Equipotential high-tension electric energy measuring apparatus of authigenic power supply

Abstract

The invention discloses a device for measuring equipotential high-voltage electricity with a self power source and belongs to the technical field of electricity measurement. The invention uses a cheap low-voltage AC transformer (CT) for inducing electricity current from a high-voltage wire and converts the induced electricity current to a DC stabilized voltage source through rectification, filtration, amplitude limit and voltage regulation, the cathode of the voltage source is connected with the high-voltage wire, thus combining into a DC stabilized voltage source with the reference potential equipotential with the high-voltage wire. The DC stabilized voltage source can be taken as a power source of an electricity measurement or computation circuit for implementing equipotential electricity measurement or computation, and transmitting the measurement or computation data to a ground computer system for various processing through an optical fiber or a wireless way. An insulated isolation optical fiber or a space of the measurement or computation device is independent of voltage class, and the volume, weight and production cost of the measurement or computation device which is applied in high-voltage measurement are one tenth or less than one twentieth of those of traditional equipment, simultaneously the equipotential measurement can implement the transduction which takes the definition type of the ohm's law, thus not only saving a secondary mutual inductance and markedly improving measurement precision, but also implementing complete information measurement.

Description

technical field [0001] The invention relates to a self-generated power source equipotential high-voltage electric energy measuring device, which belongs to the technical field of electric power measurement. Background technique [0002] Electric energy metering and measurement is an important link in the power system. Traditional high-voltage electric energy metering and measuring devices generally consist of voltage transformers (PTs), current transformers (CTs), and metering and measuring instruments. In the process of metering and measuring electric energy, the measurement accuracy is not only closely related to the measurement instrument, but also more closely related to the precision and accuracy of the current sensor and voltage sensor. Therefore, the performance, quality and cost of the AC sensor directly affect the power system. High measurement accuracy, safe and reliable and economical operation. At present, traditional high-voltage measurement equipment uses elec...

AI Technical Summary

Problems solved by technology

With the development of the power system, the current and voltage are getting higher and higher

In order to solve the problem of high-voltage electric energy measurement, all countries in the world have not stopped the research and development of new electric energy measurement equipment for many years and have made some progress, but have not yet achieved a qualitative breakthrough. The mainstream of high-voltage measurement still uses electromagnetic induction current and voltage transformers. Traditional model of adding measuring instruments

Images