Novel self-energy-taking voltage sensor

Abstract

The invention discloses a novel self-energy-taking voltage sensor which comprises a high-voltage electrode, a primary high-voltage capacitor a, a primary high-voltage capacitor b, a secondary low-voltage capacitor, a transformer, an overvoltage protection circuit a, an overvoltage protection circuit b, an outer insulating sleeve and a circuit board base. The primary high-voltage capacitor a and the transformer form an energy taking circuit. The primary high-voltage capacitor b and the secondary low-voltage capacitor form a sampling circuit; an energy conditioning module, an energy storage module, a signal acquisition module, a data coding module and a data sending module are arranged in the circuit board base; the sensor adopts optical digital signal output to eliminate the problem that transmission is easily interfered due to direct output of analog signals, the sensor adopts a mode of acquiring energy nearby, the influence of VFTO on a sampling circuit can be effectively eliminated, the performance of the voltage sensor is further improved, meanwhile, the sensor has an energy storage function, and the signal output function of the sensor can be met within a certain time under the condition of line disconnection.

Description

Technical field[0001]The present invention belongs to the field of smart distribution mesh and signal sensing technology, and specific relates to a new type of self-extracting energy voltage sensor.Background technique[0002]Smart distribution network is an important part of the group of smart grids, which utilizes modern electronic technology, communication technology, computer and network technology to distribute online data and offline data, distribution network data, and user data, grid structure and geographical graphics. Perform information integration, realize the intelligent, advanced sensor measurement technology of monitoring, protection, control, electricity and distribution management in the normal operation of power distribution system, and is one of the main technical contents of intelligent distribution network. At present, a voltage sensor for distributing a high voltage is converted into secondary low voltage signals in an analog or digital manner to a secondary devi...

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Problems solved by technology

[0003] However, voltage sensors for distribution networks are generally used in high-voltage switchgear such as ZW20 and ZW32. The analog electrical signal output mode of the sensor is easily affected by the interference signal of the switching action, resulting in abnormal output signals; the optical digital signal output mode of the senso

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