A Passive Current-Voltage Integrated Sensor

Abstract

The invention proposes a passive-type current and voltage integrated sensor, and the sensor consists of two sensing parts nearby a transmission conductor. Each sensing part consists of a substrate, a magnetic core coil, a metal layer, a connection conductor, a bonding pad, and a fixing device. The magnetic core coils are located on the upper surfaces of the substrates, and form current sensors along with the connection conductors and the bonding pads. The metal layers are located on the lower surfaces of the substrates, and form voltage sensors along with the connection conductors and the bonding pads. The fixing devices are located below the metal layers, and distances between the two sensing parts and the transmission conductor are difference. The two sensing parts are disposed on the surface of the transmission conductor through the fixing devices. The distance between the sensor and the transmission conductor is determined by the heights of the fixing devices, and is convenient to adjust. The sensor is based on the microfabrication technique, and the sensing parts respectively employ passive measurement and can detect the current and voltage signals at the same time. The sensor does not need an external power supply, is low in power consumption, is simple in structure, is miniaturized, is good in linearity, is large in dynamic range, is low in cost, and facilitates the batch production.

Description

technical field [0001] The present invention relates to the field of power grid and micro-electro-mechanical system (Micro-Electro-Mechanical System, MEMS for short) technical field, in particular to a passive current-voltage integrated sensor. Background technique [0002] At present, there are more current monitoring equipment for substations and user terminals, but less current monitoring equipment for overhead lines connecting substations and users. With the access of a large number of distributed power sources and fluctuation loads such as electric vehicles, the distribution network The operation mode will change significantly, which will bring severe challenges to distribution network state estimation, optimal dispatch and online fault location. [0003] Current sensors and voltage sensors are important devices for on-line status monitoring of power systems. Its accuracy and reliability are closely related to the safe and reliable operation of the power system. At pr...

AI Technical Summary

Problems solved by technology

At present, most distribution networks use large-scale transformers to detect voltage signals and current signals, which are not only large in size, complex in structure, expensive, and inconvenient to install

In addition, the voltage transformer is generally measured by touching the ground, and the earth is used as the reference potential, which may easily lead to the occurrence of creepage

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