Embedded electric energy measuring method and application extension method of high voltage electrical switchgear

Abstract

The invention relates to an embedded electric energy measuring method and an application extension method of a high voltage electrical switchgear and belongs to the field of intelligent high-voltage electricity. A high voltage intelligent electric energy measuring unit comprises a high-voltage current sampling device, a high-voltage voltage sampling device, an electric energy measuring module, a source unit and a wireless transmission module. The embedded electric energy measuring method and the application extension method are characterized in that the components of the high voltage intelligent electric energy measuring unit are respectively embedded inside the high voltage electrical switchgear to acquire an mA-grade standard current measuring signal proportional to the current of the switchgear and an mV-grade standard voltage measuring signal proportional to the voltage of the switchgear; and the mA-grade standard current measuring signal and the mV-grade standard voltage measuring signal are input into the electric energy measuring module to complete signal processing and electric energy measurement. The application of the high voltage electrical switchgear to pre-paid management and intelligent control is extended by the method. According to the invention, the electrical isolation of a high voltage switch is utilized, the manufacturing materials are saved, the occupied space is reduced, the measurement cost is greatly reduced, the embedded electric energy measuring method and the application extension method of the high voltage electrical switchgear are widely used for the high voltage electric energy measurement, the high voltage electric energy monitoring and the intelligence of the high voltage electrical switchgear, the safety operation coefficient is improved, and the functions of intelligence, electric larceny prevention, data acquisition and transmission are increased.

Description

technical field [0001] According to the working characteristics of electrical equipment, the invention realizes the electric energy measurement and intelligent application of high-voltage electrical switchgear through the rational design of electromechanical integration, belongs to the field of high-voltage electric energy measurement and monitoring, and specifically provides an embedded high-voltage electrical switchgear Type electric energy measurement method and extended application method. Background technique [0002] At present, switchgears such as circuit breakers, switchgears, and ring network cabinets in the power system are connected in series with high-voltage electric energy metering equipment, and have the characteristics of coexistence and complementarity, two sets of insulation, and two sets of structures. With the development of modern technology, a large number of small-sized outdoor vacuum circuit breakers are outdoor power distribution equipment with rated...

AI Technical Summary

Problems solved by technology

Electromagnetic current transformers are large in size, heavy in weight, high in cost, and easy to saturate iron cores, while electromagnetic voltage transformers, in addition to the above shortcomings, have electromagnetic resonance, high-order harmonics, and operating overvoltages that will affect the safe operation of voltage transformers. At the same time, the wire cross section of PT is very small, which is a relatively fragile product in the power system application components. When the system has resonance or odd harmonic sources, it is easy to burn the PT and affect the power system. safe operation

Moreover, the energy consumption of PT is high during operation, which is not conducive to energy saving and reduction of power transmission and metering loss.

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