circuit; and the intellectual protection module comprises an STM8 singlechip, an RF (radio frequency) module and a super capacitor. The power supply device for taking electricity from high-voltage side in the induction manner has a protection function and an intelligent monitoring function, effectively protects the power supply device and a rear load from being burned, and real time monitor the power supply through the RF module, and ensures safety and stability of providing power supply for an outer load.

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] The development of smart grid requires adding auxiliary devices for monitoring on high-voltage transmission lines or high-voltage switch cabinets to improve the state monitoring capabilities of power transmission and transformation. not easy. At present, the commonly used power supply methods for auxiliary devices include solar cells and induction power sources. Solar cells are costly, bulky, limited in installation location, unstable in power, and inconvenient to use. The induction power supply uses the principle of electromagnetic induction and magnetic saturation technology to obta...

AI Technical Summary

Problems solved by technology

However, this method has problems in practical

The transmission line or high-voltage switchgear may need to be overloaded due to the tight load. Although there is a certain margin for the current when designing the circuit, once the overload current exceeds the specified maximum current, the CT power supply will have a protective circuit damage fault, which will burn the rear. load, causing huge economic losses

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